CN107013699B - Plastic-steel gas valve - Google Patents
Plastic-steel gas valve Download PDFInfo
- Publication number
- CN107013699B CN107013699B CN201710413105.3A CN201710413105A CN107013699B CN 107013699 B CN107013699 B CN 107013699B CN 201710413105 A CN201710413105 A CN 201710413105A CN 107013699 B CN107013699 B CN 107013699B
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- valve
- valve core
- valve body
- core
- sealing
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 239000004033 plastic Substances 0.000 claims abstract description 35
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000002991 molded plastic Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 239000003638 chemical reducing agent Substances 0.000 description 7
- 238000007667 floating Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 208000024891 symptom Diseases 0.000 description 3
- 235000014121 butter Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/22—Features relating to lubrication
- F16K5/227—Features relating to lubrication for plugs with spherical surfaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to a plastic steel gas valve. The plastic steel gas valve comprises a valve body, a valve core arranged in the valve body and a valve rod for driving the valve core; the valve body is internally provided with a valve body flow passage, and the inner side wall surface of the valve body flow passage is covered with a steel sleeve; the upper end part of the valve core is positioned by the valve rod, and the lower end part of the valve core is positioned on the steel sleeve; cover plate components are fixed on the two axial end parts of the valve body flow channel, sealing gaskets are arranged in the cover plate components, and the inner side end surfaces of the sealing gaskets comprise tip parts on two sides and sealing parts between the tip parts on two sides. The invention aims to provide a plastic steel gas valve; on one hand, the valve core in the plastic steel gas valve is positioned by the center of the steel sleeve and the valve rod, and the sealing gaskets at the upstream and downstream of the valve core are always in a relaxed and effective normal state, so that the sealing performance of long-term use is ensured; on the other hand, the sealing gasket in the gas valve can avoid the damage of the valve core by possible granular objects on the premise of ensuring the tightness.
Description
Technical Field
The invention relates to the field of valves, in particular to a plastic steel gas valve.
Background
The gas valve is installed on the gas pipeline and is used for controlling the gas volume flow delivered to the gas equipment in multiple stages. Most of the existing gas valves are all plastic pipe valves, the plastic pipe valve processing technology is complex, and the inner cavity forming technology of the valve body is complex; and the gas valve formed by plastic injection molding is not suitable for the compression resistant marking in the industry at present. The compression resistance required in the industry is marked as 6kg/cm 2 The ball valve has larger stress area, so that the ball valve is calculated to be 1.2 times, and the ball valve needs to reach 7.2kg/cm 2 Is a compression-resistant label; for example, phi 315 tubes are built-inThe pressure to which the ball valve is subjected is calculated to be 3750kg.
Under the premise, the existing large-scale gas valve adopts a floating ball valve structure, and the floating ball valve is subjected to larger pressure in a closed state, so that the existing floating ball valve has at least the following two problems: 1, a valve core of a floating ball valve cannot be positioned effectively, so that when a single side receives a large axial pressure, the valve core is axially extruded to generate displacement, a gap is generated between the valve core and an upstream sealing ring of the valve core, a downstream sealing ring of the valve core is severely extruded to deform and finally is pressed to be invalid, the end face material of the sealing ring is more likely to be embedded into the surface of the valve core, and after the valve core is used for a plurality of times, the downstream sealing ring cannot realize sealing; 2, when the existing large-sized floating ball valve receives axial pressure, the pressure encountered by the rotating operation of the existing large-sized floating ball valve is very large, and the existing large-sized floating ball valve can be realized only by means of a force reducer; the switch is realized by means of external force, but the force required by the rotation of the sphere is not changed, namely, the switch belongs to a method for treating the symptoms but not the root causes.
