Back washing filtering device and working face hydraulic system
A technology of backwash filtration and filter, which is applied in the direction of fluid pressure actuation system components, fluid pressure actuation devices, mechanical equipment, etc. It can solve the problems of unguaranteed cleanliness, filtration, and secondary pollution of emulsion, and achieve structural Simple, less components, less vibration and noise
Active Publication Date: 2013-04-17
SANY HEAVY EQUIP
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[0005] However, when the backwash filter device has only one filter, the emulsion used for backwash cannot be filtered through the filter first, and the cleanliness cannot be guaranteed, which will easily cause secondary pollution of the filter element and the emulsion on the working surface
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[0035] It should be pointed out that the description and sequence of specific structures in this section are only descriptions of specific embodiments, and should not be considered as limiting the protection scope of the present invention. In addition, the embodiments in this section and the features in the embodiments can be combined with each other under the condition of no conflict.
[0036] Please refer to figure 1 , the present invention will be described in detail below in conjunction with embodiment.
[0037] As shown in the figure, the backwash filter device of this embodiment includes a reversing valve 6 , a filter 3 and an accumulator 8 .
[0038] Wherein, the liquid inlet of the filter 3 is selectively connected to the liquid inlet channel 01 or the liquid discharge channel 02 through the reversing valve 6, that is, the reversing valve 6 has at least two working positions. In the first working position, the filter 3 The liquid inlet of the filter 3 communicates wi...
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The invention discloses a back washing filtering device and a working face hydraulic system. The back washing filtering device comprises a change valve, a filter and an energy accumulator; the liquid inlet of the filter is selectively connected with a liquid inlet channel or a liquid drainage channel through the change valve, and the liquid outlet of the filter is connected with a liquid outlet channel; and the energy accumulator is connected with the liquid outlet channel. According to the embodiment of the invention, back washing of a single filter can be realized, and back washing liquid stored in the energy accumulator has already been filtered by the filter, so that the cleanliness of the back washing liquid is ensured without causing secondary pollution of the filter element of the filter; moreover, proper accumulators or a proper amount of energy accumulators are selected so that the flow rate of back washing can satisfy the use requirement; moreover, the energy accumulator is arranged on the liquid outlet channel, so that the pressure impact can be efficiently absorbed and the vibration and noise are reduced; moreover, elements required by the back washing filtering device are small in amount, simple in structure and relatively low in cost.
Description
technical field [0001] The invention relates to the technical field of backwashing and filtration, in particular to a backwashing and filtering device and a working face hydraulic system. Background technique [0002] In the underground environment of coal mines, emulsion pumps are generally used to provide emulsion for hydraulic equipment such as hydraulic supports. Excessive harmful impurities in the emulsion will seriously affect the normal operation of the hydraulic system, for example, the small gaps between the relative moving parts in the hydraulic components and the throttle holes and gaps will be stuck or blocked. [0003] Therefore, before the emulsion enters the hydraulic system, it needs to be filtered through the filter. However, after a long time of use, the impurities on the filter element will accumulate more and more, resulting in a decrease in the filter performance of the filter. Unable to meet the filtration needs of emulsion. [0004] The existing back...
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IPC IPC(8): F15B21/04F15B21/08
Inventor 于洋高明常镝
Owner SANY HEAVY EQUIP