阅读说明：本技术 一种特种气体用针形截止阀 (Needle-shaped stop valve for special gas ) 是由 杨波 王阳 于 2020-12-28 设计创作，主要内容包括：本发明涉及针形截止阀技术领域,具体揭示了一种特种气体用针形截止阀,包括阀体和阀杆,阀体内部的中央位置处开设有换气通道,换气通道的顶部贯穿阀体的顶部,阀体左右两侧分别开设有进气孔和出气孔,阀体内部且位于进气孔与换气通道之间的设置有进气通道,阀体内部且位于出气孔和换气通道之间的位置处设置有出气通道,阀体左右两侧的中央分别固定连接有第一连接管和第二连接管,阀体顶部的中央通过螺丝固定连接有锁紧机构,阀杆螺纹连接于锁紧机构的内部；本发明使得工作人员在拧完阀杆后,能够将两个把手向内折叠,有效的减小了把手占用的空间,能够有效避免外界物体撞击把手而导致阀杆转动的现象发生。(The invention relates to the technical field of needle-shaped stop valves, and particularly discloses a needle-shaped stop valve for special gas, which comprises a valve body and a valve rod, wherein a ventilation channel is formed in the central position inside the valve body, the top of the ventilation channel penetrates through the top of the valve body, the left side and the right side of the valve body are respectively provided with an air inlet hole and an air outlet hole, an air inlet channel is formed inside the valve body and positioned between the air inlet hole and the ventilation channel, an air outlet channel is formed inside the valve body and positioned between the air outlet hole and the ventilation channel, the centers of the left side and the right side of the valve body are respectively and fixedly connected with a first connecting pipe and a second connecting pipe, the center of the; according to the invention, after the valve rod is screwed, a worker can fold the two handles inwards, so that the space occupied by the handles is effectively reduced, and the phenomenon that the valve rod rotates due to the fact that an external object impacts the handles can be effectively avoided.)

1. A needle stop valve for special gas comprises a valve body and a valve rod, and is characterized in that a ventilation channel is arranged at the central position inside the valve body, the top of the ventilation channel penetrates through the top of the valve body, the left side and the right side of the valve body are respectively provided with a gas inlet hole and a gas outlet hole, a gas inlet channel is arranged inside the valve body and between the gas inlet hole and the ventilation channel, a gas outlet channel is arranged inside the valve body and between the gas outlet hole and the ventilation channel, the centers of the left side and the right side of the valve body are respectively and fixedly connected with a first connecting pipe and a second connecting pipe, the center of the top of the valve body is fixedly connected with a locking mechanism through screws, the valve rod is in threaded connection with the inside of the locking mechanism, the bottom of the valve rod extends to the inside of the ventilation channel and, the top fixedly connected with connecting piece of valve rod, the left and right sides of connecting piece all articulates through spring hinge has the handle.

2. The needle stop valve for special gas according to claim 1, wherein the right side of the gas inlet channel is communicated with the left side of the gas exchange channel and a position close to the top, the left side of the gas outlet channel is communicated with the right side of the gas exchange channel and a position close to the bottom, a limiting ring is fixedly connected to the inner wall of the gas exchange channel and a position close to the right bottom of the gas inlet channel, the inner diameter of the limiting ring is larger than the diameter of the needle valve head, the diameter of the piston is larger than the diameter of the limiting ring, the diameter of the piston is the same as the diameter of the gas exchange channel, and the outer wall of the piston is attached to the inner wall of the gas exchange channel.

3. The needle stop valve for special gases according to claim 1, wherein the locking mechanism comprises a connecting flange, a through hole is formed in the center of the top of the connecting flange, a second sealing ring is fixedly connected to the inner wall of the through hole, the valve rod penetrates through the through hole and is attached to the inner wall of the second sealing ring, four threaded holes are formed in the edge of the connecting flange, screws for fixing the valve rod to the top of the valve body are connected to the internal threads of the threaded holes through the threads, a first internal threaded column is fixedly connected to the center of the top of the connecting flange, a connecting ring is fixedly connected to the center of the top of the first internal threaded column, a second internal threaded column is fixedly connected to the center of the top of the connecting ring, and a sealing ring is fixedly connected to the top of the.

4. The needle stop valve for a specialty gas of claim 3, wherein a third seal ring and a fourth seal ring are fixedly connected to an inner wall of the connection ring and an inner wall of the sealing ring, respectively, and the valve stem penetrates through the inside of the connection ring and the sealing ring and is attached to the inner walls of the third seal ring and the fourth seal ring.

