CN106286957A

CN106286957A - Through type control valve

Info

Publication number: CN106286957A
Application number: CN201610729246.1A
Authority: CN
Inventors: 师洪亮
Original assignee: CHENGDU OPTIMUX CONTROL VALVES & INSTRUMENT Co Ltd
Current assignee: Jiangsu Fuhua Valve Co ltd
Priority date: 2016-08-26
Filing date: 2016-08-26
Publication date: 2017-01-04
Anticipated expiration: 2036-08-26
Also published as: CN106286957B

Abstract

The invention discloses through type control valve, including valve body and spool, liquid chlorine runner is had in valve body, valve body both sides are provided with and the inlet and outlet of liquid chlorine flow passage, spool includes insert body and valve seat, the valve seat of horizontal positioned U-shaped is arranged on the middle part of liquid chlorine runner, described liquid chlorine channel partition is become first paragraph runner and second segment runner by valve seat, sprue lower surface is provided with external diameter conical section, two vertical sections of valve seat all have connection cavity, valve rod vertically runs through two connection cavitys, multiple fixture block it is being provided with on its external wall along conical section circumference, connection cavity inner wall has multiple draw-in groove, it is fixed with sealing ring in the lower surface of conical section.Reciprocating motion by valve rod in the vertical direction, the connection between liquid chlorine storage tank and transfer cask and opening and closing can be realized, and then quickly realize the accurate control of liquid chlorine flow during liquid chlorine filling, it is to avoid cause the leakage of liquid chlorine because of the damming not in time or damming low precision of liquid chlorine.

Description

Through type control valve

Technical field

The present invention relates to the control valve of a kind of liquid chlorine filling system, specifically refer to through type control valve.

Background technology

In chemical industry chlor-alkali production industry, product relates to the harmful influence such as liquid chlorine, and its sale is filled with the biggest difficulty, and Fill the most various complexity of formality；Owing to liquid chlorine has toxicity, easily gasifies, once reveal, process and the most maybe cannot locate During reason, will cause serious injury the person, thus cause serious accident, therefore it fills requirement strictly, safety guarantee Measure must be perfect.When liquefied chlorine cistern car is carried out, tank car pressure can rise with liquid chlorine temperature in tank car and increase, once hypertonia Tank car tank body just has the danger that blast occurs.Any liquid chloro container, its volumetric efficiency all must not exceed 80%, it is seen that liquid chlorine filling During accurate metering just seem particularly significant, safety factors to be considered, and as benefit unit, its measuring accuracy Also sales achievement it is directly connected to.But, the metering that fills of liquid chlorine is a complex process affected by many factors, as filled Error in dipping that the type selecting of device self and alignment error cause, fill pipeline gas-liquid two-phase and evacuate error in dipping, the ring caused Error in dipping, extraneous vibration that border temperature causes disturb the error etc. caused.Simultaneously for improving quantifying and loading metering benefit, reduce The lost on sale that error in dipping brings, selects and a kind of had not only had higher measuring accuracy, stability, but also compares proper measurement environment Mass flowmenter and i.e. open the quantitative controller i.e. stopped to improve safety, just seem necessary.

Summary of the invention

It is an object of the invention to provide through type control valve, it is ensured that the liquid chlorine flexible when filling, improve liquid chlorine Measuring accuracy.

The purpose of the present invention is achieved through the following technical solutions:

