Device for automatically lubricating and cleaning throat of plunger pump

Abstract

The utility model discloses a device for automatically lubricating and cleaning a throat part of a plunger pump, which relates to the technical field of automobile manufacturing and aims to solve the problem that an oil cup cannot realize automatic cycle operation, the device comprises the oil cup arranged at the throat part of the plunger pump, a plunger rod of the plunger pump moves up and down along the axial direction of the oil cup, and the plunger rod is connected with a driving device. The driving device is in signal connection with the controller, an oil outlet of the oil cup is connected with an oil inlet of the oil tank, an inner cavity of the hydraulic cylinder is provided with a hydraulic rod which ascends and descends in the axial direction of the hydraulic cylinder, an oil inlet of the hydraulic cylinder is connected with an oil outlet of the oil tank, an oil outlet of the hydraulic cylinder is connected with an oil inlet of the oil cup, and the oil inlet and the oil outlet of the hydraulic cylinder are each provided with a one-way valve. Adjusting long holes are formed in the two ends of the swing rod, the plunger rod and the hydraulic rod are movably connected with the swing rod through corresponding connecting assemblies respectively, the connecting assemblies are movably arranged in the adjusting long holes, the swing rod is hinged to a base of the driving device through a hinge, and the filtering devices are arranged at an oil inlet and an oil outlet of the oil tank respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, and more specifically, to a device for automatically lubricating and cleaning the throat of a plunger pump. Background Art

[0002] The application of adhesive sealants in the automotive field is becoming more and more extensive. The glue application system is divided into three major parts: feeding, metering, and gun valve according to the process. Among them, a glue pump is required in the feeding link. A lubricating oil cup is installed at the throat of the glue pump, and lubricating oil is placed in the oil cup to provide lubrication for the friction pair composed of the throat sealing ring and the piston rod.

[0003] However, with the up and down movement of the piston rod, part of the lubricating oil will enter the pump body along with the piston rod, continuously reducing the lubricating oil in the oil cup. At the same time, due to the increased wear between the friction pairs, the glue leaks out of the pump body through the throat and flows into the oil cup, contaminating the lubricating oil. The lack and contamination of lubricating oil will directly affect the lubrication function of the throat. Therefore, it is necessary for a special person on site to observe the state of the oil cup at all times and take measures.

[0004] Therefore, how to solve the problem that the oil cup cannot work automatically in a cycle is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a device for automatically lubricating and cleaning the throat of a plunger pump, so that the oil cup can work automatically in a cycle to achieve the functions of automatic lubrication and cleaning of the throat, thereby reducing labor costs.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for automatically lubricating and cleaning the throat of a plunger pump, comprising:

[0008] An oil cup is arranged at the throat of the plunger pump. The plunger rod of the plunger pump moves up and down along the axis of the oil cup. The plunger rod is connected to a driving device, and the driving device is signal-connected to a controller. The oil outlet of the oil cup is connected to the oil inlet of a fuel tank;

[0009] A hydraulic cylinder, the inner cavity of the hydraulic cylinder is provided with a hydraulic rod that moves up and down along the axis of the hydraulic cylinder. The oil inlet of the hydraulic cylinder is connected to the oil outlet of the fuel tank, and the oil outlet of the hydraulic cylinder is connected to the oil inlet of the oil cup. One-way valves are provided at both the oil inlet and the oil outlet of the hydraulic cylinder;

[0010] A swing rod, both ends of the swing rod are provided with adjusting long holes. The plunger rod and the hydraulic rod are respectively movably connected to the swing rod through corresponding connecting components. The connecting components are movably arranged in the adjusting long holes, and the swing rod is hinged to the base of the driving device through a hinge;

[0011] The filtering device is respectively arranged at the oil inlet and the oil outlet of the oil tank.

[0012] Preferably, the swing rod is a long strip plate with rounded corners at both ends, and the adjusting long hole on the swing rod is an oval long hole.

[0013] Preferably, the connecting component includes a screw, a nut and a gasket. The swing rod is connected to the plunger rod and the hydraulic rod through the screw and the nut, and the screw moves along the adjusting long hole.

[0014] Preferably, the hydraulic cylinder is connected to the oil tank and the oil cup through the oil supply pipe respectively, and a one-way valve is arranged on the oil supply pipe.

[0015] Preferably, the oil cup is connected to the oil tank through a return pipe.

