A plunger metering pump and glue filling equipment

Abstract

The present application discloses a plunger metering pump and glue filling equipment, which relates to the technical field of liquid metering devices. The plunger metering pump includes: a pump body, a plunger and an observation structure. A pump chamber and a lubrication chamber are provided in the pump body. The lubrication chamber is provided on one side of the pump chamber, and a first sealing assembly is provided between the lubrication chamber and the pump chamber. The lubrication chamber is used to fill a first lubricant. The plunger is provided in the pump body. The plunger can be movably provided in the lubrication chamber and the first sealing assembly, and is at least partially located in the pump chamber. The observation structure is connected to the lubrication chamber, and the observation structure is used to check the state change of the first lubricant in the lubrication chamber. The present application can timely prevent liquid leakage in the pump chamber and avoid affecting the stability of the pump body due to liquid leakage.

Description

Technical Field

[0001] The present application relates to the technical field of liquid metering devices, and in particular to a plunger metering pump and glue filling equipment. Background Art

[0002] A metering pump with a plunger, also known as a plunger metering pump, is a special metering device whose core working principle is to use the reciprocating motion of the plunger to achieve the suction and discharge of liquid. This pump has the characteristics of simple structure, high temperature and high pressure resistance, and its flow rate can be dynamically adjusted within the range of 0% to 100%, thereby meeting the needs of different application scenarios.

[0003] However, the performance of any equipment is closely related to its maintenance status and operating conditions. For plunger metering pumps, the sealing performance inside the pump body is particularly critical. Once the seal is poor, the liquid in the pump chamber may leak to the plunger or other internal transmission structures. This leakage will not only affect the metering accuracy of the pump, but may also cause corrosion, wear and even damage to internal parts. In the long run, it will not only affect the normal operation of the equipment, but may also increase maintenance costs and even shorten the service life of the equipment. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a plunger metering pump and a glue filling device, which can prevent liquid leakage in the pump chamber in time and avoid affecting the stability of the pump body due to liquid leakage.

[0005] In the first aspect, the present application provides a plunger metering pump, comprising: a pump body, a plunger and an observation structure, wherein a pump chamber and a lubrication chamber are provided in the pump body, the lubrication chamber is provided on one side of the pump chamber, and a first sealing assembly is provided between the lubrication chamber and the pump chamber, and the lubrication chamber is used to fill a first lubricant; the plunger is provided in the pump body, the plunger can be movably passed through the lubrication chamber and the first sealing assembly, and is at least partially located in the pump chamber; the observation structure is connected to the lubrication chamber, and the observation structure is used to check the state changes of the first lubricant in the lubrication chamber.

[0006] The plunger metering pump according to the embodiment of the first aspect of the present application has at least the following beneficial effects: the plunger can be movably inserted in the pump chamber, and when the plunger is compressed in the direction of the pump chamber, the liquid will be squeezed out of the pump chamber. When the first sealing assembly is not sealed well, the liquid in the pump chamber will flow into the lubrication chamber, causing the first lubricant in the lubrication chamber to change. The relevant operators can promptly discover this change in the first lubricant through the observation structure, thereby providing an intuitive and effective fault warning method, which can more accurately determine when the pump needs to be maintained and serviced. By connecting the observation structure to the lubrication chamber, liquid leakage in the pump chamber can be prevented in time, avoiding the stability of the pump body being affected by liquid leakage.

[0007] According to some embodiments of the first aspect of the present application, the observation structure includes an oil pot and a connecting pipe, the oil pot and the connecting pipe are arranged on the outside of the pump body, the oil pot is used to fill the first lubricant, and is connected to the lubrication chamber through the connecting pipe.

[0008] According to some embodiments of the first aspect of the present application, the oil can includes a transparent shell.

[0009] According to some embodiments of the first aspect of the present application, an oil filling hole is provided at the top of the oil pot, and the observation structure further includes an oil shielding cover, which is rotatably disposed on the top of the oil pot to cover the oil filling hole.

[0010] According to some embodiments of the first aspect of the present application, the first sealing assembly includes a plurality of sealing rings, and each of the sealing rings is made of a material with a different hardness.

[0011] According to some embodiments of the first aspect of the present application, a first annular protrusion is provided on the side of the sealing ring facing away from the plunger, and a second annular protrusion is provided on the side of the sealing ring close to the plunger, the first annular protrusion abuts against the inner wall of the pump body, and the second annular protrusion abuts against the outer wall of the plunger.

