A plunger feed pump

Abstract

This invention provides a plunger-type feed pump, comprising an actuator and a plunger pump. The plunger pump includes a cylinder, a plunger, and an end cap. The end cap is located at the opening of the cylinder, and a guide hole is provided at the center of the end cap to guide the plunger. The plunger is cylindrical, and its inner end is slidably inserted into the cylinder through the guide hole. The actuator is connected to the outer end of the plunger to drive the plunger to reciprocate. Two or more sealing rings are embedded in the inner wall of the guide hole of the end cap to seal the gap between the plunger and the guide hole. An oil reservoir is formed between two adjacent sealing rings, the plunger, and the inner wall of the guide hole of the end cap. An external lubricating oil source is connected to the oil reservoir through a lubricating oil passage to supply lubricating oil to the oil reservoir and thus lubricate the plunger. This invention provides better lubrication, ensuring that the plunger is adequately lubricated during operation, avoiding jamming, and improving work efficiency and effectiveness.

Description

Technical Field

[0001] This utility model relates to the field of pump technology for filter presses, and in particular to a plunger-type feed pump. Background Technology

[0002] Currently, filter presses are commonly used solid-liquid separation machines. By applying pressure to a solid-liquid mixture, the liquid material in the mixture is forced to seep out and separate from the solid material. Filter presses are mostly used to process solid-liquid mixtures such as slurry and mud. These materials typically have high viscosity and poor flowability, so a dedicated feed pump is required when using a filter press to pump the material into the machine.

[0003] Common pumps used in filter presses include slurry pumps and screw pumps. Slurry pumps use a motor to drive the impeller, which in turn feeds material into the filter press. Screw pumps, on the other hand, use a motor to drive the screw, which in turn feeds material into the filter press. Both types of feed pumps directly utilize the mechanical energy generated by the motor torque, resulting in relatively high energy consumption, higher costs, and lower efficiency. Furthermore, because the working environment of feed pumps is often rough, they frequently cannot be lubricated in a timely manner, leading to blockages and necessitating production stoppages for maintenance, thus increasing production costs. Utility Model Content

[0004] The purpose of this utility model is to provide a plunger-type feed pump to solve at least one of the above-mentioned technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a plunger-type feed pump, comprising: an actuator and a plunger pump;

[0006] The plunger pump includes: a cylinder body, a plunger, and an end cap;

[0007] The end cap is disposed at the opening of the cylinder body, and the center of the end cap is provided with a guide hole that slides and guides the plunger.

[0008] The plunger is cylindrical, and its inner end is slidably inserted into the cylinder body through the guide hole;

[0009] The actuating component is connected to the outer end of the plunger and is used to drive the plunger to reciprocate.

[0010] Two or more sealing rings are embedded in the inner wall of the end cap guide hole to seal the gap between the plunger and the guide hole;

[0011] An oil reservoir is formed by the two adjacent sealing rings, the plunger, and the inner wall of the end cap guide hole. An external lubricating oil source is connected to the oil reservoir through a lubricating oil passage to supply lubricating oil into the oil reservoir and thus lubricate the plunger.

[0012] When multiple sealing rings are provided, one oil reservoir as described above can be provided, or multiple oil reservoirs can be provided to lubricate the plunger, both of which are within the scope of the inventive concept of this application.

[0013] Preferably, the external lubricating oil source includes a lubricating pump and a lubricating oil tank, with the oil storage chamber and the lubricating oil tank connected at both ends of the lubricating oil circuit, and the lubricating pump is installed on the lubricating oil circuit.

[0014] Preferably, a control valve is provided in the lubricating oil circuit to control the opening and closing of the lubricating oil circuit.

[0015] Furthermore, it also includes a controller, which is connected to the lubrication pump and the control valve, and achieves periodic oil supply to the oil storage chamber by controlling the timed opening of the lubrication pump and the control valve.

[0016] Furthermore, the cylinder body is provided with a recessed platform at its opening;

[0017] The end cap includes a main body and a guide sleeve; the guide sleeve is inserted into the annular space formed by the sinking platform.

[0018] The main body and guide sleeve are made as one piece, forming a T-shape. The main body is cap-shaped and has a connecting part that mates with the cylinder end face. After the bottom surface of the connecting part abuts against the cylinder end face, it can be fixed and connected using fasteners such as screws or bolts.

