CN213512114U

CN213512114U - Anti-loosening low-temperature needle valve

Info

Publication number: CN213512114U
Application number: CN202022208272.4U
Authority: CN
Inventors: 朱琪飞; 崔娜; 李金梁
Original assignee: Shanghai Tingben Fluid Control Co ltd
Current assignee: Shanghai Tingben Fluid Control Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-06-22
Anticipated expiration: 2030-09-30

Abstract

The utility model relates to a low temperature valve technical field discloses an anti-loosening low temperature needle valve. This kind of locking low temperature needle valve that moves includes: disk seat, cooperation chamber, valve gap, screw rod, first valve plug, through-hole, fixed plate, supporting spring and the disk seat is equipped with the cooperation chamber, the inside bottom of disk seat is provided with the cooperation chamber, the central point at disk seat top puts the department and is provided with rather than matched with valve gap, the inside central point of valve gap puts the department and is provided with the screw rod. This kind of locking low temperature needle valve that moves when using, through the multiunit through-hole when first valve plug open mode is less, makes high pressure medium pass through from the through-hole is inside, can not pass through from the toper gap in the first valve plug outside, when effectually having avoided the inside circulation high pressure medium of cooperation chamber, to the disturbance that first valve plug takes place, the flow of better accurate control high pressure medium, through setting up multiunit supporting spring, when rotating the screw rod, supporting spring pushes up the fixed plate all the time.

Description

Anti-loosening low-temperature needle valve

Technical Field

The utility model relates to a low temperature valve technical field specifically is an anti-loosening low temperature needle valve.

Background

The needle valve is a fine adjustment valve, a valve plug of the needle valve is in a needle shape and is mainly used for adjusting gas flow, the fine adjustment valve requires that a valve port is opened to be gradually enlarged and can be continuously and finely adjusted from closing to opening, the needle valve is a valve which can be accurately adjusted, the application is wide, for example, the cutting distance for flame cutting is adopted, a knob for adjusting the flame temperature is the needle valve, and a valve core of the needle valve is a sharp cone.

The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and mainly plays a role in cutting off and throttling on a pipeline. The needle valve in the prior art can bear higher pressure and has good sealing performance than other types of valves, so the needle valve is generally used for sealing gas or liquid medium with smaller flow and higher pressure.

However, most of needle valves in the prior art drive the valve plug through the screw rod and rotate, then adjust the size that the valve port was opened with the rising through the valve plug, the size that the valve port was opened all is through toper valve plug direct control, when the open mode is less, high-pressure gas is through when comparatively narrow and small toper gap, the stability of valve plug is not enough, and when rotatory screw rod control flow size, the screw rod takes place to become flexible very easily, and then lead to the valve plug not hard up, unable accurate control flows, it is comparatively troublesome.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a locking low temperature needle valve that moves to valve plug and screw rod in solving above-mentioned background are stable inadequately, the problem of unable accurate control flow.

In order to achieve the purpose, the utility model provides a locking low temperature needle valve which is characterized in that the locking low temperature needle valve comprises a valve seat, a matching cavity, a valve cover, a screw rod, a first valve plug, a through hole, a fixing plate, a supporting spring and a matching cavity arranged on the valve seat;

the bottom end in the valve seat is provided with a matching cavity, the center position of the top of the valve seat is provided with a valve cover matched with the valve seat, and the center position in the valve cover is provided with a screw rod;

a first valve plug which extends into the matching cavity and is matched with the matching cavity is fixedly arranged at the central position of the bottom of the screw rod, and a plurality of groups of through holes are uniformly formed in the periphery of the outer side of the first valve plug;

the top of the outer side of the screw rod is fixedly provided with a fixing plate in the valve cover, and the bottom of the fixing plate is fixedly provided with supporting springs around the screw rod. Through the multiunit through-hole when first valve plug open mode is less, make high pressure medium pass through from the through-hole is inside, can not pass through from the toper gap in the first valve plug outside, when the effectual cooperation intracavity portion circulation high pressure medium of having avoided, to the disturbance that first valve plug takes place, the flow of better accurate control high pressure medium, through setting up multiunit supporting spring, when rotating the screw rod, supporting spring pushes up the tight fixed plate all the time, and then makes the screw rod fixed more stable, it is comparatively convenient.

