CN212107073U - Ultra high pressure back pressure valve - Google Patents

Abstract

The utility model discloses an ultra-high pressure back pressure valve, which relates to the technical field of ultra-high pressure valves. In order to solve the structural reasons of the ultra-high pressure back pressure valve in the prior art, the pressure balance is weak, the fluctuation is large, and the sensitivity is low. Problems such as the inability to quickly provide stable back pressure. The lower end of the valve body is provided with a lower seat, the inside of the lower seat is provided with a valve plug, the lower part of the valve plug is provided with a right-angle combined seal at the connection between the lower joint and the valve plug, and the lower joint is provided with a right-angle combined seal. A locking nut is arranged on the outer wall, a first pressure cap and a pressure pad are arranged above the locking nut, a connecting head is arranged on the outer wall of one side of the lower seat, and an upper joint is arranged on the upper end of the valve body A compression nut is arranged on the outer wall of the upper joint, a piston is arranged at the lower end of the upper joint, a valve needle is arranged inside the piston, and an extension gland is arranged on the outer wall of one side of the valve body.

Description

Ultra high pressure back pressure valve

technical field

The utility model relates to the technical field of ultra-high pressure valves, in particular to an ultra-high pressure back pressure valve.

Background technique

A valve is a device that uses a moving part to open, close or partially block one or more openings or passages, so that liquid, air or other air flows can flow out, block or be regulated; the so-called valve core is a The moving parts in the valve body, when the working pressure of the ultra-high pressure valve is equal to or higher than 98.1MPa, the general diameter range is 3~40mm, and the operating temperature is ≤300℃. Lifting valve stem is used to prevent the sealing surface from being scratched; the valve stem sealing structure is composed of fluoroplastic molding packing and metal, and the main force-bearing parts are made of high-strength, high-toughness, high-quality low-alloy steel, suitable for In petroleum, chemical and other hydraulic pipelines, it is used as an overpressure protection device for equipment.

Due to the structure of the existing ultra-high pressure back pressure valve, its pressure balance is weak, the fluctuation is large, the sensitivity is low, and it cannot quickly provide a stable back pressure pressure. Therefore, it is urgent to provide a technology that can solve the above problems. Problem with the ultra-high pressure back pressure valve.

Utility model content

The purpose of this utility model is to provide an ultra-high pressure back pressure valve, which is used to solve the problem that the existing ultra-high pressure back pressure valve has weak pressure balance, large fluctuation and low sensitivity due to its structural reasons, and cannot be quickly provided. Technical issues such as stable back pressure.

In order to achieve the above purpose, the present invention provides the following technical solutions: an ultra-high pressure back pressure valve, including a valve body, a lower seat is arranged at the lower end of the valve body, a valve plug is arranged inside the lower seat, and the valve plug is The lower part is provided with a right-angle combined seal at the connection between the lower joint and the valve plug, a locking nut is arranged on the outer wall of the lower joint, and a first pressure cap and a pressure pad are arranged above the locking nut. A connecting head is arranged on the outer wall of one side of the lower seat, an upper joint is arranged on the upper end of the valve body, a compression nut is arranged on the outer wall of the upper joint, and a piston is arranged at the lower end of the upper joint. A valve needle is arranged inside, an extension gland is arranged on one outer wall of the valve body, a pipeline is arranged inside the extension gland, and one end of the pipeline is fixedly connected to the inside of the extension gland through a pipeline nut sleeve.

Preferably, connecting holes are provided on the inner two outer walls of the lower joint, a valve plate mounting hole is arranged inside the lower joint, and the valve plate mounting hole and the two connecting holes are located on the same horizontal line. A fixing rod is arranged inside the hole and the valve plate mounting hole.

Preferably, both ends of the fixing rod are provided with threaded sections, the outer wall of the threaded section is provided with a locking nut, the lower end of the threaded section is provided with a sealing washer, and the sealing washer is in close contact with the outer wall of the connecting hole combine.

Preferably, one end of the fixing rod is provided with a top plate, one side of the top plate is provided with a pull ring, and the support plate at the lower end of the pull ring is rotatably connected to the top plate through a rotating shaft.

Preferably, a second pressure cap and a gasket are provided at the connection between the upper joint and the valve body, the gasket is located below the second pressure cap, and the gasket is connected to the internal mechanical seal of the valve body.

