Manual drain valve assembly with pre-pressure

Abstract

The utility model belongs to the technical field of plug-in valve bodies, and particularly relates to a manual drain valve assembly with pre-pressure, which comprises a plug-in valve body, an adjusting screw hole is arranged at the bottom of the plug-in valve body, a sealing cavity connected with the adjusting screw hole is arranged inside the plug-in valve body, a sealing cover is arranged on the upper portion of the plug-in valve body, and a valve rod is arranged on the plug-in valve body. A plug is slidably connected into the sealing cover, the upper end of the plug extends to the upper portion of the sealing cover, an adjusting bolt is arranged in the sealing cavity, an inner sealing groove is formed in the outer side of the adjusting bolt, a sealing piece is installed in the inner sealing groove, and the lower end of the adjusting bolt is in threaded connection with the adjusting screw hole. According to the plug-in type stop valve, the stop sealing function can be achieved, the function of a one-way valve can also be achieved, and compared with an existing plug-in type stop valve, the plug-in type stop valve has the advantages of being simple in structure and high in sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plug-in valve body, especially, relate to a manual discharge valve assembly with pre-pressure. BACKGROUND

[0002] The bottle opening of the vehicle high-pressure hydrogen cylinder needs to be installed with a hydrogen cylinder opening valve for controlling hydrogen charging and discharging. The performance of the hydrogen cylinder opening valve is extremely critical. As an important component, the plug-in type manual stop valve attracts much attention in technical development. Some plug-in valves on the market have single function and can only achieve stoppage, which is difficult to meet the complex use requirements of high-pressure hydrogen. Although some manual stop valves with one-way valve function can prevent backflow, the structure is complex, which not only increases the manufacturing difficulty and cost, but also makes installation and maintenance difficult, reducing the use convenience. Moreover, in the high-pressure hydrogen environment, the sealing performance of these valves is poor, hydrogen is easy to leak, and there are energy waste and serious safety hazards.

[0003] Therefore, it is very urgent to develop a plug-in type manual stop valve with simple structure, good sealing performance and both stoppage and one-way valve functions to meet the safety and performance requirements of the high-pressure hydrogen cylinder opening valve assembly. SUMMARY

[0004] In view of the above problems, the utility model provides a manual discharge valve assembly with pre-pressure, which solves the problems of single function of the manual stop valve in the prior art, complex structure of the stop valve with one-way valve function, and poor sealing performance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a manual discharge valve assembly with pre-pressure, comprising a plug-in valve body, a adjusting screw hole is formed in the bottom of the plug-in valve body, a sealing cavity connected with the adjusting screw hole is formed in the plug-in valve body, a cover is installed on the upper part of the plug-in valve body, a plug is slidably connected in the cover, the upper end of the plug extends to the upper part of the cover, an adjusting bolt is arranged in the sealing cavity, an inner sealing groove is formed on the outer side of the adjusting bolt, a sealing element is installed in the inner sealing groove, the lower end of the adjusting bolt is threadedly connected with the adjusting screw hole, the upper end of the adjusting bolt abuts against a spring, and the upper end of the spring abuts against the lower part of the plug.

[0006] Further, a sealing thread is formed on the outer side of the cover, a sealing thread hole is formed in the upper part of the plug-in valve body, and the cover and the plug-in valve body are threadedly and sealingly connected.

[0007] Further, an abutting groove one is formed on the lower side of the plug, an abutting groove two is formed on the upper end of the adjusting bolt, and the upper and lower ends of the spring are respectively abutted in the abutting groove one and the abutting groove two.

[0008] Further, the upper part of the cover is provided with a detection outlet, the lower side of the cover is provided with a mounting opening in communication with the detection outlet, the plug comprises a sealing head and an abutting portion, the abutting portion is located in the mounting opening, and the sealing head passes through the detection outlet and extends to the upper part of the cover.

