Rotary distribution valve, distribution device and centralized lubrication system

Abstract

The utility model provides a rotary distribution valve, a distribution device and a centralized lubrication system. The rotary distribution valve is at least suitable for a lubricating system with lubricating grease as a lubricating medium and comprises at least one valve unit, and each valve unit comprises a valve seat and a valve element. A valve cavity is defined by the valve seat, the first end and the second end of the valve cavity are opposite in the first direction, at least one inlet is defined in the cavity wall of the first end, and at least one outlet is defined in the second end and / or the cavity wall between the first end and the second end. The valve element is rotatably arranged in the valve cavity, and at least one sub-cavity is defined, so that under the condition that the valve element rotates, the at least one sub-cavity is switched to be connected or disconnected between the at least one inlet and the at least one outlet. A driving end is formed, the driving end is located at the first end of the valve cavity, and the driving end is constructed to be directly or indirectly connected with a driving mechanism. And the problem that in the prior art, faults of an electromagnetic valve occur frequently is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment lubrication, in particular to a rotary distribution valve, a distribution device and a centralized lubrication system. Background Art

[0002] At present, in the centralized lubrication system using grease as the lubricating medium, a distribution valve is usually used to distribute the grease. The distribution valve includes a valve seat and a valve core. The valve seat has a valve cavity extending along the length direction of the valve seat and multiple grease inlet and outlet channels connected to the valve cavity. The valve seat is arranged in the valve cavity and reciprocates along the length direction of the valve cavity to realize the on-off state control between the grease inlet and outlet channels on the valve seat, thereby realizing the switching between the filling state and the stop state of the grease. However, the blockage failure of this distribution valve occurs frequently and has not been effectively solved. The reasons are as follows:

[0003] On the one hand, the axially moving valve core needs to directly push the grease during movement, and the resistance caused by the grease pressure is relatively large. In addition, the grease that adheres to and dries on the cavity wall needs to be scraped off by the axially moving valve core, and these greases also create great resistance to the axially moving valve core. This type of distribution valve is generally driven by electromagnetic force or grease thrust. In particular, the electromagnetic will generate heat, and the accumulated heat will cause the grease in the solenoid valve to separate faster, that is, the increase in temperature will cause the base oil in the grease to separate from the thickener faster, and the thickener will adhere to the cavity wall and the tube wall, which will further increase the resistance to the movement of the valve core.

[0004] On the other hand, the electromagnetic force or the thrust of grease are both indirectly driven, and the power loss is large during the working process. Moreover, when the axially moving valve core moves to the end of the stroke, the thrust of the electromagnetic force or the grease is the smallest, and the resistance is not significantly reduced.

[0005] The above two reasons easily cause the axially moving valve core to fail to move to the appropriate position, resulting in the grease inlet and outlet passages not being connected, which in turn causes frequent blockages of the distribution valve. Therefore, the centralized lubrication system is in urgent need of a distribution valve that solves the above technical problems. Utility Model Content

[0006] In view of the above problems, the utility model is proposed to provide a rotary distribution valve, distribution device and centralized lubrication system that overcome the above problems or at least partially solve the above problems. It can solve the problem that the axially moving valve core in the distribution valve of the prior art is easily stuck and blocked during operation, thereby causing the distribution valve to be unable to perform distribution work normally, and even the entire centralized lubrication system cannot work normally, thereby achieving the purpose of ensuring the normal operation of the distribution valve and the centralized lubrication system.

[0007] Specifically, the utility model provides a rotary distributing valve, which is at least suitable for a lubrication system using grease as a lubricating medium, and includes at least one valve unit, wherein the valve unit includes:

[0008] A valve seat, defining a valve cavity, wherein a first end and a second end of the valve cavity are opposite to each other in a first direction, at least one inlet is defined on a cavity wall of the first end, and at least one outlet is defined on a cavity wall of the second end and / or between the first end and the second end;

[0009] A valve core is rotatably disposed in the valve cavity and defines at least one sub-cavity to facilitate switching of at least one of the sub-cavities between at least one of the inlets and at least one of the outlets when the valve core rotates; and an active end is formed, the active end is located at the first end of the valve cavity, and the active end is constructed to be directly or indirectly connected to a driving mechanism.

[0010] Optionally, a sealing member is disposed between the valve seat and the valve core and is located at least between at least one of the inlets and at least one of the outlets.

[0011] Optionally, when there are at least two outlets, the seal is also located at least between at least two of the outlets.

[0012] Optionally, at least one fat inlet channel and at least one fat outlet channel are provided on the valve seat, one of the fat inlet channels is communicated with one of the inlets; one of the fat outlet channels is communicated with one of the outlets; the valve seat includes at least one valve cavity, each of which is provided with the valve core; the shape of the valve core is adapted to the shape of the valve cavity; the sub-cavity is located inside the valve core and is arranged along the axial direction of the valve core, the valve core also includes at least one oil distribution channel radially arranged inside the valve core and communicated with the sub-cavity, the sub-cavity has a sub-cavity inlet; the valve core has a working valve position and a rest valve position when rotating in the valve cavity;

[0013] When the valve is in the working position, the grease inlet passage, the sub-chamber inlet, the sub-chamber, the oil distribution passage and the grease outlet passage are connected in sequence;

[0014] When the valve is in the rest position, the oil distribution passage is offset relative to the grease outlet passage to close the oil distribution passage and the grease outlet passage.

[0015] Optionally, in one of the valve chambers, when the valve core is in the working valve position, one of the sub-chambers is connected to one of the grease outlet passages only through one of the oil distribution passages.

[0016] Optionally, in each valve chamber of a valve unit, each sub-chamber of the valve core is connected to only one grease outlet passage through one oil distribution passage at the same time.

[0017] Optionally, at least two oil distribution channels are arranged on the valve core, and at least two oil distribution channels are arranged at intervals along the circumference of the valve core.

[0018] Optionally, at least two oil distribution channels are arranged on the valve core, and at least two of the oil distribution channels are arranged at intervals along the axial direction of the valve core. There are at least two corresponding outlets on the valve cavity, and they correspond one to one with the oil distribution channels arranged at intervals along the axial direction.

[0019] Optionally, at least two groups of the oil distribution channels are axially spaced apart on the valve core, each group of the oil distribution channels includes at least two oil distribution channels, and projections of the oil distribution channels on a plane perpendicular to the axis of the valve core do not overlap.

[0020] Optionally, each of the grease outlet passages connected to one of the valve chambers is coplanar.

[0021] Optionally, the valve core is formed by splicing a plurality of coaxial valve core segments, and each of the valve core segments is non-rotatably fitted.

[0022] Optionally, the valve seat is formed by splicing a plurality of valve body units, and the valve body units are detachably sealed and connected to each other.

[0023] Optionally, the fat inlet channel is coaxially arranged with the sub-cavity, and the sub-cavity inlet and the fat inlet channel are located at the second end.

