CN111958761A - Press-filtering forming equipment and press-filtering forming method for refractory material blank - Google Patents

Press-filtering forming equipment and press-filtering forming method for refractory material blank Download PDF

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Publication number
CN111958761A
CN111958761A CN202010883508.6A CN202010883508A CN111958761A CN 111958761 A CN111958761 A CN 111958761A CN 202010883508 A CN202010883508 A CN 202010883508A CN 111958761 A CN111958761 A CN 111958761A
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Prior art keywords
filter
pressure
plate
hydraulic cylinder
blank
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CN202010883508.6A
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Chinese (zh)
Inventor
姚平喜
连新瑞
白艳艳
张晓俊
韩改荣
王永玲
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Taiyuan University of Technology
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Taiyuan University of Technology
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Priority to CN202010883508.6A priority Critical patent/CN111958761A/en
Publication of CN111958761A publication Critical patent/CN111958761A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/54—Producing shaped prefabricated articles from the material specially adapted for producing articles from molten material, e.g. slag refractory ceramic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

The invention discloses a refractory material blank filter-press forming device and a filter-press forming method, which comprise a mud tank, a frame, a filter-press mechanism, a pressing plate, a hydraulic cylinder, a reversing valve and a hydraulic pump, wherein the mud tank is connected with an inner cavity of the filter-press mechanism through a mud pipeline; the cylinder body of the hydraulic cylinder is fixed on the top of the frame, the left position of the reversing valve is communicated with the upper cavity of the hydraulic cylinder, the right position of the reversing valve is communicated with the lower cavity of the hydraulic cylinder, and the liquid inlet end of the reversing valve is connected with the hydraulic pump and the alternating current generating device. The blank is prepared by filter pressing, and no adhesive is added, so that the purity of the material can be ensured; can obtain more compact blank, and the blank is isotropic, and can not produce layering and interlayer defects, so that the quality of the refractory material product can be improved.