Preferably, the fixed sliding block that is provided with in bottom of spring, the inside bottom of sliding block is rotated and is connected with the ball that extends to the inside of valve gap, and the inside sliding tray that is provided with of valve gap with ball matched with, has the ball through the bottom swing joint at the sliding block, makes the sliding block rotate more smoothly.

Preferably, the inside both sides of disk seat are provided with input tube and the output tube that is linked together with the cooperation chamber respectively, and input tube and output tube port inboard are provided with the rubber circle, and through setting up input tube and output tube, it is convenient the utility model discloses be linked together with external equipment.

Preferably, the screw rod outside is located the inside fixed limiting plate that is provided with and sliding block matched with of valve gap, and the inboard of limiting plate be provided with sliding block matched with rubber pad, through setting up the limiting plate, when the screw rod rotated, can drive the limiting plate and rotate, and then the limiting plate drives the sliding block and rotates, makes the sliding block rotate comparatively stably.

Preferably, the outside at screw rod top is provided with the screw thread that extends to the inside of valve gap, and the inside top of valve gap be provided with screw thread matched with thread groove, through setting up the screw thread, make things convenient for screw rod and valve gap cooperation to be connected, and then can drive first valve plug and rise the decline.

Preferably, the valve bonnet bottom is provided with the sealing washer with disk seat matched with, and the cross-section of sealing washer is the ring form, the outside that the disk seat both sides are located input tube and output tube is provided with the cooperation groove, and the cooperation inslot side is provided with the rubber circle, and through setting up the sealing washer, it is inseparabler to make the cooperation between valve bonnet and the disk seat, sets up the cooperation groove, and the convenience is connected with external equipment pipeline.

Preferably, the inside central point of screw rod puts the fixed dead lever that extends to its top that is provided with of department, the fixed carousel that is provided with in dead lever top, the fixed spacing collar that is provided with in the outside of carousel bottom extends to the valve gap inside and rotates the connection with the valve gap, and the valve gap top be provided with spacing collar matched with spacing groove, the utility model discloses a set up the carousel, conveniently rotate screw rod 6.

Preferably, one side at carousel top is provided with the instruction piece, the outside at valve gap top evenly is provided with multiunit and instructs piece matched with angle piece, the outside that the valve gap top is located the angle piece is provided with angle piece matched with fixed cover, through setting up angle piece and instruction piece, conveniently rotates the screw rod through angle of adjustment.

Preferably, cooperation chamber one side is located inside the disk seat and is provided with the blast pipe that is linked together with the external world, the bottom of blast pipe is provided with sealing screw, through setting up the blast pipe, conveniently to the inside pressure release that exhausts of cooperation intracavity.

Drawings

Fig. 1 is a transverse sectional view of embodiment 1 of the present invention;

fig. 2 is a longitudinal sectional view in embodiment 1 of the present invention;

fig. 3 is a schematic structural view of the whole of embodiment 1 of the present invention;

fig. 4 is a schematic structural view of a first valve plug according to embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a first valve plug according to embodiment 2 of the present invention;

fig. 6 is a sectional view of a second valve flap according to embodiment 2 of the present invention.

In the figure: 1. a valve seat; 2. a mating cavity; 3. an input tube; 4. an output pipe; 5. a valve cover; 6. a screw; 7. a first valve plug; 8. a first valve plug; 801. a compression spring; 802. a fitting head; 9. a through hole; 10. a fixing plate; 11. a support spring; 12. a ball bearing; 13. a slider; 14. a limiting plate; 15. a thread; 16. fixing the rod; 17. a limiting ring; 18. an angle block; 19. an indication block; 20. fixing a sleeve; 21. a mating groove; 22. a seal ring; 23. an exhaust pipe; 24. a seal screw; 25. a turntable.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

As described in the background of the present application, when high pressure gas passes through a narrow tapered gap in the prior art, the stability of the valve plug is not sufficient, and the screw is easily loosened, so that the flow rate is not accurate enough.

The utility model discloses the people discovery causes the relatively poor and easy not hard up leading cause of screw rod of valve plug stability is that the valve plug is less with the inside cooperation chamber of disk seat gap when the circulation medium, and high-pressure medium makes the valve plug unstable easily, and the screw rod is not hard up easily and is the screw rod when rotating the back and stop, does not have the fixed knot structure to the screw rod.