[0016] Preferably, the filtering device is arranged on the oil supply pipe and the return pipe.

[0017] Preferably, the filtering device includes:

[0018] A first filter, arranged on the return pipe;

[0019] A second filter, arranged on the oil supply pipe between the oil tank and the hydraulic cylinder, and between the oil outlet of the oil tank and the one-way valve.

[0020] Preferably, a drain ball valve is arranged at the bottom of the oil tank.

[0021] Preferably, the driving device is a driving motor, and the output end of the driving motor is connected to the plunger rod through a coupling.

[0022] The device for automatic lubrication and cleaning of the throat of the plunger pump provided by the utility model includes an oil cup, a driving device, a controller, a hydraulic cylinder, a one-way valve, a swing rod and a filtering device. Specifically, the oil cup is arranged at the throat of the plunger pump, the plunger rod of the plunger pump moves up and down along the axial direction of the oil cup, the plunger rod is connected to the driving device, the driving device is signal-connected to the controller, and the running state of the driving device is controlled by the controller to drive the plunger rod to move up and down. The oil outlet of the oil cup is connected to the oil inlet of the oil tank, and the filtering device is respectively arranged at the oil inlet and the oil outlet of the oil tank, and can filter the grease flowing into and out of the oil tank to ensure the cleanliness of the grease. When the plunger rod moves downward, the oil cup is under pressure, and the grease flows out from the oil outlet of the oil cup, passes through the filtering device and enters the oil tank from the oil inlet of the oil tank.

[0023] The inner cavity of the hydraulic cylinder is provided with a hydraulic rod that moves up and down along the axial direction of the hydraulic cylinder. The oil inlet of the hydraulic cylinder is connected to the oil outlet of the fuel tank, and the oil outlet of the hydraulic cylinder is connected to the oil inlet of the oil cup. One-way valves are provided at both the oil inlet and the oil outlet of the hydraulic cylinder. When the hydraulic rod moves upward along the inner cavity of the hydraulic cylinder, the grease in the fuel tank is pumped out from the oil outlet of the fuel tank, passes through the filtering device and the one-way valve, and is pumped into the hydraulic cylinder from the oil inlet of the hydraulic cylinder. When the hydraulic rod moves downward along the inner cavity of the hydraulic cylinder, the grease in the inner cavity of the hydraulic cylinder is pressed out from the oil outlet of the hydraulic cylinder, passes through the one-way valve, and is pressed into the oil cup from the oil inlet of the oil cup. By providing one-way valves at the oil inlet and the oil outlet of the hydraulic cylinder, the one-way flow of grease can be achieved, and the problem of backflow will not occur.

[0024] Adjusting long holes are provided at both ends of the swing rod. The plunger rod and the hydraulic rod are respectively movably connected to the swing rod through corresponding connecting components. The connecting components are movably arranged in the adjusting long holes. The swing rod is hinged to the base of the driving device. By providing the swing rod and the connecting components, the connection between the hydraulic rod and the plunger rod is realized, and a lever is formed among the plunger rod, the swing rod and the hydraulic rod. With the hinge as the support point, by providing two adjusting long holes on the swing rod, when the plunger rod moves vertically up and down, the swing rod drives the hydraulic rod to move vertically in the opposite direction, so as to avoid interference at the connection points of the plunger rod and the hydraulic rod with the swing rod during the vertical lifting process, resulting in inability to move.

[0025] When the controller controls the output end of the driving device to extend, it drives the plunger rod to move downward synchronously along the inner cavity of the plunger pump, so as to press the grease in the oil cup into the fuel tank after being filtered by the filtering device. At the same time, it drives the end of the swing rod connected to the plunger rod to move downward synchronously, so that the connecting component close to the plunger rod moves along the adjusting long hole. Supported by the hinge, the other end of the swing rod will move upward, thereby driving the connecting component close to the hydraulic rod to move along another adjusting long hole, driving the hydraulic rod to move vertically upward, and at the same time pumping the grease in the fuel tank into the filtering device. After being filtered in the filtering device, it flows through the one-way valve and enters the hydraulic cylinder.