Description

Press-filtering forming equipment and press-filtering forming method for refractory material blank
Technical Field
The invention relates to the technical field of refractory material preparation, in particular to refractory material blank filter-press forming equipment and a filter-press forming method.
Background
In order to improve the quality of the refractory material, the raw materials have to have high purity, accurate formula, fine granularity, uniform pug, high green brick density and reasonable firing process. The process flow for preparing the refractory material which is widely adopted at present is shown in figure 1. There are major problems including: in the granulation process, the ground pasty material is dried and added with adhesive to prepare particles with good fluidity and particle size of about 0.1 mm. The adhesive is calcined at high temperature, and a small amount of residual impurities exist in a blank, so that the purity of the raw materials is influenced; the slurry is sprayed, heated, vacuumized and granulated, so that the energy consumption is high; the compactness in the press forming process is not enough and uniform, and the defects of layering, interlayer and the like are easily formed.
The granulation process in the prior art method is a process which consumes a large amount of energy and needs a large heating power by heating the slurry material within a short time to evaporate water. Meanwhile, the press in the prior art method is pressed and formed, and the defects of layering and interlayer are easily caused along the pressure direction.
Disclosure of Invention
The invention aims to provide a refractory material blank filter-pressing forming device and a filter-pressing forming method, which aim to solve the problems in the prior art, and the blank is prepared by filter pressing without adding an adhesive, so that the purity of the material can be better ensured; can obtain more compact blank, and the blank is isotropic, and can not produce layering and interlayer defects, so that the quality of the refractory material product can be improved.
In order to achieve the purpose, the invention provides the following scheme: the invention provides refractory material blank filter-pressing forming equipment which comprises a slurry tank, a slurry pump, a rack, a filter-pressing mechanism, a pressing plate, a hydraulic cylinder, a reversing valve and a hydraulic pump, wherein the slurry tank is connected with an inner cavity of the filter-pressing mechanism through a slurry pipeline, and the slurry pump is arranged on the slurry pipeline; filter plates are arranged on the periphery and the bottom surface of the filter pressing mechanism fixed on the frame, and liquid in the slurry is discharged out of the filter pressing mechanism through the filter plates; the top opening of the filter pressing mechanism is provided with the pressing plate in a matching manner, the top surface of the pressing plate is fixedly connected with the telescopic end of the hydraulic cylinder, and the pressing plate can move up and down relative to the inner cavity of the filter pressing mechanism; the cylinder body of pneumatic cylinder is fixed the top of frame, the left hydraulic fluid port of switching-over valve with the rodless chamber intercommunication of pneumatic cylinder, the right hydraulic fluid port of switching-over valve with the pole chamber intercommunication that has of pneumatic cylinder, the feed liquor end of switching-over valve is connected with hydraulic pump and interchange generating device.
Preferably, a stop valve is arranged on the mud pipeline close to the filter pressing mechanism.
Preferably, the filter press further comprises a liquid collecting tank, and liquid in the slurry discharged by the filter plate of the filter press mechanism is collected in the liquid collecting tank.
Preferably, the bottom surface of filter pressing mechanism is provided with down the filter plate, the side is provided with preceding filter plate, back filter plate, left filter plate and right filter plate respectively around filter pressing mechanism, preceding filter plate, back filter plate, left filter plate and right filter plate highly the same.
Preferably, the device further comprises a vibration motor, and the vibration motor is mounted on the top surface of the pressing plate.
Preferably, a pressure sensor is further included, and the pressure sensor is used for detecting the pressure of the upper cavity of the hydraulic cylinder.
Preferably, the hydraulic pump is connected with an unloading overflow valve.
Preferably, the alternating current generating device consists of an energy accumulator, a cylinder body, a piston, a connecting rod, a crankshaft and an alternating current hydraulic driving motor, the alternating current hydraulic driving motor rotates to drive the crankshaft to rotate, the crankshaft drives the connecting rod to swing, the connecting rod drives the piston to reciprocate in the cylinder body, the size of the volume of a closed containing cavity formed by the cylinder body, the piston, the energy accumulator, the one-way valve, the left position of the reversing valve, a rodless cavity of the hydraulic cylinder and a connecting pipeline is changed, the piston can move left and right in the cylinder body, and the components are connected through the pipeline; the connecting rod drives the piston to reciprocate in the cylinder body, and the pressure of the liquid in the containing cavity changes alternately, so that an alternating pressure is output to act on the rodless cavity of the hydraulic cylinder.
The invention also provides a press-filtering forming method of the refractory material blank, which is applied to the press-filtering forming equipment of the refractory material blank, and comprises the following steps:
the initial state of the pressure plate is at the lower part of the inner cavity of the filter pressing mechanism, the hydraulic pump is started, and the unloading overflow valve is in an unloading state;
the first step is as follows: opening a stop valve, starting a slurry pump, injecting slurry in a slurry tank into a filter pressing mechanism through the slurry pump, starting a vibration motor when the pressure plate starts to move upwards under the action of the pressure of the slurry after the slurry contacts with the pressure plate from bottom to top, and closing the vibration motor, the slurry pump and the stop valve until the pressure plate reaches the top edge of the filter pressing mechanism;
the second step is that: when the pressure in the upper cavity of the hydraulic cylinder reaches the upper limit set by the pressure sensor, the hydraulic pump unloads;
the third step: starting the alternating current generating device, driving a pressing plate to discharge liquid in slurry in a forming cavity through a filter plate by a hydraulic cylinder piston under the action of alternating current hydraulic pressure, moving the pressing plate downwards, reducing the pressure of an upper cavity of the hydraulic cylinder, and closing the alternating current generating device when the pressure is reduced to a lower limit set by a pressure sensor;
the fourth step: repeating the second step and the third step until the pressing plate is positioned at the lower part of the inner cavity of the filter pressing mechanism, and closing the alternating current generating device;
the fifth step: when the pressure in the upper cavity of the hydraulic cylinder reaches the upper limit set by the pressure sensor, the hydraulic pump unloads, the hydraulic cylinder is in a pressure maintaining working condition, and the constant pressure is maintained for 10-15 minutes;
and a sixth step: and (3) operating the right position of the reversing valve, feeding high-pressure oil into the lower cavity of the hydraulic cylinder, lifting the hydraulic cylinder, opening the filter plate, and taking out the blank.
Compared with the prior art, the invention has the following beneficial technical effects:
the refractory material blank filter-pressing forming equipment disclosed by the invention realizes solid-liquid separation by adopting an alternating-current filter-pressing mode, can greatly save energy, reduces pollution and simultaneously obtains isotropic, uniform and compact blanks. The blank is machined in a mechanical machining mode, only the shape is changed, and the properties are not changed, so that an isotropic uniform and compact product can be obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a refractory material according to the prior art;
FIG. 2 is a flow of preparation of a refractory material using the filter press molding apparatus of the present application;
FIG. 3 is a schematic diagram showing the overall structure of a press-filtering apparatus for refractory material blanks;
FIG. 4 shows the position of the pressing plate in the initial state;
FIG. 5 is a view showing the state in which the pressing plate filled with slurry in the molding cavity is positioned at the top of the molding cavity;
FIG. 6 is a view of the position of the hold-down plate as it pushes down on the mud-formed blank;
wherein, 1-a mud tank; 2-a slurry pump; 3-a stop valve; 4-a liquid collection tank; 5-a frame; 6-lower filter plate; 7-right filter plate; 8-left filter plate; 9-a pressure strip; 10-a vibration motor; 11-a hydraulic cylinder; 12-a diverter valve; 13-a pressure sensor; 14-an alternating current generating device; 15-a one-way valve; 16-relief valves; 17-a hydraulic pump; 18-a motor; a-a forming cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a refractory material blank filter-pressing forming device and a filter-pressing forming method, which aim to solve the problems in the prior art, and the blank is prepared by filter pressing without adding an adhesive, so that the purity of the material can be better ensured; can obtain more compact blank, and the blank is isotropic, and can not produce layering and interlayer defects, so that the quality of the refractory material product can be improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 2 to 6, the present embodiment provides a refractory material blank filter-pressing molding apparatus, which includes a slurry tank 1, a frame 5, a filter-pressing mechanism, a pressing plate 9, a hydraulic cylinder 11, a reversing valve 12, and a hydraulic pump 17, wherein the slurry tank 1 is connected to an inner cavity of the filter-pressing mechanism through a slurry pipeline, and a slurry pump 2 is installed on the slurry pipeline; filter plates are arranged on the periphery and the bottom surface of the filter pressing mechanism fixed on the frame 5, and liquid in the slurry is discharged out of the filter pressing mechanism through the filter plates; a pressing plate 9 is arranged at the opening at the top of the filter pressing mechanism in a matching manner, the top surface of the pressing plate 9 is fixedly connected with the telescopic end of the hydraulic cylinder 11, and the pressing plate 9 can move up and down relative to the inner cavity of the filter pressing mechanism; the cylinder body of the hydraulic cylinder 11 is fixed on the top of the frame 5, the left oil port of the reversing valve 12 is communicated with the rodless cavity of the hydraulic cylinder 11, the right oil port of the reversing valve 12 is communicated with the rod cavity of the hydraulic cylinder 11, and the liquid inlet end of the reversing valve 12 is connected with the hydraulic pump 17 and the alternating current generating device 14.
Specifically, the alternating current generating device 14 is composed of an energy accumulator, a cylinder body, a piston, a connecting rod, a crankshaft and an alternating current hydraulic driving motor, wherein the alternating current hydraulic driving motor rotates to drive the crankshaft to rotate, the crankshaft drives the connecting rod to swing, the connecting rod drives the piston to reciprocate in the cylinder body, the size of the volume of a closed containing cavity composed of the cylinder body, the piston, the energy accumulator, a one-way valve, a left position of a reversing valve, a rodless cavity of a hydraulic cylinder and a connecting pipeline is changed, the piston can move left and right in the cylinder body, and the components are connected through the pipeline; the connecting rod drives the piston to reciprocate in the cylinder body, and the pressure of the liquid in the accommodating cavity changes alternately, so that an alternating pressure is output to act on the rodless cavity of the hydraulic cylinder 11.
Specifically, a stop valve 3 is arranged on the slurry pipeline close to the filter pressing mechanism, and after the forming cavity A of the filter pressing mechanism is filled with slurry, the slurry pump 2 is closed and the stop valve 3 is closed. A liquid collecting tank 4 is arranged below the forming cavity A, and liquid in slurry discharged by a filter plate of the filter pressing mechanism is collected in the liquid collecting tank 4.
In this embodiment, the bottom surface of the filter pressing mechanism is provided with a lower filter plate 6, the front, rear, left and right side surfaces of the filter pressing mechanism are respectively provided with a front filter plate, a rear filter plate, a left filter plate 8 and a right filter plate 7, and the front filter plate, the rear filter plate, the left filter plate 8 and the right filter plate 7 have the same height. In the process of pressing down the pressing plate 9, liquid in the slurry is discharged through the filter plates in all directions, so that the moisture of the refractory material blank prepared by filter pressing is reduced, the blank has certain strength, and the purpose of machining can be achieved.
The working principle of the refractory material blank filter-pressing forming equipment is as follows:
in the initial state, the pressure plate 9 is at the lowest side (the state shown in fig. 4), the hydraulic pump 17 is started, and the unloading overflow valve 16 is in the unloading state.
The first step is as follows: opening stop valve 3, start slush pump 2, pour into the shaping chamber A that comprises lower filter plate 6, left filter plate 8, right filter plate 7, preceding filter plate (not drawn in the figure), back filter plate (not drawn in the figure) and pressure strip 9 into the mud in slush tank 1 through slush pump 2, after mud from up contacting pressure strip 9 down, under the effect of mud pressure, start up pressure strip 9 and move up, at this moment, start vibrating motor 10, until pressure strip 9 reaches the top (the state of figure 5), close vibrating motor 10, close slush pump 2, close stop valve 3.
The second step is that: the left position of the reversing valve 12 works, the electromagnet of the unloading overflow valve 16 is powered off, high-pressure oil output by the hydraulic pump 17 enters the upper cavity of the hydraulic cylinder 11 through the left position of the reversing valve 12, and when the pressure of the upper cavity of the hydraulic cylinder 11 reaches the upper limit set by the pressure sensor 13, the hydraulic pump 17 unloads.
The third step: starting the alternating current generating device 14, under the action of alternating current hydraulic pressure, driving the pressing plate 9 by the piston of the hydraulic cylinder 11 to discharge liquid in slurry in the molding cavity A through the filter plate, moving the pressing plate 9 downwards, reducing the pressure in the upper cavity of the hydraulic cylinder 11, and closing the alternating current generating device 14 when the pressure is reduced to the lower limit set by the pressure sensor 13.
The fourth step: the second and third steps are repeated until the compacting plate 9 is in the lowermost position (fig. 6), and the ac generating device 14 is turned off.
The fifth step: when the left position of the reversing valve 12 works, the electromagnet of the unloading overflow valve 16 is powered off, high-pressure oil output by the hydraulic pump 17 enters the upper cavity of the hydraulic cylinder 11 through the left position of the reversing valve 12, when the pressure of the upper cavity of the hydraulic cylinder 11 reaches the upper limit set by the pressure sensor 13, the hydraulic pump 17 is unloaded, the hydraulic cylinder 11 is in a pressure maintaining working condition, and the constant pressure is kept for 10-15 minutes.
And a sixth step: the right position of the reversing valve 12 is operated, high pressure oil is fed into the lower cavity of the hydraulic cylinder 11, the hydraulic cylinder 11 is slightly lifted, the filter plate is opened, and the blank is taken out (the specific taking-out process is not related to forming, and is not discussed in detail here).
The refractory material blank filter-pressing forming equipment replaces the original procedures of granulation and press forming by using filter-pressing to prepare blanks, drying and machining forming. The blank is prepared by filter pressing, and no adhesive is added, so that the purity of the material can be ensured; the blank is prepared by filter pressing, so that a more compact blank can be obtained, the blank is isotropic, and the defects of layering and interlayer are avoided, so that the quality of a refractory material product is improved; the blank is prepared by filter pressing, and the filter pressing time can be effectively shortened, the energy consumption is reduced, and the energy is saved by means of alternating-current hydraulic filter pressing. The drying step is to further reduce the moisture content of the refractory material blank obtained by press filtration, so that the blank has a certain strength and can be machined. The machining process only changes the shape of the blank and does not change the performance of the blank.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (8)

1. The utility model provides a refractory material blank filter-pressing former which characterized in that: the mud filter comprises a mud tank, a frame, a filter pressing mechanism, a pressing plate, a hydraulic cylinder, a reversing valve and a hydraulic pump, wherein the mud tank is connected with an inner cavity of the filter pressing mechanism through a mud pipeline, and a mud pump is arranged on the mud pipeline; filter plates are arranged on the periphery and the bottom surface of the filter pressing mechanism fixed on the frame, and liquid in the slurry is discharged out of the filter pressing mechanism through the filter plates; the top opening of the filter pressing mechanism is provided with the pressing plate in a matching manner, the top surface of the pressing plate is fixedly connected with the telescopic end of the hydraulic cylinder, and the pressing plate can move up and down relative to the inner cavity of the filter pressing mechanism; the cylinder body of pneumatic cylinder is fixed the top of frame, the left hydraulic fluid port of switching-over valve with the rodless chamber intercommunication of pneumatic cylinder, the right hydraulic fluid port of switching-over valve with the pole chamber intercommunication that has of pneumatic cylinder, the feed liquor end of switching-over valve is connected with hydraulic pump and interchange generating device.
2. A refractory blank filter-press forming apparatus as in claim 1 wherein: and a stop valve is arranged on the mud pipeline close to the filter pressing mechanism.
3. A refractory blank filter-press forming apparatus as in claim 1 wherein: the filter press also comprises a liquid collecting tank, and liquid in the slurry discharged by the filter plate of the filter press mechanism is collected into the liquid collecting tank.
4. A refractory blank filter-press forming apparatus as in claim 1 wherein: the bottom surface of filter pressing mechanism is provided with down the filter plate, the side is provided with preceding filter plate, back filter plate, left filter plate and right filter plate respectively all around filter pressing mechanism, preceding filter plate, back filter plate, left filter plate and right filter plate highly the same.
5. A refractory blank filter-press forming apparatus as in claim 1 wherein: still include vibrating motor, vibrating motor installs the top surface of pressure strip.
6. A refractory blank filter-press forming apparatus as in claim 1 wherein: the hydraulic cylinder pressure detection device further comprises a pressure sensor, and the pressure sensor is used for detecting the pressure of the upper cavity of the hydraulic cylinder.
7. A refractory blank filter-press forming apparatus as in claim 1 wherein: the hydraulic pump is connected with an unloading overflow valve.
8. A press-filtering forming method of a refractory blank applied to the refractory blank forming press-filtering apparatus of any one of claims 1 to 7, comprising the steps of:
the initial state of the pressure plate is at the lower part of the inner cavity of the filter pressing mechanism, the hydraulic pump is started, and the unloading overflow valve is in an unloading state;
the first step is as follows: opening a stop valve, starting a slurry pump, injecting slurry in a slurry tank into a filter pressing mechanism through the slurry pump, starting a vibration motor when the pressure plate starts to move upwards under the action of the pressure of the slurry after the slurry contacts with the pressure plate from bottom to top, and closing the vibration motor, the slurry pump and the stop valve until the pressure plate reaches the top edge of the filter pressing mechanism;
the second step is that: when the pressure in the upper cavity of the hydraulic cylinder reaches the upper limit set by the pressure sensor, the hydraulic pump unloads;
the third step: starting the alternating current generating device, driving a pressing plate to discharge liquid in slurry in a forming cavity through a filter plate by a hydraulic cylinder piston under the action of alternating current hydraulic pressure, moving the pressing plate downwards, reducing the pressure of an upper cavity of the hydraulic cylinder, and closing the alternating current generating device when the pressure is reduced to a lower limit set by a pressure sensor;
the fourth step: repeating the second step and the third step until the pressing plate is positioned at the lower part of the inner cavity of the filter pressing mechanism, and closing the alternating current generating device;
the fifth step: when the pressure in the upper cavity of the hydraulic cylinder reaches the upper limit set by the pressure sensor, the hydraulic pump unloads, the hydraulic cylinder is in a pressure maintaining working condition, and the constant pressure is maintained for 10-15 minutes;
and a sixth step: and (3) operating the right position of the reversing valve, feeding high-pressure oil into the lower cavity of the hydraulic cylinder, lifting the hydraulic cylinder, opening the filter plate, and taking out the blank.
CN202010883508.6A 2020-08-28 2020-08-28 Press-filtering forming equipment and press-filtering forming method for refractory material blank Pending CN111958761A (en)