[0024] Optionally, the valve cavity and the valve core are both cylindrical, the fat inlet channel is arranged on the valve seat along the radial direction of the valve cavity, the sub-cavity inlet is arranged along the radial direction of the valve core, the circumferential surface of the valve core corresponding to the sub-cavity inlet is provided with a first annular groove, and the sub-cavity inlet is arranged in the first annular groove.

[0025] Optionally, the sub-cavity has a sub-cavity outlet, the sub-cavity outlet is located at the first end, the sub-cavity outlet is arranged along the radial direction of the valve core, the circumferential surface of the valve core corresponding to the sub-cavity outlet is provided with a second annular groove, and the sub-cavity outlet is arranged in the second annular groove.

[0026] Optionally, one of the valve core and the valve seat is provided with a first limit portion, and the other is provided with a second limit portion. When the valve core is at the starting position of rotation relative to the valve seat, the first limit portion and the second limit portion cooperate to determine the initial position of the valve core.

[0027] Optionally, one of the valve core and the valve seat is provided with an outwardly convex sliding block to constitute the first limiting portion, and the other is provided with an inwardly concave third annular groove, and a stopping protrusion is provided in the third annular groove to constitute the second limiting portion.

[0028] Optionally, a sensing body is provided on the outer peripheral surface of the valve core, and a sensor capable of detecting the sensing body is correspondingly provided on the valve seat; when the sensing body rotates with the valve core to the sensing range of the sensor, it can be detected by the sensor to determine the state of the valve core.

[0029] Optionally, the induction body is a permanent magnet, and the sensor is a Hall sensor.

[0030] Optionally, an angle sensor is provided on the driving mechanism or the valve core to detect the rotation angle of the valve core.

[0031] Optionally, a bearing is provided between the valve core and the valve seat.

[0032] Optionally, the driving mechanism comprises a stepping motor.

[0033] Optionally, the valve core is connected to an axial driver to drive the valve core to move axially, and a driving stroke of the axial driver is greater than or equal to a diameter of a grease outlet passage or an oil distribution passage.

[0034] Optionally, the axial drive includes a screw-nut mechanism, a crank-slider mechanism, or an electromagnetic drive mechanism.

[0035] The utility model also provides a dispensing device, comprising:

[0036] A rotary dispensing valve as described in any one of the above;

[0037] A controller is connected to the driving mechanism of the rotary dispensing valve to control the driving mechanism.

[0038] Optionally, the rotary distributing valve is provided with a metering device for detecting the grease flow rate.

[0039] Optionally, the metering device is located on the pipeline before the fat inlet passage of the valve seat and / or on the pipeline after the fat outlet passage of the valve seat.

[0040] Optionally, the controller may work independently, or an interface module may be provided to accept control from a control module of the system.

[0041] The utility model also provides a centralized lubrication system, comprising a lubrication pump and the distribution device as described above, wherein the number of the distribution device is at least one.

[0042] Optionally, the centralized lubrication system further comprises a control module to control the operation of the entire system, and the control module is connected to the controller of each distribution device.

[0043] In the rotary distribution valve, distribution device and centralized lubrication system of the utility model, the pressure of the grease is the highest at the inlet of the grease, and correspondingly, the resistance to the valve core is greater. If the drive mechanism is connected to the end far away from the inlet of the grease, that is to say, the resistance of the end of the valve core far away from the drive mechanism is the greatest. The drive mechanism first transmits the torque to the end of the valve core that is close to the drive mechanism and has a small resistance, and the valve core relies on its own rigidity to transmit the torque to the end far away from the drive mechanism and with a large resistance, which is easy to cause the valve core to twist, and then cause the inlet of the sub-chamber far away from the end of the drive mechanism and the inlet on the valve seat to not correspond, resulting in inaccurate working switching. Obviously, this problem can be avoided by setting the active end where the valve core is connected to the drive mechanism at the inlet of the grease. The drive mechanism directly transmits the torque to the active end to drive the rotation of the entire valve core, which ensures that the switching action of the valve core is reliable while also avoiding the deformation of the valve core during rotation.

[0044] Furthermore, the distribution valve in the prior art is switched on and off by an axially moving valve core. During the reciprocating operation, both ends of the axially moving valve core are subjected to pressure from the grease, especially at the two ends close to the valve seat where the pressure is greater, making it difficult for the valve core to move and placing higher demands on the mechanism providing power. In this embodiment, the rotary distribution valve is switched on and off by rotating the valve core at an angle, and the grease inlet is on the side of the valve cavity. Compared with the prior art, the rotary distribution valve is subjected to less and more uniform pressure from the grease, and the driving mechanism only needs less power to ensure the normal rotation of the valve core.

[0045] Furthermore, the prior art is to electromagnetically drive the valve core or directly drive the valve core through the pressure of grease. When the valve core moves axially, the force provided by the end close to the electromagnetic end or the end close to the high-pressure grease end is larger, and the force provided by the end far away from the electromagnetic end or the end far away from the high-pressure grease end is smaller, which eventually causes the valve core far away from the electromagnetic end or the end far away from the high-pressure grease end to fail to move in place. The driving mechanism has a continuous driving force, which directly drives the signaling valve core. In particular, after the rotary distribution valve has been working for a period of time, grease will enter between the valve core and the valve cavity, which will increase the resistance to the rotation of the valve core. At this time, the driving mechanism provides a larger driving force accordingly, thereby ensuring that the valve core rotates in place.

[0046] Furthermore, after working for a period of time, grease or dried grease adheres to the inner wall of the valve cavity. In the prior art, the axially movable valve core needs to scrape off the grease adhered or dried on the inner wall of the valve cavity before it can move normally. The valve core is subject to great resistance, which makes the valve core prone to stuck and blocked. In this embodiment, the moving state of the valve core of the rotary distribution valve is rotation. Compared with the prior art, the rotary distribution valve is subjected to less resistance from the thickener attached to the inner wall of the valve cavity.

[0047] Furthermore, only one oil distribution channel is connected to the grease outlet channel, that is, at the same time, only one outlet on a valve chamber flows out grease, which is not only convenient for measuring the grease output from the outlet, but also avoids damping distribution.

[0048] Furthermore, the oil passages on a valve core are arranged in a staggered manner, so that when one group of oil passages is connected to a corresponding grease outlet, another group of staggered oil passages is disconnected from the corresponding grease outlet, thereby avoiding the situation where grease is discharged from multiple grease outlets at the same time.

[0049] Furthermore, the design of the segmented splicing structure of the valve core makes the product tend to be modular and standardized, which not only significantly reduces the processing difficulty and processing cost, but also facilitates the adaptation to the lubrication needs in different scenarios. No matter how many or few lubrication points are required for different equipment, only the corresponding number of valve cores need to be assembled to adapt to them. There is no need to design multiple valve cores of different lengths according to different scenarios, which facilitates production, improves production efficiency, and saves production time.