Further, the conventional structure of the existing gas valve includes a valve body, and a valve core provided inside the valve body. The valve body is internally provided with a valve body flow passage, and the valve core is rotatably arranged in the valve body flow passage. Ball valves are a common type of valves, and are characterized in that a valve core in the valve body is in a ball shape, the existing gas valve adopts a ball valve form, and a valve core flow channel is formed in the ball. In the gas valve, sealing gaskets are arranged in the valve body flow passages at two sides of the valve core, and the sealing gaskets are used for guaranteeing tightness between the valve core and the side wall of the valve body and guaranteeing that gas cannot leak from a gap between the valve core and the valve body. But the sealing gasket end surfaces of the existing gas valve are all arc-shaped, and the arc-shaped is used for completely fitting the surface of the valve core, so that the tightness is ensured. However, with this structure, if a granular object (such as sand) exists on the surface of the valve core, the granular object is easily pushed between the sealing gasket and the valve core when the valve core rotates, and the sand is squeezed to abrade the valve core and the sealing gasket, so that the surfaces of the valve core and the sealing gasket are damaged, and the sealing property of the valve is reduced. In addition, the valve core flow passage of the existing gas valve is a cylindrical flow passage axially penetrating through the sphere, and the valve core under the structure has thicker middle part and thinner two ends (the middle part and the two ends are based on the valve core flow passage). When the structure is applied to the plastic valve core, due to the characteristics of plastic products, the plastic valve core inevitably generates bubbles inside, and the thicker part is more likely to generate bubbles and material shrinkage, so that the strength of the valve core is reduced.
Based on the gas valve, the problems also exist, and a steel-plastic ball valve with completely different functions is designed.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a plastic steel gas valve; on one hand, the valve core in the plastic steel gas valve is positioned by the center of the steel sleeve and the valve rod, so that the valve core can not generate displacement when receiving axial pressure, and the sealing gaskets at the upper and lower streams of the valve core are always in a relaxed and effective normal state, thereby ensuring the sealing performance for long-term use; on the other hand, the sealing gasket in the gas valve adopts a special end face structure, and the valve core is prevented from being damaged by possible granular objects on the premise of ensuring the tightness.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the plastic steel gas valve comprises a valve body, a valve core arranged in the valve body and a valve rod for driving the valve core; the method is characterized in that: the valve body is a plastic valve body formed by integral injection molding, a valve body runner is arranged in the valve body, and a steel sleeve is covered on the inner side wall surface of the valve body runner; the upper end of the valve core is positioned by the valve rod, the lower end of the valve core is positioned on the steel sleeve, and the valve core is positioned in the valve body flow channel along the vertical axis core line; cover plate assemblies are fixed on the two axial end parts of the valve body flow channel, sealing gaskets are arranged in the cover plate assemblies, and the inner side end surfaces of the sealing gaskets are in tight fit with the outer side end surfaces of the valve cores; the inner side end face of the sealing gasket comprises two side tip parts and a sealing part positioned between the two side tip parts; the end point of the tip part and the outer end part of the sealing part are respectively attached to the outer end surface of the valve core, and a gap for filling solid lubricant is arranged between the tip part and the sealing part.
Preferably, a boss is arranged in the middle of the lower end face of the steel sleeve, the boss is positioned in the axial direction of the shaft hole, and the lower end part of the valve core is positioned on the boss.
Preferably, the upper end of the valve body is provided with a shaft hole communicated with the flow passage of the valve body, the upper end surface of the steel sleeve extends to cover the shaft hole, and the valve rod penetrates through the shaft hole and the inner end of the valve rod is fixedly connected with the valve core. In the technical scheme, the upper end of the valve core is positioned through the valve rod, and the lower end of the valve core is positioned on the boss, so that the central positioning is realized, and the valve core cannot deviate when being pressed.
