CN106195410B

CN106195410B - Pneumatic control valve

Info

Publication number: CN106195410B
Application number: CN201610729787.4A
Authority: CN
Inventors: 师洪亮
Original assignee: CHENGDU OPTIMUX CONTROL VALVES & INSTRUMENT Co Ltd
Current assignee: Chengdu Zhirong Zhichuang Intellectual Property Operation Co ltd
Priority date: 2016-08-26
Filing date: 2016-08-26
Publication date: 2018-10-12
Anticipated expiration: 2036-08-26
Also published as: CN106195410A

Abstract

The invention discloses pneumatic control valves, including valve body and spool, liquid chlorine runner is provided in valve body, valve body both sides are equipped with the inlet and outlet being connected to liquid chlorine runner, spool includes insert body and U-shaped valve seat, horizontal positioned U-shaped valve seat is mounted on the middle part of liquid chlorine runner, the liquid chlorine runner is separated into first segment runner and second segment runner by U-shaped valve seat, outer diameter conical section is equipped on sprue lower face, it is provided with connection cavity in two vertical sections of U-shaped valve seat, valve rod is vertically through two connection cavitys, circumferential on its external wall equipped with multiple fixture blocks along conical section, it is provided with multiple card slots on connection cavity inner wall, it is fixed with sealing ring in the lower face of conical section.Pass through the reciprocating motion of valve rod in the vertical direction, the connection and opening and closing between liquid chlorine storage tank and transfer cask can be realized, and then fast implement accurately controlling for liquid chlorine flow during liquid chlorine filling, avoid because liquid chlorine shut off not in time or shut off low precision due to lead to the leakage of liquid chlorine.

Description

Pneumatic control valve

Technical field

The present invention relates to a kind of control valves, in particular to pneumatic control valve of liquid chlorine filling system.

Background technology

In chemical industry chlor-alkali production industry, product is related to the harmful influences such as liquid chlorine, and sale is filled with prodigious difficulty, and Fill the very various complexity of formality；Since liquid chlorine has toxicity, easily gasification, once it reveals, handle not in time or can not locate It when reason, will cause serious injury to the person, to cause serious accident, therefore it fills requirement strictly, safety guarantee Measure must be perfect.When liquefied chlorine cistern car carries out, tank car pressure can increase with liquid chlorine temperature rise in tank car, once hypertonia Tank car tank body just has the danger exploded.Any liquid chloro container, volumetric efficiency must not exceed 80%, it is seen that liquid chlorine filling Accurate metering in the process just seems particularly significant, not only to consider safety factor, but also as benefit unit, measuring accuracy Also it is directly related to sales achievement.However, the metering that fills of liquid chlorine is a complex process affected by many factors, such as fill Measurement error caused by the type selecting and installation error of device itself fills measurement error, ring caused by pipeline gas-liquid two-phase evacuates Measurement error caused by the temperature of border, error caused by extraneous vibration interference etc..Benefit is measured to improve quantifying and loading simultaneously, is reduced The lost on sale that measurement error is brought, selecting one kind not only has higher measuring accuracy, stability but also compares proper measurement environment Mass flowmenter and i.e. open the quantitative controller stopped to improve safety, just seem necessary.

Invention content

The purpose of the present invention is to provide pneumatic control valves, ensure flexible modulation of the liquid chlorine when filling, improve liquid chlorine Measuring accuracy.

