阅读说明：本技术 一种直通式针阀 (A kind of through type needle-valve ) 是由 郭庆 凃士雄 凃志兴 于 2019-09-24 设计创作，主要内容包括：本发明涉及了一种直通式针阀,其包括阀体、阀杆、阀芯、填料螺母、填料以及阀座。阀座固定于阀体的下端部。在阀体的内部开设有阀杆孔。填料内置于阀杆孔内,且围绕着阀杆的外侧壁进行填充。填料螺母旋合于阀体内,以实现对填料的压紧。阀杆穿设于填料螺母内,且亦借助于螺纹副进行联接。在阀座内设置有与阀芯外形相适配的截流腔和横贯其左右的直型流道。截流腔相对于直型流道进行垂直布置,且相互连通。这样一来,在实际运行过程中,阀芯在关闭状态下仅受到侧向力的作用,从而有效地降低了对阀杆联接螺纹强度的要求,且避免了气体压力波动对运行稳定性的影响。另外,杂质等污染物不易在直型流道内存留。(The present invention relates to a kind of through type needle-valves comprising valve body, valve rod, spool, stuffing nut, filler and valve seat.Valve seat is fixed on the lower end of valve body.Valve rod hole is offered in the inside of valve body.Filler is built in valve rod hole, and is filled around the lateral wall of valve rod.Stuffing nut is combined in valve body, to realize the compression to filler.Valve rod is arranged in stuffing nut, and is also coupled by means of screw thread pair.It is provided with shut-off chamber compatible with spool shape in valve seat and traverses the straight type runner of its left and right.Shut-off chamber is arranged vertically relative to straight type runner, and is interconnected.So, in actual moving process, spool is in the off state only by the effect of lateral force, to significantly reduce the requirement to valve rod connection screw strength, and avoids influence of the gas pressure fluctuation to operation stability.In addition, the pollutants such as impurity are not easy to retain in straight type runner.)

1. a kind of through type needle-valve, which is characterized in that including valve body, valve rod, spool, stuffing nut, filler, valve seat and hand Handle；The valve seat screws, is fixed on the lower end of the valve body；It offers in the inside of the valve body for valve rod insertion Valve rod hole；The filler is built in the valve rod hole, and is filled around the lateral wall of the valve rod；The filler spiral shell Mother is combined in the valve body by means of screw thread pair, to realize the compression to the filler；The valve rod is arranged in the filler In nut, and also coupled by means of screw thread pair；Shut off compatible with the spool shape is provided in the valve seat Chamber and the straight type runner for traversing its left and right；The shut-off chamber is arranged vertically relative to the straight type runner, and is interconnected； Positional relationship of the spool relative to the shut-off chamber can be changed by valve rod described in turn, to realize the straight type stream The on/off in road is converted.

2. through type needle-valve according to claim 1, which is characterized in that the spool is taper valve core, correspondingly, described Shut-off chamber is also set as up big and down small taper.

3. through type needle-valve described in any one of -2 according to claim 1, which is characterized in that the spool lateral wall with And the inner sidewall of the shut-off chamber is provided with polytetrafluorethylecoatings coatings.

4. through type needle-valve described in any one of -2 according to claim 1, which is characterized in that further include bushing, be sheathed on In the shut-off chamber, and it is pressed against by the stuffing nut；The import of opposite arrangement is offered on the side wall of the bushing And outlet, it is connected always with the straight type runner.

5. through type needle-valve according to claim 4, which is characterized in that the bushing includes retention bead, by institute The bottom wall for stating bushing extends downwardly；Limit compatible with the retention bead is offered on the bottom wall of the shut-off chamber Pit.

6. through type needle-valve according to claim 4, which is characterized in that the bushing includes limit raised line, by institute The side wall for stating bushing extends outwardly；Limit compatible with the limit raised line is offered on the side wall of the shut-off chamber Groove.

