Feeding pump of horizontal filter press

Abstract

The utility model provides a feeding pump of a horizontal filter press, which relates to the technical field of pumps special for filter presses and comprises a hydraulic cylinder, a piston cylinder, a feeding pipe and a material pumping pipe, a push rod of the hydraulic cylinder is connected with a piston rod of the piston cylinder to drive the piston rod to linearly reciprocate; the feeding pipe is respectively communicated with a rod cavity and a rodless cavity of the piston cylinder through a feeding tee joint; a first check valve and a second check valve are respectively connected between the feeding tee joint and the rod cavity and the rodless cavity of the piston cylinder, and are used for unidirectionally flowing materials into the rod cavity and the rodless cavity of the piston cylinder from the feeding pipe; the material pumping pipe is vertically arranged, and the upper end of the material pumping pipe is respectively communicated with a rod cavity and a rodless cavity of the piston cylinder through a discharging tee joint; and a third check valve and a fourth check valve are respectively connected between the discharging tee joint and the rod cavity and the rodless cavity of the piston cylinder, and are used for discharging materials in the rod cavity and the rodless cavity of the piston cylinder from the material pumping pipe in a one-way manner. Hydraulic driving is adopted, and more energy is saved; the lower discharging mode avoids impurity deposition and reduces abrasion.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of filter press special pump especially relates to a horizontal filter press feeding pump. BACKGROUND

[0002] The filter press is a commonly used solid-liquid separation mechanical equipment, through to solid-liquid mixed material exert certain pressure, so that the liquid material in solid-liquid mixed material dialysis, and solid material separation.The filter press is used for processing slag slurry, slurry and other solid-liquid mixed material, this kind of material usually high viscosity, poor flowability, therefore need to equip the special feeding pump to the filter press and pump material when using the filter press to handle material.

[0003] At present, the common filter press special pump includes slag slurry pump and screw pump, wherein the slag slurry pump is driven by motor and sends material to the filter press through the slag slurry pump impeller, and the screw pump is driven by motor and sends material to the filter press through screw, the above-mentioned two feeding pumps are directly driven by mechanical energy generated by motor torque, and the energy consumption is relatively large, and the cost is high; and the discharge mode of the existing filter press special pump usually adopts side discharge mode, and the discharge mode has certain defects, when pumping the material containing more hard impurities, the hard impurities in the material can not be discharged in time due to gravity sinking, and then the piston, sealing ring and material cylinder are abraded. SUMMARY

[0004] The utility model aims at providing a horizontal filter press feeding pump to solve at least one above-mentioned technical problem in prior art.

[0005] To solve the above technical problem, the utility model provides a horizontal filter press feeding pump, which comprises a hydraulic cylinder, a piston cylinder, a feeding pipe and a pump pipe.

[0006] The push rod of the hydraulic cylinder is connected with the piston rod of the piston cylinder, for driving the piston rod to reciprocate linearly, and then driving the pump piston in the piston cylinder to reciprocate linearly, forcing the rod cavity and the rodless cavity of the piston cylinder to reciprocate and switch to circulate feeding and discharging.

[0007] The feeding pipe is communicated with the rod cavity and the rodless cavity of the piston cylinder through a feeding tee joint, the feeding pipe is communicated with the inlet of the feeding tee joint, for the rod cavity or the rodless cavity of the piston cylinder to feed from the feeding pipe.

[0008] A first check valve is connected between the first outlet of the feeding tee and the rod cavity of the piston cylinder, the inlet of the first check valve is communicated with the first outlet of the feeding tee, the outlet of the first check valve is communicated with the rod cavity of the piston cylinder, for unidirectional flow of the material from the feeding pipe to the rod cavity of the piston cylinder, preventing the material in the rod cavity of the piston cylinder from being discharged from the feeding pipe through the first check valve;

[0009] A second check valve is connected between the second outlet of the feeding tee and the rodless cavity of the piston cylinder, the inlet of the second check valve is communicated with the second outlet of the feeding tee, the outlet of the second check valve is communicated with the rodless cavity of the piston cylinder, for unidirectional flow of the material from the feeding pipe to the rodless cavity of the piston cylinder, preventing the material in the rodless cavity of the piston cylinder from being discharged from the feeding pipe through the second check valve;

[0010] The pump pipe is vertically arranged, the upper end inlet of the pump pipe is communicated with the rod cavity and the rodless cavity of the piston cylinder through the discharging tee respectively, the upper end inlet of the pump pipe is communicated with the outlet of the discharging tee, and the lower end outlet of the pump pipe is communicated with the feeding inlet of the filter press, for downward conveying of the material in the rod cavity or the rodless cavity of the piston cylinder from the pump pipe into the filter press;

[0011] A third check valve is connected between the rod cavity of the piston cylinder and the first inlet of the discharging tee, the inlet of the third check valve is communicated with the rod cavity of the piston cylinder, and the outlet of the third check valve is communicated with the first inlet of the discharging tee, for unidirectional discharge of the material in the rod cavity of the piston cylinder from the pump pipe, preventing the material from flowing into the rod cavity of the piston cylinder from the pump pipe through the third check valve;

[0012] A fourth check valve is connected between the rodless cavity of the piston cylinder and the second inlet of the discharging tee, the inlet of the fourth check valve is communicated with the rodless cavity of the piston cylinder, and the outlet of the fourth check valve is communicated with the second inlet of the discharging tee, for unidirectional discharge of the material in the rodless cavity of the piston cylinder from the pump pipe, preventing the material from flowing into the rodless cavity of the piston cylinder from the pump pipe through the fourth check valve.

[0013] The hydraulic cylinder pushes the piston rod out of the piston cylinder through the push rod, and then pulls the pump piston in the piston cylinder through the piston rod, and forces the material in the piston cylinder to be pumped out through the third check valve from the pump pipe; at the same time, the volume of the piston cylinder increases, the pressure decreases, the fourth check valve is closed, and the second check valve is opened, so that the piston cylinder sucks the material from the feed pipe.