[0050] Furthermore, the valve seat also adopts an assembled structure, which is also convenient for standardization and modularization, reducing costs and improving adaptability and versatility, further improving production efficiency

[0051] Furthermore, compared with the traditional mechanical limit structure, the cooperation between the induction body and the corresponding sensor can not only be used to determine the zero point or initial position of the valve core, but also can be used to determine the rotation state of the valve core, so as to timely determine and eliminate faults.

[0052] Furthermore, when the valve core rotates to switch the outlet, the oil distribution channel that does not need to discharge grease will be temporarily connected when passing through the corresponding grease outlet channel, causing grease leakage. In order to avoid such grease leakage, an axial driver can be provided so that when the valve core rotates, the valve core is temporarily driven to axially displace a certain amount to stagger the corresponding grease outlet channel, and the axial displacement of the valve core is driven to reset after the valve core rotates to the desired angle.

[0053] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0055] Figure 1 is a schematic structural diagram of a rotary dispensing valve according to an embodiment of the utility model;

[0056] Figure 2 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0057] Figure 3 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0058] Figure 4 yes Figure 3 Sectional view at AA in the middle;

[0059] Figure 5 is a schematic structural diagram of the connection of adjacent valve cores according to an embodiment of the utility model;

[0060] Figure 6 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0061] Figure 7 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0062] Figure 8 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0063] Fig. 9 for Figure 8 Sectional view at the middle BB;

[0064] Fig.10 is a schematic structural diagram of a valve core according to an embodiment of the utility model;

[0065] Fig.11 is a schematic structural diagram of a valve core according to another embodiment of the utility model;

[0066] Fig.12 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0067] Fig.13 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0068] Fig.14 is a schematic structural diagram of a rotary dispensing valve according to another embodiment of the utility model;

[0069] Fig.15 is a schematic structural diagram of a centralized lubrication system according to an embodiment of the utility model;

[0070] Fig.16 yes Fig.15 Enlarged view of point C in the middle. DETAILED DESCRIPTION

[0071] Refer to the following Figures 1 to 16 To describe the rotary distributing valve, distributing device and centralized lubrication system of the embodiment of the utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0072] Unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0073] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0074] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Figure 1is a schematic structural diagram of a rotary dispensing valve according to an embodiment of the utility model, such as Figures 2 to 14 The embodiment of the utility model provides a rotary distributing valve, which is at least suitable for a lubrication system using grease as a lubricating medium, and includes at least one valve unit, and the valve unit includes a valve seat 2 and a valve core 3. The valve seat 2 defines a valve cavity 22, and the first end and the second end of the valve cavity 22 are opposite to each other in a first direction, and at least one inlet is defined on the cavity wall of the first end, and at least one outlet is defined on the cavity wall of the second end and / or between the first end and the second end. The valve core 3 is rotatably disposed in the valve cavity 22, and defines at least one sub-cavity 31, so as to facilitate switching of at least one sub-cavity 31 between at least one inlet and at least one outlet when the valve core 3 rotates. And an active end is formed, and the active end is located at the first end of the valve cavity 22, and the active end is constructed to be directly or indirectly connected to a driving mechanism.

[0076] In the rotary distribution valve provided by the embodiment of the utility model, when grease needs to be distributed, the driving mechanism is started to drive the active end of the valve core 3 to rotate, so that the valve core 3 rotates in the valve cavity 22, and further makes at least one inlet and at least one outlet on the cavity wall communicate with the sub-cavity 31, that is, the inlet and the outlet are connected through the sub-cavity 31. Grease enters the sub-cavity 31 from the inlet on the cavity wall at the first end, and then reaches the outlet connected to the sub-cavity 31 through the sub-cavity 31, and flows out from the outlet. When there are at least multiple outlets, the valve core 3 can be driven to rotate by the driving mechanism to realize different angles of rotation of the valve core 3, and control different outlets to flow out grease, thereby realizing grease distribution.

[0077] At the inlet of the grease, the pressure of the grease is the highest, and correspondingly, the resistance to the valve core 3 is greater. If the drive mechanism is connected to the end away from the inlet of the grease, that is to say, the resistance of the end of the valve core 3 away from the drive mechanism is the greatest. The drive mechanism first transmits the torque to the end of the valve core 3 that is close to the drive mechanism and has a small resistance. The valve core 3 relies on its own rigidity to transmit the torque to the end away from the drive mechanism and with a large resistance, which can easily cause the valve core to twist, and then cause the inlet of the sub-chamber 31 away from the end of the drive mechanism and the inlet on the valve seat 2 to not correspond, resulting in inaccurate working switching. Obviously, this problem can be avoided by setting the active end where the valve core 3 is connected to the drive mechanism at the inlet of the grease. The drive mechanism directly transmits the torque to the active end to drive the rotation of the entire valve core 3, which ensures that the switching action of the valve core 3 is reliable while also avoiding deformation of the valve core 3 during rotation.

[0078] Furthermore, the distribution valve in the prior art is switched on and off by an axially moving valve core. During the reciprocating operation, both ends of the axially moving valve core are subjected to pressure from the grease, especially at the two ends close to the valve seat where the pressure is greater, making it difficult for the valve core to move and placing higher demands on the mechanism providing power. In this embodiment, the rotary distribution valve is switched on and off by rotating the angle of the valve core 3, and the grease inlet is on the side of the valve cavity. Compared with the prior art, the pressure from the grease borne by the rotary distribution valve is smaller and more uniform, and the driving mechanism only needs a smaller power to ensure the normal rotation of the valve core 3.

[0079] Furthermore, the prior art is to electromagnetically drive the valve core or directly drive the valve core through the pressure of grease. When the valve core moves axially, the force provided by the end close to the electromagnetic end or the end close to the high-pressure grease end is larger, and the force provided by the end far away from the electromagnetic end or the end far away from the high-pressure grease end is smaller, which eventually causes the valve core far away from the electromagnetic end or the end far away from the high-pressure grease end to fail to move in place. The driving mechanism has a continuous driving force, which directly drives the signaling valve core. In particular, after the rotary distribution valve has been working for a period of time, grease will enter between the valve core 3 and the valve cavity, which will increase the resistance to the rotation of the valve core. At this time, the driving mechanism provides a larger driving force accordingly, thereby ensuring that the valve core 3 rotates in place.

[0080] Furthermore, after working for a period of time, grease or dried grease adheres to the inner wall of the valve cavity. In the prior art, the axially movable valve core needs to scrape off the grease adhered or dried on the inner wall of the valve cavity before it can move normally. The valve core is subject to great resistance, which makes the valve core prone to stuck and blocked. In this embodiment, the moving state of the valve core 3 of the rotary distribution valve is rotation. Compared with the prior art, the rotary distribution valve is subjected to less resistance from the thickener attached to the inner wall of the valve cavity.

[0081] In this embodiment, the provision of multiple inlets, outlets and sub-cavities 31 not only increases the applicable scope of the rotary distributing valve, but also reduces the manufacturing cost of the lubrication system to a certain extent.