Through type control valve, including valve body and spool, has liquid chlorine runner in valve body, valve body both sides be provided with respectively with liquid chlorine runner The inlet and outlet of connection, described spool includes insert body and matched U-shaped valve seat, the valve seat of horizontal positioned U-shaped Being arranged on the middle part of liquid chlorine runner, described liquid chlorine channel partition is become first paragraph runner and second segment runner, described spool by valve seat Body includes valve rod and two sprues being disposed on valve rod, is provided with external diameter along valve rod axis direction on sprue lower surface The conical section successively decreased downwards, conical section is set on the outer circle wall of valve rod, described valve seat horizontal positioned, and at two of valve seat Vertically all having, in section, the connection cavity matched with conical section, valve rod vertically runs through two described connection cavitys, along described Conical section circumference is provided with multiple fixture block on its external wall, has, on connection cavity inner wall, the card that multiple and described fixture block adapts Groove, is fixed with sealing ring in the lower surface of described conical section, and the external diameter of described sealing ring is more than described connection cavity lower ending opening Internal diameter；Described valve rod is provided with two just to connection cavity lower ending opening baffle, described baffle epimere external diameter edge Described valve rod axis upwards successively decreases；Being provided with supporter in valve body upper end, housing is fixed on supporter upper surface, in supporter Portion has cavity, is provided with drive rod in valve rod upper end, and described drive rod activity upwardly extends after running through described cavity, housing, Being provided with filler in described cavity, be additionally provided with retreat stop block at valve inner, the upper surface of retreat stop block has just to valve rod lower end The retaining hole in portion, is provided with spring in described retaining hole, is fixed with organ cover on the outer wall of described valve rod lower end, and described The lower end of organ cover is connected with valve body lower end inwall, is fixed with cylinder, described cylinder outfan and drive rod at described housing Upper end connects, and the described straight external diameter of cylinder outfan is more than the external diameter of described drive rod, is provided with stroke in inner walls lower end Switch, described travel switch is corresponding with cylinder outfan lower surface, and travel switch is electrically connected with cylinder by controller.

For in prior art, control spool and the most easily occur damming inaccuracy and the leakage problem that causes, send out Bright existing spool is improved, on the premise of ensureing to control spool flexible, improve and control damming precisely of spool Degree, to ensure liquid chlorine measuring accuracy in filling process, what the loss reducing liquid chlorine improved liquid chlorine simultaneously fills efficiency；Use Time, in valve body, have liquid chlorine runner, and the valve seat horizontal positioned of U-shaped is arranged on the middle part of liquid chlorine runner so that entering of valve body Mouth is by two the connection cavitys being opened on valve seat and outlet, and before filling, conical section contacts, simultaneously with connection cavity wall Fixture block cooperates with draw-in groove so that two connection cavitys realize primary seal, and the sealing ring on conical section lower surface is then real Now connect the secondary seal of cavity lower ending opening, by primary seal and secondary seal so that liquid chlorine runner is insulated completely Become two parts, control spool to liquid chlorine storage tank and extraneous isolation effect to maintain；When filling, liquid chlorine is flowed into by import Between U-shaped valve base inner wall and import constitute first paragraph runner in, now stir valve rod so that conical section with connect cavity wall it Between be gradually disengaged, liquid chlorine then along connection cavity and conical section between gap enter into U-shaped valve seat outer wall and outlet between constitute Second segment runner in, eventually pass outlet and be injected in transfer cask body.By the reciprocating motion of valve rod in the vertical direction, i.e. Can realize the connection between liquid chlorine storage tank and transfer cask and opening and closing, and then quickly realize the essence of liquid chlorine flow during liquid chlorine filling Really control, it is to avoid cause the leakage of liquid chlorine, to reach to ensure that liquid chlorine exists because of the damming not in time or damming low precision of liquid chlorine Flexible when filling, improves the purpose of the measuring accuracy of liquid chlorine.

Wherein, valve rod moves until conical section with connect after cavity inner wall completely disengages from, liquid chlorine is quickly through connecting chamber Body is flowed in second segment runner by first paragraph runner, and now the liquid chlorine in first paragraph runner can be because of under connection cavity above End opening internal diameter is less and selects to be positioned at outflow in the connection cavity of lower section, and in first paragraph runner, the liquid chlorine of the overwhelming majority can be right The valve interior wall of the connection cavity lower ending opening being just pointed to lower section in second segment runner forms intense impact, can lead time serious Causing valve interior wall impaired by sharp impacts, inventor is provided with two on valve rod and just leads connection cavity lower ending opening Flow block, and the epimere external diameter of described baffle successively decreases upward along valve rod axis, i.e. the lower end at connection cavity forms a circular cone The guide face of shape so that the liquid chlorine in first paragraph runner is again divided into two plumes and goes out, i.e. first strand liquid chlorine is in the guiding of guide face Lower flow out along at connection cavity lower ending opening above, and second strand of liquid chlorine is along the connection cavity lower ending opening being positioned at lower section Place flows out, and second strand of liquid chlorine spreads apart to surrounding after flowing in second segment runner under the guiding of guide face, it is to avoid can To a little carrying out constant impingement on valve interior wall, and then reduce the loss percentage of valve interior wall, ensure by first paragraph runner simultaneously The flow branching in second segment runner two strands of liquid chlorines tends to balance, and the stress with two parts upper and lower in ensureing valve body is equal Weighing apparatus, it is to avoid the lower section excessive wear of valve interior wall and reduce its service life.