[0019] Furthermore, one or more of the sealing rings are embedded in the guide sleeve; one or more of the sealing rings are embedded in the main body.

[0020] Furthermore, an oil storage cavity is provided at the connection between the main body and the guide sleeve, and an oil delivery hole communicating with the inside and outside of the oil storage cavity is provided inside the main body.

[0021] This application extends the axial length of the guide hole, i.e., the mating length with the plunger, by setting a guide sleeve, thereby providing more installation space for multiple sealing rings. The oil reservoir can also be configured in multiple ways as needed, or its axial width can be increased, thereby improving the overall lubrication capacity.

[0022] Preferably, one or more annular mounting grooves are provided on the inner wall of the guide hole of the end cap, and the sealing ring is embedded in the annular mounting groove.

[0023] Furthermore, the bottom of the cylinder is provided with a feed inlet and a discharge outlet.

[0024] Furthermore, the cylinder and plunger are made of ceramic material.

[0025] Furthermore, it includes two sets of the aforementioned actuators and a plunger pump;

[0026] The actuating component includes a first hydraulic cylinder and a second hydraulic cylinder; and also includes an oil pump;

[0027] The plunger pump includes a first plunger pump and a second plunger pump;

[0028] The first hydraulic piston in the first hydraulic cylinder is connected to the first working piston in the first piston pump, and is used to drive the first working piston to reciprocate within the first piston pump for operation; the second hydraulic piston in the second hydraulic cylinder is connected to the second working piston in the second piston pump, and is used to drive the second working piston to reciprocate within the second piston pump for operation.

[0029] The first rod chamber of the first hydraulic cylinder and the second rod chamber of the second hydraulic cylinder are connected through an intermediate pipeline, and the oil pump is connected to the first rodless chamber of the first hydraulic cylinder and the second rodless chamber of the second hydraulic cylinder through an oil supply line; or, the first rodless chamber of the first hydraulic cylinder and the second rodless chamber of the second hydraulic cylinder are connected through an intermediate pipeline, and the oil pump is connected to the first rod chamber of the first hydraulic cylinder and the second rod chamber of the second hydraulic cylinder through an oil supply line; the oil pump alternately supplies oil to the first hydraulic cylinder and the second hydraulic cylinder through the oil supply line, thereby realizing the alternating operation of the first plunger pump and the second plunger pump.

[0030] This invention achieves continuous material feeding by setting up two interconnected first and second hydraulic cylinders, enabling the two piston cylinders to work alternately without interruption. This greatly improves the material feeding speed.

[0031] Furthermore, a first feed inlet is provided on one side of the cylinder body of the first plunger pump, and a first discharge outlet is provided on the other side;

[0032] The second plunger pump cylinder body has a second inlet on one side and a second outlet on the other side;

[0033] The first and second inlets are connected to the feed pipeline and are used to feed materials into the first and second plunger pumps, respectively.

[0034] The first and second discharge ports are connected to the feed pipeline and are used to convey materials to the filter press through the feed pipeline, respectively.

[0035] Furthermore, a first feed check valve is provided between the first feed inlet and the feed pipeline, for the material in the feed pipeline to pass through the first feed inlet in one direction and enter the cylinder of the first plunger pump.

[0036] A second feed check valve is provided between the second feed inlet and the feed pipeline, so that the material in the feed pipeline can pass through the second feed inlet in one direction and enter the cylinder of the second plunger pump.

[0037] Preferably, the first feed inlet and the second feed inlet are connected to the feed pipeline through two feed branches, and the first feed check valve and the second feed check valve are respectively installed on the two feed branches; a main feed inlet is provided in the middle of the feed pipeline.

[0038] Furthermore, a first feed check valve is provided between the first discharge port and the feed pipeline, for the material in the first plunger pump to pass through the first discharge port and enter the feed pipeline in one direction;

[0039] A second feed check valve is provided between the second discharge port and the feed pipeline, so that the material in the second plunger pump can pass through the second discharge port and enter the feed pipeline in one direction.

[0040] Preferably, the first discharge port and the second discharge port are connected to the feed pipeline through two feed branches, and the first feed check valve and the second feed check valve are respectively installed on the two feed branches; a main feed port is provided in the middle of the feed pipeline, and the main feed port is connected to the inlet of the filter press through the pipeline.