[0012] According to some embodiments of the first aspect of the present application, an annular placement groove is provided on the sealing ring, and an elastic member is provided in the placement groove, and the elastic member is used to provide an elastic force so that the first annular protrusion abuts against the inner wall of the pump body and the second annular protrusion abuts against the outer wall of the plunger.

[0013] According to some embodiments of the first aspect of the present application, the plunger metering pump further includes a sliding sleeve, the sliding sleeve is disposed in the lubrication chamber, the plunger is inserted through the sliding sleeve, and the sliding sleeve is provided with a guide channel for the first lubricant to flow.

[0014] According to some embodiments of the first aspect of the present application, a closed cavity is further provided in the pump body, wherein the closed cavity is located on a side of the lubrication chamber away from the pump chamber, a second sealing assembly is provided between the closed cavity and the lubrication chamber, the plunger passes through the second sealing assembly, a transmission assembly is provided in the closed cavity, one end of the plunger away from the pump chamber is located in the closed cavity and is connected to the transmission assembly, the transmission assembly is used to drive the plunger to move within the pump body, and the closed cavity is used to fill the second lubricant.

[0015] In a second aspect, the present application further provides a glue filling device, comprising a plunger metering pump as described in any one of the embodiments of the first aspect.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram of the structure of a plunger metering pump provided in some embodiments of the present application;

[0019] Figure 2 A side schematic diagram of a plunger metering pump provided in some embodiments of the present application;

[0020] Figure 3 For this application Figure 2 A schematic cross-sectional view of the section line AA;

[0021] Figure 4 For this application Figure 3 A partial enlarged schematic diagram of area B;

[0022] Figure 5 For this application Figure 3 A partial enlarged schematic diagram of area C;

[0023] Figure 6 A schematic diagram of the structure of a sliding sleeve provided in some embodiments of the present application.

[0024] The figures are as follows:

[0025] Pump body 100; pump chamber 110; first sealing assembly 120; sealing ring 121; first annular protrusion 122; second annular protrusion 123; lubrication chamber 130; sleeve 140; guide channel 141; second sealing assembly 150; closed cavity 160; plunger 210; transmission assembly 220; drive member 230; oil pot 310; transparent housing 311; connecting pipe 320; oil shielding cover 330. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0030] A metering pump with a plunger, also known as a plunger metering pump, is a special metering device whose core working principle is to use the reciprocating motion of the plunger to achieve the suction and discharge of liquid. This pump has the characteristics of simple structure, high temperature and high pressure resistance, and its flow rate can be dynamically adjusted within the range of 0% to 100%, thereby meeting the needs of different application scenarios.

[0031] However, the performance of any equipment is closely related to its maintenance status and operating conditions. For plunger metering pumps, the sealing performance inside the pump body is particularly critical. Once the seal is poor, the liquid in the pump chamber may leak to the plunger or other internal transmission structures. This leakage will not only affect the metering accuracy of the pump, but may also cause corrosion, wear and even damage to internal parts. In the long run, it will not only affect the normal operation of the equipment, but may also increase maintenance costs and even shorten the service life of the equipment.

[0032] Based on this, the present application provides a plunger metering pump and a glue filling device to solve the above-mentioned technical problems. The technical solutions provided by the present application are described in detail one by one below.

[0033] First, refer to Figures 1 to 4The present application provides a plunger metering pump, comprising: a pump body 100, a plunger 210 and an observation structure. A pump chamber 110 and a lubrication chamber 130 are provided in the pump body 100. The lubrication chamber 130 is provided on one side of the pump chamber 110, and a first sealing assembly 120 is provided between the lubrication chamber 130 and the pump chamber 110. The lubrication chamber 130 is used to fill a first lubricant. The plunger 210 is provided in the pump body 100. The plunger 210 can be movably passed through the lubrication chamber 130 and the first sealing assembly 120, and is at least partially located in the pump chamber 110. The observation structure is connected to the lubrication chamber 130, and the observation structure is used to view the state changes of the first lubricant in the lubrication chamber 130.

