CN208578783U - A kind of filter press weighing apparatus pressure system - Google Patents

Abstract

The utility model relates to filtering equipment manufacturing technology fields, disclose a kind of filter press weighing apparatus pressure system, including chamber-type press filter, and master cylinder, filter plate, feed pipe and the pressed liquor pipeline of its mating connection, there are also hydraulic hydraulic station is provided for master cylinder, feed pressure sensor is set in the feed pipe, squeeze pressure sensor is set in the squeezing pipeline, connects proportional pressure valve in the outlet of the hydraulic station；In the outside of the chamber-type press filter, it is equipped with a controller, is separately connected feed pressure sensor and squeeze pressure sensor, and connect control proportional pressure valve；Pressure sensor is set, the pressure of feed pipe and pressed liquor pipeline is measured, it can be deduced that the size of filter chamber operating pressure, further according to the size of filter chamber operating pressure, by proportional pressure control valve, the pressure size of master cylinder is controlled, structure is simple, reliable operation, low cost, failure rate also decline to a great extent.

Description

A kind of filter press weighing apparatus pressure system

Technical field

The utility model relates to filtering equipment manufacturing technology field more particularly to a kind of filter press weighing apparatus pressure systems.

Background technique

Traditional chamber-type press filter is next in filter plate conjunction, and the pressure of master cylinder reaches maximum pressure, main before filter chamber charge The thrust that cylinder generates is born by filter plate frame completely.After filter chamber charge, with the increase of charge pressure, frame stress reduces, The launch force that master cylinder generates is constant.By taking the filter press of 2000 ╳ 2000 as an example, filter plate outer dimension is 2 meters of 2 meter ╳, and area is 4 square metres, filter chamber is 1.9 meters 1.9 meters of ╳, and filter chamber area is 3.61 square metres, and filter chamber maximum functional pressure is 1MPa.Frame face Product is 4-3.61=0.39 square metres, and the master cylinder cylinder diameter matched is Φ 500, operating pressure 25MPa, maximum launch force F=P ╳ Л r2=4908739N.Filter plate conjunction is next, and master cylinder launch force is born by frame completely, and the pressure that frame is subject to is 4908739/ 0.39=12.6MPa, when filter chamber reaches the maximum feed pressure of design, the thrust that filter chamber generates is 1MPa ╳ 3.61= 3610000N, the pressure that frame is subject to be this pressure method of (4908739-3610000)/0.39=3.3MPa. make frame by Power can undergo the change procedure of 12.6MPa to 3.3MPa in each duty cycle, be easy to cause frame fatigue rupture, also limit The maximum working pressure (MWP) of filter chamber cannot be too high.Such as patent of invention 2014104958039 " a kind of high pressure filter-pressing device " and hair A kind of bright patent 2016103586856 " filter press self-balancing pressure device " each provides a kind of filter press master cylinder pressure control Method processed, but they require dedicated pressurized cylinder to solve the problems, such as, and structure is complicated, and cost is high, and failure rate is also high.

Utility model content

The utility model in order to solve the problems, such as filter press in the prior art need dedicated pressurized cylinder solve, structure it is multiple It is miscellaneous, cost is high, failure rate also high deficiency, provide it is a kind of there is no pressurized cylinder, structure is simple, reliable operation, low cost, event A kind of filter press weighing apparatus pressure system that barrier rate also declines to a great extent.

To achieve the above objectives, the present invention adopts the following technical solutions:

A kind of filter press weighs pressure system, including chamber-type press filter, with the master cylinder of its mating connection, filter plate, feed pipe and Pressed liquor pipeline provides hydraulic hydraulic station for master cylinder, and feed pressure sensor, the squeezing liquid pipe is arranged in the feed pipe Squeeze pressure sensor is arranged in road, and the outlet of the hydraulic station connects proportional pressure valve, and the outside of the chamber-type press filter is equipped with One controller, the feed pressure sensor, squeeze pressure sensor and proportional pressure valve are connected with controller.According to compartment The working characteristics of formula filter press, charging and squeezing will not carry out simultaneously, but feed pressure and squeeze pressure can all act on filter chamber On, therefore the utility model installs pressure sensor respectively on feed pipe and pressed liquor pipeline respectively, measures feed pipe With the pressure of pressed liquor pipeline, it can be deduced that the size of filter chamber operating pressure, the pressure signal via controller ratio of two sensors After relatively, using a big value of pressure as filter chamber operating pressure P_Enter, and by controller according to P_EnterExport a pressure signal P_Out, should Output signal controls the oil pressure relief of proportional pressure valve, P_OutWith P_EnterMeet following relationship P_Out=KP_Enter+P₀, K is filter plate area in formula With the ratio of master cylinder sectional area, the ratio between filter chamber and master cylinder sectional area, P can also be taken₀To pre-tighten pressure, P_EnterIt works and presses for filter chamber By force, P_OutFor main cylinder working pressure.

