Feeding pump of filter press

Abstract

The utility model provides a feeding pump of a filter press. The feeding pump comprises an oil pump, a first execution assembly and a second execution assembly, the first execution assembly comprises a first hydraulic cylinder and a first piston cylinder; the second execution assembly comprises a second hydraulic cylinder and a second piston cylinder; a second hydraulic piston in the second hydraulic cylinder is connected with a second working piston in the second piston cylinder and is used for driving the second working piston to reciprocate in the second piston cylinder to work; the oil pump supplies oil to the first hydraulic cylinder and the second hydraulic cylinder alternately through the oil supply way, and then the first piston cylinder and the second piston cylinder work alternately. According to the utility model, the first hydraulic cylinder and the second hydraulic cylinder which are connected with each other are arranged, so that the two piston cylinders can continuously and alternately work, the feeding continuity is realized, and the feeding speed is greatly increased.

Description

Technical Field

[0001] This utility model relates to the field of pump technology for filter presses, and in particular to a filter press 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 for filter presses include slurry pumps and screw pumps. Slurry pumps use a motor to drive the impeller to deliver material to the filter press, while screw pumps use a motor to drive the screw to deliver material to the filter press. Both types of feed pumps are directly driven by the mechanical kinetic energy generated by the motor torque, resulting in relatively high energy consumption, high cost, and low efficiency. Utility Model Content

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

[0005] To solve the above-mentioned technical problems, this utility model provides a filter press feed pump, comprising: an oil pump, a first actuator, and a second actuator;

[0006] The first actuation component includes a first hydraulic cylinder and a first piston cylinder; the first hydraulic piston in the first hydraulic cylinder is connected to the first working piston in the first piston cylinder, and is used to drive the first working piston to reciprocate within the first piston cylinder to work.

[0007] The second actuation component includes a second hydraulic cylinder and a second piston cylinder; the second hydraulic piston in the second hydraulic cylinder is connected to the second working piston in the second piston cylinder, and is used to drive the second working piston to reciprocate within the second piston cylinder to work.

[0008] 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 piston cylinder and the second piston cylinder.

[0009] Furthermore, the rodless chamber inside the first piston cylinder is the first working chamber, and a first feed inlet is provided on one side of the first working chamber, and a first discharge outlet is provided on the other side;

[0010] The rodless chamber inside the second piston cylinder is the second working chamber. A second feed inlet is provided on one side of the second working chamber, and a second discharge outlet is provided on the other side.

[0011] The first and second inlets are connected to the feed pipeline and are used to feed materials into the first and second working chambers, respectively.

[0012] 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.

[0013] 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 first working chamber;

[0014] 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 second working chamber.

[0015] 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.

[0016] Furthermore, a first feed check valve is provided between the first discharge port and the feed pipeline, for the material in the first working chamber to pass through the first discharge port and enter the feed pipeline in one direction;

[0017] A second feed check valve is provided between the second discharge port and the feed pipeline, so that the material in the second working chamber can pass through the second discharge port and enter the feed pipeline in one direction.

[0018] 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.

[0019] 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 rod chamber or rodless 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.

[0020] 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.

[0021] 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.

[0022] Preferably, 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.

[0023] Furthermore, it also includes a controller, which 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 piston cylinder and the second piston cylinder.

[0024] 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.

[0025] Furthermore, the first execution component and the second execution component are arranged in parallel at intervals.

[0026] Furthermore, the first and second execution components are arranged vertically, that is, the first hydraulic cylinder, the first piston cylinder, the second hydraulic cylinder, and the second piston cylinder are arranged vertically.

[0027] Alternatively, the first and second execution components are arranged horizontally, that is, the first hydraulic cylinder, the first piston cylinder, the second hydraulic cylinder, and the second piston cylinder are arranged horizontally.

[0028] Therefore, the filter press feed pump of this application can be a vertical or horizontal structure.

[0029] Furthermore, the first piston cylinder and the second piston cylinder include a cylinder body and a hopper body that are separately configured; a working piston is slidably disposed inside the cylinder body; a piston rod fixedly connected to the working piston extends out from one end of the cylinder body; the hopper body is sealed and connected to the other end of the cylinder body; and an inlet and an outlet are respectively provided on the side wall of the hopper body.

[0030] Preferably, the inlet and outlet are respectively located on two opposite side walls of the silo section; in the height direction, the inlet and outlet are located in the upper middle part of the side wall of the silo section.

