Fluid distribution valve, distribution device and centralized lubrication system
By using a combined valve core in the distribution valve and using the combined action of the control cock and the metering cock, quantitative filling is achieved, which solves the problem of poor filling accuracy of the existing distribution valve, and improves the accuracy and user experience of grease filling.
Patent Information
- Application Number
- CN202420702596.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-04-08
AI Technical Summary
During the grease filling control, the existing distribution valve cannot directly control the filling amount, resulting in poor filling accuracy and prone to problems of adding more or less grease, affecting the user experience.
The combined valve core is adopted, including a control cock and a metering cock. By controlling the rotation switching of the cock and the rotational action of the metering cock, the quantitative filling of the metering indoor lubricant is achieved, ensuring that the quantitative filling of each filling is more accurate.
By using the volume of the second metering chamber as the unit of quantitative filling, quantitative filling of the lubrication point or intermediate device is realized, improving the control of the filling quantity accuracy of the dispensing valve and improving the user experience.
Smart Images
Figure CN222925291U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lubricant distribution, in particular to a fluid distribution valve, a distribution device and a centralized lubrication system. Background Art
[0002] At present, when using a distribution valve to control the filling of grease in a lubrication system, the distribution valve performs on-off control according to the control signals of control devices such as an integrated control module, a controller of a lubricating pump, and a host computer, in order to control the filling amount of grease. However, the existing distribution valve can only control the on-off of the oil circuit and cannot directly control the filling amount. It can only indirectly measure data such as filling pressure and time and control it through conversion. Under different working conditions, affected by factors such as the quality of grease, service life, motor conditions of the lubrication system, and debugging accuracy, there is a significant difference between the calculated filling amount and the actual filling amount, which leads to the problem of overfilling or underfilling of grease. Whether the grease is overfilled or underfilled, it will result in poor user feedback. For example, when overfilling grease, the consumption of grease is accelerated and the use cost increases; when underfilling grease, the lubrication effect at the lubrication points is poor, which easily leads to increased wear at the lubrication points. Summary of the Utility Model
[0003] In view of the above problems, the present utility model is proposed to provide a fluid distribution valve, a distribution device and a centralized lubrication system that can overcome or at least partially solve the above problems, and can solve the problem of poor lubrication filling accuracy of the existing distribution valve, so as to achieve the purpose of improving the user experience.
[0004] Specifically, the present utility model provides a fluid distribution valve, comprising:
[0005] A valve seat defining a lubricant inlet, a lubricant outlet and a valve cavity, the lubricant inlet communicating with the lubricant outlet through the valve cavity;
[0006] A valve core including a control plug and a metering plug, the control plug being rotatably disposed in the valve cavity and defining a sub-cavity therein; the metering plug being rotatably disposed in the sub-cavity to partition a first metering chamber and a second metering chamber in the sub-cavity; and
[0007] When the control plug rotates and switches to a state where the first metering chamber communicates with the lubricant inlet, the second metering chamber communicates with the lubricant outlet, so as to cause the lubricant entering the first metering chamber to press the metering plug, forcing the lubricant in the second metering chamber to be guided to the lubricant outlet.
[0008] Optionally, the rotation axes of the control plug and the metering plug coincide.
[0009] Optionally, the radial cross-section of the sub-chamber is crescent-shaped, and the rotation axis of the metering cock is adjacent to or at the center of the chord side of the sub-chamber.
[0010] Optionally, the sub-chamber has a first opening and a second opening. The first opening communicates with the first metering chamber, and the second opening communicates with the second metering chamber. The first opening and the second opening are respectively located at both ends of the arc side of the sub-chamber, so as to cause the second metering chamber to communicate with the lubricant outlet through the second opening when the first metering chamber communicates with the lubricant inlet through the first opening.
[0011] Optionally, a transverse portion extending along a radial direction is formed in the control cock to partition two crescent-shaped sub-chambers in the inner cavity of the control cock.
[0012] Optionally, the first openings of the two sub-chambers are respectively located on the radial two sides of the control cock.
[0013] Optionally, in the axial direction of the control cock, the first opening and the second opening are spaced apart.
[0014] Optionally, the metering cocks in the two sub-chambers are relatively fixed or relatively rotatably arranged.
[0015] Optionally, when the two metering cocks are relatively rotatably arranged, the first openings of the two sub-chambers are located on the same side of the control cock.
