CN202881299U - Hydraulic control loop for revolving mud gun of blast furnace cast house - Google Patents
Hydraulic control loop for revolving mud gun of blast furnace cast house Download PDFInfo
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- CN202881299U CN202881299U CN 201220593785 CN201220593785U CN202881299U CN 202881299 U CN202881299 U CN 202881299U CN 201220593785 CN201220593785 CN 201220593785 CN 201220593785 U CN201220593785 U CN 201220593785U CN 202881299 U CN202881299 U CN 202881299U
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Abstract
The utility model discloses a hydraulic control loop for revolving a mud gun of a blast furnace cast house. The control loop circuit comprises a safety control loop, an action control loop, and a plugging pressure-maintaining control loop, wherein oil return pipes of three loops are communicated with a main oil return pipe of the system. A discharge port of a leaking-type overflow valve is connected to a cavity B of a valve for controlling on/off of an oil way; the cavity B is connected to a return opening; and the action control loop forms a differential loop through the overflow valve between the cavity A and the cavity B of the cylinder arranged behind the valve of controlling on/off of the oil way. The hydraulic control loop not only can adapt with the requirement of an action of load change in the process of revolving the mud gun, radically prevents the device from being affected by negative load, and prevents the cylinder from generating the suction phenomenon. Therefore, the reliability and the safety of the entire control system are greatly improved.
Description
Technical field
The utility model relates to a kind of hydraulic control system.
Background technology
Clay gun is the key equipment of blast furnace or other ironmaking equipments, and its function is behind blast furnace casting, drives with the barrel compacted iron mouth of playing the mud cylinder with turning the big gun cylinder, with beating mud cylinder extruding stemming, injects in the iron mouth iron notch is clogging immediately.Because it is large that Hydraulic clay gun has the mud thrust of beating, compact construction, convenient operation, the advantages such as existence buffering that fluid is intrinsic have replaced electric clay gun, become the unique selection of present blast furnace gun.In the control of Hydraulic clay gun, the action that turns the gun oil cylinder is the most complicated, needs the factor of consideration many, and whether can the proper dozen mud cylinder that also is related to normally beat mud in its control, is the key in the clay gun hydraulic control circuit.
It is of a great variety that present clay gun turns the big gun control loop, wherein with the loop of differentiating control because of energy-conservation, economic reason is used more, sees Fig. 1, a kind of clay gun revolution hydraulic control circuit, this is that German TMT company uses maximum comparatively ripe control loops at present.It forms differential circuit by the surplus valve 1-8 that is connected to oil cylinder B chamber and reversing valve 1-7P mouth, and the setting pressure reduction of surplus valve 1-8 has prevented the generation of load so that turn that the cylinder rod cavity pressure is higher than rodless cavity all the time in the big gun process.The effect of sequence valve 1-9 is the differential big gun end of processing that turns, and behind the big gun mouth contact iron mouth, lays down the bar cavity pressure, and the pressure energy that turns the gun oil cylinder is all acted on the iron mouth.Add safety and pressure dwelling loop, this loop is safe and reliable, can satisfy the action request of clay gun.But also there are some problems:
Since differential circuit be by the fluid in B chamber through the P chamber, enter that the A chamber forms, have to use the larger reversing valve of latus rectum, cost is higher.
2. the throttling valve 1-24.1 among Fig. 1 is essential, otherwise the pressure in surplus valve 1-8 A chamber is exactly system pressure (pump discharge pressure), because the pressure ratio A chamber in B chamber is high, sequence valve 1-9 will be opened in turning the big gun process, does not realize the function of differentiating control at all.So, in case customer requirements changes manually operated directional valve into proportional direction valve or manual proportional valve, to realize turning in the big gun process control to speed, as shown in Figure 2, this control loop will go wrong, in case to be lower than the setting speed of throttling valve 1-24.1 more because of the speed of proportional valve control, throttling valve 1-24.1 does not have the effect of " isolation " system oil pressure, the pressure in B chamber will back down sequence valve 1-9, and system can lose differential function equally.When serious in addition can differential and lose differential between repeatedly, have a strong impact on the big gun process that turns.