[0014] The hydraulic cylinder pushes the piston rod out of the piston cylinder through the push rod, and then pulls the pump piston in the piston cylinder through the piston rod, and forces the material in the piston cylinder to be pumped out through the third check valve from the pump pipe; at the same time, the volume of the piston cylinder increases, the pressure decreases, the fourth check valve is closed, and the second check valve is opened, so that the piston cylinder sucks the material from the feed pipe.

[0015] The hydraulic cylinder pushes the piston rod out of the piston cylinder through the push rod, and then pulls the pump piston in the piston cylinder through the piston rod, and forces the material in the piston cylinder to be pumped out through the third check valve from the pump pipe; at the same time, the volume of the piston cylinder increases, the pressure decreases, the fourth check valve is closed, and the second check valve is opened, so that the piston cylinder sucks the material from the feed pipe.

[0016] Further, the first oil port is arranged on the cavity wall of the first cavity of the hydraulic cylinder, for supplying oil into the first cavity of the hydraulic cylinder or discharging hydraulic oil in the first cavity of the hydraulic cylinder.

[0017] The second oil port is arranged on the cavity wall of the second cavity of the hydraulic cylinder, for discharging hydraulic oil in the second cavity of the hydraulic cylinder or supplying oil into the second cavity of the hydraulic cylinder.

[0018] The hydraulic cylinder is a double-rod hydraulic cylinder, and the hydraulic piston in the hydraulic cylinder is provided with a push rod on the first cavity side and the second cavity side, which are a first push rod and a second push rod, respectively.

[0019] Further, the horizontal filter press feed pump further comprises a hydraulic oil tank, a hydraulic pump, an electromagnetic reversing valve, an oil supply oil path, an oil return oil path, a first oil path and a second oil path.

[0020] The hydraulic oil tank is communicated with the P port of the electromagnetic reversing valve through the oil supply oil way, and is communicated with the T port of the electromagnetic reversing valve through the oil return oil way.

[0021] The A port of the electromagnetic reversing valve is communicated with the first oil port of the first cavity of the hydraulic cylinder through the first oil way, and the B port of the electromagnetic reversing valve is communicated with the second oil port of the second cavity of the hydraulic cylinder through the second oil way.

[0022] The hydraulic pump is connected on the oil supply oil way, the oil inlet of the hydraulic pump is communicated with the hydraulic oil tank, the oil outlet of the hydraulic pump is communicated with the P port of the electromagnetic reversing valve, the hydraulic pump is driven by the motor, is used for pumping the hydraulic oil in the hydraulic oil tank into the hydraulic cylinder, and converts mechanical energy into hydraulic energy (i.e. pressure energy of the hydraulic oil) with higher energy density to drive the hydraulic cylinder, thereby reducing energy consumption.

[0023] The first cavity and the second cavity of the hydraulic cylinder are selectively connected with the hydraulic pump and the hydraulic oil tank respectively through the electromagnetic reversing valve, and are used for switching the oil inlet and the oil return of the first cavity and the second cavity of the hydraulic cylinder.

[0024] Further, the horizontal pressure filter feeding pump further comprises a cooling oil way and an air cooler.

[0025] One end of the cooling oil way is communicated with the oil return oil way, and the other end is communicated with the hydraulic oil tank.

[0026] The air cooler is connected on the cooling oil way, and is used for cooling the hydraulic oil by air cooling.

[0027] Preferably, the air cooler is installed on the side of the hydraulic oil tank.

[0028] Preferably, the hydraulic pump and the motor are installed on the hydraulic oil tank, the output shaft of the motor is connected with the input shaft of the hydraulic pump, and the hydraulic pump and the motor are arranged in parallel or in line with the hydraulic cylinder.

[0029] Preferably, an oil filling port is arranged on the hydraulic oil tank, and the hydraulic oil tank is used for supplementing the hydraulic oil from the oil filling port.

[0030] Further, the horizontal pressure filter feeding pump further comprises a connecting frame, the connecting frame is installed on the hydraulic oil tank, and the hydraulic cylinder and the piston cylinder are respectively installed at two ends of the connecting frame.

[0031] Further, the rod cavity of the piston cylinder is fixed on the side plate of the connecting frame through a guide sleeve flange, the piston rod is slidably arranged in the guide sleeve flange, and the guide sleeve flange is used for guiding the piston rod.

[0032] Further, the horizontal filter press feeding pump further comprises a lubricating oil tank, an electric lubricating oil pump and a lubricating oil path;

[0033] The sealing ring in the flange of the guide sleeve communicates with the sealing ring of the piston rod to form a closed space, and the flange of the guide sleeve is provided with a lubricating oil hole which communicates with the sealing ring of the piston rod;

[0034] The lubricating oil tank communicates with the lubricating oil hole through the lubricating oil path, and the electric lubricating oil pump is connected to the lubricating oil path, so that the lubricating oil in the lubricating oil tank is pumped from the lubricating oil path to the lubricating oil hole, and then the lubricating oil provides lubrication between the sealing ring in the flange of the guide sleeve and the sealing ring of the piston rod, and since a closed space is formed between the sealing ring in the flange of the guide sleeve and the sealing ring of the piston rod, the leakage and waste of lubricating oil and the pollution to the environment are effectively avoided.

[0035] Further, the second push rod of the hydraulic cylinder and the piston rod of the piston cylinder are connected through a shaft coupling;

[0036] The shaft coupling is connected to the second push rod in a threaded manner;

[0037] The shaft coupling is provided with an inner ball head base near one end of the piston rod, and the end of the piston rod is provided with a ball head, so that the piston rod is connected to the inner ball head base of the shaft coupling through the ball head to realize universal ball joint connection, effectively solving the problem of sealing ring wear caused by the cumulative deviation of the mutual connection of the hydraulic cylinder, the shaft coupling, the piston cylinder and the connecting frame, and freely absorbing the shape and position deviation through the universal ball joint connection mode to reduce the wear of the sealing ring of the guide sleeve flange.