Preferably, the valve rod is positioned in the shaft hole through a first bearing, a second bearing is arranged at the upper end of the boss, and the lower end part of the valve core is positioned on the second bearing. In the technical scheme, the upper end part and the lower end part of the valve core are positioned through the bearings, so that the stress area of the positioning end is increased, the pressure (namely the pressure intensity) born by the unit area is reduced, and the friction force about 70% is subtracted from the bearings, so that the force required by torsion of the valve core is reduced by 70%; the valve has revolutionary effect on the ball valve, the large ball valve does not need to be opened and closed through the force reducer, and the traditional speed reducer only optimizes the valve rod force, so that the scheme is a scheme for treating the symptoms and not treating the root causes, and compared with the scheme for applying the force reducer, the scheme is optimized from the inside of the valve, thereby achieving the purpose of saving labor.
Preferably, the sealing part is an arc-shaped sealing part, and the arc end surface of the sealing part abuts against the outer end surface of the valve core. In this scheme, sealing portion needs to laminate with the outside terminal surface of case and realize sealedly, and adopts arc sealing portion reducible area of contact, reduces the case and rotates the in-process and receive the resistance from sealing portion.
Preferably, the cover plate assembly includes an inner cover plate and an outer cover plate disposed within the valve body flow passage.
Preferably, an annular flanging protruding inwards is arranged on the inner side end surface of the outer cover plate, and the sealing gasket is sleeved on the annular flanging. Further, the sheathing mode is tension sheathing matching, namely, the sealing gasket is firmly sheathed on the annular turning edge by using the material elasticity of the sealing gasket, so that the connection firmness is ensured.
Preferably, the valve core is an integrally injection molded plastic valve core, a ball cavity is arranged in the valve core, and a valve core runner inlet and a valve core runner outlet which are communicated with the ball cavity are arranged on the surface of the valve core; the thickness of the side wall of the valve core is equal; in the valve core, the shortest distances from the side wall of the cavity of the ball cavity to the peripheral outer side wall of the valve core are equal. The valve core is internally provided with a ball cavity, and the surface of the valve core is provided with a valve core runner inlet and a valve core runner outlet which are communicated with the ball cavity; compared with a cylindrical flow passage formed on a traditional valve core, the valve core is a plastic equal-wall valve core with approximately equal thickness at each part, so that on one hand, required forming materials can be reduced, and the cost is reduced; on the other hand, the strength of each part of the valve core is ensured to be consistent, and the problem of material shrinkage caused by excessive air bubbles in the area due to overlarge wall thickness is avoided. In addition, the upper end part of the valve core is an upper connecting end for connecting a valve rod; the lower end of the valve core is a lower connecting end used for being positioned in the valve body. Because the upper connecting end of the valve core needs to be connected with the valve rod, the lower connecting end of the valve core needs to be positioned on the valve body, and positioning ports are arranged on the upper connecting end and the lower connecting end, the limitation that the thickness of the side wall of the valve core is equal does not comprise the upper connecting end and the lower connecting end of the valve core; similarly, the valve core flow channel inlet and the valve core flow channel outlet on the side face of the valve core are not in the limit range of the equal wall.
The technical scheme relates to a plastic steel gas valve, which has the following advantages:
1, a steel sleeve is arranged in the plastic valve body of the plastic steel gas valve and is used for improving the strength of the valve body and preventing the plastic valve body from secondary deformation and shrinkage. Further, the valve core is positioned by the center of the steel sleeve and the valve rod, so that the valve core can not generate displacement when receiving axial pressure, and the sealing gaskets at the upstream and downstream of the valve core are always in a relaxed and effective normal state, thereby ensuring the sealing performance for long-term use.
2, the inner side end face of the sealing pad of the plastic steel gas valve comprises two side tip parts and a sealing part positioned between the two side tip parts, and a gap is formed between the tip parts and the sealing part. When the sealing gasket is used, the end point of the tip end part of the sealing gasket and the outer end part of the sealing part are attached to the outer end surface of the valve core, the tip end part is mainly used for removing granular objects on the surface of the valve core, and the sealing gasket has functions similar to a scraper knife; a sealing portion for providing a sealing effect; the gap between the tip and the seal is filled with a solid lubricant (e.g., butter) to reduce friction, avoid wear, and reduce drag from the seal during rotation of the spool.
