CN219198301U

CN219198301U - Axial valve

Info

Publication number: CN219198301U
Application number: CN202223340091.2U
Authority: CN
Inventors: 林光办; 吕智健; 叶迅良; 胡道忠; 周财慈; 卢再望; 丁新; 吴寿敬; 叶超超
Original assignee: Zhejiang Bertley Technology Co ltd
Current assignee: Zhejiang Bertley Technology Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-06-16
Anticipated expiration: 2032-12-14

Abstract

The utility model relates to an axial valve comprising: a valve body, a valve rod and a valve core; the method is characterized in that: the valve cavity between the inlet cavity and the outlet cavity of the valve body adopts an annular axial flow channel structure, a sleeve with a window is arranged between the annular axial flow channel and the outlet cavity of the valve body, and a mounting island is arranged in the middle of the annular axial flow channel; the valve core adopts a cylinder structure, the outer round surface of the valve core and the sleeve form a piston structure, the center of the valve core is arranged in an axial shaft hole of the installation island in a dynamic sealing way through the transmission shaft, the valve rod is arranged in a radial shaft hole of the installation island, and 45-degree bevel gears are meshed with the transmission shaft. The valve rod is connected with the valve core through mutually perpendicular transmission shafts, and the shaft hole of the valve rod is isolated from the medium flow passage, so that zero external leakage of the medium is realized, and the valve has the advantages of good sealing performance, long service life and the like.

Description

Axial valve

Technical Field

The utility model belongs to the field of valves, and particularly relates to an axial valve with high sealing performance. The utility model is suitable for the working conditions of toxic, harmful and dangerous media.

Background

The valve type is many, for example ball valve, stop valve, gate valve, butterfly valve, plug valve etc. structural type, usually all have valve body, disk seat, case, valve gap, valve rod, drive mechanism to constitute, drive the valve rod by drive mechanism drive case, realize opening or closing of case and disk seat. However, a dynamic sealing structure is generally arranged between the middle cavity of the valve body and the valve rod, when the valve rod rotates or moves, the sealing material of the middle cavity is easy to wear, the sealing performance of the valve rod gradually decreases along with the service time, and the medium leaks. For the working condition with high sealing requirement, in order to prevent safety accidents caused by medium leakage, the valve needs to be replaced frequently, so that the production efficiency is affected, and the equipment operation and maintenance cost is improved.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides the axial valve with zero external leakage, good sealing performance and long service life.

The technical scheme for realizing the utility model is as follows:

an axial valve, comprising: a valve body, a valve rod and a valve core; the method is characterized in that: the valve cavity between the inlet cavity and the outlet cavity of the valve body adopts an annular axial flow channel structure, a sleeve with a window is arranged between the annular axial flow channel and the outlet cavity of the valve body, and a mounting island is arranged in the middle of the annular axial flow channel; the valve core adopts a cylinder structure, the outer round surface of the valve core and the sleeve form a piston structure, the center of the valve core is arranged in an axial shaft hole of the installation island in a dynamic sealing way through the transmission shaft, the valve rod is arranged in a radial shaft hole of the installation island, and 45-degree bevel gears are meshed with the transmission shaft.

Preferably, a packing sealing device is arranged between the support at the upper end of the radial shaft hole and the valve rod, a closed grease injection cavity is formed between the packing sealing device and the radial shaft hole and between the packing sealing device and the axial shaft hole, and a grease injection valve communicated with the grease injection cavity is arranged on the support.

Preferably, the grease injection valve is of a one-way flow check valve construction.

Preferably, a U-shaped rubber valve seat is arranged at the outlet end of the sleeve, and the U-shaped rubber valve seat and a cylinder at the outlet end of the valve core are mutually matched to form a sealing pair; an O-shaped sealing ring is arranged in the valve body outlet cavity at the left side of the sleeve window, and the O-shaped sealing ring is in sealing fit with the outer circular surface of the valve core cylinder.

Preferably, the annular axial flow passage has a flow area equal to the flow area of the inlet and outlet passages of the valve body.

