Pressurized metered dose unit and pressurized metered dose dispenser

Abstract

The utility model discloses a kind of pressurized quantitative distribution unit and pressurized quantitative dispenser, with the advantage of simplifying structure, pressurized quantitative distribution unit includes shell, valve stem, piston, spring and plug assembly, shell is along its axial in and is equipped with sliding cavity and carry cavity, valve stem is installed in sliding cavity axially slidably, plug assembly is installed in the upper end of shell and is sealed to sliding cavity, valve stem is also set in plug assembly, first sealing element is equipped between valve stem and plug assembly, valve stem has a size and the aperture of sliding cavity compatible sliding head structure, sliding head structure separates sliding cavity into upper cavity and lower cavity, piston is installed in carry cavity axially slidably, spring is in lower cavity, spring is installed between valve stem and piston, spring always has the tendency of driving valve stem and piston away from each other, piston has the first position in carry cavity, so that carry cavity and upper cavity are communicated, piston also has the second position in carry cavity, so that upper cavity and lower cavity are communicated.

Description

Technical Field

[0001] This utility model relates to the field of dispensers, and more particularly to a pressurized quantitative dispensing unit and a pressurized quantitative dispenser. Background Technology

[0002] In industrial production, centralized lubrication of various lubrication points on machinery is required. This is achieved through a lubrication system that provides timed and quantitative lubrication. A pressurized metering distributor is typically installed at the system's connection point to dispense oil as needed, ensuring proper system operation. When the lubrication pump first starts operating, the pressurized metering distributor stores oil / grease in the lower reservoir. When the pump stops and the oil supply line is unloaded, the stored metered amount of grease transfers from the lower reservoir to the upper reservoir. The next time the pump operates, the distributor stores grease in the lower reservoir while simultaneously injecting oil / grease from the upper reservoir into the lubrication points. Existing pressurized metering distributors include a valve stem, sealed with a steel gasket and rectangular rubber ring, resulting in a complex structure and poor installation stability.

[0003] Therefore, there is an urgent need for a simplified pressurized metering unit and pressurized metering dispenser to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of this invention is to provide a pressurized quantitative dispensing unit with a simplified structure.

[0005] Another objective of this invention is to provide a pressurized dispensing device, which includes a pressurized dispensing unit that simplifies the structure.

[0006] To achieve the above objectives, the pressurized quantitative dispensing unit provided by this utility model includes a housing, a valve stem, a piston, a spring, and a plug assembly. The housing has a sliding cavity and a feed cavity along its axial direction. The valve stem is axially slidably mounted in the sliding cavity. The plug assembly is mounted on the upper end of the housing and seals the sliding cavity. The valve stem also passes through the plug assembly. A first sealing element is provided between the valve stem and the plug assembly. The valve stem has a sliding head structure whose size matches the orifice diameter of the sliding cavity. The sliding head structure divides the sliding cavity into an upper cavity and a lower cavity. The piston is axially slidably mounted in the feed cavity. The spring is located in the lower cavity and is mounted on the... Between the valve stem and the piston, the spring always has a tendency to drive the valve stem and the piston away from each other. The piston has a first position in the feed chamber that connects the feed chamber and the upper chamber. The piston also has a second position in the feed chamber that connects the upper chamber and the lower chamber. When liquid is injected into the feed chamber, the piston is pushed and slides to the first position. The liquid flows from the feed chamber to the upper chamber. The liquid pushes the valve stem down and slides, causing the sliding head structure to push the liquid out of the lower chamber. When the pressure is released in the feed chamber, the piston is pushed by the spring and slides to the second position. The spring also pushes the valve stem up. The sliding head structure pushes the liquid out of the upper chamber, causing the liquid to flow from the upper chamber to the lower chamber.

[0007] Preferably, the plug assembly has a mounting groove opening into the upper cavity, and a first seal is mounted in the mounting groove. The first seal is a Y-shaped sealing ring.