Drawings
Fig. 1 is a structural development of a gas valve (without valve core).
Fig. 2 is a schematic diagram of a valve core structure of the gas valve.
FIG. 3 is a schematic diagram of a seal assembly of a gas valve.
Fig. 4 is an enlarged view of a portion a of fig. 3.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The plastic steel gas valve as shown in fig. 1-4 comprises a valve body 1, a valve core 2 arranged in the valve body 1 and a valve rod 4 for driving the valve core 2. The valve body 1 is a plastic valve body formed by integral injection molding, a valve body flow channel 11 is arranged in the valve body 1, a steel sleeve 3 is covered on the inner side wall surface of the valve body flow channel 11, and pipe bodies 13 are connected to the valve body 1 on two sides of the valve body flow channel 11. The outer end of the valve rod 4 is arranged outside the valve body 1, and a rotating nut 5 is connected to the outer end of the valve rod 4. The upper end of the valve core 2 is positioned by the valve rod 4, the lower end of the valve core 2 is positioned on the steel sleeve 3, and the valve core 2 is positioned in the valve body flow passage 11 along the vertical axis core line. The plastic valve body 1 of the plastic steel gas valve is internally provided with the steel sleeve 3, and the steel sleeve 3 is used for improving the strength of the valve body 1 and preventing the plastic valve body 1 from secondary deformation and shrinkage. Further, the valve core 2 is positioned by the center of the steel sleeve 3 and the valve rod 4, so that the valve core 2 can not generate displacement when receiving axial pressure, and sealing gaskets at the upper and lower streams of the valve core 2 are always in a relaxed and effective normal state, thereby ensuring the sealing performance for long-term use.
Specifically, the upper end of the valve body 1 is provided with a shaft hole 12 communicated with the valve body flow channel 11, the upper end surface of the steel sleeve 3 extends to cover the shaft hole 12, and the valve rod 4 passes through the shaft hole 12 and the inner end of the valve rod is fixedly connected with the valve core 2. The middle part of the lower end surface of the steel sleeve 3 is provided with a boss 31, the boss 31 is positioned on the boss 31 along the axial direction of the shaft hole 12, and the lower end part of the valve core 2 is positioned on the boss 31. In the technical scheme, the upper end of the valve core 2 is positioned through the valve rod 4, and the lower end of the valve core 2 is positioned on the boss 31, so that the central positioning is realized, and no offset is generated when the valve core is pressed. The valve rod 4 is positioned in the shaft hole 12 through a first bearing, the upper end of the boss 31 is provided with a second bearing 32, and the lower end of the valve core 2 is positioned on the second bearing 32. In the technical scheme, the upper end part and the lower end part of the valve core are positioned through the bearings, so that the stress area of the positioning end is increased, the pressure (namely the pressure intensity) born by the unit area is reduced, and the friction force about 70% is subtracted from the bearings, so that the force required by torsion of the valve core is reduced by 70%; the valve has revolutionary effect on the ball valve, the large ball valve does not need to be opened and closed through the force reducer, and the traditional speed reducer only optimizes the valve rod force, so that the scheme is a scheme for treating the symptoms and not treating the root causes, and compared with the scheme for applying the force reducer, the scheme is optimized from the inside of the valve, thereby achieving the purpose of saving labor.
Further, cover plate assemblies are fixed on the two axial end parts of the valve body flow channel 11, and each cover plate assembly comprises an inner cover plate 15 and an outer cover plate 14 which are arranged in the valve body flow channel 11. The cover plate assembly is internally provided with a sealing gasket 16, the inner side end surface of the outer cover plate 14 is provided with an annular flanging 141 protruding inwards, and the sealing gasket 16 is sleeved on the annular flanging 141. Further, the sleeving manner is a tensioning sleeving fit, namely, the sealing gasket 16 is firmly sleeved on the annular flange 141 by using the elasticity of the material of the sealing gasket, so that the connection firmness is ensured.