[0031] Furthermore, the hopper section is located on the rodless chamber side of the cylinder section. The pressure value inside the hopper section is adjusted by sliding the working piston, thereby realizing the feeding and discharging of materials. Preferably, the cylinder section is provided with a vent on the rod chamber side, that is, the rod chamber is connected to the atmosphere through the vent, thereby reducing the resistance of the working piston.

[0032] In this application, the cylinder body and the hopper are machined separately, which can greatly reduce the processing cost of the entire component. The cylinder body is an integral cylindrical structure with a sealed top, and the inner wall of the cylinder needs to be sealed to the working piston, which requires high machining accuracy and surface finish. The hopper, on the other hand, is a cylindrical body with a sealed bottom, and only the bottom and the part connected to the cylinder body need to be sealed.

[0033] Furthermore, the first piston cylinder and the second piston cylinder include: a cylinder body, a working piston, and an end cap; the end cap has a shaft hole at its center; the piston rod of the working piston extends out of the cylinder body from the shaft hole.

[0034] Furthermore, an oil injection port or nozzle is provided at the top or upper part of the rod chamber inside the cylinder. An external lubricating oil source is connected to the oil injection port or nozzle through a lubricating oil passage to inject lubricating oil into the rod chamber, thereby lubricating the working piston.

[0035] Furthermore, the external lubricating oil source includes a lubricating pump and a lubricating oil tank. The lubricating oil tank is connected to the oil spray port or nozzle through the lubricating oil circuit, and the lubricating pump is installed on the lubricating oil circuit.

[0036] Preferably, a control valve is provided in the lubricating oil circuit to control the opening and closing of the lubricating oil circuit.

[0037] Furthermore, the controller is connected to the lubrication pump and the control valve, and by controlling the timed opening of the lubrication pump and the control valve, periodic oil supply and lubrication of the working piston is achieved.

[0038] Furthermore, a sealing guide sleeve is inserted into the shaft hole; a guide hole is provided at the center of the sealing guide sleeve; the piston rod of the working piston extends out of the cylinder body from the guide hole; two or more sealing rings are embedded on the inner wall of the guide hole for sealing between the piston rod and the guide hole; an oil storage cavity is formed between two adjacent sealing rings, the piston rod and the inner wall of the guide hole, and an external lubricating oil source is connected to the oil storage cavity through a lubricating oil passage for supplying lubricating oil to the oil storage cavity to lubricate the piston rod.

[0039] The external lubricating oil source includes a lubricating pump and a lubricating oil tank; the lubricating pump is connected to the oil storage chamber through a lubricating oil circuit, and preferably, an oil valve is provided on the lubricating oil circuit to control the opening and closing of the lubricating oil circuit.

[0040] Furthermore, the controller is connected to the lubrication pump and the oil valve, and by controlling the timed opening of the lubrication pump and the oil valve, periodic oil supply and lubrication to the oil storage chamber is achieved.

[0041] By adopting the above technical solution, this utility model has the following beneficial effects:

[0042] The present invention provides a filter press feed pump, which achieves continuous feeding by setting two interconnected first hydraulic cylinders and second hydraulic cylinders, enabling the two piston cylinders to work alternately without interruption. This greatly improves the feeding speed. Attached Figure Description

[0043] 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.

[0044] Figure 1 Left view of the filter press feed pump provided in an embodiment of this utility model;

[0045] Figure 2 A front view of the filter press feed pump provided in an embodiment of this utility model;

[0046] Figure 3 A top view of the filter press feed pump provided in an embodiment of this utility model;

[0047] Figure 4 This is a schematic diagram of the piston cylinder in Embodiment 1 of this utility model;

[0048] Figure 5 This is a schematic diagram of the working piston lubrication system in Embodiment 2 of this utility model;

[0049] Figure 6 This is a schematic diagram of the piston cylinder in Embodiment 3 of this utility model;

[0050] Figure 7 for Figure 6 A magnified view of a portion of point A and a schematic diagram of the lubrication system.