In valve body, liquid chlorine cut-off is sealed and is realized by coordinating between spool with valve seat, and the drive part of valve rod is same Leakage easily occur, therefore inventor is in the upper surface fixed support body of valve body, and the upper end of supporter is fixed with housing, described shell Body is used for installing the driver parts such as cylinder, and the upper end of valve rod is provided with drive rod, and is provided with cavity in the middle part of supporter, fills out in cavity Be filled with filler, drive rod successively movable run through the cavity in supporter and housing after upwardly extend, until with driver part Outfan connects, and similarly, is provided with sealing gasket in supporter lower end, this sealing gasket can by the lower end of drive rod and cavity it Between completely cut off and open, by sealing gasket and the filler dual-seal to drive rod, the liquid chlorine in valve body can be avoided through the drive division of spool Leak at part, and, axle sleeve is installed in the junction of housing Yu supporter, drive rod activity runs through described axle sleeve, to ensure Drive rod can realize pumping after being connected with driver part outfan under air-proof condition.And outside valve rod lower end Being provided with organ cover on wall, the isolation of retaining hole and valve inner is opened by this organ cover, when valve rod moves down, organ cover compressed and Move down in the lump with valve rod, be arranged on the spring in retaining hole and then utilize elastic force produced by self deformation and deformation recovery The movement tendency of valve rod is buffered, to reduce valve rod to retaining hole and the impact of valve interior wall, it is to avoid valve rod is rushed The sealing hit and affect between conical section and valve seat.Further, being provided with cylinder in housing, the outfan of cylinder is by driving Lever is connected with valve rod, i.e. cylinder outfan pump can drive conical section to connection cavity seal or Open, wherein the external diameter of cylinder outfan is more than the external diameter of drive rod, and is provided with in housing and cylinder outfan lower surface Just to travel switch, and cylinder outfan lower surface is to the reciprocating motion of the vertical dimension between housing lower end inner wall with spool Maximum displacement identical, i.e. spool to connection cavity seal time, cylinder outfan is displaced downwardly to contact with travel switch, OK Cheng Kaiguan transfers data to controller, controller send control command to cylinder, and cylinder stops moving down, and i.e. ensures circular cone Section agree with perfection connect cavity, it is to avoid excessively moving down of cylinder outfan and cause conical section to connection cavity formation rush Hit, reduce valve seat or the degree of injury of spool, extend the service life of valve inner component.

The width of described fixture block successively decreases downwards along the axis direction of described valve rod.Fixture block coordinates so that conical section with draw-in groove Increasing with the contact area connected between cavity wall, i.e. increase the sealing effectiveness of primary seal, the width of fixture block is along valve rod simultaneously Axis direction successively decrease downwards, similarly connection cavity wall on draw-in groove groove width also successively decrease downwards along the axis direction of valve rod, i.e. Can reduce the liquid chlorine residual quantity in draw-in groove when liquid chlorine runner is blocked, and fixture block with in the contact process of draw-in groove, The deformation quantity that fixture block is squeezed and occurs can be restricted in the part that draw-in groove groove width is gradually reduced, i.e. fixture block and draw-in groove it Between interaction force be incremented by along valve rod axially direction the most down, and then increase the sealing effectiveness of primary seal.

The longitudinal cross-section of described sealing ring is the U-shaped of horizontal positioned.As preferably, the longitudinal cross-section of sealing ring is U-shaped, i.e. In the folding process of valve rod, sealing ring gradually contacts with the lower ending opening connecting cavity, until draw-in groove agrees with completely with fixture block, Valve rod stops mobile, and now sealing ring occurs certain deformation that the lower end connecting cavity realizes secondary seal, and longitudinal cross-section For U-shaped sealing ring with connect cavity occur mutually extrude time, the deformation of sealing ring outer circumference divided by its U-shaped portion and Possess certain deformation space, i.e. prevent the part playing sealing function on sealing ring not result in internal action stress and concentrate And impaired, to guarantee the stability of secondary seal, extend the service life of sealing ring simultaneously.