[0041] Furthermore, a reversing valve is provided on the oil supply line. The inlet of the reversing valve is connected to the outlet of the oil pump through an oil circuit. The two outlets of the reversing valve are respectively connected to the rodless chamber or the rod chamber of the first hydraulic cylinder and the second hydraulic cylinder, for selectively supplying oil to the first hydraulic cylinder or the second hydraulic cylinder.

[0042] Furthermore, the first hydraulic cylinder and the second hydraulic cylinder are provided with a return port on the rod-side or rodless side connected to the oil supply circuit, and the return port is connected to the oil tank through a return pipeline.

[0043] When the oil supply line supplies oil to one of the first hydraulic cylinder and the second hydraulic cylinder, the other of the first hydraulic cylinder and the second hydraulic cylinder discharges the hydraulic oil in its rod chamber or rodless chamber back to the oil tank through the return oil line.

[0044] Furthermore, the controller is connected to the oil pump and the reversing valve respectively, and is used to control the oil pump to alternately supply oil to the first hydraulic cylinder and the second hydraulic cylinder, so as to realize the alternating operation of the first plunger pump and the second plunger pump.

[0045] Preferably, the piston inside the piston cylinder is connected to a push rod extending from the hydraulic cylinder via a piston rod. More preferably, the piston rod of the piston cylinder and the push rod of the hydraulic cylinder are coaxially connected via a coupling.

[0046] Furthermore, the first hydraulic cylinder, the first plunger pump, the second hydraulic cylinder, and the second plunger pump are arranged vertically;

[0047] Alternatively, the first hydraulic cylinder, the first plunger pump, the second hydraulic cylinder, and the second plunger pump are arranged horizontally.

[0048] Therefore, the feed pump of this application can be a vertical or horizontal structure.

[0049] By adopting the above technical solution, this utility model has the following beneficial effects:

[0050] The present invention provides a plunger-type feed pump with better lubrication, which can ensure that the plunger is fully lubricated during operation, avoid the occurrence of jamming, and improve work efficiency and effect. Attached Figure Description

[0051] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0052] Figure 1 Left view of the plunger-type feed pump provided in an embodiment of this utility model;

[0053] Figure 2 A front view of the plunger-type feed pump provided in an embodiment of this utility model;

[0054] Figure 3 This is a schematic diagram of the plunger pump in the embodiment;

[0055] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0056] Figure 5 This is a partial structural diagram of another embodiment of the end cap;

[0057] Figure 6 A top view of the plunger-type feed pump provided in an embodiment of this utility model;

[0058] Figure label:

[0059] 1-Sealing ring; 2-Lubricating oil tank; 3-Lubrication pump; 4-Controller; 5-Control valve; 6-Oil pump; 7-Oil supply line; 8-Directional valve; 10-Plunger pump; 10a-First plunger pump; 10b-Second plunger pump; 11-Cylinder body; 12-Inlet; 12a-First inlet; 12b-Second inlet; 13-Outlet; 13a-First outlet; 13b-Second outlet; 15-Plunger; 15a-First working plunger; 15b-Second working plunger; 20-End cap; 21-Guide sleeve; 22-Guide hole; 23-Oil reservoir; 25-Main body; 30-Inlet pipeline; 40-Supply pipeline; 50a-First inlet check valve; 50b-Second inlet check valve; 100-Actuating component; 110-First hydraulic cylinder; 120-Second hydraulic cylinder. Detailed Implementation

[0060] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0061] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0063] The present invention will be further explained below with reference to specific embodiments.

[0064] Example 1

[0065] like Figure 1-3As shown, this embodiment provides a plunger-type feed pump, including: an actuator 100 and a plunger pump 10; the plunger pump 10 includes: a cylinder 11, a plunger 15 and an end cap 20; the end cap 20 is disposed at the opening of the cylinder 11, and the center of the end cap 20 is provided with a guide hole 22 that slides and guides the plunger 15; the plunger 15 is cylindrical, and its inner end is slidably inserted into the cylinder 11 through the guide hole 22; the actuator 100 is connected to the outer end of the plunger 15 and is used to drive the plunger 15 to reciprocate.