Preferably, the lower joint and the upper joint are respectively located at the lower end and the upper end of the valve body, and the size of the lower joint and the upper joint are equal.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The utility model inserts the valve plate mounting end at the upper end of the valve plate into the interior of the lower joint, so that the valve plate mounting hole inside the mounting end corresponds to the two connecting holes on the inner wall of the lower joint, and the fixing rod is inserted through the valve. plate mounting holes and connecting holes, so as to achieve the purpose of fixed installation of the valve plate, and finally install the valve stem on the upper joint in the same way. The design is more advanced and reasonable, it can provide back pressure with higher stability and less fluctuation in the system, and it can respond quickly to pressure changes with extremely high sensitivity.

2. Seal the connection hole by installing two sealing washers on the outer walls of both sides of the connection hole, and then install two locking nuts on the threaded section to lock the fixing rod. The pull ring is folded and placed, reducing the footprint of the fixed pole.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present utility model;

2 is a schematic diagram of the connection structure of the lower joint of the present invention;

Figure 3 is a schematic structural diagram of a fixed rod of the present invention;

4 is a schematic structural diagram of the connecting part of the pull ring and the fixing rod of the present invention;

In the figure: 1. valve body; 2. lower seat; 3. valve plug; 4. right-angle combined seal; 5. locking nut; 6. lower joint; 7. first pressure cap; 8. pressure pad; 9. Connector; 10. Extension gland; 11. Pipeline; 12. Pipeline nut sleeve; 13. Compression nut; 14. Upper joint; 15. Second pressure cap; 16. Gasket; 17. Piston; 18. Valve needle ; 19, connecting hole; 20, valve plate mounting hole; 21, fixing rod; 22, pull ring; 23, sealing washer; 24, thread segment; 25, top plate; 26, shaft.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

1-4, an embodiment provided by the present invention: an ultra-high pressure back pressure valve, comprising a valve body 1, the lower end of the valve body 1 is provided with a lower seat 2, and the inside of the lower seat 2 is provided with a valve plug 3, The lower part of the valve plug 3 is provided with a lower joint 6, the connection between the lower joint 6 and the valve plug 3 is provided with a right-angle combined seal 4, and a locking nut 5 is arranged on the outer wall of the lower joint 6, and the upper part of the locking nut 5 is provided with a The first pressure cap 7 and pressure pad 8, a connecting head 9 is arranged on one side outer wall of the lower seat 2, an upper joint 14 is arranged on the upper end of the valve body 1, a compression nut 13 is arranged on the outer wall of the upper joint 14, and the upper joint The lower end of 14 is provided with a piston 17, the inside of the piston 17 is provided with a valve needle 18, the outer wall of one side of the valve body 1 is provided with an extension gland 10, the inside of the extension gland 10 is provided with a pipeline 11, and one end of the pipeline 11 passes through the pipeline The nut sleeve 12 is fixedly connected to the interior of the extension gland 10 .

Further, connecting holes 19 are provided on the inner two outer walls of the lower joint 6, and a valve plate mounting hole 20 is arranged inside the lower joint 6, and the valve plate mounting hole 20 and the two connecting holes 19 are located on the same horizontal line. 19 and the valve plate mounting hole 20 are provided with a fixing rod 21. The connecting holes 19 provided on the outer walls of the inner two sides of the lower joint 6 play a role corresponding to the valve plate mounting hole 20. The connecting hole 19 and the valve plate mounting hole 20 The fixed rod 21 provided inside the valve plate plays the role of connecting the valve plate and the valve body 1 .

Further, both ends of the fixing rod 21 are provided with threaded sections 24, and the outer wall of the threaded section 24 is provided with a locking nut, the lower end of the threaded section 24 is provided with a sealing washer 23, and the sealing washer 23 and the outer wall of the connecting hole 19 The threaded sections 24 provided at both ends of the fixing rod 21 play a role in facilitating the installation of the locking nut on the fixing rod 21 , and the sealing gasket 23 installed on the lower end of the threaded section 24 plays the role of sealing the connecting hole 19 .

Further, one end of the fixed rod 21 is provided with a top plate 25, one side of the top plate 25 is provided with a pull ring 22, and the support plate at the lower end of the pull ring 22 is rotatably connected with the top plate 25 through the rotating shaft 26, and the top plate 25 provided at one end of the fixed rod 21 is connected to the top plate 25. For the function of connecting the pull ring 22 , the pull ring 22 provided on one side of the top plate 25 plays the role of facilitating the pulling of the fixing rod 21 .