5. A needle stop valve for a specialty gas as defined by claim 3 wherein said valve stem is provided with threaded bosses on the surface thereof at locations corresponding to said first and second internally threaded posts, said valve stem being threadably connected to the interior of said first and second internally threaded posts by said two threaded bosses.

6. A needle stop valve for a specialty gas as defined in claim 3 wherein four ribs are fixedly attached to the surface of said first internally threaded post at locations close to the bottom of said first internally threaded post at equal intervals in a circular pattern with the center of said first internally threaded post as the origin, and the bottoms of said ribs are fixedly attached to the top of said coupling flange.

7. The needle stop valve for special gas according to claim 3, wherein a positioning frame is fixedly connected to a central position of the top of the valve body, a first sealing ring is fixedly connected to an inner wall of the positioning frame, and an outer wall of the connecting flange is attached to an inner wall of the first sealing ring.

8. The needle stop valve for a specialty gas as defined in claim 1, wherein said handle is cylindrical, an anti-slip cover is fixedly attached to a surface of said handle, and said handle and said valve stem form a "T" shape when said handle is extended.

Technical Field

The invention relates to the technical field of needle stop valves, in particular to a needle stop valve for special gas.

Background

The needle type stop valve is generally suitable for occasions with small load change or occasions with low requirements on speed stability, such as chemical instruments or gas conveying pipelines.

The valve body of traditional needle stop valve all is integrated into one piece processing or welded fastening, its valve rod only can reciprocate in the valve body is inside, can influence the holistic leakproofness of valve after the needle valve head of valve rod bottom receives wearing and tearing, the difficult dismantlement of valve rod and the change of traditional needle stop valve, just must dismantle whole valve if damaging, it is very complicated, and the valve rod top of needle stop valve often can set up and be T shape pole, although the design of T shape pole can let the staff very convenient twist the valve rod, but the holistic surface area of T shape pole is great, drive the valve rod rotation when receiving unexpected striking easily, and then the position that leads to the needle valve head changes, influence the gas tightness of valve body.

Disclosure of Invention

Aiming at the defects of the prior art, the needle-shaped stop valve for the special gas provided by the invention has the advantages that the valve rod is not easy to wear, the whole needle-shaped stop valve is convenient to maintain and the like, and the problems that the traditional needle-shaped stop valve is inconvenient to maintain and easy to leak gas are solved.

In order to achieve the purpose, the invention adopts the following technical scheme:

a needle stop valve for special gas comprises a valve body and a valve rod, wherein a ventilation channel is arranged in the central position inside the valve body, the top of the ventilation channel penetrates through the top of the valve body, an air inlet hole and an air outlet hole are respectively arranged on the left side and the right side of the valve body, an air inlet channel is arranged inside the valve body and between the air inlet hole and the ventilation channel, an air outlet channel is arranged inside the valve body and between the air outlet hole and the ventilation channel, a first connecting pipe and a second connecting pipe are respectively and fixedly connected with the center of the left side and the right side of the valve body, the center of the top of the valve body is fixedly connected with a locking mechanism through screws, the valve rod is in threaded connection with the inside of the locking mechanism, the bottom of the valve rod extends to the inside of the ventilation channel and is in threaded connection with a valve head, the left and right sides of the connecting piece are hinged with handles through spring hinges.

According to the invention, the right side of the air inlet channel is communicated with the position, close to the top, of the left side of the air exchange channel, the left side of the air outlet channel is communicated with the position, close to the bottom, of the right side of the air exchange channel, the position, close to the bottom, of the inner wall of the air exchange channel is fixedly connected with the limiting ring, the inner diameter of the limiting ring is larger than the diameter of the needle-shaped valve head, the diameter of the piston is larger than the diameter of the limiting ring, the diameter of the piston is the same as that of the air exchange channel, and the outer wall of the piston is attached to the inner wall of the air exchange channel.

According to the locking mechanism, the locking mechanism comprises the connecting flange, a through hole is formed in the center of the top of the connecting flange, a second sealing ring is fixedly connected to the inner wall of the through hole, the valve rod penetrates through the through hole and is attached to the inner wall of the second sealing ring, four threaded holes are formed in the edge of the connecting flange, screws used for being fixed to the top of the valve body are connected to the inner threads of the threaded holes in a threaded mode, a first internal threaded column is fixedly connected to the center of the top of the connecting flange, a connecting ring is fixedly connected to the center of the top of the first internal threaded column, a second internal threaded column is fixedly connected to the center of the top of the connecting ring, and a sealing ring is fixedly connected to the top of the second internal threaded column.

According to the invention, the inner wall of the connecting ring and the inner wall of the sealing ring are respectively and fixedly connected with the third sealing ring and the fourth sealing ring, and the valve rod penetrates through the connecting ring and the sealing ring and is attached to the inner walls of the third sealing ring and the fourth sealing ring.