[0026] When the controller controls the output end of the driving device to contract, it drives the plunger rod to move upward synchronously along the inner cavity of the plunger pump, making the end of the swing rod connected to the plunger rod move upward synchronously, and at the same time driving the connecting component close to the plunger rod to move along the adjusting long hole. Supported by the hinge, the other end of the swing rod will move downward, thereby driving the connecting component close to the hydraulic rod to move along another adjusting long hole, driving the hydraulic rod to move vertically downward, so that the grease in the hydraulic cylinder flows through the one-way valve and is pressed into the oil cup. Thus, it is a process of an automatic lubrication and cleaning cycle.

[0027] The device for automatic lubrication and cleaning of the throat of a plunger pump set in the above manner controls the operating state of the driving device through a controller, further drives the up and down movement of the plunger rod, keeps a certain pressure in the oil cup all the time, ensures the fluidity of the grease in the oil cup, and thus realizes the automatic lubrication and cleaning of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0029] Figure 1 FIG. is a schematic structural diagram of the device for automatic lubrication and cleaning of the throat of a plunger pump provided by the present invention;

[0030] Figure 2 is Figure 1 a schematic structural diagram from another perspective;

[0031] Figure 3 FIG. is a partial enlarged view of the connection assembly provided by the present invention;

[0032] Figure 4 FIG. is a schematic structural diagram of the maximum stroke of the device for automatic lubrication and cleaning of the throat of a plunger pump provided by the present invention;

[0033] Figure 5 is Figure 4 a schematic structural diagram from another perspective.

[0034] Reference numerals:

[0035] 1 - oil cup;

[0036] 2 - plunger pump, 21 - plunger rod;

[0037] 3 - driving device;

[0038] 4 - fuel tank;

[0039] 5 - hydraulic cylinder, 51 - hydraulic rod;

[0040] 6 - check valve;

[0041] 7 - swing rod, 71 - adjusting long hole;

[0042] 8 - connection assembly, 81 - screw, 82 - nut, 83 - gasket;

[0043] 9 - filtering device, 91 - first filter, 92 - second filter;

[0044] 10 - Hinge;

[0045] 11 - Oil supply pipe;

[0046] 12 - Return pipe;

[0047] 13 - Drain ball valve. Specific embodiments

[0048] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0049] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] It should be noted that the following orientation words such as "up" and "down" are defined based on the accompanying drawings of the specification.

[0051] The core of the present utility model is to provide a device for automatic lubrication and cleaning of the throat of a plunger pump, enabling the oil cup 1 to work automatically in a cycle to achieve the function of automatic lubrication and cleaning of the throat, thereby reducing labor costs.

[0052] Please refer to Figure 1 、 Figure 2 and Figure 3 A device for automatic lubrication and cleaning of the throat of a plunger pump includes an oil cup 1, a driving device 3, a controller, a hydraulic cylinder 5, a one-way valve 6, a swing rod 7, and a filtering device 9.

[0053] Specifically, the oil cup 1 is arranged at the throat of the plunger pump 2. The plunger rod 21 of the plunger pump 2 moves up and down along the axial direction of the oil cup 1. The plunger rod 21 is connected to the driving device 3, and the driving device 3 is signal-connected to the controller. The operating state of the driving device 3 is controlled by the controller to drive the plunger rod 21 to move up and down. The oil outlet of the oil cup 1 is connected to the oil inlet of the fuel tank 4. The filtering device 9 is respectively arranged at the oil inlet and the oil outlet of the fuel tank 4, and can filter the grease flowing into and out of the fuel tank 4 to ensure the cleanliness of the grease. When the plunger rod 21 moves downward, the oil cup 1 is under pressure, and the grease flows out from the oil outlet of the oil cup 1, passes through the filtering device 9 and enters the fuel tank 4 from the oil inlet of the fuel tank 4.

[0054] The inner cavity of the hydraulic cylinder 5 is provided with a hydraulic rod 51 that moves up and down along the axial direction of the hydraulic cylinder 5. The oil inlet of the hydraulic cylinder 5 is connected to the oil outlet of the fuel tank 4, and the oil outlet of the hydraulic cylinder 5 is connected to the oil inlet of the oil cup 1. One-way valves 6 are respectively arranged at the oil inlet and the oil outlet of the hydraulic cylinder 5. When the hydraulic rod 51 moves upward along the inner cavity of the hydraulic cylinder 5, the grease in the fuel tank 4 is pumped out from the oil outlet of the fuel tank 4, passes through the filtering device 9 and the one-way valve 6, and is pumped into the hydraulic cylinder 5 from the oil inlet of the hydraulic cylinder 5. When the hydraulic rod 51 moves downward along the inner cavity of the hydraulic cylinder 5, the grease in the inner cavity of the hydraulic cylinder 5 is pressed out from the oil outlet of the hydraulic cylinder 5, passes through the one-way valve 6, and is pressed into the oil cup 1 from the oil inlet of the oil cup 1. By arranging one-way valves 6 at the oil inlet and the oil outlet of the hydraulic cylinder 5, the one-way flow of grease can be realized, and the problem of backflow will not occur.

