CN201141305Y - 1200 liter flat type, long service life, anti-pollution coal mine hydraulic support safety valve - Google Patents
1200 liter flat type, long service life, anti-pollution coal mine hydraulic support safety valve Download PDFInfo
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- CN201141305Y CN201141305Y CNU2007201029591U CN200720102959U CN201141305Y CN 201141305 Y CN201141305 Y CN 201141305Y CN U2007201029591 U CNU2007201029591 U CN U2007201029591U CN 200720102959 U CN200720102959 U CN 200720102959U CN 201141305 Y CN201141305 Y CN 201141305Y
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- safety valve
- seal
- coal mine
- antipollution
- valve
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Abstract
The utility model relates to a coal mine hydraulic support safety valve which is 1200 L plane type, has long service life and the antipollution property; the code name is PGK 12 type; the external dimension Phi is 62*272; the flow rate is 1200 L/min and the hydraulic pressure is 30-52MPa; the hydraulic support safety valve belongs to the essential part which protects the coal mine hydraulic support to be safe. The structures of the safety valves in the prior art which are more than 100 L are all plunger safety valves, including the safety valves in U.S., Germany and China. The utility model adopts the plane rubber and the seal structure to manufacture the safety valve which is 1200L and has long service life and antipollution property; the safety valve is characterized in that: 1. based on the structure of external fluid supply and internal discharge flow, the erosive force on the plane rubber seal piece caused the safety valve is reduced by 50 times; 2. long service life: 1) the service life of the six-grade seal pair is one time higher than the single grade service life of the plunger safety valve; 2) the drawing intensity of the seal piece which is combination of nylon fiber and rubber can reach 100 MP; 3) the seal pair has the structure of automatic hydraulic retreating and automatic hydraulic sealing; 3. the concave seal pair in which the coal particles, sand particles can be embedded and hidden has the antipollution function; 4. the safety valve has the open and close structure with high sensitivity; compared with the overseas double machine plunger valve, the safety valve has low machining grade; compared with the overseas 500L/min plunger valve, the safety valve has the advantages of simple structure, low accuracy and reducing the production cost by 20%.
Description
Technical field
The utility model belongs to the hydraulic support control valve of coal mining machinery, and it is the critical component of protection hydraulic support safety, so be referred to as safety valve.Being specifically related to a kind of working hydraulic pressure is 30-52Mpa, and working flow is 1200L/min, and hydraulic fluid is 1200 liters of planes, high life, the antipollution coal mine hydraulic supporting safety valve of emulsion, code name PGK12 type.
Background technology
At present, the home and abroad colliery hydraulic support is to big height (4-5M support) development, the coal seam of exploiting at twice in the past; Primary recovery now, so hydraulic support must be to large-tonnage, big cylinder diameter development, thus need to use high-flow safety valve, and require to improve the life-span, anti pollution property is preferably arranged.
In the prior art, the high-flow safety valve that the home and abroad colliery hydraulic support is commonly used, working flow is the plunger type safety valve greater than 100L/min's fully, for example: U.S. JOY type 4.5M support is introduced in Shen Dong colliery, China Shaanxi, the 500L/min safety valve that uses, it is twin-stage plunger valve (seeing accompanying drawing 9); Colliery, Datong District 5M support is quoted German DAMS type 1000L/min high-flow safety valve, and it has four rows to unload discharge orifice, is twin-stage plunger valve (seeing accompanying drawing 10); Present domestic flow is 100L/min, and model is 32L/min for the ZHYF flow, the safety valve (seeing accompanying drawing 11) of the 300-400L/min of present domestic imitation, and their structure is the plunger type safety valve.
Though the discharge orifice that unloads of plunger type safety valve spool has adopted stainless steel 3crl3, wash away can bear the liquid stream of high pressure, big flow, high flow rate.The operating pressure of plunger type safety valve is 30-50Mpa, and the erosive velocity that unloads flow liquid is about 90-230M/S.The shortcoming of plunger type safety valve: (1) is the sealing of using the rubber round section joint ring because of the seal of its use, belong to the single-stage sealing, unload unloading discharge orifice and must passing through " O " shape sealing ring of when stream spool, the structure of passing through is that the outer ring of unloading discharge orifice must be pressed through the internal diameter of round section joint ring, owing to push the interior circle of the round section joint ring that weares and teares easily, produce and leak, if coal grain or sand grains are arranged by " O " shape sealing ring, promptly can pull the surface in the liquid stream, sealing will seepage; (2) when plunger valve was being opened, spout hole must pass through " O " shape sealing ring, could the overflow unloading, and therefore, climb is long, and valve is when cutting out, and decline just can be closed with equidistant.So the unlatching of valve, to close sensitivity relatively poor.(3) endoporus of the spool cylindrical of plunger valve and valve body (matching), processing fineness and precision are high, and difficulty of processing is big, and maintenance is difficulty also.