[0082] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, the rotary distributing valve further comprises a sealing member, which is arranged between the valve seat 2 and the valve core 3 and is located at least between at least one inlet and at least one outlet.

[0083] In this embodiment, the sealing ring 4 is provided to prevent the inlet and the outlet from being connected. There is a small gap between the valve core 3 and the valve cavity 22 of the valve seat 2. If the sealing ring 4 or other sealing structures are not provided, the grease can easily flow through the small gap, increasing the resistance to the rotation of the valve core 3. This arrangement separates the outlet and the inlet, preventing the grease from flowing between the outlet and the inlet through the gap between the valve seat 2 and the valve core 3.

[0084] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, when there are at least two outlets, the seal is also located at least between the at least two outlets.

[0085] In this embodiment, the sealing ring 4 can prevent the two outlets from being connected, that is, the sealing ring 4 separates each two outlets, preventing the grease from flowing in the small gap between the valve core 3 and the valve cavity 22 of the valve seat 2, or even entering different outlets to affect the grease distribution effect. The sealing ring 4 is arranged so that the grease flows out from the designated outlet, ensuring the smooth and safe operation of the lubrication system.

[0086] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, at least one fat inlet channel 21 and at least one fat outlet channel 23 are provided on the valve seat 2, and one fat inlet channel 21 is connected to an inlet. One fat outlet channel 23 is connected to an outlet. The valve seat 2 includes at least one valve cavity 22, and a valve core 3 is provided in each valve cavity 22. The shape of the valve core 3 is adapted to the shape of the valve cavity 22. The sub-cavity 31 is located inside the valve core 3 and is arranged along the axial direction of the valve core 3. The valve core 3 also includes at least one oil distribution channel 32 arranged radially inside the valve core 3 and connected to the sub-cavity 31. The sub-cavity 31 has a sub-cavity inlet 33. The valve core 3 has a working valve position and a rest valve position when rotating in the valve cavity 22.

[0087] When the valve is in the working position, the grease inlet passage 21, the sub-chamber inlet 33, the sub-chamber 31, the oil distribution passage 32 and the grease outlet passage 23 are connected in sequence.

[0088] When the valve is in the rest position, the oil distribution passage 32 is offset relative to the grease outlet passage 23 to close the oil distribution passage 32 and the grease outlet passage 23 .

[0089] In this embodiment, when the valve core 3 is in the working valve position, the valve core 3 rotates in the valve cavity 22 so that the grease inlet 21, the sub-cavity inlet 33, the sub-cavity 31, the oil distribution channel 32 and the grease outlet 23 are connected in sequence. At this time, the grease enters the rotary distribution valve from the grease inlet 21, and then enters the sub-cavity 31 through the sub-cavity inlet 33. The grease in the sub-cavity 31 enters the grease outlet 23 through the oil distribution channel 32, and finally flows out through the grease outlet 23. When the valve core 3 is in the rest valve position, the valve core 3 rotates in the valve cavity 22 so that the oil distribution channel 32 is offset relative to the grease outlet 23, and the oil distribution channel 32 is further closed with the grease outlet 23, so that the grease cannot flow out. The structure is simple and the operation is very convenient.

[0090] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, in a valve chamber 22 , when the valve core 3 is in the working valve position, a sub-chamber 31 is connected to a grease outlet channel 23 only through an oil distribution channel 32 .

[0091] In this embodiment, only one oil distribution channel 32 is connected to the grease outlet channel 23, that is, at the same time, only one outlet on a valve chamber 22 flows out grease, which is not only convenient for measuring the grease output of the outlet, but also prevents damping distribution. Damping distribution means that when at least two outlets are connected to the same oil supply path at the same time, the grease output of the outlet with small resistance is greater than the grease output of the outlet with large resistance, or even only the outlet with small resistance outputs grease. This embodiment can ensure that there will be no damping distribution, resulting in the grease output of a certain outlet failing to meet the requirements.

[0092] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, in each valve chamber 22 of a valve unit, each sub-chamber 31 of the valve core 3 is connected to only one grease outlet passage 23 through one oil distribution passage 32 at the same time.

[0093] In this embodiment, not only on one valve cavity 22, but between multiple valve cavities 22 on a valve seat 2, there is only one outlet for grease discharge at a time, thereby ensuring that the grease discharge amount meets the standard and avoiding damping distribution.

[0094] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, at least two oil distribution channels 32 are arranged on the valve core 3 , and at least two oil distribution channels 32 are arranged at intervals along the circumference of the valve core 3 .

[0095] In this embodiment, at least two oil distribution passages 32 are arranged at intervals along the circumference. As the rotary valve core 3 rotates, different oil distribution passages 32 can be connected to the grease outlet passage 23. The valve core 3 does not need to rotate too much to achieve the purpose of connecting the oil distribution passage 32 with the grease outlet passage 23. For example, when two oil distribution passages 32 are arranged along the circumference of the valve core 3, it only needs to rotate 180 degrees to switch to another oil distribution passage 32 for connection; when three oil distribution passages 32 are arranged along the circumference of the valve core 3, it only needs to rotate 120 degrees.

[0096] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, at least two oil distribution channels 32 are arranged on the valve core 3, and at least two oil distribution channels 32 are arranged at intervals along the axial direction of the valve core 3. There are at least two corresponding outlets on the valve cavity 22, and they correspond to the oil distribution channels 32 arranged at intervals along the axial direction.

[0097] In this embodiment, the oil distribution channels 32 on the valve core 3 are arranged at intervals along the axial direction, and corresponding grease outlet channels 23 are arranged at intervals. This axial arrangement of the oil distribution channels 32 facilitates the axial distribution of the grease outlet channels 23, making it easier to install and arrange the oil pipe joints on each grease outlet channel 23.

[0098] In some embodiments of the present invention, Figure 4 As shown, at least two groups of oil passages 32 are arranged on the valve core 3 along the axial direction at intervals, and each group of oil passages 32 includes at least two branch oil passages 32, and the projections of the branch oil passages 32 on the plane perpendicular to the axis of the valve core 3 do not overlap.

[0099] In this embodiment, the oil passages 32 on a valve core 3 are arranged in a staggered manner, so that when one group of oil passages 32 is connected to a corresponding grease outlet 23, another group of staggered oil passages 32 is disconnected from the corresponding grease outlet, thereby avoiding the situation where multiple grease outlets 23 discharge grease at the same time.

[0100] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, each grease outlet passage connected to a valve chamber 22 is coplanar.

[0101] In this embodiment, since an oil pipe joint needs to be installed on the grease outlet channel 23 and connected to the oil pipe, in order to facilitate the arrangement of the oil pipe and the oil pipe joint, make the arrangement more neat and save space, the various grease outlet channels 23 are arranged in the same plane.

[0102] In some embodiments of the present invention, Figure 8 As shown, the valve core 3 is formed by splicing a plurality of coaxial valve core segments, and each valve core segment is fitted with a non-rotatable joint.