[0008] Preferably, the housing is further provided with a connecting channel, the lower end of which opens into the feed chamber and the upper end of which opens into the upper chamber. When the piston is in the first position, the feed chamber is connected to the upper chamber through the connecting channel, and the lower chamber is connected to the upper chamber through the connecting channel when the piston is in the second position.

[0009] Preferably, when the piston is in the first position, it moves upward past the lower end of the connecting channel to open the lower end of the connecting channel, so that the feed chamber is connected to the connecting channel.

[0010] Preferably, the piston is provided with a docking channel, the lower end of which opens to the side of the piston and the upper end of which opens to the top of the piston. The upper end of the piston is inserted into the lower cavity. When the piston is in the second position, it passes downward over the lower end of the connecting channel so that the lower cavity is connected to the connecting channel through the docking channel.

[0011] Preferably, a guide ring is installed in the feed cavity near the lower end of the connecting channel. A guide hole is formed in the center of the guide ring. The guide ring has multiple flow guide holes. An annular groove is provided on the outer side of the guide ring. The flow guide holes pass through the annular groove and the guide hole. The size of the piston is matched with the size of the guide hole. The piston is narrowed at the lower end opening of the docking channel.

[0012] Preferably, a second seal is installed in the feed cavity. The second seal is located between the inner wall of the feed cavity and the piston, and is positioned below the guide ring and close to the guide ring.

[0013] Preferably, the pressurized quantitative dispenser of this utility model further includes a fixing rod, which is inserted into the inlet cavity and locked to the housing. The fixing rod is provided with an infusion chamber, the top of which opens into the inlet cavity. The piston in the second position is inserted into the infusion chamber, and the piston in the first position is dislodged from the infusion chamber.

[0014] Preferably, the plug assembly includes a mounting base and an adjusting member. The mounting base is detachably mounted on the housing, and the adjusting member is detachably mounted on the mounting base and is axially adjustable. The adjusting member has an adjusting channel that is closed at the top and open at the bottom, and the valve stem passes through the adjusting channel.

[0015] To achieve the second objective mentioned above, the present invention also provides a pressurized dispensing device, which includes a base and at least one of the pressurized dispensing units described above.

[0016] Compared with the prior art, the pressurized quantitative dispensing unit provided by this utility model has a first sealing element between the valve stem and the plug assembly to seal the valve stem, which simplifies the structural form. Attached Figure Description

[0017] Figure 1 This is a perspective view of the pressurized quantitative dispenser of this utility model.

[0018] Figure 2 This is a side view of the pressurized quantitative dispenser of this utility model.

[0019] Figure 3 This utility model relates to a pressurized quantitative dispenser. Figure 2 The cross-sectional view obtained after cutting the middle AA line segment, at which point oil is injected into the injection chamber.

[0020] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of a pressurized metering dispenser, with the injection chamber in a depressurized state.

[0021] Figure 5 This is a front view of the pressurized quantitative dispenser of this utility model.

[0022] Figure 6 This utility model relates to a pressurized quantitative dispenser. Figure 5 The cross-sectional view obtained after cutting the middle BB line segment shows that the injection chamber is in a depressurized state.

[0023] Figure 7 This is a perspective view of the pressurized quantitative dispensing unit of this utility model when it is separated from the housing after the hidden plug assembly and fixing rod are installed.

[0024] Figure 8 This is a perspective view of the piston and guide ring of this utility model when they are separated. Detailed Implementation

[0025] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] This utility model discloses a pressurized quantitative dispensing unit. In the embodiments provided by this utility model, it is used to dispense oils, such as thin oils and greases. Of course, it can also be used to dispense other liquids, such as alcohol and chemical agents.

