CN215487674U

CN215487674U - Needle valve that leakproofness is good

Info

Publication number: CN215487674U
Application number: CN202121692798.2U
Authority: CN
Inventors: 项策; 汪德维; 倪海宁
Original assignee: Yadeng Valve Pipe Fittings Co ltd
Current assignee: Yadeng Valve Pipe Fittings Co ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-01-11
Anticipated expiration: 2031-07-23

Abstract

The utility model relates to a needle valve with good sealing performance, which comprises a valve body, a valve seat, a valve rod and a valve core, wherein a valve way for medium to circulate is arranged on the valve body, the valve way comprises an inlet valve way and an outlet valve way, a transition valve way for communicating the inlet valve way and the outlet valve way is arranged between the inlet valve way and the outlet valve way, a moving way for the valve rod to move is arranged on the valve body, the valve rod moves along the moving way and drives the valve core to be in sealing fit with the valve seat to form sealing of the transition valve way, a coaxial slide way which is in the same vertical direction with the moving way is arranged on the valve body, a moving block which moves along the coaxial slide way is arranged in the coaxial slide way, the size of the moving block is matched with that of the coaxial slide way, a moving rod is arranged between the moving block and the valve core, one end of the moving rod is fixedly arranged on the valve core, and the other end of the moving block is arranged on the moving block. The utility model provides a needle valve with good sealing performance.

Description

Needle valve that leakproofness is good

Technical Field

The utility model relates to a needle valve, in particular to a needle valve with good sealing performance.

Background

The needle valve is a valve which can be accurately adjusted, and has wide application, such as cutting distance for flame cutting, a knob for adjusting flame temperature is the needle valve, the instrument needle valve is an important component in an instrument measuring pipeline system and mainly comprises a stop valve and a ball valve, the knob is used for opening or cutting off a pipeline passage, the needle valve comprises a valve body, a valve seat, a valve rod and a valve core, a valve passage for medium circulation is arranged on the valve body, the valve passage comprises a valve body, a valve seat, a valve rod and a valve core, the valve body is provided with a valve passage for medium circulation, the valve passage comprises an inlet valve passage and an outlet valve passage, a transition valve passage for communicating the inlet valve passage and the outlet valve passage is arranged between the inlet valve passage and the outlet valve passage, the valve body is provided with a moving passage for moving the valve rod, and the valve core is driven by the valve rod to move along the moving passage and is in sealing fit with the valve seat to form the transition valve passage.

If present needle valve if the valve rod with move between saying if there is the clearance, and the valve way is the level setting for lead to the case when receiving the impact of medium, the valve rod skew leads to the sealed cooperation between case and the disk seat to lose efficacy, leads to the medium to pass through, makes leakproofness greatly reduced, influences normal use.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a needle valve with good sealing performance.

In order to achieve the purpose, the utility model provides the following technical scheme: the valve comprises a valve body, a valve seat, a valve rod and a valve core, wherein a valve path for medium circulation is arranged on the valve body, the valve path comprises an inlet valve path and an outlet valve path, a transition valve path for communicating the inlet valve path and the outlet valve path is arranged between the inlet valve path and the outlet valve path, a moving path for the valve rod to move is arranged on the valve body, the valve rod moves along the moving path and drives the valve core to be matched with the valve seat in a sealing mode to form the sealing of the transition valve path, the valve body is provided with a coaxial slide way which is vertical to the moving path, a moving block which moves along the coaxial slide way is arranged in the coaxial slide way, the size of the moving block is matched with that of the coaxial slide way, the moving rod is arranged between the moving block and the valve core, one end of the moving rod is fixedly arranged on the valve core, and the other end of the moving block is arranged on the moving block.

Through adopting above-mentioned technical scheme, be provided with the movable block at the other end of the relative and valve rod of case, and the movable block slides in coaxial slide for case upper portion receives the spacing of moving the way, and the lower part receives the spacing of coaxial slide, even the case receives great medium impact, all receive under spacing circumstances at both ends, the case can not take place to squint, kept the sealed cooperation with the disk seat, avoid the emergence of revealing, and movable block and coaxial slide size looks adaptation, the movable block plays the effect of isolated medium simultaneously.

The utility model is further configured to: and an anti-falling spring is arranged between the moving block and the bottom of the coaxial slideway.

Through adopting above-mentioned technical scheme, the movable block is avoided breaking away from coaxial slide in the setting of anti-drop spring, and simultaneously when operator's manual drive valve rod rotated, along with the rising of case, the anti-drop spring is big more along with the effort that its provided of increase of extension degree, can become to remind the operator not excessively to open the valve mutually, avoids causing the influence to the follow-up use of valve.

The utility model is further configured to: the anti-drop spring and coaxial slide between set up the bottom block, the opposite side of the relative spring of bottom block is provided with the threaded rod, be provided with the screw hole with threaded rod looks adaptation on the valve body, the threaded rod passes through the screw hole and extends to outside the valve body, the threaded rod is in the outer one end of valve body and is provided with the operation end.

Through adopting above-mentioned technical scheme, when long-time use, the elasticity of anti-drop spring descends for the degree of opening of case is limited, can't reach the state of opening completely, causes the influence to the normal use of valve, so add bottom block and threaded rod, after the elasticity decline of anti-drop spring, rotate the threaded rod through the operating end and remove in to the valve body, make the bottom block remove to case place direction, be used for remedying the part that anti-drop spring elasticity descends, in order to guarantee the normal use of valve.

The utility model is further configured to: a guide shaft sleeve is arranged between the moving block and the inner wall of the coaxial slide way, and the size of the bottom block is matched with the guide shaft sleeve.

Through adopting above-mentioned technical scheme, the setting up of direction axle sleeve makes the movable block reduce at the degree of wear of removal in-process, prevents that the medium from passing through in the clearance between movable block and coaxial slide inner wall, causes the anti-drop spring to be soaked by the medium and inefficacy.

The utility model is further configured to: the inlet valve channel is horizontally inclined downwards, the transition valve channel is vertically arranged and is positioned on the same straight line with the moving channel and the coaxial slide way, the outlet valve channel is horizontally inclined downwards, and the valve channel formed by the inlet valve channel, the transition valve channel and the outlet valve channel is in an inclined Z shape.

Through adopting above-mentioned technical scheme, if the import valve says, transition valve says and the export valve says and is in on the same horizontal plane, after the medium is said from the import valve and is got into, can be directly to being in the transition valve and say and lead to the fact the impact to the case, and lead to the fact the skew of case, so the import valve says along the level downwards, make the impact of medium keep off by the valve body down, and can directly not lead to the fact the impact to the case, then along with the increase of pressure, rise from the transition valve way, little to the impact of case, if the case is opened, just can follow transition valve way and flow to the export valve way, and the export valve says and be the level downwards, do benefit to the outflow of medium.

The utility model is further configured to: the valve rod extends out of the valve body to form a mounting end for mounting the hand wheel, a mounting hole matched with the mounting end in size is formed in the center of the hand wheel, and the mounting hole and the mounting end are fixed through screws.

Drawings

FIG. 1 is a cross-sectional view of the present invention in its entirety;

FIG. 2 is a partial enlarged view of the position A in the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-2, the utility model discloses a needle valve with good sealing performance, comprising a valve body 1, a valve seat 2, a valve rod 3 and a valve core 4, wherein a valve passage 5 for medium to flow is arranged on the valve body 1, the valve passage 5 comprises an inlet valve passage 51 and an outlet valve passage 53, a transition valve passage 52 for communicating the inlet valve passage 51 with the outlet valve passage 53 is arranged between the inlet valve passage 51 and the outlet valve passage 53, a moving passage 6 for the valve rod 3 to move is arranged on the valve body 1, the valve rod 3 moves along the moving passage 6 and drives the valve core 4 to be in sealing fit with the valve seat 2 to form the sealing of the transition valve passage 52, a coaxial slide passage 7 which is vertical to the moving passage 6 is arranged on the valve body 1, a moving block 71 which moves along the coaxial slide passage 7 is arranged in the coaxial slide passage 7, the size of the moving block 71 is matched with the coaxial slide passage 7, a moving rod 72 is arranged between the moving block 71 and the valve core 4, one end of the moving rod 72 is fixedly arranged on the valve core 4, the other end is arranged on a moving block 71, the moving block 71 is arranged at the other end, opposite to the valve rod 3, of the valve core 4, the moving block 71 slides in the coaxial slide way 7, so that the upper portion of the valve core 4 is limited by the moving way 6, the lower portion of the valve core 4 is limited by the coaxial slide way 7, even if the valve core 4 is impacted by a large medium, the valve core 4 cannot deviate under the condition that the two ends of the valve core are limited, the sealing fit with the valve seat 2 is kept, the leakage is avoided, the size of the moving block 71 is matched with that of the coaxial slide way 7, and the moving block 71 plays a role in isolating the medium at the same time.

Moving block 71 and coaxial slide 7 bottom between be provided with anti-drop spring 73, anti-drop spring 73's setting is avoided moving block 71 to break away from coaxial slide 7, when operator manually drives valve rod 3 and rotates simultaneously, along with the rising of case 4, anti-drop spring 73 is big along with the effort that its provided of increase of extension degree, can change the looks and remind the operator not excessively to open the valve, avoids causing the influence to the follow-up use of valve.

