CN202325560U - Mining hydraulic support frame upright post with anti-pressure device - Google Patents
Mining hydraulic support frame upright post with anti-pressure device Download PDFInfo
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- CN202325560U CN202325560U CN201120354079XU CN201120354079U CN202325560U CN 202325560 U CN202325560 U CN 202325560U CN 201120354079X U CN201120354079X U CN 201120354079XU CN 201120354079 U CN201120354079 U CN 201120354079U CN 202325560 U CN202325560 U CN 202325560U
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- hydraulic support
- safety valve
- cylinder body
- sealing ring
- unloading
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Abstract
The utility model discloses a mining hydraulic support frame upright post with an anti-pressure device, which comprises a cylinder body and a movable post; an upper sealing ring and a lower sealing ring are arranged between the inner wall of the cylinder body and the outer wall of the movable column; a lower safety valve is arranged on a liquid inlet and return pipeline of a lower cavity of the cylinder body; meanwhile, a discharge small hole group is arranged in the side wall of the cylinder body and connected with an upper safety valve; when the movable post is reduced to a stroke lowest point, the discharge small hole group is positioned in a position between the upper sealing ring and the lower sealing ring; and the discharge pressure of the lower safety valve is higher than that of the upper safety valve. When the mine ground pressure is displayed to be severe and exceeds the working resistance of a hydraulic support frame, the upper safety valve is discharged, and the lower safety valve still functions, so that the hydraulic support frame can be prevented from breaking down under pressure, the safety and the normal operation of a fully-mechanized mining face are ensured, and the economic loss is reduced.
Description
Technical field
The utility model relates to the column of a kind of colliery integrated hydraulic support, relates in particular to a kind of anti-mine hydraulic support column that kills device that has.
Background technology
At present, along with the develop rapidly of comprehensive mechanical coal mining technology, hydraulic support has been brought into play important role at safety, highly efficient and productive fully-mechanized mining working.
As shown in Figure 1, hydraulic support of the prior art mainly is made up of front-axle beam 01, back timber 02, caving shield 03, quadric chain 04, base 05, hydraulic prop 06 and hydraulic pressure component etc.Sublevel caving hydrau lic support also has tail boom and puts coal mechanism.
Hydraulic support is the key equipment of colliery comprehensive mechanical coal mining work plane, and it is supported between roof and the base plate, for coal work has been created safe and reliable operating space.Open and the closure of hydraulic support is that elongation, the shortening of leaning on column realize that when hydraulic support column extended, the height of hydraulic support raise, and the stretching top board is not allowed it to collapse and fallen, and hydraulic support also receives the immense pressure of balkstone simultaneously.
As shown in Figure 2, hydraulic support column of the prior art mainly comprises: cylinder body 1, work post 2, last sealing ring 3, lower seal 4, column cavity of resorption advance hole for back flow 6, hydraulically-controlled one-way valve 8, following safety valve 9, control valve 10 etc.Through handling control valve 10, column can total travel rises or falls.
Under the situation of roof pressure less than the hydraulic support yield load, hydraulic support can operate as normal.At a comprehensive mining machinery coal-face more than 100 hydraulic support is installed; The roof pressure that bears when the part hydraulic support is during just over the hydraulic support yield load; The following safety valve 9 of hydraulic vertical prop cavity of resorption is opened, and discharges small amount of liquid, the load redistribution that hydraulic support bears; At this moment, hydraulic support still can continue operate as normal.
There is following shortcoming at least in above-mentioned prior art:
Mine pressure is unpredictable fixed sometimes, and when roof pressure during considerably beyond the yield load of hydraulic support, the safety valve of the column in the hydraulic support will be opened on a large scale, and the liquid of column cavity of resorption will discharge in a large number, contraction in length.Hydraulic support is closed gradually, and until hydraulic support is killed, promptly the hydraulic stroke of hydraulic support column is all used up, and hydraulic support becomes rigid objects, is pressed between roof rock and the base plate inflexibly, can't rise, can't move.To bring tremendous loss this moment to the comprehensive mechanical coal mining work plane.
The utility model content
The purpose of the utility model provides a kind of when top board surpasses the hydraulic support working resistance, can prevent to have an anti-mine hydraulic support column that kills device with what hydraulic support killed.