[0027] like Figures 1 to 7As shown, the pressurized quantitative dispensing unit 100 of this utility model includes a housing 10, a valve stem 20, a piston 30, a spring 40, and a plug assembly 50. The housing 10 has a sliding cavity 11 and a feed cavity 12 along its axial direction, with the sliding cavity 11 located above the feed cavity 12. The valve stem 20 is axially slidably mounted in the sliding cavity 11, and the plug assembly 50 is mounted on the upper end of the housing 10 and seals the sliding cavity 11. The valve stem 20 also passes through the plug assembly 50, and a first sealing element 60 is provided between the valve stem 20 and the plug assembly 50. The valve stem 20 has a sliding head structure 21 whose size is adapted to the aperture of the sliding cavity 11; that is, the sliding head structure 21 and the aperture size of the sliding cavity 11 are approximately equal. It is worth noting that a sealing ring, such as a sealing ring, can be installed on the sliding head structure 21 to achieve a seal. In this case, the diameter of the sealing ring is approximately equal to the aperture of the sliding cavity 11, and the sealing ring should be understood as part of the sliding head structure 21. The sliding head structure 21 divides the sliding cavity 11 into an upper cavity 111 and a lower cavity 112. The piston 30 is axially slidably mounted in the feed cavity 12. A spring 40 is disposed in the lower cavity 112 and is installed between the valve stem 20 and the piston 30. The spring 40 always has a tendency to drive the valve stem 20 and the piston 30 away from each other. The piston 30 has a first position in the feed cavity 12 that connects the feed cavity 12 and the upper cavity 111, and a second position in the feed cavity 12 that connects the upper cavity 111 and the lower cavity 112.

[0028] The piston 30 is pushed and slids to the first position in the infeed chamber 12 as liquid is injected. The liquid flows from the infeed chamber 12 to the upper chamber 111. The liquid pushes the valve rod 20 downward, causing the sliding head structure 21 to push the oil out of the lower chamber 112. At this time, the state is as follows: Figure 3 As shown. When the piston 30 is depressurized in the feed chamber 12, it is pushed by the spring 40 and slides to the second position. The spring 40 also pushes the valve stem 20 upward. The sliding head structure 21 pushes the liquid in the upper chamber 111 out, so that the liquid flows from the upper chamber 111 to the lower chamber 112. At this time, the state is as follows. Figure 4 As shown. In the pressurized quantitative dispensing unit 100 provided by this utility model, a first sealing element 60 is provided between the valve stem 20 and the plug assembly 50 to seal the valve stem 20, simplifying the structural form. It is worth noting that the volumes of the upper chamber 111 and the lower chamber 112 change as the valve stem 20 slides.

[0029] To improve the installation stability of the first seal 60, the plug assembly 50 has an installation groove 51 that opens into the upper cavity 111. The first seal 60 is installed in the installation groove 51 and is a Y-shaped sealing ring.

[0030] like Figures 1 to 4As shown, the housing 10 also includes a connecting channel 13. The lower end of the connecting channel 13 opens into the feed chamber 12, and the upper end opens into the upper chamber 111. When the piston 30 is in the first position, the feed chamber 12 is connected to the upper chamber 111 via the connecting channel 13. When the piston 30 is in the second position, the lower chamber 112 is connected to the upper chamber 111 via the connecting channel 13. The connecting channel 13 facilitates communication between the feed chamber 12 and the upper chamber 111, and also facilitates communication between the upper chamber 111 and the lower chamber 112.

[0031] like Figure 3 As shown, when the piston 30 is in the first position, it moves upward past the lower end of the connecting channel 13 to open the lower end of the connecting channel 13, so that the feed chamber 12 is connected to the connecting channel 13.

[0032] like Figures 1 to 6 As shown, the piston 30 is provided with a docking channel 31. The lower end of the docking channel 31 opens onto the side of the piston 30, and the upper end of the docking channel 31 opens onto the top side of the piston 30. The upper end of the piston 30 passes into the lower cavity 112. When the piston 30 is in the second position, it extends downward past the lower end of the connecting channel 13, so that the lower cavity 112 is connected to the connecting channel 13 through the docking channel 31, and then connected to the upper cavity 111.

