High-sealing-performance valve element structure and reversing valve with high-sealing-performance valve element structure

Abstract

According to the high-sealing-performance valve element structure and the reversing valve with the high-sealing-performance valve element structure, the valve element is rotationally connected into the stepped hole, and the outlet of the first channel and the inlet of the second channel are formed in the same cross section of the first stepped hole; by rotating the valve element, the two ends of the first radial air channel can be communicated with or sealed with an outlet of the first channel and an inlet of the second channel respectively, the two ends of the second radial air channel can be communicated with or sealed with an outlet of the third channel and an inlet of the fourth channel respectively, and therefore the effect of sealing airflow is achieved; grease in a plurality of sealing grooves in the periphery of the sealing section flows out to enable the periphery of the sealing section to be attached to the sealing face, the effect of high sealing performance is achieved, a valve element pin hole is further formed and used for fixing the shaft body and keeping the axial directions of the first radial air channel and the second radial air channel, the valve element is axially fixed after rotating, and the using stability of the reversing valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid valves, and particularly relates to a high-sealing spool structure and a reversing valve with the same. Background Art

[0002] It is a device used to control the flow direction of fluids, usually used in hydraulic systems. They can control the flow direction of liquids in the hydraulic system, thereby realizing the motion control of machinery or equipment. The reversing valve usually has multiple working positions and can switch different fluid passages according to needs, so as to realize the motion control of actuators such as hydraulic cylinders and hydraulic motors.

[0003] For the existing reversing valve, the energization and de-energization of the coil on the pilot valve constitute the up and down movement of the moving iron core inside the solenoid valve to block the air inlet to achieve the isolation of the air flow. When there is a circuit fault, the reversing valve cannot be closed, so a manual switch is added to forcibly isolate the air flow to achieve the sealing effect. Since the manual switch is used in a high-temperature environment, the sealing part cannot be sealed by means of a sealing ring, so a hard-sealing method is adopted to minimize the dimensional gap as much as possible, but air leakage still occurs at the sealing part. Therefore, the inventor proposes a new sealing spool structure and a reversing valve with the sealing spool structure. Summary of the Utility Model

[0004] The problem to be solved by the utility model is to provide a spool structure with high sealing performance, and a reversing valve with such a sealing spool structure.

[0005] The technical solution adopted by the utility model to solve the above problems is as follows: A high-sealing spool structure includes a spool body, a shaft body connected to one side of the spool body, and a handle provided on the other side of the spool body. A sealing section and a radial air passage are provided on the shaft body. A plurality of sealing grooves are axially spaced on the outer periphery of the sealing section, and grease is filled in the sealing grooves; the radial air passage includes a first radial air passage and a second radial air passage arranged in parallel at intervals; a spool pin hole is radially opened on the spool body, and the axial direction of the spool pin hole is perpendicular to the axial direction of the radial air passage.

[0006] Compared with the prior art, in the present utility model, a sealing section and radial air channels are provided on the shaft body. A plurality of sealing grooves are axially spaced and opened on the outer periphery of the sealing section, and grease is filled in the sealing grooves. The filled grease can seep out to the outer periphery of the sealing section on the premise of ensuring the rotational connection of the shaft body, so as to fill the gap between the rotational connection of the sealing section and other components, prevent air from flowing out of the gap and leaking air at the sealing section. The first radial air channel and the second radial air channel are arranged in parallel at intervals. The rotating valve core can change the axis of the first radial air channel and the second radial air channel, so that the first radial air channel and the second radial air channel are closed to the air inlet channel. A valve core pin hole is also provided to fix the shaft body and maintain the axis of the first radial air channel and the second radial air channel.

[0007] For a high-sealing valve core structure of the present utility model, a limiting track is opened on the outer periphery of the valve core body. The limiting track includes two limiting section tracks with a running track perpendicular to the valve core pin hole and a transition section track connecting the two limiting section tracks and having a running track coaxial with the valve core body.

[0008] For a high-sealing valve core structure of the present utility model, the cross-section of the sealing groove is concave square or semi-circular.

[0009] For a high-sealing valve core structure of the present utility model, the grease is high and low temperature vacuum lubricating fluorine grease.

[0010] For a high-sealing valve core structure of the present utility model, a relief groove is provided at the connection between the shaft body and the valve core body.

[0011] A reversing valve with a high-sealing valve core includes a valve body and the above-mentioned valve core. The valve body is provided with a stepped hole, a first channel, a second channel, a chamber, a third channel, a fourth channel, a piston chamber, and a positioning pin hole. The valve core is rotatably connected in the stepped hole. The stepped hole includes a first stepped hole and a second stepped hole. The chamber is communicated with the second channel and the third channel. The fourth channel is communicated with the piston chamber. The outlet of the first channel and the inlet of the second channel are arranged on the same cross-section of the first stepped hole. The outlet of the third channel and the inlet of the fourth channel are arranged on the same cross-section of the first stepped hole. A sealing surface is provided at the end of the first stepped hole. The outer periphery of the sealing section is attached to the sealing surface. The positioning pin hole includes a first positioning pin hole and a second positioning pin hole arranged on the same cross-section of the second stepped hole, and the axes of the first positioning pin hole and the second positioning pin hole are perpendicular to each other.

[0012] When the valve core rotates to a position where the first positioning pin hole is coaxial with the valve core pin hole, both ends of the first radial air passage are respectively closed with the first passage and the second passage, and both ends of the second radial air passage are respectively closed with the third passage and the fourth passage; when the valve core rotates to a position where the second positioning pin hole is coaxial with the valve core pin hole, both ends of the first radial air passage are respectively communicated with the first passage and the second passage, and both ends of the second radial air passage are respectively communicated with the third passage and the fourth passage.

[0013] In a reversing valve with a valve core having high sealing performance according to the present invention, a limiting rod is installed in the second stepped hole, and the limiting rod is arranged parallel to the second positioning pin hole. When the valve core rotates to a position where the first positioning pin hole is coaxial with the valve core pin hole, the outer periphery of the limiting rod abuts against the bottom surface of the limiting section track.

[0014] In a reversing valve with a valve core having high sealing performance according to the present invention, a fillet is provided along the circumference of the connection between the first stepped hole and the second stepped hole.

[0015] Beneficial effects: By rotatably connecting the valve core in the stepped hole, setting the outlet of the first passage and the inlet of the second passage on the same cross-section of the first stepped hole, rotating the valve core can make both ends of the first radial air passage respectively communicate with or be closed with the outlet of the first passage and the inlet of the second passage, and make both ends of the second radial air passage respectively communicate with or be closed with the outlet of the third passage and the inlet of the fourth passage, so as to achieve the effect of sealing the air flow. And by making the outer periphery of the sealing section fit with the sealing surface, the grease in the several sealing grooves at the outer periphery of the sealing section flows out to make the outer periphery of the sealing section fit with the sealing surface, achieving the effect of high sealing performance. There is also a valve core pin hole for fixing the shaft body, maintaining the axial directions of the first radial air passage and the second radial air passage, making the valve core axially fixed after rotation, and improving the stability of the use of the reversing valve. Description of the Drawings

[0016] Figure 1 It is an overall cross-sectional view of the reversing valve when the valve core of the present invention rotates to a position where the first positioning pin hole 5.8.1 is coaxial with the valve core pin hole 1.1;

[0017] Figure 2 It is a three-dimensional view of the valve core of the present invention;

[0018] Figure 3 It is an overall cross-sectional view of the reversing valve when the valve core of the present invention rotates to a position where the first positioning pin hole 5.8.1 is coaxial with the valve core pin hole 1.1;

[0019] Figure 4 It is an overall cross-sectional view of the reversing valve when the valve core of the present invention rotates to a position where the second positioning pin hole 5.8.2 is coaxial with the valve core pin hole 1.1.

[0020] Illustration: 1. Spool body; 1.1. Spool pin hole; 1.2. Limiting track; 1.2.1. Limiting section track; 1.2.2. Transition section track; 2. Relief groove; 3. Shaft body; 3.1. Sealing section; 3.1.1. Sealing groove; 3.2. First radial air passage; 3.3. Second radial air passage; 4. Handle; 5. Valve body; 5.1. Step hole; 5.1.1. First step hole; 5.1.11. Sealing surface; 5.1.2. Second step hole; 5.2. First channel; 5.3. Second channel; 5.4. Chamber; 5.5. Third channel; 5.6. Fourth channel; 5.7. Piston chamber; 5.8. Positioning pin hole; 5.8.1. First positioning pin hole; 5.8.2. Second positioning pin hole; 5.9. Limiting rod; 6. Piston valve; 6.1. Piston spool; 6.2. Sealing part; 6.3. Rear cover; 6.4. Piston spring; 6.5. Inlet; 6.6. Outlet. Detailed implementation mode

[0021] Before detailing any embodiments of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components described in the following description or illustrated in the following drawings. The present invention is capable of other embodiments and of being practiced or carried out in various ways. Additionally, it should be understood that the language and terminology used herein are for the purpose of description and should not be regarded as limiting. As used herein, the terms "including" or "having" and their variants are intended to cover the listed items and their equivalents as well as additional items. Unless otherwise specified or limited, the terms "mounted", "connected", "supported", and "coupled" and their variants are used broadly and cover both direct and indirect mounting, connection, support, and coupling. Further, "connected" and "coupled" are not limited to physical or mechanical connection or coupling.

[0022] And, on the one hand, in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention; on the other hand, the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "a" should not be construed as limiting the quantity.

[0023] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and without departing from the said principles, the embodiments of the present invention can have any deformation or modification.

[0024] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0025] Please refer to Figures 1-4 A directional control valve with a high-sealing spool, comprising a valve body 5 and a spool.

[0026] Please refer to Figure 2 , specifically, the spool structure includes a spool body 1, a shaft body 3 connected to one side of the spool body 1, and a handle 4 provided on the other side of the spool body 1. A sealing section 3.1 and a radial air passage are provided on the shaft body 3. A plurality of sealing grooves 3.1.1 are axially spaced on the outer periphery of the sealing section 3.1. The cross-section of the sealing groove 3.1.1 is an inwardly concave square or semi-circular shape, and the sealing groove 3.1.1 is filled with grease, and the grease is high and low temperature vacuum lubricating fluorine grease; the radial air passage includes a first radial air passage 3.2 and a second radial air passage 3.3 arranged in parallel at intervals; a spool pin hole 1.1 is radially opened on the spool body 1, and the axial direction of the spool pin hole 1.1 is perpendicular to the axial direction of the radial air passage.

[0027] A limiting track 1.2 is opened on the outer periphery of the spool body 1. The limiting track 1.2 includes two limiting section tracks 1.2.1 whose running tracks are perpendicular to the spool pin hole 1.1 and a transition section track 1.2.2 that connects the two limiting section tracks 1.2.1 and whose running track is coaxial with the spool body 1.

[0028] A limiting track 1.2 is opened on the outer periphery of the spool body 1. The limiting track 1.2 includes two limiting section tracks 1.2.1 whose running tracks are perpendicular to the spool pin hole 1.1 and a transition section track 1.2.2 that connects the two limiting section tracks 1.2.1 and whose running track is coaxial with the spool body 1.

[0029] Furthermore, a relief groove 2 is provided at the connection between the shaft body 3 and the spool body 1.

[0030] Please refer to Figures 1-4, specifically, the valve body 5 is provided with a stepped hole 5.1, a first channel 5.2, a second channel 5.3, a chamber 5.4, a third channel 5.5, a fourth channel 5.6, a piston chamber 5.7, and a positioning pin hole 5.8. The valve core is rotatably connected in the stepped hole 5.1. The stepped hole 5.1 includes a first stepped hole 5.1.1 and a second stepped hole 5.1.2. A fillet is provided along the edge of the connection between the first stepped hole 5.1.1 and the second stepped hole 5.1.2. The chamber 5.4 communicates with the second channel 5.3 and the third channel 5.5, and the fourth channel 5.6 communicates with the piston chamber 5.7. The outlet of the first channel 5.2 and the inlet of the second channel 5.3 are arranged on the same cross-section of the first stepped hole 5.1.1. The outlet of the third channel 5.5 and the inlet of the fourth channel 5.6 are arranged on the same cross-section of the first stepped hole 5.1.1. The end of the first stepped hole is provided with a sealing surface 5.1.11, and the outer periphery of the sealing section 3.1 fits with the sealing surface 5.1.11. The positioning pin hole 5.8 includes a first positioning pin hole 5.8.1 and a second positioning pin hole 5.8.2 arranged on the same cross-section of the second stepped hole 5.1.2, and the axes of the first positioning pin hole 5.8.1 and the second positioning pin hole 5.8.2 are perpendicular to each other;

