CN106195410A

CN106195410A - Pneumatic control valve

Info

Publication number: CN106195410A
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: 2016-12-07
Anticipated expiration: 2036-08-26
Also published as: CN106195410B

Abstract

The invention discloses pneumatic 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

Pneumatic control valve

Technical field

The present invention relates to the control valve of a kind of liquid chlorine filling system, specifically refer to pneumatic 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 pneumatic 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:

Pneumatic 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；Being provided with supporter in valve body upper end, gripper shoe is fixed on supporter upper surface, has cavity in the middle part of supporter, Be provided with drive rod in valve rod upper end, described drive rod activity upwardly extends after running through described cavity, gripper shoe, at described cavity Inside being provided with filler, be additionally provided with retreat stop block at valve inner, the upper surface of retreat stop block has just retaining hole to valve rod bottom, In described retaining hole, spring is installed, the outer wall of described valve rod lower end is fixed with under organ cover, and described organ cover End is connected with valve body lower end inwall.

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, in valve body, liquid chlorine cut-off is sealed and is realized by coordinating between spool with valve seat, and the drive division of valve rod Dividing and leakage the most easily occur, therefore inventor is fixed with support in the upper surface fixed support body of valve body, the upper end of supporter Plate, described gripper shoe 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 sky in the middle part of supporter Chamber, is filled with filler in cavity, drive rod activity successively upwardly extends after running through the cavity in supporter and gripper shoe, until Being connected with the outfan of driver part, similarly, be provided with sealing gasket in supporter lower end, this sealing gasket can be by drive rod Between lower end and cavity, isolation is opened, and by sealing gasket and the filler dual-seal to drive rod, can avoid the liquid chlorine warp in valve body Leak at the driver part of spool, and, axle sleeve is installed in the junction of gripper shoe Yu supporter, drive rod activity runs through institute State axle sleeve, to ensure that drive rod can realize pumping after being connected with driver part outfan under air-proof condition. And organ cover is installed on valve rod lower end outer wall, and retaining hole and valve inner isolation are opened by this organ cover, when valve rod moves down, Organ cover is compressed and is moved down in the lump with valve rod, is arranged on the spring in retaining hole and then utilizes the deformation of self and deformation to return The movement tendency of valve rod is buffered by multiple produced elastic force, to reduce valve rod to retaining hole and the impact of valve interior wall, The sealing avoiding valve rod to be impacted and to affect between conical section and valve seat.

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, 7-outlet, 8-sealing gasket, 9-drive rod, 10- Filler, 11-supporter, 12-axle sleeve, 13-gripper shoe.

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；On valve body 1 End is provided with supporter 11, and gripper shoe 13 is fixed on supporter 11 upper surface, has in the middle part of supporter 11, in valve rod 61 upper end Being provided with drive rod 9, the activity of described drive rod 9 upwardly extends after running through described cavity, gripper shoe 13, arranges in described cavity Having filler 10, be additionally provided with retreat stop block inside valve body 1, the upper surface of retreat stop block has just retaining hole 3 to valve rod 61 bottom, In described retaining hole 3, spring 31 is installed, the outer wall of described valve rod 61 lower end is fixed with organ cover 32, and described organ The lower end of cover 32 is connected with valve body 1 lower end inner wall.

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.

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 gripper shoe in the upper surface fixed support body 11 of valve body 1, the upper end of supporter 11 13, described gripper shoe 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 supporter 11 Portion is provided with cavity, is filled with filler 10 in cavity, and drive rod 9 is movable successively runs through the cavity in supporter 11 and gripper shoe 13 After upwardly extend, until being connected with the outfan of driver part, similarly, in supporter 11 lower end, sealing gasket 8 is installed, this is close Isolation between the lower end of drive rod 9 and cavity can be opened by packing 8, by dual close to drive rod of sealing gasket 8 and filler 10 Envelope, can avoid the liquid chlorine in valve body 1 to leak at the driver part of spool, and, in the connection of gripper shoe 13 with supporter 11 Place is provided with axle sleeve 12, and drive rod 9 activity runs through described axle sleeve 12, to ensure that drive rod 9 is being connected with driver part outfan After can realize pumping under air-proof condition.And organ cover 32 is installed on valve rod 61 lower end outer wall, this organ Internal to retaining hole 3 and valve body 1 isolation is opened by cover 32, when valve rod 61 moves down, organ cover 32 compressed and with valve rod 61 in the lump under Moving, the spring 31 being arranged in retaining hole 3 then utilizes elastic force produced by self deformation and deformation recovery to valve rod 61 Movement tendency 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 rushed Hit and affect the sealing between conical section 63 and valve seat 4.

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. pneumatic 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；Pacify in valve body (1) upper end Equipped with supporter (11), gripper shoe (13) is fixed on supporter (11) upper surface, has cavity, at valve at supporter (11) middle part Bar (61) upper end is provided with drive rod (9), and described drive rod (9) activity runs through described cavity, gripper shoe upwardly extends after (13), Being provided with filler (10) in described cavity, be additionally provided with retreat stop block in valve body (1) inside, 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 valve rod (61) lower end in described retaining hole (3) It is fixed with organ cover (32) on outer wall, and the lower end of described organ cover (32) is connected with valve body (1) lower end inner wall.

Pneumatic 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.

Pneumatic 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.

Pneumatic 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.