[0051] Figure label:

[0052] 1-Sealing ring; 2-Lubricating oil tank; 3-Lubrication pump; 4-Controller; 5-Oil valve; 5a-Control valve; 10-Oil pump; 11-Oil supply line; 20-Feeding pipe; 30-Feeding pipe; 40-Directional valve; 50-Cylinder body; 50a-Piston cylinder; 51-Working piston; 52-Ventilation port; 53-End cover; 54-Piston rod; 55-Injector; 60-Hopper section; 70-Sealing guide sleeve; 71-Oil reservoir; 72-Lubricating oil line; 100-First actuator; 10-First hydraulic cylinder; 120-First piston cylinder; 121-First working chamber; 122-First feed inlet; 123-First discharge outlet; 124-First feed check valve; 125-First feed check valve; 150-Intermediate pipeline; 200-Second actuator; 210-Second hydraulic cylinder; 220-Second piston cylinder; 221-Second working chamber; 222-Second feed inlet; 223-Second discharge outlet; 224-Second feed check valve; 225-Second feed check valve. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] The present invention will be further explained below with reference to specific embodiments.

[0057] Example 1

[0058] like Figure 1-3 As shown, this embodiment provides a filter press feed pump, including: an oil pump 10, a first actuator 100, and a second actuator 200;

[0059] The first actuation component 100 includes a first hydraulic cylinder 110 and a first piston cylinder 120; the first hydraulic cylinder 110 and the first piston cylinder 120 are coaxially arranged, and a first hydraulic piston (not shown) in the first hydraulic cylinder 110 is connected to a first working piston (not shown) in the first piston cylinder 120, for driving the first working piston to reciprocate within the first piston cylinder 120 to work; the second actuation component 200 includes a second hydraulic cylinder 210 and a second piston cylinder 220; a second hydraulic piston (not shown) in the second hydraulic cylinder 210 is connected to a second working piston (not shown) in the second piston cylinder 220, for driving the second working piston to reciprocate within the second piston cylinder 220 to work;

[0060] See Figure 1 As shown, the first rod chamber of the first hydraulic cylinder 110 and the second rod chamber of the second hydraulic cylinder 210 are connected by an intermediate pipeline 150. The oil pump 10 is connected to the first rodless chamber of the first hydraulic cylinder 110 and the second rodless chamber of the second hydraulic cylinder 210 respectively through the oil supply line 11. The oil pump 10 alternately supplies oil to the first hydraulic cylinder 110 and the second hydraulic cylinder 210 through the oil supply line 11, thereby realizing the alternating operation of the first piston cylinder 120 and the second piston cylinder 220.

[0061] Alternatively, the first rodless chamber of the first hydraulic cylinder 110 and the second rodless chamber of the second hydraulic cylinder 210 can be connected via an intermediate pipeline 150, and the oil pump 10 can be connected via an oil supply line 11 to the first rod chamber of the first hydraulic cylinder 110 and the second rod chamber of the second hydraulic cylinder 210, respectively; similarly, the first piston cylinder 120 and the second piston cylinder 220 can work alternately.

[0062] See Figure 2 As shown, the rodless chamber in the first piston cylinder 120 is the first working chamber 121, with a first feed inlet 122 on one side and a first discharge outlet 123 on the other side. The rodless chamber in the second piston cylinder 220 is the second working chamber 221, with a second feed inlet 222 on one side and a second discharge outlet 223 on the other side.

[0063] The first inlet 122 and the second inlet 222 are connected to the feed pipeline 20 and are used to input materials into the first working chamber 121 and the second working chamber 221 respectively; the first outlet 123 and the second outlet 223 are connected to the feed pipeline 30 and are used to transport materials to the filter press through the feed pipeline 30.

[0064] Furthermore, a first feed check valve 124 is provided between the first feed inlet 122 and the feed pipeline 20, for the material in the feed pipeline 20 to pass through the first feed inlet 122 in one direction and enter the first working chamber 121;

[0065] A second feed check valve 224 is provided between the second feed inlet 222 and the feed pipeline 20, so that the material in the feed pipeline 20 can pass through the second feed inlet 222 in one direction and enter the second working chamber 221.

[0066] Preferably, the first feed inlet 122 and the second feed inlet 222 are connected to the feed pipeline 20 through two feed branches, and the first feed check valve 124 and the second feed check valve 224 are respectively provided on the two feed branches; a main feed inlet is provided in the middle of the feed pipeline 20.

[0067] Furthermore, a first feed check valve 125 is provided between the first discharge port 123 and the feed pipeline 30, for the material in the first working chamber 121 to pass through the first discharge port 123 and enter the feed pipeline 30 in one direction;

[0068] A second feed check valve 225 is provided between the second discharge port 223 and the feed pipeline 30, so that the material in the second working chamber 221 can enter the feed pipeline 30 in one direction through the second discharge port 223.