According to the needle stop valve for the special gas, the threaded bulges are arranged on the surface of the valve rod and at the positions corresponding to the first internal threaded column and the second internal threaded column, and the valve rod is in threaded connection with the interiors of the first internal threaded column and the second internal threaded column through the two threaded bulges. This structure setting for the valve rod can be more stable fix inside locking mechanism, has improved the stability of valve rod.

According to the invention, four reinforcing ribs are fixedly connected to the surface of the first internal threaded column and close to the bottom of the first internal threaded column at equal intervals in a ring shape by taking the center of the first internal threaded column as an origin, and the bottoms of the reinforcing ribs are fixedly connected with the top of the connecting flange. This structural arrangement has strengthened the stability between first internal thread post and the flange.

According to the invention, the center position of the top of the valve body is fixedly connected with the positioning frame, the inner wall of the positioning frame is fixedly connected with the first sealing ring, and the outer wall of the connecting flange is attached to the inner wall of the first sealing ring. The structure is arranged, the integral air tightness of the device is improved, the positioning effect is achieved on the mounting position of the connecting flange, and convenience is brought to mounting of the connecting flange.

According to the invention, the handle is cylindrical, the surface of the handle is fixedly sleeved with the anti-skidding sleeve, and the handle and the valve rod form a T-shaped structure when the handle is unfolded. The structure is arranged, so that slipping when the handle is screwed can be prevented, and the handle is conveniently screwed by a worker.

Compared with the prior art, the needle-shaped stop valve for the special gas has the following beneficial effects:

1. according to the invention, the connecting piece is arranged at the top of the valve rod, and the handles hinged to the left end and the right end of the connecting piece through the spring hinges are matched, so that after a worker twists the valve rod, the two handles can be folded inwards, the space occupied by the handles is effectively reduced, the phenomenon that the valve rod rotates due to the fact that an external object impacts the handles can be effectively avoided, the stability of the valve body in working is improved, and the problem that the valve rod of the traditional stop valve is easy to collide and rotate is solved.

2. The valve body is provided with a connecting flange, the connecting flange is provided with a threaded hole, the whole locking mechanism can be detached from the valve body, a worker can conveniently take the valve rod out of the valve body, the needle valve head is in threaded connection with the bottom of the valve rod, the needle valve head can be directly replaced after being damaged, the problem that a traditional stop valve is inconvenient to maintain is solved, the piston is arranged on the surface of the needle valve head and matched with the arrangement that the outer wall of the piston is attached to the inner wall of the ventilation channel, the abrasion of the needle valve head and the inner wall of the ventilation channel can be prevented, and the needle valve head can be prevented from contacting with the bottom of the inner wall of the ventilation channel due to the excessive screwing of the valve rod by being matched with the limiting ring arranged on the inner wall of.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a front cross-sectional view of the handle of the present invention when deployed;

FIG. 2 is a schematic view of the overall front structure of the handle of the present invention when stored;

FIG. 3 is a front cross-sectional structural schematic view of the locking mechanism of the present invention;

FIG. 4 is a schematic view of the front side of the valve stem of the present invention;

fig. 5 is a schematic top view of the connector of the present invention.

In the figure: 1. a valve body; 2. a ventilation channel; 21. a limiting ring; 3. an air inlet; 31. a first connecting pipe; 4. an air intake passage; 5. an air outlet; 51. a second connecting pipe; 6. an air outlet channel; 7. a positioning frame; 71. a first seal ring; 8. a connecting flange; 81. a through hole; 82. a second seal ring; 83. a threaded hole; 9. a first internally threaded post; 91. reinforcing ribs; 10. connecting the circular rings; 101. a third seal ring; 11. a second internally threaded post; 12. sealing the circular ring; 121. a fourth seal ring; 13. a valve stem; 131. a needle-shaped valve head; 132. a piston; 14. a connecting member; 15. a handle; 151. an anti-slip sleeve.