Preferably, a transmission nut is arranged between the valve rod and the transmission shaft, the transmission nut is rotatably arranged in the axial shaft hole, 45-degree helical teeth are adopted to be meshed between the outer circular surface and the valve rod, the inner hole threads are matched with the outer threads of the transmission shaft, and an anti-rotation device is arranged between the transmission shaft and the axial shaft hole.

Compared with the prior art, the utility model has the beneficial effects that: the valve rod is connected with the valve core through mutually perpendicular transmission shafts, and the shaft hole of the valve rod is isolated from the medium flow passage, so that zero external leakage of the medium is realized, and the valve has the advantages of good sealing performance, long service life and the like. The problems that the production efficiency is affected and the operation and maintenance cost is increased due to the fact that the valve is frequently replaced under the toxic, harmful and dangerous medium working conditions are effectively solved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure: 1 valve body, 2 valve core, 3 transmission shaft, 4 outlet chamber, 5 pressure pipe, 6 clamping ring, 7U type rubber valve seat, 8 sleeve, 9O type sealing washer, 10 annular axial flow runner, 11 installation island, 12 valve rod, 13 radial shaft hole, 14 support, 15 packing sealing device, 16 grease injection valve, 17 axial shaft hole, 18 inlet chamber.

Detailed Description

An axial valve as shown in fig. 1, comprising: a valve body 1, a valve rod 12 and a valve core 2; the method is characterized in that: an annular axial flow channel 10 is arranged in a valve cavity between an inlet cavity 18 and an outlet cavity 4 of the valve body 1, a sleeve 8 with a window is arranged between an outlet of the annular axial flow channel 10 and the outlet cavity 4 of the valve body 1, a medium in the inlet cavity 18 flows into the outlet cavity 4 from the window in the circumferential direction of the sleeve 8 through the annular axial flow channel 10, a mounting island 11 is arranged in the middle of the annular axial flow channel 10, the mounting island 11 is connected with an inner cavity wall of the valve body 1 through radial ribs, and the annular axial flow channel 10 is formed between the outer surface of the mounting island 11 and the inner cavity wall of the valve body 1; the valve core 2 adopts a cylindrical structure, the outer round surface of the valve core and the sleeve 8 form a piston structure, the center of the valve core is dynamically sealed and installed in an axial shaft hole 17 of the installation island 11 through the transmission shaft 3, the lower end of the valve rod 12 is installed in a radial shaft hole 13 of the installation island 11, the upper end of the valve rod 12 penetrates through the bracket 14 to be connected with the transmission mechanism, and 45-degree helical teeth are adopted to be meshed with the transmission shaft 3. When the transmission mechanism transmits the valve rod 12 to move downwards, the transmission shaft 3 and the valve core 2 are pushed to move towards the outlet direction of the valve body 1, and the valve is closed; conversely, when the valve rod 12 moves upwards, the transmission shaft 3 and the valve core 2 are pushed to move towards the inlet direction of the valve body 1, and the valve is opened. The shaft hole of the valve rod 12 is isolated from the medium flow passage, so that leakage of the medium in the flow passage from the sealing position of the valve rod 12 is avoided, and zero leakage of the medium is realized.

A packing sealing device 15 is arranged between a bracket 14 at the upper end of the radial shaft hole 13 and the valve rod 12, a closed grease injection cavity is formed between the packing sealing device 15 and the radial shaft hole 13 and between the packing sealing device and an axial shaft hole 17, and a grease injection valve 16 communicated with the grease injection cavity is arranged on the bracket 14. Grease is injected into the grease injection cavity through the grease injection valve 16, and the grease injection cavity has sealing and lubricating effects.

The grease injection valve 16 adopts a one-way flow check valve structure, so that grease in the grease injection cavity can be prevented from flowing outwards.

A U-shaped rubber valve seat 7 is arranged at the outlet end of the sleeve 8, and the U-shaped rubber valve seat 7 and the outer circular surface of the right end of the cylinder of the valve core 2 are matched with each other to form a sealing pair; an O-shaped sealing ring 9 is arranged in the outlet cavity of the valve body 1 at the left side of the window of the sleeve 8, and the O-shaped sealing ring 9 is in sealing fit with the cylindrical outer circular surface of the valve core 2. The U-shaped rubber valve seat 7 is fixedly arranged on the sleeve 8 by the pressing pipe 5, a sealing ring is arranged between the outer circular surface of the pressing pipe 5 and the inner wall of the outlet cavity 4, the pressing ring 6 is in threaded connection with the inner wall of the outlet cavity 4, and the pressing pipe 5 and the sleeve 8 are in compression installation.

