CN117780398A - Bottom valve - Google Patents
Bottom valve Download PDFInfo
- Publication number
- CN117780398A CN117780398A CN202211157986.4A CN202211157986A CN117780398A CN 117780398 A CN117780398 A CN 117780398A CN 202211157986 A CN202211157986 A CN 202211157986A CN 117780398 A CN117780398 A CN 117780398A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve seat
- piston
- inner cavity
- middle section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000003245 coal Substances 0.000 abstract description 4
- 239000000839 emulsion Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
The invention discloses a bottom valve, which is used for the bottom of a secondary cylinder of a stand column of a hydraulic support of a coal mine, and aims to mainly solve the technical problems that the existing bottom valve is small in flow, has a gap, can loosen and unbuckle for a long time, and the like. The bottom valve comprises a valve cover, a reset spring, a piston, a valve pad assembly, a valve seat and a locking plug. The valve cover is characterized in that an opposite side platform for fixing an open spanner is arranged on the outer side of the left end of the valve cover, an inner cavity is formed in the valve cover, a reset spring, a piston, a valve pad and a valve pad component are sequentially arranged in the inner cavity of the valve cover, liquid outlet holes A are uniformly formed in the middle section of the valve cover and are connected with the inner cavity of the valve cover, threads are formed between the right end of the valve cover and the left end of a valve seat, threads are formed in the middle section of the valve seat, a counter bore is formed in the middle section of the threads and used for placing a locking plug, an outer hexagonal boss is formed in the right end face of the valve seat, a through hole is formed in the center of the end face of the outer hexagonal boss and is communicated with the inner cavity of the valve seat, and liquid inlet holes P are uniformly formed in the periphery of the center hole and are communicated with the inner cavity of the valve seat.
Description
Technical Field
The invention relates to the field of coal mine hydraulic pressure, in particular to a bottom valve.
Background
The stand jacks in the mining stand hydraulic control system are single telescopic or double telescopic stand columns, the supporting working height of the hydraulic stand is dependent on the telescopic ratio of the stand jacks, and the performance, quality and safety of the bottom valve assembled in the stand jacks ensure the normal and safe working of the stand jacks. The existing bottom valve mainly has the following problems: the flow is small, the structure is complicated, the assembly is complicated, and the phenomenon that the assembly between the vertical column jack and the assembly is not firm or even falls off often exists.
Disclosure of Invention
The invention discloses a bottom valve which is used for the bottom of a secondary cylinder of a stand column of a hydraulic support of a coal mine, and aims to mainly solve the technical problems that the existing bottom valve is small in flow, has a gap, can loosen and unbuckle for a long time, and the like. The bottom valve comprises a valve cover, a return spring, a piston, a valve pad assembly, a locking plug and a valve seat. The valve cover is characterized in that an opposite side platform for fixing an open spanner is arranged on the outer side of the left end of the valve cover, an inner cavity is formed in the valve cover, a reset spring, a piston, a valve pad and a valve pad component are sequentially arranged in the inner cavity of the valve cover, liquid outlet holes A are uniformly formed in the middle section of the valve cover and are connected with the inner cavity of the valve cover, a threaded connection is formed between the right end of the valve cover and the left end of a valve seat, the inner cavity of the valve seat is formed in the valve seat, threads are formed in the middle section of the valve seat, a counter bore is formed in the middle section of the threads, a locking plug is arranged in the middle section of the threads, an outer hexagonal boss is formed in the right end face of the valve cover, a through hole is formed in the center of the end face of the outer hexagonal boss and is communicated with the inner cavity of the valve seat, the right end part of the piston is in clearance fit with the center hole, and liquid inlet P ports are uniformly formed around the center hole and are communicated with the inner cavity of the valve cover.
This bottom valve is threaded connection between valve gap right-hand member and the disk seat left end, and is provided with the opposite side platform that supplies the open spanner to fix in the valve gap left end outside, and the outer hexagonal boss has been seted up to the disk seat right-hand member, conveniently dismantle fast, and can not cause the damage to valve gap and disk seat.
The bottom valve is characterized in that the middle section of the valve seat is provided with threads, the middle section of the thread is provided with a counter bore, a locking plug is placed in the counter bore, the threads formed in the middle section of the valve seat are matched with the upright jack, the reliability of assembly is guaranteed compared with that of the plug-in type bottom valve, the locking plug is placed in the counter bore formed in the middle end of the threads, and the good assembly stability of the bottom valve under a high-flow and high-pressure working environment is further guaranteed.
The boss is arranged at the middle section of the piston, the section size of the boss is larger than the size of the central hole of the valve seat, and when the emulsion pressure of the inner cylinder of the upright jack is too high to damage the piston, the valve pad and the valve pad assembly, the piston is prevented from damaging the valve seat of the base valve and the cylinder body of the upright jack by virtue of the cooperation between the boss of the piston and the central hole of the valve seat.
Drawings
FIG. 1 is an overall cross-sectional view of the present invention;
FIG. 2 is a right side view of the present invention;
FIG. 3 is a cross-sectional view of a valve cover of the present invention;
FIG. 4 is a cross-sectional view of a piston of the present invention;
FIG. 5 is a cross-sectional view of a valve seat of the present invention;
fig. 6 is a schematic diagram of the hydraulic principle of the present invention.