[0066] Two or more sealing rings 1 are embedded in the inner wall of the guide hole 22 of the end cap 20 to seal the gap between the plunger 15 and the guide hole 22. An oil reservoir 23 is formed by two adjacent sealing rings 1, the plunger 15 and the inner wall of the guide hole 22 of the end cap 20. An external lubricating oil source is connected to the oil reservoir 23 through a lubricating oil passage to supply lubricating oil into the oil reservoir 23 to lubricate the plunger 15.

[0067] See Figure 4 and 5 As shown, when multiple sealing rings 1 are provided, one oil storage chamber 23 as described above can be provided, or multiple oil storage chambers 23 can be provided to lubricate the plunger 15, both of which are within the scope of the inventive concept of this application.

[0068] Preferably, the external lubricating oil source includes a lubricating pump 3 and a lubricating oil tank 2, with the oil storage chamber 23 and the lubricating oil tank 2 connected at both ends of the lubricating oil circuit, and the lubricating pump 3 is installed on the lubricating oil circuit.

[0069] Preferably, a control valve 5 is provided on the lubricating oil circuit to control the opening and closing of the lubricating oil circuit. This embodiment also includes a controller 4, which is connected to the lubricating pump 3 and the control valve 5. By controlling the timed opening of the lubricating pump 3 and the control valve 5 and the flow rate, the controller enables periodic oil supply to the oil storage chamber 23.

[0070] More preferably, the cylinder body 11 is provided with a recessed platform at its opening; the end cover 20 includes a main body 25 and a guide sleeve 21; the guide sleeve 21 is inserted into the annular space formed by the recessed platform.

[0071] The main body 25 and the guide sleeve 21 are integrally formed and are T-shaped. The main body is cap-shaped and has a connecting part that mates with the end face of the cylinder 11. After the bottom surface of the connecting part abuts against the end face of the cylinder 11, it can be fixedly connected by fasteners such as screws or bolts.

[0072] Furthermore, one or more sealing rings 1 are embedded in the guide sleeve 21; one or more sealing rings 1 are embedded in the main body 25. An oil storage cavity 23 is provided at the connection between the main body 25 and the guide sleeve 21, and an oil delivery hole communicating with the inside and outside of the oil storage cavity 23 is provided in the main body 25.

[0073] This application extends the length of the guide hole 22 axially by providing a guide sleeve 21, which is the mating length with the plunger 15, thereby providing more installation space for multiple sealing rings 1. The oil reservoir 23 can also be configured in multiple ways as needed, or its axial width can be increased, thereby improving the overall lubrication capacity.

[0074] Preferably, one or more annular mounting grooves are provided on the inner wall of the guide hole 22 of the end cap 20, and the sealing ring 1 is embedded in the annular mounting groove.

[0075] Furthermore, the bottom of the cylinder body 11 is provided with a feed inlet 12 and a discharge outlet 13.

[0076] In this embodiment, the cylinder body 11 and the plunger 15 are preferably made of ceramic material. The end cap 20 may be made of ceramic material or metal material.

[0077] The actuator 100 can be a telescopic mechanism such as a hydraulic cylinder or a pneumatic cylinder, used to drive the plunger 15 to reciprocate.

[0078] The present invention provides a plunger-type feed pump with better lubrication, which can ensure that the plunger 15 is fully lubricated during operation, avoid the occurrence of jamming, and improve work efficiency and effect.

[0079] Example 2

[0080] This embodiment is basically the same as embodiment 1, except that:

[0081] See Figure 1-2 and Figure 6 As shown, this embodiment includes two sets of the aforementioned execution components 100 and plunger pump 10.

[0082] The actuation component 100 includes a first hydraulic cylinder 110 and a second hydraulic cylinder 120; and also includes an oil pump 6;

[0083] The plunger pump 10 includes a first plunger pump 10a and a second plunger pump 10b;

[0084] The first hydraulic piston in the first hydraulic cylinder 110 is connected to the first working piston 15a in the first piston pump 10a, and is used to drive the first working piston 15a to reciprocate within the first piston pump 10a for operation; the second hydraulic piston in the second hydraulic cylinder 120 is connected to the second working piston 15b in the second piston pump 10b, and is used to drive the second working piston 15b to reciprocate within the second piston pump 10b for operation.