The purpose of the utility model realizes through following technical scheme:
The utility model have an anti-mine hydraulic support column that kills device; Comprise cylinder body, post alive; Be provided with sealing ring and lower seal between the outer wall of the inwall of said cylinder body and the post of living; The liquid back pipe road of advancing of said cylinder body cavity of resorption is provided with down safety valve, and the sidewall of said cylinder body is provided with the unloading small hole set, and said unloading small hole set is connected with safety valve;
When said post alive was reduced to the stroke minimum point, said unloading small hole set is position between sealing ring and the lower seal on said;
The said unloading pressure of safety valve down is higher than the said unloading pressure of going up safety valve.
Technical scheme by above-mentioned the utility model provides can be found out; The utility model provides has the anti-mine hydraulic support column that kills device; Because the liquid back pipe road of advancing of cylinder body cavity of resorption is provided with down safety valve; The sidewall of cylinder body is provided with the unloading small hole set simultaneously, and the unloading small hole set is connected with safety valve; When the post of living is reduced to the stroke minimum point, the position of unloading small hole set between last sealing ring and lower seal; The unloading pressure of following safety valve is higher than the unloading pressure of safety valve.When strata behaviors violent, and when surpassing the hydraulic support working resistance, last safety valve unloading, and safety valve still works down, can prevent hydraulic support is killed, and guarantees the safety and the normal operation of fully-mechanized mining working, the minimizing economic loss.
Description of drawings
Fig. 1 is the structural representation of mining hydraulic support in the prior art;
Fig. 2 is the fundamental diagram sketch map of mine hydraulic support column of the prior art;
Fig. 3 has an anti-fundamental diagram that kills the mine hydraulic support column of device for what the utility model embodiment provided;
Fig. 4 has an anti-mine hydraulic support column normal operating condition figure that kills device for what the utility model embodiment provided;
Fig. 5 has an anti-mine hydraulic support column closure state figure that kills device for what the utility model embodiment provided.
The specific embodiment
To combine accompanying drawing that the utility model embodiment is done to describe in detail further below.
The utility model have an anti-mine hydraulic support column that kills device, its preferable specific embodiment is:
Comprise cylinder body, post alive; Be provided with sealing ring and lower seal between the outer wall of the inwall of said cylinder body and the post of living, the liquid back pipe road of advancing of said cylinder body cavity of resorption is provided with down safety valve, it is characterized in that; The sidewall of said cylinder body is provided with the unloading small hole set, and said unloading small hole set is connected with safety valve;
When said post alive was reduced to the stroke minimum point, said unloading small hole set is position between sealing ring and the lower seal on said;
The said unloading pressure of safety valve down is higher than the said unloading pressure of going up safety valve.
The unloading pressure of said down safety valve is 1.3～1.5 times of the said unloading pressure of going up safety valve, also can set as required.
This mine hydraulic support column is the column that single telescopic column or single telescopic band machinery are heightened.
Use the utility model, violent when strata behaviors, and when surpassing the hydraulic support working resistance, can prevent hydraulic support is killed, guarantee the safety and the normal operation of fully-mechanized mining working, reduce economic loss.Both can guarantee that hydraulic support normally worked, and can guarantee that again hydraulic support was not crushed to death when running into special roof pressure, it is greatly convenient to bring to coal work, the tremendous economic loss that causes after having avoided support to be crushed to death.Give colliery safety, the highly efficient and productive condition of having created.
The operating principle of practical implementation is:
As shown in Figure 3, mainly comprise: cylinder body 1, the post 2 of living, go up that sealing ring 3, lower seal 4, unloading small hole set 5, column cavity of resorption advance hole for back flow 6, go up safety valve 7, hydraulically-controlled one-way valve 8, safety valve 9, control valve 10 etc. down.
Through handling control valve 10, hydraulic support is anti-to be killed device and can total travel rises or fall, and has nothing different with common hydraulic support column, is installed between hydraulic support back timber and the base, and the hydraulic vertical prop function with common is the same generally speaking.But the anti-mine hydraulic support column that kills device that has of the utility model is equipped with two opening pressure different security valves; Last safety valve 7 is normal unloading safety valve; The setting opening pressure is P1, the safety valve of following safety valve 9 for preventing to kill, and opening pressure generally is set at 1.3～1.5P1.
Like Fig. 3, shown in Figure 4, under the normal condition, lower seal 4 is above unloading small hole set 5; And away from unloading small hole set 5; When roof pressure surpassed the hydraulic support working resistance, plunger shaft pressure surpassed the opening pressure of safety valve 7 settings down, and last safety valve 7 is opened; The safety valve 7 of the liquid of plunger shaft on unloading small hole set 5 discharged, and the total cross-sectional area of unloading small hole set 5 and the flow of last safety valve 7 are complementary.
