Pilot valve assembly

Abstract

The utility model discloses a pilot valve assembly which comprises a valve body, a mounting channel, a liquid inlet channel and a liquid outlet channel are arranged in the valve body, a plug, a valve element assembly, an elastic assembly and an adjusting assembly are sequentially arranged in the mounting channel from left to right, and the valve element assembly comprises a guide sleeve, a guide rod, a valve seat, a ball core and a guide seat. The guide rod is slidably mounted in the guide sleeve, a fluid channel communicated with the liquid inlet channel is arranged between the guide rod and the guide sleeve, the valve seat and the guide seat are located on the right side of the guide rod, a movable hole allowing the ball core to move and a plurality of fluid holes surrounding the movable hole are formed in the center of the guide seat, and the fluid holes are communicated with the liquid outlet channel. The ball core is matched with the valve seat, the requirement for precision is low, the guide rod and fluid media act on the ball core at the same time, and the response speed of a hydraulic system is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a pilot valve component. Background Art

[0002] As one of the main components of the pilot valve, the performance of the mechanical pilot valve directly affects important performance indicators such as the pressure of the pump station system.

[0003] Chinese patent No. CN202320997362.7 discloses an anti-blocking pilot valve, including a valve body and a valve core. A liquid inlet cavity and a liquid outlet cavity are provided in the valve body. The liquid inlet cavity and the liquid outlet cavity are respectively provided with a liquid inlet and a liquid outlet. A valve hole is provided between the liquid inlet cavity and the liquid outlet cavity. The valve body is provided with a threaded boss. The valve body is provided with a valve cover at the side end of the liquid inlet cavity. The liquid inlet cavity is provided with a hanging tube threadedly matched with the valve hole. The valve core includes a shaft tube and a plug. A spring is provided between the plug and an adjusting rod provided on the valve body. The plug is pressed against and blocks the valve hole. The spring sleeve is provided outside the shaft tube. The adjusting rod is provided with a sliding shaft inserted into the shaft tube and forming a sliding fit. The valve core is provided with a ejector pin. A liquid flow gap is left between the ejector pin and the inner wall of the hanging tube. The end of the ejector pin is slidingly fitted on the inner side of the sliding hole provided on the valve cover.

[0004] Problems existing in the above patent: the end of the existing valve core is usually conical, and the conical end of the valve core cooperates with the inner hole of the valve seat. When the fluid medium enters, it acts on the conical surface of the valve core, pushing it open to realize the circulation of the fluid medium. However, when processing the valve core, it is necessary to ensure both the size of the conical surface and the coaxial setting of the valve core and the valve seat. The matching accuracy requirements are high. Based on this problem, the valve core opening and closing structure is improved. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a pilot valve assembly.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pilot valve assembly, including a valve body, wherein the valve body is provided with an installation channel, a liquid inlet channel and a liquid outlet channel, the installation channel is provided with a plug, a valve core assembly, an elastic assembly and an adjustment assembly from left to right, the valve core assembly includes a guide sleeve, a guide rod, a valve seat, a ball core and a guide seat, the guide rod is slidably installed in the guide sleeve, a fluid channel connected to the liquid inlet channel is provided between the guide rod and the guide sleeve, the valve seat and the guide seat are located on the right side of the guide rod, the center of the guide seat is provided with an active hole for the ball core to move and a plurality of fluid holes arranged around the active hole, the fluid hole is connected with the liquid outlet channel, and the ball core is pressed against the valve hole of the valve seat under the action of the elastic assembly.

[0007] As a preferred technical solution of the utility model, a guide plate is provided at one end of the guide sleeve facing the plug, a guide hole is provided at the center of the guide plate, the guide rod is inserted into the guide hole, and a channel hole for fluid to pass through is provided on the guide plate, and the channel hole is connected to the fluid channel.

[0008] As a preferred technical solution of the utility model, the guide rod includes a guide column and a push column, the guide column is adapted to the diameter of the guide hole, and the diameter of the push column is smaller than the diameter of the valve seat valve hole.

[0009] As a preferred technical solution of the utility model, the elastic component includes a push seat, a fixed seat and a compression spring located therebetween.

[0010] As a preferred technical solution of the utility model, the pushing seat includes a pushing head and a pushing sleeve, the fixed seat includes a plug-in rod and a fixed head, the plug-in rod and the pushing sleeve are plug-fitted together, and the compression spring sleeve is arranged outside the pushing sleeve and is located between the pushing head and the fixed head.

[0011] As a preferred technical solution of the utility model, the outer wall of the fixed head is provided with an annular groove and an O-shaped sealing ring sleeved in the annular groove.

