CN206409649U - Control valve for liquid chlorine filling system zero leakage - Google Patents

Abstract

The utility model discloses the control valve for liquid chlorine filling system zero leakage, including valve body and valve element, liquid chlorine runner is provided with valve body, valve body both sides are provided with the inlet and outlet with liquid chlorine flow passage, valve element includes insert body and valve seat, the valve seat of horizontal positioned U-shaped is arranged on the middle part of liquid chlorine runner, valve seat is by the liquid chlorine channel partition into first paragraph runner and second segment runner, external diameter conical section is provided with sprue lower surface, connection cavity is provided with two vertical sections of valve seat, valve rod is vertically through two connection cavitys, multiple fixture blocks are being provided with its external wall along conical section is circumferential, multiple necks are provided with connection cavity inner wall, sealing ring is fixed with the lower surface 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 achieved, 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 low precision that dams not in time or dam of liquid chlorine.

Description

Control valve for liquid chlorine filling system zero leakage

Technical field

The utility model is related to a kind of control valve of liquid chlorine filling system, specifically refers to let out for liquid chlorine filling system zero The control valve of leakage.

Background technology

In chemical industry chlor-alkali production industry, product is related to the harmful influences such as liquid chlorine, and its sale is filled with very big difficulty, and Fill the very various complexity of formality；Because liquid chlorine has toxicity, easily gasification, once revealing, handle not in time or can not locate During reason, the person will be caused serious injury, so that trigger 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 and increase with liquid chlorine temperature in tank car, once hypertonia Tank car tank body just has the danger exploded.Any liquid chloro container, its volumetric efficiency must not exceed 80%, it is seen that liquid chlorine filling During accurate metering just seem particularly significant, not only to consider safety factor, and be used as benefit unit, its measuring accuracy Also it is directly connected to sales achievement.However, the metering that fills of liquid chlorine is a complex process affected by many factors, such as fill Error in dipping caused by the type selecting and alignment error of device itself, fill pipeline gas-liquid two-phase evacuate caused by error in dipping, ring Error in dipping, the caused error of extraneous vibration interference etc. caused by the temperature of border.Simultaneously to improve quantifying and loading metering benefit, reduce The lost on sale that error in dipping is brought, had not only been had higher measuring accuracy, stability but also is compared proper measurement environment from a kind of Mass flowmenter and open the quantitative controller that stops and seem necessary to improve security, just.

Utility model content

The purpose of this utility model is to provide the control valve for liquid chlorine filling system zero leakage, it is ensured that liquid chlorine is being filled When flexible modulation, improve liquid chlorine measuring accuracy.

The purpose of this utility model is achieved through the following technical solutions：

For the control valve of liquid chlorine filling system zero leakage, including valve body and valve element, liquid chlorine runner, valve body are provided with valve body Both sides include insert body and matched U-shaped provided with inlet and outlet respectively with liquid chlorine flow passage, the valve element Valve seat, the valve seat of horizontal positioned U-shaped is arranged on the middle part of liquid chlorine runner, and valve seat is by the liquid chlorine channel partition into first paragraph runner With second segment runner, the insert body includes valve rod and two sprues being disposed on valve rod, on sprue lower surface The conical section successively decreased downwards along valve rod axis direction provided with external diameter, conical section is set on the outer circle wall of valve rod, the valve seat Horizontal positioned, and the connection cavity being engaged with conical section is provided with two vertical sections of valve seat, valve rod runs through two vertically The individual connection cavity, is being provided with multiple fixture blocks along the conical section is circumferential, is being provided with connection cavity inner wall on its external wall Multiple necks being adapted with the fixture block, sealing ring, the external diameter of the sealing ring are fixed with the lower surface of the conical section More than the internal diameter of the connection cavity lower ending opening；Supporter is installed in valve body upper end, supporting plate is fixed on supporter upper end Face, is provided with cavity in the middle part of supporter, and drive rod is provided with valve rod upper end, and the drive rod activity runs through the cavity, branch Upwardly extended after fagging, filler is provided with the cavity, retreat stop block is additionally provided with valve inner, the upper surface of retreat stop block is opened There is the retaining hole just to valve rod bottom.