Along with the post 2 of living contracts down gradually, when the piston head lower edge of the post 2 of living when cylinder bottom also has Lmm (this value designs as the case may be), the band of lower seal 4 will be crossed and unload small hole set 5; At this moment, last safety valve 7 stops unloading, and following safety valve 9 plays a role; The supporting capacity of column improves greatly; Thereby the working resistance of hydraulic support is increased greatly, because the set pressure of following safety valve 9 is higher, the working resistance of hydraulic support will be brought up to 1.3～1.5 times of former working resistance.This high workload resistance makes the height of hydraulic support stop to descend or highly stopping the long period at this.And this moment, column still had the hydraulic stroke of Lmm, staff to have time enough to find the situation of hydraulic support, and promptly moved the handle of control valve 10 through normal operation; Make the rod end chamber feed liquor of column; Open hydraulic control one-way valve 8 simultaneously, the hydraulic support height is reduced, back timber leaves top board; And shift out danger predicament ground, thereby prevent that hydraulic support from further being killed.
As shown in Figure 5, have anti-ly when killing the mine hydraulic support column closure state of device, last sealing ring 3 and keeps certain distances apart from unloading small hole set 5 still above unloading small hole set 5, this just assurance upward the sealing of sealing ring 3 be cocksure.
The utility model has the hydraulic support that the anti-mine hydraulic support column that kills device goes for installing single flexible (contain single flexible add machinery heighten) column, or the hydraulic support of other type.
The above; Be merely the preferable specific embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claims.
Claims (3)
1. one kind has the anti-mine hydraulic support column that kills device; Comprise cylinder body, post alive; Be provided with sealing ring and lower seal between the outer wall of the inwall of said cylinder body and the post of living, the liquid back pipe road of advancing of said cylinder body cavity of resorption is provided with down safety valve, it is characterized in that; The sidewall of said cylinder body is provided with the unloading small hole set, and said unloading small hole set is connected with safety valve;
When said post alive was reduced to the stroke minimum point, said unloading small hole set is position between sealing ring and the lower seal on said;
The said unloading pressure of safety valve down is higher than the said unloading pressure of going up safety valve.
2. according to claim 1ly have an anti-mine hydraulic support column that kills device, it is characterized in that, the said unloading pressure of safety valve down is 1.3～1.5 times of the said unloading pressure of going up safety valve.
3. the mine hydraulic support column of preventing killing device that has according to claim 1 and 2 is characterized in that this mine hydraulic support column is the column that single telescopic column or single telescopic band machinery are heightened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120354079XU CN202325560U (en) | 2011-09-20 | 2011-09-20 | Mining hydraulic support frame upright post with anti-pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120354079XU CN202325560U (en) | 2011-09-20 | 2011-09-20 | Mining hydraulic support frame upright post with anti-pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202325560U true CN202325560U (en) | 2012-07-11 |
Family
ID=46437542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120354079XU Withdrawn - After Issue CN202325560U (en) | 2011-09-20 | 2011-09-20 | Mining hydraulic support frame upright post with anti-pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202325560U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330560A (en) * | 2011-09-20 | 2012-01-25 | 中煤北京煤矿机械有限责任公司 | Mine hydraulic support stand column with tight-pressing resistance device |
| CN109869170A (en) * | 2019-03-06 | 2019-06-11 | 东北大学 | A kind of mine hydraulic support column with anti-crushing device |
-
2011
- 2011-09-20 CN CN201120354079XU patent/CN202325560U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330560A (en) * | 2011-09-20 | 2012-01-25 | 中煤北京煤矿机械有限责任公司 | Mine hydraulic support stand column with tight-pressing resistance device |
| CN102330560B (en) * | 2011-09-20 | 2013-12-18 | 中煤北京煤矿机械有限责任公司 | Mine hydraulic support stand column with tight-pressing resistance device |
| CN109869170A (en) * | 2019-03-06 | 2019-06-11 | 东北大学 | A kind of mine hydraulic support column with anti-crushing device |
| CN109869170B (en) * | 2019-03-06 | 2020-08-21 | 东北大学 | Mining hydraulic support stand with prevent pressing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20131218 |
|
| RGAV | Abandon patent right to avoid regrant |