[0055] Adjusting long holes 71 are arranged at both ends of the swing rod 7. The plunger rod 21 and the hydraulic rod 51 are respectively movably connected to the swing rod 7 through corresponding connecting components 8. The connecting components 8 are movably arranged in the adjusting long holes 71. The swing rod 7 is hinged to the base of the driving device 3 through a hinge 10. By arranging the swing rod 7 and the connecting components 8, the connection between the hydraulic rod 51 and the plunger rod 21 is realized, and a lever is formed among the plunger rod 21, the swing rod 7 and the hydraulic rod 51, with the hinge 10 as the support point. By arranging two adjusting long holes 71 on the swing rod 7, when the plunger rod 21 moves vertically up and down, the hydraulic rod 51 is driven by the swing rod 7 to move vertically in the opposite direction, so as to avoid interference at the connection points of the plunger rod 21 and the hydraulic rod 51 with the swing rod 7 during the vertical lifting process, resulting in inability to move. It should be noted that the plunger rod 21 and the hydraulic rod 51 are respectively connected to two different positions of the swing rod 7, that is to say, there are two adjusting long holes 71, and they are arranged at different positions, for example, at both ends of the swing rod 7.

[0056] When the controller controls the output end of the driving device 3 to extend, it drives the plunger rod 21 to move downward synchronously along the inner cavity of the plunger pump 2, so as to press the grease in the oil cup 1 into the fuel tank 4 after being filtered by the filtering device 9. At the same time, it drives the end of the swing rod 7 connected to the plunger rod 21 to move downward synchronously, so that the connecting component 8 close to the plunger rod 21 moves along the adjusting long hole 71. Supported by the hinge 10, the other end of the swing rod 7 will move upward, and then drive the connecting component 8 close to the hydraulic rod 51 to move along another adjusting long hole 71, driving the hydraulic rod 51 to move vertically upward. At the same time, the grease in the fuel tank 4 is pumped into the filtering device 9, and after being filtered in the filtering device 9, it flows through the one-way valve 6 and enters the hydraulic cylinder 5.

[0057] When the controller controls the output end of the driving device 3 to contract, it drives the plunger rod 21 to move upward synchronously along the inner cavity of the plunger pump 2, so that the end of the swing rod 7 connected to the plunger rod 21 moves upward synchronously. At the same time, it drives the connecting component 8 close to the plunger rod 21 to move along the adjusting long hole 71. Supported by the hinge 10, the other end of the swing rod 7 will move downward, and then drive the connecting component 8 close to the hydraulic rod 51 to move along another adjusting long hole 71, driving the hydraulic rod 51 to move vertically downward, so that the grease in the hydraulic cylinder 5 is pressed into the oil cup 1 after flowing through the one-way valve 6. Thus, it is a process of an automatic lubrication and cleaning cycle.

[0058] Among them, the fuel tank 4 provides a storage space for the circulating grease.

[0059] The device for automatic lubrication and cleaning of the plunger pump throat set in the above manner controls the operating state of the driving device 3 through the controller, further drives the up and down movement of the plunger rod 21, keeps a certain pressure on the oil cup 1 all the time, ensures the fluidity of the grease in the oil cup 1, thereby realizes the automatic lubrication and cleaning of the plunger pump 2, and further reduces the labor cost.

[0060] In the above embodiment, the swing rod 7 is hinged to the base of the driving device 3 through the hinge 10, and the hinge 10 is rotatably connected to the swing rod 7.

[0061] It should be noted that the hinge 10 is used to fix the swing rod 7, provides a fulcrum for the up and down swing of the swing rod 7. One end of the swing rod 7 is connected to the plunger rod 21, the other end is connected to the hydraulic rod 51, and the middle is rotatably connected to the hinge 10, forming a structure similar to a seesaw. Through the swing rod 7, the up and down movement of the plunger rod 21 is transmitted to the hydraulic rod 51, driving the up and down lifting movement of the hydraulic rod 51.