Described fixture block and sealing ring all use politef material.As preferably, liquid chlorine possesses active chemical Matter, is provided simultaneously with corrosivity, and the general elastomeric material as sealing medium is shorter, easily for the service life under liquid chlorine environment The phenomenon of hardening cracking occurs, and inventor selects politef material as fixture block and the raw material of sealing ring, utilizes Its good decay resistance, to ensure to ensure primary seal and the stability of secondary seal in control valve, extends simultaneously Fixture block and the service life of sealing ring, reduce the frequency that control valve inner part is changed.

The present invention compared with prior art, has such advantages as and beneficial effect:

1, the present invention reciprocating motion by valve rod in the vertical direction, can realize the connection between liquid chlorine storage tank and transfer cask With opening and closing, and then quickly realize the accurate control of liquid chlorine flow during liquid chlorine filling, it is to avoid because of liquid chlorine dam not in time or It is to dam low precision and cause the leakage of liquid chlorine, to reach to ensure the liquid chlorine flexible when filling, improves the metering of liquid chlorine The purpose of precision；

2, the draw-in groove groove width on the connection cavity wall of the present 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 draw-in groove when blocking, and fixture block is with the contact process of draw-in groove, fixture block is squeezed And the deformation quantity occurred can be restricted in the part that draw-in groove groove width is gradually reduced, i.e. interaction between fixture block and draw-in groove Power is being incremented by along the axial direction the most down of valve rod, and then increases the sealing effectiveness of primary seal；

3, the present invention selects politef material as fixture block and the raw material of sealing ring, utilizes the corrosion resistance that it is good Can, to ensure to ensure primary seal and the stability of secondary seal in control valve, extend fixture block and sealing ring simultaneously In service life, reduce the frequency that control valve inner part is changed.

Accompanying drawing explanation

Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:

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

Fig. 2 is the structural representation of insert body.

Labelling and corresponding parts title in accompanying drawing:

1-valve body, 2-import, 3-retaining hole, 31-spring, 32-organ cover, 4-valve seat, 5-connect cavity, 51-draw-in groove, 6-spool Body, 61-valve rod, 62-sprue, 63-conical section, 64-fixture block, 65-sealing ring, 66-baffle, 7-outlet, 8-sealing gasket, 9- Drive rod, 10-filler, 11-supporter, 12-axle sleeve, 13-housing, 14-cylinder, 15-travel switch.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof 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, has liquid chlorine runner in valve body 1, and valve body 1 both sides are provided with Respectively with the import 2 of liquid chlorine flow passage and outlet 7, described spool includes insert body 6 and matched U-shaped valve seat 4, The valve seat 4 of horizontal positioned U-shaped is arranged on the middle part of liquid chlorine runner, valve seat 4 described liquid chlorine channel partition is become first paragraph runner and Second segment runner, described insert body 6 includes valve rod 61 and two sprues 62 being disposed on valve rod 61, sprue 62 times End face is provided with the conical section 63 that external diameter successively decreases downwards along valve rod 61 axis direction, and conical section 63 is set in the excircle of valve rod 61 On wall, described valve seat 4 horizontal positioned, and in two vertical sections of valve seat 4, all have the connection chamber matched with conical section 63 Body 5, valve rod 61 vertically runs through two described connection cavitys 5, is being provided with multiple card on its external wall along described conical section 63 circumference Block 64, has the draw-in groove 51 that multiple and described fixture block 64 adapts, in the lower end of described conical section 63 on connection cavity 5 inwall Face is fixed with sealing ring 65, and the external diameter of described sealing ring 65 is more than the internal diameter of described connection cavity 5 lower ending opening；At described valve rod 61 be provided with two just to connection cavity 5 lower ending opening baffle 66, described baffle 66 epimere external diameter is along described valve rod 61 Axis upwards successively decreases.；Being provided with supporter 11 in valve body 1 upper end, housing 13 is fixed on supporter 11 upper surface, at supporter 11 Middle part has, and is provided with drive rod 9 in valve rod 61 upper end, the activity of described drive rod 9 run through described cavity, housing 13 backward on prolong Stretching, be provided with filler 10 in described cavity, be additionally provided with retreat stop block inside valve body 1, the upper surface of retreat stop block has just to valve The retaining hole 3 of bar 61 bottom, is provided with spring 31 in described retaining hole 3, fixing on the outer wall of described valve rod 61 lower end There is organ cover 32, and the lower end of described organ cover 32 be connected with valve body 1 lower end inner wall, is fixed with cylinder 14 at described housing 13, Described cylinder 14 outfan is connected with the upper end of drive rod 9, and the straight external diameter of described cylinder 14 outfan is more than described drive rod 9 External diameter, is provided with travel switch 15 in housing 13 inwall lower end, and described travel switch 5 is corresponding with cylinder 14 outfan lower surface, And travel switch 15 is electrically connected with cylinder 14 by controller.