Detailed Description
The invention discloses a bottom valve which is used for the bottom of a secondary cylinder of a stand column of a hydraulic support of a coal mine, and aims to mainly solve the technical problems that the existing bottom valve is small in flow, has a gap, can loosen and unbuckle for a long time, and the like. The bottom valve of the present invention comprises a valve cover 10, a return spring 11, a piston 12, a valve pad 13, a valve pad assembly 14, a valve seat 15, and a check plug 16. The valve cover 10 is provided with an opposite side platform for fixing an open spanner at the outer side at the left end, an inner cavity is formed in the valve cover 10, a reset spring 11, a piston 12, a valve pad 13 and a valve pad assembly 14 are sequentially arranged in the valve cover inner cavity 104, a liquid outlet hole A port 101 is uniformly formed in the middle section of the valve cover 10 and is connected with the valve cover inner cavity 104, a thread connection is formed between the right end of the valve cover 10 and the left end of a valve seat 15, a valve seat inner cavity 103 is formed in the valve seat 15, a thread is formed in the middle section of the valve seat 15, a counter bore is formed in the middle section of the thread and is used for placing a locking plug 16, an outer hexagonal boss is formed in the right end face of the valve seat 15, a through hole is formed in the center of the end face of the outer hexagonal boss and is communicated with the valve seat inner cavity 103, the right end part of the piston 12 is in clearance fit with the center hole, a liquid inlet hole P port 102 is uniformly formed in the periphery of the center hole and is communicated with the valve seat inner cavity 103.
The working principle of the bottom valve is as follows: when the hydraulic support is lifted under the condition of load, the inner cylinder of the outer cylinder of the three-stage upright post jack is filled with high-pressure emulsion and pushes the inner cylinder to move upwards, when the inner cylinder moves to a certain position, and the high-pressure emulsion of the outer cylinder flows leftwards from the liquid inlet P port 102 of the valve sleeve 15, the piston 12 moves leftwards when the force of the high-pressure emulsion acting on the conical surface sealing pair of the piston 12 overcomes the spring force of the return spring 11 gradually along with the gradual rising of the high-pressure emulsion on the right side of the conical surface sealing pair formed by the piston 12 and the valve seat 13 and sealed in the valve sleeve cavity 103. The right high-pressure emulsion flows out from the liquid outlet A port 101 and enters the inner cylinder cavity through the liquid inlet P port 102, the valve sleeve cavity 103, the piston 12 conical surface sealing pair and the valve cover cavity 104, so that the movable rod is pushed to move upwards. When the high-pressure emulsion in the inner cylinder reaches saturation, the valve cover inner cavity 104 of the bottom valve is filled with the high-pressure emulsion, and the high-pressure emulsion and the reset spring 11 act on the piston 12 together to close the bottom valve, so that the sequential lifting operation of the column jack is completed. When the hydraulic support is required to descend, the outer cylinder of the column jack is unloaded firstly, after the high-pressure emulsion in the outer cylinder is unloaded, one end of the piston 12 of the bottom valve at the bottom of the inner cylinder is contacted with a boss at the bottom of the outer cylinder, so that the piston 12 can move leftwards, the high-pressure emulsion in the inner cylinder passes through the liquid outlet A port 101, the valve cover inner cavity 104, the piston 12 conical surface hard sealing pair and the valve sleeve inner cavity 103, and is discharged from the liquid inlet P port 102, so that the emulsion in the inner cylinder is unloaded, and the sequential descending operation of the column jack is completed.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (5)
1. The invention discloses a bottom valve, which comprises a valve cover, a reset spring, a piston, a valve pad component, a valve seat and a locking plug, and is characterized in that: the valve gap left end outside is provided with the opposite side platform that supplies the open end spanner to fix, has seted up the inner chamber in the valve gap, has placed the piston in the valve gap inner chamber, has placed reset spring between piston and valve gap inner chamber, has placed the valve pad at the sealed vice right-hand member of conical surface of piston, and the valve pad subassembly has been placed to the right-hand member of valve pad, fixes the valve pad jointly with valve gap department boss.
2. The foot valve according to claim 1, wherein: the right end of the valve cover is in threaded connection with the left end of the valve seat, and a valve seat inner cavity is formed in the valve seat.
3. The foot valve according to claim 1, wherein: the middle section of the valve seat is provided with a thread, the middle section of the thread is provided with a counter bore, and a locking plug is arranged in the counter bore.
4. The foot valve according to claim 1, wherein: an outer hexagonal boss is arranged on the right end face of the valve seat, a through hole is arranged in the center of the end face of the outer hexagonal boss and is communicated with the inner cavity of the valve seat, the right end part of the piston is in clearance fit with the central hole, and liquid inlet holes P are uniformly distributed around the central hole and are communicated with the inner cavity of the valve seat.
5. The foot valve according to claim 1, wherein: the middle section of the piston is provided with a boss, and the section size of the boss is larger than the size of the central hole of the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211157986.4A CN117780398A (en) | 2022-09-22 | 2022-09-22 | Bottom valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211157986.4A CN117780398A (en) | 2022-09-22 | 2022-09-22 | Bottom valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117780398A true CN117780398A (en) | 2024-03-29 |
Family
ID=90384029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211157986.4A Pending CN117780398A (en) | 2022-09-22 | 2022-09-22 | Bottom valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117780398A (en) |
-
2022
- 2022-09-22 CN CN202211157986.4A patent/CN117780398A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |