CN203594462U - Limit device for preventing pulling of bracket rear columns - Google Patents
Limit device for preventing pulling of bracket rear columns Download PDFInfo
- Publication number
- CN203594462U CN203594462U CN201320725993.XU CN201320725993U CN203594462U CN 203594462 U CN203594462 U CN 203594462U CN 201320725993 U CN201320725993 U CN 201320725993U CN 203594462 U CN203594462 U CN 203594462U
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- CN
- China
- Prior art keywords
- base
- limited block
- main muscle
- support
- rear pillar
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a limit device for preventing pulling of bracket rear columns. The limit device comprises a base, a top beam and a shielding beam, wherein four vertical columns support arranged between the top beam and the base to support the top beam and the base, the shielding beam and the base are connected through a front connection rod and a rear connection rod, and limit blocks are arranged at least at one position between the front connection rod and a main reinforcement bar of the base, between the front connection rod and a main reinforcement bar of the shielding beam, between the rear connection rod and the main reinforcement bar of the base and between the rear connection rod and the main reinforcement bar of the shielding beam. Rising height of a bracket is limited by means of the mode of the bracket rising limit blocks, and damage to the bracket vertical columns and connection parts of the bracket vertical columns is avoided completely.
Description
Technical field
The utility model relates to a kind of coal-mine hydraulic support, relates in particular to the anti-rear pillar stopping means that pulls out of a kind of support.
Background technology
As shown in Figure 1, in process of coal mining, there is pulling out rear pillar phenomenon in four column holders sometimes, such as: standing shield hydraulic support is greater than 90 while spending when roof caving angle; Or four post caving roof coal hydraulic supports when top coal soft, broken, or roof coal caving angle is greater than 90 degree, or when other special circumstances, all easily pulls out rear pillar phenomenon.
Column is single effect jack, has large thrust and small pulling force, and when support pulls out rear pillar, column very easily damages, and even causes danger.
Available technology adopting anti-pulled out rear pillar measure; except optimizing supporting structure and improving coal winning technology; take to adopt in column junction the mode of stress bearing pin more; this mode can play the effect that protection column is not damaged in the time pulling out rear pillar; but still exist bearing pin to fall, danger that column is toppled over, and need to repair, affect the drawback of production efficiency.
Utility model content
The purpose of this utility model is to provide the anti-rear pillar stopping means that pulls out of a kind of simple in structure, safe and reliable support.
The purpose of this utility model is achieved through the following technical solutions:
The anti-rear pillar stopping means that pulls out of support of the present utility model, comprise base, back timber and caving shield, between described back timber and base by four root posts support, between described caving shield and base, be connected by front rod and back link, below at least one position be provided with limited block:
Between the main muscle of described front rod and described base, between described front rod and the main muscle of described caving shield, between described back link and the main muscle of described base, between described back link and the main muscle of described caving shield.
The technical scheme being provided by above-mentioned the utility model can be found out, the anti-rear pillar stopping means that pulls out of support that the utility model embodiment provides, owing to being provided with limited block between front and rear connecting rods and the main muscle of base or caving shield, adopt the mode limit bracket lifting height that rises frame limited block, guaranteed that bracket upright post and connector thereof are not damaged completely.
Accompanying drawing explanation
Fig. 1 is the structural representation of four post hydraulic supports in prior art;
Fig. 2 is the structural representation of base in the utility model embodiment;
Fig. 3 a is the end face structure schematic diagram of limited block in the utility model embodiment;
Fig. 3 b is the side structure schematic diagram of monaural limited block in the utility model embodiment;
Fig. 3 a is the side structure schematic diagram of ears limited block in the utility model embodiment;
Fig. 4 is the state structure schematic diagram in limited block application in the utility model embodiment.
In figure: 1, back timber, 2, column, 3, front rod, 4, caving shield, 5, back link, 6, base, 7, limited block embedding groove, 8, limited block connecting hole, 9, limited block, 10, engaging lug.
The specific embodiment
To be described in further detail the utility model embodiment below.
The anti-rear pillar stopping means that pulls out of support of the present utility model, its preferably the specific embodiment be:
Comprise base, back timber and caving shield, between described back timber and base by four root posts support, between described caving shield and base, be connected by front rod and back link, below at least one position be provided with limited block:
Between the main muscle of described front rod and described base, between described front rod and the main muscle of described caving shield, between described back link and the main muscle of described base, between described back link and the main muscle of described caving shield.
On described front rod or on the main muscle of base or on back link or the main muscle of caving shield be provided with limited block embedding groove, described limited block embeds in described limited block embedding groove.
The both sides of described limited block embedding groove are provided with limited block connecting hole, and described limited block comprises spacing steel plate, and the both sides of described spacing steel plate are respectively equipped with engaging lug, and described engaging lug is fixed on described limited block connecting hole.
The both sides of described spacing steel plate are respectively equipped with one or two engaging lug.
The anti-rear pillar stopping means that pulls out of support of the present utility model, adopts the mode that rises frame limited block, and limit bracket lifting height, has guaranteed that bracket upright post and connector thereof are not damaged completely.
Principle of the present utility model is:
As shown in Figures 2 to 4, the swing position of four connecting rods determines the height of support, the height of the Position Control support by limiting rod, the unlikely limit that exceedes column.
In concrete enforcement, the position of connecting rod can limit support height by simulation and calculative determination time; According to the position of connecting rod, determine the inlaying of the main muscle upper limit position block of base, permanent position.
Limited block structure: limited block adopts steel plate blanking or welding fabrication, adopts monaural or ears or other structures.
According to producing or technique needs, can adopt one or more limit controlled positions, can adopt the form of controlling front rod or back link, limited block can be arranged on base or connecting rod or caving shield, and limited block can employing activity or fixing form etc.
The above; it is only the preferably specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (4)
1. the anti-rear pillar stopping means that pulls out of support, comprise base, back timber and caving shield, between described back timber and base, support by four root posts, between described caving shield and base, be connected by front rod and back link, it is characterized in that, below at least one position be provided with limited block:
Between the main muscle of described front rod and described base, between described front rod and the main muscle of described caving shield, between described back link and the main muscle of described base, between described back link and the main muscle of described caving shield.
2. support according to claim 1 is anti-pulls out rear pillar stopping means, it is characterized in that, on described front rod or on the main muscle of base or on back link or the main muscle of caving shield be provided with limited block embedding groove, described limited block embeds in described limited block embedding groove.
3. the anti-rear pillar stopping means that pulls out of support according to claim 2, it is characterized in that, the both sides of described limited block embedding groove are provided with limited block connecting hole, described limited block comprises spacing steel plate, the both sides of described spacing steel plate are respectively equipped with engaging lug, and described engaging lug is fixed on described limited block connecting hole.
4. support according to claim 2 is anti-pulls out rear pillar stopping means, it is characterized in that, the both sides of described spacing steel plate are respectively equipped with one or two engaging lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725993.XU CN203594462U (en) | 2013-11-15 | 2013-11-15 | Limit device for preventing pulling of bracket rear columns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725993.XU CN203594462U (en) | 2013-11-15 | 2013-11-15 | Limit device for preventing pulling of bracket rear columns |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203594462U true CN203594462U (en) | 2014-05-14 |
Family
ID=50675357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320725993.XU Expired - Fee Related CN203594462U (en) | 2013-11-15 | 2013-11-15 | Limit device for preventing pulling of bracket rear columns |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203594462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557021A (en) * | 2013-11-15 | 2014-02-05 | 中煤北京煤矿机械有限责任公司 | Back-column-pulling-preventing limit device of support |
-
2013
- 2013-11-15 CN CN201320725993.XU patent/CN203594462U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557021A (en) * | 2013-11-15 | 2014-02-05 | 中煤北京煤矿机械有限责任公司 | Back-column-pulling-preventing limit device of support |
| CN103557021B (en) * | 2013-11-15 | 2016-04-20 | 中煤北京煤矿机械有限责任公司 | Support is anti-pulls out rear pillar stopping means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20161115 |