[0103] In this embodiment, the design of the segmented splicing structure of the valve core 3 makes the product tend to be modular and standardized, which not only significantly reduces the processing difficulty and processing cost, but also facilitates the adaptation to the lubrication needs in different scenarios. No matter how many or few lubrication points are required for different equipment, only the corresponding number of valve cores 3 need to be assembled to adapt to them. There is no need to design a variety of valve cores 3 of different lengths according to different scenarios, which facilitates production, improves production efficiency, and saves production time.

[0104] In some embodiments of the present invention, Figure 5 and Figure 8 As shown, any two adjacent valve core sections can be connected by a stopper joint, with a pin 6 for positioning and plugging.

[0105] In some embodiments of the present invention, Figure 8 As shown, the valve seat 2 is formed by splicing a plurality of valve body units, and the valve body units are detachably sealed and connected to each other.

[0106] In this embodiment, the valve seat 2 also adopts an assembled structure, which is also convenient for achieving standardization and modularization, reducing costs and improving adaptability and versatility, thereby further improving production efficiency.

[0107] In some embodiments of the utility model, the grease inlet 21 is coaxially arranged with the sub-cavity 31, and the sub-cavity inlet 33 and the grease inlet 21 are located at the second end. In this embodiment, this structure can reduce the number of holes on the valve seat 2, and the grease flow resistance is also smaller.

[0108] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, the valve cavity 22 and the valve core 3 are both cylindrical, the fat inlet channel 21 is arranged on the valve seat 2 along the radial direction of the valve cavity 22, the sub-cavity inlet 33 is arranged along the radial direction of the valve core 3, and the circumferential surface of the valve core 3 corresponding to the sub-cavity inlet 33 is provided with a first annular groove 34, and the sub-cavity inlet 33 is arranged in the first annular groove 34.

[0109] In this embodiment, the valve cavity 22 and the valve core 3 are cylindrical structures, which are more convenient to process, lower in cost, easier to ensure precision, and easier to realize modular series connection than other rotary structures. The first annular groove 34 is provided so that the grease flowing into the grease inlet channel 21 can always flow into the radially arranged sub-cavity inlet 33 through the first annular groove 34, and then enter the sub-cavity 31, that is, the first annular groove 34 ensures that the inlet of the sub-cavity 31 radially arranged on the valve core 3 can always be in communication with the grease inlet channel 21 on the valve seat 2.

[0110] In some embodiments of the present invention, Figure 6As shown, the sub-cavity 31 has a sub-cavity outlet 35, which is located at the first end and is arranged along the radial direction of the valve core 3. The circumferential surface of the valve core 3 corresponding to the sub-cavity outlet 35 is provided with a second annular groove 36, and the sub-cavity outlet 35 is arranged in the second annular groove 36.

[0111] In this embodiment, the setting principle of the second annular groove 36 is the same as that of the first annular groove 34 in the above embodiment, which can ensure that the sub-cavity 31 can be connected with the outlet via the radially arranged sub-cavity outlet 35 so as to lead to the next valve cavity 22 or the sub-cavity 31 of the next rotary dispensing valve, thereby achieving the purpose of sharing the same fat supply source.

[0112] In some embodiments of the utility model, one of the valve core 3 and the valve seat 2 is provided with a first limit portion, and the other is provided with a second limit portion. When the valve core 3 is at the starting position of rotation relative to the valve seat 2, the first limit portion and the second limit portion cooperate to determine the initial position of the valve core 3.

[0113] In this embodiment, the provision of the first and second limit portions ensures that the valve core 3 can find the initial position of rotation, that is, the zero position, so as to accurately determine the rotation angle based on the initial position.

[0114] Furthermore, one of the valve core 3 and the valve seat 2 is provided with an outwardly convex sliding block to form a first limiting portion, and the other is provided with an inwardly concave third annular groove, and a stopping protrusion is provided in the third annular groove to form a second limiting portion.

[0115] In some embodiments of the utility model, a sensing body is provided on the outer peripheral surface of the valve core 3, and a sensor that can detect the sensing body is correspondingly provided on the valve seat 2. When the sensing body rotates with the valve core 3 to the sensor sensing range, it can be detected by the sensor to determine the state of the valve core 3.

[0116] In this embodiment, the cooperation between the induction body and the corresponding sensor, compared with the traditional mechanical limit structure, can not only be used to determine the zero point or initial position of the valve core 3, but also can be used to determine the rotation state of the valve core 3, so as to timely determine and eliminate faults.

[0117] In some embodiments of the present invention, the induction body is a permanent magnet 7 , and the sensor is a Hall sensor 8 .

[0118] In some embodiments of the present invention, an angle sensor is provided on the driving mechanism or the valve core 3 to detect the rotation angle of the valve core 3 .

[0119] In some embodiments of the present invention, a bearing is provided between the valve core 3 and the valve seat 2 .

[0120] In this embodiment, the bearing not only plays a guiding, positioning and supporting role for the valve core 3, but also can significantly reduce the resistance of the valve core 3 during rotation, reduce the kinetic energy consumption of the driving mechanism, and extend the service life of the rotary distribution valve and the driving mechanism.

[0121] In some embodiments of the present invention, Figures 1 to 3 and Figures 6 to 8 As shown, the driving mechanism includes a stepping motor 1 .

[0122] In this embodiment, the stepper motor 1 has the advantages of precise angle rotation, easy control, small size, and high stability.

[0123] In some embodiments of the present invention, the valve core 3 is connected to an axial driver to drive the valve core 3 to move axially, and the driving stroke of the axial driver is greater than or equal to the diameter of the grease outlet passage 23 or the oil distribution passage 32 .

[0124] In this embodiment, when the valve core 3 rotates to switch the outlet, the oil distribution channel 32 that does not need to discharge grease will be temporarily connected when passing through the corresponding grease outlet channel 23, resulting in grease leakage. In order to avoid such grease leakage, an axial driver can be provided so that when the valve core 3 rotates, the valve core 3 is temporarily driven to axially displace a certain amount to stagger the corresponding grease outlet channel 23, and the valve core 3 is driven to axially displace and reset after the valve core 3 rotates to a certain angle.

[0125] In some embodiments of the present invention, the axial drive includes a screw-nut mechanism, a crank-slider mechanism, or an electromagnetic drive mechanism.

[0126] The embodiment of the utility model provides a dispensing device, comprising the rotary dispensing valve and a controller as in the above embodiment. The controller is connected to the driving mechanism of the rotary dispensing valve to control the driving mechanism.

[0127] In this embodiment, when the rotary distribution valve is working, the controller is started, and the controller controls the driving mechanism to operate so that the valve core 3 of the rotary distribution valve switches between the working valve position and the rest valve position. The setting of the controller improves the automation of the rotary distribution valve, and does not require frequent manual adjustment.

[0128] In some embodiments of the present invention, the rotary distributing valve is provided with a metering device for detecting the flow rate of the grease.