[0034] The plunger 210 can be movably inserted in the pump chamber 110. When the plunger 210 is compressed in the direction of the pump chamber 110, the liquid will be squeezed out of the pump chamber 110. When the first sealing assembly 120 is not sealed well, the liquid in the pump chamber 110 will flow into the lubrication chamber 130, causing the first lubricant in the lubrication chamber 130 to change. The relevant operators can promptly discover this change in the first lubricant through the observation structure, thereby providing an intuitive and effective fault warning method, which can more accurately determine when the pump needs to be maintained and serviced. By connecting the observation structure to the lubrication chamber 130, it is possible to prevent liquid leakage in the pump chamber 110 in a timely manner, and avoid affecting the stability of the operation of the pump body 100 due to liquid leakage.

[0035] Reference Figure 1 and Figure 3 It can be understood that the observation structure includes an oil pot 310 and a connecting pipe 320, and the oil pot 310 and the connecting pipe 320 are arranged on the outside of the pump body 100. The oil pot 310 is used to fill the first lubricant and is connected to the lubrication chamber 130 through the connecting pipe 320. The oil pot 310 is arranged on the outside of the pump body 100, so that the user can easily check the state of the first lubricant in the lubrication chamber 130 without disassembling the pump body 100, which simplifies the observation process and improves the maintainability of the equipment. Through the connecting pipe 320, the first lubricant in the oil pot 310 and the first lubricant in the lubrication chamber 130 can flow with each other, and the user can observe the state of the first lubricant from the oil pot 310 in real time, such as color, transparency, etc., to judge the sealing condition of the first sealing component 120.

[0036] It is understandable that the shell of the oil pot 310 is made of a transparent material. The transparent shell allows the user to intuitively observe the changes in the first lubricant in the oil pot 310 without opening or disassembling the oil pot 310. The transparent material of the oil pot 310 can be glass, which is not specifically limited here.

[0037] Reference Figure 1It is understood that the top of the oil pot 310 is provided with an oil filling hole (not shown in the figure), and the observation structure also includes an oil shielding cover 330, which can be rotatably arranged on the top of the oil pot 310 to cover the oil filling hole. The oil shielding cover 330 can tightly cover the oil filling hole, effectively preventing dust, impurities and pollutants in the external environment from entering the inside of the oil pot 310 through the oil filling hole, thereby ensuring the cleanliness of the first lubricant. In addition, when the first sealing component 120 is damaged, the liquid in the pump chamber 110 will penetrate into the lubrication chamber 130, so that the first lubricant penetrates impurities or affects the performance of the first lubricant. When the operator replaces the first sealing component 120, if the first lubricant is contaminated to a certain extent, it is necessary to discharge the original first lubricant at the same time, and then by rotating the oil shielding cover 330, the oil filling hole on the oil pot 310 is exposed, and the operator pours new first lubricant into the oil filling hole to ensure the normal operation of the pump body 100.

[0038] Reference Figure 5 It is understandable that the first sealing assembly 120 includes a plurality of sealing rings 121, and each sealing ring 121 is made of materials with different hardness. The use of sealing rings 121 with different hardness can adapt to the requirements for sealing performance in different working environments. Because the first lubricant in the observation chamber and the liquid composition in the pump chamber 110 are different, the use of sealing rings 121 with different hardness will have different sealing effects. The sealing ring 121 with higher hardness may be used to withstand greater pressure or prevent leakage, while the sealing ring 121 with lower hardness can provide a tighter fit at the connection, reduce gaps, and further improve the sealing performance. That is, by combining the use of sealing rings 121 with different hardness, a better sealing effect can be achieved in the same sealing assembly. In addition, when one of the sealing rings 121 is damaged, there are other sealing rings 121 as spares, thereby further improving the sealing performance. The technicians in the relevant technical field can select and adjust the hardness and quantity of the sealing ring 121 according to the specific application scenario and requirements, and this is not limited in this application.

[0039] Continue to refer to Figure 5 It can be understood that the sealing ring 121 is provided with a first annular protrusion 122 on the side away from the plunger 210, and a second annular protrusion 123 on the side close to the plunger 210. The first annular protrusion 122 abuts against the inner wall of the pump body 100, and the second annular protrusion 123 abuts against the outer wall of the plunger 210. The sealing ring 121 abuts against the inner wall of the pump body 100 through the first annular protrusion 122, and against the outer wall of the plunger 210 through the second annular protrusion 123, so as to improve the airtightness between the pump chamber 110 and the lubrication chamber 130.