For in the prior art, easily there is leakage problem caused by damming inaccurately, hair when in use in control valve element It is bright that existing valve element is improved, on the premise of control valve element flexible modulation is ensured, improve damming precisely for control valve element Degree, to ensure measuring accuracy of the liquid chlorine in filling process, what the loss for reducing liquid chlorine improved liquid chlorine simultaneously fills efficiency；Use When, it is provided with liquid chlorine runner in valve body, and the valve seat horizontal positioned of U-shaped is arranged on the middle part of liquid chlorine runner so that valve body enters Mouth is by the two connection cavitys and outlet that are opened on valve seat, and before filling, conical section is contacted with connection cavity wall, simultaneously Fixture block cooperates with neck so that two connection cavitys realize primary seal, and the sealing ring on conical section lower surface is then real The secondary seal of cavity lower ending opening is now connected, passes through primary seal and secondary seal so that liquid chlorine runner is insulated completely Into two parts, to maintain to control valve element to liquid chlorine storage tank and extraneous isolation effect；When filling, liquid chlorine is flowed into by import In the first paragraph runner constituted between U-shaped valve base inner wall and import, 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 U-shaped valve seat outer wall and outlet between constitute Second segment runner in, eventually pass outlet and be injected into transfer cask body.By the reciprocating motion of valve rod in the vertical direction, i.e., The connection and opening and closing between liquid chlorine storage tank and transfer cask can be achieved, and then quickly realizes the essence of liquid chlorine flow during liquid chlorine filling Really control, it is to avoid cause the leakage of liquid chlorine because of the low precision that dams not in time or dam of liquid chlorine, ensures that liquid chlorine exists to reach 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 valve element and valve seat in valve body, and the drive division of valve rod Divide and equally easily leak, therefore inventor, in the upper surface fixed support body of valve body, the upper end of supporter is fixed with support Plate, the supporting plate is used to install the driving parts such as cylinder, and the upper end of valve rod is provided with drive rod, and provided with sky in the middle part of supporter Filler is filled with chamber, cavity, drive rod is upwardly extended after activity runs through the cavity in supporter and supporting plate successively, until It is connected with the output end of driving part, similarly, sealing gasket is installed in supporter lower end, the sealing gasket can be by drive rod Isolation is opened between lower end and cavity, by sealing gasket and dual-seal of the filler to drive rod, the liquid chlorine in valve body can be avoided to pass through Leaked at the driving part of valve element, also, axle sleeve is installed in the junction of supporting plate and supporter, drive rod activity is through institute Axle sleeve is stated, is pumped with ensureing drive rod can be realized after being connected with driving part output end under air-proof condition.

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

The longitudinal cross-section of the sealing ring is the U-shaped of horizontal positioned.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 connecting the lower ending opening of cavity, until neck agrees with completely with fixture block, Valve rod stops movement, and now sealing ring occurs certain deformation and secondary seal is realized to the lower end for connecting cavity, and longitudinal cross-section For U-shaped sealing ring when occurring mutual extruding with connecting cavity, the deformation of sealing ring outer circumference is by its U-shaped portion point Possess certain deformation space, that is, prevent the part for playing sealing function on sealing ring not result in 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 use polytetrafluoroethylene (PTFE) material.Preferably, liquid chlorine possess it is active chemically Matter, is provided simultaneously with corrosivity, and service life of the elastomeric material as sealing medium typically under liquid chlorine environment is shorter, easily There is the phenomenon of hardening cracking, and inventor is used as fixture block and the raw material of sealing ring, utilization from polytetrafluoroethylene (PTFE) material Its good decay resistance, to ensure the stability for ensureing primary seal and secondary seal in control valve, extends simultaneously The service life of fixture block and sealing ring, the frequency that reduction control valve inner part is changed.

The utility model compared with prior art, has the following advantages and advantages：

1st, the reciprocating motion that the utility model passes through valve rod in the vertical direction, you can realize liquid chlorine storage tank and transfer cask it Between connection and opening and closing, and then the quick accurate control for realizing liquid chlorine flow during liquid chlorine filling, it is to avoid because of damming for liquid chlorine Not in time or dam low precision and cause the leakage of liquid chlorine, to reach the flexible modulation for ensureing liquid chlorine when filling, improve liquid The purpose of the measuring accuracy of chlorine；

2nd, the neck groove width on connection cavity wall of the present utility model is also successively decreased downwards along the axis direction of valve rod, i.e., right Liquid chlorine runner can reduce the liquid chlorine residual quantity in neck when being blocked, and fixture block is in the contact process with neck, fixture block The deformation quantity for being squeezed and occurring can be restricted in the part that neck groove width is gradually reduced, i.e., between fixture block and neck Interaction force is being incremented by along along valve rod axially direction directed downwardly, and then increases the sealing effectiveness of primary seal；

3rd, the utility model from polytetrafluoroethylene (PTFE) material as fixture block and the raw material of sealing ring, it is good using it Decay resistance, to ensure the stability for ensureing primary seal and secondary seal in control valve, while extend fixture block and The service life of sealing ring, the frequency that reduction control valve inner part is changed.

Brief description of the drawings

Accompanying drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation of insert body.

Mark and corresponding parts title in accompanying drawing：

1- valve bodies, 2- imports, 3- retainings hole, 4- valve seats, 5- connection cavity, 51- necks, 6- insert bodies, 61- valve rods, 62- sprues, 63- conical sections, 64- fixture blocks, 65- sealing rings, 7- outlets, 8- sealing gaskets, 9- drive rods, 10- fillers, 11- support Body, 12- axle sleeves, 13- supporting plates.

Embodiment

For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing, The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this Utility model, is not intended as limiting of the present utility model.

Embodiment 1

As depicted in figs. 1 and 2, the present embodiment includes being provided with liquid chlorine runner, the both sides of valve body 1 in valve body 1 and valve element, valve body 1 Provided with import 2 and outlet 7 respectively with liquid chlorine flow passage, the valve element 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, and valve seat 4 is by the liquid chlorine channel partition into first paragraph stream Road and second segment runner, the insert body 6 include valve rod 61 and two sprues 62 being disposed on valve rod 61, in sprue 62 lower surfaces are provided with the conical section 63 that external diameter successively decreases downwards along the axis direction of valve rod 61, and conical section 63 is set in the outer of valve rod 61 In circumferential wall, the horizontal positioned of valve seat 4, and the company being engaged with conical section 63 is provided with two vertical sections of valve seat 4 Cavity body 5, valve rod 61 is vertically through two connection cavitys 5, circumferential on its external wall provided with many along the conical section 63 Individual fixture block 64, is provided with multiple necks 51 being adapted with the fixture block 64, in the conical section 63 on the connection inwall of cavity 5 Lower surface is fixed with sealing ring 65, and the external diameter of the sealing ring 65 is more than the internal diameter of the connection lower ending opening of cavity 5；In valve body 1 upper end is provided with supporter 11, and supporting plate 13 is fixed on the upper surface of supporter 11, is provided with the middle part of supporter 11, in valve rod 61 Upper end is provided with drive rod 9, and the activity of drive rod 9 is upwardly extended after running through the cavity, supporting plate 13, in the cavity Filler 10 is provided with, retreat stop block is additionally provided with inside valve body 1, the upper surface of retreat stop block is provided with the retaining just to the bottom of valve rod 61 Hole 3.

