High-power multi-way reversing valve of loading machine

Abstract

The high-power multi-way reversing valve comprises a valve body, a flow channel, an O port, a P port, an A port, a B port, a valve rod and a valve element, the flow channel is formed in the valve body and communicated with the O port, the P port, the A port and the B port, the valve element is fixed to the valve rod, the valve rod is installed in the flow channel in a sliding mode, and valve sleeves are symmetrically installed on the flow channel between the P port and the A port and the B port. A conical sealing opening is formed in the end, close to the valve element, of the valve sleeve, a conical reducing opening is formed in the other end of the valve sleeve, a radial sealing table is arranged on the joint section of the conical sealing opening and the conical reducing opening, conical sealing sections are symmetrically arranged at the two ends of the valve element, and elastic compensation rings are further embedded in the outer end faces of the conical sealing sections. The conical sealing opening and the conical surface sealing section are arranged to bear main sealing pressure, and the elastic compensation ring is matched with the radial sealing table to compensate an abrasion gap and provide dynamic sealing compensation, so that the sealing ring can have a good sealing effect under a high-pressure working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to multiway reversing valve technical field especially a kind of loading machinery high-power multiway reversing valve. BACKGROUND

[0002] High-power multiway reversing valve is often used in loading machinery, since it can quickly switch the flow direction of hydraulic oil, realize the quick action of actuator, for example, in loading operation, the lifting and overturning of bucket need quick response, to reduce cycle time, so it can significantly improve the work efficiency of loading machinery.

[0003] However, the valve core and valve body of existing high-power multiway reversing valve mainly adopt plane structure sealing, and plane sealing structure is easy to wear when frequently reversing, thereby leading to the increase of internal leakage under high pressure condition, and significant energy loss.

[0004] Therefore, we propose a kind of loading machinery high-power multiway reversing valve to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model is to provide a kind of loading machinery high-power multiway reversing valve to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of loading machinery high-power multiway reversing valve, including valve body, flow passage, O port, P port, A port, B port, valve rod and valve core, the flow passage is set up in valve body, and is connected O port, P port, A port and B port, the valve core is fixed on valve rod, and valve rod is slidably installed in flow passage, for switching P port and A port / B port communication, the flow passage between P port and A port and B port is symmetrically installed with valve sleeve, the one end of this valve sleeve close to valve core is equipped with conical sealing mouth, and the other end of valve sleeve is equipped with conical tapering mouth, the junction section of conical sealing mouth and conical tapering mouth is equipped with radial sealing platform, the both ends of valve core are symmetrically equipped with the conical sealing section matched with conical sealing mouth sealing, and the outer end surface of conical sealing section is also inlaid with elastic compensation ring for abutting radial sealing platform.

[0008] In further embodiments, three layers of guide vanes are staggered on the inner wall of the P port, each layer containing six guide vanes, and each layer of guide vanes is uniformly distributed in the circumferential direction.

[0009] In further embodiments, the cross-sectional structure of the guide vanes adopts an airfoil structure.

[0010] In further embodiments, helical ribs are provided on the inner wall of the A port and the B port close to the flow passage, and honeycomb filters are installed on the inner wall of the A port and the B port close to the tail end of the helical ribs.

[0011] In further embodiments, the helical direction of the helical ribs in the A port and the helical ribs in the B port are opposite.

[0012] In further embodiments, an annular mounting groove is formed on the outer end face of the tapered sealing section, and the elastic compensation ring partially protrudes from the outer end face of the tapered sealing section when the elastic compensation ring is mounted in the annular mounting groove.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The tapered sealing port and the tapered sealing section bear the main sealing pressure, and the elastic compensation ring and the radial sealing platform can compensate for the wear gap, provide dynamic sealing compensation, and enable the utility model to have good sealing effect under high pressure working conditions, thereby reducing the energy loss by reducing the internal leakage.

[0015] The utility model discloses the flow guide vane, the valve sleeve, the helical rib and the honeycomb filter screen form the multistage rectification to the oil liquid in the flow channel, inhibit pressure fluctuation and turbulence disturbance, promote energy efficiency and flow uniformity, and further enhance system reliability and life. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the half cross section structure schematic drawing of the utility model;

[0017] Fig. 2 It is the valve sleeve and valve core installation solid structure schematic drawing of the utility model;

[0018] Fig. 3 It is the valve sleeve and valve core installation cross section structure schematic drawing of the utility model.

[0019] In the drawing: 1, valve body; 2, flow channel; 3, O port; 4, P port; 41, flow guide vane; 5, A port; 6, B port; 7, valve rod; 8, valve core; 81, tapered sealing section; 82, elastic compensation ring; 9, valve sleeve; 91, tapered sealing port; 92, radial sealing platform; 93, tapered tapering port; 10, helical rib; 11, honeycomb filter screen; 12, pressure oil port. DETAILED DESCRIPTION

