CN111236998A - Intrinsically safe electro-hydraulic control reversing valve for aqueous medium mine - Google Patents
Intrinsically safe electro-hydraulic control reversing valve for aqueous medium mine Download PDFInfo
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- CN111236998A CN111236998A CN201911039048.2A CN201911039048A CN111236998A CN 111236998 A CN111236998 A CN 111236998A CN 201911039048 A CN201911039048 A CN 201911039048A CN 111236998 A CN111236998 A CN 111236998A
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- 239000012736 aqueous medium Substances 0.000 title abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 215
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000005065 mining Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000002609 medium Substances 0.000 abstract description 19
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 238000011033 desalting Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Valve Housings (AREA)
Abstract
The invention provides an intrinsically safe electro-hydraulic control reversing valve for an aqueous medium mine. The working medium of the mining electro-hydraulic control reversing valve is water, and the electro-hydraulic control reversing valve comprises: the main valve body is provided with a containing cavity, and a first connecting part is arranged on the inner wall of the containing cavity; the valve core assembly comprises a liquid return threaded sleeve, a second connecting part is constructed on the outer surface of the liquid return threaded sleeve, and the second connecting part is matched with the first connecting part when the valve core assembly is inserted into the accommodating cavity of the main valve body; and carrying out surface hardening treatment on the first connecting part and/or the second connecting part so as to avoid thread gluing in the assembling and/or disassembling process of the first connecting part and the second connecting part.
Description
Technical Field
The invention belongs to the technical field of hydraulic elements, and particularly relates to an intrinsically safe electro-hydraulic control reversing valve for an aqueous medium mine.
Background
The electro-hydraulic control reversing valve is a common mechanical device in coal mining operation.
In recent years, along with the improvement of the coal mining operation requirement of a fully mechanized mining face, the requirements on the stability, the dynamic performance and the service life of the electro-hydraulic control reversing valve are stricter and stricter. The electro-hydraulic control reversing valve is used as a key element for supporting electro-hydraulic control, and the installation between the valve core and the valve body is stable and reliable and has high sealing performance. However, the electro-hydraulic control reversing valves commonly used at present still have some problems. For example, the existing electrohydraulic controlled directional control valve components are usually made of common stainless steel materials, and have poor corrosion resistance and wear resistance. The parts at the matching position of the dynamic sealing pair are made of the same material, so that the dynamic sealing pair has the same hardness, and the problem of clamping stagnation or adhesion is easily caused in the moving process. The toughness and the viscidity of the material at the threaded connection of the parts are relatively large, so that the problems of clamping stagnation and thread gluing are easily generated at the threaded connection, the disassembly of the valve core is further influenced, and the service performance and the service life of the electro-hydraulic control reversing valve are seriously influenced. When the working medium is water, the existing electro-hydraulic control reversing valve cannot meet the requirements of stability, dynamic performance, service life and the like, and the smooth operation of mining operation is seriously influenced.
Therefore, a mining electro-hydraulic control reversing valve capable of effectively avoiding the problems of clamping stagnation or thread gluing in the assembling or disassembling process is needed.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides an intrinsically safe electro-hydraulic control reversing valve for an aqueous medium mine. The mining electro-hydraulic control reversing valve can remarkably enhance the stability and reliability of valve core installation, can effectively avoid the problems of clamping stagnation and thread gluing in the assembling and working processes, and is beneficial to prolonging the service life.
Therefore, according to the invention, the invention provides a mining electro-hydraulic control reversing valve, wherein the working medium of the mining electro-hydraulic control reversing valve is water, and the electro-hydraulic control reversing valve comprises: the main valve body is provided with a containing cavity, and a first connecting part is arranged on the inner wall of the containing cavity; the valve core assembly comprises a liquid return threaded sleeve, a second connecting part is constructed on the outer surface of the liquid return threaded sleeve, and the second connecting part is matched with the first connecting part when the valve core assembly is inserted into the accommodating cavity of the main valve body; and carrying out surface hardening treatment on the first connecting part and/or the second connecting part so as to avoid thread gluing in the assembling and/or disassembling process of the first connecting part and the second connecting part.
