Valve element sealing and extending mechanism

Abstract

The utility model is applicable to the technical field of multi-way valves, and provides a valve core sealing and extending mechanism which comprises a valve body, a valve rod capable of reciprocating is arranged in the valve body in a sliding and penetrating manner, one end of the valve rod penetrates out of the valve body, an end cover is detachably connected to the side wall of the valve body at the penetrating-out end of the valve rod, an extending seat matched with the valve rod is arranged in the end cover, and the extending seat is fixedly connected with the valve rod. At least one first sealing ring is arranged between the extension seat and the valve rod, and at least one second sealing ring is arranged between the extension seat and the valve body. Therefore, the sealing device not only can guarantee a good sealing effect and avoid oil leakage, but also can be protected, the service life of the device is prolonged, and the operation precision of the device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-way valves, in particular to a valve core sealing extension mechanism. Background Art

[0002] Multi-way valve is an important component of engineering machinery that uses hydraulic pressure as the lifting driving force. Multi-way valve is widely used in engineering machinery, mining, metallurgy, shipbuilding, medicine and other industries.

[0003] There are many kinds of multi-way valves in the prior art, such as a multi-way valve with adjustable feed speed with publication number CN220488368U, which includes a valve body, an oil inlet channel and an oil return channel are provided in the valve body, a plurality of bypass holes are evenly provided on the oil inlet channel and the oil return channel, a mounting hole is provided on the valve body directly below the plurality of bypass holes, and a process plug is installed at one end of the oil inlet channel and the oil return channel; a plurality of reversing valves are provided, and the plurality of reversing valves are fixedly installed on the valve body; a speed regulating group Parts are embedded in the valve body, and the speed regulation assembly includes a tee, a sealing cover, a driving rod and a blocking piece. One end of the tee is threadedly installed on the other end of the oil inlet channel, and the end of the tee connected to the oil inlet channel is symmetrically provided with fan-shaped flow holes; a conducting part, a conducting part used for connecting the reversing valve with the oil inlet channel and the oil return channel, is embedded in the bypass hole, which can realize multi-stage speed regulation, but the sealing structure and function of the above device are relatively simple, which is not convenient for protecting the valve core and is still inconvenient to use.

[0004] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] In view of the above-mentioned defects, the purpose of the utility model is to provide a valve core seal extension mechanism, which can not only ensure a good sealing effect and avoid oil leakage, but also protect the device, extend the service life of the device, and improve the operating accuracy of the device.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a valve core sealing extension mechanism, including: a valve body, in which a valve stem that can reciprocate is slidably inserted, one end of the valve stem passes through the valve body, and an end cover is detachably connected to the side wall of the valve body at the end where the valve stem passes through, an extension seat that cooperates with the valve stem is provided in the end cover, at least one first sealing ring is provided between the extension seat and the valve stem, and at least one second sealing ring is provided between the extension seat and the valve body.

[0007] According to the valve core sealing extension mechanism of the utility model, the extension seat is provided with a through hole matched with the valve stem, and the extension seat, the through hole and the valve stem are concentric.

[0008] According to the valve core sealing extension mechanism of the utility model, at least one first groove is provided on the inner side wall of the through hole, and at least one second groove is provided on the side wall of one end of the extension seat close to the valve body.

[0009] According to the valve core sealing extension mechanism of the utility model, the first sealing ring is arranged in the first groove, the second sealing ring is arranged in the second groove, and the first sealing ring and the first groove, the second sealing ring and the second groove are all interference fit.

[0010] According to the valve core sealing extension mechanism of the utility model, one end of the extension seat close to the valve body is provided with a flange matched with the end cover.

[0011] According to the valve core sealing extension mechanism of the utility model, one end of the valve stem away from the end cover is connected to the driving assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view of the utility model;

[0013] Figure 2 It is a front sectional view of the utility model;

[0014] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of part A;

[0015] In the figure: 1-valve body, 11-P channel, 12-T channel, 13-one-way channel, 2-lifting link, 21-A channel, 22-B channel, 23-valve stem, 24-end cover, 25-extension seat, 26-first sealing ring, 27-second sealing ring, 3-drive assembly, 31-power box, 32-drive member, 33-driving gear, 34-transmission shaft, 35-transmission gear, 36-driven gear, 37-threaded shaft, 38-internal threaded sleeve. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] See also Figure 1 to Figure 3 The utility model provides a valve core sealing extension mechanism, comprising:

[0018] The valve body 1 is provided with a P channel 11 and a T channel 12 therein. The P channel 11 is connected to the hydraulic pump, and the T channel 12 is connected to the hydraulic oil tank.

[0019] At least one lifting link 2 is arranged on the valve body 1, and the lifting links 2 include channel A 21 and channel B 22, wherein a hydraulic lock is provided in channel A 21, and channel A 21 and channel B 22 are both connected to channel P 11. A valve stem 23 cooperating with channel A 21 and channel B 22 is slidably provided in the valve body 1, and a first corresponding groove and a second corresponding groove are provided on the valve stem 23. The first corresponding groove can connect channel P 11 and channel A 21, and the second corresponding groove can connect channel P 11 and channel B 22 (channel P 11 and channel A 21, channel P 11 and channel B 22 are not connected at the same time). One end of the valve stem 23 passes through the valve body 1, and an end cover 24 is provided on the side wall of the valve body 1 at the end where the valve stem 23 passes through, and an extension seat 25 is provided between the end cover 24 and the valve body 1. The extension seat 25 is concentric with the valve stem 23, and a through hole matching the valve stem 23 is provided in the middle of the extension seat 25. At least one first groove is provided on the side wall of the inner ring of the through hole, and at least one first sealing ring 26 is provided in the first groove. At least one second groove is provided on the side wall of the extension seat 35 close to the valve body 1, and at least one second sealing ring 27 is provided in the second groove. The first sealing ring 26 and the first groove, and the second sealing ring 27 and the second groove are all interference fit. The end of the extension seat 25 close to the valve body 1 is provided with a flange that can match the end cover 24.