[0020] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0021] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] Please refer to Figs. 1-3The utility model provides a kind of loading machinery high-power multi-way reversing valve, including valve body 1, flow channel 2, O port 3, P port 4, A port 5, B port 6 are set in valve body 1, wherein, flow channel 2 is communicated O port 3, P port 4, A port 5 and B port 6, flow channel 2 is axially slidably installed with valve stem 7, and valve core 8 is fixed on valve stem 7, flow channel 2 is set in valve body 1, and, valve core 8 is fixed on valve stem 7, when valve stem 7 drives valve core 8 to move, for switching P port 4 and A port 5 / B port 6 communication, specifically, initially, valve core 8 blocks the passageway between P port 4 and A port 5, pressure oil port 12 is also provided in valve body 1, pressure oil port 12 is communicated with the head end of flow channel 2, so as to push the head end of valve stem 7 to move right when filling oil, so that valve core 8 blocks the passageway between P port 4 and B port 6, completes passageway switching, and the inner wall of flow channel 2 between P port 4 and A port 5 and B port 6 is symmetrically installed with valve sleeve 9, the end of the valve sleeve 9 close to valve core 8 is provided with tapered sealing port 91, and the other end of the valve sleeve 9 is provided with tapered tapering port 93, the junction of tapered sealing port 91 and tapered tapering port 93 is provided with radial sealing platform 92, both ends of valve core 8 are symmetrically provided with tapered sealing section 81 matched with tapered sealing port 91, when valve core 8 is in the middle or reversing, the tapered surface and the inner wall of tapered sealing port 91 form linear contact sealing, specifically, when processing and manufacturing, tapered sealing section 81 and tapered sealing port 91 are precisely ground and matched, and the outer end surface of tapered sealing section 81 is further embedded with elastic compensation ring 82 for abutting radial sealing platform 92, and specifically, annular mounting groove is set on the outer end surface of tapered sealing section 81, and when elastic compensation ring 82 is installed in annular mounting groove, part of elastic compensation ring 82 protrudes from the outer end surface of tapered sealing section 81, and the inner wall of valve sleeve 9 forms radial flexible sealing.

[0024] Further, tapered sealing port 91, radial sealing platform 92 and tapered tapering port 93 in valve sleeve 9 form a converging channel, which can reduce pressure loss when fluid flows and avoid high-frequency oscillation of the hydraulic system.

[0025] Three layers of guide vanes 41 are staggered on the inner wall of P port 4, each layer contains six guide vanes 41, and each layer of guide vanes 41 is uniformly distributed in the circumferential direction. Specifically, the cross-sectional structure of the guide vanes 41 adopts an airfoil structure. The roots of the guide vanes 41 are welded to the inner wall of the oil inlet cavity P port 4 of the valve body 1. By destroying large-scale vortices through the guide vanes 41, the turbulent intensity is reduced, and the disordered dissipation of fluid kinetic energy is reduced.

[0026] A port 5 and B port 6 are provided with spiral ribs 10 on the inner wall near one end of the flow channel 2, specifically, the spiral direction of the spiral rib 10 in the A port 5 and the spiral rib 10 in the B port 6 are opposite, the flow is guided through the spiral rib 10, the local low pressure area is eliminated, the minimum oil pressure is improved, the probability of cavitation is significantly reduced, and the honeycomb filter screen 11 is installed on the inner wall near the tail end of the spiral rib 10 of the A port 5 and the B port 6, the honeycomb filter screen 11 is fixed in the annular groove of the inner wall of the A port 5 and the B port 6 through laser welding, the high-speed fluid in the center area of the flow channel 2 is mixed with the low-speed area of the side wall, the uniformity of the outlet flow velocity distribution is improved, the oil liquid can vertically enter the working oil port, the bias flow impact is reduced, and the system is more stable.

[0027] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0028] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A high-power multi-way directional valve for loading machinery, comprising a valve body (1), a flow channel (2), an O port (3), a P port (4), an A port (5), a B port (6), a valve stem (7), and a valve core (8), wherein the flow channel (2) is formed within the valve body (1) and connects the O port (3), the P port (4), the A port (5), and the B port (6), and the valve core (8) is fixed on the valve stem (7), and the valve stem (7) is slidably installed within the flow channel (2) for switching the connection between the P port (4) and the A port (5) / B port (6), characterized in that: The valve sleeve (9) is symmetrically installed in the flow channel (2) between the P port (4) and the A port (5) and the B port (6), the valve sleeve (9) is provided with a tapered sealing port (91) at one end close to the valve core (8), and the other end of the valve sleeve (9) is provided with a tapered tapering port (93), the connecting section of the tapered sealing port (91) and the tapered tapering port (93) is provided with a radial sealing table (92), both ends of the valve core (8) are symmetrically provided with a tapered sealing section (81) matched with the tapered sealing port (91), and the outer end surface of the tapered sealing section (81) is further inlaid with an elastic compensation ring (82) for abutting the radial sealing table (92).

2. The high power multi-way directional valve for loading machines according to claim 1, characterized in that: The inner wall of the P port (4) is staggered with three layers of guide vanes (41), each layer contains six guide vanes (41), and each layer of guide vanes (41) is uniformly distributed in the circumferential direction.

3. The high power multi-way directional valve for loading machines according to claim 2, characterized in that: The cross-sectional structure of the guide vane (41) is in wing type structure.

4. The high power multi-way directional valve for loading machines according to claim 1, characterized in that: The inner wall of one end of the A port (5) and the B port (6) close to the flow channel (2) is provided with a spiral convex rib (10), and the inner wall of the tail end of the A port (5) and the B port (6) close to the spiral convex rib (10) is provided with a honeycomb filter screen (11).

5. A high power multi-way directional valve for a loading machine according to claim 4, characterized in that: The spiral directions of the spiral convex ribs (10) in the A port (5) and the B port (6) are opposite.

6. The high power multi-way directional valve for loading machines according to claim 1, characterized in that: The outer end surface of the tapered sealing section (81) is provided with an annular mounting groove, and when the elastic compensation ring (82) is installed in the annular mounting groove, the elastic compensation ring (82) partially protrudes from the outer end surface of the tapered sealing section (81).

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