[0038] Further, the horizontal filter press feeding pump further comprises an electric control box, and a programmable logic controller (PLC) is arranged in the electric control box for automatic control of the horizontal filter press feeding pump;

[0039] The programmable logic controller is electrically connected with the motor for controlling the operation and stop of the motor and receiving the operation and stop signals of the motor;

[0040] A liquid level sensor and a temperature sensor are arranged in the hydraulic oil tank for real-time monitoring of the liquid level and temperature of the hydraulic oil in the hydraulic oil tank;

[0041] The liquid level sensor and the temperature sensor are electrically connected with the programmable logic controller for real-time feedback of the liquid level and temperature signals of the hydraulic oil in the hydraulic oil tank to the programmable logic controller;

[0042] The electric control box is provided with green, red and yellow indicator lights, and the three indicator lights are electrically connected with the programmable logic controller;

[0043] The green indicator light is used to indicate that the horizontal pressure filter feeding pump is in normal operation state by lighting up.

[0044] The red indicator light is used to indicate that the horizontal pressure filter feeding pump is in shutdown or failure state by lighting up.

[0045] The yellow indicator light is used to warn that the oil level in the hydraulic oil tank is too low and / or the oil temperature is too high by lighting up.

[0046] When the motor is running, the programmable logic controller receives a motor running signal, and the programmable logic controller controls the green indicator light to light up.

[0047] When the motor stops, the programmable logic controller receives a motor stop signal, and the programmable logic controller controls the red indicator light to light up.

[0048] When the liquid level sensor detects that the liquid level of the hydraulic oil in the hydraulic oil tank is lower than the preset alarm liquid level, the programmable logic controller receives the liquid level signal sent by the liquid level sensor and alarms, and the programmable logic controller controls the yellow indicator light to light up to warn that the hydraulic pump head may be worn out due to hydraulic oil leakage.

[0049] When the temperature sensor detects that the temperature of the hydraulic oil in the hydraulic oil tank is higher than the preset alarm temperature, the programmable logic controller receives the temperature signal sent by the liquid level sensor and alarms, and the programmable logic controller controls the yellow indicator light to light up to warn.

[0050] The present application realizes visual management by setting indicator lights. When the horizontal pressure filter feeding pump is arranged away from the pressure filter, the on-site operator can distinguish the running state of the horizontal pressure filter feeding pump by observing the color of the indicator light from a distance, without moving to the front of the horizontal pressure filter feeding pump, thereby reducing labor intensity and improving work efficiency.

[0051] Preferably, the hydraulic cylinder is provided with a displacement sensor for real-time monitoring of the displacement of the hydraulic cylinder push rod.

[0052] The displacement sensor is electrically connected with the programmable logic controller for real-time feedback of the displacement signal of the push rod to the programmable logic controller.

[0053] When the displacement sensor detects that the displacement of the push rod is not within the preset safe displacement range, the programmable logic controller triggers a fault indication after receiving the displacement signal sent by the displacement sensor, and the programmable logic controller controls the red indicator light to turn on to warn; otherwise, the green indicator light turns on.

[0054] Preferably, the programmable logic controller is electrically connected with the electric lubricating oil pump for setting the oil pumping interval length and the single oil pumping length of the electric lubricating oil pump, thereby controlling the electric lubricating oil pump to pump lubricating oil in a timed and quantitative manner according to the oil pumping interval length and the single oil pumping length, effectively avoiding the aggravation of the wear of the sealing ring caused by manual operation forgetting.

[0055] Preferably, the programmable logic controller is electrically connected with the pressure sensor of the filter press for receiving the pressure state in the filter press.

[0056] The programmable logic controller is electrically connected with the motor of the hydraulic pump and the electromagnetic reversing valve for linkage control of the operation of the hydraulic pump and the reversing of the electromagnetic reversing valve, thereby controlling the hydraulic cylinder to drive the piston cylinder to reciprocatingly pump material until the filter press is filled to the rated pressure state.

[0057] Preferably, the electric control box is provided with a circuit control system composed of the programmable logic controller, a power supply, a thermal overload protector, and circuit control switches such as electromagnetic relays and solid-state relays, which are connected by circuits, for controlling the horizontal filter press feeding pump.

[0058] The power supply is used for power supply of the horizontal filter press feeding pump.

[0059] The thermal overload protector is used for thermal overload protection of the horizontal filter press feeding pump, and performs circuit protection when the current is too large or the current temperature is too high.

[0060] Preferably, the electric control box is further provided with a touch screen, which is electrically connected with the programmable logic controller for manual touch screen control of the programmable logic controller and display of received signal data.

[0061] Preferably, the programmable logic controller mainly includes a processor, a memory, and a bus, the memory stores instructions and data read by the processor, the processor is used for calling the instructions and data in the memory, and the bus is connected between each functional component for transmitting information.

[0062] The achievable functions of the programmable logic controller include but are not limited to:

[0063] The pressure signal of the pressure sensor of the filter press is received to linkage control the motor to drive the hydraulic pump to operate and the electromagnetic reversing valve to reverse.

[0064] The system receives the motor start or stop signal and the displacement signal from the displacement sensor to control the green or red indicator light to turn on or off.

[0065] The system receives the liquid level signal from the liquid level sensor and the temperature signal from the temperature sensor to control the yellow indicator light to turn on or off.

[0066] The electric lubricating oil pump is controlled to pump lubricating oil at set intervals and pumping times according to the set pumping interval and pumping time.

[0067] By adopting the above technical solution, this utility model has the following beneficial effects:

[0068] This utility model provides a horizontal filter press feed pump that connects the push rod of a hydraulic cylinder to the piston rod of a piston cylinder. Hydraulic transmission drives the piston rod to push and pull the pump piston in the piston cylinder, causing the pump piston to reciprocate linearly within the piston cylinder. This forces the rod chamber and rodless chamber of the piston cylinder to switch back and forth for cyclic feeding and discharging. Compared with existing feed pumps of the same flow rate, this method can save 28% to 70% of energy. The vertically arranged pump pipe and downward discharge method effectively prevent hard impurities in the material from sinking due to gravity and failing to be discharged in time, thus avoiding wear on the pump piston, sealing ring, and piston cylinder. Attached Figure Description

[0069] 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.

[0070] Figure 1 A front perspective view of the feed pump for a horizontal filter press provided in an embodiment of this utility model;

[0071] Figure 2 for Figure 1 The rear-view perspective view of the feed pump of the horizontal filter press shown;

[0072] Figure 3 for Figure 1 The front view of the feed pump for the horizontal filter press shown;

[0073] Figure 4 for Figure 1 The rear view of the feed pump of the horizontal filter press shown;

[0074] Figure 5 for Figure 1 The top view of the feed pump of the horizontal filter press shown;

[0075] Figure 6 for Figure 1 the right view of the horizontal filter press feeding pump shown in the figure;

[0076] Figure 7 for Figure 1 the front sectional view of the piston cylinder shown in the figure;

[0077] Figure 8 for Figure 1 the front sectional view of the hydraulic cylinder shown in the figure;

[0078] Figure 9 the front view of the horizontal filter press feeding pump provided by another embodiment of the utility model;

[0079] Figure 10 for Figure 9 the local enlarged view at A shown in the figure;

[0080] Figure 11 the connection structure diagram of the hydraulic cylinder, piston cylinder and connecting frame of the horizontal filter press feeding pump provided by still another embodiment of the utility model;

[0081] Figure 12 the position relation overhead view of the hydraulic pump and motor and hydraulic cylinder of the horizontal filter press feeding pump provided by still another embodiment of the utility model.

[0082] Reference signs:

[0083] 1-hydraulic cylinder; 101-first cavity; 102-second cavity; 103-first oil port; 104-second oil port; 11-hydraulic piston; 111-first push rod; 112-second push rod; 2-piston cylinder; 201-rod cavity; 202-rodless cavity; 21-pumping piston; 22-piston rod; 221-ball head; 23-feeding pipe; 231-feeding tee; 232-first check valve; 233-second check valve; 24-pumping pipe; 241-discharging tee; 242-third check valve; 243-fourth check valve; 3-hydraulic oil tank; 301-oil filling port; 4-hydraulic pump; 41-motor; 5-electromagnetic reversing valve; 51-oil supply oil way; 52-oil return oil way; 53-first oil way; 54-second oil way; 6-air cooler; 61-cooling oil way; 7-connecting frame; 71-guide sleeve flange; 711-lubricating oil hole; 72-lubricating oil tank; 73-electric lubricating oil pump; 74-lubricating oil way; 8-coupling; 81-inner ball head base; 9-electric control box; 91-indicator light; 92-touch screen. DETAILED DESCRIPTION

[0084] 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.

[0085] 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.

[0086] 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.

[0087] The present invention will be further explained below with reference to specific embodiments.

[0088] It should also be noted that the specific embodiments or implementation methods described below are a series of optimized settings listed by this utility model to further explain the specific utility model content, and these settings can be combined or used in conjunction with each other.

[0089] Example 1

[0090] like Figures 1-8 As shown, this embodiment provides a horizontal filter press feed pump, including: a hydraulic cylinder 1, a piston cylinder 2, a feed pipe 23, and a pumping pipe 24; the push rod of the hydraulic cylinder 1 is connected to the piston rod 22 of the piston cylinder 2, and is used to drive the piston rod 22 to reciprocate linearly, thereby driving the pumping piston 21 in the piston cylinder 2 to reciprocate linearly, forcing the rod chamber 201 and the rodless chamber 202 of the piston cylinder 2 to switch back and forth for cyclic feeding and discharging;

[0091] The feeding pipe 23 is communicated with the rod cavity 201 and the rodless cavity 202 of the piston cylinder 2 through a feeding three-way pipe 231, the feeding pipe 23 is communicated with the inlet of the feeding three-way pipe 231, and the rod cavity 201 or the rodless cavity 202 of the piston cylinder 2 is fed from the feeding pipe 23; a first check valve 232 is connected between the first outlet of the feeding three-way pipe 231 and the rod cavity 201 of the piston cylinder 2, the inlet of the first check valve 232 is communicated with the first outlet of the feeding three-way pipe 231, the outlet of the first check valve 232 is communicated with the rod cavity 201 of the piston cylinder 2, and the material flows from the feeding pipe 23 to the rod cavity 201 of the piston cylinder 2 in one way, so that the material in the rod cavity 201 of the piston cylinder 2 is prevented from being discharged from the feeding pipe 23 through the first check valve 232; a second check valve 233 is connected between the second outlet of the feeding three-way pipe 231 and the rodless cavity 202 of the piston cylinder 2, the inlet of the second check valve 233 is communicated with the second outlet of the feeding three-way pipe 231, and the outlet of the second check valve 233 is communicated with the rodless cavity 202 of the piston cylinder 2, so that the material flows from the feeding pipe 23 to the rodless cavity 202 of the piston cylinder 2 in one way, and the material in the rodless cavity 202 of the piston cylinder 2 is prevented from being discharged from the feeding pipe 23 through the second check valve 233.

[0092] The pump pipe 24 is vertically arranged, the upper end inlet of the pump pipe 24 is communicated with the rod cavity 201 and the rodless cavity 202 of the piston cylinder 2 through a discharge three-way pipe 241, the upper end inlet of the pump pipe 24 is communicated with the outlet of the discharge three-way pipe 241, the lower end outlet of the pump pipe 24 is communicated with the feeding inlet of the filter press, and the material in the rod cavity 201 or the rodless cavity 202 of the piston cylinder 2 is conveyed downward into the filter press from the pump pipe 24; a third check valve 242 is connected between the rod cavity 201 of the piston cylinder 2 and the first inlet of the discharge three-way pipe 241, the inlet of the third check valve 242 is communicated with the rod cavity 201 of the piston cylinder 2, and the outlet of the third check valve 242 is communicated with the first inlet of the discharge three-way pipe 241, so that the material in the rod cavity 201 of the piston cylinder 2 is discharged from the pump pipe 24 in one way, and the material is prevented from flowing from the pump pipe 24 to the rod cavity 201 of the piston cylinder 2 through the third check valve 242; a fourth check valve 243 is connected between the rodless cavity 202 of the piston cylinder 2 and the second inlet of the discharge three-way pipe 241, the inlet of the fourth check valve 243 is communicated with the rodless cavity 202 of the piston cylinder 2, and the outlet of the fourth check valve 243 is communicated with the second inlet of the discharge three-way pipe 241, so that the material in the rodless cavity 202 of the piston cylinder 2 is discharged from the pump pipe 24 in one way, and the material is prevented from flowing from the pump pipe 24 to the rodless cavity 202 of the piston cylinder 2 through the fourth check valve 243.

[0093] The hydraulic cylinder 1 pushes the piston rod 22 to retract into the piston cylinder 2, and then pushes the pump piston 21 in the rodless cavity 202 of the piston cylinder 2 through the piston rod 22, and extrudes the material in the rodless cavity 202 of the piston cylinder 2 by the pump piston 21, the second check valve 233 is closed, the fourth check valve 243 is opened, and the material in the rodless cavity 202 of the piston cylinder 2 is forced to be transported downward from the pump pipe 24 into the filter press through the fourth check valve 243; at the same time, the volume of the rod cavity 201 of the piston cylinder 2 increases, the pressure decreases, the third check valve 242 is closed, the first check valve 232 is opened, and the rod cavity 201 of the piston cylinder 2 is forced to suck the material from the feed pipe 23.

[0094] The hydraulic cylinder 1 pulls the piston rod 22 to extend out of the piston cylinder 2, and then pulls the pump piston 21 in the rod cavity 201 of the piston cylinder 2 through the piston rod 22, and extrudes the material in the rod cavity 201 of the piston cylinder 2 by the pump piston 21, the first check valve 232 is closed, the third check valve 242 is opened, and the material in the rod cavity 201 of the piston cylinder 2 is forced to be transported downward from the pump pipe 24 into the filter press through the third check valve 242; at the same time, the volume of the rodless cavity 202 of the piston cylinder 2 increases, the pressure decreases, the fourth check valve 243 is closed, the second check valve 233 is opened, and the rodless cavity 202 of the piston cylinder 2 is forced to suck the material from the feed pipe 23.

[0095] The push rod of the hydraulic cylinder 1 is connected with the piston rod 22 of the piston cylinder 2, the piston rod 22 is driven to push and pull the pump piston 21 of the piston cylinder 2 by hydraulic transmission, the pump piston 21 is driven to reciprocate linearly in the piston cylinder 2, the rod cavity 201 and the rodless cavity 202 of the piston cylinder 2 are forced to reciprocate to switch the feeding and discharging, and compared with the existing feeding pump with the same flow, the energy saving can reach 28%~70%; the pump pipe 24 is vertically arranged, and the downward discharging mode can effectively avoid that the hard impurities in the material cannot be discharged in time due to gravity sinking, and cause the pump piston 21, the sealing ring and the piston cylinder 2 to be worn.

[0096] In a feasible embodiment, preferably, a first oil port 103 is arranged on the cavity wall of the first cavity 101 of the hydraulic cylinder 1 for supplying oil into the first cavity 101 of the hydraulic cylinder 1 or discharging hydraulic oil from the first cavity 101 of the hydraulic cylinder 1; a second oil port 104 is arranged on the cavity wall of the second cavity 102 of the hydraulic cylinder 1 for discharging hydraulic oil from the second cavity 102 of the hydraulic cylinder 1 or supplying oil into the second cavity 102 of the hydraulic cylinder 1; the hydraulic cylinder 1 is a double-rod hydraulic cylinder 1, and the hydraulic piston 11 in the hydraulic cylinder 1 is provided with a push rod on both the first cavity 101 side and the second cavity 102 side, which are a first push rod 111 and a second push rod 112 respectively, and the second push rod 112 is connected with the piston rod 22.

[0097] More preferably, the horizontal filter press feeding pump further comprises a hydraulic oil tank 3, a hydraulic pump 4, an electromagnetic reversing valve 5, an oil supply oil way 51, an oil return oil way 52, a first oil way 53 and a second oil way 54; the hydraulic oil tank 3 is communicated with the P port of the electromagnetic reversing valve 5 through the oil supply oil way 51, and the hydraulic oil tank 3 is communicated with the T port of the electromagnetic reversing valve 5 through the oil return oil way 52; the A port of the electromagnetic reversing valve 5 is communicated with the first oil port 103 of the first cavity 101 of the hydraulic cylinder 1 through the first oil way 53, and the B port of the electromagnetic reversing valve 5 is communicated with the second oil port 104 of the second cavity 102 of the hydraulic cylinder 1 through the second oil way 54; the hydraulic pump 4 is connected on the oil supply oil way 51, the oil inlet of the hydraulic pump 4 is communicated with the hydraulic oil tank 3, the oil outlet of the hydraulic pump 4 is communicated with the P port of the electromagnetic reversing valve 5, the hydraulic pump 4 is driven by a motor 41, and is used for pumping hydraulic oil in the hydraulic oil tank 3 into the hydraulic cylinder 1, converting mechanical energy into hydraulic energy (i.e. pressure energy of hydraulic oil) with higher energy density to drive the hydraulic cylinder 1, thereby reducing energy consumption; the first cavity 101 and the second cavity 102 of the hydraulic cylinder 1 are selectively connected with the hydraulic pump 4 and the hydraulic oil tank 3 respectively through the electromagnetic reversing valve 5, for switching the oil inlet and the oil return of the first cavity 101 and the second cavity 102 of the hydraulic cylinder 1.

[0098] In the embodiment, the horizontal filter press feeding pump further comprises a cooling oil way 61 and an air cooler 6; one end of the cooling oil way 61 is communicated with the oil return oil way 52, and the other end is communicated with the hydraulic oil tank 3; the air cooler 6 is connected on the cooling oil way 61, and is used for cooling hydraulic oil by air cooling.

[0099] Further, the air cooler 6 is installed on the side of the hydraulic oil tank 3.

[0100] More preferably, the hydraulic pump 4 and the motor 41 are installed on the hydraulic oil tank 3, the output shaft of the motor 41 is connected with the input shaft of the hydraulic pump 4; the hydraulic pump 4 and the motor 41 are arranged in parallel with the hydraulic cylinder 1.

