CN104948188A - Overload protection device for stone cracking equipment - Google Patents
Overload protection device for stone cracking equipment Download PDFInfo
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- CN104948188A CN104948188A CN201510391234.8A CN201510391234A CN104948188A CN 104948188 A CN104948188 A CN 104948188A CN 201510391234 A CN201510391234 A CN 201510391234A CN 104948188 A CN104948188 A CN 104948188A
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Abstract
The invention relates to exploitation of stone, in particular to an overload protection device for stone cracking equipment. The problem that existing stone cracking equipment cannot detect the stone cracking degree in time and then cannot control the stone cracking pressure in time is solved. The overload protection device comprises an overload sensor and a controller. The overload sensor is used for detecting the stone cracking degree in the stone cracking process, the controller is communicated with the overload sensor, and the controller gives out a command to lower the pressure of liquid conveyed to an expansion device of the stone cracking equipment once receiving a stone cracking signal from the overload sensor. By means of the structure, the overload protection device can control a hydraulic source or a pressure release valve in time to lower the pressure of liquid conveyed to the expansion pipe, the risk that the pipe is burst due to the fact that the expansion pipe bears too high pressure or squeezed into a stone crack is avoided, and meanwhile stone can be gradually cracked in a moderate mode.
Description
Technical field
The present invention relates to exploitation of stone, a kind of overload protection arrangement for splitting stone equipment is specifically provided.
Background technology
Existing hydraulic pressure splits stone equipment and comprises multiple expansion gear, expansion tube-i.e. elastic rubber tube that each expansion gear comprises two involutory expansion housings generally and is arranged in expansion housing.In operation, manually or electric hydraulic pump fluid under pressure is transported in this elastic rubber tube, the pressure durations of the fluid under pressure in elastic rubber tube increases, elastic rubber tube therefore prolonged expansion extrude two expansion housings, thus applies directive force to building stones and therefore make it ftracture.
Whether the existing stone equipment that splits relies on operating personnel naked-eye observation building stones and ftractures, and accordingly hydraulic control source provide split stone pressure.But, naked-eye observation has sizable hysteresis quality, information cannot be captured in the very first time of building stones cracking, this causes when building stones ftracture, hydraulic pump also continues conveying high-pressure liquid in expansion tube, make expansion tube bear the high pressure of unnecessary and lasting rising, cause shorten the application life of expansion tube, even cause expansion tube to be squeezed in the crack of building stones in certain extreme cases and therefore booster.
For above-mentioned technical problem, some prior art employing pressure gauge detects the pressure in expansion tube, and when the pressure in expansion tube is undergone mutation, presumption building stones have ftractureed and the hydraulic pressure in hydraulic control source exports accordingly.But when building stones ftracture at first, the size in crack is very little, the pressure jump of corresponding expansion tube change in size and inside thereof is also very little, almost cannot detect.By the time detect in expansion tube when there is pressure jump, the crack of building stones is very large, and now expansion tube has been subjected to damage to a certain degree.Therefore, above-mentioned prior art also cannot detect the cracking of building stones in time, and adopts pressure gauge also can obviously increase the cost splitting stone equipment.Correspondingly, this area needs a kind of device of low cost effectively to address this is that.
Summary of the invention
The present invention is intended to solve the existing stone equipment that splits can not detect the problem that therefore building stones cracking degree cannot control to split stone pressure in time in time.For this purpose, the invention provides a kind of overload protection arrangement for splitting stone equipment.This splits the hydraulic tube that stone equipment comprises hydraulic power source, at least one expansion gear, described overload protection arrangement and is connected with described expansion gear by described hydraulic power source; Each described expansion gear comprises: the first expansion housing; Second expansion housing, in assembled state described first expansion housing and described second expansion housing opposite each other and form cavity between which; And expansion tube, it to be arranged in described cavity and to be connected to described hydraulic tube.Described overload protection arrangement comprises overload sensing device and controller; described overload sensing device is used for splitting in stone operating process the degree detecting building stones cracking; described controller is communicated with described overload sensing device; receive the signal showing that building stones ftracture from described overload sensing device once described controller, described controller reduces the pressure of the fluid under pressure flowing to described expansion gear by giving an order.