For in prior art, control spool and the most easily occur damming inaccuracy and the leakage problem that causes, send out Bright existing spool is improved, on the premise of ensureing to control spool flexible, improve and control damming precisely of spool Degree, to ensure liquid chlorine measuring accuracy in filling process, what the loss reducing liquid chlorine improved liquid chlorine simultaneously fills efficiency；Use Time, in valve body 1, have liquid chlorine runner, and valve seat 4 horizontal positioned of U-shaped is arranged on the middle part of liquid chlorine runner so that valve body 1 Import 2 is connected with exporting 7 by be opened on valve seat 4 two connection cavitys 5, before filling, conical section 63 with connect cavity 5 wall Contact, fixture block 64 cooperates with draw-in groove 51 simultaneously so that two connect cavitys 5 and realize primary seal, and conical section 63 lower end Sealing ring 65 on face then realizes connecting the secondary seal of cavity 5 lower ending opening, by primary seal and secondary seal so that Liquid chlorine runner is insulated into two parts completely, controls spool to liquid chlorine storage tank and extraneous isolation effect to maintain；When filling, Liquid chlorine is flowed between U-shaped valve seat 4 inwall and import 2 in the first paragraph runner constituted by import 2, now stirs valve rod 61, Making conical section 63 and be gradually disengaged between cavity 5 wall with connecting, liquid chlorine then enters along the gap between connection cavity 5 and conical section 63 Enter in the second segment runner constituted between U-shaped valve seat 4 outer wall and outlet 7, eventually pass outlet 7 and be injected in transfer cask body. By the reciprocating motion of valve rod 61 in the vertical direction, the connection between liquid chlorine storage tank and transfer cask and opening and closing can be realized, enter And the accurate of liquid chlorine flow controls during quickly realizing liquid chlorine filling, it is to avoid damming not in time or damming precision because of liquid chlorine Differ from and cause the leakage of liquid chlorine, to reach to ensure the liquid chlorine flexible when filling, improve the purpose of the measuring accuracy of liquid chlorine.

Wherein, valve rod 61 moves until conical section 63 with connect after cavity 5 inwall completely disengages from, liquid chlorine is quickly through company Cavity body 5 is flowed in second segment runner by first paragraph runner, and now the liquid chlorine in first paragraph runner can be because of connection above Cavity 5 lower ending opening internal diameter is less and selects to be positioned at outflow in the connection cavity 5 of lower section, and the overwhelming majority in first paragraph runner Liquid chlorine can form intense impact to valve body 1 inwall of connection cavity 5 lower ending opening being just pointed to lower section in second segment runner, Valve body 1 inwall can be caused impaired by sharp impacts time serious, inventor is provided with two just to connection chamber on valve rod 61 The baffle 66 of body 5 lower ending opening, and the epimere external diameter of described baffle 66 successively decreases upward along valve rod 61 axis, i.e. in connection chamber The lower end of body 5 forms a cone shape guide face so that the liquid chlorine in first paragraph runner is again divided into two plumes and goes out, and i.e. first Stock liquid chlorine flows out under the guiding of guide face at connection cavity 5 lower ending opening above, and second strand of liquid chlorine is along being positioned at Flow out at connection cavity 5 lower ending opening of lower section, and second burst of liquid chlorine leading at guide face after flowing in second segment runner Draw and lower spread apart to surrounding, it is to avoid to a little carrying out constant impingement on valve body 1 inwall, and then being subject to of valve body 1 inwall can be reduced Loss rate, ensures that the flow being branched to two strands of liquid chlorines in second segment runner by first paragraph runner tends to balance, to ensure valve simultaneously The stress equalization of upper and lower two parts in body 1, it is to avoid the lower section excessive wear of valve body 1 inwall and reduce its service life.