Further, the connection between the upper joint 14 and the valve body 1 is provided with a second pressure cap 15 and a gasket 16, and the gasket 16 is located below the second pressure cap 15, and the gasket 16 is connected with the internal mechanical seal of the valve body 1, The second pressure cap 15 and the gasket 16 provided at the connection between the upper joint 14 and the valve body 1 play the role of pressing and filling the connection between the upper joint 14 and the valve body 1 .

Further, the lower joint 6 and the upper joint 14 are located at the lower end and the upper end of the valve body 1 respectively, and the lower joint 6 and the upper joint 14 have the same size, and the lower joint 6 and the upper joint 14 serve to connect the valve stem and the valve body 1 respectively. The role of the valve plate.

Working principle: When in use, insert the valve plate mounting end at the upper end of the valve plate into the interior of the lower joint 6, so that the valve plate mounting hole 20 inside the mounting end corresponds to the two connecting holes 19 on the inner wall of the lower joint 6, The rod 21 is inserted through the valve plate mounting hole 20 and the connecting hole 19, so as to achieve the purpose of fixed installation of the valve plate. After the fixing is completed, two sealing washers 23 are installed on the outer walls of both sides of the connecting hole 19 to seal the connecting hole. 19. Then install two locking nuts on the threaded section 24 to lock the fixing rod 21. After locking, the pull ring 22 on the top plate 25 is folded and placed through the rotating shaft 26, which reduces the occupation of the fixing rod 21. Finally, the valve stem is installed on the upper joint 14 in the same way. This installation structure is more advanced and reasonable, and can greatly improve the functional practicability of the valve body 1 .

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims (6)

1. Superhigh pressure back-pressure valve, including valve body (1), its characterized in that: the lower end of the valve body (1) is provided with a lower seat (2), the lower seat (2) is internally provided with a valve plug (3), the lower part of the valve plug (3) is provided with a lower joint (6) and a right-angle combined sealing element (4) at the joint of the valve plug (3), the outer wall of the lower joint (6) is provided with a locking nut (5), the upper part of the locking nut (5) is provided with a first pressing cap (7) and a pressing pad (8), the outer wall of one side of the lower seat (2) is provided with a connector (9), the upper end of the valve body (1) is provided with an upper joint (14), the outer wall of the upper joint (14) is provided with a compression nut (13), the lower end of the upper joint (14) is provided with a piston (17), the inside of the piston (17) is provided with a valve needle (18), one side of the valve body (1) is provided with a lengthened, the pipeline (11) is arranged in the lengthened gland (10), and one end of the pipeline (11) is fixedly connected with the inside of the lengthened gland (10) through a pipeline nut sleeve (12).

2. An ultra-high pressure back-pressure valve according to claim 1, wherein: be provided with connecting hole (19) on the inside both sides outer wall of lower clutch (6), the inside of lower clutch (6) is provided with valve plate mounting hole (20), and valve plate mounting hole (20) all are located same water flat line with two connecting holes (19), the inside of connecting hole (19) and valve plate mounting hole (20) is provided with dead lever (21).

3. An ultra-high pressure back-pressure valve according to claim 2, wherein: both ends of dead lever (21) all are provided with screw thread section (24), and install lock nut on the outer wall of screw thread section (24), seal ring (23) are installed to the lower extreme of screw thread section (24), and seal ring (23) closely laminate with the outer wall of connecting hole (19).

4. An ultra-high pressure back-pressure valve according to claim 2, wherein: one end of the fixed rod (21) is provided with a top plate (25), one side of the top plate (25) is provided with a pull ring (22), and a supporting plate at the lower end of the pull ring (22) is rotatably connected with the top plate (25) through a rotating shaft (26).

5. An ultra-high pressure back-pressure valve according to claim 1, wherein: the joint of the upper joint (14) and the valve body (1) is provided with a second pressure cap (15) and a gasket (16), the gasket (16) is located below the second pressure cap (15), and the gasket (16) is in mechanical sealing connection with the interior of the valve body (1).

6. An ultra-high pressure back-pressure valve according to claim 1, wherein: the lower joint (6) and the upper joint (14) are respectively positioned at the lower end and the upper end of the valve body (1), and the sizes of the lower joint (6) and the upper joint (14) are equal.

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