The annular axial flow type flow channel 10 has the flow area equal to the flow area of the inlet and outlet channels of the valve body 1, and has good fluid flow performance, small pressure loss and flow resistance and low flow noise.

A transmission nut is arranged between the valve rod 12 and the transmission shaft 3, the transmission nut is rotatably arranged in the axial shaft hole 17, 45-degree helical teeth are adopted to be meshed with the valve rod 12, inner hole threads are matched with outer threads of the transmission shaft 3, and an anti-rotation device is arranged between the transmission shaft 3 and the axial shaft hole to convert the rotation motion of the transmission nut into the linear motion of the transmission shaft 3.

The terms "upper", "lower", "left" and "right" in the present utility model refer to the orientations in the drawings, and are not intended to limit the present utility model.

Claims

1. An axial valve, comprising: a valve body (1), a valve rod (12) and a valve core (2); the method is characterized in that: an annular axial flow channel (10) is arranged in a valve cavity between an inlet cavity (18) and an outlet cavity (4) of the valve body (1), a sleeve (8) with a window is arranged between an outlet of the annular axial flow channel (10) and the outlet cavity (4) of the valve body (1), and a mounting island (11) is arranged in the middle of the annular axial flow channel (10); the valve core (2) adopts a cylindrical structure, the outer circular surface of the valve core and the inner wall of the sleeve (8) form a piston structure, the center of the valve core is dynamically sealed and installed in an axial shaft hole (17) of the installation island (11) through the transmission shaft (3), the lower end of the valve rod (12) is installed in a radial shaft hole (13) of the installation island (11), the upper end of the valve rod passes through the bracket (14) to be connected with the transmission mechanism, and 45-degree helical teeth are meshed with the transmission shaft (3) between the valve rod (12).

2. An axial valve according to claim 1, characterized in that: a packing sealing device (15) is arranged between a support (14) at the upper end of the radial shaft hole (13) and the valve rod (12), a closed grease injection cavity is formed between the packing sealing device (15) and the radial shaft hole (13) and between the packing sealing device and the axial shaft hole (17), and a grease injection valve (16) communicated with the grease injection cavity is arranged on the support (14).

3. An axial valve according to claim 2, characterized in that: the grease injection valve (16) adopts a one-way flow check valve structure.

4. An axial valve according to claim 1 or 2 or 3, characterized in that: a U-shaped rubber valve seat (7) is arranged at the outlet end of the sleeve (8), and the U-shaped rubber valve seat (7) is matched with the outer circular surface of the right end of the cylinder of the valve core (2) to form a sealing pair; an O-shaped sealing ring (9) is arranged in the outlet cavity of the valve body 1 at the left side of the window of the sleeve (8), and the O-shaped sealing ring (9) is in sealing fit with the cylindrical outer circular surface of the valve core (2).

5. An axial valve according to claim 1 or 2 or 3, characterized in that: the flow area of the annular axial flow channel (10) is equal to the flow area of the inlet and outlet channels of the valve body (1).

6. An axial valve according to claim 1 or 2 or 3, characterized in that: a transmission nut is arranged between the valve rod (12) and the transmission shaft (3), the transmission nut is rotatably arranged in the axial shaft hole (17), 45-degree helical teeth are adopted between the outer circular surface and the valve rod (12) for mutual engagement, the inner hole threads are mutually matched with the outer threads of the transmission shaft (3), and an anti-rotation device is arranged between the transmission shaft (3) and the axial shaft hole.

7. The axial valve of claim 4 wherein: a transmission nut is arranged between the valve rod (12) and the transmission shaft (3), the transmission nut is rotatably arranged in the axial shaft hole (17), 45-degree helical teeth are adopted between the outer circular surface and the valve rod (12) for mutual engagement, the inner hole threads are mutually matched with the outer threads of the transmission shaft (3), and an anti-rotation device is arranged between the transmission shaft (3) and the axial shaft hole.