[0062] The swing rod 7 swings as the plunger rod 21 moves up and down in the vertical direction, thereby driving the hydraulic rod 51 to move up and down in the vertical direction. When the controller controls the driving device 3 to drive the plunger rod 21 to move upward, it drives the swing rod 7 to rotate clockwise with the hinge 10 as the fulcrum, thereby driving the hydraulic rod 51 to move downward along the inner cavity of the hydraulic cylinder 5, so that the grease in the inner cavity of the hydraulic cylinder 5 is pressed out; when the controller controls the driving device 3 to drive the plunger rod 21 to move downward, it drives the swing rod 7 to rotate counterclockwise with the hinge 10 as the fulcrum, thereby driving the hydraulic rod 51 to move upward along the inner cavity of the hydraulic cylinder 5, so that the grease is pressed into the inner cavity of the hydraulic cylinder 5.

[0063] Wherein, during the lifting process of the plunger rod 21 and the hydraulic rod 51, the connecting component 8 slides along the adjusting long hole 71, which can prevent interference between the connection point of the plunger rod 21 and the swing rod 7 and the connection point of the hydraulic rod 51 and the swing rod 7. Moreover, there is no limit to the length of the adjusting long hole 72, as long as the plunger rod 21 can drive the hydraulic rod 51 to move vertically up and down in the opposite direction when moving vertically up and down through the swing rod 7.

[0064] In the above situation, the swing rod 7 is a long strip plate with rounded corners at both ends, and the adjusting long hole 71 on the swing rod 7 is an oval long hole.

[0065] It can be understood that the hydraulic rod 51 is usually cylindrical. In order to facilitate the planar contact between the swing rod 7 and the hydraulic rod 51, in this application, the end of the hydraulic rod 51 in contact with the swing rod 7 is set as a plate-like structure. In actual applications, there is no limit to this, as long as the above technical effects can be achieved.

[0066] Furthermore, the connecting component 8 includes a screw 81, a nut 82 and a gasket 83. The swing rod 7 connects the plunger rod 21 and the hydraulic rod 51 through the screw 81 and the nut 82, and the screw 81 moves along the adjusting long hole 71.

[0067] It should be noted that the swing rod 7 is connected to the corresponding plunger rod 21 and hydraulic rod 51 through the screw 81 and the nut 82. Gaskets 83 are provided between the nut 82 and the hydraulic rod 51 and the plunger rod 21, and between the screw 81 and the swing rod 7 to reduce the wear on the hydraulic rod 51 and the swing rod 7. During the up and down movement of the plunger rod 21, it drives the screw 81 to slide in the adjusting long hole 71, so that when the plunger rod 21 moves in the vertical direction, it can smoothly drive the hydraulic rod 51 to move in the vertical direction through the swing rod 7.

[0068] Wherein, the distance from the hinge 10 to the plunger rod 21 is L1, the distance from the hinge 10 to the hydraulic cylinder 5 is L2, the stroke of the up and down movement of the plunger rod 21 is H1, and the stroke of the up and down movement of the hydraulic cylinder 5 is H2. It is set that when the plunger rod 21 is at the lowest position, it is the initial position. At this time, the swing rod 7 is in a horizontal state, both L1 and L2 are at the minimum value, and H1 = H2 = 0, asFigure 1 and Figure 2 As shown. When the plunger rod 21 moves upward or downward, as Figure 4 and Figure 5 shown, the hydraulic rod 51 moves in the reverse direction. The stroke of the plunger rod 21 and the hydraulic rod 51 is proportional to the distance to the swing rod 7, that is: H1 / H2 = L1 / L2.

[0069] In the above embodiment, the hydraulic cylinder 5 is connected to the fuel tank 4 and the oil cup 1 through the oil supply pipe 11, and a check valve 6 is provided on the oil supply pipe 11.

[0070] It can be understood that the fuel tank 4, the hydraulic cylinder 5 and the oil cup 1 are connected through the oil supply pipe 11. The oil outlet of the fuel tank 4 is connected to the oil inlet of the hydraulic cylinder 5, and the oil outlet of the hydraulic cylinder 5 is connected to the oil inlet of the oil cup 1, so that the grease pumped out from the fuel tank 4 can enter the hydraulic cylinder 5 through the oil supply pipe 11. The grease entering the hydraulic cylinder 5 is pressed out by the hydraulic cylinder 5, flows through the oil supply pipe 11 and then enters the oil cup 1 from the oil inlet of the oil cup 1. The check valve 6 is provided to prevent the grease in the hydraulic cylinder 5 from flowing back into the fuel tank 4 from the oil inlet of the hydraulic cylinder 5, and also to prevent the grease in the oil cup 1 from flowing back into the hydraulic cylinder 5 from the oil inlet of the oil cup 1.