For in the prior art, easily there is leakage problem caused by damming inaccurately, hair when in use in control valve element It is bright that existing valve element is improved, on the premise of control valve element flexible modulation is ensured, improve damming precisely for control valve element Degree, to ensure measuring accuracy of the liquid chlorine in filling process, what the loss for reducing liquid chlorine improved liquid chlorine simultaneously fills efficiency；Use When, liquid chlorine runner is provided with valve body 1, and the horizontal positioned of valve seat 4 of U-shaped is arranged on the middle part of liquid chlorine runner so that valve body 1 Import 2 is connected by two connection cavitys 5 being opened on valve seat 4 with outlet 7, and before filling, conical section 63 is with connecting the wall of cavity 5 Contact, while fixture block 64 cooperates with neck 51 so that two connect cavitys 5 and realize primary seal, and the lower end of conical section 63 Sealing ring 65 on face then realizes the secondary seal of the connection lower ending opening of cavity 5, passes through primary seal and secondary seal so that Liquid chlorine runner is insulated into two parts completely, to maintain to control valve element to liquid chlorine storage tank and extraneous isolation effect；When filling, Liquid chlorine is flowed into the first paragraph runner constituted between the inwall of U-shaped valve seat 4 and import 2 by import 2, now stirs valve rod 61, So that conical section 63 is gradually disengaged between the wall of cavity 5 with connecting, liquid chlorine then enters along the gap between connection cavity 5 and conical section 63 Enter into the second segment runner constituted between the outer wall of U-shaped valve seat 4 and outlet 7, eventually pass outlet 7 and be injected into transfer cask body. Pass through the reciprocating motion of the in the vertical direction of valve rod 61, you can realize the connection and opening and closing between liquid chlorine storage tank and transfer cask, enter And quickly realize the accurate control of liquid chlorine flow during liquid chlorine filling, it is to avoid because of the precision of damming not in time or dam of liquid chlorine Difference and cause the leakage of liquid chlorine, ensure flexible modulation of the liquid chlorine when filling to reach, improve the purpose of the measuring accuracy of liquid chlorine.

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 just to valve rod 61 3, during valve rod 61 is moved down, the end of valve rod 61 can move along a straight line along retaining hole 3, it is to avoid liquid chlorine is when filling to valve Bar 61 and conical section 63 impact and cause valve rod 61 to occur circular runout, to improve the control accuracy of insert body 6.Its In, liquid chlorine cut-off sealing is realized by the cooperation between valve element and valve seat 4 in valve body 1, and the drive part of valve rod 61 is same Easily leak, therefore inventor, in the upper surface fixed support body 11 of valve body 1, the upper end of supporter 11 is fixed with supporting plate 13, the supporting plate 13 is used to install the driving parts such as cylinder, and the upper end of valve rod 61 is provided with drive rod 9, and in supporter 11 Portion, which is provided with cavity, cavity, is filled with filler 10, the cavity that activity runs through in supporter 11 successively of drive rod 9 and supporting plate 13 After upwardly extend, until be connected with the output end of driving part, similarly, sealing gasket 8 is installed in the lower end of supporter 11, this is close Packing 8 can open isolation between the lower end of drive rod 9 and cavity, by sealing gasket 8 with filler 10 to the dual close of drive rod Envelope, can avoid leaking at driving part of the liquid chlorine through valve element in valve body 1, also, in the connection of supporting plate 13 and supporter 11 Place is provided with axle sleeve 12, and the activity of drive rod 9 runs through the axle sleeve 12, to ensure that drive rod 9 is connected with driving part output end After can realize and pump under air-proof condition.