[0040] Continue to refer to Figure 5It can be understood that an annular placement groove is provided on the sealing ring 121, and an elastic member (not shown in the figure) is provided in the placement groove. The elastic member is used to provide elastic force so that the first annular protrusion 122 abuts against the inner wall of the pump body 100 and the second annular protrusion 123 abuts against the outer wall of the plunger 210. The elastic member is arranged in the placement groove of the sealing ring 121, and the elastic force of the two sides of the sealing ring 121 to be stretched outward can be provided by the elastic member. The first annular protrusion 122 and the second annular protrusion 123 are respectively arranged on the inner and outer walls of the sealing ring 121. Through the cooperation of the elastic member, it is ensured that the sealing ring 121 has a closer contact with the inner wall of the pump body 100 and the outer wall of the plunger 210, and the sealing performance is effectively improved.

[0041] Reference Figure 4 and Figure 6 It can be understood that the pump plunger metering pump also includes a sleeve 140, which is arranged in the lubrication chamber 130, and the plunger 210 is passed through the sleeve 140. The sleeve 140 is provided with a guide channel 141 for the first lubricant to circulate. The sleeve 140 provides positioning and guiding functions for the plunger 210, which can ensure that the plunger 210 moves on a predetermined track, prevent it from deviating from the normal working position, and reduce the vibration and impact of the plunger 210 during movement. In addition, a guide channel 141 is also provided on the sleeve 140, and the first lubricant can flow evenly to both ends of the sleeve 140 through the guide channel 141, and the first lubricant can be more evenly distributed on the surface of the plunger 210 to ensure that it is fully lubricated. The guide channel 141 can be an opening torn on the sliding sleeve 140. Due to the setting of the guide channel 141, the sliding sleeve 140 can be directly unfolded when the sliding sleeve 140 is installed on the plunger 210, and the sliding sleeve 140 can be easily put on the plunger 210, which improves the convenience of installation.

[0042] Reference Figure 2 and Figure 3 It can be understood that a closed cavity 160 is further provided in the pump body 100, and the closed cavity 160 is located on the side of the lubrication chamber 130 away from the pump chamber 110, and a second sealing assembly 150 is provided between the closed cavity 160 and the lubrication chamber 130, and the plunger 210 passes through the second sealing assembly 150, and a transmission assembly 220 is provided in the closed cavity 160, and one end of the plunger 210 away from the pump chamber 110 is located in the closed cavity 160 and connected to the transmission assembly 220, and the transmission assembly 220 is used to drive the plunger 210 to move in the pump body 100, and the closed cavity 160 is used to fill the second lubricant. The transmission assembly 220 can be a screw transmission structure, a gear set transmission structure, a chain sprocket transmission structure, etc., which is not limited in this application.

[0043] A driving member 230 is provided at the top of the pump body 100. Through the combination of the transmission assembly 220 and the driving member 230, the stroke of the plunger 210 can be precisely controlled, and the flow rate of the pump can be adjusted more accurately to meet the needs of different application scenarios. The second lubricant in the closed cavity 160 can reduce the rolling resistance and sliding friction of the transmission assembly 220, optimize the transmission performance of the transmission assembly 220, and reduce the noise and heat generated by the friction of the transmission assembly 220, so that the pump body 100 works more smoothly. In addition, a second sealing assembly 150 is provided between the closed cavity 160 and the pump chamber 110 to prevent the liquid in the pump chamber 110 or the first lubricating liquid in the lubricating chamber 130 from flowing into the closed cavity 160, thereby affecting the operation of the transmission assembly 220, or preventing the second sealing assembly 150 in the closed cavity 160 from flowing into the pump chamber 110, resulting in the liquid in the pump chamber 110 being impure, or flowing into the lubricating chamber 130, resulting in the first lubricating liquid being contaminated, affecting the performance of the output liquid.

[0044] In addition, the first lubricant in the oil pot 310 can be selected to be a liquid that can react with the liquid in the pump chamber 110 and the second lubricant in the closed cavity 160. For example, when the first lubricant in the oil pot 310 contacts the liquid in the pump chamber 110, the first lubricant in the oil pot 310 changes to a first color; when the first lubricant in the oil pot 310 contacts the second lubricant in the closed cavity 160, the first lubricant in the oil pot 310 changes to a second color. When the color of the first lubricant changes to the first color, it is determined that the first sealing component 120 is damaged, and when the color of the first lubricant changes to the second color, it is determined that the second sealing component 150 is damaged.