[0085] The first rodless chamber of the first hydraulic cylinder 110 and the second rodless chamber of the second hydraulic cylinder 120 are connected through an intermediate pipeline 130. The oil pump 6 is connected to the first rod chamber of the first hydraulic cylinder 110 and the second rod chamber of the second hydraulic cylinder 120 through an oil supply line 7. The oil pump 6 alternately supplies oil to the first hydraulic cylinder 110 and the second hydraulic cylinder 120 through the oil supply line 7, thereby realizing the alternating operation of the first plunger pump 10a and the second plunger pump 10b.

[0086] Alternatively, the first rod chamber of the first hydraulic cylinder 110 and the second rod chamber of the second hydraulic cylinder 120 are connected through an intermediate pipeline 130, and the oil pump 6 is connected through an oil supply line 7 to the first rodless chamber of the first hydraulic cylinder 110 and the second rodless chamber of the second hydraulic cylinder 120 respectively; the oil pump 6 alternately supplies oil to the first hydraulic cylinder 110 and the second hydraulic cylinder 120 through the oil supply line 7, thereby realizing the alternating operation of the first plunger pump 10a and the second plunger pump 10b.

[0087] Furthermore, a first feed port 12a is provided on one side of the bottom of the cylinder body 11 of the first plunger pump 10a, and a first discharge port 13a is provided on the other side.

[0088] The second plunger pump 10b has a second inlet 12b on one side of the bottom of the cylinder body 11 and a second outlet 13b on the other side; the first inlet 12a and the second inlet 12b are connected to the feed pipe 30 and are used to input materials into the first plunger pump 10a and the second plunger pump 10b respectively.

[0089] The first discharge port 13a and the second discharge port 13b are connected to the feed pipeline 40 and are used to convey materials to the filter press through the feed pipeline 40 respectively.

[0090] Furthermore, a first feed check valve 50a is provided between the first feed inlet 12a and the feed pipeline 30, for the material in the feed pipeline 30 to pass through the first feed inlet 12a in one direction and enter the cylinder 11 of the first plunger pump 10a.

[0091] A second feed check valve 50b is provided between the second feed inlet 12b and the feed pipeline 30, for the material in the feed pipeline 30 to pass through the second feed inlet 12b in one direction and enter the cylinder 11 of the second plunger pump 10b.

[0092] Preferably, the first feed inlet 12a and the second feed inlet 12b are connected to the feed pipeline 30 through two feed branches, and the first feed check valve 50a and the second feed check valve 50b are respectively installed on the two feed branches; a main feed inlet 12 is provided in the middle of the feed pipeline 30.

[0093] Furthermore, a first feed check valve 50a is provided between the first discharge port 13a and the feed pipeline 40, for the material in the first plunger pump 10a to pass through the first discharge port 13a and enter the feed pipeline 40 in one direction.

[0094] A second feed check valve 50b is provided between the second discharge port 13b and the feed pipeline 40, so that the material in the second plunger pump 10b can pass through the second discharge port 13b and enter the feed pipeline 40 in one direction.

[0095] Preferably, the first discharge port 13a and the second discharge port 13b are respectively connected to the feed pipeline 40 through two feed branches, and the first feed check valve 50a and the second feed check valve 50b are respectively installed on the two feed branches; a main feed port is provided in the middle of the feed pipeline 40, and the main feed port is connected to the inlet of the filter press through a pipeline.

[0096] Furthermore, a reversing valve 8 is provided on the oil supply circuit 7. The inlet of the reversing valve 8 is connected to the outlet of the oil pump 6 through an oil circuit. The two outlets of the reversing valve 8 are respectively connected to the rodless chamber (or rod chamber) of the first hydraulic cylinder 110 and the second hydraulic cylinder 120, for selectively supplying oil to the first hydraulic cylinder 110 or the second hydraulic cylinder 120.

[0097] Furthermore, the first hydraulic cylinder 110 and the second hydraulic cylinder 120 are provided with oil return ports on the rod chamber (or rodless chamber) connected to the oil supply circuit 7, and the oil return ports are connected to the oil tank through the oil return pipeline.

[0098] When the oil supply line supplies oil to one of the first hydraulic cylinder 110 and the second hydraulic cylinder 120, the other of the first hydraulic cylinder 110 and the second hydraulic cylinder 120 returns the hydraulic oil in its rod chamber (or rodless chamber) back to the oil tank through the return oil line.