In a preferred embodiment, the hardness of the first connection portion and/or the second connection portion is in the range of 200HRC to 320 HRC.
In a preferred embodiment, the temperature for performing the surface hardening treatment on the first connection portion and/or the second connection portion is within the range of 300-600 ℃, and the modulation temperature is higher than the surface treatment temperature.
In a preferred embodiment, the first connecting part and the second connecting part are threads, and sharp corners of the threads formed in the surface hardening process of the first connecting part and/or the second connecting part are subjected to smooth transition treatment.
In a preferred embodiment, the mining electro-hydraulic control reversing valve further comprises a liquid return valve core sleeved inside the liquid return threaded sleeve, and the outer wall surface of the liquid return valve core and the inner wall surface of the liquid return threaded sleeve are subjected to surface hardening treatment.
In a preferred embodiment, the mining electro-hydraulic control reversing valve further comprises a liquid inlet valve core partially sleeved inside the liquid return valve core, and a liquid inlet sleeve sleeved on the outer surface of the liquid inlet valve core and fixedly connected with the liquid return threaded sleeve, wherein the inner surface of the liquid return valve core, the outer surface of the liquid inlet valve core and the inner surface of the liquid inlet sleeve are subjected to surface hardening treatment.
In a preferred embodiment, sealing elements are arranged between the liquid return valve core and the liquid return threaded sleeve, between the liquid inlet valve core and the liquid return valve core and between the liquid inlet valve core and the liquid inlet sleeve, so as to form dynamic sealing pairs, and the sealing elements are made of molybdenum disulfide or polytetrafluoroethylene materials.
In a preferred embodiment, the diameter of the liquid passing hole on the bottom surface of the liquid return valve core is smaller than that of the matching surface with the liquid inlet valve core.
In a preferred embodiment, a valve seat is fixedly installed at the joint of the liquid inlet sleeve and the liquid return threaded sleeve, and a metal hard seal can be formed when the liquid inlet valve core or the liquid return valve core is in contact with the valve seat.
In a preferred embodiment, the pH of the water is between 6 and 9 and the conductivity of the water is less than 300. mu.s/cm.
Drawings
The invention will now be described with reference to the accompanying drawings.
Fig. 1 shows the structure of a valve core assembly in the intrinsically safe electro-hydraulic reversing valve for the aqueous medium mine according to the invention.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
It should be noted that directional terms or limitations used in the present application, such as "upper", "lower", "front", "rear", "left", "right", and the like, refer to fig. 1 as a reference. They are not intended to limit the absolute positions of the parts involved, but may vary from case to case.
The intrinsically safe electro-hydraulic reversing valve for the aqueous medium mine comprises a main valve body (not shown). Several receiving chambers (not shown) are arranged in the main valve body and are distributed at regular intervals. A valve core assembly 100 is respectively installed in each accommodating cavity. The valve cartridge assembly 100 may be a large valve cartridge, a small valve cartridge, or a differential valve cartridge.
Fig. 1 shows the construction of a valve core assembly 100. As shown in fig. 1, the valve core assembly 100 includes an inlet sleeve 111 and a return threaded sleeve 112 fixedly connected to the inlet sleeve 111. The inlet housing 111 is formed in a hollow cylindrical shape, and a first mounting portion extending axially outward is provided at one axial end surface (right end in fig. 1) of the inlet housing 111, and a first shoulder is formed at the axially inner side of the inlet housing 111. The liquid return thread insert 112 is substantially cylindrical, and a cylindrical cavity extending axially inwards is arranged on the axial end face of the liquid return thread insert 112 connected with the liquid inlet sleeve 111. Meanwhile, a second mounting part extending axially outwards is arranged on the axial end face of the cylindrical cavity, so that a second shoulder is formed on the axial end face of the liquid return thread sleeve 112. The inner diameter of the second mounting portion is equal to the outer diameter of the first mounting portion of the inlet sleeve 111. The liquid inlet sleeve 111 and the liquid return threaded sleeve 112 are in adaptive connection through a first mounting part and a second mounting part and are fastened through bolts to form fixed connection. A valve seat 113 is also mounted between the first shoulder of the inlet sleeve 111 and the second shoulder of the return threaded sleeve 112, the function of the valve seat 113 being described below.