[0016] Optionally, the fluid distribution valve further includes:
[0017] A driving device, which is fixed on the valve seat and is in transmission connection with the valve seat to drive the valve seat to rotate in the valve cavity.
[0018] Specifically, the present invention further provides a dispensing device, including at least one fluid distribution valve as described in any one of the above items. Among them,
[0019] When there is only one fluid distribution valve, it is configured to switch the on-off of the channel between the pumping station and the lubrication point; or
[0020] When there are at least two fluid distribution valves, each fluid distribution valve is configured to connect to the pumping station together, partially sharedly or relatively independently.
[0021] Specifically, the present invention further provides a centralized lubrication system, including:
[0022] The above-mentioned dispensing device; and
[0023] A pumping station, connected to the distribution device, is configured to inject lubricant into lubrication points under the control of the distribution device.
[0024] In the present utility model, compared with the traditional integral valve core, the valve core in the present utility model at least includes a control cock and a metering cock, that is, the present utility model adopts a combined valve core, so that the control cock realizes the basic on-off switching action of the valve core. At the same time, in the sub-cavity of the control cock, the rotation action of the metering cock is used to inject lubricant into the metering chamber. In this way, at least the volume of the second metering chamber can be used as a unit of quantitative injection, realizing quantitative injection of lubricant into lubrication points or intermediate devices. Instead of the traditional indirect quantification method through on-off control and flow conversion, the present utility model at least performs cumulative quantitative control based on the volume of the second metering chamber, ensuring that the quantitative injection of lubricant each time is more accurate, thereby improving the control of the injection volume accuracy of the distribution valve, making it easier for users to achieve the user experience of "what you think is what you get" during injection, and thus making the user experience better.
[0025] From the following detailed description of specific embodiments of the present utility model in conjunction with the accompanying drawings, those skilled in the art will become more clear about the above and other objects, advantages and features of the present utility model. Description of the Drawings
[0026] Some specific embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings in an exemplary but non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0027] Figure 1 is a schematic structural diagram of a fluid distribution valve according to an embodiment of the present utility model;
[0028] Figure 2 is a schematic structural diagram of a fluid distribution valve according to an embodiment of the present utility model under the first working condition;
[0029] Figure 3 is a schematic structural diagram of a fluid distribution valve according to an embodiment of the present utility model under the second working condition;
[0030] Figure 4 is a schematic cross-sectional view of the lubricant inlet of a fluid distribution valve according to a second embodiment of the present utility model under the first working condition;
[0031] Figure 5 is a schematic cross-sectional view of the lubricant outlet of a fluid distribution valve according to a second embodiment of the present utility model under the first working condition;
[0032] Figure 6It is a schematic structural diagram of the fluid distribution valve according to the third embodiment of the present utility model under the first working condition. Detailed implementation manners
[0033] The following will refer to Figures 1 to 6 to describe the fluid distribution valve of the embodiments of the present utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, including one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.
[0034] Unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. Those 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 specific circumstances.
[0035] 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 additional features therebetween. That is, in the description of this embodiment, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" or "below" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.
[0036] In the description of this embodiment, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0037] Figure 1 is a schematic structural diagram of a fluid distribution valve according to an embodiment of the present utility model, as Figure 1 shown, and with reference to Figure 2 and Figure 3 An embodiment of the present utility model provides a fluid distribution valve, including a valve seat 100 and a valve core 200. The valve seat 100 defines a lubricant inlet 110, a lubricant outlet 120, and a valve cavity 130. The lubricant inlet 110 communicates with the lubricant outlet 120 through the valve cavity 130. The valve core 200 includes a control plug 210 and a metering plug 220. The control plug 210 is rotatably arranged in the valve cavity 130, and a sub-cavity 230 is defined in the control plug 210. The metering plug 220 is rotatably arranged in the sub-cavity 230 to partition a first metering chamber 231a and a second metering chamber 232a in the sub-cavity 230. When the control plug 210 rotates and switches to a state where the first metering chamber 231a communicates with the lubricant inlet 110, the second metering chamber 232a communicates with the lubricant outlet 120, so as to cause the lubricant entering the first metering chamber 231a to press the metering plug 220, forcing the lubricant in the second metering chamber 232a to be guided to the lubricant outlet 120.