[0099] Furthermore, the controller 4 is connected to the oil pump 6 and the reversing valve 8 respectively, and is used to control the oil pump 6 to alternately supply oil to the first hydraulic cylinder 110 and the second hydraulic cylinder 120, so as to realize the alternating operation of the first plunger pump 10a and the second plunger pump 10b.

[0100] Preferably, the piston inside the piston cylinder is connected to a push rod extending from the hydraulic cylinder via a piston rod. More preferably, the piston rod of the piston cylinder and the push rod of the hydraulic cylinder are coaxially connected via a coupling.

[0101] Furthermore, the first hydraulic cylinder 110, the first plunger pump 10a, the second hydraulic cylinder 120, and the second plunger pump 10b are arranged vertically; or, the first hydraulic cylinder 110, the first plunger pump 10a, the second hydraulic cylinder 120, and the second plunger pump 10b are arranged horizontally. Therefore, the feed pump of this application can be a vertical or horizontal structure.

[0102] This invention achieves continuous material feeding by setting up two interconnected first hydraulic cylinders 110 and second hydraulic cylinders 120, enabling the two piston cylinders to work alternately without interruption. This greatly improves the material feeding speed.

[0103] Based on the above technical solution, and further preferably, the controller is a programmable logic controller (PLC); a level sensor and a temperature sensor are installed inside the oil tank to monitor the level and temperature of the hydraulic oil in the tank in real time, respectively. Both the level sensor and the temperature sensor are electrically connected to the PLC to provide real-time feedback of the hydraulic oil level and temperature signals in the hydraulic oil tank to the PLC.

[0104] Furthermore, the external electrical control box of the controller in this embodiment is equipped with green, red, and yellow indicator lights, all of which are electrically connected to the programmable logic controller. These three indicator lights are used to indicate various operating states of the feed pump. For example, a lit green indicator light indicates that the feed pump is in normal operation; a lit red indicator light indicates that the feed pump is stopped or in a fault state; and a lit yellow indicator light is used to warn of alarm messages such as low oil level and / or high oil temperature in the oil tank.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A plunger-type feed pump, characterized in that, include: Actuation components and plunger pump; The plunger pump includes: a cylinder body, a plunger, and an end cap; The end cap is disposed at the opening of the cylinder body, and the center of the end cap is provided with a guide hole that slides and guides the plunger. The plunger is cylindrical, and its inner end is slidably inserted into the cylinder body through the guide hole; The actuating component is connected to the outer end of the plunger and is used to drive the plunger to reciprocate. Two or more sealing rings are embedded in the inner wall of the end cap guide hole to seal the gap between the plunger and the guide hole; An oil reservoir is formed by the two adjacent sealing rings, the plunger, and the inner wall of the end cap guide hole. An external lubricating oil source is connected to the oil reservoir through a lubricating oil passage to supply lubricating oil into the oil reservoir and thus lubricate the plunger.

2. The plunger-type feed pump according to claim 1, characterized in that, The external lubricating oil source includes a lubricating pump and a lubricating oil tank. The two ends of the lubricating oil circuit are connected to the oil storage chamber and the lubricating oil tank, and the lubricating pump is installed on the lubricating oil circuit.

3. The plunger-type feed pump according to claim 2, characterized in that, The lubrication line is equipped with a control valve for controlling the opening and closing of the lubrication line; it also includes a controller, which is connected to the lubrication pump and the control valve, and achieves periodic oil supply to the oil storage chamber by controlling the timed opening of the lubrication pump and the control valve.

4. The plunger-type feed pump according to claim 1, characterized in that, The cylinder body is provided with a recessed platform at its opening; The end cap includes a main body and a guide sleeve; the guide sleeve is inserted into the annular space formed by the sinking platform.

5. The plunger-type feed pump according to claim 4, characterized in that, One or more of the sealing rings are embedded in the guide sleeve; one or more of the sealing rings are embedded in the main body.

6. The plunger-type feed pump according to claim 5, characterized in that, An oil storage cavity is provided at the connection between the main body and the guide sleeve, and an oil delivery hole is provided inside the main body to connect the inside and outside of the oil storage cavity.

7. The plunger-type feed pump according to claim 1, characterized in that, The bottom of the cylinder is provided with a feed inlet and a discharge outlet.