[0129] In this embodiment, the metering device can be used to count the amount of fat discharged from any fat outlet 23. When the amount of fat discharged reaches the requirement, the controller can control the driving mechanism to switch the valve position through the feedback of the metering device, for example, switching the next fat outlet 23 to be discharged to work. This ensures the accurate oil delivery of the rotary dispensing valve.

[0130] In some embodiments of the present invention, the metering device is located on the pipeline in front of the fat inlet passage 21 of the valve seat 2 and / or on the pipeline behind the fat outlet passage 23 of the valve seat 2 .

[0131] In this embodiment, the metering device is arranged on the pipeline near the grease channel to facilitate the counting of the total flow, while the metering device is arranged on the grease outlet channel 23 to facilitate the accurate knowledge of the flow of each grease outlet channel 23, that is, to know the amount of grease flowing to the lubrication point. The combination of the two can facilitate fault diagnosis.

[0132] In some embodiments of the present invention, the controller can work independently, or an interface module can be provided to accept control of the control module of the system.

[0133] In this embodiment, since the controller works independently, a dispensing device is an independent lubrication device product. At the same time, the controller can also be connected to the system control module through the interface module to accept the overall control, so that the dispensing device can constitute a part of a super system, that is, a part of a larger lubrication system or other system.

[0134] like Fig.15 As shown, an embodiment of the utility model provides a centralized lubrication system, including a lubrication pump 40 and at least one distribution device as in the above embodiment.

[0135] In some embodiments of the present invention, Fig.15 and Fig.16 As shown, the centralized lubrication system also includes a control module to control the operation of the entire system, and the control module is connected to the controller of each distribution device.

[0136] In this embodiment, the centralized lubrication system is mainly used to automatically and centrally lubricate all friction pairs of the equipment, ensuring that all friction pairs can obtain the required appropriate amount of grease. The centralized lubrication system of this embodiment includes a mobile terminal 10, a control cabinet 20, a grease replenishment system unit S1 and multiple lubrication system units S2. Among them, the mobile terminal 10 can be a mobile phone or a laptop computer, etc., which is connected to the control cabinet 20 through wireless communication. The control cabinet 20 is the general control device for centralized processing of the entire centralized lubrication system, which can be connected to the grease replenishment controller 51 of each grease replenishment system unit S1 and the lubrication controller of each lubrication system unit S2, receive the signal feedback of the grease replenishment controller 51 and the lubrication controller, and control them to execute corresponding instructions. The control cabinet 20 can be connected to the grease replenishment controller 51 or the lubrication controller by wired mode, and can also be connected by wireless mode if the system distribution range is large. The lubrication system unit S2 is the execution unit of the centralized lubrication system, which includes a lubrication pump 40, a solenoid valve 42, multiple rotary distribution valves and accessories such as pipeline harnesses and connectors. The lubrication pump 40 includes a lubrication oil storage tank 43, a monitor, a plunger pump, a motor and other components. The lubrication grease in the lubrication oil tank 43 can be pumped out according to a set program and sent to the rotary distribution valve group 44 through a pipeline. After being distributed by the valve core 3 of the rotary distribution valve, the grease is sent to the corresponding lubrication point of the friction pair from the corresponding grease outlet channel 23. The rotary distribution valve group 44 is a structure composed of multiple rotary distribution valve groups 44. The specific structure of the rotary distribution valve is the same as that in the above embodiment and will not be repeated.

[0137] When the centralized lubrication system is working: the mobile terminal 10 can be used to set parameters and control the operation and stop of the entire centralized lubrication system, and the system operation status can be viewed in real time. The controller can control the operation and stop of the system through the lubrication controller of each lubrication system unit S2. Taking one of the lubrication system units S2 as an example, after receiving the instruction, the lubrication controller controls the lubrication pump 40 to start and run according to the set program. The lubrication pump 40 sends the grease through the main oil pipeline to the rotary distribution valve group 44. Fig.16As shown, after the grease enters through the grease inlet 21 of the first rotary distribution valve, it enters the grease inlet 21 of each subsequent rotary distribution valve in turn. The grease in the grease inlet 21 enters the sub-chamber 31 through the inlet on each valve core 3. As the lubrication controller controls the stepper motor 1 of the rotary distribution valve, the valve core 3 rotates the set angle, and the grease outlet 23 that needs to be discharged is connected with the sub-chamber 31 through the oil distribution channel 32. The grease smoothly enters the corresponding grease outlet 23, and then directly leads to the friction pair through the branch oil pipe to achieve lubrication of the friction pair. When the grease added to the friction pair reaches the set amount, the lubrication controller controls the stepper motor 1 to run, driving the valve core 3 to rotate a certain angle until the next grease outlet 23 that needs to be discharged is connected with the oil distribution channel 32, and the lubrication of each subsequent friction pair is completed in turn. After all friction pairs are filled, the stepper motor 1 rotates to a state where the oil distribution channel 32 is not connected with the grease outlet 23, thereby closing the grease outlet 23, and a lubrication cycle is completed. When the lubricating oil tank 43 of a lubricating system unit S2 is detected to be short of grease by the corresponding liquid level monitoring module 53, the signal is fed back to the control cabinet 20, and the control cabinet 20 can control the lubricating system unit S2 to stop, give instructions to the grease replenishing controller 51, control the grease replenishing system unit S1 to start, and the grease replenishing pump 30 pumps the grease in the grease replenishing oil barrel 52 out through the grease replenishing pipeline. The control cabinet 20 simultaneously controls the solenoid valve 42 of the corresponding lubricating system unit S2 that is short of grease to open, and the grease smoothly enters the lubricating oil tank 43 of the lubricating system unit S2. When it is full, the liquid level monitoring module 53 feeds back a full signal, and the control cabinet 20 controls the grease replenishing pump 30 to stop, closes the corresponding solenoid valve 42, and controls the lubricating system unit S2 to continue running.