[0071] Based on the above embodiment, the oil cup 1 and the fuel tank 4 are connected through a return pipe 12.

[0072] It should be noted that the fuel tank 4 and the oil cup 1 are connected through the return pipe 12. The oil outlet of the oil cup 1 is connected to the oil inlet of the fuel tank 4, so that the grease pressed out from the oil cup 1 can return to the fuel tank 4 through the return pipe 12.

[0073] In the above embodiment, the filtering device 9 is provided on the oil supply pipe 11 and the return pipe 12.

[0074] It can be understood that the filtering device 9 is used to filter impurities in the grease. Being provided on the pipelines of the oil supply pipe 11 and the return pipe 12 can ensure that the grease entering and flowing out of the fuel tank 4 is clean grease.

[0075] Furthermore, the filtering device 9 includes a first filter 91 and a second filter 92. The first filter 91 is provided on the return pipe 12, and the second filter 92 is provided on the oil supply pipe 11 between the fuel tank 4 and the hydraulic cylinder 5, and is provided between the oil outlet of the fuel tank 4 and the check valve 6.

[0076] It should be noted that the first filter 91 is provided on the pipeline of the return pipe 12 to prevent impurities in the grease entering the fuel tank 4, and the second filter 92 is provided on the pipeline of the oil supply pipe 11 between the fuel tank 4 and the hydraulic cylinder 5 to prevent impurities in the grease entering the hydraulic cylinder 5.

[0077] Among them, a one-way valve 6 is provided between the fuel tank 4 and the hydraulic cylinder 5, and the second filter 92 is arranged between the outlet of the fuel tank 4 and the one-way valve 6, which can prevent impurities in the grease from entering the hydraulic cylinder 5.

[0078] In the above situation, a drain ball valve 13 is provided at the bottom of the fuel tank 4.

[0079] It can be understood that the drain ball valve 13 is located at the bottom of the fuel tank 4 and is used to drain the waste grease or impurities in the fuel tank 4. Among them, the drain ball valve 13 can be manually controlled or controlled by a controller, and there is no limitation on this, as long as the above technical effects can be achieved.

[0080] In the above embodiment, the driving device 3 is a driving motor, and the output end of the driving motor is connected to the plunger rod 21 through a coupling.

[0081] It should be noted that the driving motor is controlled by a controller and is internally a reciprocating hydraulic structure that makes reciprocating movements. The output end of the driving motor is connected to the plunger rod 21, driving the plunger rod 21 to move up and down in the plunger pump 2.

[0082] In summary, for the device for automatic lubrication and cleaning of the throat of the plunger pump provided by the present utility model, when the controller controls the output end of the driving device 3 to move downward, it drives the plunger rod 21 to move downward along the inner cavity of the plunger pump 2, driving the swing rod 7 to rotate counterclockwise with the hinge 10 as the fulcrum, thereby driving the hydraulic rod 51 to move upward along the inner cavity of the hydraulic cylinder 5, so that the grease in the fuel tank 4 is pumped out, flows out from the oil outlet of the fuel tank 4, passes through the second filter 92 on the oil supply pipe 11 to filter impurities in the grease, then flows through the one-way valve 6 and enters the inner cavity of the hydraulic cylinder 5 from the oil inlet of the hydraulic cylinder 5.

[0083] Please refer to Figure 4 and Figure 5 , when the controller controls the output end of the driving device 3 to move upward, driving the plunger rod 21 to move upward along the inner cavity of the plunger pump 2, it drives the swing rod 7 to rotate clockwise with the hinge 10 as the fulcrum, thereby driving the hydraulic rod 51 to move downward along the inner cavity of the hydraulic cylinder 5, so that the grease in the inner cavity of the hydraulic cylinder 5 is pressed out, flows out from the oil outlet of the hydraulic cylinder 5, passes through the oil supply pipe 11 and enters the oil cup 1 at the throat of the plunger pump 2 from the oil inlet of the oil cup 1; at the same time, the oil cup 1 at the throat of the plunger pump 2 is under pressure, and the grease in the oil cup 1 is discharged from the oil outlet of the oil cup 1, filtered by the first filter 91 on the return pipe 12, and the filtered grease flows into the fuel tank 4 from the oil inlet of the fuel tank 4.