The purpose of the invention is achieved by the following technical solution：

Pneumatic control valve, including valve body and spool, are provided with liquid chlorine runner in valve body, valve body both sides be equipped with respectively with liquid chlorine The inlet and outlet of runner connection, the spool include insert body and matched U-shaped valve seat, are horizontally arranged U-shaped valve Seat is mounted on the middle part of liquid chlorine runner, and the liquid chlorine runner is separated into first segment runner and second segment runner by U-shaped valve seat, described Insert body includes valve rod and two sprues being arranged at intervals on valve rod, and outer diameter is equipped on sprue lower face along valve rod axis The conical section that direction is successively decreased downwards, conical section are set on the outer circle wall of valve rod, and the U-shaped valve seat is horizontal positioned, and in U-shaped It is provided in two vertical sections of valve seat and conical section is matched is connected to cavity, valve rod runs through two connection chambers vertically Body is circumferentially being equipped with multiple fixture blocks along the conical section, the multiple and card is provided on connection cavity inner wall on its external wall The adaptable card slot of block is fixed with sealing ring in the lower face of the conical section, and the outer diameter of the sealing ring is more than the connection The internal diameter of cavity lower ending opening；Supporter is installed in valve body upper end, support plate is fixed on supporter upper surface, in supporter Portion is provided with cavity, is equipped with drive rod in valve rod upper end, the drive rod activity is prolonged upwards after the cavity, support plate It stretches, filler is provided in the cavity, be additionally provided with retreat stop block in valve inner, the upper surface of retreat stop block is provided under face valve rod The retaining hole of end is equipped with spring in the retaining hole, and organ cover, and institute are fixed on the outer wall of the valve rod lower end The lower end for stating organ cover is connect with valve body lower end inner wall.

For in the prior art, control spool be susceptible to when in use shut off it is inaccurate caused by leakage problem, hair It is bright that existing spool is improved, under the premise of ensureing to control spool flexible modulation, improve shutting off precisely for control spool Degree reduces the loss of liquid chlorine while that improves liquid chlorine fills efficiency to ensure measuring accuracy of the liquid chlorine in filling process；It uses When, liquid chlorine runner is provided in valve body, and U-shaped valve seat is horizontal positioned mounted on the middle part of liquid chlorine runner so that the import of valve body By the two connection cavitys and outlet being opened on U-shaped valve seat, before filling, conical section is contacted with connection cavity wall, together When fixture block and card slot cooperate so that two connection cavitys realize primary seals, and the sealing ring on conical section lower face is then The secondary seal for realizing connection cavity lower ending opening, passes through primary seal and secondary seal so that liquid chlorine runner is sealed completely Two parts are divided into, to maintain control spool to liquid chlorine storage tank and extraneous isolation effect；When filling, liquid chlorine is flowed by import Into the first segment runner constituted between U-shaped valve base inner wall and import, stir valve rod at this time so that conical section be connected to cavity wall Between be gradually disengaged, liquid chlorine then along connection cavity and conical section between gap enter U-shaped valve seat outer wall and outlet between structure At second segment runner in, be finally injected into transfer cask body by outlet.By the reciprocating motion of valve rod in the vertical direction, The connection and opening and closing between liquid chlorine storage tank and transfer cask can be realized, and then fast implement liquid chlorine flow during liquid chlorine filling Accurately control, avoid because liquid chlorine shut off not in time or shut off low precision due to lead to the leakage of liquid chlorine, to reach guarantee liquid chlorine Flexible modulation when filling improves the purpose of the measuring accuracy of liquid chlorine.

Wherein, liquid chlorine cut-off sealing is realized by the cooperation between spool and U-shaped valve seat in valve body, and the driving of valve rod Part is equally susceptible to leakage, therefore inventor, in the upper surface fixed support body of valve body, the upper end of supporter is fixed with branch Fagging, for the support plate for installing the driving parts such as cylinder, the upper end of valve rod is equipped with drive rod, and is equipped in the middle part of supporter Cavity, is filled with filler in cavity, and drive rod upwardly extends after cavity and support plate of the activity in supporter successively, directly To being connect with the output end of driving part, similarly, gasket is installed in supporter lower end, which can be by drive rod Lower end and cavity between completely cut off and open, by gasket and dual-seal of the filler to drive rod, can avoid the liquid chlorine in valve body It is leaked at driving part through spool, also, axle sleeve is installed in the junction of support plate and supporter, drive rod activity runs through The axle sleeve is up and down reciprocatingly transported with ensureing that drive rod can be realized after being connect with driving part output end under air-proof condition It is dynamic.And organ cover is installed on valve rod lower end outer wall, which opens in retaining hole with valve inner isolation, is moved down in valve rod When, organ cover is compressed and is moved down together with valve rod, and the spring in retaining hole then utilizes deformation and the shape of itself Become elastic force caused by replying to the movement tendency of valve rod into row buffering, retaining hole and valve interior wall are rushed with reducing valve rod It hits, avoids valve rod from being impacted and influence the sealing between conical section and U-shaped valve seat.