In this embodiment, a plurality of circumferentially uniformly distributed liquid return ports R are provided on the axially inner side wall of the liquid inlet sleeve 111 in the first mounting portion. Preferably, the extending direction of the liquid return port R is disposed at an angle with the axial direction of the liquid inlet sleeve 111. A plurality of circumferentially uniformly distributed liquid inlets P (high pressure ports) are arranged on the side wall of the liquid return thread insert 112 which is positioned on the inner side in the axial direction of the second mounting part. Meanwhile, a counter bore extending axially is formed in the center of the bottom of the cylindrical cavity, a control port K extending radially is formed in the axial inner side, located in the cylindrical cavity, of the liquid return threaded sleeve 112, and the control port K extends to the center from the outer side of the side wall of the liquid return threaded sleeve 112 and is communicated with the counter bore so as to be communicated with the cylindrical cavity.
As shown in fig. 1, the valve core assembly 100 further includes a liquid inlet valve core 114, and the liquid inlet valve core 114 is installed in an inner cavity formed after the liquid inlet sleeve 111 and the liquid return threaded sleeve 112 are connected. The liquid inlet valve core 114 is configured in a cylindrical shape and one end is closed, so that a cylindrical liquid inlet chamber is formed inside the liquid inlet valve core 114, and an open end of the liquid inlet valve core 114 is formed as a working port a. An annular bulge extending radially outwards is arranged on the outer side of the side wall of the liquid inlet valve core 114 close to the middle part. Meanwhile, an inner wall of the liquid inlet sleeve 111 close to the axial outer end is provided with a radially inward annular extension part, so that a shoulder part is formed at the position of the liquid inlet sleeve 111 close to the axial outer end face. A spring 115 is sleeved outside the liquid inlet valve core 114, and two ends of the spring 115 respectively abut against a shoulder part of the liquid inlet sleeve 111 and a shaft end surface on one side of the annular bulge of the liquid inlet valve core 114. In the initial state, the liquid inlet valve core 114 makes the annular bulge abut against the axial end face of the valve seat 113 at the joint of the liquid inlet sleeve 111 and the liquid return threaded sleeve 112 under the action of the spring 115. A plurality of side wall through holes 118 which are axially and uniformly distributed are arranged on the side wall of the liquid inlet valve core 114 close to the closed end. The side wall through hole 118 is selectively communicated with a liquid return port R on the liquid inlet sleeve 111 or a high pressure port P on the liquid return threaded sleeve 112. The axial two ends of the valve seat 113 can respectively form axial limit to the liquid inlet valve core 114 and the liquid return valve core 116. In addition, in the initial state, a metal hard seal is formed between the axial end face of the liquid inlet valve element 114 and the axial end face of one side of the valve seat 113, and in the working state, a metal hard seal is formed between the axial end face of the liquid return valve element 116 and the axial end face of the other side of the valve seat 113.
According to the present invention, the cartridge assembly 100 further includes a liquid return cartridge 116. The liquid return valve core 116 is installed in the cylindrical cavity of the liquid return threaded sleeve 112. The liquid return valve core 116 is configured to be cylindrical with a bottom, one end with the bottom is installed on the inner side in the axial direction, and a liquid passing hole is formed in the center of the bottom and is communicated with the control port K through a counter bore. The closed end of the liquid inlet valve core 114 extends into the cylindrical structure of the liquid return valve core 116, and the liquid inlet valve core 114 is in sealing fit with the liquid return valve core 116. The diameter of the liquid passing hole at the bottom of the liquid return valve core 116 is smaller than the diameter of the matching surface with the liquid inlet valve core 114, so that the liquid return valve core 116 can be driven to return to the initial state in the resetting process of the liquid inlet valve core 114. At the moment that the valve core assembly 100 opens the liquid inlet valve core 114, the liquid return valve core 116 is not closed yet, so that the pressurization effect can be effectively avoided.