[0101] In the embodiment, the hydraulic oil tank 3 is provided with an oil filling port 301, which is used for supplementing hydraulic oil in the hydraulic oil tank 3 from the oil filling port 301.

[0102] Further, the horizontal filter press feeding pump further comprises a connecting frame 7, the connecting frame 7 is installed on the hydraulic oil tank 3, and the hydraulic cylinder 1 and the piston cylinder 2 are respectively installed at both ends of the connecting frame 7.

[0103] More preferably, the rod cavity 201 of the piston cylinder 2 is fixed on the side plate of the connecting frame 7 through a guide sleeve flange 71, the piston rod 22 is slidably arranged in the guide sleeve flange 71, and the guide sleeve flange 71 is used for guiding the piston rod 22.

[0104] In the embodiment, the horizontal filter press feeding pump further comprises an electric control box 9, the electric control box 9 is provided with a programmable logic controller (PLC) therein, which is used for automatic control of the horizontal filter press feeding pump; the programmable logic controller is electrically connected with the motor 41, which is used for controlling the motor 41 to run and stop, and receiving the motor 41 running and stopping signals; the hydraulic oil tank 3 is provided with a liquid level sensor and a temperature sensor therein, which are respectively used for monitoring the liquid level and temperature of the hydraulic oil in the hydraulic oil tank 3 in real time; the liquid level sensor and the temperature sensor are both electrically connected with the programmable logic controller, which is used for feeding back the liquid level and temperature signals of the hydraulic oil in the hydraulic oil tank 3 to the programmable logic controller in real time;

[0105] The electric control box 9 is provided with green, red and yellow indicator lights 91, and the three indicator lights 91 are all electrically connected with the programmable logic controller;

[0106] The green indicator light 91 is used for indicating that the horizontal filter press feeding pump is in a normal running state by lighting up;

[0107] The red indicator light 91 is used for indicating that the horizontal filter press feeding pump is in a shutdown or fault state by lighting up;

[0108] The yellow indicator light 91 is used for warning that the oil level in the hydraulic oil tank 3 is too low and / or the oil temperature is too high by lighting up;

[0109] When the motor 41 runs, the programmable logic controller receives the motor 41 running signal, and the programmable logic controller controls the green indicator light 91 to light up;

[0110] When the motor 41 stops, the programmable logic controller receives a motor 41 stop signal, and the programmable logic controller controls the red indicator light 91 to light up;

[0111] When the liquid level sensor detects that the liquid level of the hydraulic oil in the hydraulic oil tank 3 is lower than the preset alarm liquid level, the programmable logic controller receives the liquid level signal sent by the liquid level sensor and alarms, and the programmable logic controller controls the yellow indicator light 91 to light up to warn against the wear of the pump head of the hydraulic pump 4 caused by the leakage of hydraulic oil;

[0112] When the temperature sensor detects that the temperature of the hydraulic oil in the hydraulic oil tank 3 is higher than the preset alarm temperature, the programmable logic controller receives the temperature signal sent by the liquid level sensor and alarms, and the programmable logic controller controls the yellow indicator light 91 to light up to warn.

[0113] The present application realizes visual management by setting the indicator light 91. When the horizontal filter press feed pump is arranged away from the filter press, the on-site operator can distinguish the running state of the horizontal filter press feed pump by observing the light color of the indicator light 91 from a distance, without moving to the front of the horizontal filter press feed pump, thereby reducing labor intensity and improving work efficiency.

[0114] Further, the hydraulic cylinder 1 is provided with a displacement sensor for real-time monitoring of the displacement of the push rod of the hydraulic cylinder 1; the displacement sensor is electrically connected with the programmable logic controller, and is used for feeding back the displacement signal of the push rod to the programmable logic controller in real time.

[0115] When the displacement sensor detects that the displacement of the push rod is not within the preset safe displacement range, the programmable logic controller receives the displacement signal sent by the displacement sensor and triggers a fault indication, and the programmable logic controller controls the red indicator light 91 to light up to warn; otherwise, the green indicator light 91 lights up.

[0116] More preferably, the programmable logic controller is electrically connected with the electric lubricating oil pump 73, and is used for setting the pump oil interval length and single pump oil length of the electric lubricating oil pump 73, and then controlling the electric lubricating oil pump 73 to pump lubricating oil in a fixed time and a fixed quantity according to the pump oil interval length and the single pump oil length, so as to effectively avoid the aggravation of the wear of the sealing ring caused by artificial control forgetting.

[0117] In the embodiment, the PLC is electrically connected with the pressure sensor of the filter press to receive the pressure state in the filter press; the PLC is electrically connected with the motor 41 of the hydraulic pump 4 and the electromagnetic reversing valve 5 to jointly control the operation of the hydraulic pump 4 and the reversing of the electromagnetic reversing valve 5, thereby controlling the hydraulic cylinder 1 to drive the piston cylinder 2 to reciprocate and pump the material until the filter press is filled to the rated pressure state.

[0118] Further, the electric control box 9 is provided with a circuit control system composed of the PLC, a power supply, a thermal overload protector, and circuit control switches such as electromagnetic relays and solid-state relays, which are connected by circuits, to control the horizontal filter press material feeding pump; the power supply is used to supply power to the horizontal filter press material feeding pump; the thermal overload protector is used to protect the horizontal filter press material feeding pump from thermal overload, and to protect the circuit from being broken when the current is too large or the temperature is too high.

[0119] More preferably, the electric control box 9 is further provided with a touch screen 92, which is electrically connected with the PLC to manually control the PLC through the touch screen and display the received signal data.

[0120] In the embodiment, the PLC mainly includes a processor, a memory, and a bus, the memory stores instructions and data read by the processor, the processor is used to call the instructions and data in the memory, and the bus is used to transmit information between the functional components;

[0121] The functions that can be realized by the PLC include but are not limited to:

[0122] The pressure signal of the pressure sensor of the filter press is received to jointly control the motor 41 to drive the hydraulic pump 4 to operate and the electromagnetic reversing valve 5 to reverse;

[0123] The running or stopping signal of the motor 41 and the displacement signal of the displacement sensor are received to control the green indicator light 91 or the red indicator light 91 to turn on or off;

[0124] The liquid level signal of the liquid level sensor and the temperature signal of the temperature sensor are received to control the yellow indicator light 91 to turn on or off;

[0125] The electric lubricating oil pump 73 is controlled to pump lubricating oil in a set pumping interval and a single pumping time.

[0126] In a feasible implementation, the PLC can access the network, thereby realizing remote upgrading of the running program, fault diagnosis, and maintenance.

[0127] The utility model discloses a hydraulic cylinder 1's push rod is connected with the piston rod 22 of piston cylinder 2, utilizes the mode of hydraulic transmission to drive the pump material piston 21 of piston rod 22 push and pull piston cylinder 2, drives pump material piston 21 reciprocating linear motion in piston cylinder 2, forces the reciprocating switching cycle of piston cylinder 2's rod cavity 201 and rodless cavity 202 feed and discharge, compared with the feed pump of equal flow of prior art can save energy 28%~70%, pump material pipe 24 is vertically arranged, and the downward discharge mode can effectively avoid that the hard impurity in material cannot be discharged in time due to gravity sinking and causes pump material piston 21, sealing ring and piston cylinder 2 abrasion.

[0128] Example 2

[0129] This embodiment is basically same with example 1, and the difference is that:

[0130] As Figures 9-10 The utility model discloses a horizontal filter press feed pump, still include lubricating oil tank 72, electric lubricating oil pump 73 and lubricating oil path 74, the sealing ring in the guide sleeve flange 71 is connected with the sealing ring of piston rod 22 and forms the closed space, be provided with lubricating oil hole 711 in the guide sleeve flange 71, lubricating oil hole 711 is connected with the sealing ring of piston rod 22, lubricating oil tank 72 is connected with lubricating oil hole 711 through lubricating oil path 74, electric lubricating oil pump 73 is connected on lubricating oil path 74, is used for the lubricating oil in lubricating oil tank 72 from lubricating oil path 74 to the pump of lubricating oil hole 711, and then through lubricating oil for the sealing ring between guide sleeve flange 71 and the sealing ring of piston rod 22 provides lubrication, simultaneously because the sealing ring between guide sleeve flange 71 and the sealing ring of piston rod 22 forms closed space, therefore effectively avoided the waste of lubricating oil and the pollution to environment.

[0131] In this embodiment, the electric lubricating oil pump 73 is installed on the connecting frame 7, and the lubricating oil tank 72 is installed below the electric lubricating oil pump 73.

[0132] Example 3

[0133] This embodiment is basically same with example 1, and the difference is that:

[0134] As Figure 11As shown in this embodiment, a feed pump for a horizontal filter press is provided. The second push rod 112 of the hydraulic cylinder 1 and the piston rod 22 of the piston cylinder 2 are connected by a coupling 8. The coupling 8 is connected to the second push rod 112 by a thread. The coupling 8 is provided with an inner ball head base 81 at one end near the piston rod 22, and a ball head 221 is provided at the end of the piston rod 22. The piston rod 22 is connected to the inner ball head base 81 of the coupling 8 by the ball head 221 to achieve a universal ball joint connection. This effectively solves the problem of seal wear caused by the cumulative deviation of the interconnection between the hydraulic cylinder 1, the coupling 8, the piston cylinder 2, and the connecting frame 7. The universal ball joint connection freely absorbs the form and position deviation, reducing the wear of the seal ring of the guide sleeve flange 71.

[0135] Example 4

[0136] This embodiment is basically the same as embodiment 1, except that:

[0137] like Figure 12 As shown in the figure, this embodiment provides a horizontal filter press feed pump, which is used to replace the existing screw pump to transport materials to the filter press. The existing screw pump is usually installed in a narrow space with a length of 4000mm and a width of 500mm.

[0138] See attached document Figure 12 As shown, the hydraulic pump 4 and the motor 41 are arranged colinearly with the hydraulic cylinder 1 and are located on one side of the first push rod 111 of the hydraulic cylinder 1. The feed pump of the horizontal filter press is installed on a narrow foundation (not shown). The length of the narrow foundation is 2700~3500mm and the width is 500mm. It can be installed in a narrow space with a length of 4000mm and a width of 500mm to replace the screw pump to transport materials to the filter press.

[0139] More preferably, the third check valve 242 and the fourth check valve 243 are disposed above the piston cylinder 2, and the pump feed pipe 24 is vertically arranged on the side of the piston cylinder 2 away from the hydraulic cylinder 1, so as to further reduce the width of the feed pump of the horizontal filter press. Figure 12 The electrical control box 9, hydraulic oil tank 3, air cooler 6, solenoid directional valve 5, and various hydraulic oil circuits are omitted. The connection method and installation position of the above structures are basically the same as those in Example 1.

[0140] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A horizontal filter press feed pump characterized by, Comprise: Hydraulic cylinder, piston cylinder, feed pipe and pump pipe; The push rod of the hydraulic cylinder is connected with the piston rod of the piston cylinder, for driving the piston rod to reciprocate linearly, and in turn driving the pump piston in the piston cylinder to reciprocate linearly, forcing the rod cavity and rodless cavity of the piston cylinder to reciprocate to switch the feeding and discharging of the rod cavity and rodless cavity of the piston cylinder; The feed pipe is communicated with the rod cavity and rodless cavity of the piston cylinder through a feed tee joint, for the rod cavity or rodless cavity of the piston cylinder to feed from the feed pipe; The first outlet of the feed tee joint is connected with the rod cavity of the piston cylinder through a first check valve, for the material to flow from the feed pipe to the rod cavity of the piston cylinder in one direction; The second outlet of the feed tee joint is connected with the rodless cavity of the piston cylinder through a second check valve, for the material to flow from the feed pipe to the rodless cavity of the piston cylinder in one direction; The pump pipe is vertically arranged, the upper end of the pump pipe is communicated with the rod cavity and rodless cavity of the piston cylinder through a discharge tee joint, and the lower end of the pump pipe is communicated with the inlet of the filter press, for the material in the rod cavity or rodless cavity of the piston cylinder to be delivered downward from the pump pipe into the filter press; The rod cavity of the piston cylinder is connected with the first inlet of the discharge tee joint through a third check valve, for the material in the rod cavity of the piston cylinder to be discharged from the pump pipe in one direction; The rodless cavity of the piston cylinder is connected with the second inlet of the discharge tee joint through a fourth check valve, for the material in the rodless cavity of the piston cylinder to be discharged from the pump pipe in one direction.