The width of the fixture block successively decreases downwards along the axis direction of the valve rod.The cooperation of fixture block and card slot makes conical section Increase with the contact area being connected between cavity wall, that is, increases the sealing effect of primary seal, while the width of fixture block is along valve rod Axis direction successively decrease downwards, similarly be connected to cavity wall on card slot groove width also successively decrease downwards along the axis direction of valve rod, i.e., The liquid chlorine residual quantity in card slot can be reduced when being blocked to liquid chlorine runner, and fixture block is in the contact process with card slot, The deformation quantity that fixture block is squeezed and occurs can be restricted in the part that card slot groove width is gradually reduced, i.e., fixture block and card slot it Between interaction force along valve rod axially direction directed downwardly be incremented by, and then increase primary seal sealing effect.

The longitudinal cross-section of the sealing ring is the U-shaped being horizontally arranged.Preferably, the longitudinal cross-section of sealing ring is U-shaped, i.e., In the folding process of valve rod, sealing ring is gradually contacted with the lower ending opening of connection cavity, until card slot agrees with completely with fixture block, Valve rod stops movement, and sealing ring occurs certain deformation and realizes secondary seal to the lower end for being connected to cavity at this time, and longitudinal cross-section For U-shaped sealing ring be connected to cavity occur mutually squeeze when, the deformation of sealing ring outer circumference is by its U-shaped part Have certain deformation space, that is, the part for playing sealing function on sealing ring is prevented not cause internal action stress concentration And be damaged, to ensure the stability of secondary seal, while extending the service life of sealing ring.

The fixture block and sealing ring are all made of polytetrafluoroethylene (PTFE) material.Preferably, liquid chlorine have it is active chemically Matter is provided simultaneously with corrosivity, and service life of the general rubber material as sealing medium under liquid chlorine environment is shorter, is easy There is the phenomenon that hardening cracking, and inventor selects polytetrafluoroethylene (PTFE) material to be utilized as fixture block and the raw material of sealing ring Its good corrosion resistance is extended simultaneously with ensureing to ensure the stability of primary seal and secondary seal in control valve The service life of fixture block and sealing ring reduces the frequency that control valve inner part is replaced.

Compared with prior art, the present invention having the following advantages and advantages：

1, reciprocating motion of the present invention by valve rod in the vertical direction, you can realize between liquid chlorine storage tank and transfer cask Connection and opening and closing, and then accurately controlling for liquid chlorine flow during liquid chlorine filling is fast implemented, it avoids because shutting off for liquid chlorine is too late When or shut off low precision and the leakage of liquid chlorine caused to improve liquid chlorine to reach the flexible modulation for ensureing liquid chlorine when filling The purpose of measuring accuracy；

2, the card slot groove width on connection cavity wall of the invention is also successively decreased downwards along the axis direction of valve rod, i.e., to liquid chlorine Runner can reduce the liquid chlorine residual quantity in card slot when being blocked, and fixture block is in the contact process with card slot, fixture block by The deformation quantity for squeezing and occurring can be restricted in the part that card slot groove width is gradually reduced, i.e., mutual between fixture block and card slot Active force is being incremented by along valve rod axially direction directed downwardly, and then increases the sealing effect of primary seal；

3, the present invention selects polytetrafluoroethylene (PTFE) material as fixture block and the raw material of sealing ring, utilizes its good corrosion resistant Corrosion energy to ensure to ensure the stability of primary seal and secondary seal in control valve, while extending fixture block and sealing The service life of ring reduces the frequency that control valve inner part is replaced.

Description of the drawings

Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：

Fig. 1 is the structural diagram of the present invention；

Fig. 2 is the structural schematic diagram of insert body.

Label and corresponding parts title in attached drawing：

1- valve bodies, 2- imports, 3- retainings hole, 31- springs, 32- organs cover, 4- valve seats, 5- connections cavity, 51- card slots, 6- Insert body, 61- valve rods, 62- sprues, 63- conical sections, 64- fixture blocks, 65- sealing rings, the outlets 7-, 8- gaskets, 9- driving Bar, 10- fillers, 11- supporters, 12- axle sleeves, 13- support plates.

Specific implementation mode

To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make For limitation of the invention.

Embodiment 1

As depicted in figs. 1 and 2, the present embodiment includes valve body 1 and spool, and liquid chlorine runner, 1 both sides of valve body are provided in valve body 1 Equipped with the import 2 and outlet 7 being connected to respectively with liquid chlorine runner, the spool includes insert body 6 and matched U-shaped valve Seat 4, is horizontally arranged the middle part that U-shaped valve seat 4 is mounted on liquid chlorine runner, and the liquid chlorine runner is separated into first segment stream by U-shaped valve seat 4 Road and second segment runner, the insert body 6 includes valve rod 61 and two sprues 62 being arranged at intervals on valve rod 61, in sprue 62 lower faces are equipped with the conical section 63 that outer diameter successively decreases downwards along 61 axis direction of valve rod, and conical section 63 is set in the outer of valve rod 61 In circumferential wall, the U-shaped valve seat 4 is horizontal positioned, and is provided in two vertical sections of U-shaped valve seat 4 and matches with conical section 63 The connection cavity 5 of conjunction, valve rod 61 run through two connection cavitys 5 vertically, circumferential on its external wall along the conical section 63 Equipped with multiple fixture blocks 64, multiple card slots 51 being adapted with the fixture block 64 are provided on connection 5 inner wall of cavity, in the circular cone The lower face of section 63 is fixed with sealing ring 65, and the outer diameter of the sealing ring 65 is more than the internal diameter of connection 5 lower ending opening of cavity； Supporter 11 is installed in 1 upper end of valve body, support plate 13 is fixed on 11 upper surface of supporter, is provided at 11 middle part of supporter, 61 upper end of valve rod is equipped with drive rod 9, and 9 activity of the drive rod upwardly extends after the cavity, support plate 13, described It is provided with filler 10 in cavity, retreat stop block is additionally provided with inside valve body 1, the upper surface of retreat stop block is provided with 61 lower end of face valve rod Retaining hole 3, spring 31 is installed in the retaining hole 3, organ cover 32 is fixed on the outer wall of 61 lower end of the valve rod, And the lower end of the organ cover 32 is connect with 1 lower end inner wall of valve body.

For in the prior art, control spool be susceptible to when in use shut off it is inaccurate caused by leakage problem, hair It is bright that existing spool is improved, under the premise of ensureing to control spool flexible modulation, improve shutting off precisely for control spool Degree reduces the loss of liquid chlorine while that improves liquid chlorine fills efficiency to ensure measuring accuracy of the liquid chlorine in filling process；It uses When, be provided with liquid chlorine runner in valve body 1, and U-shaped valve seat 4 is horizontal positioned mounted on the middle part of liquid chlorine runner so that valve body 1 into Mouthfuls 2 two connection cavitys 5 by being opened on U-shaped valve seat 4 are connected to exporting 7, before filling, conical section 63 be connected to cavity 5 Wall contacts, while fixture block 64 cooperates with card slot 51 so that and two connection cavitys 5 realize primary seal, and under conical section 63 Sealing ring 65 on end face then realizes that the secondary seal of connection 5 lower ending opening of cavity is made by primary seal and secondary seal It obtains liquid chlorine runner and is insulated into two parts completely, to maintain control spool to liquid chlorine storage tank and extraneous isolation effect；It fills When, liquid chlorine is flowed by import 2 in the first segment runner constituted between 4 inner wall of U-shaped valve seat and import 2, stirs valve rod at this time 61 so that conical section 63 is gradually disengaged with being connected between 5 wall of cavity, liquid chlorine then between connection cavity 5 and conical section 63 between Gap enters in the second segment runner constituted between 4 outer wall of U-shaped valve seat and outlet 7, is finally injected into transport tank body by outlet 7 It is interior.Pass through the reciprocating motion of valve rod 61 in the vertical direction, you can realize the connection and opening and closing between liquid chlorine storage tank and transfer cask, And then accurately controlling for liquid chlorine flow during liquid chlorine filling is fast implemented, avoid the essence of shutting off not in time or shut off because of liquid chlorine Degree is poor and leads to the leakage of liquid chlorine, to reach the flexible modulation for ensureing liquid chlorine when filling, improves the mesh of the measuring accuracy of liquid chlorine 's.