The anti-falling valve is characterized in that a bottom block 74 is arranged between the anti-falling spring 73 and the coaxial slide 7, a threaded rod 75 is arranged on the other side of the bottom block 74 opposite to the spring, a threaded hole 11 matched with the threaded rod 75 is formed in the valve body 1, the threaded rod 75 extends out of the valve body 1 through the threaded hole 11, an operating end 751 is arranged at one end, located outside the valve body 1, of the threaded rod 75, when the anti-falling spring 73 is used for a long time, the elastic falling of the anti-falling spring 73 enables the opening degree of the valve core 4 to be limited and the valve core 4 cannot reach a completely opened state, and influences the normal use of the valve.

A guide shaft sleeve 76 is arranged between the moving block 71 and the inner wall of the coaxial slideway 7, the bottom block 74 is matched with the guide shaft sleeve 76 in size, and the arrangement of the guide shaft sleeve 76 reduces the abrasion degree of the moving block 71 in the moving process, so that the medium is prevented from passing through a gap between the moving block 71 and the inner wall of the coaxial slideway 7, and the anti-falling spring 73 is prevented from being soaked by the medium and losing efficacy.

The inlet valve passage 51 is inclined downwards along the horizontal direction, the transition valve passage 52 is arranged vertically and is positioned on the same straight line with the moving passage 6 and the coaxial slide way 7, the outlet valve passage 53 is inclined downwards along the horizontal direction, the valve passage 5 formed by the inlet valve passage 51, the transition valve passage 52 and the outlet valve passage 53 is in a tilted Z shape, if the inlet valve passage 51, the transition valve passage 52 and the outlet valve passage 53 are positioned on the same horizontal plane, after a medium enters from the inlet valve passage 51, the medium can directly impact the valve core 4 on the transition valve passage 52 to cause the deviation of the valve core 4, so that the inlet valve passage 51 is arranged downwards along the horizontal direction, the impact of the medium is blocked by the valve body 1, the medium cannot directly impact the valve core 4, then the medium rises from the transition valve passage 52 along with the increase of the pressure, the impact on the valve core 4 is small, if the valve core 4 is opened, the medium can flow from the transition valve passage 52 to the outlet valve passage 53, and the outlet valve passage 53 is positioned downwards along the horizontal direction, the outflow of the medium is facilitated.

Including hand wheel 8, valve rod 3 extend to valve body 1 outside and form the installation end 31 that supplies hand wheel 8 to install, the hand wheel 8 center is provided with the mounting hole 81 with installation end 31 size looks adaptation, pass through the fix with screw between mounting hole 81 and the installation end 31.

Claims

1. The utility model provides a needle valve that leakproofness is good, includes valve body, disk seat, valve rod and case, is provided with the valve way that supplies the medium circulation on the valve body, and the valve way is including import valve way and export valve way, has the transition valve way with both intercommunications between import valve way and the export valve way, is provided with the removal way that supplies the valve rod to remove on the valve body, and the valve rod is along removing the removal and drive the valve core and constitute the closure to the transition valve way with the sealed cooperation of disk seat, its characterized in that: the valve body is provided with a coaxial slide way which is vertical to the moving way, a moving block which moves along the coaxial slide way is arranged in the coaxial slide way, the size of the moving block is matched with that of the coaxial slide way, a moving rod is arranged between the moving block and the valve core, one end of the moving rod is fixedly arranged on the valve core, and the other end of the moving rod is arranged on the moving block.

2. The needle valve of claim 1, wherein: and an anti-falling spring is arranged between the moving block and the bottom of the coaxial slideway.

3. The needle valve of claim 2, wherein: the anti-drop spring and coaxial slide between set up the bottom block, the opposite side of the relative spring of bottom block is provided with the threaded rod, be provided with the screw hole with threaded rod looks adaptation on the valve body, the threaded rod passes through the screw hole and extends to outside the valve body, the threaded rod is in the outer one end of valve body and is provided with the operation end.

4. A needle valve of good sealing performance as claimed in claim 3, wherein: a guide shaft sleeve is arranged between the moving block and the inner wall of the coaxial slide way, and the size of the bottom block is matched with the guide shaft sleeve.

5. The needle valve of claim 1, wherein: the inlet valve channel is horizontally inclined downwards, the transition valve channel is vertically arranged and is positioned on the same straight line with the moving channel and the coaxial slide way, the outlet valve channel is horizontally inclined downwards, and the valve channel formed by the inlet valve channel, the transition valve channel and the outlet valve channel is in an inclined Z shape.

6. The needle valve of claim 1, wherein: the valve rod extends out of the valve body to form a mounting end for mounting the hand wheel, a mounting hole matched with the mounting end in size is formed in the center of the hand wheel, and the mounting hole and the mounting end are fixed through screws.