[0069] In this embodiment, the first discharge port 123 and the second discharge port 223 are connected to the feed pipeline 30 through two feed branches, and the first feed check valve 125 and the second feed check valve 225 are respectively installed on the two feed branches; a main feed port is provided in the middle of the feed pipeline 30, and the main feed port is connected to the inlet of the filter press through a pipeline.

[0070] Furthermore, a reversing valve 40 is provided on the oil supply circuit 11. The inlet of the reversing valve 40 is connected to the outlet of the oil pump 10 via an oil circuit. The two outlets of the reversing valve 40 are respectively connected to the rodless chamber (or rod chamber) of the first hydraulic cylinder 110 and the second hydraulic cylinder 210, for selectively supplying oil to either the first hydraulic cylinder 110 or the second hydraulic cylinder 210. The rodless chamber (or rod chamber) of the first hydraulic cylinder 110 and the second hydraulic cylinder 210 connected to the oil supply circuit 11 is also provided with an oil return port (not shown), which is connected to the oil tank (not shown) via a return pipeline.

[0071] When the oil supply line supplies oil to one of the first hydraulic cylinder 110 and the second hydraulic cylinder 210, the other of the first hydraulic cylinder 110 and the second hydraulic cylinder 210 discharges the hydraulic oil in its rodless chamber (or rod chamber) back to the oil tank through the return oil line.

[0072] This embodiment also includes a controller (not shown), which is connected to the oil pump 10 and the reversing valve 40 respectively, and is used to control the oil pump 10 to alternately supply oil to the first hydraulic cylinder 110 and the second hydraulic cylinder 210, so as to realize the alternating operation of the first piston cylinder 120 and the second piston cylinder 220.

[0073] Preferably, the pistons in the first piston cylinder 120 and the second piston cylinder 220 are connected to push rods extending from the first hydraulic cylinder 110 and the second hydraulic cylinder 210 via piston rods. More preferably, the piston rods of the piston cylinders and the push rods of the hydraulic cylinders are coaxially connected via couplings.

[0074] Furthermore, the first actuating component 100 and the second actuating component 200 are arranged in parallel at intervals. Alternatively, the first actuating component 100 and the second actuating component 200 are arranged vertically, i.e., the first hydraulic cylinder 110, the first piston cylinder 120, the second hydraulic cylinder 210, and the second piston cylinder 220 are arranged vertically; or, the first actuating component 100 and the second actuating component 200 are arranged horizontally, i.e., the first hydraulic cylinder 110, the first piston cylinder 120, the second hydraulic cylinder 210, and the second piston cylinder 220 are arranged horizontally. Therefore, the filter press feed pump of this application can be a vertical or horizontal structure.

[0075] See Figure 4 As shown, the first piston cylinder 120 and the second piston cylinder 220 include a cylinder body 50 and a hopper 60 that are separately arranged; a working piston 51 is slidably arranged inside the cylinder body 50; a piston rod fixedly connected to the working piston 51 extends out from one end of the cylinder body 50; the hopper 60 is sealed to the other end of the cylinder body 50; an inlet and an outlet are respectively provided on the side wall of the hopper 60.

[0076] Preferably, the inlet and outlet are respectively located on two opposite side walls of the hopper section 60; in the height direction, the inlet and outlet are located in the upper middle part of the side wall of the hopper section 60.

[0077] The hopper section 60 is located on the rodless chamber side of the cylinder section 50. The pressure value inside the hopper section 60 is adjusted by sliding the working piston 51, thereby realizing the feeding and discharging of materials. Preferably, the cylinder section 50 is provided with a vent 52 on the rod chamber side, that is, the rod chamber is connected to the atmosphere through the vent 52, thereby reducing the resistance of the working piston.

[0078] In this application, the cylinder body 50 and the hopper 60 are machined separately, which can greatly reduce the processing cost of the entire component. The cylinder body 50 is an integral cylindrical structure with a sealed upper end. The inner wall of the cylinder needs to be sealed to the working piston, and its machining accuracy and surface finish requirements are high. The hopper 60 is a cylindrical body with a sealed bottom, and it is only necessary to ensure the sealing of the bottom and the part connected to the cylinder body 50.

[0079] This invention achieves continuous material feeding by setting up two interconnected first hydraulic cylinders 110 and second hydraulic cylinders 210, enabling the two piston cylinders to work alternately without interruption. This greatly improves the material feeding speed.