Detailed Description

The needle stop valve for special gas according to the present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the descriptions related to "first", "second", etc. in the present invention are used for descriptive purposes only, not specifically for describing order or sequence, but also for limiting the present invention, and are merely used for distinguishing components or operations described in the same technical terms, and are not to be construed as indicating or implying any relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 5, the needle stop valve for special gas according to the present invention comprises a valve body 1 and a valve rod 13, wherein a ventilation channel 2 is formed at a central position inside the valve body 1, the top of the ventilation channel 2 penetrates the top of the valve body 1, an air inlet 3 and an air outlet 5 are respectively formed at left and right sides of the valve body 1, an air inlet channel 4 is formed inside the valve body 1 and between the air inlet 3 and the ventilation channel 2, an air outlet channel 6 is formed inside the valve body 1 and between the air outlet 5 and the ventilation channel 2, a first connecting pipe 31 and a second connecting pipe 51 are respectively fixedly connected to the centers of left and right sides of the valve body 1, a locking mechanism is fixedly connected to the center of the top of the valve body 1 through a screw, the valve rod 13 is threadedly connected to the inside of the locking mechanism, the bottom of the valve rod 13 extends to the inside of the ventilation channel 2 and is, the top of valve rod 13 is fixedly connected with connecting piece 14, and the left and right sides of connecting piece 14 all articulates through spring hinge has handle 15.

The right side of inlet channel 4 and the position department intercommunication that just is close to the top of passageway 2 left side of taking a breath, outlet channel 6's left side and the passageway 2 right side of taking a breath and the position department intercommunication that is close to the bottom, passageway 2 inner wall of taking a breath and the position department fixedly connected with spacing ring 21 that is close to inlet channel 4 right side bottom, the internal diameter of spacing ring 21 is greater than the diameter of aciculiform valve head 131, the diameter of piston 132 is greater than the diameter of spacing ring 21, the diameter of piston 132 is the same with the diameter of passageway 2 of taking a breath, the outer wall of piston 132 and the inner wall laminating of passageway 2 of taking a breath, the structure sets up, make gas can go up and go out down, avoid gas reflux, can improve the inside gas tightness of passageway 2 of taking a breath through the piston.

As shown in fig. 3, the locking mechanism includes flange 8, through-hole 81 has been seted up at the central authorities at flange 8 top, the inner wall fixedly connected with second sealing washer 82 of through-hole 81, valve rod 13 passes through-hole 81 and laminates with the inner wall of second sealing washer 82, four screw holes 83 have been seted up at flange 8's edge, the internal thread connection of screw hole 83 has the screw that is used for fixing mutually with 1 top of valve body, the first internal thread post 9 of central fixedly connected with at flange 8 top, the central fixedly connected with at first internal thread post 9 top connects ring 10, the central fixedly connected with second internal thread post 11 at connection ring 10 top, the top fixedly connected with sealing ring 12 of second internal thread post 11, the structure sets up, make things convenient for the staff to dismantle and install locking mechanism.

The inner wall of the connecting ring 10 and the inner wall of the sealing ring 12 are fixedly connected with a third sealing ring 101 and a fourth sealing ring 121 respectively, the valve rod 13 penetrates through the inner parts of the connecting ring 10 and the sealing ring 12 and is attached to the inner walls of the third sealing ring 101 and the fourth sealing ring 121, and the structure improves the overall sealing performance of the device.

Valve rod 13 surface and the position department that corresponds with first internal thread post 9 and second internal thread post 11 all is provided with the screw thread arch, and valve rod 13 is through the inside of two protruding threaded connection of screw thread in first internal thread post 9 and second internal thread post 11, and this structure sets up for valve rod 13 can be more stable fix inside locking mechanism, has improved valve rod 13's stability.

The position department on the first internal thread post 9 surface and near the bottom uses the center of first internal thread post 9 as four strengthening ribs 91 of equidistance fixedly connected with of initial point annular, the bottom of strengthening rib 91 and flange 8's top looks fixed connection, and this structure setting has strengthened the stability between first internal thread post 9 and the flange 8.

The central point at valve body 1 top puts fixedly connected with positioning frame 7, and positioning frame 7's the first sealing washer 71 of inner wall fixedly connected with, the outer wall of flange 8 and the inner wall laminating of first sealing washer 71, and this structure setting has improved the holistic gas tightness of the device, has played the positioning action to flange 8's mounted position simultaneously, provides convenience for installing flange 8.

The handle 15 is cylindric, and the fixed surface of handle 15 has cup jointed anti-skidding cover 151, and handle 15 forms "T" shape structure with valve rod 13 when expanding, and this structural setting can prevent to twist and skid when moving handle 15, makes things convenient for the staff to twist and moves handle 15.

When the valve rod 13 needs to be screwed, a worker firstly turns the two handles 15 upwards and turns the handles 15 up, so that the two handles 15 and the valve rod 13 form a T-shaped rod, then the valve rod 13 can be screwed to adjust the position of the needle-shaped valve head 131, the flow of the air inlet channel 4 is further changed, after the adjustment is finished, the worker turns the two handles 15 downwards, the handles 15 are folded and stored, and the valve rod 13 can be prevented from being rotated after being impacted.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.