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CN202010883508.6A CN111958761A (en) 2020-08-28 2020-08-28 Press-filtering forming equipment and press-filtering forming method for refractory material blank

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CN202010883508.6A CN111958761A (en) 2020-08-28 2020-08-28 Press-filtering forming equipment and press-filtering forming method for refractory material blank

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020070368A1 (en) * 2000-12-07 2002-06-13 Rountree Steven P. Hydraulic system for actuation of a measurement-while-drilling mud valve
CN107583333A (en) * 2017-10-19 2018-01-16 中冶北方（大连）工程技术有限公司 A kind of disk filter experimental simulation device
CN109253129A (en) * 2017-07-12 2019-01-22 上海宝钢工业技术服务有限公司 The test macro and method of radial forging machine main hydraulic cylinder
CN209489448U (en) * 2018-11-22 2019-10-15 云南俏生源食品有限公司 A kind of konjaku filter press
CN111288031A (en) * 2020-02-21 2020-06-16 太原理工大学 Alternating hydraulic pressure generating device and filter press

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020070368A1 (en) * 2000-12-07 2002-06-13 Rountree Steven P. Hydraulic system for actuation of a measurement-while-drilling mud valve
CN109253129A (en) * 2017-07-12 2019-01-22 上海宝钢工业技术服务有限公司 The test macro and method of radial forging machine main hydraulic cylinder
CN107583333A (en) * 2017-10-19 2018-01-16 中冶北方（大连）工程技术有限公司 A kind of disk filter experimental simulation device
CN209489448U (en) * 2018-11-22 2019-10-15 云南俏生源食品有限公司 A kind of konjaku filter press
CN111288031A (en) * 2020-02-21 2020-06-16 太原理工大学 Alternating hydraulic pressure generating device and filter press

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