Further, retreat stop block is additionally provided with inside valve body 1, the upper surface of retreat stop block is provided with the retaining hole of face valve rod 61 3, during valve rod 61 moves down, the end of valve rod 61 can be moved in a straight line along retaining hole 3, avoid liquid chlorine when filling to valve Bar 61 and conical section 63 cause to impact and cause valve rod 61 that circular runout occurs, to improve the control accuracy of insert body 6.Its In, liquid chlorine cut-off sealing is realized by the cooperation between spool and U-shaped valve seat 4 in valve body 1, and the drive part of valve rod 61 is same Sample is susceptible to leakage, therefore inventor, in the upper surface fixed support body 11 of valve body 1, the upper end of supporter 11 is fixed with support Plate 13, the support plate 13 is for installing the driving parts such as cylinder, and the upper end of valve rod 61 is equipped with drive rod 9, and supporter 11 Middle part is equipped with cavity, filler 10 is filled in cavity, activity runs through cavity and support plate in supporter 11 to drive rod 9 successively It is upwardly extended after 13, until being connect with the output end of driving part, similarly, gasket 8 is installed in 11 lower end of supporter, it should Gasket 8 can be opened completely cutting off between the lower end and cavity of drive rod 9, by gasket 8 with filler 10 to the dual of drive rod Sealing can avoid leaking at driving part of the liquid chlorine through spool in valve body 1, also, in the company of support plate 13 and supporter 11 The place of connecing is equipped with axle sleeve 12, and 9 activity of drive rod runs through the axle sleeve 12, to ensure that drive rod 9 connects with driving part output end It can realize and pump under air-proof condition after connecing.And organ cover 32 is installed on 61 lower end outer wall of valve rod, the wind Qin cover 32 opens retaining hole 3 and the isolation of the inside of valve body 1, when valve rod 61 moves down, organ cover 32 compressed and with valve rod 61 together It moves down, and the spring 31 in retaining hole 3 is then using elastic force caused by the deformation of itself and deformation recovery to valve rod 61 movement tendency is into row buffering, to reduce impact of the valve rod 61 to 61 inner wall of retaining hole 3 and valve body, avoid valve rod 61 by It impacts and influences the sealing between conical section 63 and U-shaped valve seat 4.

The width of the fixture block 64 successively decreases downwards along the axis direction of the valve rod 61.Fixture block 64 and the cooperation of card slot 51 make It obtains conical section 63 and the contact area being connected between 5 wall of cavity increases, that is, increase the sealing effect of primary seal, while fixture block 64 Width successively decrease downwards along the axis direction of valve rod 61, similarly be connected to 5 wall of cavity on 51 groove width of card slot also along valve rod 61 Axis direction successively decreases downwards, i.e., can reduce the liquid chlorine residual quantity in card slot 51, and fixture block when being blocked to liquid chlorine runner 64 with the contact process of card slot 51, and the deformation quantity that fixture block 64 is squeezed and occurs can be gradually reduced in 51 groove width of card slot It is restricted in part, i.e., the interaction force between fixture block 64 and card slot 51 is passed along the axial direction directed downwardly of valve rod 61 Increase, and then increases the sealing effect of primary seal.

Preferably, the longitudinal cross-section of sealing ring 65 is U-shaped, i.e., in the folding process of valve rod 61, sealing ring 65 is gradual It is contacted with the lower ending opening of connection cavity 5, until card slot 51 agrees with completely with fixture block 64, valve rod 61 stops movement, seals at this time Ring 65 occurs certain deformation and realizes secondary seal to the lower end for being connected to cavity 5, and the sealing ring 65 that longitudinal cross-section is U-shaped with When connection cavity 5 occurs mutually to squeeze, the deformation of 65 outer circumference of sealing ring has certain deformation by its U-shaped part Space prevents the part for playing sealing function on sealing ring 65 not cause internal action stress concentration and be damaged, with true The stability of secondary seal is protected, while extending the service life of sealing ring 65.

Preferably, liquid chlorine has active chemical property, it is provided simultaneously with corrosivity, the general rubber as sealing medium Service life of the glue material under liquid chlorine environment is shorter, is susceptible to the phenomenon that hardening is cracked, and inventor selects polytetrafluoroethyl-ne Alkene material is as fixture block 64 and the raw material of sealing ring 65, using its good corrosion resistance, to ensure in control valve Ensure the stability of primary seal and secondary seal, while extending the service life of fixture block 64 and sealing ring 65, reduces control The frequency that valve inner part processed is replaced.

Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include Within protection scope of the present invention.

Claims

1. pneumatic control valve, including valve body (1) and spool, valve body (1) is interior to be provided with liquid chlorine runner, and valve body (1) both sides, which are equipped with, to be divided The import (2) and outlet (7) not being connected to liquid chlorine runner, the spool includes insert body (6) and matched U-shaped valve Seat (4), is horizontally arranged the middle part that U-shaped valve seat (4) is mounted on liquid chlorine runner, and the liquid chlorine runner is separated into the by U-shaped valve seat (4) One section of runner and second segment runner, the insert body (6) include valve rod (61) and be arranged at intervals on valve rod (61) two Sprue (62) is equipped with the conical section (63) that outer diameter successively decreases downwards along valve rod (61) axis direction, circle on sprue (62) lower face Cone section (63) is set on the outer circle wall of valve rod (61), and the U-shaped valve seat (4) is horizontal positioned, and the two of U-shaped valve seat (4) It is provided in a vertical section and conical section (63) is matched is connected to cavity (5), valve rod (61) runs through two connections vertically Cavity (5), it is characterised in that：It is circumferentially being equipped with multiple fixture blocks (64) on its external wall along the conical section (63), in connection chamber Multiple card slots (51) being adapted with the fixture block (64) are provided on body (5) inner wall, it is solid in the lower face of the conical section (63) There are sealing ring (65), the outer diameter of the sealing ring (65) to be more than the internal diameter of described connection cavity (5) lower ending opening surely；In valve body (1) upper end is equipped with supporter (11), and support plate (13) is fixed on supporter (11) upper surface, is provided in the middle part of supporter (11) Cavity is equipped with drive rod (9) in valve rod (61) upper end, and drive rod (9) activity is after the cavity, support plate (13) It upwardly extends, filler (10) is provided in the cavity, retreat stop block, the upper surface of retreat stop block are additionally provided with inside valve body (1) It is provided with the retaining hole (3) of face valve rod (61) lower end, spring (31) is installed in the retaining hole (3), in the valve rod (61) organ cover (32) is fixed on the outer wall of lower end, and the lower end of the organ cover (32) is connect with valve body (1) lower end inner wall.

2. pneumatic control valve according to claim 1, it is characterised in that：The width of the fixture block (64) is along the valve rod (61) axis direction successively decreases downwards.

3. pneumatic control valve according to claim 1, it is characterised in that：The longitudinal cross-section of the sealing ring (65) is water The U-shaped of placing flat.

4. pneumatic control valve according to claim 1, it is characterised in that：The fixture block (64) and sealing ring (65) are equal Using polytetrafluoroethylene (PTFE) material.