The valve core assembly 100 has two working states, when the valve core assembly 100 is in a zero position, the working port a of the liquid inlet valve core 111 is communicated with the liquid return port R, at the moment, the pressure is zero, and the liquid inlet P is closed. When the valve core assembly 100 is in the working position, under the pressure controlled by the control port K, the liquid return valve core 116 is pushed to move axially and outwardly until the liquid return port R is closed, and then the liquid inlet valve core 114 is driven to continue to move axially and outwardly and overcome the acting force of the spring 115, so that the liquid inlet P is opened, the liquid inlet P is communicated with the working port a, and therefore the valve core assembly 100 is opened to enter the working state. When the control pressure is removed from the control port K, the liquid inlet valve core 114 moves axially inward to reset under the action of the spring 115, so that the liquid inlet P is closed, the working port a is communicated with the liquid return port R, and the liquid return port returns to a zero position.
In the working process of the valve core assembly 100, the working pressure of the valve core assembly 100 can generally reach 40 MPa. In order to ensure the sealing between the matching surfaces of the liquid inlet valve core 114 and the liquid inlet sleeve 111, the liquid inlet valve core 114 and the liquid return valve core 116, and the liquid return valve core 116 and the liquid return threaded sleeve 112. Sealing elements are arranged between matching surfaces of the liquid inlet valve core 114 and the liquid inlet sleeve 111, between the liquid inlet valve core 114 and the liquid return valve core 116, and between matching surfaces of the liquid return valve core 116 and the liquid return threaded sleeve 112, so that a dynamic sealing pair is formed. Preferably, the seal is made of molybdenum disulfide or polytetrafluoroethylene material. This can guarantee that the sealing member has lower friction and the wearability is high to can guarantee the sealing performance of the dynamic seal pair between the mating surfaces of feed liquid case 114 and feed inlet cover 111, feed liquid case 114 and return liquid case 116, return liquid case 116 and return liquid thread insert 112.
According to the present invention, the valve core assembly 100 is cartridge-mounted in the main valve body, and the valve core assembly 100 is fixedly mounted in the main valve body by means of screw connection. As shown in fig. 1, a second connection portion 120 is provided on an outer wall surface of the return screw sleeve 112 away from the end to which the return valve body 116 is attached. Meanwhile, a first connecting portion (not shown) is provided at an inner wall surface of the accommodating chamber in the main valve body. The valve core assembly 100 is securely mounted within the main valve body by the second connection 120 mating with the first connection. In one embodiment, the second connection portion 120 and the first connection portion are threaded.
The invention has the important improvement that the working medium of the intrinsically safe electro-hydraulic control reversing valve for the water medium mine is water. The water is, for example, primary treated water (or water with low treatment degree) which is subjected to only one-stage reverse osmosis desalination, or the water can be directly used if local tap water or well water and the like meet requirements. The primary treated water is not subjected to subsequent other desalting treatment, such as two-stage reverse osmosis desalting or more-stage reverse osmosis desalting, or electric desalting. The PH of this water may be between 6 and 9, which can prevent corrosion of the corresponding components of the cartridge assembly 100 (particularly the inlet cartridge, the return cartridge, and the valve seat). The conductivity of the water can be between 0 and 300 mu S/cm, and the corresponding elements (particularly the liquid inlet valve core, the liquid return valve core and the valve seat) of the valve core assembly 100 can be prevented from rusting. In other words, the valve core assembly 100 of the invention can use the water to ensure the normal operation of the mining electro-hydraulic reversing valve.
In order to ensure that the mining electro-hydraulic control reversing valve can adopt water with lower purity as a working medium, the mining electro-hydraulic control reversing valve is further improved as follows.
The liquid return threaded sleeve 112, the liquid inlet valve core 114 and the liquid return valve core 116 in the valve core assembly 100 can be made of high-strength corrosion-resistant and wear-resistant stainless steel materials. Then, the liquid returning screw sleeve 112, the liquid inlet sleeve 111, the valve seat 113, the liquid inlet valve core 114, and the liquid returning valve core 116 are subjected to surface hardening treatment. For example, the surface hardening treatment of these parts can be achieved through the processes of preheating, ceramic infiltration, curing, cleaning, drying, and the like. Therefore, the parts are ensured to have enough hardness to meet the actual working requirement, so that the corrosion resistance and the wear resistance of the parts are improved, clamping stagnation and adhesion between the second connecting part 120 of the liquid return screw sleeve 112 and the main valve body in the mounting or dismounting process can be avoided, and the liquid return screw sleeve 112 is convenient to mount and dismount.