2. The horizontal filter press feed pump of claim 1, wherein, The first cavity of the hydraulic cylinder is provided with a first oil port, for supplying oil into the first cavity of the hydraulic cylinder or discharging hydraulic oil in the first cavity of the hydraulic cylinder; The second cavity of the hydraulic cylinder is provided with a second oil port, for discharging hydraulic oil in the second cavity of the hydraulic cylinder or supplying oil into the second cavity of the hydraulic cylinder; The hydraulic cylinder is a double-rod hydraulic cylinder, the hydraulic piston in the hydraulic cylinder is provided with a push rod on the first cavity side and the second cavity side, which are respectively a first push rod and a second push rod, and the second push rod is connected with the piston rod.

3. The horizontal filter press feed pump of claim 1, wherein, Further comprise: Hydraulic oil tank, hydraulic pump, electromagnetic reversing valve, oil supply oil way, oil return oil way, first oil way and second oil way; The hydraulic oil tank is communicated with the P port of the electromagnetic reversing valve through the oil supply oil way, and the hydraulic oil tank is communicated with the T port of the electromagnetic reversing valve through the oil return oil way; The A port of the electromagnetic reversing valve is communicated with the first oil port of the first cavity of the hydraulic cylinder through the first oil way, and the B port of the electromagnetic reversing valve is communicated with the second oil port of the second cavity of the hydraulic cylinder through the second oil way; The hydraulic pump is connected on the oil supply oil way, the oil inlet of the hydraulic pump is communicated with the hydraulic oil tank, the oil outlet of the hydraulic pump is communicated with the P port of the electromagnetic reversing valve, and the hydraulic pump is driven by a motor, for pumping the hydraulic oil in the hydraulic oil tank into the hydraulic cylinder; The hydraulic pump and the motor are arranged in parallel or collinearly with the hydraulic cylinder; The first cavity and the second cavity of the hydraulic cylinder are switchably connected with the hydraulic pump and the hydraulic oil tank through the electromagnetic reversing valve, for switching the oil inlet and oil return of the first cavity and the second cavity of the hydraulic cylinder.

4. A horizontal filter press feed pump according to claim 3, characterised in that, Further comprise: Cooling oil circuit and air cooler; One end of the cooling oil circuit is communicated with the return oil circuit, and the other end is communicated with the hydraulic oil tank; The air cooler is connected on the cooling oil circuit for cooling hydraulic oil by air cooling.

5. The horizontal filter press feed pump of claim 3, wherein, Further comprising a connecting frame, which is installed on the hydraulic oil tank, and the hydraulic cylinder and the piston cylinder are respectively installed at both ends of the connecting frame.

6. A horizontal filter press feed pump according to claim 5, characterised in that, The rod cavity of the piston cylinder is fixed on the side plate of the connecting frame through a guide sleeve flange, the piston rod is slidably arranged in the guide sleeve flange, and the guide sleeve flange is used for guiding the piston rod.

7. A horizontal filter press feed pump according to claim 6, characterised in that, Further comprising a lubricating oil tank, an electric lubricating oil pump and a lubricating oil circuit; The sealing ring in the guide sleeve flange is communicated with the sealing ring of the piston rod to form a closed space, and a lubricating oil hole is arranged in the guide sleeve flange and communicated with the sealing ring of the piston rod; The lubricating oil tank is communicated with the lubricating oil hole through the lubricating oil circuit, the electric lubricating oil pump is connected on the lubricating oil circuit, and the electric lubricating oil pump is used for pumping lubricating oil in the lubricating oil tank from the lubricating oil circuit to the lubricating oil hole, so as to provide lubrication between the sealing ring in the guide sleeve flange and the sealing ring of the piston rod.

8. The horizontal filter press feed pump of claim 1, wherein, The second push rod of the hydraulic cylinder and the piston rod of the piston cylinder are connected through a shaft coupling; The shaft coupling is connected with the second push rod through threads; The shaft coupling is provided with an inner ball head base at one end close to the piston rod, and the end of the piston rod is provided with a ball head, so that the piston rod is connected with the inner ball head base of the shaft coupling through the ball head to realize universal ball joint connection.

9. The horizontal filter press feed pump of claim 7, wherein, Further comprising an electric control box, which is provided with a programmable logic controller for automatic control of the horizontal filter press feeding pump; The programmable logic controller is electrically connected with the motor for controlling the operation and stop of the motor and receiving the operation and stop signals of the motor; The liquid level sensor and the temperature sensor are arranged in the hydraulic oil tank for real-time monitoring of the liquid level and temperature of the hydraulic oil in the hydraulic oil tank; The liquid level sensor and the temperature sensor are electrically connected with the programmable logic controller for real-time feedback of the liquid level and temperature signals of the hydraulic oil in the hydraulic oil tank to the programmable logic controller; The electric control box is provided with green, red and yellow indicator lights, and the three indicator lights are electrically connected with the programmable logic controller; The green indicator light is used to indicate that the horizontal filter press feeding pump is in normal operation state by lighting; The red indicator light is used to indicate that the horizontal filter press feeding pump is in stop and fault state by lighting; The yellow indicator light is used to warn that the oil level in the hydraulic oil tank is too low and / or the oil temperature is too high by lighting.

10. The horizontal filter press feed pump of claim 9, wherein, The programmable logic controller is electrically connected with the electric lubricating oil pump for setting the pump oil interval time and single pump oil time of the electric lubricating oil pump, and then controlling the electric lubricating oil pump to pump lubricating oil regularly and quantitatively according to the pump oil interval time and single pump oil time.

Images