[0038] Compared with the traditional integral valve core 200, the valve core 200 in the present utility model at least includes a control plug 210 and a metering plug 220, that is, the present utility model adopts a combined valve core 200, so that the control plug 210 realizes the basic on-off switching action of the valve core 200. At the same time, in the sub-chamber 230 of the control plug 210, the rotation action of the metering plug 220 is used to fill the lubricant in the metering chamber. In this way, at least the volume of the second metering chamber 232a can be used as a unit of quantitative filling, realizing the quantitative filling of lubricant to the lubrication point or the intermediate device, changing the traditional indirect quantification method through on-off control and flow conversion. The present utility model at least performs cumulative quantitative control based on the volume of the second metering chamber 232a, ensuring that the quantitative filling of lubricant each time is more accurate, thereby improving the control of the filling amount accuracy of the distribution valve, making it easier for users to achieve the user experience of "what you think is what you get" during filling, and thus making the user experience better.
[0039] As Figure 2 shown, a structural schematic diagram of an embodiment of the present utility model under the first working condition is shown. In terms of the direction shown in Figure 2 , the control plug 210 is at the position corresponding to the first working condition in the valve chamber 130 at this time, so that the first metering chamber 231a on the left side of the metering plug 220 is communicated with the lubricant inlet 110, and the second metering chamber 232a on the right side of the metering piston is communicated with the lubricant outlet 120. After the lubricant (including lubricating oil and grease) enters the first metering chamber 231a through the lubricant inlet 110, the pressure of the lubricant in the first metering chamber 231a increases, pressing the metering plug 220 to swing to the right, and then pressing the lubricant in the second metering chamber 232a, so that the lubricant is discharged from the lubricant outlet 120, realizing a quantitative filling of lubricant once.
[0040] In the preferred embodiment of this embodiment, as Figure 3 described, when the valve core 200 is in the second working condition, the second metering chamber 232a is communicated with the lubricant inlet 110, and the first metering chamber 231a is communicated with the lubricant outlet 120. In this way, after the lubricant enters the second metering chamber 232a from the lubricant inlet 110, the space of the second metering chamber 232a will gradually expand, so that the lubricant in the first metering chamber 231a is pressed and discharged from the lubricant outlet 120.
[0041] Of course, when the valve core 200 switches between the first working condition and the second working condition, as Figure 2 and Figure 3 shown, it is completed in a way of rotating 180°, that is, from Figure 2At the position shown, when rotated 180° clockwise or counterclockwise, the valve core 200 rotates from the first working condition to the second working condition. This way of reciprocating rotation to switch between the first working condition and the second working condition can achieve continuous quantitative filling. For example:
[0042] Assume that the maximum capacity of both the first metering chamber 231a and the second metering chamber 232a is 5 ml. Then, in the case of needing to fill 10 ml of lubricant to a lubrication point or an intermediate device, it is necessary to first follow the Figure 2 shown first working condition. In the first working condition state of the valve core 200, 5 ml of lubricant is filled to the lubrication point or the intermediate device. Then the valve core 200 rotates 180°, so that the valve core 200 comes to the second working condition, and the lubricant is filled from the first metering chamber 231a to the target lubrication point or the intermediate device, completing a total of 10 ml of lubricant filling operation. During the rotation of the valve core 200, the control cock 210 blocks the channel between the lubricant inlet 110 and the lubricant outlet 120, so that the two are disconnected, thereby ensuring the filling accuracy from another aspect. At the same time, in order to ensure the filling accuracy, the time when the valve core 200 maintains any working condition is greater than the maximum time for the metering cock 220 to swing in the control cock 210, so that the lubricant in the corresponding metering chamber is discharged completely.
[0043] In a preferred embodiment of the present invention, as Figure 2 and Figure 3 shown, a transverse portion 240 extending along a chord line is formed in the control cock 210. The chord line is on the side of the center of the control cock 210, so as to separate a major arc segment and a major arc circular cavity defined by the chord line, and a minor arc segment and a minor arc circular cavity defined by the chord line in the inner cavity of the control cock 210. Among them, both the major arc circular cavity and the minor arc circular cavity are chord-shaped sub-chambers 230. And the minor arc circular cavity can be a cavity, or can be filled with fluid, solid or a solid structure integrated with the control cock 210. The metering cock 220 is rotatably arranged in the major arc circular cavity, so that both the first metering chamber 231a and the second metering chamber 232a are in the major arc circular cavity.