[0045] In addition, it should be noted that the first lubricant in the oil pot 310 and the second lubricant in the closed cavity 160 can be the same lubricant.

[0046] It is understandable that the inlet end of the liquid outlet flow channel is connected to the top of the pump chamber 110. In the process of the plunger 210 moving forward to the pump chamber 110, if there is air in the pump chamber 110, due to the compressibility of the air, even if the plunger 210 completes its expected compression stroke, the amount of liquid ejected from the pump chamber 110 will be less than the specified value. The inlet end of the liquid outlet flow channel is connected to the top of the pump chamber 110. When the plunger 210 is pressed down, it can ensure that any air or bubbles accumulated at the top will be discharged preferentially before the liquid in the pump chamber 110 is completely pushed out. Therefore, when using the vertical metering pump for infusion, it is necessary to control the plunger 210 to reciprocate several times in the pump chamber 110 until all the gas in the pump chamber 110 is discharged from the liquid outlet flow channel. By preferentially discharging the air or bubbles in the pump chamber 110, the possibility of bubbles entering the output liquid can be effectively reduced, thereby improving the accuracy of liquid output metering, while eliminating the interference of bubbles on the work of the metering pump.

[0047] In the second aspect, the present application further provides a glue filling device, including the plunger metering pump of any one embodiment of the first aspect. The function and principle of the glue filling device of this embodiment are based on the above plunger metering pump, so the glue filling device of this embodiment has the same beneficial effects as the above plunger metering pump, and will not be repeated here to save space.

[0048] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A plunger metering pump, characterized in that: include: A pump body, wherein a pump chamber and a lubrication chamber are provided in the pump body, wherein the lubrication chamber is provided on one side of the pump chamber, and a first sealing assembly is provided between the lubrication chamber and the pump chamber, and the lubrication chamber is used to be filled with a first lubricant; A plunger, the plunger is movably disposed in the lubrication chamber and the first sealing assembly and is at least partially located in the pump chamber; An observation structure is communicated with the lubrication chamber, and the observation structure is used to check the state change of the first lubricant in the lubrication chamber.

2. The plunger metering pump according to claim 1, characterized in that: The observation structure includes an oil pot and a connecting pipe, wherein the oil pot and the connecting pipe are arranged on the outside of the pump body, the oil pot is used to fill the first lubricant, and is connected with the lubrication chamber through the connecting pipe.

3. The plunger metering pump according to claim 2, characterized in that: The oil can comprises a transparent shell.

4. The plunger metering pump according to claim 2, characterized in that: An oil filling hole is arranged on the top of the oil pot, and the observation structure further comprises an oil shielding cover, which is rotatably arranged on the top of the oil pot to cover the oil filling hole.

5. The plunger metering pump according to claim 1, characterized in that: The first sealing assembly includes a plurality of sealing rings, and each of the sealing rings is made of materials with different hardness.

6. The plunger metering pump according to claim 5, characterized in that: A first annular protrusion is arranged on the side of the sealing ring away from the plunger, and a second annular protrusion is arranged on the side of the sealing ring close to the plunger. The first annular protrusion abuts against the inner wall of the pump body, and the second annular protrusion abuts against the outer wall of the plunger.

7. The plunger metering pump according to claim 6, characterized in that: The sealing ring is provided with an annular placement groove, and an elastic member is provided in the placement groove. The elastic member is used to provide elastic force so that the first annular protrusion abuts against the inner wall of the pump body and the second annular protrusion abuts against the outer wall of the plunger.

8. The plunger metering pump according to claim 1, characterized in that: The plunger metering pump further comprises a sliding sleeve, wherein the sliding sleeve is arranged in the lubrication chamber, the plunger is passed through the sliding sleeve, and the sliding sleeve is provided with a guide channel for the first lubricant to flow.

9. The plunger metering pump according to claim 1, characterized in that: A closed cavity is also provided in the pump body, and the closed cavity is located on a side of the lubrication chamber away from the pump chamber. A second sealing assembly is provided between the closed cavity and the lubrication chamber, and the plunger passes through the second sealing assembly. A transmission assembly is provided in the closed cavity, and one end of the plunger away from the pump chamber is located in the closed cavity and connected to the transmission assembly. The transmission assembly is used to drive the plunger to move in the pump body, and the closed cavity is used to fill the second lubricant.

10. A glue filling device, characterized in that: It comprises a plunger metering pump as described in any one of claims 1 to 9.

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