[0080] Preferably, based on the above technical solution, 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. The controller is a programmable logic controller.

[0081] Furthermore, the electrical control box outside the controller in this embodiment is equipped with green, red, and yellow indicator lights, all of which are electrically connected to the 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 faulty 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.

[0082] Example 2

[0083] See Figure 5 As shown, this embodiment is basically the same as embodiment 1, except that:

[0084] The first piston cylinder 120 and the second piston cylinder 220 include: a piston cylinder body 50a, a working piston 51 and an end cap 53; the end cap 53 has a shaft hole at its center; the piston rod of the working piston 51 extends out of the cylinder body 50a from the shaft hole.

[0085] An oil injection port or nozzle 55 is provided on the top or upper part of the rod chamber inside the cylinder block 50a; the oil injection port or nozzle 55 is preferably located at the bottom of the end cover 53, or on the upper part of the side wall of the rod chamber. An external lubricating oil source is connected to the oil injection port or nozzle 55 through a lubricating oil passage to spray lubricating oil into the rod chamber, thereby lubricating the working piston 51.

[0086] The external lubricating oil source includes a lubrication pump 3 and a lubrication oil tank 2. The lubrication oil tank 2 is connected to the oil spray port or nozzle 55 via a lubrication oil circuit, and the lubrication pump 3 is installed on the lubrication oil circuit. Preferably, a control valve 5a is installed on the lubrication oil circuit to control the opening and closing of the lubrication oil circuit.

[0087] The controller 4 is connected to the lubrication pump 3 and the control valve 5a. By controlling the timed opening of the lubrication pump 3 and the control valve 5a, the controller can periodically supply oil to lubricate the working piston 51.

[0088] This embodiment provides better lubrication, ensuring that the working piston 51 is adequately lubricated during operation, preventing jamming, and improving work efficiency and effectiveness.

[0089] Example 3

[0090] See Figure 6 and Figure 7 As shown, this embodiment is basically the same as embodiment 1 or 2, except that:

[0091] A sealing guide sleeve 70 is inserted into the shaft hole; a guide hole is provided in the center of the sealing guide sleeve 70; the piston rod 54 of the working piston 51 extends out of the piston cylinder 50a from the guide hole; two or more sealing rings 1 are embedded in the inner wall of the guide hole for sealing between the piston rod 54 and the guide hole; at least one pair of adjacent sealing rings 1, the piston rod 54 and the inner wall of the guide hole enclose an oil storage cavity 71, and an external lubricating oil source is connected to the oil storage cavity 71 through the lubricating oil passage 72 for supplying lubricating oil to the oil storage cavity 71 to lubricate the piston rod 54.

[0092] The external lubricating oil source includes a lubrication pump 3 and a lubricating oil tank 2. The lubrication oil passage 72 connects the oil storage chamber 71 and the lubricating oil tank 2 at both ends, and the lubrication pump 3 is mounted on the lubrication oil passage 72. Preferably, an oil valve 5 is provided on the lubrication oil passage 72 to control its opening and closing. A controller 4 is connected to the lubrication pump 3 and the oil valve 5, and by controlling the timed opening and closing of the lubrication pump 3 and the oil valve 5, periodic oil supply to the oil storage chamber 71 is achieved. This embodiment provides better lubrication, ensuring that the piston rod 54 receives sufficient lubrication during operation, preventing jamming, and improving work efficiency and effectiveness.

[0093] 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 filter press feed pump, characterized in that, include: Oil pump, first actuator and second actuator; The first actuation component includes a first hydraulic cylinder and a first piston cylinder; the first hydraulic piston in the first hydraulic cylinder is connected to the first working piston in the first piston cylinder, and is used to drive the first working piston to reciprocate within the first piston cylinder to work. The second actuation component includes a second hydraulic cylinder and a second piston cylinder; the second hydraulic piston in the second hydraulic cylinder is connected to the second working piston in the second piston cylinder, and is used to drive the second working piston to reciprocate within the second piston cylinder to work. The first rod chamber of the first hydraulic cylinder and the second rod chamber of the second hydraulic cylinder are connected by 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 respectively 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 by 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 respectively 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 piston cylinder and the second piston cylinder; The rodless chamber inside the first piston cylinder is the first working chamber. A first feed inlet is provided on one side of the first working chamber, and a first discharge outlet is provided on the other side. The rodless chamber inside the second piston cylinder is the second working chamber. A second feed inlet is provided on one side of the second working chamber, and a second discharge outlet is provided 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 working chambers, 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. 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 rod chamber or rodless 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.