7. through type needle-valve according to claim 4, which is characterized in that the bushing by polytetrafluoroethylene (PTFE) integrated injection molding and At.

8. through type needle-valve according to claim 4, which is characterized in that further include elastic cushion, be pressed against the filler Between nut and the bushing.

Technical field

The present invention relates to technical field of valve manufacturing, especially a kind of through type needle-valve.

Background technique

In the prior art, first passage, second channel are offered respectively in the valve seat left and right side walls of needle-valve, and The inner cavity of valve seat is provided with accommodating chamber (as shown in fig. 1) compatible with spool.It is displaced when dragging spool by valve rod When, that is, positional relationship of the spool relative to accommodating chamber can be changed, to realize the on/off of first passage and second channel. From the aspect of design structure layout, first passage and second channel need to carry out dislocation arrangement, and with respect to the horizontal plane incline Oblique certain angle.However, when needle-valve is in close state, pressed gas can always produce spool in actual moving process Raw upward power, to increase the requirement to valve rod itself connection screw strength.Furthermore the pressure unavoidable ground meeting of gas There are certain undulating values, to accelerate the abrasion of valve rod connection screw thread to a certain extent, reduce its service life.Separately Outside, the pollutants such as accumulated impurity are easy in the bottom of accommodating chamber, need to carry out periodic cleaning.Thus, it would be highly desirable to technical staff solves The above problem.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of designs of structure simply, stable, long service life, and nothing It must carry out the through type needle-valve of later period cleaning.

In order to solve the above-mentioned technical problem, the present invention relates to a kind of through type needle-valves comprising valve body, valve rod, spool, Stuffing nut, filler, valve seat and handle.Valve seat screws, is fixed on the lower end of valve body；It offers in the inside of valve body for valve The valve rod hole of bar insertion.Filler is built in valve rod hole, and is filled around the lateral wall of valve rod.Stuffing nut by means of Screw thread pair is combined in valve seat, to realize the compression to filler.Valve rod is arranged in stuffing nut, and also by means of screw thread pair into Row connection.It is provided with shut-off chamber compatible with spool shape in valve seat and traverses the straight type runner of its left and right.Shut-off chamber phase Straight type runner is arranged vertically, and is interconnected.Pass through i.e. changeable position of the spool relative to shut-off chamber of turn valve rod Relationship is set, to realize the on/off conversion of straight type runner.

As the further improvement of technical solution of the present invention, spool is taper valve core, and correspondingly, shut-off chamber is also set as Small taper under big.

As the further improvement of technical solution of the present invention, it is all provided in the lateral wall of spool and the inner sidewall of shut-off chamber It is equipped with polytetrafluorethylecoatings coatings.

As the further improvement of technical solution of the present invention, above-mentioned through type needle-valve further includes bushing, is sheathed on and cuts It flows intracavitary, and is pressed against by stuffing nut.The inlet and outlet of opposite arrangement is offered on the side wall of bushing, always with Straight type runner is connected.

As the further improvement of technical solution of the present invention, bushing includes retention bead, from the bottom wall of bushing to Under extend, correspondingly, limit pits compatible with retention bead are offered on the bottom wall of shut-off chamber.

Certainly, another Transform Type design as above-mentioned technical proposal, bushing includes limit raised line, by the side of bushing Wall extends outwardly.Limiting groove compatible with limit raised line is offered on the side wall of shut-off chamber.

As the further improvement of technical solution of the present invention, bushing is formed by polytetrafluoroethylene (PTFE) integrated injection molding.

As the further improvement of technical solution of the present invention, above-mentioned through type needle-valve further includes elastic cushion, is pressed against and fills out Expect between nut and bushing.