In addition, though shortcomings such as sensitivity is relatively poor also exist to be opened, closed to existing planar safety valve good seal performance, high pressure is afraid of in the flat rubber sealing most, and washing away of big flow do not become so develop big flow planar safety valve development both at home and abroad.Domestic colliery support is used, is the plunger type safety valve greater than the safety valve of 10L/min.
Summary of the invention
The utility model is in order to solve the technical problem that prior art midplane safety valve is used for high pressure, big flow coal mine hydraulic supporting safety valve existence, provide a kind of outer feed flow, in unload stream, open, close highly sensitive, 1200 liters of planes of good airproof performance, high life, antipollution coal mine hydraulic supporting safety valve, code name PGK12 type.
The utility model adopts following technical scheme to realize: 1200 liters of planes, high life, antipollution coal mine hydraulic supporting safety valve, comprise the feed liquor valve seat, valve body, spool, combination seal, overcoat, elastomeric element, it is characterized in that feed liquor valve seat and valve body are with being threaded, the junction plate of feed liquor valve seat is provided with the feed flow hole, combination seal is the fine combination seal of Buddhist nun, the fine combination seal of Buddhist nun is installed in the seal groove of feed liquor valve seat right-hand member and with screw and pushes down, be provided with in the spool and unload discharge orifice, be provided with again on the right-hand member of spool is faced the wall and meditated and unload discharge orifice, different 4 planar annulars and two cylindrical surface of the height on the left side of fine combination seal of Buddhist nun and spool constitute the multi-stage sealed pair of spill.The liquid of unloading is crossed the hole of spool through the orifice flow of feed liquor valve seat.The outer ring plane 21 of the multi-stage sealed pair of spill is for opening highly sensitive structure.The interior planar annular 24 of the multi-stage sealed pair of spill is for closing highly sensitive structure.
The fine combination seal of Buddhist nun is made of filling steel mesh and nylon fiber in the polyurethane rubber.
The seal groove inwall of feed liquor valve seat right-hand member is provided with the yielding groove of seal compressive deformation.
Feed liquor valve seat right-hand member is made a concession the groove place and is provided with inlet opening, and this is the structure of hydraulic self-sealing.
Feed liquor valve seat right side is provided with groove, and being increases the sensitivity of opening.
The utility model: the structure of 50 times of scouring forces of a kind of minimizing " unloading stream in the outer feed flow " 1, is provided, has solved the flat rubber seal and be used for high pressure, the problem of flow coal mine hydraulic supporting safety valve greatly.
2, develop the seal of the fine rubber phase combination of six grades of sealing pairs of spill and Buddhist nun, for the plane safety valve has reached the high life.
3, develop the structure of hydraulic self-sealing on valve seat, its function can be eliminated the overflow glue of flat seal, the life-span of improving the plane safety valve again.
4, on the flat seal pair, develop the groove that coal grain or sand grains are hidden in embedding, so the plane safety valve there is resistant to pollution characteristic.
5, on the flat seal pair, be provided with unlatching, close the high structure of sensitivity.On the locating surface of valve seat, be provided with groove, it is to improve the sensitivity of safety valve when opening.
The utility model is design that the new theory with " scouring force of hydraulic pressure and eroding velocity square be directly proportional " instructs (outer feed flow, in unload stream) each other part of plane safety valve, so structure of the present utility model, can reduce 4-7 eroding velocity doubly, just can reduce 16-49 scouring force doubly the flat rubber seal.
The scouring force that 1200 liters of safety valve flat rubbers of the utility model seal bears equates substantially with the scouring force that 200 liters of safety valve flat rubber seals bear, 200 liters of safety valve flat rubber seals are made life test by the MT419-1995 standard, test, so 1200 liters of planes, high life, antipollution coal mine hydraulic supporting safety valves are succeeded in developing certainly.