2. The filter press feed pump according to claim 1, 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 first working chamber. 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 second working chamber.

3. The filter press feed pump according to claim 1, 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 working chamber 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 working chamber can pass through the second discharge port and enter the feed pipeline in one direction.

4. The filter press feed pump according to claim 1, 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.

5. The filter press feed pump according to claim 4, characterized in that, 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.

6. The filter press feed pump according to claim 1, characterized in that, It also includes a controller, which 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 piston cylinder and the second piston cylinder.

7. The filter press feed pump according to claim 1, characterized in that, The first execution component and the second execution component are arranged in parallel at intervals.

8. The filter press feed pump according to claim 1, characterized in that, The first and second execution components are arranged vertically, that is, the first hydraulic cylinder, the first piston cylinder, the second hydraulic cylinder, and the second piston cylinder are arranged vertically. Alternatively, the first and second execution components are arranged horizontally, that is, the first hydraulic cylinder, the first piston cylinder, the second hydraulic cylinder, and the second piston cylinder are arranged horizontally.

9. The filter press feed pump according to claim 1, characterized in that, The first piston cylinder and the second piston cylinder include a cylinder body and a hopper body that are separately arranged; a working piston is slidably arranged inside the cylinder body; a piston rod that is fixedly connected to the working piston extends out from one end of the cylinder body; the hopper body is sealed and connected to the other end of the cylinder body; an inlet and an outlet are respectively provided on the side wall of the hopper body.

10. The filter press feed pump according to claim 9, characterized in that, The feed inlet and discharge outlet are respectively located on two opposite side walls of the silo section; in the height direction, the feed inlet and discharge outlet are located in the upper middle part of the side wall of the silo section.

11. The filter press feed pump according to claim 9, characterized in that, The hopper section is located on the rodless chamber side of the cylinder section; the cylinder section has a vent on the rod chamber side, through which the rod chamber communicates with the atmosphere, thereby reducing the resistance of the working piston.

12. The filter press feed pump according to claim 6, characterized in that, The first piston cylinder and the second piston cylinder include: a cylinder body, a working piston and an end cap; the end cap has a shaft hole at its center; the piston rod of the working piston extends out of the cylinder body from the shaft hole.

13. The filter press feed pump according to claim 12, characterized in that, An oil injection port or nozzle is provided at the top or upper part of the rod chamber inside the cylinder. An external lubricating oil source is connected to the oil injection port or nozzle through a lubricating oil passage to inject lubricating oil into the rod chamber, thereby lubricating the working piston.

14. The filter press feed pump according to claim 13, characterized in that, The external lubricating oil source includes a lubricating pump and a lubricating oil tank. The lubricating oil tank is connected to the oil spray port or nozzle through the lubricating oil circuit, and the lubricating pump is installed on the lubricating oil circuit.

15. The filter press feed pump according to claim 14, characterized in that, A control valve is installed on the lubrication oil circuit to control the opening and closing of the lubrication oil circuit.

16. The filter press feed pump according to claim 15, characterized in that, The controller is connected to the lubrication pump and the control valve, and by controlling the timed opening of the lubrication pump and the control valve, the working piston is periodically supplied with oil for lubrication.

17. The filter press feed pump according to claim 13, characterized in that, A sealing guide sleeve is inserted into the shaft hole; a guide hole is provided in the center of the sealing guide sleeve; the piston rod of the working piston extends out of the cylinder body from the guide hole; two or more sealing rings are embedded in the inner wall of the guide hole for sealing between the piston rod and the guide hole; an oil storage cavity is formed between two adjacent sealing rings, the piston rod and the inner wall of the guide hole, and an external lubricating oil source is connected to the oil storage cavity through a lubricating oil passage for supplying lubricating oil to the oil storage cavity to lubricate the piston rod.

18. The filter press feed pump according to claim 17, characterized in that, The external lubricating oil source includes a lubricating pump and a lubricating oil tank; the lubricating pump is connected to the oil storage chamber through a lubricating oil circuit, and an oil valve is provided on the lubricating oil circuit to control the opening and closing of the lubricating oil circuit.

19. The filter press feed pump according to claim 18, characterized in that, The controller is connected to the lubrication pump and the oil valve, and by controlling the timed opening of the lubrication pump and the oil valve, it realizes the periodic oil supply and lubrication of the oil storage chamber.

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