In order to solve the above problems, the present application of the present invention provides a technical solution, which comprises the following specific embodiments:

example 1

A check low temperature needle valve, as shown in fig. 1-4, comprising: the valve seat 1, the matching cavity 2, the valve cover 5, the screw rod 6, the first valve plug 7, the through hole 9, the fixing plate 10, the supporting spring 11 and the valve seat 1 are provided with the matching cavity 2; a matching cavity 2 is arranged at the bottom end inside the valve seat 1, a valve cover 5 matched with the valve seat 1 is arranged at the center of the top of the valve seat 1, and a screw rod 6 is arranged at the center of the inside of the valve cover 5; a first valve plug 7 which extends into the matching cavity 2 and is matched with the matching cavity 2 is fixedly arranged at the central position of the bottom of the screw rod 6, and a plurality of groups of through holes 9 are uniformly formed in the periphery of the outer side of the first valve plug 7; the top end of the outer side of the screw rod 6 is positioned in the valve cover 5 and is fixedly provided with the fixing plate 10, the bottom of the fixing plate 10 is positioned around the screw rod 6 and is fixedly provided with the supporting spring 11, through the content, in the process of using the utility model, the input pipe 3 and the output pipe 4 at the two sides of the valve seat 1 are respectively connected with the external equipment, the first valve plug 7 is provided with the through holes 9 all around, when the screw rod 6 is rotated to drive the first valve plug 7 to rise, the through holes 9 respectively communicate the matching cavity 2 with the input pipe 3 and the output pipe 4, then the gradual opening of the through holes 9 can effectively avoid the high pressure medium from passing through the first valve plug 7, the high pressure disturbance caused to the first valve plug 7 can be avoided, the effect of the multiple groups of through holes 9 can be realized, when the opening state of the first valve plug 7 is smaller, the high pressure medium can be, when the screw rod 6 rotates and rises, the fixing plate 10 drives the four groups of supporting springs 11 to rotate inside the valve cover 5, when the screw rod 6 stops rotating, the bottoms of the four groups of supporting springs 11 support the inner side of the valve cover 5 through the balls 12, and then the reaction force of the supporting springs fixes the fixing plate 10, so that the screw rod 6 cannot be loosened and is stable.

In this embodiment, the fixed dead lever 16 that extends to its top that is provided with in the inside central point of screw rod 6 department of putting, the fixed carousel 25 that is provided with in dead lever 16 top, the outside of carousel 25 bottom is fixed to be provided with and extends to valve gap 5 inside and rotate the spacing collar 17 of being connected with valve gap 5, and valve gap 5 top is provided with the spacing groove with spacing collar 17 matched with, one side at carousel 25 top is provided with instruction piece 19, the outside at valve gap 5 top evenly is provided with multiunit and instruction piece 19 matched with angle piece 18, the outside that valve gap 5 top is located angle piece 18 is provided with the fixed cover with angle piece 18 matched with, when instructing piece 19 and angle piece 18 corresponding, can carry out the angle adjustment of controlling when rotating screw rod 6, it is more accurate when making to rotate screw rod 6, and is comparatively convenient.

Secondly, the exhaust pipe 23 communicated with the outside is arranged on one side of the matching cavity 2 and inside the valve seat 1, the sealing screw 24 is arranged at the bottom of the exhaust pipe 23, and the exhaust pipe 23 is arranged to discharge the pressure inside the matching cavity 2.

Further, a sliding block 13 is fixedly arranged at the bottom of the supporting spring 11, an input pipe 3 and an output pipe 4 which are communicated with the matching cavity 2 are respectively arranged at two sides inside the valve seat 1, rubber rings are arranged at the inner sides of the ports of the input pipe 3 and the output pipe 4, a limiting plate 14 which is matched with the sliding block 13 is fixedly arranged at the outer side of the screw rod 6 inside the valve cover 5, a rubber pad which is matched with the sliding block 13 is arranged at the inner side of the limiting plate 14, a ball which extends to the inside of the valve cover is rotatably connected to the bottom end inside the sliding block, a sliding groove which is matched with the ball is arranged inside the valve cover, the sliding block 13 can be driven to rotate by arranging the limiting plate 14 while the screw rod 6 rotates, the sliding block 13 is simultaneously matched with the ball 12 which is movably connected at the bottom of the sliding, and sealing washer 22's cross-section is the ring form, the outside that 1 both sides of disk seat are located input tube 3 and output tube 4 is provided with cooperation groove 21, and cooperation groove 21 inboard is provided with the rubber circle, sets up sealing washer 22 and rubber pad, makes the utility model discloses a leakproofness is better.