[0031] When the valve core rotates to the position where the first positioning pin hole 5.8.1 is coaxial with the valve core pin hole 1.1, both ends of the first radial air passage 3.2 are closed with the first channel 5.2 and the second channel 5.3 respectively, and both ends of the second radial air passage 3.3 are closed with the third channel 5.5 and the fourth channel 5.6 respectively; when the valve core rotates to the position where the second positioning pin hole 5.8.2 is coaxial with the valve core pin hole 1.1, both ends of the first radial air passage 3.2 are communicated with the first channel 5.2 and the second channel 5.3 respectively, and both ends of the second radial air passage 3.3 are communicated with the third channel 5.5 and the fourth channel 5.6 respectively.

[0032] Furthermore, a limiting rod 5.9 is installed in the second stepped hole 5.1.2. The limiting rod 5.9 is arranged parallel to the second positioning pin hole 5.8.2. When the valve core rotates to the position where the first positioning pin hole 5.8.1 is coaxial with the valve core pin hole 1.1, the outer periphery of the limiting rod 5.9 abuts against the bottom surface of the limiting section track 1.2.1.

[0033] The gas entering from the inlet of the first channel 5.2 sequentially passes through the first channel 5.2, the first radial air passage 3.2, the second channel 5.3, the chamber 5.4, the third channel 5.5, the second radial air passage 3.3, and the fourth channel 5.6, and enters the piston chamber 5.7. A driving chamber 6.3 is provided in the piston chamber 5.7. The piston valve 6 includes a piston valve core 6.1 and a sealing portion 6.2;

[0034] The piston valve 6 is fixed within the piston chamber 5.7, where the piston valve core 6.1 is disposed within the piston valve 6; the driving chamber 6.3 communicates with the fourth passage 5.6, and the piston valve core 6.1 is movably disposed within the piston valve 6; during the movement of the piston valve core 6.1, the sealing portion 6.2 makes contact with or disengages from the piston valve 6.

[0035] Further, the piston valve core 6.1; further including a rear cover 6.3 disposed at one end of the piston valve 6, and a piston spring 6.4 disposed on the rear cover 6.3; one end of the piston valve core 6.1 abuts against the piston spring 6.4; the piston valve 6 is provided with an inlet 6.5 at both ends and an outlet 6.6 disposed between the two inlets 6.5;

[0036] In actual use, specifically, liquid inlets communicating with the two inlets 6.5 are respectively provided at both ends on one side of the piston chamber 5.7, and a liquid outlet communicating with the outlet 6.6 is provided in the middle. A sealing inclined surface is provided at one end of the sealing portion 6.2 facing the outlet 6.6, and sealing inclined surfaces are also provided at the positions on the inner wall of the piston valve 6 at both ends of the outlet 6.6. When the two sealing inclined surfaces abut against each other, the corresponding inlet 6.5 cannot conduct, while the inlet 6.5 at the other end conducts;

[0037] The upper end of the piston valve core 6.1, the piston valve body, and the piston chamber 5.7 enclose to form the driving chamber 6.3. Gas is input into the driving chamber 6.3 through the fourth passage 5.6. The air pressure drives the piston valve core 6.1 to move within the piston valve 6 towards the end where the rear cover 6.3 is located. The piston valve core 6.1 can also reset under the action of the piston spring 6.4, and the two inlets 6.5 conduct alternately, thereby realizing the function of a two-position three-way.