[0020] At least one driving assembly 4 is matched with the lifting link 2 in a one-to-one manner. A driving assembly 3 is provided at one end of the valve stem 23. The driving assembly 3 includes a power box 31 and a driving member 32. The power box 31 is connected to the side wall of the valve body 1. A driving member 32 is provided in the power box 31. A driving gear 33 is provided on the output shaft of the driving member 32. A transmission shaft 34 is rotatably provided in the power box 31. Both ends of the transmission shaft 34 are respectively rotatably connected to the two end side walls of the power box 31. A transmission gear 35 meshing with the driving gear 33 is provided on the transmission shaft 34. The transmission gear 35 is meshed and connected with a driven gear 36. The driven gear 36 is provided on a threaded shaft 37. One end of the threaded shaft 37 is rotatably connected to the side wall of the power box 31. The other end of the threaded shaft 37 penetrates into the valve body 1 and is threadedly connected to an internal threaded sleeve 38. The inner ring side wall of the internal threaded sleeve 38 is provided with a thread matching the threaded shaft 37. The internal threaded sleeve 38 and the valve stem 23 are matched in a one-to-one manner.

[0021] See also Figure 1 to Figure 3 Preferably, a one-way channel 13 is provided between the A channel 21 and the B channel 22, the one-way channel 13 is connected to the P channel 11, and a one-way valve is provided in the one-way channel 13, and the one-way valve can prevent the hydraulic oil from flowing back.

[0022] See also Figure 1 to Figure 3 Preferably, the end cover 23 and the valve body 1 are both detachably connected, specifically, bolted.

[0023] See also Figure 1 to Figure 3 Preferably, the driving member 32 is a rotary motor that can provide sufficient power.

[0024] During the implementation of the utility model: when the lifting link 2 is in operation, the driving member 32 drives the valve stem 23 to reciprocate. During the reciprocating motion of the valve stem 23, the first sealing ring 26 seals the gap between the through holes of the valve stem 23, and the second sealing ring 27 seals the gap between the extension seat 25 and the side wall of the valve body 1, thereby ensuring a good sealing effect. At the same time, compared with directly arranging the first sealing ring 26 between the valve body 1 and the valve stem 23, the extension seat 25 can prevent the groove body (the first corresponding groove, the second corresponding groove or other groove body) on the surface of the valve stem 23 from cutting the first sealing ring 26 when the valve stem 23 reciprocates, thereby extending the service life of the first sealing ring 26. At the same time, the end cover 24 can also provide a certain positioning effect for the valve stem 23.

[0025] The utility model provides a valve core sealing extension mechanism, which has the following beneficial effects:

[0026] 1. It can provide effective sealing for the valve body, avoid leakage of hydraulic oil when the valve stem reciprocates, and improve the safety of the device.

[0027] 2. It can avoid the interference between the groove on the surface of the valve stem and its first sealing ring when the valve stem reciprocates, thus extending the service life of the device;

[0028] 3. It can assist in positioning multiple valve stems, thus improving the movement accuracy of the valve stems.

[0029] In summary, the beneficial effects of the utility model are: it can not only ensure a good sealing effect and avoid oil leakage, but also protect the device, extend the service life of the device, and improve the operating accuracy of the device.

[0030] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] Of course, the present invention may have a variety of embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A valve core sealing extension mechanism, characterized in that: include: A valve body, in which a valve stem capable of reciprocating movement is slidably inserted, one end of the valve stem passes through the valve body, and an end cover is detachably connected to the side wall of the valve body at the end where the valve stem passes through, an extension seat cooperating with the valve stem is provided in the end cover, at least one first sealing ring is provided between the extension seat and the valve stem, and at least one second sealing ring is provided between the extension seat and the valve body.

2. The valve core seal extension mechanism according to claim 1, characterized in that: The extension seat is provided with a through hole matched with the valve stem, and the extension seat, the through hole and the valve stem are concentric.

3. The valve core seal extension mechanism according to claim 2, characterized in that: At least one first groove is provided on the inner side wall of the through hole, and at least one second groove is provided on the side wall of one end of the extended seat close to the valve body.

4. The valve core seal extension mechanism according to claim 3, characterized in that: The first sealing ring is arranged in the first groove, the second sealing ring is arranged in the second groove, and there is interference fit between the first sealing ring and the first groove, and between the second sealing ring and the second groove.

5. The valve core seal extension mechanism according to claim 1, characterized in that: The end of the extended seat close to the valve body is provided with a flange matched with the end cover.

6. The valve core seal extension mechanism according to claim 1, characterized in that: One end of the valve stem away from the end cover is connected to the drive assembly.

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