[0138] In some embodiments of the present invention, Figure 3 As shown, the rotary distribution valve includes a valve seat 2 assembled from multiple pieces and a valve core 3 assembled from multiple sections. The joints are mechanically constructed and the interface has good sealing. The valve seat 2 can be rectangular and made of stainless steel. It has a cylindrical body 22 at both ends, and a fat inlet 21 and a corresponding outlet at both ends of the valve cavity 22 are radially connected from the lower end. A fat outlet 23 is provided on the valve seat 2 corresponding to each valve body unit. The fat outlet 23 leads to the valve cavity 22. Each fat outlet 23 is arranged at intervals along the axial direction and is located in the same plane. The optimal solution is as follows Figure 3 The valve core 3 is a cylindrical structure that matches the shape and size of the valve cavity 22. The inner axial hole is perforated to form a sub-cavity 31. The multi-component oil passages 32 are evenly spaced along the axial direction of the valve core 3. Each group of oil passages 32 is coplanar in the plane perpendicular to the axis of the valve core 3. Figure 4As shown, each group of oil passages 32 has four, and they are evenly distributed along the circumference of the valve core 3. The grease outlet passages 23 corresponding to each group of oil passages 32 are coplanar with each other. The oil passages 32 can be coaxially connected with the corresponding grease outlet passages 23 at a certain moment during the rotation process, so that the sub-cavity 31 is connected with the grease outlet passage 23. Among them, the outer peripheral surface of the valve core 3 and the inner peripheral surface of the valve cavity 22 are both precision ground to ensure the matching accuracy. The material of the valve core 3 can be stainless steel or other metals or non-metals with high hardness and strength. Fourth annular grooves are respectively provided on both sides of a group of oil passages 32 of each section of the valve core 3 to facilitate the installation of the sealing ring 4, so that there is at least one sealing ring 4 between any two groups of oil passages 32, thereby realizing the rotational seal between the outer peripheral surface of the valve core 3 and the inner peripheral surface of the valve cavity 22, so that the two adjacent grease outlet passages 23 arranged axially will not be connected. In order to achieve the sealing between the two ends of the valve core 3 and the two ends of the valve cavity 22 of the valve seat 2, a larger sealing ring 4 can be set at both ends of the valve cavity 22 for sealing to prevent the grease in the gap between the valve core 3 and the valve cavity 22 from leaking out from both ends. One end of the valve core 3 is also connected to the stepper motor 1 as a driving mechanism, and the valve core 3 can rotate under the drive of the stepper motor 1. The other end of the valve core 3 is provided with a plug 5 or a blind hole structure to prevent the grease from flowing out from the left side of the sub-cavity 31. The valve core 3 has a working valve position and a rest valve position when rotating in the valve cavity 22; in the working valve position, the grease inlet channel 21, the inlet, the sub-cavity 31, the oil distribution channel 32 and the grease outlet channel 23 are connected in sequence; in the rest valve position, the oil distribution channel 32 is staggered relative to the grease outlet channel 23 to close the oil distribution channel 32 and the grease outlet channel 23. The multi-component oil passages 32 are arranged at intervals along the axial direction on the valve core 3, and each group of oil passages 32 includes four branch oil passages 32, and the projections of the branch oil passages 32 on the plane perpendicular to the axis of the valve core 3 do not overlap. This staggered arrangement ensures that when one group of oil passages 32 is connected to a corresponding grease outlet 23, another group of staggered branch oil passages 32 is disconnected from the corresponding grease outlet, thereby avoiding the situation where multiple grease outlets 23 are greased at the same time. Figure 5 As shown, the connection between any two adjacent sections of the valve core 3 can be a connection structure in which the stoppers are butted together and the pins 6 are positioned and plugged in.

[0139] In some embodiments of the present invention, Figure 6 As shown, the difference between this embodiment and the previous embodiment is that the valve seat 2 adopts an integrated structure rather than a piece-assembly structure, while the valve core 3 adopts a segmented assembly structure.

[0140] In some embodiments of the present invention, Figure 7 As shown, the difference from the previous embodiment is that the valve core 3 adopts an integrated structure rather than a segmented splicing structure.

[0141] In some embodiments of the present invention, Figure 8 and Fig. 9As shown, the difference from the above embodiment is that, although the valve core sections are coaxially spliced, their internal sub-cavities 31 are not connected. In fact, in this embodiment, each valve seat 2 and each valve core section become a minimum working unit, that is, one valve seat 2 corresponds to one valve cavity 22, one valve core 3, one fat inlet channel 21 and one fat outlet channel 23, one first annular groove 34 and inlet, and one group of oil channels 32. Each minimum working unit can be physically coaxially spliced, but the oil circuits are not connected to each other, and are driven by the same stepping motor 1. As shown in FIG. Fig. 9 As shown, two adjacent valve cores 3 are plugged in and matched with each other using a hexagonal anti-rotation structure 37 .

[0142] In some embodiments of the present invention, Figure 2 As shown, the difference from the previous embodiment is that the fat inlet passage 21 of each valve seat 2 adopts a coaxial series structure, and the valve core 3 of each valve seat 2 adopts a parallel arrangement. Compared with the above embodiment, this embodiment is more compact and small, and the size of the valve core 3 is also significantly reduced, especially the axial size of the entire rotary distribution valve can be reduced. While reducing the area occupied by the system, it also has a certain effect of reducing manufacturing costs.

[0143] In some embodiments of the present invention, Figure 1 As shown, the difference from the previous embodiment is that one valve core 3 can be provided with multiple grease channels 23, and this embodiment provides four rows, so that one rotary distribution valve can be connected to multiple oil channels, thus enhancing the application range of the rotary distribution valve.

[0144] In some embodiments of the present invention, Fig.10 As shown, the difference from the above embodiment is that a group of oil passages 32 of the valve core 3 includes two, which are coaxially arranged with an included angle of 180 degrees.

[0145] In some embodiments of the present invention, Fig.11 As shown, the difference from the above embodiment is that the valve core 3 has six oil passages 32, which are evenly distributed around the circumference, and any two of them have an angle of 60 degrees. Compared with the previous embodiment, the advantage of this embodiment is that the valve core 3 can rotate a smaller angle to achieve connection with the grease outlet passage 23.

[0146] In some embodiments of the present invention, Fig.12 As shown, the difference from the above embodiment is that the valve cavity 22 is conical, the corresponding valve core 3 is also conical, the upper and lower surfaces of the valve seat 2 are flat, and the peripheral surface is spherical.

[0147] In some embodiments of the present invention, Fig.13 As shown, the difference from the previous embodiment is that the valve seat 2 is a rectangular block structure as a whole.

[0148] In some embodiments of the present invention, Fig.14 As shown, the difference between the above embodiments is that a permanent magnet 7 is provided on the outer peripheral surface of the valve core 3, and a Hall sensor 8 capable of detecting the permanent magnet 7 is correspondingly provided on the valve seat 2. When the permanent magnet 7 rotates with the valve core 3 to the sensing range of the Hall sensor 8, it can be detected by the Hall sensor 8 to determine the state of the valve core 3. Compared with the mechanical limit structure, the cooperation between the permanent magnet 7 and the corresponding Hall sensor 8 can be used not only to determine the zero point or starting point position of the valve core 3, but also to determine the rotation state of the valve core 3, so as to timely determine and eliminate faults.

[0149] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A rotary distributing valve, at least suitable for a lubrication system using grease as a lubricating medium, characterized in that: The invention comprises at least one valve unit, wherein the valve unit comprises: A valve seat, defining a valve cavity, wherein a first end and a second end of the valve cavity are opposite to each other in a first direction, at least one inlet is defined on a cavity wall of the first end, and at least one outlet is defined on a cavity wall of the second end and / or between the first end and the second end; A valve core is rotatably disposed in the valve cavity and defines at least one sub-cavity to facilitate switching of at least one of the sub-cavities between at least one of the inlets and at least one of the outlets when the valve core rotates; and an active end is formed, the active end is located at the first end of the valve cavity, and the active end is constructed to be directly or indirectly connected to a driving mechanism.