Axis direction of the width of the fixture block 64 along the valve rod 61 successively decreases downwards.The cooperation of fixture block 64 and neck 51 makes Conical section 63 is obtained with connecting the increase of the contact area between the wall of cavity 5, that is, increases the sealing effectiveness of primary seal, while fixture block 64 Axis direction of the width along valve rod 61 successively decrease downwards, similarly connect the groove width of neck 51 on the wall of cavity 5 also along valve rod 61 Axis direction successively decreases downwards, i.e., can reduce the liquid chlorine residual quantity in neck 51, and fixture block when being blocked to liquid chlorine runner 64 with the contact process of neck 51, the deformation quantity that fixture block 64 is squeezed and occurred can be gradually reduced in the groove width of neck 51 It is restricted in part, i.e., the interaction force between fixture block 64 and neck 51 is passed along along valve rod 61 axially direction directed downwardly Increase, and then increase the sealing effectiveness 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 gradually Contacted with the lower ending opening for connecting cavity 5, until neck 51 agrees with completely with fixture block 64, valve rod 61 stops movement, now seals Ring 65 occurs certain deformation and secondary seal is realized to the lower end for connecting cavity 5, and longitudinal cross-section for U-shaped sealing ring 65 with When mutual extruding occurs for connection cavity 5, the deformation of the outer circumference of sealing ring 65 possesses certain deformation by its U-shaped portion point Space, that is, prevent the part for playing sealing function on sealing ring 65 not result in 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 possesses active chemical property, corrosivity is provided simultaneously with, the general rubber as sealing medium Service life of the glue material under liquid chlorine environment is shorter, the phenomenon for hardening cracking easily occur, and inventor selects polytetrafluoroethyl-ne Alkene material is as fixture block 64 and the raw material of sealing ring 65, using its good decay resistance, to ensure in control valve Ensure the stability of primary seal and secondary seal, while extend the service life of fixture block 64 and sealing ring 65, reduction control The frequency that valve inner part processed is changed.

Above-described embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect One step is described in detail, be should be understood that and be the foregoing is only embodiment of the present utility model, is not used to limit Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, is equally replaced Change, improve, should be included within protection domain of the present utility model.

Claims (2)

1. for the control valve of liquid chlorine filling system zero leakage, including valve body (1) and valve element, liquid chlorine runner is provided with valve body (1), Valve body (1) both sides are provided with import (2) and outlet (7) respectively with liquid chlorine flow passage, it is characterised in that：The valve element includes valve Core body (6) and matched U-shaped valve seat (4), the valve seat (4) of horizontal positioned U-shaped are arranged on the middle part of liquid chlorine runner, valve Seat (4) by the liquid chlorine channel partition into first paragraph runner and second segment runner, the insert body (6) include valve rod (61) and Two sprues (62) on valve rod (61) are disposed on, external diameter is provided with sprue (62) lower surface along valve rod (61) axis side To the conical section (63) successively decreased downwards, conical section (63) is set on the outer circle wall of valve rod (61), and valve seat (4) level is put Put, and the connection cavity (5) being engaged with conical section (63) is provided with two vertical sections of valve seat (4), valve rod (61) is erected It is straight to be provided with multiple fixture blocks (64) on its external wall along the conical section (63) is circumferential through two connection cavitys (5), Multiple necks (51) being adapted with the fixture block (64) are provided with connection cavity (5) inwall, under the conical section (63) End face is fixed with sealing ring (65), and the external diameter of the sealing ring (65) is more than the internal diameter of described connection cavity (5) lower ending opening； Valve body (1) upper end is provided with supporter (11), and supporting plate (13) is fixed on supporter (11) upper surface, in the middle part of supporter (11) Cavity is provided with, drive rod (9) is installed in valve rod (61) upper end, drive rod (9) activity runs through the cavity, supporting plate (13) upwardly extended after, filler (10) is provided with the cavity, retreat stop block is additionally provided with inside valve body (1), retreat stop block Upper surface is provided with the retaining hole (3) just to valve rod (61) bottom, the axle of the width of the fixture block (64) along the valve rod (61) Successively decrease downwards in line direction；The longitudinal cross-section of the sealing ring (65) is the U-shaped of horizontal positioned.

2. according to the control valve for liquid chlorine filling system zero leakage described in claim 1, it is characterised in that：The fixture block (64) And sealing ring (65) uses polytetrafluoroethylene (PTFE) material.