[0033] like Figures 2 to 8 As shown, a guide ring 14 is installed in the feed cavity 12 near the lower end of the connecting channel 13. A guide hole 141 is formed in the center of the guide ring 14, and the guide ring 14 is provided with multiple guide holes 142. An annular groove 143 is provided on the outer surface of the guide ring 14. The guide holes 142 pass through the annular groove 143 and the guide hole 141. The size of the piston 30 is adapted to the size of the guide hole 141, that is, the size of the piston 30 and the guide hole 141 are approximately equal. The piston 30 is narrowed at the lower end opening of the docking channel 31, so that when the piston 30 is in the second position, the piston 30 will not block the liquid from flowing into the docking channel 31. The liquid in the upper cavity 111 and the connecting channel 13 can flow into the docking channel 31 through the guide holes 142 and finally flow into the lower cavity 112, as shown. Figure 4 As shown.

[0034] like Figures 2 to 7 As shown, a second seal 70 is installed in the feed cavity 12. The second seal 70 is located between the inner wall of the feed cavity 12 and the piston 30, and is positioned below and close to the guide ring 14. The second seal 70 provides a seal to the piston 30.

[0035] like Figures 1 to 6As shown, the pressurized quantitative dispensing unit 100 of this utility model also includes a fixing rod 80. The fixing rod 80 passes through the infeed cavity 12 and is locked to the housing 10. An infusion chamber 81 is provided inside the fixing rod 80, with its top opening into the infeed cavity 12. The piston 30 in the second position passes through the infusion chamber 81, and the piston 30 in the first position is disengaged from the infusion chamber 81. The fixing rod 80 facilitates the fixing of the pressurized quantitative dispensing unit 100.

[0036] like Figures 1 to 6 As shown, the plug assembly 50 includes a mounting base 52 and an adjusting member 53. The mounting base 52 is detachably mounted to the housing 10, and the adjusting member 53 is detachably mounted to the mounting base 52 and is axially adjustable. The adjusting member 53 has an adjusting channel 531 that is closed at the top and open at the bottom, and the valve stem 20 passes through the adjusting channel 531. By adjusting the adjusting member 53 axially, the stroke of the valve stem 20 can be adjusted, thereby adjusting the discharge volume.

[0037] like Figures 1 to 7 As shown, this utility model also provides a pressurized quantitative dispenser 1000, which includes several pressurized quantitative dispenser units 100 and a base 200, wherein the pressurized quantitative dispenser units 100 are mounted on the base 200. In the embodiment provided by this utility model, only one pressurized quantitative dispenser unit 100 is provided on the base 200, but in actual use, different numbers of pressurized quantitative dispenser units 100 can be provided as needed. The base 200 is provided with an injection chamber 201, which communicates with the infusion chamber 81. To facilitate drainage, a drainage hole 15 communicating with the lower chamber 112 is provided through the side of the housing 10.

[0038] The following is a brief introduction to the working process of the pressurized quantitative dispenser 1000 of this utility model: Oil is injected into the injection chamber 201, flowing into the delivery chamber 81. The oil pushes the piston 30 upward, moving it from the second position to the first position. The oil then flows into the connecting channel 13 and the upper chamber 111. Under the push of the oil flowing into the upper chamber 111, the valve stem 20 slides downward. The sliding head structure 21 pushes the oil in the lower chamber 112 to the drain hole 15, discharging the oil to the lubrication point. After the injection chamber 201 is depressurized, the piston 30 slides downward under the action of the spring 40, and the valve stem 20 slides upward, moving the piston 30 from the first position to the second position. The connecting channel 13 connects with the docking channel 31. The sliding head structure 21 pushes out the oil in the upper chamber 111. The oil flows successively through the connecting channel 13, the docking channel 31, and the lower chamber 112, causing the lower chamber 112 to automatically replenish with oil. This continuous cycle ensures that the oil is pumped out in an orderly manner, delivering it to the lubrication points as needed.