When work, when oil pump is to master cylinder fuel feeding, it is ensured that master cylinder operating pressure=filter chamber operating pressure * coefficient+preload Pressure, as the pressure of master cylinder is greater than KP_Enter+P₀, then proportional pressure valve overflow makes the pressure of master cylinder be consistently equal to KP_Enter+P₀.Such as master cylinder Pressure is lower than KP_Enter+P₀, then start hydraulic oil pump, to master cylinder ftercompction, until master cylinder pressure is equal to KP_Enter+P₀.It can effectively avoid filtering Plate, which automatically opens, causes material leakage, and is unlikely to that filter plate frame is made to bear excessive pressure in filter chamber no pressure.

Preferably, the inside of the chamber-type press filter includes the consistent material mould of size shape and object mould, the material mould and Object mould one to one is arranged alternately, and the two sides of the chamber-type press filter are equipped with a pair of of thrust plate and pushing plate, institute in the vertical direction It states thrust plate to be fixedly connected with the body of chamber-type press filter, the pushing plate is fixedly connected with master cylinder, the material mould and water mould position Between thrust plate and pushing plate.Stacking sandwich-like is set by filter chamber, working space, filters pressing can be utilized to the full extent More materials, working efficiency is higher, and thrust plate is the limit plate of filter chamber, prevents filter chamber from moving backward, with the fixed company of master cylinder The pushing plate connect is the brake plate of filter chamber, is responsible for squeezing filter chamber.

Preferably, the outer end face of the water mould is equipped with diaphragm rubber.Diaphragm rubber is isolated by filter cake and water mould, prevents from filtering Slag enters in water mould, block water mould, cause water mould can not normal use, more water mould can be made easy to clean.

Therefore, a kind of filter press weighing apparatus pressure system of the utility model has the advantage that there is no pressurized cylinder, structure letters List, reliable operation, low cost, failure rate also decline to a great extent.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Wherein: chamber-type press filter 1, filter plate 2, master cylinder 3, feed pressure sensor 4, squeeze pressure sensor 5, body 6, material Mould 7, hydraulic station 8, controller 9, proportional pressure valve 10, water mould 11, thrust plate 12, pushing plate 13, feed pipe 14, squeezing pipeline 15。

Specific embodiment

Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.

The pressure system as shown in Figure 1, a kind of filter press weighs, in which:

A kind of filter press weighing apparatus pressure system, master cylinder 3, filter plate 2, feed pipe including chamber-type press filter 1 and its mating connection 14 and squeezing pipeline 15, provide hydraulic hydraulic station 8 for master cylinder, feed pressure sensor 4, pressed liquor pipeline is arranged in feed pipe Squeeze pressure sensor 5 is set, and the outlet of hydraulic station connects proportional pressure valve 10, and the outside of chamber-type press filter is equipped with a controller 9, feed pressure sensor, squeeze pressure sensor and proportional pressure valve are connected with controller.According to chamber-type press filter Working characteristics, charging and squeezing will not carry out simultaneously, but feed pressure and squeeze pressure can all act on filter chamber, therefore this reality With novel pressure sensor is installed respectively on feed pipe and pressed liquor pipeline respectively, measures feed pipe and pressed liquor pipeline Pressure, it can be deduced that the size of filter chamber operating pressure, the pressure signal via controller of two sensors relatively after, pressure is big One value be used as filter chamber operating pressure P_Enter, and the output pressure P of proportional pressure valve is controlled as the following formula_Out, P_Out=KP_Enter+P₀, in formula K is the ratio of filter plate area and master cylinder sectional area, can also take the ratio between filter chamber and master cylinder sectional area, P₀To pre-tighten pressure, P_EnterFor Filter chamber operating pressure, P_OutFor main cylinder working pressure, it is ensured that master cylinder operating pressure=filter chamber operating pressure * coefficient+preload pressure, When work, when oil pump is to master cylinder fuel feeding, it is ensured that master cylinder operating pressure=filter chamber operating pressure * coefficient+preload pressure, it is such as main The pressure of cylinder is greater than KP_Enter+P₀, then proportional pressure valve overflow makes the pressure of master cylinder be consistently equal to KP_Enter+P₀.As master cylinder pressure is lower than KP_Enter+P₀, then start hydraulic oil pump, to master cylinder ftercompction, until master cylinder pressure is equal to KP_Enter+P₀.Effectively filter plate can be avoided to beat automatically It opens and causes material leakage, and be unlikely to that filter plate frame is made to bear excessive pressure knot in filter chamber no pressure.Filter plate includes size shape one The material mould 7 and water mould 11 of cause expect that mould and water mould one to one are arranged alternately, and the two sides of chamber-type press filter are equipped with one in the vertical direction To thrust plate 12 and pushing plate 13, thrust plate is fixedly connected with the body 6 of chamber-type press filter, and pushing plate is fixedly connected with master cylinder, Expect mould and water mould between thrust plate and pushing plate.Stacking sandwich-like is set by filter chamber, can be utilized to the full extent Working space, the more materials of filters pressing, working efficiency is higher, and thrust plate is the limit plate of filter chamber, prevents filter chamber from moving backward, The pushing plate being fixedly connected with master cylinder is the brake plate of filter chamber, is responsible for squeezing filter chamber.The outer end face of water mould is equipped with diaphragm Rubber.Diaphragm rubber is isolated by filter cake and water mould, prevents filter residue from entering in water mould, is blocked water mould, is caused water mould normal It uses, more water mould can be made easy to clean.