The fine combination seal of Buddhist nun of the present utility model is formed by filling steel mesh and nylon fiber compacting in the polyurethane rubber, and this seal adopts nylon fiber to do packing material, because of the tensile strength 〉=35kg/mm of nylon fiber
2,, so the tensile strength of the fine combination seal of Buddhist nun is twice than polyurethane rubber, can reach 100MPa.
The seal groove inwall of feed liquor valve seat right-hand member described in the utility model is provided with compressive deformation and makes a concession groove, safety valve is when cutting out, spool is pressed to rubber seal, the rubber seal compressive deformation is made a concession compressive deformation and is made a concession among the groove, and the space of making a concession groove is greater than the rubber deformation amount, when this can guarantee the rubber seal pressurized, be no more than compressive resistance, this is to keep the rebound performance of rubber good, and reality is exactly the high life that keeps seal.
On the yielding groove of valve seat, be drilled with liquid-through hole, when the safety valve pressurized was worked, highly pressurised liquid was pressed to the building rubber compound seal, and rubber plays the function of hydraulic self-sealing, keeps the high life of seal.
The outer ring plane of the multi-stage sealed pair of spill of the present utility model is for opening highly sensitive structure; Interior planar annular is to close highly sensitive structure.
The utility model compared with prior art has the following advantages:
(1) main and German DAMS type 1000L/min twin-stage plunger valve contrast,
(2) also to contrast with U.S. JOY type 500L/min twin-stage plunger valve,
(3) and with the existing various safety valves in domestic colliery contrast
1, the high life: (1) plunger valve is the single-stage sealing, and this plane valve is provided with six grades of sealings, so the life-span exceeds one times.(2) this plane valve is innovated the fine combination seal of a kind of high strength Buddhist nun, is provided with the structure of special pressurized, distortion, yielding again, has both strengthened sealing, prolongs the life-span of seal again.(3) the ad hoc again structure that hydraulic self-sealing is arranged had in addition not only increased sealing but also had prolonged life-span of seal
2, antipollution, the utility model are developed concave channels on spool, it has embedding to hide the function of coal grain and sand grains, so the plane safety valve has resistant to pollution characteristic.
That 3, opens, closes is highly sensitive, plunger valve opens, cuts out must be through the height of 1.2mm, the utility model is provided with special opening structure, just can open through 0.3mm, be provided with the structure of closing specially again, safety valve is when cutting out, when being higher than operating pressure, just begin to close, when closing tight, a little less than operating pressure.So unlatching of the present utility model, close highly sensitive.
4, the utility model is compared with external 1000L/min twin-stage plunger valve, and the accuracy class of processing is low, and simple with external 500L/min plunger valve structure compared, precision is low, and the cost cost all hangs down 20%.
5, economic benefit is very remarkable, and this product can derive from 1000 liters, 500 liters, 300 liters, 200 liters big flows, plane, high life, resistant to pollution safety valve, can be plunger valve and updates.
6, the utility model technology can be used for using on the relevant hydraulic valve such as hydraulic control one-way valve, control valve, electro hydraulic valve of coal mine hydraulic supporting.The utility model technology also can be used for the relevant valve class of oil hydraulic system and uses.
Description of drawings
Fig. 1 is 1200 liters of planes, high life, antipollution coal mine hydraulic supporting safety valve closed condition figure.
Fig. 2 is 1200 liters of planes, high life, antipollution coal mine hydraulic supporting safety valve opening figure.
Fig. 3 is the sectional drawing of the utility model seal 5.
Fig. 4 is the zoomed-in view of the concave channels on the utility model spool 3 end faces.
Fig. 5 is the utility model seal 5, is installed in the feed liquor valve seat 1, with the sectional drawing that screw 4 is fixed, comprises the structure 30,31 of hydraulic self-sealing.
The sectional drawing of Fig. 6 feed liquor valve seat 1
Fig. 7 be the A of Fig. 6 to view, the location end face is provided with special groove 32, it is good to open sensitivity.