[0044] In a preferred embodiment of the present invention, as Figure 2 and Figure 3As shown, the rotation axes of the control cock 210 and the metering cock 220 coincide. This is to facilitate the realization of the sealing surface between the control cock 210 and the metering cock 220. That is, by arranging the control cock 210 and the metering cock 220 with the same rotation axis, the inner wall surface of the control cock 210 and the arc surface of the metering cock 220 can be sealed and fitted in a matching manner, obtaining a metering cock 220 arc circumferential surface that is convenient for processing and has a reliable seal. At the same time, the inner wall surface of the control cock 210 can also adopt a circular arc surface. Of course, under the condition of sufficient processing conditions, technological conditions, etc., it can also be considered to set the inner wall surface of the control cock 210 into an elliptical arc shape, a gradually changing arc shape, or a smooth curve shape, and by using the corresponding setting method of the metering cock 220, make the rotation axes of the metering cock 220 and the control cock 210 staggered. And this kind of staggering may not only be a parallel stagger, but also a spatial stagger, a spatial intersection, etc.
[0045] In a preferred embodiment of the present invention, as Figure 2 and Figure 3 shown, the radial cross-section of the sub-chamber 230 is in a crescent shape, and the rotation axis of the metering cock 220 is close to the center of the chord side of the sub-chamber 230. When the rotation axis of the metering cock 220 is close to the transverse portion 240 (possibly the transverse portion 240 is only the inner cavity wall of the control cock 210), making the distance between the rotating end of the metering cock 220 and the transverse portion 240 small enough can reduce the sealing difficulty between the metering cock 220 and the control cock 210. Even when the lubricant is grease, this gap can be ignored. Of course, in order to further reduce the sealing difficulty between the metering cock 220 and the control cock 210, the rotating end of the metering cock 220 can also be directly integrated on the transverse portion 240. Moreover, in the axial direction of the sub-chamber 230, the rotating end of the metering cock 220 does not adopt a shaft or sleeve that is as long as the axial length of the sub-chamber 230, but adopts one or more spaced short shafts and / or short sleeves to further ensure the sealing performance of the cooperation between the metering cock 220 and the control cock 210.
[0046] In a preferred embodiment of the present invention, as Figure 2 shown, the sub-chamber 230 has a first opening 233a and a second opening 234a. The first opening 233a communicates with the first metering chamber 231a, and the second opening 234a communicates with the second metering chamber 232a. And the first opening 233a and the second opening 234a are respectively located at both ends of the arc side of the sub-chamber 230, so as to promote that when the first metering chamber 231a communicates with the lubricant inlet 110 through the first opening 233a, the second metering chamber 232a communicates with the lubricant outlet 120 through the second opening 234a. Correspondingly, as Figure 3As shown, when the second metering chamber 232a is connected to the lubricant inlet 110 through the second opening 234a, the first metering chamber 231a will be connected to the lubricant inlet 110 through the first opening 233a. In this preferred embodiment, a structural form is proposed in which the first opening 233a and the second opening 234a provided on the sub-chamber 230 are respectively used to conduct the lubricant inlet 110 and the lubricant outlet 120, which is also one of the preferred embodiments. Of course, in the face of different requirements such as lubricant pressure, explosion protection, and corrosion resistance, as the wall thickness of the control cock 210 increases, the first opening 233a and the second opening 234a may also be replaced by channels, but the achieved purpose is similar; similarly, with the deformation of the structure, when each structure of the valve core 200 is used and designed in a large volume, the connection methods on the integral structures such as openings and channels are no longer applicable, and connection pipes, hoses, etc. may be selected, that is, the valve core 200 will appear in the form of a combined bracket, assembly, etc.
[0047] In another embodiment of the present invention, as Figure 4 shown, a transverse portion 240 extending along a radial direction is formed in the control cock 210 to separate two semi-circular sub-chambers 230 in the inner cavity of the control cock 210. That is, after the transverse portion 240 extends along the axial direction passing through the axis of the control cock 210, two sub-chambers 230 will be obtained in the control cock 210; correspondingly, two metering cocks 220 can be arranged in the control cock 210, so that the inner cavity volume of the control cock 210 is fully and effectively utilized, and at the same time, the single control capacity of the fluid distribution valve is increased, providing the possibility for realizing large-flow filling, dual-line control, etc.