The weighing apparatus of filter press weighing apparatus pressure system presses method, comprising the following steps:

S1: molding: after material mould surface setting filter cloth, thrust plate, material mould, water mould, pushing plate, four fit closely realization Molding；

S2: pressure dehydration: material enters material mould from feed pipe, reaches the filter chamber that material mould and water mould are formed, feeds at this time Pipeline pressure increases, and feed pressure sensor transmits information to controller, and controller makes master cylinder by control proportional pressure valve Hydraulic pressure with raising, from beginning to end, the hydraulic satisfaction of master cylinder is with ShiShimonoseki:

P_Out=KP_Enter+P₀

P_EnterTake feed pressure

Moisture after material filters pressing is discharged from the lower part of material mould and water mould；

S3: extrusion dehydration: after pressure dehydration reaches setting condition, inlet valve is closed, squeezing is inputted from pressed liquor pipeline Liquid is to water mould, and when the pressure rise in pressed liquor pipeline, squeeze pressure sensor transmits information to controller, and controller is logical Control proportional pressure valve is crossed, makes the hydraulic pressure of master cylinder with raising, from beginning to end, the hydraulic satisfaction of master cylinder is with ShiShimonoseki:

P_Out=KP_Enter+P₀

P_EnterTake squeeze pressure

Pressed liquor pushes the diaphragm rubber of water mould surface, squeezes filter cake, the raffinate in filter cake is made to continue to be discharged；

S4: die sinking and discharging: closing pressed liquor pipeline, and master cylinder returns, and pulls pushing plate, opens material mould and water mould, will do Dry filter cake is drawn off, and completes pressure-filtering process.

A kind of filter press weighing apparatus pressure system and weighing apparatus pressure method of the utility model have there is no pressurized cylinder, structure is simple, work Make the beneficial effect that reliable, low cost, failure rate also decline to a great extent.

Claims (4)

1. The pressure system 1. a kind of filter press weighs, master cylinder, filter plate, feed pipe and pressure including chamber-type press filter and its mating connection It squeezes pipeline, hydraulic hydraulic station is provided for master cylinder, characterized in that feed pressure sensor, the pressure is arranged in the feed pipe It squeezes pipeline and squeeze pressure sensor is set, the master cylinder connects proportional pressure valve, and the outside of the chamber-type press filter is equipped with a control Device processed, the feed pressure sensor, squeeze pressure sensor and proportional pressure valve are connected with controller.
2. The pressure system 2. a kind of filter press according to claim 1 weighs, characterized in that the detection of the feed pressure sensor The output pressure of pressure, the detection pressure of squeeze pressure sensor and controller meets following relationship: P_Out=KP_Enter+P₀, In, P_OutFor the pressure of controller output pressure namely master cylinder, P_EnterThe filter detected for controller input pressure namely sensor Room operating pressure, P₀For preload pressure, i.e., when filter chamber operating pressure is 0, the pressure of master cylinder, K is proportionality coefficient, is equal to filter chamber The ratio between area and master cylinder sectional area.
3. The pressure system 3. a kind of filter press according to claim 1 weighs, characterized in that the filter plate includes that size shape is consistent Material mould and water mould, the material mould and water mould one to one be arranged alternately, and the two sides of the chamber-type press filter are set in the vertical direction There are a pair of of thrust plate and pushing plate, the thrust plate is fixedly connected with the body of chamber-type press filter, and the pushing plate and master cylinder are solid Fixed connection, the material mould and water mould are between thrust plate and pushing plate.
4. The pressure system 4. a kind of filter press according to claim 3 weighs, characterized in that the outer end face of the water mould is equipped with diaphragm Rubber.