CN201645606U - Hydraulic control system of full-automatic flyash tile press - Google Patents
Hydraulic control system of full-automatic flyash tile press Download PDFInfo
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- CN201645606U CN201645606U CN2010201628138U CN201020162813U CN201645606U CN 201645606 U CN201645606 U CN 201645606U CN 2010201628138 U CN2010201628138 U CN 2010201628138U CN 201020162813 U CN201020162813 U CN 201020162813U CN 201645606 U CN201645606 U CN 201645606U
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Abstract
The utility model relates to a hydraulic control system of a full-automatic flyash tile press, which comprises a control pump unit and is technically characterized in that the control pump unit is a double pump, the output end of the first pump is connected with a P1 port of an oil-way control integration module by a pressure oil filter, the P1 port is respectively connected with a stack pilot overflow valve, a variable pump control module and an energy accumulator, the output ends of the stack pilot overflow valve and the variable pump control module are connected with a constant-power variable plunger pump; and the output end of the second pump is connected with a P2 port of the oil-way control integration module, the P2 port is connected with the input end of a charging valve control module and the output end of the oil-way control integration module is connected with a charging valve. The hydraulic control system adopts the double pump for controlling the constant-power variable plunger pump and the charging valve respectively, ensures the stability of output pressure and flow of the pump, improves tile pressing speed and quality, and simultaneously extends the application range of the tile press.
Description
Technical field
The utility model belongs to the hydraulic control field, the full-automatic brick machine hydraulic control system of especially a kind of flyash.
Background technology
In recent years, China uses the production of flyash brick substitute for clay brick gradually.The annual discharge rate of the flyash of China power plant is about 1.2 hundred million tons, utilization is about 0.7 ton, do not utilize as yet and be about 0.5 hundred million tons, therefore, producing flyash brick is an effective way handling power plant fly ash, both the power plant environmental issue can be solved, the building material of high-quality environmental protection can be produced again.
At present, 1400 tons of flyash brick press groups that the manufacturer of domestic flyash brick adopts German Lars gram company to produce usually, wherein hydraulic control system is produced by German REXROTH company, this cover brick machine automaticity is high, its pressure can reach 1000 tons, speed be 32 16 seconds, annual production can reach ten thousand of 5000-6000.But, there are the following problems for the production at home of this flyash brick press: (1) is because this brick machine is produced design at Germany, and the flyash major ingredient composition and the humidity of the flyash major ingredient composition of China and humidity and Germany have very big difference, the flyash major ingredient of Germany is very dry, and the flyash major ingredient of China is very wet, therefore, in Chinese domestic production process, the control rate of this brick machine hydraulic control system is restricted, 16 seconds speed of original 32 bricks is inaccessible, and system pressure and productive temp all are affected; (2) the HYDRAULIC CONTROL SYSTEM pump of this brick machine has only single pump control, this control pump should be controlled the switching of prefill valve, the pressure of controlling the guide proportion overflow valve again is to adjust the output flow of Variable plunger pump, when quick suppression process, big pump and prefill valve are in the lump when the master cylinder fuel feeding, because changing, the instantaneous opening pressure of prefill valve causes pump guide proportion overflow greatly more greatly, cause the controlled pressure of prefill valve to produce fluctuation, amplitude reaches 30% sometimes, its consequence causes the decline of big oil pump feed amount, making and press the quality of brick to be subjected to considerable influence, is deformed when brick extrudes when serious.
Summary of the invention
Be to overcome the deficiencies in the prior art order of the present utility model, propose a kind of reasonable in design, adopt duplex pump that hydraulic system is controlled to guarantee to press the full-automatic brick machine hydraulic control system of flyash of brick speed and quality.
The utility model solves its technical problem and takes following technical scheme to realize:
The full-automatic brick machine hydraulic control system of a kind of flyash, by oil circuit control integration module, prefill valve, the prefill valve control module, permanent power and variable plunger displacement pump, the variable pump control module, the stack pilot operated compound relief valve, press oil strainer, control pump group and main fuel tank connect and compose, described control pump group is a duplex pump, first delivery side of pump is connected with the P1 port of oil circuit control integration module through pressing oil strainer, the P1 port respectively with the stack pilot operated compound relief valve, variable pump control module and accumulator are connected, this pilot operated compound relief valve that superposes, the output of variable pump control module is connected with permanent power and variable plunger displacement pump; Second delivery side of pump is connected with the P2 port of oil circuit control integration module, and the P2 port is connected with the input of prefill valve control module, and the output of this oil circuit control integration module is connected with prefill valve.
And described variable pump control module is connected and composed successively by damping hole, pilot proportional overflow valve and stack overflow valve.
And described damping hole is made of two damping hole series connection that are respectively 1.0mm and 0.6mm.
And described prefill valve control module is connected and composed successively by superposing type overflow valve, superposing type Double throttle check valve and solenoid directional control valve.
Advantage of the present utility model and good effect are:
This hydraulic control system adopts the control pump group of duplex pump, one group of pump is used for the variable swash plate of control variables plunger displacement pump specially, another group pump is used for opening and closing prefill valve specially, every group of delivery side of pump all has one group of overflow valve to guarantee the stable of its output, even prefill valve is opened simultaneously in pressure process like this, because the existing overflow valve in this road guarantees its working pressure, so can not bring influence to the pressure of the used guide proportion valve of control pump, so the output pressure and the flow of pump all are quite stables, thereby improved pressure brick speed and quality, enlarged the brick machine scope of application simultaneously.
Description of drawings
Fig. 1 is a square frame connection diagram of the present utility model;
Fig. 2 is a connection diagram of the present utility model;
Fig. 3 is the connection diagram of existing hydraulic control system.
The specific embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described.
The full-automatic brick machine hydraulic control system of a kind of flyash, as shown in Figure 1, connect and compose by oil circuit control integration module, prefill valve, prefill valve control module, permanent power and variable plunger displacement pump, variable pump control module, stack pilot operated compound relief valve, pressure oil strainer, control pump group and main fuel tank.The control pump group of this control system is a duplex pump, first pump is used to control permanent power plunger displacement pump, its concrete control mode is: first delivery side of pump is connected with the P1 port of oil circuit control integration module through pressing oil strainer, the P1 port of this oil circuit control integration module by oil circuit control integration module respectively with the stack pilot operated compound relief valve, the variable pump control module, and the input of accumulator is connected, the stack pilot operated compound relief valve, the output of variable pump control module is connected with permanent power and variable plunger displacement pump respectively by oil circuit control integration module, realization is to the pressure control of permanent power and variable plunger displacement pump, that is: pressure oil carries out the pressure adjustment by the stack pilot operated compound relief valve after the A3 port of oil circuit control integration module provides X2 controlled pressure for permanent power and variable plunger displacement pump, carry out the pressure adjustment and X1 controlled pressure and X3 controlled pressure are provided for permanent power and variable plunger displacement pump by the variable pump control module through the A2 and the B2 port of oil circuit control integration module, this variable pump control module is by damping hole, pilot proportional overflow valve and stack overflow valve connect and compose, and this damping hole is in series by two damping holes that are respectively 1.0mm and 0.6mm.Second pump is used to control prefill valve, its concrete control mode is: second delivery side of pump is connected with the P2 port of oil circuit control integration module, the P2 port of control integration module is connected with the prefill valve control module by oil circuit control integration module, the output of prefill valve control module is connected with prefill valve by oil circuit control integration module, being pressure oil carries out the pressure adjustment and is connected with prefill valve with the AB1 port through the A1 of oil circuit control integration module being used to control prefill valve by the prefill valve control module, and this prefill valve control module is by the superposing type overflow valve, superposing type Double throttle check valve and solenoid directional control valve connect and compose successively.
Be that example describes with German Lars gram brick machine below, Fig. 3 is the hydraulic control system connection diagram of German Lars gram brick machine.The operation principle of this hydraulic control system is: the control pump group comprises gear pump 4.0 and motor 5.0, this pump group power of motor is 7.5KW, the gear pump discharge capacity is 10cc/r, pressure is 16Mpa, the pump pressure oil output enters the P mouth of oil circuit control integration module behind the motor start-up through pressure oil filter 7.0, by overflow valve 8.0 the P mouth pressure is adjusted to 5Mpa through the P mouth, be divided into two the tunnel then: (1) first via through the A3 mouth of oil circuit control integration module give the permanent power and variable plunger displacement pump of REXROTH provide the X2 controlled pressure (〉=4Mpa), this road provides X1 through P1.1 to Variable plunger pump, the controlled pressure of X3 and provide controlled pressure to prefill valve through P1.2.Because the variation of POF is the angle by the variable swash plate of pump to be changed and controls, therefore the maximum pendulum angle of pump swash plate is maximum pump discharge Vgmax, the minimum swash angle of pump swash plate is minimum injection rate Vgmin, and that control pump swash plate pivot angle is built-in mechanical hydraulic servo valve A, its external control pressure is X1, this pump is limited in 4-15bar with the scope of the controlled pressure X1 of this valve in dispatching from the factory, be the minimum injection rate of pump during X1=4bar promptly, is the maximum pump discharge of pump during X1=15bar.X1 is by P1.1 controlled pressure of (being reduced to the variable pressure 0.4-1.5Mpa of pump by 5Mpa) after guide proportion pressure-reducing valve 10.0 decompression, the rod spring of this pressure and variable cylinder C is one group of pressure balance body, X1 increases that then the swash plate angle is then big, the output flow of pump strengthens, otherwise then the output flow of pump reduces, and sees the stable decisive role that plays of stable output to pump of X1 from this point.X3 is the adjustment pressure of the built-in overflow valve of pump, and its force value should exceed 2Mpa drain charge thus when guaranteeing whole press pressure overburden lotus than system pressure, guarantees the safety of equipment.(2) secondary route P1.2 point is controlled the A1 of integration module, the switching that the B1 two-port is controlled prefill valve by oil circuit again through solenoid directional control valve 11.0 and flow speed control valve 12.0.Because when prefill valve is opened, its inflow-rate of water turbine is 3600l/min, the inflow-rate of water turbine of its super large causes the transient fluctuation of P1.2 point pressure, must be fed through in same oil duct by P1.1 and P1.2, this moment, the inlet pressure P of guide proportion pressure-reducing valve must cause the pressure of its dirty (outlet) to change, and the transient fluctuation of X1 is also just unavoidable so.
This hydraulic control system is the improvement of carrying out at the problems referred to above, as shown in Figure 2, this hydraulic control oil circuit is divided into two parts: (1) P1 partly is the control section of permanent power and variable plunger displacement pump, the difference of this part control system and existing hydraulic control system is: adopt pilot proportional overflow valve 10.0 to replace the proportional pressure-reducing valve in the original system in the variable pump control module, and, strengthened the stability of X1 controlled pressure so greatly with the use of before proportional pressure control valve, connecting of 1.0mm and two damping holes 14.0 of 0.6mm.(2) control section that partly opens and closes of P2 for prefill valve, because P1 and P2 are controlled by the overflow valve of two different pressures grades respectively, so though the unlatching of prefill valve has the pressure of moment to fall, can not have influence on P1 yet, the unaffected then overflow valve of P1 inlet pressure P1.1 then can not be affected, so the X1 pressure natural stability of process damping hole and the control of guide proportion overflow valve.Because the stable output of X1, then the pressure of pump and flow are also relatively stable, and its final result is the pressure brick quality of press and the quality standard that standard surpasses national regulation comprehensively.
It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the specific embodiment; every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (4)
1. full-automatic brick machine hydraulic control system of flyash, by oil circuit control integration module, prefill valve, the prefill valve control module, permanent power and variable plunger displacement pump, the variable pump control module, the stack pilot operated compound relief valve, press oil strainer, control pump group and main fuel tank connect and compose, it is characterized in that: described control pump group is a duplex pump, first delivery side of pump is connected with the P1 port of oil circuit control integration module through pressing oil strainer, the P1 port respectively with the stack pilot operated compound relief valve, variable pump control module and accumulator are connected, this pilot operated compound relief valve that superposes, the output of variable pump control module is connected with permanent power and variable plunger displacement pump; Second delivery side of pump is connected with the P2 port of oil circuit control integration module, and the P2 port is connected with the input of prefill valve control module, and the output of this oil circuit control integration module is connected with prefill valve.
2. the full-automatic brick machine hydraulic control system of flyash according to claim 1 is characterized in that: described variable pump control module is connected and composed successively by damping hole, pilot proportional overflow valve and stack overflow valve.
3. the full-automatic brick machine hydraulic control system of flyash according to claim 2 is characterized in that: described damping hole is made of two damping hole series connection that are respectively 1.0mm and 0.6mm.
4. the full-automatic brick machine hydraulic control system of flyash according to claim 1 is characterized in that: described prefill valve control module is connected and composed successively by superposing type overflow valve, superposing type Double throttle check valve and solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201628138U CN201645606U (en) | 2010-04-19 | 2010-04-19 | Hydraulic control system of full-automatic flyash tile press |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201628138U CN201645606U (en) | 2010-04-19 | 2010-04-19 | Hydraulic control system of full-automatic flyash tile press |
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| CN201645606U true CN201645606U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201628138U Expired - Fee Related CN201645606U (en) | 2010-04-19 | 2010-04-19 | Hydraulic control system of full-automatic flyash tile press |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501401A (en) * | 2011-10-29 | 2012-06-20 | 洛阳中冶重工机械有限公司 | Molding pressure control system for hydraulic molding machine and control method thereof |
-
2010
- 2010-04-19 CN CN2010201628138U patent/CN201645606U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501401A (en) * | 2011-10-29 | 2012-06-20 | 洛阳中冶重工机械有限公司 | Molding pressure control system for hydraulic molding machine and control method thereof |
| CN102501401B (en) * | 2011-10-29 | 2014-04-09 | 洛阳中冶重工机械有限公司 | Molding pressure control system for hydraulic molding machine and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Tianjin City Oman Hydraulic Circuit Engineering Co., Ltd. Assignor: Tianjin Oulu Heavy Machinery Manufacturing Co., Ltd. Contract record no.: 2011120000219 Denomination of utility model: Hydraulic control system of full-automatic flyash tile press Granted publication date: 20101124 License type: Exclusive License Record date: 20111025 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130419 |