[0039] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A pressurized quantitative dispensing unit, characterized in that: The device includes a housing, a valve stem, a piston, a spring, and a plug assembly. The housing has a sliding cavity and a feed cavity along its axial direction. The valve stem is axially slidably mounted in the sliding cavity. The plug assembly is mounted on the upper end of the housing and seals the sliding cavity. The valve stem also passes through the plug assembly. A first sealing element is provided between the valve stem and the plug assembly. The valve stem has a sliding head structure whose size is adapted to the orifice diameter of the sliding cavity, dividing the sliding cavity into an upper cavity and a lower cavity. The piston is axially slidably mounted in the feed cavity. The spring is located in the lower cavity and is installed between the valve stem and the piston. The spring is designed to constantly drive the valve stem. The piston tends to move away from each other. The piston has a first position in the feed chamber that connects the feed chamber and the upper chamber. The piston also has a second position in the feed chamber that connects the upper chamber and the lower chamber. When liquid is injected into the feed chamber, the piston is pushed and slides to the first position. The liquid flows from the feed chamber to the upper chamber. The liquid pushes the valve stem downward, causing the sliding head structure to push the liquid out of the lower chamber. When the feed chamber is depressurized, the piston is pushed by the spring and slides to the second position. The spring also pushes the valve stem upward. The sliding head structure pushes the liquid out of the upper chamber, causing the liquid to flow from the upper chamber to the lower chamber.

2. The pressurized quantitative dispensing unit according to claim 1, characterized in that, The plug assembly has a mounting groove that opens into the upper cavity, and the first sealing element is installed in the mounting groove. The first sealing element is a Y-shaped sealing ring.

3. The pressurized quantitative dispensing unit according to claim 1, characterized in that, The housing is also provided with a connecting channel. The lower end of the connecting channel opens into the feed cavity, and the upper end of the connecting channel opens into the upper cavity. When the piston is in the first position, the feed cavity is connected to the upper cavity through the connecting channel. When the piston is in the second position, the lower cavity is connected to the upper cavity through the connecting channel.

4. The pressurized quantitative dispensing unit according to claim 3, characterized in that, When the piston is in the first position, it moves upward past the lower end of the connecting channel to open the lower end of the connecting channel, so that the feed chamber is connected to the connecting channel.

5. The pressurized quantitative dispensing unit according to claim 3, characterized in that, The piston is provided with a docking channel. The lower end of the docking channel opens to the side of the piston, and the upper end of the docking channel opens to the top of the piston. The upper end of the piston is inserted into the lower cavity. When the piston is in the second position, it passes downward over the lower end of the connecting channel so that the lower cavity is connected to the connecting channel through the docking channel.

6. The pressurized quantitative dispensing unit according to claim 5, characterized in that, A guide ring is installed near the lower end of the connecting channel in the input cavity. A guide hole is formed in the center of the guide ring. The guide ring has multiple flow guide holes. An annular groove is provided on the outer side of the guide ring. The flow guide holes pass through the annular groove and the guide hole. The size of the piston is adapted to the size of the guide hole. The piston is narrowed at the lower opening of the docking channel.

7. The pressurized quantitative dispensing unit according to claim 6, characterized in that, A second seal is installed in the feed cavity. The second seal is located between the inner wall of the feed cavity and the piston. The second seal is located below the guide ring and is positioned close to the guide ring.

8. The pressurized quantitative dispensing unit according to claim 1, characterized in that, It also includes a fixing rod, which is inserted into the inlet cavity and locked to the housing. The fixing rod has an infusion chamber, the top of which opens into the inlet cavity. The piston in the second position is inserted into the infusion chamber, and the piston in the first position is dislodged from the infusion chamber.

9. The pressurized quantitative dispensing unit according to claim 1, characterized in that, The plug assembly includes a mounting base and an adjusting component. The mounting base is detachably mounted on the housing, and the adjusting component is detachably mounted on the mounting base and is axially adjustable. The adjusting component has an adjusting channel that is closed at the top and open at the bottom, and the valve stem passes through the adjusting channel.

10. A pressurized dispensing device, characterized in that, It includes a seat and at least one pressurized dispensing unit as described in any one of claims 1-9.

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