[0012] As a preferred technical solution of the utility model, the adjustment component includes an adjusting screw sleeve and a screw rod, the adjusting screw sleeve is provided with an internal threaded hole and an external thread, the adjusting screw sleeve is threadedly connected to the right end of the installation channel, and the screw rod is threadedly connected to the internal threaded hole of the adjusting screw sleeve.

[0013] As a preferred technical solution of the utility model, it also includes a gasket and a nut arranged on the outer end of the screw.

[0014] To sum up, the beneficial effects of the utility model are as follows: the ball core cooperates with the valve seat, and the valve hole of the valve seat is closed by utilizing the spherical surface of the ball core, and the requirement for cooperation accuracy is low. The ball core is a ceramic ball core. When the system pressure reaches the set pressure of the mechanical pilot valve, a part of the fluid medium acts on the guide rod and pushes it to move toward the ball core, and a part of the fluid medium directly acts on the ball core through the fluid channel. Driven by the push rod and the fluid medium, the ball core moves to the right to open the valve hole of the valve seat, and the fluid medium flows to the liquid outlet channel through the fluid hole, thereby improving the response speed of the hydraulic system. When the hydraulic system pressure drops to the value when the pilot valve restores the supply pressure, the ball core is reset under the action of the elastic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded view of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is a partial cross-sectional view of the installation channel portion of the valve body of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the valve core assembly in the utility model;

[0019] Figure 5 yes Figure 3 Enlarged view of part A;

[0020] Figure 6 It is a structural schematic diagram of the elastic force component in the utility model;

[0021] Figure 7 It is a structural schematic diagram of the regulating component in the utility model.

[0022] 1. Valve body; 2. Installation channel; 3. Liquid inlet channel; 4. Liquid outlet channel; 5. Plug; 6. Valve core assembly; 7. Elastic assembly; 8. Adjustment assembly; 9. Guide sleeve; 10. Guide rod; 11. Valve seat; 12. Ball core; 13. Guide seat; 14. Fluid channel; 15. Movable hole; 16. Fluid hole; 17. Valve hole; 18. Guide plate; 19. Guide hole; 20. Channel hole; 21. Guide column; 22. Push column; 23. Push seat; 24. Fixed seat; 25. Compression spring; 26. Push head; 27. Push sleeve; 28. Connecting rod; 29. ​​Fixed head; 30. Annular groove; 31. O-ring; 32. Adjusting screw sleeve; 33. Screw; 34. Gasket; 35. Nut. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0024] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 7A pilot valve assembly is shown, comprising a valve body 1, wherein the valve body 1 is provided with an installation channel 2, a liquid inlet channel 3 and a liquid outlet channel 4, wherein the installation channel 2 is provided with a plug 5, a valve core assembly 6, an elastic assembly 7 and an adjustment assembly 8 in sequence from left to right, wherein the valve core assembly 6 comprises a guide sleeve 9, a guide rod 10, a valve seat 11, a ball core 12 and a guide seat 13, wherein the guide rod 10 is slidably installed in the guide sleeve 9, wherein a fluid channel 14 connected to the liquid inlet channel 3 is provided between the guide rod 10 and the guide sleeve 9, wherein the valve seat 11 and the guide seat 13 are located on the right side of the guide rod 10, wherein the center of the guide seat 13 is provided with an active hole 15 for the ball core 12 to move and a plurality of fluid holes 16 arranged around the active hole 15, wherein the fluid hole 16 is connected to the liquid outlet channel 4, and wherein the ball core 12 abuts against the valve hole 17 of the valve seat 11 under the action of the elastic assembly 7.

[0026] Working principle: The ball core 12 cooperates with the valve seat 11, and the valve hole 17 of the valve seat 11 is closed by the spherical surface of the ball core 12. The requirement for cooperation accuracy is low. The ball core 12 is a ceramic ball core 12. When the system pressure reaches the set pressure of the mechanical pilot valve, a part of the fluid medium acts on the guide rod 10 and pushes it to move toward the ball core 12, and a part of the fluid medium directly acts on the ball core 12 through the fluid channel 14. Driven by the push rod and the fluid medium, the ball core 12 moves to the right to open the valve hole 17 of the valve seat 11, and the fluid medium flows to the liquid outlet channel 4 through the fluid hole 16, thereby improving the response speed of the hydraulic system. When the hydraulic system pressure drops to the pilot valve to restore the supply pressure value, the ball core 12 is reset under the action of the elastic component 7.

[0027] A guide plate 18 is provided at one end of the guide sleeve 9 facing the plug 5, a guide hole 19 is provided at the center of the guide plate 18, the guide rod 10 is slidably installed in the guide hole 19, a channel hole 20 for fluid to pass through is provided on the guide plate 18, and the channel hole 20 is connected to the fluid channel 14, and the channel hole 20 can be arc-shaped, circular or irregular.