The inner end surface of the sealing gasket 16 is in tension fit with the outer end surface of the valve core 2, and the inner end surface of the sealing gasket 16 comprises two pointed end parts 161 and a sealing part 162 between the two pointed end parts 161. The end point of the tip portion 161 and the outer end of the sealing portion 162 are attached to the outer end surface of the valve body 2, and a gap 163 for filling the solid lubricant is provided between the tip portion 161 and the sealing portion 162. When in use, the end point of the tip end 161 of the sealing gasket 16 and the outer end of the sealing part 162 are respectively attached to the outer end surface of the valve core 2, and the tip end 161 is mainly used for removing granular objects on the surface of the valve core 2, and has a function similar to a shovel blade. The seal 162 is primarily intended to provide a sealing action. The gap between the tip portion 161 and the sealing portion 162 is filled with a solid lubricant (e.g., butter) to reduce friction, avoid wear, and reduce resistance from the sealing portion 162 during rotation of the valve spool 2. Specifically, the sealing portion 162 is an arc-shaped sealing portion 162, and an arc end surface of the sealing portion 162 abuts against an outer end surface of the valve element 2. In this scheme, the sealing portion 162 needs to be attached to the outer end surface of the valve core 2 to achieve sealing, and the arc-shaped sealing portion 162 can reduce the contact area, so that the resistance from the sealing portion 162 in the rotation process of the valve core 2 is reduced.
Further, the valve core 2 is an integrally injection molded plastic valve core, a ball cavity 21 is arranged in the valve core 2, and a valve core runner inlet 22 and a valve core runner outlet 23 which are communicated with the ball cavity 21 are arranged on the surface of the valve core 2. The thickness of the side wall of the valve core 2 is equal. That is, in the valve element 2, the shortest distances from the cavity side wall of the ball cavity 21 to the circumferential outer side wall of the valve element 2 are equal. The valve core 2 is internally provided with a ball cavity 21, and the surface of the valve core 2 is provided with a valve core flow passage inlet 22 and a valve core flow passage outlet 23 which are communicated with the ball cavity 21. Compared with a cylindrical flow passage formed on the traditional valve core 2, the valve core 2 is a plastic equal-wall valve core 2 with approximately equal thickness at each part, so that on one hand, required forming materials can be reduced, and the cost is reduced. On the other hand, the strength of each part of the valve core 2 is ensured to be consistent, and the problem of material shrinkage caused by excessive air bubbles in the area due to overlarge wall thickness is avoided. The upper end portion of the valve body 2 is an upper connection end 25 for connecting to the valve stem 4. The lower end of the valve spool 2 is a lower connecting end 26 for positioning within the valve body 1. Because the upper connecting end of the valve core 2 needs to be connected with the valve rod 4, the lower connecting end of the valve core 2 needs to be positioned on the valve body 1, and positioning ports are formed on the upper connecting end and the lower connecting end, the limitation that the thickness of the side wall of the valve core 2 is equal does not comprise the upper connecting end and the lower connecting end of the valve core. Similarly, the spool flow path inlet 22 and spool flow path outlet 23 on the side of the spool 2 are not within the above-described limit of the equal wall.
Claims (6)
1. The plastic steel gas valve comprises a valve body, a valve core arranged in the valve body and a valve rod for driving the valve core; the method is characterized in that: the valve body is a plastic valve body formed by integral injection molding, a valve body runner is arranged in the valve body, and a steel sleeve is covered on the inner side wall surface of the valve body runner; the upper end of the valve core is positioned by the valve rod, the lower end of the valve core is positioned on the steel sleeve, and the valve core is positioned in the valve body flow channel along the vertical axis core line; cover plate assemblies are fixed on the two axial end parts of the valve body flow channel, sealing gaskets are arranged in the cover plate assemblies, and the inner side end surfaces of the sealing gaskets are in tight fit with the outer side end surfaces of the valve cores; the inner side end face of the sealing gasket comprises two side tip parts and a sealing part positioned between the two side tip parts; the end point of the tip part and the outer end part of the sealing part are respectively attached to the outer end surface of the valve core, and a gap for filling solid lubricant is arranged between the tip part and the sealing part;
the sealing part is an arc-shaped sealing part, and the arc end face of the sealing part is propped against the outer end face of the valve core;
the cover plate assembly comprises an inner cover plate and an outer cover plate which are arranged in the valve body flow passage.