The sectional drawing of Fig. 8 valve body 2
Fig. 9 U.S. JOY type 4.5M support diagrammatic sketch of being correlated with
The relevant diagrammatic sketch of Figure 10 Germany DAMS type 1000L/min high-flow safety valve
The safety valve of the 300-400L/min of Figure 11 domestic imitation diagrammatic sketch of being correlated with
Among the figure: 1-feed liquor valve seat, 2-valve body, 3-spool, 4-seal hold-down screw, the fine combination seal of 5-Buddhist nun, 6-spring base, the outer spring of 7-, spring in the 8-, 9-overcoat, 10-regulator bolts, the anti-curved gag lever post of 11-; 12,13,14-" O " sealing ring, 15-steel ball, 16-feed flow hole, 17-junction plate, unload discharge orifice on the 18-valve body, unload discharge orifice in the 19-spool, unload discharge orifice on the 20-spool sidewall, the 21-planar annular, 22-planar annular, 23-planar annular, the 24-planar annular, cylindrical seal face in the 25-Outer cylindrical sealing surface, 26-, the 27-steel mesh, 28-waveform nylon fiber, 29-polyurethane rubber, the 30-compressive deformation is made a concession groove, the inlet opening of 31-automatic hydraulic sealing, and 32-opens the good groove of sensitivity
The specific embodiment
With reference to the accompanying drawings embodiment is further described, present embodiment is to be used for illustrating of the present utility model, rather than the utility model is carried out any restriction.
Present embodiment is a kind of necessary critical component event title safety valve that is used to protect coal mine hydraulic supporting, and appearance and size, diameter are about φ 62 * 272mm.Constitute by feed liquor valve seat 1, valve body 2, spool 3, the fine combination seal 5 of Buddhist nun etc., feed liquor valve seat 1 connects valve body 2, the junction plate 17 of feed liquor valve seat 1 is provided with 16 feed flow holes 16, the fine combination seal 5 of Buddhist nun that is formed by filling steel mesh 27 in the polyurethane rubber 29 and 28 compactings of waveform nylon fiber is installed in the seal groove of feed liquor valve seat 1 right-hand member, fixing with hold-down screw 4,21,22,23,24, two cylindrical seal faces of 4 planar annulars 25,26 of the differing heights on fine combination seal 5 of Buddhist nun and spool 3 left sides constitute the multi-stage sealed pair of spills.Safety valve (when tightening operating pressure) when cutting out rotates regulator bolts 10, the pressure that tightens, press to and be contained in the outer outer spring 7 and interior spring 8 of anti-curved gag lever post, spring base 6 is pressed to spool 3 with the pressure that steel ball 15 bears spring, the right side of the fine combination seal 5 of Buddhist nun is pressed in the left side of spool 3, constitute multi-stage sealed pair, 21,22,23,24 and two cylindrical seal faces of 4 planar annulars 25,26 constitute the multi-stage sealed pair of spill.12,13,14 is " O " seal.When safety valve is being opened, as shown in Figure 2, highly pressurised liquid P
HUnload the unloading in discharge orifice 20 discharge orifice 19 and spool wall on of left side in spool through spool 3 from the feed flow hole 16 of feed liquor valve seat 1 flowed out release, as the low pressure liquid Po among the figure.
The seal groove inwall of feed liquor valve seat 1 right-hand member is provided with compressive deformation and makes a concession groove 30, when safety valve when closing, spool 3 is pressed to the fine combination seal 5 of Buddhist nun, the seal compressive deformation, make a concession compressive deformation and make a concession among the groove 30, when guaranteeing the rubber seal pressurized, be no more than compressive resistance.
The outer ring plane 21 of the multi-stage sealed pair of spill is for opening highly sensitive structure, and interior planar annular 24 is for closing highly sensitive structure.21 planes shown in Figure 4 as spool exceed 0.18mm than 22 planes, and when safety valve was being opened, during pressure rising 2Mpa, spool rising 0.3mm was that safety valve is opened 0.3mm, highly pressurised liquid P
HFlow to plane 21, so the increase of spool compression area, the pressure that spring is pressed to spool is constant, so the hydraulic pressure that needs to open reduces, so open highly sensitive; 24 planes shown in Figure 4 as spool exceed 0.14mm than 22, when safety valve when closing, plane 22 at first is pressed into the fine combination seal 5 of Buddhist nun, the pressure that spring is pressed to seal is constant, but the fine combination seal 5 of Buddhist nun bears the area that the gross area of pressure deducts plane 24, so compression area reduces, so the pressure increase, improved closing presure, closed sensitivity so also improved.Safety valve is when work, and the liquid of high pressure is pressed to combination seal through inlet opening 31 with making a concession groove 30, and seal is pressed to the spool groove, therefore strengthens sealing.Feed liquor valve seat 1 right side is provided with groove 32, and being increases the structure of opening sensitivity.