The utility model content
The purpose of this utility model provides a kind of hydraulic control system that clay gun turns the big gun action of controlling, this system has and really agrees with the action feature that clay gun turns big gun, control safe and reliablely, adapt to multiple throttling scheme, and can save the clay gun hydraulic control circuit of manufacturing cost.
To achieve these goals, the utility model adopts following technical scheme: a kind of blast furnace discharge yard clay gun turns the big gun hydraulic control circuit, and described control loop comprises: safe control loop; The action control loop; The holding pressure control of blocking up loop, wherein safe control loop is made on the large valve piece that valve piece form is installed in the action control loop, inside has asphalt channel to connect, the holding pressure control of blocking up loop links to each other with the action control loop by hydraulicefficiency pipeline, and the action control loop is communicated with the clay gun angling cylinder by the hydraulicefficiency pipeline with one-way throttle valve and ball valve; The used oil pipe in three loops all communicates with system master's used oil pipe; It is characterized in that: the drain tap of the surplus valve of the type that leaks is connected to the B chamber of the valve of oil circuit control break-make, the B chamber takes back oil, valve afterwards oil cylinder A, surplus valve formation differential circuit B chamber between of described action control loop by being installed in the oil circuit control break-make.
The valve of described oil circuit control break-make is manually operated directional valve.
The valve of described oil circuit control break-make is manual proportional valve or proportional direction valve, and manually the front portion of proportional valve or proportional direction valve is provided with pilot valve.
Compare with prior art both domestic and external, this utility model technology has the following advantages:
(1) use this system after, the action that turns barrel in the big gun whole process at clay gun can be controlled effectively.From the clay gun closed position to stagnation point, from stagnation point to turning the big gun process near the iron mouth, the back pressure in meter in and bar chamber makes oil cylinder turn the gun oil cylinder all the time can steady and in check motion, avoids cylinder movement speed affected by load variations, and oil cylinder is inhaled empty phenomenon when having avoided load.When oil cylinder bump iron mouth, the rod chamber pressure of angling cylinder can be laid down immediately, is applied on the iron mouth so that turn all snap-in forces of gun oil cylinder, has guaranteed that the action of next step dozen mud is implemented smoothly.
(2) by the design of differential circuit, be not only the flow that has reduced system's fuel feeding, simultaneously, because differential circuit is arranged on after the reversing valve, so that the latus rectum of reversing valve greatly reduces, further saved investment, reduced energy consumption.
(3) be because differential circuit is arranged on reversing valve mentality of designing afterwards equally, so that after reversing valve being changed into proportional reversing valve or manual proportional valve, all functions of this system and advantage can exist.Illustrate that this system has widely adaptability.
Description of drawings
Fig. 1 is the schematic diagram that clay gun revolution hydraulic control circuit adopts the reversing valve class in the prior art;
Fig. 2 is the schematic diagram of clay gun revolution hydraulic control circuit adoption rate valve class in the prior art;
Fig. 3 is the schematic diagram of the utility model embodiment 1;
Fig. 4 is the schematic diagram of the utility model embodiment 2.
Embodiment
Below in conjunction with accompanying drawing implementation of the present utility model is described further:
Embodiment 1
As shown in Figure 3:
This hydraulic control circuit comprises: safe control loop A; Clay gun turns big gun action control loop B; The holding pressure control of blocking up loop C.Safe control loop A is made into valve piece form and is installed on the large valve piece that clay gun turns big gun action control loop B, inside has asphalt channel to connect, pressure dwelling loop C turns big gun action control loop B by hydraulicefficiency pipeline and clay gun and links to each other, clay gun turns big gun action control loop B by one-way throttle valve 2-11, and ball valve 2-1.2, ball valve 2-23.1 hydraulicefficiency pipeline are communicated with the clay gun angling cylinder.The used oil pipe in three loops all communicates with the master of system used oil pipe T.
In the present embodiment, hydraulic cylinder component reaches the clay gun rotary cylinder and communicates with hydraulic control circuit B by hydraulicefficiency pipeline, and all devices inner chamber and pipeline have washed complete, meet system's degree of cleaning requirement; The angling cylinder required drive is provided by the constant pressure oil source of cleaning, and constant pressure oil source enough provides the clay gun angling cylinder to move needed flow and pressure.
This clay gun revolution hydraulic control system is as follows in the specific works process within a work period:
As shown in Figure 4, clay gun turns round this action, when clay gun forwards (position of stopping is to working position), promote the handle of manually operated directional valve 2-7 this moment, makes its access loop, right position, and the P mouth of manually operated directional valve 2-7 and A mouth are connected, T mouth and B mouth are connected, enter into the rodless cavity of clay gun angling cylinder by reversing valve P mouth to A mouth by overbalance valve, ball valve through the pressure oil of throttling valve 2-24.1 first, thereby the promoting turning oil cylinder piston rod is protruding, clay gun is turned round to the working position by position of rest; This moment, angling cylinder rodless cavity input pressure was less than one way sequence valve 2-9 set pressure (rodless cavity communicates with the sequence valve outside control mouth), one way sequence valve 2-9 does not open, so all entering after the A mouth by surplus valve 2-8, manually operated directional valve 2-7, rod chamber fluid turns gun oil cylinder rod chamber, form differential circuit, (thereby the drain tap Y of surplus valve 2-8 receives the B chamber of manually operated directional valve 2-7 to the velocity of rotation of raising clay gun, this moment, the B chamber took back oil, so that surplus valve can be by the normal overflow of set pressure); Note, in the clay gun turning course, load pressure is also little, but when clay gun arrived the working position, namely behind clay gun gun muzzle bump iron mouth, this moment, rodless cavity pressure increased suddenly, when pressure surpasses the set pressure of one way sequence valve 2-9, by outside control mouth one way sequence valve 2-9 is opened, the fluid in the rod chamber is connected the pressure release of bar chamber by B mouth, T mouth and the oil return circuit of one way sequence valve 2-9, manually operated directional valve 2-7 at this moment.The key point in this loop is that it is differential turning in the big gun process, and must allow the release of cylinder rod chamber behind the contact iron mouth, and strong could all the acting on the iron mouth of oil cylinder makes gun muzzle be close to the iron mouth like this, in order to avoid beat mud hourglass mud.
In order to reach this purpose, throttling valve 2-24.1, surplus valve 2-8, the setting of sequence valve one way sequence valve 2-9 is particularly important, at first, one way sequence valve 2-9 to be set up rest position when debugging this loop, throttling valve 2-24.1 adjusts to first the less position of flow, promoting manually operated directional valve 2-7 turns round forward clay gun, the pressure difference value that regulation relief valve 2-8 makes oil cylinder rodless cavity and rod chamber in turning course is to about the 5MPa, and turning period clocked, repeat to turn round action in order to throttling valve 2-24.1 adjusted to the aperture that needs.Then, when clay gun revolution puts in place, one way sequence valve 2-9 being carried out meticulous adjusting, one way sequence valve 2-9 is opened gradually, adjust to the degree that bar chamber oil pressure just can fast pressure relief, is exactly the only pressore setting of one way sequence valve 2-9.
The effect of throttling valve 2-24.1 is not only to set up the rotating time of clay gun, and it also has the effect of barrier systems pressure, and the existence of throttling valve 2-24.1 is so that in turning course, the oil circuit pressure after this valve all is relevant with the load of oil cylinder.Otherwise, the pressure that turns oil cylinder rodless cavity in the big gun process will approach with system pressure, because the pressure of the effect rodless cavity of surplus valve 2-8 will surpass the set pressure of one way sequence valve 2-9, in turning the big gun process, just opened one way sequence valve 2-9, do not become differential circuit at all.If transfer the opening pressure of one way sequence valve 2-9 very high in order to form differential circuit, revolution end cylinder rod chamber again can't release so.
Clay gun backward rotating course of action is as follows: usually after the release of mud spray gun plugging; clay gun will turn round backward and get back to the aircraft gate; promote manually operated directional valve this moment and make access loop, the left position of manually operated directional valve 2-7; pressure oil is through the B chamber of reversing valve; by the check valve of one way sequence valve 2-9, ball valve 2-23.1 enters the cylinder rod chamber, and the oil pressure of rodless cavity is through ball valve 2-1.2, throttling valve 2-11; equilibrium valve 2-10, the A chamber oil return of reversing valve 2-7.