8. The plunger-type feed pump according to claim 1, characterized in that, The cylinder and plunger are made of ceramic material.

9. The plunger-type feed pump according to claim 1, characterized in that, Includes two sets of the aforementioned actuators and a plunger pump; The actuating component includes a first hydraulic cylinder and a second hydraulic cylinder; and also includes an oil pump; The plunger pump includes a first plunger pump and a second plunger pump; The first hydraulic piston in the first hydraulic cylinder is connected to the first working piston in the first piston pump, and is used to drive the first working piston to reciprocate within the first piston pump for operation; the second hydraulic piston in the second hydraulic cylinder is connected to the second working piston in the second piston pump, and is used to drive the second working piston to reciprocate within the second piston pump for operation. The first rod chamber of the first hydraulic cylinder and the second rod chamber of the second hydraulic cylinder are connected through an intermediate pipeline, and the oil pump is connected to the first rodless chamber of the first hydraulic cylinder and the second rodless chamber of the second hydraulic cylinder through an oil supply line; or, the first rodless chamber of the first hydraulic cylinder and the second rodless chamber of the second hydraulic cylinder are connected through an intermediate pipeline, and the oil pump is connected to the first rod chamber of the first hydraulic cylinder and the second rod chamber of the second hydraulic cylinder through an oil supply line; the oil pump alternately supplies oil to the first hydraulic cylinder and the second hydraulic cylinder through the oil supply line, thereby realizing the alternating operation of the first plunger pump and the second plunger pump.

10. The plunger-type feed pump according to claim 9, characterized in that, The first plunger pump cylinder body has a first inlet on one side and a first outlet on the other side; The second plunger pump cylinder body has a second inlet on one side and a second outlet on the other side; The first and second inlets are connected to the feed pipeline and are used to feed materials into the first and second plunger pumps, respectively. The first and second discharge ports are connected to the feed pipeline and are used to convey materials to the filter press through the feed pipeline, respectively.

11. The plunger-type feed pump according to claim 10, characterized in that, A first feed check valve is provided between the first feed inlet and the feed pipeline, so that the material in the feed pipeline can pass through the first feed inlet in one direction and enter the cylinder of the first plunger pump. A second feed check valve is provided between the second feed inlet and the feed pipeline, so that the material in the feed pipeline can pass through the second feed inlet in one direction and enter the cylinder of the second plunger pump.

12. The plunger-type feed pump according to claim 10, characterized in that, A first feed check valve is provided between the first discharge port and the feed pipeline, so that the material in the first plunger pump can pass through the first discharge port and enter the feed pipeline in one direction. A second feed check valve is provided between the second discharge port and the feed pipeline, so that the material in the second plunger pump can pass through the second discharge port and enter the feed pipeline in one direction.

13. The plunger-type feed pump according to claim 9, characterized in that, A reversing valve is provided on the oil supply line. The inlet of the reversing valve is connected to the outlet of the oil pump through an oil circuit. The two outlets of the reversing valve are respectively connected to the rodless chamber or the rod chamber of the first hydraulic cylinder and the second hydraulic cylinder, for selectively supplying oil to the first hydraulic cylinder or the second hydraulic cylinder.

14. The plunger-type feed pump according to claim 13, characterized in that, The first hydraulic cylinder and the second hydraulic cylinder are also provided with a return port on the rod-side or rodless side connected to the oil supply circuit. The return port is connected to the oil tank through a return pipeline.

15. The plunger-type feed pump according to claim 9, characterized in that, The first hydraulic cylinder, the first plunger pump, the second hydraulic cylinder, and the second plunger pump are arranged vertically. Alternatively, the first hydraulic cylinder, the first plunger pump, the second hydraulic cylinder, and the second plunger pump are arranged horizontally.

16. The plunger-type feed pump according to claim 3, characterized in that, The controller is a programmable logic controller; the oil tank is equipped with a level sensor and a temperature sensor, which are used to monitor the level and temperature of the hydraulic oil in the tank in real time.

17. The plunger-type feed pump according to claim 16, characterized in that, The controller has green, red, and yellow indicator lights on its external electrical control box. All three indicator lights are electrically connected to the programmable logic controller. The three indicator lights are used to indicate various operating states of the feed pump.

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