Claims (7)
1, a kind of 1200 liters of planes, high life, antipollution coal mine hydraulic supporting safety valve, comprise feed liquor valve seat (1), valve body (2), spool (3), combination seal, overcoat (9), elastomeric element, it is characterized in that feed liquor valve seat (1) and valve body (2) are with being threaded, the junction plate (17) of feed liquor valve seat (1) is provided with feed flow hole (16), combination seal is the fine combination seal (5) of Buddhist nun, the fine combination seal of Buddhist nun (5) is installed in the seal groove of feed liquor valve seat (1) right-hand member and pushes down with screw (4), be provided with in the spool (3) and unload discharge orifice (19), on the right-hand member of spool (3) is faced the wall and meditated, be provided with again and unload discharge orifice (20), different 4 planar annulars (21) of height on the left side of fine combination seal of Buddhist nun (5) and spool (3), (22), (23), (24) and two cylindrical surface (25), (26) constitute the multi-stage sealed pair of spill.
2,1200 liters of planes according to claim 1, high life, antipollution coal mine hydraulic supporting safety valve is characterized in that the fine combination seal of described Buddhist nun (5) is by filling steel mesh (27) and nylon fiber (28) formation in the polyurethane rubber (29).
3,1200 liters of planes according to claim 1, high life, antipollution coal mine hydraulic supporting safety valve is characterized in that the seal groove inwall of described feed liquor valve seat (1) right-hand member is provided with the yielding groove (30) of seal compressive deformation.
4,1200 liters of planes according to claim 1, high life, antipollution coal mine hydraulic supporting safety valve is characterized in that described feed liquor valve seat (1) right-hand member makes a concession groove (30) and locate to be provided with inlet opening (31), and this is for forming the structure of hydraulic self-sealing.
5,1200 liters of planes according to claim 1, high life, antipollution coal mine hydraulic supporting safety valve, the outer ring plane (21) that it is characterized in that the multi-stage sealed pair of spill is than the high 0.18mm in plane (22), for opening highly sensitive structure.
6,1200 liters of planes according to claim 1, high life, antipollution coal mine hydraulic supporting safety valve, the planar annular (24) that it is characterized in that the multi-stage sealed pair of spill is than the high 0.14mm in plane (22), for closing highly sensitive structure.
7,1200 liters of planes according to claim 1, high life, antipollution coal mine hydraulic supporting safety valve is characterized in that described feed liquor valve seat (1) right side is provided with groove (32), and being increases the structure of opening sensitivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201029591U CN201141305Y (en) | 2007-10-29 | 2007-10-29 | 1200 liter flat type, long service life, anti-pollution coal mine hydraulic support safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201029591U CN201141305Y (en) | 2007-10-29 | 2007-10-29 | 1200 liter flat type, long service life, anti-pollution coal mine hydraulic support safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201141305Y true CN201141305Y (en) | 2008-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201029591U Expired - Fee Related CN201141305Y (en) | 2007-10-29 | 2007-10-29 | 1200 liter flat type, long service life, anti-pollution coal mine hydraulic support safety valve |
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| Country | Link |
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| CN (1) | CN201141305Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989438A (en) * | 2015-06-16 | 2015-10-21 | 中国矿业大学(北京) | Safety valve on hydraulic support middle vertical shaft |
| CN105569696A (en) * | 2016-03-04 | 2016-05-11 | 辽宁工程技术大学 | Extra-large flow high-pressure erosion-control pressure control valve for hydraulic support |
-
2007
- 2007-10-29 CN CNU2007201029591U patent/CN201141305Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989438A (en) * | 2015-06-16 | 2015-10-21 | 中国矿业大学(北京) | Safety valve on hydraulic support middle vertical shaft |
| CN104989438B (en) * | 2015-06-16 | 2017-03-08 | 中国矿业大学(北京) | Relief valve on hydraulic support central post |
| CN105569696A (en) * | 2016-03-04 | 2016-05-11 | 辽宁工程技术大学 | Extra-large flow high-pressure erosion-control pressure control valve for hydraulic support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081029 Termination date: 20121029 |