[0009] Further, the sealing cavity has a diameter larger than that of the adjusting screw hole, the adjusting screw comprises a sealing column and an adjusting screw rod integrally connected to the lower end of the sealing column, the sealing column has a diameter larger than that of the adjusting screw rod, and a dustproof ring is arranged on the connecting position of the adjusting screw rod and the sealing column.

[0010] Further, the sealing member comprises an inner sealing ring and an inner sealing pad which are arranged in the inner sealing groove.

[0011] Further, the outer side of the plug-in valve body is provided with an outer sealing groove in the upper part, the outer sealing groove is provided with an outer sealing ring and an outer sealing pad, and the outer side of the plug-in valve body is provided with a screw thread in the lower part.

[0012] Compared with the prior art, the plug-in valve has the following beneficial effects:

[0013] The adjusting screw pushes the spring and compresses the air in the plug-in valve body, so that the pre-tightening force is applied to the plug, the plug abuts against the internal passage of the valve body to achieve the sealing effect, the air pressure in the internal passage of the valve body is greater than the pre-tightening force, and the pressure in the internal passage pushes the plug to achieve the effect of a one-way valve. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is an internal structure sectional view of the utility model;

[0015] Fig. 2 It is a three-dimensional structure schematic view of the utility model.

[0016] In the drawing: 1, plug-in valve body; 2, adjusting screw hole; 3, sealing cavity; 4, cover; 41, detection outlet; 42, mounting opening; 5, plug; 51, sealing head; 52, abutting portion; 6, adjusting screw; 61, sealing column; 62, adjusting screw rod; 7, inner sealing groove; 8, sealing member; 81, inner sealing ring; 82, inner sealing pad; 9, spring; 10, abutting groove one; 12, abutting groove two; 13, dustproof ring; 14, outer sealing groove; 141, outer sealing ring; 142, outer sealing pad. DETAILED DESCRIPTION

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figs. 1-2 As shown, a manual discharge valve assembly with pre-pressure includes a plug-in valve body 1, which is cylindrical. An adjusting screw hole 2 is provided at the bottom of the plug-in valve body 1. A sealing cavity 3 is provided inside the plug-in valve body 1 to connect to the adjusting screw hole 2. A cover 4 is installed on the upper part of the plug-in valve body 1. A plug 5 is slidably connected inside the cover 4, with the upper end of the plug 5 extending to the upper part of the cover 4. An adjusting bolt 6 is provided inside the sealing cavity 3. An inner sealing groove 7 is provided on the outer side of the adjusting bolt 6. A sealing element 8 is installed in the inner sealing groove 7. The lower end of the adjusting bolt 6 is threadedly connected to the adjusting screw hole 2. A spring 9 abuts against the upper end of the adjusting bolt 6, and the upper end of the spring 9 abuts against the lower part of the plug 5.

[0019] In this embodiment, the outer side of the cover 4 is provided with a sealing thread, and the upper part of the plug valve body 1 is provided with a sealing thread hole. The cover 4 and the plug valve body 1 are connected in a threaded sealing connection.

[0020] In this embodiment, the lower side of the plug 5 is provided with an abutment groove 10, the upper end of the adjusting bolt 6 is provided with an abutment groove 2 12, and the upper and lower ends of the spring 9 abut against the abutment groove 10 and the abutment groove 2 12 respectively.

[0021] In this embodiment, the upper part of the cover 4 is provided with an outlet 41, and the lower side of the cover 4 is provided with an installation port 42 communicating with the outlet 41. The plug 5 includes a sealing head 51 and an abutment part 52. The sealing head 51 and the abutment part 52 are integrally connected. The abutment part 52 is located in the installation port 42. The sealing head 51 passes through the outlet 41 and extends to the upper part of the cover 4. The upper part of the sealing head 51 is conical, and the conical side is inclined at a 120° angle to the upper side of the sealing head 51.