In the preferred embodiment of above-mentioned overload protection arrangement; described overload sensing device comprises the strain transducer be connected between described first expansion housing and described second expansion housing, and described strain transducer is used for splitting in stone operating process the degree detecting building stones cracking.
In the preferred embodiment of above-mentioned overload protection arrangement; described overload sensing device also comprises elastic component; described elastic component is connected to the top of described first expansion housing and described second expansion housing, and described strain transducer to be attached on described elastic component and can to stretch together with described elastic component.
In the preferred embodiment of above-mentioned overload protection arrangement, described elastic component is elastic webbing, and described elastic webbing comprises elastomeric belt body and is connected to the first end ring and second end ring at described elastomeric belt body two ends; And the top of described first expansion housing and described second expansion housing is respectively arranged with the first projection and the second projection, in assembled state, described first end ring set on described first projection and described second end ring be enclosed within described second projection, thus described elastic webbing is connected to the top of described first expansion housing and described second expansion housing.
In the preferred embodiment of above-mentioned overload protection arrangement, described elastic component is spring, and described spring comprises spring body and is connected to the 3rd end ring at two ends and the 4th end ring of described spring body; And the top of described first expansion housing and described second expansion housing is respectively arranged with the first projection and the second projection, in assembled state, described 3rd end ring is enclosed within described first projection and described 4th end ring is enclosed within described second projection, thus described spring is connected to the top of described first expansion housing and described second expansion housing.
In the preferred embodiment of above-mentioned overload protection arrangement; described overload protection arrangement also comprises relief valve; receive the signal showing that building stones ftracture from described overload sensing device once described controller, relief valve described in described control order is opened to reduce the pressure of the fluid under pressure flowing to described expansion gear.
In the preferred embodiment of above-mentioned overload protection arrangement, described overload sensing device and described controller in a wired fashion or wireless communication mode be connected.
In the preferred embodiment of above-mentioned overload protection arrangement; described hydraulic power source is electric hydraulic pump; receive the signal showing that building stones ftracture from described overload sensing device once described controller, hydraulic pump described in described control order shuts down to reduce the pressure of the fluid under pressure flowing to described expansion gear.
In the preferred embodiment of above-mentioned overload protection arrangement; the described stone equipment that splits also comprises and is connected to energy distributor between described hydraulic power source and described expansion gear by described hydraulic tube, and described energy distributor is for regulating flow from the liquid of described hydraulic power source or pressure.
In the preferred embodiment of above-mentioned overload protection arrangement; described relief valve to be arranged on described energy distributor and to be connected to described hydraulic power source; when described controller from described overload sensing device receive show signal that building stones ftracture time, relief valve described in described control order is opened the fluid under pressure in described expansion gear is back in described hydraulic power source.
Present inventor finds, even if when naked eyes cannot be observed, building stones cracking also can the most directly the very first time be reflected in expansion gear two expansion housings between distance change on.Consider this point, the present invention is provided with strain transducer at the top of two of expansion gear expansion housings innovatively, in the moment that building stones have just ftractureed, described strain transducer just can detect that (now naked eyes also cannot observe obvious crack in strain sudden change the very first time, pressure gauge also cannot detect pressure jump), correspondingly, controller hydraulic control source or relief valve can reduce the hydraulic coupling flowing to expansion tube in time, which avoid expansion tube to bear too high pressure or be squeezed into building stones crack and the risk of therefore booster, building stones can also be made progressively to ftracture in the mode of gentleness simultaneously.
Accompanying drawing explanation
Fig. 1 is according to the schematic diagram splitting stone equipment of the present invention.
Fig. 2 is the cutaway view Amplified image of the expansion gear for splitting stone equipment.
Fig. 3 is the top view according to overload protection arrangement of the present invention.
Fig. 4 is the lateral view of the expansion gear for splitting stone equipment, there is shown with overload protection arrangement of the present invention with the use of two projections.
Fig. 5 overlooks enlarged drawing according to overload sensing device of the present invention.
Fig. 6 is the strain facies that detects according to the strain transducer of the overload sensing device of the present invention mapping graph for the time.
Detailed description of the invention
Fig. 1 is according to the schematic diagram splitting stone equipment of the present invention.As shown in Figure 1, this splits stone equipment and comprises hydraulic power source 1, hydraulic tube 2 and at least one expansion gear 5, and hydraulic tube 2 is connected between hydraulic power source 1 and expansion gear 5.It should be noted that, be broken away along its pre-manufactured hole 6 for building stones shown in the expansion gear 5, Fig. 1 that is arranged in building stones to be cracked to clearly illustrate, and for the ease of indicating Reference numeral, do not draw the hatching line of building stones, and expansion gear 5 is not correspondingly cut along this hatching line open.As shown in Figure 1, when carrying out splitting stone operation, first at least one hole 6 prefabricated on building stones, the quantity in hole 6 is equal with the quantity of expansion gear 5, correspondingly arranges an expansion gear 5 in each hole.The size and shape of pre-manufactured hole 6 is arranged to similar to expansion gear 5 and after expansion gear 5 expands a little, just can be extruded the wall of pre-manufactured hole 6.Hydraulic power source 1 is for providing fluid under pressure for expansion gear 5.Preferably, hydraulic power source 1 is hydraulic oil container, or is connected to hydraulic hand-pump or the electric hydraulic pump of hydraulic oil container, and hydraulic tube 2 is high-pressure oil pipes.Hydraulic power source shown in Fig. 1 is hydraulic hand-pump and comprises manual lever 11, blowback hydraulic fluid port 12, pumps hydraulic fluid port 13 and pump body 14.Split stone equipment and preferably also comprise energy distributor 3 for regulating flow from the liquid of hydraulic power source 1 or pressure, described energy distributor 3 is connected between hydraulic power source 1 and expansion gear 5 by hydraulic tube 2.In the preferred embodiment illustrated in fig. 1, energy distributor 3 comprises distributor body 31, flows into valve 32, first outflow valve 33, second outflow valve 34, the 3rd outflow valve 35 and the 4th outflow valve 36.Be provided with pressure accumulation chamber (shown in figure) in distributor body 31, described pressure accumulation chamber is used for splitting in stone operating process the fluid pressure accumulated from hydraulic power source 1.When being provided with energy distributor 3, pump body 14 to be connected to the inflow valve 32 of energy distributor 3 via the upstream hydraulic tube 21 of hydraulic tube 2 by pumping hydraulic fluid port 13.Inflow valve 32 is arranged on distributor body 31 and with the pressure accumulation chamber of distributor body 31 and is communicated with, first flows out valve 33, second flows out valve 34, 3rd flows out valve 35 and the 4th flows out valve 36 and to be arranged on distributor body 31 and to be all communicated with pressure accumulation chamber, valve 33 is flowed out respectively by first in pressure accumulation chamber, second flows out valve 34, 3rd flows out valve 35 and the 4th flows out valve 36 correspondingly via hydraulic pressure arm-the first downstream, 4 downstreams hydraulic tube 22 of hydraulic tube 2, second downstream hydraulic tube 23, 3rd downstream hydraulic tube 24 and the 4th downstream hydraulic tube 25 are connected to the expansion gear of 4 shown in Fig. 15.When operating, fluid under pressure passes through to flow into the pressure accumulation chamber that valve 32 enters distributor body 31 from pumping the upstream hydraulic tube 21 of hydraulic fluid port 13 via hydraulic tube 2, along with the inflow of fluid under pressure, fluid under pressure is full of and the pressure of fluid under pressure raises further in pressure accumulation chamber, pressure accumulation chamber by further boosting after fluid under pressure be assigned to the first inflow valve 32, second flows into valve 34, 3rd flows into valve 35 and the 4th flows into valve 36, these four inflow valves are all the adjustable choke valve of aperture and can regulate flow and the pressure of the fluid under pressure flowing into this particular expansion device as required.Fluid under pressure enters corresponding expansion gear 5 respectively by these choke valves via the first downstream hydraulic tube 22, second downstream hydraulic tube 23 of hydraulic tube 2, the 3rd downstream hydraulic tube 24 and the 4th downstream hydraulic tube 25.Alternatively, flowing into valve 32 can be one way valve, only allows the liquid from hydraulic power source enter pressure accumulation chamber and do not allow liquid backflow to hydraulic power source.So, pressure accumulation chamber just can play the effect of snubber, make hydraulic power source 1 when not by when the affecting of expansion gear 5 with constant flow rate conveying fluid under pressure.
Continue to consult Fig. 1, energy distributor 3 preferably also comprises relief valve 37.As will be described, relief valve 37 is for the pressure in release pressure accumulation chamber (and therefore discharging expansion gear) when the order receiving controller.Relief valve 37 to be arranged on distributor body 31 and to be communicated with pressure accumulation chamber, and relief valve 37 is connected to blowback hydraulic fluid port 12 by the phegma pressure pipe 26 of hydraulic tube 2.Blowback hydraulic fluid port 12 to be arranged on pump body 14 and to be communicated with pump body 14, thus fluid under pressure in pressure accumulation chamber can be back to pump body 14 via phegma pressure pipe 26 by blowback hydraulic fluid port 12 by relief valve 37.Alternatively, energy distributor 3 according to the present invention can be arranged so that fluid under pressure is back to hydraulic oil container by relief valve 37 via other hydraulic tubes from pressure accumulation chamber.Although the stone equipment that splits shown in Fig. 1 has 4 expansion gears 5 and 4 outflow valves, but should be understood that, the expansion gear that the present invention also can arrange other quantity except 4-such as include but not limited to 1,2,3,5 and 6 carries out splitting lapicide and does.It should be noted that the quantity of expansion gear is equal with the outflow valve quantity of energy distributor 3.When being provided with the expansion gear of other quantity and flowing out valve, the flow of fluid under pressure and the adjustment of pressure to flowing into expansion gear can be realized equally according to energy distributor of the present invention.It should be pointed out that all parts in Fig. 1 is not draw in proportion; In order to details can be shown better, the illustrated dimensions of expansion gear 5 is amplified.Therefore, the illustrated dimensions in accompanying drawing between all parts is not intended to imply the size of parts and relative size or limit.
Fig. 2 is the cutaway view Amplified image according to the expansion gear 5 for splitting stone equipment of the present invention.Expansion gear 5 comprises the first expansion housing 51, second expansion housing 55 and expansion tube 53.Splitting under the good state of stone device assembles, the first expansion housing 51 and the second expansion housing 55 opposite each other and form cavity between which, expansion tube 53 is arranged in the cavity and near the first expansion housing 51 and the second expansion housing 55.Particularly, the connection between the downstream hydraulic tube of hydraulic tube 2 and expansion gear 5 is realized by the hydraulic joint 4 being connected to expansion tube 53 of expansion gear 5.Fluid under pressure is transported to expansion tube 53 through hydraulic joint 4, thus expansion tube 53 is expanded and extrudes the first expansion housing 51 and the second expansion housing 55.First and second expansion housings 51,55 extrude building stones owing to being subject to the extruding of expansion tube 53.When the pressure of the fluid under pressure in expansion tube 53 is enough large, the extruding force of the first and second expansion housings 51,55 pairs of building stones is also enough large, thus this extruding force makes building stones ftracture.
Next consult Fig. 3, this figure is the top view according to overload protection arrangement of the present invention.As shown in Figure 3, overload protection arrangement of the present invention comprises overload sensing device and controller (not shown).Described overload sensing device is used for splitting in stone operating process the degree detecting building stones cracking, described controller is communicated with described overload sensing device, receive the signal showing that building stones ftracture from described overload sensing device once described controller, described controller reduces the pressure of the fluid under pressure flowing to expansion gear 5 by giving an order.Specifically, overload sensing device of the present invention comprises the elastic component 7 (such as elastic webbing) that is connected to the first expansion housing 51 and the top of the second expansion housing 55 and to attach-be such as bonded on elastic component 7 and the strain transducer 8 that can stretch together with elastic component 7.More specifically, as shown in Figure 5, elastic component 7 comprises body 73 and is connected to first end ring 71 and second end ring 72 at described body 73 two ends.Strain transducer 8 is pasted onto on the body 73 of elastic component 7, and can stretch together with body 73.Preferably, the body 73 of elastic component 7 and the first end ring 71 and the second end ring 72 adopt same resilient material-such as rubber to make integratedly.
Then consult Fig. 4 and continue to consult Fig. 3 and Fig. 5, the top of the first expansion housing 51 and the second expansion housing 55 is respectively arranged with the first projection 511 and the second projection 551.In assembled state, the first end ring 71 is enclosed within the first projection 511 and the second end ring 72 is enclosed within the second projection 551, thus described elastic component 71 is integrally connected to the top of the first expansion housing 51 and the second expansion housing 55.
In the alternative, described elastic component 7 can be spring.Similarly, described spring also comprises spring body and is connected to the 3rd end ring at two ends and the 4th end ring of described spring body.In assembled state, described 3rd end ring is enclosed within the first projection 511, and the 4th end ring is enclosed within the second projection 551, thus described spring is connected to the top of the first expansion housing 51 and the second expansion housing 55.
In broad terms, overload protection arrangement of the present invention also comprises relief valve 37 mentioned above.In operation, the signal showing that building stones ftracture is received once described controller from strain transducer 8, described controller is opened to allow the fluid under pressure in expansion gear 5 be back in described hydraulic power source-such as hydraulic pump or fuel tank with regard to order relief valve 37, thus the pressure reduced in expansion gear 5, prevent expansion tube 53 to be damaged because of the further cracking of building stones.As alternative embodiment, when described hydraulic power source 1 is electric hydraulic pump, it also can as the executing agency of overload protection.Receive the signal showing that building stones ftracture once described controller from strain transducer 8, described controller just orders described hydraulic pump to shut down to reduce the pressure of the fluid under pressure flowing to expansion gear 5.
In addition, controller as herein described can be any type of Combinational Logic Control device or microprogram control unit, if its can from strain transducer 8 Received signal strength, to judge strain mutation content according to described signal and order straining to send to executing agency's (such as relief valve 37) when sudden change reaches certain threshold value.Moreover, strain transducer 8 and controller can in a wired fashion or wireless communication mode be connected, these are all that those skilled in the art can adjust as required.
Finally consult Fig. 6, this figure is the mapping graph of the strain facies that detects of strain transducer 8 according to the present invention for the time.The longitudinal axis of this mapping graph is the value of strain stress, and transverse axis is time ms (millisecond).As shown in Figure 6, from 0 to t1 the first period, the strain capacity that strain transducer 8 detects increases gradually with constant ratio, this period is corresponding to splitting during stone operation just started between moment of just having ftractureed to building stones, during this period, hydraulic power source 1 is given in expansion tube 53 rallentando and is carried fluid under pressure, and correspondingly, the first expansion housing 51 and the second expansion housing 55 also squeeze building stones gradually along direction away from each other.Because building stones itself are fragility, so, when pressure is applied to a certain degree, building stones ftracture at t1 point place, distance between the two blocks of building stones now ftractureed can become suddenly large, and correspondingly, the distance born against between the first expansion housing 51 of building stones and the second expansion housing 55 also can become suddenly large, this causes the length of the elastic component 7 being enclosed within housing 51 and 55 top to undergo mutation, and finally causes the output valve of the strain transducer 8 be pasted onto on elastic component 7 to undergo mutation.Period in Fig. 6 between t1 to t2 just suddenlys change corresponding to the output valve of strain transducer 8.Can be clear that from Fig. 6, in the second period between t1 to t2, the output valve of strain transducer 8 is to increase considerably far above the slope of the first period.Now, control order relief valve 37 or hydraulic pump 1 perform corresponding operation, to reduce the liquid flowing to expansion tube 53, thus building stones are progressively ftractureed in mode that is milder, milder.This corresponds to the 3rd period in Fig. 6 between t2 to t3.Within this period, the output valve of strain transducer 8 is advanced the speed not only lower than the second period, is preferably lower than the very first time simultaneously, because now building stones have split gap, further cracking does not need larger pressure.Finally, after building stones instant of complete cracking, expansion tube 53 pressure release given by control order relief valve 37 or hydraulic pump 1, thus makes the output valve of strain transducer 8 drop to 0 from peak within the 4th period from t3 to t4, therefore completes a secondary fissure stone operation.
Can be found out by description above, strain transducer 8 of the present invention can adopt any suitable form, as long as can detect that the distance between the first expansion housing 51 and the second expansion housing 55 is suddenlyd change in the moment of building stones cracking.In preferred embodiment shown in the drawings, strain transducer 8 is pasted onto the foil gauge on the body 73 of elastic component 7.
Those skilled in the art it is easily understood that, be different from of the prior art visually observing or pressure detecting, the present invention is provided with strain transducer at the top of two of expansion gear expansion housings innovatively, just can detect that (now naked eyes also cannot observe obvious crack in strain sudden change the very first time in the moment that building stones have just ftractureed, pressure gauge also cannot detect pressure jump), controller is therefore, it is possible to hydraulic control source or relief valve reduce the hydraulic coupling flowing to expansion tube in time, thus avoid expansion tube and bear too high pressure or be squeezed into building stones crack and the risk of therefore booster, building stones can also be made progressively to ftracture in the mode of gentleness simultaneously.
So far, shown by reference to the accompanying drawings preferred embodiment describes technical scheme of the present invention, but those skilled in the art are it is easily understood that protection scope of the present invention is obviously not limited to these detailed description of the invention.Under the prerequisite not departing from principle of the present invention, those skilled in the art can make equivalent change or replacement to correlation technique feature, and these changes or the technical scheme after replacing it all will fall within protection scope of the present invention.
Claims (10)
1., for splitting an overload protection arrangement for stone equipment, this splits the hydraulic tube that stone equipment comprises hydraulic power source, at least one expansion gear, described overload protection arrangement and is connected with described expansion gear by described hydraulic power source,
Each described expansion gear comprises: the first expansion housing; Second expansion housing, in assembled state described first expansion housing and described second expansion housing opposite each other and form cavity between which; And expansion tube, it to be arranged in described cavity and to be connected to described hydraulic tube,
It is characterized in that; described overload protection arrangement comprises overload sensing device and controller; described overload sensing device is used for splitting in stone operating process the degree detecting building stones cracking; described controller is communicated with described overload sensing device; receive the signal showing that building stones ftracture from described overload sensing device once described controller, described controller reduces the pressure of the fluid under pressure flowing to described expansion gear by giving an order.
2. overload protection arrangement according to claim 1; it is characterized in that; described overload sensing device comprises the strain transducer be connected between described first expansion housing and described second expansion housing, and described strain transducer is used for splitting in stone operating process the degree detecting building stones cracking.
3. overload protection arrangement according to claim 2; it is characterized in that; described overload sensing device also comprises elastic component; described elastic component is connected to the top of described first expansion housing and described second expansion housing, and described strain transducer to be attached on described elastic component and can to stretch together with described elastic component.
4. overload protection arrangement according to claim 3, is characterized in that, described elastic component is elastic webbing, and described elastic webbing comprises elastomeric belt body and is connected to the first end ring and second end ring at described elastomeric belt body two ends; And
The top of described first expansion housing and described second expansion housing is respectively arranged with the first projection and the second projection, in assembled state, described first end ring set on described first projection and described second end ring be enclosed within described second projection, thus described elastic webbing is connected to the top of described first expansion housing and described second expansion housing.
5. overload protection arrangement according to claim 3, is characterized in that, described elastic component is spring, and described spring comprises spring body and is connected to the 3rd end ring at two ends and the 4th end ring of described spring body; And
The top of described first expansion housing and described second expansion housing is respectively arranged with the first projection and the second projection, in assembled state, described 3rd end ring is enclosed within described first projection and described 4th end ring is enclosed within described second projection, thus described spring is connected to the top of described first expansion housing and described second expansion housing.
6. overload protection arrangement according to any one of claim 1 to 5; it is characterized in that; described overload protection arrangement also comprises relief valve; receive the signal showing that building stones ftracture from described overload sensing device once described controller, relief valve described in described control order is opened to reduce the pressure of the fluid under pressure flowing to described expansion gear.
7. overload protection arrangement according to any one of claim 1 to 5, is characterized in that, described overload sensing device and described controller in a wired fashion or wireless communication mode be connected.
8. overload protection arrangement according to claim 6; it is characterized in that; described hydraulic power source is electric hydraulic pump; receive the signal showing that building stones ftracture from described overload sensing device once described controller, hydraulic pump described in described control order shuts down to reduce the pressure of the fluid under pressure flowing to described expansion gear.
9. overload protection arrangement according to claim 8; it is characterized in that; the described stone equipment that splits also comprises and is connected to energy distributor between described hydraulic power source and described expansion gear by described hydraulic tube, and described energy distributor is for regulating flow from the liquid of described hydraulic power source or pressure.
10. overload protection arrangement according to claim 9; it is characterized in that; described relief valve to be arranged on described energy distributor and to be connected to described hydraulic power source; when described controller from described overload sensing device receive show signal that building stones ftracture time, relief valve described in described control order is opened the fluid under pressure in described expansion gear is back in described hydraulic power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510391234.8A CN104948188B (en) | 2015-07-06 | 2015-07-06 | Overload protection device for stone cracking equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510391234.8A CN104948188B (en) | 2015-07-06 | 2015-07-06 | Overload protection device for stone cracking equipment |
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| CN104948188A true CN104948188A (en) | 2015-09-30 |
| CN104948188B CN104948188B (en) | 2017-03-22 |
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| CN201510391234.8A Active CN104948188B (en) | 2015-07-06 | 2015-07-06 | Overload protection device for stone cracking equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105864129A (en) * | 2016-05-26 | 2016-08-17 | 广东南曦液压机械有限公司 | Full-automatic stone cracking machine |
| CN108426828A (en) * | 2017-02-13 | 2018-08-21 | 埃梯梯精密机械制造（无锡）有限公司 | A kind of brake block test device and its test method |
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| GB1324310A (en) * | 1971-06-14 | 1973-07-25 | Darda H | Stone or rock splitting tools |
| CN86202119U (en) * | 1986-04-04 | 1987-02-04 | 王长伦 | Hydraulic elastic expansion fragmenting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864129A (en) * | 2016-05-26 | 2016-08-17 | 广东南曦液压机械有限公司 | Full-automatic stone cracking machine |
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| CN108426828A (en) * | 2017-02-13 | 2018-08-21 | 埃梯梯精密机械制造（无锡）有限公司 | A kind of brake block test device and its test method |
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| Publication number | Publication date |
|---|---|
| CN104948188B (en) | 2017-03-22 |
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