In this embodiment, the temperature for performing the surface hardening treatment on the liquid return screw sleeve 112, the liquid inlet sleeve 111, the valve seat 113, the liquid inlet valve core 114 and the liquid return valve core 116 is within the range of 300-. During the surface treatment, the conditioning temperature is higher than the surface treatment temperature.
Preferably, the hardness (or surface hardness) of the surface-hardened liquid returning thread sleeve 112, the liquid inlet sleeve 111, the valve seat 113, the liquid inlet valve core 114 and the liquid returning valve core 116 can be between 200HRC and 320HRC, so that the rated pressure of the electro-hydraulic control reversing valve for the water medium mine can be allowed to be up to 40 MPa. In addition, the corrosion resistance, the wear resistance and the sealing performance of the electro-hydraulic control reversing valve for the aqueous medium mine can be effectively improved, and the service life of the electro-hydraulic control reversing valve is greatly prolonged.
In order to meet the use requirement of the mining electro-hydraulic control reversing valve, in the process of performing surface hardening treatment on the second connecting part 120 of the liquid return thread insert 112, smooth transition treatment needs to be performed on a thread sharp corner formed on the thread surface of the thread (the first connecting part) of the liquid return thread insert 112. Therefore, the problem that the sharp angle of the thread falls off due to embrittlement can be effectively avoided, the normal use of parts is further prevented from being influenced, and the corrosion resistance and the wear resistance are improved. Meanwhile, the thread gluing problem of the threaded connection part in the mounting or dismounting process can be avoided, and the service life of the threaded connection part is further prolonged.
The surface hardness of the second connecting part 120 of the liquid return thread insert 112, the liquid inlet valve core 114 and the liquid return valve core 116 can be effectively improved through surface hardening treatment. Furthermore, it is also advantageous to prevent the surface thereof from rusting. This is very important for using water of lower purity as the working medium. Furthermore, water itself is slightly less effective in lubricating than an emulsion. Therefore, the surface hardening treatment is also beneficial to avoiding the clamping stagnation or the adhesion between the liquid inlet sleeve 111 and the liquid inlet valve core 114, between the liquid inlet valve core 114 and the liquid return valve core 116 and between the liquid return valve core 116 and the liquid return screw sleeve 112, so that the lubricating effect between the liquid inlet valve core and the liquid return valve core is improved, and the smoothness of the actions between the liquid inlet valve core and the liquid return valve core is ensured. This is also very important for the use of less pure water as the working medium.
In one embodiment, the first and second connection portions 120 are hardened to have a hardness difference sufficient to prevent galling. Therefore, the two parts have different hardness differences, and the problem of clamping stagnation or thread gluing between the parts in the mounting or dismounting process can be avoided.
It should be understood that the liquid inlet sleeve 111 and the liquid inlet valve core 114, the liquid inlet valve core 114 and the liquid return valve core 116, and the liquid return valve core 116 and the liquid return threaded sleeve 112, which are in dynamic sealing fit, may also be made of different materials, so as to have different surface hardness between parts in dynamic sealing fit, thereby avoiding the problems of clamping stagnation and adhesion during the movement. However, on the one hand, this may result in one of the parts actuating the sealing engagement being too hard to be damaged easily, greatly reducing the service life of the electrohydraulic operated directional valve for aqueous medium mines. On the other hand, this may also result in the hardness of another of the parts that actuate the sealing engagement being too high, which greatly increases the manufacturing costs and also complicates the manufacturing process very much. Therefore, for the electro-hydraulic control reversing valve for the water medium mine, the functions of improving the surface hardness of parts, improving the corrosion resistance and wear resistance, preventing the surface from rusting and avoiding adhesion are preferably realized simultaneously through surface hardening treatment.