Further, being additionally provided with retreat stop block inside valve body 1, the upper surface of retreat stop block has just retaining hole to valve rod 61 3, during valve rod 61 moves down, the end of valve rod 61 can move along a straight line along retaining hole 3, it is to avoid liquid chlorine when filling to valve Bar 61 and conical section 63 impact and cause valve rod 61 that circular runout occurs, to improve the control accuracy of insert body 6.Its In, in valve body 1, liquid chlorine cut-off is sealed and is realized by coordinating between spool with valve seat 4, and the drive part of valve rod 61 is same Leakage easily occur, therefore inventor is fixed with housing in the upper surface fixed support body 11 of valve body 1, the upper end of supporter 11 13, described housing 13 is used for installing the driver parts such as cylinder, and the upper end of valve rod 61 is provided with drive rod 9, and in the middle part of supporter 11 Being provided with cavity, be filled with filler 10 in cavity, activity runs through the cavity in supporter 11 to drive rod 9 and housing 13 is backward successively Upper extension, until being connected with the outfan of driver part, similarly, is provided with sealing gasket 8 in supporter 11 lower end, this sealing gasket Isolation between the lower end of drive rod 9 and cavity can be opened by 8, by sealing gasket 8 and the filler 10 dual-seal to drive rod, and can The liquid chlorine in valve body 1 is avoided to leak at the driver part of spool, and, it is provided with in the junction of housing 13 with supporter 11 Axle sleeve 12, drive rod 9 activity runs through described axle sleeve 12, to ensure that drive rod 9 can be after being connected with driver part outfan Realize under air-proof condition pumping.And organ cover 32 is installed on valve rod 61 lower end outer wall, this organ cover 32 will be only Moving back hole 3 isolation internal with valve body 1 to open, when valve rod 61 moves down, organ cover 32 is compressed and is moved down in the lump with valve rod 61, and installs Spring 31 in retaining hole 3 then utilizes the elastic force movement tendency to valve rod 61 produced by self deformation and deformation recovery Buffer, to reduce valve rod 61 to retaining hole 3 and the impact of valve body 61 inwall, it is to avoid valve rod 61 is impacted and affects circle Sealing between cone section 63 and valve seat 4.Being provided with cylinder 14 in housing 13, the outfan of cylinder 14 passes through drive rod 9 and valve Bar 61 connects, i.e. cylinder 14 outfan pump can drive conical section 63 to connection cavity 5 seal or Open, wherein the external diameter of cylinder 14 outfan is more than the external diameter of drive rod 9, and is provided with in housing 13 and cylinder 14 outfan Lower surface just to travel switch 15, and cylinder 14 outfan lower surface is to the vertical dimension between housing 13 lower end inner wall and valve The reciprocating maximum displacement of core is identical, i.e. spool to connection cavity 5 seal time, cylinder 14 outfan be displaced downwardly to Travel switch 15 contacts, and travel switch 15 transfers data to controller, controller send control command to cylinder 14, gas Cylinder 14 stop move down, i.e. ensure conical section 63 agree with the perfection connecting cavity 5, it is to avoid excessively moving down of cylinder 14 outfan and Cause conical section 63 that connection cavity 5 is formed impact, reduce valve seat 4 or the degree of injury of spool, extend valve body 1 internals Service life.

The width of described fixture block 64 successively decreases downwards along the axis direction of described valve rod 61.Fixture block 64 made with coordinating of draw-in groove 51 Obtain conical section 63 and the contact area connected between cavity 5 wall increases, i.e. increase the sealing effectiveness of primary seal, simultaneously fixture block 64 Width successively decrease downwards along the axis direction of valve rod 61, similarly draw-in groove 51 groove width on connection cavity 5 wall is also along valve rod 61 Axis direction successively decreases downwards, i.e. can reduce the liquid chlorine residual quantity in draw-in groove 51, and fixture block when blocking liquid chlorine runner 64 with the contact process of draw-in groove 51, and the deformation quantity that fixture block 64 is squeezed and occurs can be gradually reduced in draw-in groove 51 groove width Be restricted in part, i.e. interaction force between fixture block 64 and draw-in groove 51 is being passed along the axial direction the most down of valve rod 61 Increase, and then increase the sealing effectiveness of primary seal.