2. The plastic steel gas valve as set forth in claim 1, wherein: the valve body upper end is equipped with the communicating shaft hole of valve body runner, the steel bushing up end extends and covers the shaft hole, the valve rod passes the shaft hole and its inner is connected fixedly with the case.
3. The plastic steel gas valve as set forth in claim 2, wherein: the middle part of the lower end face of the steel sleeve is provided with a boss, the boss is positioned on the axis direction of the shaft hole, and the lower end part of the valve core is positioned on the boss.
4. A plastic steel gas valve as claimed in claim 3, wherein: the valve rod is positioned in the shaft hole through the first bearing, the second bearing is arranged at the upper end of the boss, and the lower end part of the valve core is positioned on the second bearing.
5. The plastic steel gas valve as set forth in claim 1, wherein: the inner side end face of the outer cover plate is provided with an annular flanging protruding inwards, and the sealing gasket is sleeved on the annular flanging.
6. The plastic steel gas valve according to any one of claims 1 to 4, wherein: the valve core is an integrally injection molded plastic valve core, a ball cavity is arranged in the valve core, and a valve core flow passage inlet and a valve core flow passage outlet which are communicated with the ball cavity are arranged on the surface of the valve core; the thickness of the side wall of the valve core is equal; in the valve core, the shortest distances from the side wall of the cavity of the ball cavity to the peripheral outer side wall of the valve core are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710413105.3A CN107013699B (en) | 2017-06-05 | 2017-06-05 | Plastic-steel gas valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710413105.3A CN107013699B (en) | 2017-06-05 | 2017-06-05 | Plastic-steel gas valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107013699A CN107013699A (en) | 2017-08-04 |
| CN107013699B true CN107013699B (en) | 2024-04-09 |
Family
ID=59452233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710413105.3A Active CN107013699B (en) | 2017-06-05 | 2017-06-05 | Plastic-steel gas valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107013699B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1426519A (en) * | 1973-05-22 | 1976-03-03 | Acf Ind Inc | Sealing means for valve structure |
| CN1813150A (en) * | 2003-04-25 | 2006-08-02 | 维克托里克公司 | Gasket for pipe coupling and pipe coupling incorporating same |
| CN201407380Y (en) * | 2009-03-06 | 2010-02-17 | 北京艾迪西暖通科技有限公司 | Welding ball valve |
| CN105782480A (en) * | 2014-12-25 | 2016-07-20 | 浙江三花汽车零部件有限公司 | Two-way ball valve |
| CN207080635U (en) * | 2017-06-05 | 2018-03-09 | 浙江声波管阀实业有限公司 | Plastic-steel gas valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7111643B2 (en) * | 2005-01-26 | 2006-09-26 | Invensys Building Systems, Inc. | Flow characterization in a flowpath |
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| GB1426519A (en) * | 1973-05-22 | 1976-03-03 | Acf Ind Inc | Sealing means for valve structure |
| CN1813150A (en) * | 2003-04-25 | 2006-08-02 | 维克托里克公司 | Gasket for pipe coupling and pipe coupling incorporating same |
| CN201407380Y (en) * | 2009-03-06 | 2010-02-17 | 北京艾迪西暖通科技有限公司 | Welding ball valve |
| CN105782480A (en) * | 2014-12-25 | 2016-07-20 | 浙江三花汽车零部件有限公司 | Two-way ball valve |
| CN207080635U (en) * | 2017-06-05 | 2018-03-09 | 浙江声波管阀实业有限公司 | Plastic-steel gas valve |
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| CN107013699A (en) | 2017-08-04 |
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