Axial flow type regulating valve

Abstract

The utility model discloses an axial flow type regulating valve, which relates to the technical field of valves and comprises a valve body, a valve inner body is arranged in the valve body, one end of the valve inner body is of a conical structure, a flow guide cover is arranged at a port of the conical structure, a sleeve is arranged at one end, far away from the flow guide cover, of the valve inner body, and a valve seat is arranged on the outer side of the sleeve. A cap is arranged on the outer side of the valve seat, a valve element is arranged in the sleeve in a matched mode, a guide shaft sleeve is fixed in the valve inner body, a push rod is transversely installed in the guide shaft sleeve, one end of the push rod is connected with the valve element, a valve rod is arranged in the valve inner body, the upper end of the valve rod penetrates out of the valve body, and the lower end of the valve rod penetrates through the guide shaft sleeve to extend downwards. The push rod is meshed with the valve rod through helical teeth, a grease injection valve is arranged on the portion, extending out of the valve body, of the valve rod, the valve rod is provided with a grease injection channel, and the grease injection valve is communicated with the helical teeth of the valve rod through the grease injection channel. The thrust of the actuating mechanism required by the action of the valve is small, jamming can be effectively prevented, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to an axial flow regulating valve. Background Art

[0002] The axial flow regulating valve is a kind of regulating valve. It forms an annular flow passage coaxial with the pipeline axis by designing a valve inner body coaxial with the pipeline in the middle cavity of the valve body. A valve core coaxial with the pipeline axis is slidably installed in the sleeve, so that the medium can evenly disperse and bypass the conical body to form a concentric circular flow beam in the annular flow passage and enter the downstream pipeline. The existing axial flow regulating valves usually install a gear-rack transmission mechanism or a steering sleeve transmission mechanism in the valve body to convert the torque output by the rotary actuator into the reciprocating linear motion of the valve core along the pipeline axis direction to regulate the opening degree of the valve port, thereby achieving the purpose of regulating the flow rate. Under the working conditions of high temperature and high pressure difference, this kind of axial flow regulating valve has a large flow resistance coefficient, and the force required for the corresponding actuator to rotate the valve stem is relatively large, and it is easy to get stuck, which affects the service life of the valve. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the utility model provides an axial flow regulating valve.

[0004] The technical solution provided by the utility model is as follows:

[0005] An axial flow regulating valve, comprising a valve body. A valve inner body is arranged in the valve body. One end of the valve inner body is in a conical structure. A flow guide cover is arranged at the port of the conical structure. A sleeve is arranged at the end of the valve inner body away from the flow guide cover. A valve seat is arranged outside the sleeve. A union nut is arranged outside the valve seat. A valve core is arranged in the sleeve in a matching manner. A guide shaft sleeve is fixed in the valve inner body. A push rod is horizontally installed in the guide shaft sleeve. One end of the push rod is connected with the valve core. A valve stem is arranged in the valve body. The upper end of the valve stem penetrates out of the valve body, and the lower end extends downward through the guide shaft sleeve. Oblique teeth are arranged on both the push rod and the valve stem. The push rod and the valve stem are meshed through the oblique teeth. A grease injection valve is arranged on the part of the valve stem extending out of the valve body. The valve stem is provided with a grease injection channel. The grease injection valve is communicated with the oblique teeth of the valve stem through the grease injection channel.

[0006] The grease injection channel is provided with a plurality of grease injection outlets, and the grease injection outlets are evenly distributed along the oblique tooth part of the valve stem.

[0007] The sleeve is provided with a plurality of flow limiting holes, and the flow limiting holes are evenly distributed along the circumferential direction of the sleeve.

[0008] The flow limiting holes include a rectangular section and a triangular section, and the rectangular section is connected with the triangular section and the apex angle of the triangular section faces outward.

[0009] An arc-shaped chamfer is arranged at the end of the oblique teeth.

[0010] An O-shaped sealing ring is arranged between the valve seat and the union nut.

[0011] A sealing ring is provided between the valve core and the valve inner body.

[0012] Advantages of the utility model: The utility model adopts the transmission mode of helical gear engagement between the valve stem and the push rod. The valve stem only needs to move up and down to drive the push rod to move horizontally, thereby driving the valve core to move. The thrust required for the actuator of the action is small. And by arranging a grease injection valve and a grease injection channel on the valve stem, the grease injection valve communicates with the helical teeth of the valve stem through the grease injection channel, which is convenient for injecting lubricating grease at the meshing part to prevent jamming, and can effectively extend the service life of the valve under the working conditions of high temperature and high pressure difference. Description of the Drawings

[0013] Figure 1 It is a schematic structural view of an embodiment of the utility model;

[0014] Figure 2 It is a schematic cross-sectional structural view of the valve stem of an embodiment of the utility model;

[0015] Figure 3 It is a schematic structural view of the valve stem of an embodiment of the utility model;

[0016] Figure 4 It is a schematic structural view of the sleeve of an embodiment of the utility model. Detailed Embodiment

[0017] The following further describes the embodiments of the utility model with reference to the drawings.

[0018] Such as Figure 1As shown in the figure, an axial flow regulating valve includes a valve body 1. Inside the valve body 1, there is an inner valve body 2. One end of the inner valve body 2 is in a conical structure, and a flow guide cover 7 is provided at the port of the conical structure. At the end of the inner valve body 2 away from the flow guide cover 7, there is a sleeve 8. Outside the sleeve 8, there is a valve seat 12. Outside the valve seat 12, there is a union nut 14. An O-ring 13 is provided between the valve seat 12 and the union nut 14. The valve seat 12 is pressed against the sleeve 8 by the union nut 14. The O-ring 13 prevents the medium from leaking through the gap between the valve seat 12 and the union nut 14. A valve core 10 is fitted inside the sleeve 8. A sealing ring 15 is provided between the valve core 10 and the inner valve body 2. A guide bushing 4 is fixed inside the inner valve body 2. The guide bushing 4 includes a transverse groove and a longitudinal groove. A push rod 9 is installed in the transverse groove of the guide bushing 4. One end of the push rod 9 is connected to the valve core 10. There is a valve rod 5 inside the valve body 1. The upper end of the valve rod 5 passes through the valve body 1, and the lower end extends downward through the longitudinal groove of the guide bushing 4. Helical teeth 11 are provided on both the push rod 9 and the valve rod 5. The push rod 9 and the valve rod 5 are engaged through the helical teeth 11. The upper end of the valve rod 5 can be connected to an actuator. The actuator drives the valve rod to move up and down. Through the transmission of the helical teeth 11, it will drive the push rod 9 to move horizontally along the guide bushing 4, and then drive the valve core 10 to reciprocate linearly along the pipeline axis direction to adjust the opening of the valve port, thereby realizing the regulation of the flow rate. The thrust required for the actuator for the action is relatively small.

[0019] As Figure 1-2 shown, a grease injection valve 6 is provided on the part of the valve rod 5 extending outside the valve body 1. The valve rod 5 is provided with a grease injection channel 21. The grease injection channel 21 is provided with a number of grease injection outlets 22. The grease injection outlets 22 are evenly distributed along the helical tooth part of the valve rod. The grease injection valve 6 communicates with the helical teeth of the valve rod 5 through the grease injection channel 21. The grease injection valve 6 is provided on the valve rod 5 to facilitate the injection of lubricating grease at the meshing part of the helical teeth, prevent jamming, and extend the service life of the valve.

[0020] As Figure 3 shown, an arc-shaped chamfer 31 is provided at the end of the helical tooth 11, so that the gap size at the ends of two adjacent helical teeth is larger than the spacing size in the middle, which is beneficial to transmission and thus reduces jamming.

[0021] As Figure 4 shown, the sleeve 8 is provided with a number of flow limiting holes 41. The flow limiting holes 41 are evenly distributed along the circumferential direction of the sleeve. The flow limiting holes 41 include a rectangular section 42 and a triangular section 43. The rectangular section 42 is connected to the triangular section 43 and the apex angle 44 of the triangular section faces outward. The valve core 10 moves horizontally in the sleeve 8, changing the area of the flow limiting holes 41 through which the medium can pass, to achieve flow regulation. The flow limiting holes 41 with this structure make the regulation curve of the valve relatively smooth and effectively improve the regulation accuracy of the valve.

[0022] The embodiments should not be construed as limiting the present invention. Any non-creative improvements based on the spirit of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. An axial flow regulating valve, comprising a valve body, a valve inner body is arranged in the valve body, one end of the valve inner body is a conical structure, a guide cover is arranged at the end of the conical structure, a sleeve is arranged at the end of the valve inner body away from the guide cover, a valve seat is arranged outside the sleeve, a cap is arranged outside the valve seat, a valve core is arranged in the sleeve, and the valve core is arranged in the sleeve, characterized in that: A guide sleeve is fixed inside the valve body, a push rod is transversely installed in the guide sleeve, one end of the push rod is connected to the valve core, a valve stem is arranged in the valve body, the upper end of the valve stem passes through the valve body, and the lower end passes through the guide sleeve and extends downward, the push rod and the valve stem are both provided with bevel teeth, the push rod and the valve stem are meshed with the bevel teeth, a grease injection valve is provided on the part of the valve stem extending out of the valve body, the valve stem is provided with a grease injection channel, and the grease injection valve is connected to the bevel teeth of the valve stem through the grease injection channel.

2. An axial flow regulating valve according to claim 1, characterized in that: The grease injection channel is provided with a plurality of grease injection outlets, and the grease injection outlets are evenly distributed along the oblique tooth portion of the valve stem.

3. An axial flow regulating valve according to claim 1, characterized in that: The sleeve is provided with a plurality of flow limiting holes, and the flow limiting holes are evenly distributed along the circumference of the sleeve.

4. An axial flow regulating valve according to claim 3, characterized in that: The flow limiting hole comprises a rectangular section and a triangular section, wherein the rectangular section is connected with the triangular section and the vertex of the triangular section faces outwards.

5. The axial flow regulating valve according to claim 1, characterized in that: The ends of the helical teeth are provided with arc-shaped chamfers.

6. The axial flow regulating valve according to claim 1, characterized in that: An O-shaped sealing ring is arranged between the valve seat and the valve cap.

7. The axial flow regulating valve according to claim 1, characterized in that: A sealing ring is arranged between the valve core and the valve inner body.

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