As preferably, the longitudinal cross-section of sealing ring 65 is U-shaped, and i.e. in the folding process of valve rod 61, sealing ring 65 is gradually Contacting with the lower ending opening of connection cavity 5, until draw-in groove 51 agrees with completely with fixture block 64, valve rod 61 stops mobile, now seals There is certain deformation and the lower end of connection cavity 5 realized secondary seal in ring 65, and the sealing ring 65 that longitudinal cross-section is U-shaped with When connection cavity 5 occurs mutually to extrude, the deformation of sealing ring 65 outer circumference is divided by its U-shaped portion and possesses certain deformation Space, i.e. prevent the part playing sealing function on sealing ring 65 do not result in internal action stress concentrate and impaired, with really Protect the stability of secondary seal, extend the service life of sealing ring 65 simultaneously.

As preferably, liquid chlorine possesses active chemical property, is provided simultaneously with corrosivity, the general rubber as sealing medium Glue material is shorter for the service life under liquid chlorine environment, the phenomenon of hardening cracking easily occurs, and inventor selects polytetrafluoroethyl-ne Alkene material, as fixture block 64 and the raw material of sealing ring 65, utilizes the decay resistance that it is good, to ensure in control valve Ensure primary seal and the stability of secondary seal, extend fixture block 64 and the service life of sealing ring 65 simultaneously, reduce control The frequency that valve inner part processed is changed.

Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise Within protection scope of the present invention.

Claims

1. through type control valve, including valve body (1) and spool, has liquid chlorine runner in valve body (1), valve body (1) both sides are provided with point Not with the import (2) of liquid chlorine flow passage and export (7), it is characterised in that: described spool includes insert body (6) and therewith The U-shaped valve seat (4) coordinated, the valve seat (4) of horizontal positioned U-shaped is arranged on the middle part of liquid chlorine runner, and described liquid chlorine is led to by valve seat (4) Road is separated into first paragraph runner and second segment runner, and described insert body (6) includes valve rod (61) and is disposed on valve rod (61) two sprues (62) on, are provided with the circle that external diameter successively decreases downwards along valve rod (61) axis direction on sprue (62) lower surface Cone section (63), conical section (63) is set on the outer circle wall of valve rod (61), described valve seat (4) horizontal positioned, and in valve seat (4) Two vertical sections on all have the connection cavity (5) matched with conical section (63), valve rod (61) vertically runs through described in two Connection cavity (5), is being provided with multiple fixture block (64) on its external wall along described conical section (63) circumference, in connection cavity (5) Have multiple draw-in groove (51) adapted with described fixture block (64) on wall, be fixed with sealing in the lower surface of described conical section (63) Ring (65), the external diameter of described sealing ring (65) is more than the internal diameter of described connection cavity (5) lower ending opening；On described valve rod (61) Be provided with two just to connection cavity (5) lower ending opening baffle (66), described baffle (66) epimere external diameter is along described valve rod (61) axis upwards successively decreases；Be provided with supporter (11) in valve body (1) upper end, housing (13) is fixed on supporter (11) upper end Face, has cavity at supporter (11) middle part, is provided with drive rod (9) in valve rod (61) upper end, and described drive rod (9) activity is passed through Wear described cavity, housing upwardly extends after (13), is provided with filler (10) in described cavity, is additionally provided with in valve body (1) inside Retreat stop block, the upper surface of retreat stop block has just retaining hole (3) to valve rod (61) bottom, installs in described retaining hole (3) There is spring (31), the outer wall of described valve rod (61) lower end is fixed with organ cover (32), and the lower end of described organ cover (32) It is connected with valve body (1) lower end inner wall, is fixed with cylinder (14), described cylinder (14) outfan and drive rod at described housing (13) (9) upper end connects, and the straight external diameter of described cylinder (14) outfan is more than the external diameter of described drive rod (9), in housing (13) Wall lower end is provided with travel switch (15), and described travel switch (5) is corresponding with cylinder (14) outfan lower surface, and travel switch (15) electrically connected with cylinder (14) by controller.

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

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

Through type control valve the most according to claim 1, it is characterised in that: described fixture block (64) and sealing ring (65) are equal Use politef material.