[0038] The above only describes the best embodiments of the present invention, but it should not be construed as a limitation on the claims. The present invention is not limited to the above embodiments, and its specific structure allows changes. All changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A high-sealing spool structure, characterized in that: It includes a valve core body (1), a shaft body (3) connected to one side of the valve core body (1), and a handle (4) arranged on the other side of the valve core body (1). A sealing section (3.1) and a radial air passage are provided on the shaft body (3). A number of sealing grooves (3.1.1) are axially spaced on the outer periphery of the sealing section (3.1), and grease is filled in the sealing grooves (3.1.1). The radial air passage includes a first radial air passage (3.2) and a second radial air passage (3.3) arranged in parallel at intervals. A valve core pin hole (1.1) is radially opened on the valve core body (1), and the axis of the valve core pin hole (1.1) is perpendicular to the axis of the radial air passage.

2. The high-sealing spool structure according to claim 1, characterized in that: A limit track (1.2) is provided on the outer periphery of the valve core body (1). The limit track (1.2) includes two limit section tracks (1.2.1) with a running track perpendicular to the valve core pin hole (1.1) and a transition section track (1.2.2) connecting the two limit section tracks (1.2.1) and having a running track coaxial with the valve core body (1).

3. A highly sealed valve core structure according to claim 1, characterized in that: The cross-section of the sealing groove (3.1.1) is an inwardly concave square or semi-circular shape.

4. A high-sealing spool structure according to claim 1, characterized in that: The grease is a high and low temperature vacuum lubricating fluorinated grease.

5. A highly sealed valve core structure according to claim 1, characterized in that: A relief groove (2) is provided at the connection between the shaft body (3) and the valve core body (1).

6. A directional valve with a spool having high sealing performance, comprising a valve body (5) and the spool according to any one of claims 1-5, characterized in that, A stepped hole (5.1), a first channel (5.2), a second channel (5.3), a chamber (5.4), a third channel (5.5), a fourth channel (5.6), a piston chamber (5.7), and a positioning pin hole (5.8) are provided on the valve body (5). The valve core is rotatably connected in the stepped hole (5.1). The stepped hole (5.1) includes a first stepped hole (5.1.1) and a second stepped hole (5.1.2). The chamber (5.4) is communicated with the second channel (5.3) and the third channel (5.5). The fourth channel (5.6) is communicated with the piston chamber (5.7). The outlet (6.6) of the first channel (5.2) and the inlet of the second channel (5.3) are arranged on the same cross-section of the first stepped hole (5.1.1). The outlet (6.6) of the third channel (5.5) and the inlet of the fourth channel (5.6) are arranged on the same cross-section of the first stepped hole (5.1.1). A sealing surface (5.1.11) is provided at the end of the first stepped hole. The outer periphery of the sealing section (3.1) is attached to the sealing surface (5.1.11). The positioning pin hole (5.8) includes a first positioning pin hole (5.8.1) and a second positioning pin hole (5.8.2) arranged on the same cross-section of the second stepped hole (5.1.2). The axes of the first positioning pin hole (5.8.1) and the second positioning pin hole (5.8.2) are perpendicular to each other. When the valve core rotates to a position where the first positioning pin hole (5.8.1) is coaxial with the valve core pin hole (1.1), both ends of the first radial air passage (3.2) are respectively closed with the first passage (5.2) and the second passage (5.3), and both ends of the second radial air passage (3.3) are respectively closed with the third passage (5.5) and the fourth passage (5.6); when the valve core rotates to a position where the second positioning pin hole (5.8.2) is coaxial with the valve core pin hole (1.1), both ends of the first radial air passage (3.2) are respectively communicated with the first passage (5.2) and the second passage (5.3), and both ends of the second radial air passage (3.3) are respectively communicated with the third passage (5.5) and the fourth passage (5.6).

7. The reversing valve with a high-sealing spool according to claim 6, characterized in that, A limiting rod (5.9) is installed in the second stepped hole (5.1.2), and the limiting rod (5.9) is arranged parallel to the second positioning pin hole (5.8.2). When the valve core rotates to a position where the first positioning pin hole (5.8.1) is coaxial with the valve core pin hole (1.1), the outer periphery of the limiting rod (5.9) abuts against the bottom surface of the limiting section track (1.2.1).

8. The reversing valve with a high-sealing spool according to claim 6, characterized in that, A fillet is provided along the circumference of the connection between the first stepped hole (5.1.1) and the second stepped hole (5.1.2).

Images