[0084] The above process is the automatic circulation working process of the oil cup 1 at the throat of the plunger pump 2. During this process, a certain pressure is always maintained in the oil cup 1 at the throat of the plunger pump 2 to ensure that there is always a fixed stock of grease in the oil cup 1; the impurities at the bottom of the oil cup 1 at the throat of the plunger pump 2 will be discharged along with the reflux grease to ensure the cleanliness of the grease in the oil cup 1.

[0085] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0086] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts between the various embodiments, reference can be made to each other.

[0087] The above has introduced in detail a device for automatic lubrication and cleaning of the throat of a plunger pump provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An apparatus for automatic lubrication and cleaning of the throat of a plunger pump, characterized in that, Comprising: An oil cup (1), provided at the throat of a plunger pump (2), with the plunger rod (21) of the plunger pump (2) moving up and down along the axial direction of the oil cup (1). The plunger rod (21) is connected to a driving device (3), and the driving device (3) is signal-connected to a controller. The oil outlet of the oil cup (1) is connected to the oil inlet of a fuel tank (4); A hydraulic cylinder (5), with a hydraulic rod (51) moving up and down along the axial direction of the hydraulic cylinder (5) provided in the inner cavity of the hydraulic cylinder (5). The oil inlet of the hydraulic cylinder (5) is connected to the oil outlet of the fuel tank (4), the oil outlet of the hydraulic cylinder (5) is connected to the oil inlet of the oil cup (1), and one-way valves (6) are provided at both the oil inlet and the oil outlet of the hydraulic cylinder (5); A swing rod (7), with adjusting long holes (71) provided at both ends of the swing rod (7). The plunger rod (21) and the hydraulic rod (51) are respectively movably connected to the swing rod (7) through corresponding connecting components (8). The connecting components (8) are movably provided in the adjusting long holes (71), and the swing rod (7) is hinged to the base of the driving device (3) through a hinge (10); A filtering device (9), respectively provided at the oil inlet and the oil outlet of the fuel tank (4).

2. The device for automatic lubrication and cleaning of the throat of a plunger pump according to claim 1, characterized in that, The swing rod (7) is a long strip plate with rounded corners at both ends, and the adjusting long holes (71) on the swing rod (7) are waist-shaped long holes.

3. The device for automatic lubrication and cleaning of the throat of a plunger pump according to claim 1, characterized in that, The connecting component (8) includes a screw (81), a nut (82) and a gasket (83). The swing rod (7) connects the plunger rod (21) and the hydraulic rod (51) through the screw (81) and the nut (82), and the screw (81) moves along the adjusting long hole (71).

4. The device for automatic lubrication and cleaning of the throat of a plunger pump according to claim 1, characterized in that, The hydraulic cylinder (5) is connected to the fuel tank (4) and the oil cup (1) through oil supply pipes (11), and one-way valves (6) are provided on the oil supply pipes (11).

5. The device for automatic lubrication and cleaning of the throat of a plunger pump according to claim 4, characterized in that, The oil cup (1) is connected to the fuel tank (4) through a return pipe (12).

6. The device for automatic lubrication and cleaning of the throat of a plunger pump according to claim 5, characterized in that, The filtering device (9) is provided on the oil supply pipe (11) and the return pipe (12).

7. The device for automatic lubrication and cleaning of the throat of a plunger pump according to claim 6, characterized in that, The filtering device (9) comprises: A first filter (91), provided on the return pipe (12); A second filter (92), provided on the oil supply pipe (11) between the fuel tank (4) and the hydraulic cylinder (5), and provided between the oil outlet of the fuel tank (4) and the one-way valve (6).

8. The device for automatic lubrication and cleaning of the throat of a plunger pump according to claim 7, characterized in that, A drain ball valve (13) is provided at the bottom of the fuel tank (4).

9. The device for automatic lubrication and cleaning of the throat of a plunger pump according to any one of claims 1-8, characterized in that, The driving device (3) is a driving motor, and the output end of the driving motor is connected to the plunger rod (21) through a coupling.

Images