[0022] In this embodiment, the diameter of the sealing cavity 3 is larger than the diameter of the adjusting screw hole 2. The adjusting bolt 6 includes a sealing post 61 and an adjusting screw 62 integrally connected to the lower end of the sealing post 61. The diameter of the sealing post 61 is larger than the diameter of the adjusting screw 62. A dustproof ring 13 is provided at the connection between the adjusting screw 62 and the sealing post 61. A hexagonal screw hole is provided on the lower side of the adjusting screw 62 for convenient rotation of the adjusting bolt 6.

[0023] In the embodiment, the sealing member 8 comprises an inner sealing ring 81 and an inner sealing pad 82 installed in the inner sealing groove 7.

[0024] In the embodiment, an outer sealing groove 14 is formed on the outer upper portion of the plug-in valve body 1, and an outer sealing ring 141 and an outer sealing pad 142 are installed in the outer sealing groove 14.

[0025] In use, the plug-in valve body 1 is screwed into the main valve body through the thread, the adjusting screw bolt 6 is screwed into the hexagonal screw hole formed on the lower side of the screw rod 62, the adjusting screw bolt 6 pushes the spring 9 and compresses the air in the plug-in valve body 1, thereby exerting a pre-tightening force on the plug 5, and the upper end of the plug 5 abuts against the internal passage of the main valve body to achieve a sealing effect, and when the internal passage of the main valve body has a pressure greater than the pre-tightening force exerted on the plug 5 by the spring 9 and the compressed air, the plug 5 is pushed to open the internal passage of the main valve body, thereby achieving the effect of a one-way valve.

[0026] 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 principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A hand-operated drain valve assembly with pre-stress, comprising a plug-in valve body, characterized in that: The bottom of the plug-in valve body is provided with an adjusting screw hole, the inside of the plug-in valve body is provided with a sealing cavity connected with the adjusting screw hole, the upper part of the plug-in valve body is provided with a cover, the inside of the cover is slidably connected with a plug, the upper end of the plug extends to the upper part of the cover, the sealing cavity is provided with an adjusting bolt, the outside of the adjusting bolt is provided with an inner sealing groove, the inner sealing groove is provided with a sealing element, the lower end of the adjusting bolt is threadedly connected with the adjusting screw hole, the upper end of the adjusting bolt is abutted with a spring, and the upper end of the spring is abutted with the lower part of the plug.

2. The precharged manual drain valve assembly of claim 1, wherein: The outside of the cover is provided with a sealing thread, the upper part of the plug-in valve body is provided with a sealing thread hole, and the cover and the plug-in valve body are threadedly and sealingly connected.

3. The precharged manual drain valve assembly of claim 1, wherein: The lower side of the plug is provided with an abutment groove one, the upper end of the adjusting bolt is provided with an abutment groove two, and the upper and lower ends of the spring are respectively abutted in the abutment groove one and the abutment groove two.

4. The precharged manual drain valve assembly of claim 1, wherein: The upper part of the cover is provided with an exploration outlet, the lower side of the cover is provided with a mounting port communicated with the exploration outlet, the plug comprises a sealing head and an abutment part, the abutment part is located in the mounting port, and the sealing head passes through the exploration outlet and extends to the upper part of the cover.

5. The precharged manual drain valve assembly of claim 1, wherein: The diameter of the sealing cavity is greater than the diameter of the adjusting screw hole, the adjusting bolt comprises a sealing column and an adjusting screw rod integrally connected to the lower end of the sealing column, the diameter of the sealing column is greater than the diameter of the adjusting screw rod, and a dustproof ring is sleeved on the connection between the adjusting screw rod and the sealing column.

6. The precharged manual drain valve assembly of claim 1, wherein: The sealing element comprises an inner sealing ring and an inner sealing gasket which are sleeved and mounted in the inner sealing groove.

7. The precharged manual drain valve assembly of claim 1, wherein: The outer side of the plug-in valve body is provided with an outer sealing groove in the upper part, the outer sealing groove is provided with an outer sealing ring and an outer sealing gasket, and the outer side of the plug-in valve body is provided with a thread in the lower part.

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