Compared to the needle-valve of traditional design structure, in technical solution disclosed in this invention, pass through a straight type runner Through the left and right of valve seat, and perpendicular insert of spool is separated in the inner, and so, in actual moving process, spool is being closed Only by the effect of lateral force under state, to significantly reduce the requirement to valve rod connection screw strength, and gas is avoided Influence of the body pressure oscillation to operation stability.In addition, the pollutants such as impurity are not easy to retain in straight type runner, it is effectively reduced The maintenance workloads such as later period cleaning.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of needle-valve in the prior art.

Fig. 2 is the main view of through type needle-valve in the present invention.

Fig. 3 is the side view of through type needle-valve in the present invention.

Fig. 4 is the cross-sectional view of the first embodiment of through type needle-valve in the present invention.

Fig. 5 is the cross-sectional view of second of embodiment of through type needle-valve in the present invention.

Fig. 6 is the structural schematic diagram of bushing in second of embodiment of through type needle-valve of the present invention.

Fig. 7 is the cross-sectional view of the third embodiment of through type needle-valve in the present invention.

Fig. 8 is the cross-sectional view of the 4th kind of embodiment of through type needle-valve in the present invention.

Fig. 9 is the I partial enlarged view of Fig. 8.

1- valve body；11- valve rod hole；2- valve rod；3- spool；4- stuffing nut；5- filler；6- valve seat；61- shut-off chamber； 611- limit pits；The straight type runner of 62-；7- handle；8- bushing；81- import；The outlet 82-；83- cavity；84- retention bead；9- Elastic cushion.

Specific embodiment

In the description of the present invention, it is to be understood that, the orientation or position of the instructions such as term " on ", "lower", "left", "right" Setting relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, rather than The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot It is interpreted as limitation of the present invention.

Combined with specific embodiments below, the contents of the present invention are described in further detail, Fig. 2, Fig. 3 are respectively illustrated The main view and side view of through type needle-valve in the present invention, mainly by valve body 1, valve rod 2, spool 3, stuffing nut 4, filler 5, several parts such as valve seat 6 and handle 7 are constituted.Wherein, valve seat 6 screws by means of screw thread pair, is fixed on the lower end of valve body 1. The valve rod hole 11 being inserted into for valve rod 2 is offered in the inside of valve body 1.Filler 5 is built in valve rod hole 11, and around valve rod 2 Lateral wall be filled.Stuffing nut 4 is also combined in valve body 1 by means of screw thread pair, to realize the compression to filler 5.Valve Bar 2 is arranged in stuffing nut 4, and is also coupled by means of screw thread pair, i.e., opens up interior spiral shell in the inner sidewall of stuffing nut 4 Line is correspondingly provided with external screw thread compatible with the internal screw thread in the lateral wall of valve rod 2.

It needs to illustrate a bit, for the leakproofness for improving needle-valve, to prevent gas leakage etc. from considering, be set to valve rod 2 Screw thread pair between stuffing nut 4 is preferably fine thread pair, and the lateral wall winding life around valve rod 2 is needed in work progress Material strip.

Fig. 4 shows the cross-sectional view of the first embodiment of through type needle-valve in the present invention, it is known that, it is arranged in valve seat 6 There is shut-off chamber 61 compatible with 3 shape of spool and traverses the straight type runner 62 of its left and right.Shut-off chamber 61 is relative to straight type runner 62 are arranged vertically, and are interconnected.Positional relationship of the spool 3 relative to shut-off chamber 61 can be changed by turn valve rod 2, To realize the on/off conversion of straight type runner 62.So, in actual moving process, spool 3 in the off state only by To the effect of lateral force, to significantly reduce the connection screw strength requirement to valve rod 2, and gas pressure fluctuation is avoided Influence to operation stability.In addition, the pollutants such as impurity are not easy to retain in straight type runner 62, it is effectively reduced later period cleaning Equal maintenance workloads.

As further optimization, above-mentioned spool 3 is taper valve core, correspondingly, under shut-off chamber 61 is also set as big Small taper, i.e., realize the sealing of spool 3 and shut-off chamber 61 using taper fit face, so that it is opposite to effectively improve spool 3 In the leakproofness of shut-off chamber 61, it is ensured that the practical effect of needle-valve.