Need to prove: 1. the B chamber of receiving reversing valve owing to the control port of equilibrium valve, this moment, equilibrium valve was opened, and fluid can flow to the A mouth from the B mouth of equilibrium valve.2. because the drain tap Y of surplus valve 2-8 also is the B chamber of receiving manually operated directional valve 2-7, when the logical pressure oil in the B chamber of manually operated directional valve 2-7, surplus valve cuts out, and the fluid in bar chamber can't be switched to rodless cavity, has guaranteed that the clay gun rotary cylinder turns the smooth realization of big gun fallback action.
The effect of loop A is when bar chamber, loop and rodless cavity generation superpressure phenomenon, play release and give the effect of another chamber repairing, so the pressure of surplus valve should be adjusted slightly higherly than system pressure.
The effect of loop C is that the mud spray gun plugging finishes, and when " vexed big gun " reversing valve 2-14 is shifted onto right position, with the interior high-pressure oil of energy storage so that the oil pressure of rodless cavity remains at high pressure.
Embodiment 2: as shown in Figure 3, change the manually operated directional valve 2-7 among Fig. 4 into manual proportional valve 3-7, remove the throttling valve 2-24.1 of P tube inlet, all the other are constant.The difference of this implementation column and embodiment 1 is the pilot valve 3-39.1 control of speed by manual proportional valve 3-7 that turns in the big gun process, and in addition, course of action and adjustment method and embodiment 1 are in full accord.
The manual proportional valve that the utility model uses also can substitute with electro-hydraulic proportional valve; throttling valve before the manually operated directional valve also can design after reversing valve; before the differential circuit; in addition; the Design Mode that manually operated directional valve adds the oil-feed throttling also can be revised as the pattern that electro-hydraulic reversing valve adds the oil-feed throttling, and similar this conversion all drops within the protection domain of the present utility model.
Claims (3)
1. a blast furnace discharge yard clay gun turns the big gun hydraulic control circuit, and described control loop comprises: safe control loop; The action control loop; The holding pressure control of blocking up loop, wherein safe control loop is made on the large valve piece that valve piece form is installed in the action control loop, inside has asphalt channel to connect, the holding pressure control of blocking up loop links to each other with the action control loop by hydraulicefficiency pipeline, and the action control loop is communicated with the clay gun angling cylinder by the hydraulicefficiency pipeline with one-way throttle valve and ball valve; The used oil pipe in three loops all communicates with system master's used oil pipe; It is characterized in that: the drain tap of the surplus valve of the type that leaks is connected to the B chamber of the valve of oil circuit control break-make, the B chamber takes back oil, valve afterwards oil cylinder A, surplus valve formation differential circuit B chamber between of described action control loop by being installed in the oil circuit control break-make.
2. blast furnace discharge yard clay gun as claimed in claim 1 turns the big gun hydraulic control circuit, it is characterized in that: the valve of described oil circuit control break-make is manually operated directional valve.
3. blast furnace discharge yard clay gun as claimed in claim 1 turns the big gun hydraulic control circuit, it is characterized in that: the valve of described oil circuit control break-make is manual proportional valve or proportional direction valve, and manually the front portion of proportional valve or proportional direction valve is provided with pilot valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220593785 CN202881299U (en) | 2012-11-12 | 2012-11-12 | Hydraulic control loop for revolving mud gun of blast furnace cast house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220593785 CN202881299U (en) | 2012-11-12 | 2012-11-12 | Hydraulic control loop for revolving mud gun of blast furnace cast house |
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| Publication Number | Publication Date |
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| CN202881299U true CN202881299U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220593785 Expired - Lifetime CN202881299U (en) | 2012-11-12 | 2012-11-12 | Hydraulic control loop for revolving mud gun of blast furnace cast house |
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| CN (1) | CN202881299U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604623A (en) * | 2021-08-30 | 2021-11-05 | 中钢集团西安重机有限公司 | Differential control loop and control method for hydraulic mud gun |
| CN115820960A (en) * | 2022-10-19 | 2023-03-21 | 北京首钢股份有限公司 | Tapping equipment operation method and system |
-
2012
- 2012-11-12 CN CN 201220593785 patent/CN202881299U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604623A (en) * | 2021-08-30 | 2021-11-05 | 中钢集团西安重机有限公司 | Differential control loop and control method for hydraulic mud gun |
| CN115820960A (en) * | 2022-10-19 | 2023-03-21 | 北京首钢股份有限公司 | Tapping equipment operation method and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |