Manual gas stop valve

Abstract

The utility model belongs to the technical field of valve bodies, and particularly relates to a manual gas stop valve which comprises a valve body, a valve element and a sealing plug, the lower end of the sealing plug is connected with the upper end of the valve element, a valve element hole is formed in the center of the valve body, and the valve element hole sequentially comprises an upper threaded hole, a sealing hole and a lower threaded hole from top to bottom. The upper end of the valve element is in threaded connection with the upper threaded hole, the middle of the valve element is in clearance fit with the sealing hole, the lower end of the valve element is in threaded connection with the lower threaded hole, a first sealing groove is formed in the middle of the valve element, and a first sealing piece is installed in the first sealing groove. A valve body external thread is arranged on the side face of the valve body, a tail baffle ring is arranged on the edge of the bottom of the valve body, a third sealing groove is formed in the bottom of the valve body external thread, and a third sealing piece is arranged in the third sealing groove. The sealing device is simple in structure, reliable in sealing and capable of effectively preventing the threads from being aged and damaging the sealing effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve body technical field, especially, relate to a kind of manual gas stop valve. BACKGROUND

[0002] Manual stop valve as the key component of control fluid in pipeline system, its sealing performance and reliability directly influence the safety and economy of system operation, since hydrogen gas molecular weight is small, permeability is strong, the sealing structure of existing valve faces special challenge in long-term use, such as the high-pressure hydrogen gas manual stop valve of the Chinese utility model patent for grant patent announcement No.CN211117667U, only by the O-ring between valve stem, when O-ring aging or deformation occurs, cannot determine effective prevention hydrogen gas overflow leakage, simultaneously, existing sealing structure cannot effectively prevent thread aging, oxide produced by thread aging is easy to contact O-ring damage sealing ring, so a kind of structure simple, can effectively seal, can effectively prevent thread aging manual gas stop valve is needed. SUMMARY

[0003] For the above problems, the utility model provides a kind of manual gas stop valve, and the sealing structure in prior art cannot effectively prevent hydrogen gas overflow leakage, simultaneously, the problem that stop valve thread is easy to age is well solved.

[0004] In order to realize the above purpose, the technical scheme adopted by the utility model is as follows: a kind of manual gas stop valve, including valve body, valve core and sealing plug, the lower end of the sealing plug is connected with the upper end of valve core, the center of the valve body is provided with valve core hole, the valve core hole is sequentially included from top to bottom upper thread hole, sealing hole and lower thread hole, the lower end of the lower thread hole is communicated with the lower end of valve body, the upper end of the valve core is connected with the upper thread hole, the middle part of the valve core is gap fit with the sealing hole, the lower end of the valve core is connected with the lower thread hole, the middle part of the valve core is provided with sealing groove one, sealing piece one is installed in the sealing groove one, the upper part of the valve body is provided with sealing groove two outside, sealing piece two is installed in the sealing groove two, the lower of the sealing groove two is provided with valve body outer thread located on the side of valve body, the bottom edge of the valve body is provided with tail blocking ring, the bottom of the valve body outer thread is provided with sealing groove three, sealing piece three is arranged in the sealing groove three.

[0005] Further, the upper end of the valve core is provided with plug mounting groove, and the lower end of the sealing plug is threadedly connected with the plug mounting groove.

[0006] Further, the upper end edge of the sealing plug is provided with sealing chamfer.

[0007] Further, the included angle between the sealing chamfer and the upper side surface of the sealing plug is 118°.

[0008] Further, the bottom of the valve core is provided with a hexagonal bolt hole.

[0009] Further, the lower end of the valve core is sleeved with a dust gasket, and the lower side of the dust gasket is attached to the bottom of the sealing hole.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The sealing groove two and the sealing groove three cooperate with the sealing piece two and the sealing piece three, so that the valve body outer thread is in a sealed isolation state, the valve body outer thread is prevented from aging, the sealing piece three can also serve as a secondary sealing piece to prevent hydrogen leakage when the sealing piece two fails, the sealing piece three is more convenient to replace, the bottom of the valve core is sleeved with a dust gasket, iron oxide chips caused by thread aging are prevented from contacting the sealing piece one, and the sealing piece one is prevented from being damaged to cause sealing failure. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an internal structure sectional view of the utility model.

[0013] In the drawing: 1, valve body; 2, valve core; 3, sealing plug; 4, valve core hole; 41, upper threaded hole; 42, sealing hole; 43, lower threaded hole; 5, sealing piece one; 6, sealing piece three; 7, plug mounting groove; 8, sealing chamfer; 9, hexagonal bolt hole; 10, dust gasket; 11, bottle mouth valve; 12, sealing piece two; 13, valve body outer thread; 14, tail blocking ring. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0015] For example, Figure 1As shown, a manual gas stop valve comprises a valve body 1, a valve core 2 and a sealing plug 3, the lower end of the sealing plug 3 is connected with the upper end of the valve core 2, the center of the valve body 1 is provided with a valve core hole 4, the valve core hole 4 is obtained by vertical downward passing of CNC processing perpendicular to the center of the valve body 1, the valve core hole 4 comprises an upper threaded hole 41, a sealing hole 42 and a lower threaded hole 43 from top to bottom, the diameter of the upper threaded hole 41 is larger than that of the sealing hole 42, the diameter of the sealing hole 42 is larger than that of the lower threaded hole 43, the lower end of the lower threaded hole 43 is communicated with the lower end of the valve body 1, the inner wall of the upper threaded hole 41 and the lower threaded hole 43 is provided with internal threads, the upper end of the valve core 2 is threadedly connected with the upper threaded hole 41, the middle part of the valve core 2 is clearance fitted with the sealing hole 42, the lower end of the valve core 2 is threadedly connected with the lower threaded hole 43, the middle part of the valve core 2 is provided with a sealing groove one, the sealing groove one can be multiple, the multiple sealing grooves one are spaced apart upward and downward, sealing pieces one 5 are arranged in the sealing groove one, the outer side of the upper part of the valve body 1 is provided with a sealing groove two, sealing pieces two 12 are arranged in the sealing groove two, the sealing groove two is provided with a valve body external thread 13 located on the side of the valve body 1, the bottom edge of the valve body 1 is integrally connected with a tail blocking ring 14, the bottom of the valve body external thread 13 is provided with a sealing groove three, sealing pieces three 6 are arranged in the sealing groove three, the sealing piece one 5 and the sealing piece two 12 are sealed in the mode of plastic sealing gasket plus O-shaped rubber ring.

[0016] In the embodiment, the upper end of the valve core 2 is provided with a plug mounting groove 7, the inner wall of the plug mounting groove 7 is provided with internal threads, the lower end of the sealing plug 3 is provided with external threads matched with the plug mounting groove 7, and the lower end of the sealing plug 3 is threadedly connected with the plug mounting groove 7.

[0017] In the embodiment, the upper end edge of the sealing plug 3 is provided with a sealing chamfer 8 through CNC processing.

[0018] In the embodiment, the included angle between the sealing chamfer 8 and the upper side surface of the sealing plug 3 is 118°.

[0019] In the embodiment, the bottom of the valve core 2 is provided with a hexagonal bolt hole 9.

[0020] In the embodiment, the lower end of the valve core 2 is sleeved with a dust gasket 10, the inner diameter of the dust gasket 10 is clearance fitted with the valve core 2, the outer diameter of the dust gasket 10 is clearance fitted with the inner wall of the sealing hole 42, and the lower side surface of the dust gasket 10 is attached to the bottom of the sealing hole 42.

[0021] When the utility model is used, like Figure 1After the installation is shown, the valve body outer thread 13 is screwed with the bottle mouth valve 11, at this time, the sealing element two 12 and the sealing element three 6 are attached to the bottle mouth valve 11 to form an outer seal, the sealing element one 5 is attached to the valve body 1 to form an inner seal, the hexagonal bolt hole 9 arranged at the bottom of the valve core 2 can be inserted into the hexagonal bolt to rotate the valve core 2, so that the valve core 2 drives the sealing plug 3 to move up and down, and the sealing plug 3 abuts against the channel inside the bottle mouth valve 11 to seal and manually cut off the seal.

[0022] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A manual gas stop valve characterised in that: The utility model provides a valve, including valve body (1), valve core (2) and sealing plug (3), the lower end of sealing plug (3) is connected with the upper end of valve core (2), the center of valve body (1) is set up valve core hole (4), valve core hole (4) from top to bottom includes upper threaded hole (41), sealing hole (42) and lower threaded hole (43) in proper order, the lower end of lower threaded hole (43) communicates with the lower end of valve body (1), the upper end of valve core (2) is connected with upper threaded hole (41) threadedly, the middle part of valve core (2) is matched with sealing hole (42) gap, the lower end of valve core (2) is connected with lower threaded hole (43) threadedly, the middle part of valve core (2) is set up sealing groove one, sealing piece one (5) is installed in sealing groove one, the upper part outside of valve body (1) is set up sealing groove two, sealing piece two (12) is installed in sealing groove two, the lower of sealing groove two is provided with the valve body outer thread (13) in the side of valve body (1), the bottom edge of valve body (1) is provided with tail baffle ring (14), the bottom of valve body outer thread (13) is set up sealing groove three, sealing piece three (6) is arranged in sealing groove three.

2. The manual gas shutoff valve of claim 1, wherein: The upper end of valve core (2) is set up plug mounting groove (7), the lower end of sealing plug (3) is connected with plug mounting groove (7) threadedly.

3. The manual gas shutoff valve of claim 1, wherein: The upper end edge of sealing plug (3) is provided with sealing chamfer (8).

4. The manual gas shutoff valve of claim 3, wherein: The included angle between sealing chamfer (8) and the upper side of sealing plug (3) is 118 °.

5. The manual gas shutoff valve of claim 1, wherein: The bottom of valve core (2) is provided with hexagonal bolt hole (9).

6. The manual gas shutoff valve of claim 1, wherein: The lower end of valve core (2) is provided with dustproof gasket (10), the lower side of dustproof gasket (10) is attached with the bottom of sealing hole (42).

Images