It is known that spool 3 is easily worn relative to the side wall of shut-off chamber 61, to lead during long-play Mating surface is caused defect occur and lead to leakage phenomenon, for this purpose, Fig. 5 shows second of embodiment of through type needle-valve in the present invention Cross-sectional view, the distinctive points compared to the first above-mentioned embodiment are: bushing 8 is arranged in shut-off chamber 61.For The fixed fixing of bushing 8 is improved, from the aspect of preventing from occurring under the drive of shifting movement on spool 3 play phenomenon, 8 He of bushing Shut-off chamber 61 preferably completes assembly using interference fit type.The import of opposite arrangement is offered in the left and right side walls of bushing 8 81 and outlet 82, be connected always with straight type runner 62.In addition, need to also be provided with cavity 83 in bushing 8, and with spool 3 Shape be adapted (as shown in Figure 6).Positional relationship of the spool 3 relative to cavity 83 can be changed by turn valve rod 2, from And realize the on/off conversion of straight type runner 62.So, occur so as to avoid spool 3 relative to 61 side wall of shut-off chamber straight Contact, and when abrasion condition occurs, convenient for carrying out renewing operation to bushing 8, to reduce later maintenance cost.As Further optimization, bushing 8 is preferably by polytetrafluoroethylene (PTFE) or Polyethylene with Ultra High Molecular Weight one with self-lubricating property Injection molding is made, to significantly reduce its own rate of depreciation, improves its own service life, thereby reduces later period dimension Protect frequency and cost.

Certainly, a kind of remodeling as above-mentioned technical proposal, can also be directly in the lateral wall of spool 3 and shut-off chamber 61 Inner sidewall be provided with polytetrafluorethylecoatings coatings.

Though can effectively ensure that the reliable of the two connection using transition fit mode between bushing 8 and shut-off chamber 61 Property, play phenomenon occurs in subsequent long-play with being effectively prevented, but the construction of its assembling process is extremely inconvenient, sometimes It even needs to carry out pole cold treatment to bushing 8 by liquid nitrogen to complete to assemble.For this purpose, Fig. 7 shows through type needle in the present invention The cross-sectional view of the third embodiment of valve, the distinctive points compared to above-mentioned second of embodiment are: bushing 8 and shut-off chamber Assembly is completed using transition fit or clearance fit between 61, and is pressed against by stuffing nut 4, so, thus true Under the premise of protecting 8 assembly reliability of bushing, assembly difficulty degree is significantly reduced, assembly efficiency is improved.

Further optimize as above-mentioned technical proposal, be also additionally provided with elastic cushion 9, is pressed against stuffing nut 4 Between bushing 8, so that bushing 8 is by crushing phenomenon caused by effectively preventing when twisting occurred in stuffing nut 4.

The cross-sectional view and I that Fig. 8, Fig. 9 respectively illustrate the 4th kind of embodiment of through type needle-valve in the present invention are locally put Big figure, the distinctive points compared to the third above-mentioned embodiment are: retention bead 84 are provided on bushing 8, by serving as a contrast The bottom wall of set 8 extends downwardly, and correspondingly, limit compatible with retention bead 84 is offered on the bottom wall of shut-off chamber 61 Pit 611.So, bushing 8 is effectively prevented in reality by the mutual cooperation of retention bead 84 and limit pits 611 Occur to be rotated around its axial direction in use process, it is ensured that import 81, the outlet 82 of bushing 8 are protected always with straight type runner 62 It is held in communication state.

Certainly, another Transform Type design as above-mentioned technical proposal, can also be provided with limit raised line on bushing 8, It is extended outwardly by the side wall of bushing 8.It is recessed that limit compatible with limit raised line is offered on the side wall of shut-off chamber 61 Slot.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.