[0028] The guide rod 10 includes a guide column 21 and a push column 22 . The guide column 21 is adapted to the diameter of the guide hole 19 . The diameter of the push column 22 is smaller than the diameter of the valve hole 17 of the valve seat 11 . The fluid medium can reach the valve hole 17 of the valve seat 11 through the fluid channel 14 .

[0029] The elastic component 7 includes a pushing seat 23, a fixed seat 24 and a compression spring 25 located therebetween. The pushing seat 23 includes a pushing head 26 and a pushing sleeve 27. The fixed seat 24 includes a plug-in rod 28 and a fixed head 29. The plug-in rod 28 and the pushing sleeve 27 are plug-fitted together. The compression spring 25 is sleeved outside the pushing sleeve 27 and is located between the pushing head 26 and the fixed head 29.

[0030] An annular groove 30 and an O-ring 31 sleeved in the annular groove 30 are disposed on the outer wall of the fixed head 29 to prevent the fixed seat 24 from moving easily.

[0031] The adjusting assembly 8 includes an adjusting screw sleeve 32 and a screw rod 33. The adjusting screw sleeve 32 is provided with an internal threaded hole and an external thread. The adjusting screw sleeve 32 is threadedly connected to the right end of the mounting channel 2. The screw rod 33 is threadedly connected to the internal threaded hole of the adjusting screw sleeve 32. It also includes a gasket 34 and a nut 35 arranged at the outer end of the screw rod 33.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the utility model, and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A pilot valve assembly, comprising a valve body (1), wherein the valve body (1) is provided with an installation channel (2), a liquid inlet channel (3) and a liquid outlet channel (4), wherein the installation channel (2) is provided with a plug (5), a valve core assembly (6), an elastic assembly (7) and an adjustment assembly (8) in sequence from left to right, characterized in that: The valve core assembly (6) comprises a guide sleeve (9), a guide rod (10), a valve seat (11), a ball core (12) and a guide seat (13); the guide rod (10) is slidably mounted in the guide sleeve (9); a fluid channel (14) connected to a liquid inlet channel (3) is provided between the guide rod (10) and the guide sleeve (9); the valve seat (11) and the guide seat (13) are located on the right side of the guide rod (10); a movable hole (15) for the ball core (12) to move and a plurality of fluid holes (16) arranged around the movable hole (15) are provided at the center of the guide seat (13); the fluid hole (16) is connected to a liquid outlet channel (4); and the ball core (12) is pressed against the valve hole (17) of the valve seat (11) under the action of an elastic component (7).

2. The pilot valve assembly according to claim 1, characterized in that: The guide sleeve (9) is provided with a guide plate (18) at one end facing the plug (5), a guide hole (19) is provided at the center of the guide plate (18), the guide rod (10) is inserted into the guide hole (19), and a channel hole (20) for fluid to pass through is provided on the guide plate (18), and the channel hole (20) is connected to the fluid channel (14).

3. The pilot valve assembly according to claim 2, characterized in that: The guide rod (10) comprises a guide column (21) and a push column (22); the guide column (21) is adapted to the diameter of the guide hole (19); and the diameter of the push column (22) is smaller than the diameter of the valve hole (17) of the valve seat (11).

4. The pilot valve assembly according to claim 1, characterized in that: The elastic component (7) comprises a pushing seat (23), a fixing seat (24) and a compression spring (25) located therebetween.

5. The pilot valve assembly according to claim 4, characterized in that: The push seat (23) comprises a push head (26) and a push sleeve (27); the fixed seat (24) comprises a plug-in rod (28) and a fixed head (29); the plug-in rod (28) and the push sleeve (27) are plug-fitted; the compression spring (25) is sleeved outside the push sleeve (27) and is located between the push head (26) and the fixed head (29).

6. The pilot valve assembly according to claim 5, characterized in that: The outer wall of the fixed head (29) is provided with an annular groove (30) and an O-shaped sealing ring (31) sleeved in the annular groove (30).

7. The pilot valve assembly according to claim 6, characterized in that: The adjusting assembly (8) comprises an adjusting screw sleeve (32) and a screw rod (33), wherein the adjusting screw sleeve (32) is provided with an internal thread hole and an external thread, the adjusting screw sleeve (32) is threadedly connected to the right end of the mounting channel (2), and the screw rod (33) is threadedly connected to the internal thread hole of the adjusting screw sleeve (32).

8. The pilot valve assembly according to claim 7, characterized in that: It also includes a washer (34) and a nut (35) which are arranged on the outer end of the screw rod (33).

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