In addition, the outside at the top of screw rod 6 is provided with the screw thread 15 that extends to the inside of valve gap 5, and the inside top of valve gap 5 is provided with the thread groove with screw thread 15 matched with, sets up screw thread 15, conveniently makes screw rod 6 and valve gap 5 carry out threaded connection, and is comparatively stable.

Example 2

Fig. 5 and 6 are a schematic structural diagram and a cross-sectional view of a first valve plug 8 in embodiment 2 of the present invention, and embodiment 2 is an alternative solution based on embodiment 1, and the difference lies in that: utilize first valve plug 8 to replace first valve plug 7 for first valve plug 8 replaces first valve plug 7 to install in the central point department of the screw rod 6 bottom, as shown in fig. 5, the inside bottom mounting of first valve plug 8 is provided with pressure spring 801, pressure spring 801's bottom mounting is provided with the cooperation head 802 with cooperation chamber 2 matched with.

It is worth explaining that, when the screw rod 6 drives the first valve plug 8 to rise, the hold-down spring 801 further supports the matching head 802 to continue to press down, so that the matching head 802 presses into the matching head groove at the bottom end inside the matching cavity 2, and when the matching cavity 2 passes through a high-pressure medium, the first valve plug 8 cannot shake, so that the high stability of the first valve plug 8 is effectively maintained, and the device is practical.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A low-temperature needle valve capable of preventing looseness is characterized by comprising a valve seat, a matching cavity, a valve cover, a screw, a first valve plug, a through hole, a fixing plate, a supporting spring and a matching cavity arranged on the valve seat;

the top of the outer side of the screw rod is fixedly provided with a fixing plate in the valve cover, and the bottom of the fixing plate is fixedly provided with supporting springs around the screw rod.

2. The anti-loosening low temperature needle valve according to claim 1, wherein: the fixed sliding block that is provided with in bottom of spring, the inside bottom of sliding block is rotated and is connected with the ball that extends to the valve gap inside, and the valve gap inside be provided with ball matched with sliding tray.

3. The anti-loosening low temperature needle valve according to claim 1, wherein: and an input pipe and an output pipe which are communicated with the matching cavity are respectively arranged on two sides inside the valve seat, and rubber rings are arranged on the inner sides of the ports of the input pipe and the output pipe.

4. The anti-loosening low temperature needle valve according to claim 1, wherein: the screw rod outside is located inside fixed limiting plate that is provided with and sliding block matched with of valve gap, and the inboard of limiting plate is provided with the rubber pad with sliding block matched with.

5. The anti-loosening low temperature needle valve according to claim 1, wherein: the outside at screw rod top is provided with the screw thread that extends to the inside of valve gap, and the inside top of valve gap is provided with the thread groove with screw thread matched with.

6. The anti-loosening low temperature needle valve according to claim 5, wherein: the bottom of the valve cover is provided with a sealing ring matched with the valve seat, the cross section of the sealing ring is in a ring shape, matching grooves are formed in the outer sides, located on the input pipe and the output pipe, of the two sides of the valve seat, and rubber rings are arranged on the inner sides of the matching grooves.

7. The anti-loosening low temperature needle valve according to claim 1, wherein: the fixed dead lever that extends to its top that is provided with of the inside central point department of putting of screw rod, the fixed carousel that is provided with in dead lever top, the fixed spacing collar that is provided with in the outside of carousel bottom extends to the valve gap inside and rotates with the valve gap and be connected, and the valve gap top is provided with the spacing groove with spacing collar matched with.

8. The anti-loosening low temperature needle valve according to claim 7, wherein: one side at carousel top is provided with the instruction piece, the outside at valve gap top evenly is provided with multiunit and instructs piece matched with angle piece, the outside that the valve gap top is located the angle piece is provided with the fixed cover with angle piece matched with.

9. The anti-loosening low temperature needle valve according to claim 1, wherein: and an exhaust pipe communicated with the outside is arranged in the valve seat on one side of the matching cavity, and a sealing screw is arranged at the bottom of the exhaust pipe.

10. The anti-loosening low temperature needle valve according to claim 1, wherein: the bottom fixing of the inside of first valve plug is provided with pressure spring, pressure spring's bottom is fixed be provided with cooperation chamber matched with cooperation head.