2. The rotary dispensing valve according to claim 1, characterized in that: The rotary dispensing valve further comprises: A sealing member is arranged between the valve seat and the valve core and is located at least between at least one of the inlets and at least one of the outlets.

3. The rotary dispensing valve according to claim 2, characterized in that: When there are at least two outlets, the seal is also located at least between at least two of the outlets.

4. The rotary dispensing valve according to claim 1, characterized in that: The valve seat is provided with at least one fat inlet channel and at least one fat outlet channel, one of the fat inlet channels is communicated with one of the inlets; one of the fat outlet channels is communicated with one of the outlets; the valve seat includes at least one valve cavity, each of which is provided with the valve core; the shape of the valve core is adapted to the shape of the valve cavity; the sub-cavity is located inside the valve core and is arranged along the axial direction of the valve core, the valve core also includes at least one oil distribution channel arranged radially inside the valve core and communicated with the sub-cavity, the sub-cavity has a sub-cavity inlet; the valve core has a working valve position and a rest valve position when rotating in the valve cavity; When the valve is in the working position, the grease inlet passage, the sub-chamber inlet, the sub-chamber, the oil distribution passage and the grease outlet passage are connected in sequence; When the valve is in the rest position, the oil distribution passage is offset relative to the grease outlet passage to close the oil distribution passage and the grease outlet passage.

5. The rotary dispensing valve according to claim 4, characterized in that: In one of the valve chambers, when the valve core is in the working valve position, one of the sub-chambers is connected to one of the grease outlet passages only through one of the oil distribution passages.

6. The rotary dispensing valve according to claim 5, characterized in that: In each valve chamber of a valve unit, each sub-chamber of the valve core is connected to only one grease outlet passage through one oil distribution passage at the same time.

7. The rotary dispensing valve according to claim 4, characterized in that: At least two oil distribution channels are arranged on the valve core, and at least two oil distribution channels are arranged at intervals along the circumference of the valve core.

8. The rotary dispensing valve according to claim 4, characterized in that: At least two oil distribution channels are arranged on the valve core, and at least two of the oil distribution channels are arranged at intervals along the axial direction of the valve core. There are at least two corresponding outlets on the valve cavity, and they correspond one to one with the oil distribution channels arranged at intervals along the axial direction.

9. The rotary dispensing valve according to claim 8, characterized in that: At least two groups of the oil distribution channels are arranged on the valve core at intervals along the axial direction, each group of the oil distribution channels includes at least two oil distribution channels, and the projections of the oil distribution channels on the plane perpendicular to the axis of the valve core do not overlap.

10. The rotary dispensing valve according to claim 8 or 9, characterized in that: Each of the grease outlet passages communicated with one of the valve chambers is coplanar.

11. The rotary dispensing valve according to claim 1, characterized in that: The valve core is formed by splicing a plurality of coaxial valve core sections, and each of the valve core sections is non-rotatably fitted.

12. The rotary dispensing valve according to claim 1 or 11, characterized in that: The valve seat is formed by splicing a plurality of valve body units, and the valve body units are detachably sealed and connected to each other.

13. The rotary dispensing valve according to claim 4, characterized in that: The fat inlet channel is coaxially arranged with the sub-cavity, and the sub-cavity inlet and the fat inlet channel are located at the second end.

14. The rotary dispensing valve according to claim 4, characterized in that: The valve cavity and the valve core are both cylindrical, the grease inlet channel is arranged on the valve seat along the radial direction of the valve cavity, the sub-cavity inlet is arranged along the radial direction of the valve core, the circumferential surface of the valve core corresponding to the sub-cavity inlet is provided with a first annular groove, and the sub-cavity inlet is arranged in the first annular groove.

15. The rotary dispensing valve according to claim 13 or 14, characterized in that: The sub-cavity has a sub-cavity outlet, which is located at the first end and arranged along the radial direction of the valve core. The circumferential surface of the valve core corresponding to the sub-cavity outlet is provided with a second annular groove, and the sub-cavity outlet is arranged in the second annular groove.

16. The rotary dispensing valve according to claim 1, characterized in that: One of the valve core and the valve seat is provided with a first limit portion, and the other is provided with a second limit portion. When the valve core is at the starting position of rotation relative to the valve seat, the first limit portion and the second limit portion are blocked and cooperated to determine the initial position of the valve core.

17. The rotary dispensing valve according to claim 16, characterized in that: One of the valve core and the valve seat is provided with an outwardly convex sliding block to form the first limiting portion, and the other is provided with an inwardly concave third annular groove, wherein a stop protrusion is provided in the third annular groove to form the second limiting portion.

18. The rotary dispensing valve according to claim 1, characterized in that: An induction body is provided on the outer peripheral surface of the valve core, and a sensor capable of detecting the induction body is correspondingly provided on the valve seat. When the induction body rotates with the valve core to the sensing range of the sensor, it can be detected by the sensor to determine the state of the valve core.

19. The rotary dispensing valve according to claim 18, characterized in that: The induction body is a permanent magnet, and the sensor is a Hall sensor.

20. The rotary dispensing valve according to claim 1, characterized in that: The driving mechanism or the valve core is provided with an angle sensor to detect the rotation angle of the valve core.

21. The rotary dispensing valve according to claim 1, characterized in that: A bearing is arranged between the valve core and the valve seat.

22. The rotary dispensing valve according to claim 1, characterized in that: The driving mechanism includes a stepping motor.

23. The rotary dispensing valve according to claim 4, characterized in that: The valve core is connected to an axial driver to drive the valve core to move axially, and the driving stroke of the axial driver is greater than or equal to the diameter of the grease outlet passage or the oil distribution passage.

24. The rotary dispensing valve according to claim 23, characterized in that: The axial drive comprises a screw nut mechanism, a crank slider mechanism or an electromagnetic drive mechanism.

25. A dispensing device, characterized in that: include: The rotary dispensing valve according to any one of claims 1 to 24; A controller is connected to the driving mechanism of the rotary dispensing valve to control the driving mechanism.

26. The dispensing device according to claim 25, characterized in that The rotary distributing valve is correspondingly provided with a metering device for detecting the flow rate of the grease.

27. The dispensing device according to claim 26, characterized in that The metering device is located on the pipeline before the grease inlet passage of the valve seat and / or on the pipeline after the grease outlet passage of the valve seat.

28. The dispensing device according to claim 27, characterized in that The controller can work independently, or can be provided with an interface module to accept control of the control module of the system.

29. A centralized lubrication system, characterized in that: The invention comprises a lubrication pump and a dispensing device according to any one of claims 25 to 28, wherein the number of the dispensing device is at least one.

30. The centralized lubrication system according to claim 29, characterized in that A control module is also included to control the operation of the entire system, and the control module is connected to the controllers of each dispensing device.

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