[0048] In another embodiment of the present invention, in the axial direction of the control cock 210, the first opening 233b and the second opening 234b are spaced apart. Different from Figure 2 and Figure 3 the structural form in which the first opening 233a and the second opening 234a shown are flush in the axial direction of the control cock 210, this arrangement form staggered in the axial direction can make the arrangement of the lubricant inlet 110 and the lubricant outlet 120 more diversified. For example, a plurality of first openings 233b or a plurality of second openings 234b can be arranged in the axial direction of the control cock 210, and in a one-to-one or one-to-many manner, they are corresponding to the lubricant inlet 110 and the lubricant outlet 120, thereby improving the filling efficiency.
[0049] In another embodiment of the present invention, as Figure 4 and Figure 5As shown, the metering cocks 220 in the two sub-chambers 230 are relatively fixed. That is, after two symmetric and equal sub-chambers 230 are partitioned by a transverse portion 240 in the control cock 210, the metering cocks 220 in the two sub-chambers 230 are relatively fixed. The way of this relative fixation can be a fixed connection of a split structure or an integral structure. After the two metering cocks 220 are relatively fixed, their movements are synchronous. That is:
[0050] In the case where the valve core 200 is in the first working condition, taking Figure 4 the orientation shown in the figure as an example, the first metering chamber 231b on the left side of the lower sub-chamber 230 and the first metering chamber 231b on the right side of the upper sub-chamber 230 are joined together through the first opening 233b and then connected to the lubricant inlet 110 below; at the same time, taking Figure 5 the orientation shown in the figure as an example, the second metering chamber 232b on the right side of the lower sub-chamber 230 and the first metering chamber 231b on the left side of the upper sub-chamber 230 are joined together through the second opening 234b and then connected to the lubricant outlet 120 above.
[0051] After the valve core 200 rotates 180° to reach the second working condition, at this time, the first opening 233b and the second opening 234b change positions, that is, the first opening 233b is connected to the lubricant outlet 120, and the second opening 234b is connected to the lubricant inlet 110.
[0052] It should be noted that as Figure 4 and Figure 5 shown, the first opening 233b and the second opening 234b are axially offset from each other in the control cock 210 to obtain a connected state. However, this opening layout method is not the only one. For example, after corresponding one-way valves are provided on the lubricant inlet 110 and the lubricant outlet 120 on the valve seat 100, the first opening 233b and the second opening 234b may also be coplanar.
[0053] In another embodiment of the present invention, as Figure 6 shown, the metering cocks 220 in the two sub-chambers 230 are relatively rotatably arranged. As mentioned above, in the control cock 210, by making full use of the inner cavity space, the two metering cocks 220 respectively control the first metering chamber 231b and the second metering chamber 232b in different sub-chambers 230 to achieve metering control of a large flow rate.
[0054] In another embodiment of the present invention, as Figure 6As shown, when the two metering cocks 220 are relatively rotatably arranged, the first openings 233c of the two sub-chambers 230 are on the same side of the control cock 210. Correspondingly, the second openings 234c of the two sub-chambers 230 can also be on the same side, and the first openings 233c and the second openings 234c are symmetrically distributed on both radial sides of the valve chamber 130. Such forms of the first openings 233c and the second openings 234c make the processing of the control cock 210 more convenient and easier to control the processing accuracy.
[0055] In another embodiment of the present invention, the fluid distribution valve further includes a driving device 300, which is fixed on the valve seat 100 and is in transmission connection with the valve seat 100 to drive the valve seat 100 to rotate in the valve chamber 130. Preferably, the driving device 300 can adopt high-precision motors such as stepping motors and servo motors to achieve precise control of the rotation angle of the valve core 200, and further improve the accuracy of quantitative filling. As an optimized method, on the basis of this high-precision motor, some magnetic induction components, such as Hall sensors and permanent magnets, can also be correspondingly arranged on the valve core 200 and the valve seat 100 to facilitate knowing the rotation posture and working conditions of the valve core 200 in the valve seat 100.
[0056] In another embodiment of the present invention, a distribution device is further provided. The distribution device includes at least one of the above-mentioned fluid distribution valves. Among them, when there is only one fluid distribution valve, it is configured to switch the on-off of the channel between the pumping station and the lubrication point. When controlling the on-off of lubricant filling to the lubrication point, the fluid distribution valve can use direct control or indirect control. Among them, direct control means directly controlling the filling of lubricant to the lubrication point by means of the fluid distribution valve conducting and cutting off the channel; indirect control means that there are intermediate devices, such as another metering valve, another distribution valve, a reversing valve, etc. between the fluid distribution valve and the lubrication point, and the fluid distribution valve is used as the control of the lubricant source, and the specific quantitative distribution to each lubrication point is completed by the intermediate device. As an alternative embodiment, when there are at least two fluid distribution valves, each fluid distribution valve is configured to connect to the pumping station together, partially sharedly or relatively independently.
[0057] In another embodiment of the present utility model, a centralized lubrication system is further provided. The centralized lubrication system includes the above-mentioned distribution device and a pumping station. The pumping station is connected to the distribution device to inject lubricant into lubrication points under the control of the distribution device. During use, the pumping station starts according to the response timing (including set time and set conditions) set by the program, sends lubricant at a specified pressure to one or more or all of the distribution devices, and then under the distribution of the distribution device, the lubricant is directly injected into the specified lubrication points or indirectly injected into the specified lubrication points after being distributed by intermediate equipment, realizing centralized lubrication of each lubrication point.
[0058] Up to this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present utility model have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present utility model can still be directly determined or derived based on the content disclosed in the present utility model without departing from the spirit and scope of the present utility model. Therefore, the scope of the present utility model should be understood and determined to cover all these other variations or modifications.
Claims
1. A fluid dispensing valve, wherein: include: A valve seat, defining a lubricant inlet, a lubricant outlet and a valve cavity, wherein the lubricant inlet is connected to the lubricant outlet via the valve cavity; The valve core comprises a control cock and a metering cock, wherein the control cock is rotatably disposed in the valve cavity and defines a sub-cavity in the control cock; the metering cock is rotatably disposed in the sub-cavity to separate a first metering chamber and a second metering chamber in the sub-cavity; And when the control plug is rotated and switched to the point where the first metering chamber is connected to the lubricant inlet, the second metering chamber is connected to the lubricant outlet, so that the lubricant entering the first metering chamber presses the metering plug, forcing the lubricant in the second metering chamber to be guided to the lubricant outlet.
2. The fluid dispensing valve according to claim 1, wherein: The rotation axis of the control cock and the rotation axis of the metering cock coincide.
3. The fluid dispensing valve according to claim 2, wherein: The radial cross section of the sub-cavity is in a crescent shape, and the rotation axis of the metering cock is adjacent to or located at the center of the chord side of the sub-cavity.
4. The fluid dispensing valve according to claim 3, wherein: The sub-cavity has a first opening and a second opening, the first opening is communicated with the first metering chamber, the second opening is communicated with the second metering chamber, and the first opening and the second opening are respectively located at two ends of the arc side of the sub-cavity, so that when the first metering chamber is connected to the lubricant inlet via the first opening, the second metering chamber is connected to the lubricant outlet via the second opening.
5. The fluid dispensing valve according to claim 4, wherein: A transverse section extending in a radial direction is formed in the control cock to separate two semi-lunar sub-cavities in the inner cavity of the control cock.
6. The fluid dispensing valve according to claim 5, wherein: The first openings of the two sub-cavities are respectively located on two radial sides of the control cock.
7. The fluid dispensing valve according to claim 6, wherein: The first opening and the second opening are spaced apart from each other in the axial direction of the control cock.
8. The fluid dispensing valve according to claim 5, wherein: The metering cocks in the two sub-cavities are relatively fixed or relatively rotatable.
9. The fluid dispensing valve according to claim 8, wherein: When the two metering cocks are arranged to rotate relative to each other, the first openings of the two sub-chambers are located on the same side of the control cock.
10. The fluid dispensing valve according to claim 1, wherein: The fluid distributing valve further comprises: a driving device, which is fixed on the valve seat and is drivingly connected with the valve seat to drive the valve seat to rotate in the valve cavity.
11. A dispensing device, comprising at least one fluid dispensing valve as claimed in any one of claims 1 to 10, wherein: When there is only one fluid distribution valve, it is configured to switch the channel between the pump station and the lubrication point; or when there are at least two fluid distribution valves, each fluid distribution valve is configured to be connected to the pump station in common, partially in common, or relatively independently.
12. A centralized lubrication system, wherein: include: The dispensing device according to claim 11; A pump station is connected to the distribution device to add lubricant to the lubrication points under the control of the distribution device.