According to the invention, the electro-hydraulic control reversing valve for the water medium mine further comprises a plurality of groups of electromagnetic pilot valve groups, and the electromagnetic pilot valve groups are used for electro-hydraulic control of the valve core groups. Each set of electromagnetic pilot valves includes two electromagnetic pilot valves, and each electromagnetic pilot valve controls one valve core assembly 100 correspondingly. The electromagnetic pilot valve comprises a switch electromagnetic valve and a two-position three-way pilot valve, and the valve core assembly is a hydraulic control two-position three-way valve.
According to the invention, a liquid inlet pipeline and a liquid return pipeline are arranged in the main valve body. In the working process, high-pressure liquid is divided into two paths after entering from the liquid inlet of the liquid inlet pipeline. One path supplies liquid to the valve core assembly 100, and the other path supplies liquid to the electromagnetic pilot valve. The return liquid of the low-pressure liquid comprises two paths, wherein one path is the return liquid from the valve core assembly 100, and the other path is the return liquid from the electromagnetic pilot valve. Each functional port of the electro-hydraulic control reversing valve for the water medium mine is formed by an electromagnetic pilot valve and a valve core assembly 100 of a hydraulic control two-position three-way valve, and the two functional ports of one valve can be simultaneously actuated to simultaneously supply liquid.
The working state of one functional port of the electro-hydraulic control reversing valve for the water medium mine is explained below.
When the electro-hydraulic control reversing valve for the water medium mine is in a zero position, an electromagnet circuit of the electromagnetic pilot valve is disconnected, no output force is generated, and at the moment, a working port of the electromagnetic pilot valve is communicated with a liquid return port. Meanwhile, the valve core assembly 100 is also in a zero position under the action of the spring 115, and the working port a of the valve core assembly 100 is separated from the high-pressure port P and communicated with the liquid return port R. When the electro-hydraulic control reversing valve for the water medium mine is in a working position, the electromagnet of the electromagnetic pilot valve is electrified to generate magnetic force and attract the pressure rod, so that the pilot valve is opened and enters a working state. At this time, the working port of the pilot valve communicates with the high-pressure port and is separated from the liquid return port, so that high-pressure liquid is input to the control port K of the valve core assembly 100. The high-pressure liquid pushes the liquid return valve core 116 and the liquid inlet valve core 114 of the valve core assembly 100, so that the working port A of the valve core assembly 100 is disconnected from the liquid return port R and is connected with the high-pressure port P. Therefore, the working port A of the electro-hydraulic control reversing valve for the water medium mine outputs high-pressure liquid and enters a working state.
According to the mining electro-hydraulic control reversing valve for the water medium mine, the surface hardening treatment is performed on the second connecting part 120 on the surface of the liquid return threaded sleeve 112, so that the corrosion resistance and the wear resistance of the second connecting part 120 of the liquid return threaded sleeve 112 are remarkably improved, meanwhile, the clamping stagnation or thread gluing between the liquid return threaded sleeve 112 and a main valve body in the mounting or dismounting process can be effectively avoided, and the mounting and dismounting of the liquid return threaded sleeve 112 are facilitated. Meanwhile, the parts in contact with the working medium, namely the liquid inlet sleeve 111, the liquid inlet valve core 114, the liquid inlet sleeve 111 and the liquid return screw sleeve 112, are subjected to surface hardening treatment, so that the corrosion resistance and the wear resistance of the parts are remarkably improved, and the clamping stagnation or adhesion between the liquid inlet sleeve 111 and the liquid inlet valve core 114, between the liquid inlet valve core 114 and the liquid return valve core 116 and between the liquid return valve core 116 and the liquid return screw sleeve 112 in the working process is avoided, so that the lubricating effect between the parts is improved, and the action smoothness between the parts is ensured. The mining operation can be carried out more smoothly, and the service life of the electro-hydraulic control reversing valve for the aqueous medium mine is obviously prolonged. In addition, the water (especially the water with low treatment degree) is used as the working medium, so that the pollution to the environment can be effectively avoided.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The mining electro-hydraulic control reversing valve is characterized in that a working medium of the mining electro-hydraulic control reversing valve is water, and the electro-hydraulic control reversing valve comprises:
the main valve body is provided with a containing cavity, and a first connecting part is arranged on the inner wall of the containing cavity; and
the valve core assembly (100) comprises a liquid return threaded sleeve (112), a second connecting part (120) is constructed on the outer surface of the liquid return threaded sleeve, and the second connecting part is matched with the first connecting part when the valve core assembly is inserted into the accommodating cavity of the main valve body;
and carrying out surface hardening treatment on the first connecting part and/or the second connecting part so as to avoid thread gluing in the assembling and/or disassembling process of the first connecting part and the second connecting part.
2. The mining electro-hydraulic control directional valve of claim 1, wherein the hardness of the first connection portion and/or the second connection portion is in a range of 200HRC to 320 HRC.
3. The mining electro-hydraulic control reversing valve according to claim 1 or 2, characterized in that the temperature for surface hardening treatment of the first connecting part and/or the second connecting part is in the range of 200-600 ℃, and the modulation temperature is higher than the surface treatment temperature.
4. The mining electro-hydraulic control reversing valve according to any one of claims 1 to 3, characterized in that the first connecting part and the second connecting part are threads, and sharp corners of the threads formed in the surface hardening process of the first connecting part and/or the second connecting part are subjected to rounding.
5. The mining electrohydraulic controlled reversing valve according to claim 1, further comprising a liquid return valve core (116) sleeved inside the liquid return threaded sleeve, and the outer wall surface of the liquid return valve core and the inner wall surface of the liquid return threaded sleeve are subjected to surface hardening treatment.
6. The mining electrohydraulic control reversing valve according to claim 5, further comprising a liquid inlet valve core (114) partially sleeved inside the liquid return valve core, and a liquid inlet sleeve (111) sleeved on the outer surface of the liquid inlet valve core and fixedly connected with the liquid return threaded sleeve,
and surface hardening treatment is carried out on the inner surface of the liquid return valve core, the outer surface of the liquid inlet valve core and the inner surface of the liquid inlet sleeve.
7. The mining electro-hydraulic control reversing valve according to claim 6, characterized in that sealing elements are arranged between the liquid return valve core and the liquid return threaded sleeve, between the liquid inlet valve core and the liquid return valve core, and between the liquid inlet valve core and the liquid inlet sleeve, so as to form dynamic sealing pairs, and the sealing elements are made of molybdenum disulfide or polytetrafluoroethylene materials.
8. The mining electro-hydraulic directional valve according to claim 2, characterized in that the diameter of a liquid through hole (117) in the bottom surface of the liquid return valve core is smaller than the diameter of the matching surface with the liquid inlet valve core.
9. The mining electro-hydraulic control reversing valve according to claim 6, characterized in that a valve seat (123) is fixedly installed at the joint of the liquid inlet sleeve and the liquid return threaded sleeve, and a metal hard seal can be formed when the liquid inlet valve core or the liquid return valve core is in contact with the valve seat.
10. The mining electro-hydraulic directional control valve of claim 1, wherein the PH of the water is between 6 and 9 and the conductivity of the water is less than 300 μ s/cm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718925A (en) * | 2022-04-26 | 2022-07-08 | 北京天玛智控科技股份有限公司 | Three-stage hydraulic speed regulating system and hydraulic support |
| CN114876893A (en) * | 2022-04-26 | 2022-08-09 | 北京天玛智控科技股份有限公司 | Two-stage hydraulic speed regulating system and hydraulic support |
| WO2023206747A1 (en) * | 2022-04-26 | 2023-11-02 | 北京天玛智控科技股份有限公司 | Multi-stage hydraulic speed regulation system, and hydraulic support |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986003568A1 (en) * | 1984-12-11 | 1986-06-19 | Gevipi A.G. | A single handle mixing valve having a hydraulic responsive member pressing the cartridge |
| CN2705646Y (en) * | 2003-12-17 | 2005-06-22 | 温州市基安机械有限公司 | Guide liquid control change valve group |
| CN201460924U (en) * | 2009-04-30 | 2010-05-12 | 山西平阳重工机械有限责任公司 | Intrinsic safety type electric pilot operated directional control valve for mine |
| CN101871537A (en) * | 2010-06-21 | 2010-10-27 | 山西平阳广日机电有限公司 | Mining intrinsic safety electro-hydraulic control reversing valve core component |
| CN102943909A (en) * | 2012-10-19 | 2013-02-27 | 华中科技大学 | Differential type water hydraulic relief valve |
| CN202834247U (en) * | 2012-09-05 | 2013-03-27 | 北京工业大学 | Pure water hydraulic electromagnetism unloading overflow valve |
| CN103510970A (en) * | 2013-09-27 | 2014-01-15 | 巨隆集团芜湖兴隆液压有限公司 | Valve element assembly of reversing valve for fully-mechanized coal mining hydraulic support |
| CN203515637U (en) * | 2013-09-05 | 2014-04-02 | 浙江长河机械制造有限公司 | Pilot-operated check valve for hydraulic support |
| CN206647115U (en) * | 2017-04-05 | 2017-11-17 | 乐清市东风煤矿设备有限公司 | A kind of reversal valve |
| CN206845202U (en) * | 2017-05-10 | 2018-01-05 | 巨隆集团芜湖兴隆液压有限公司 | Chip electric-hydraulic control reversing valve |
| CN107859524A (en) * | 2017-10-27 | 2018-03-30 | 鸿大智能机械有限公司 | The core assembly of hydraulic control one-way valve |
| CN211648223U (en) * | 2019-10-29 | 2020-10-09 | 北京天地玛珂电液控制系统有限公司 | Intrinsically safe electro-hydraulic control reversing valve for aqueous medium mine |
-
2019
- 2019-10-29 CN CN201911039048.2A patent/CN111236998A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986003568A1 (en) * | 1984-12-11 | 1986-06-19 | Gevipi A.G. | A single handle mixing valve having a hydraulic responsive member pressing the cartridge |
| CN2705646Y (en) * | 2003-12-17 | 2005-06-22 | 温州市基安机械有限公司 | Guide liquid control change valve group |
| CN201460924U (en) * | 2009-04-30 | 2010-05-12 | 山西平阳重工机械有限责任公司 | Intrinsic safety type electric pilot operated directional control valve for mine |
| CN101871537A (en) * | 2010-06-21 | 2010-10-27 | 山西平阳广日机电有限公司 | Mining intrinsic safety electro-hydraulic control reversing valve core component |
| CN202834247U (en) * | 2012-09-05 | 2013-03-27 | 北京工业大学 | Pure water hydraulic electromagnetism unloading overflow valve |
| CN102943909A (en) * | 2012-10-19 | 2013-02-27 | 华中科技大学 | Differential type water hydraulic relief valve |
| CN203515637U (en) * | 2013-09-05 | 2014-04-02 | 浙江长河机械制造有限公司 | Pilot-operated check valve for hydraulic support |
| CN103510970A (en) * | 2013-09-27 | 2014-01-15 | 巨隆集团芜湖兴隆液压有限公司 | Valve element assembly of reversing valve for fully-mechanized coal mining hydraulic support |
| CN206647115U (en) * | 2017-04-05 | 2017-11-17 | 乐清市东风煤矿设备有限公司 | A kind of reversal valve |
| CN206845202U (en) * | 2017-05-10 | 2018-01-05 | 巨隆集团芜湖兴隆液压有限公司 | Chip electric-hydraulic control reversing valve |
| CN107859524A (en) * | 2017-10-27 | 2018-03-30 | 鸿大智能机械有限公司 | The core assembly of hydraulic control one-way valve |
| CN211648223U (en) * | 2019-10-29 | 2020-10-09 | 北京天地玛珂电液控制系统有限公司 | Intrinsically safe electro-hydraulic control reversing valve for aqueous medium mine |
Non-Patent Citations (1)
| Title |
|---|
| 杨明杰;: "液压支架新型换向阀性能分析与研究", 液压气动与密封, no. 03, 15 June 2009 (2009-06-15) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718925A (en) * | 2022-04-26 | 2022-07-08 | 北京天玛智控科技股份有限公司 | Three-stage hydraulic speed regulating system and hydraulic support |
| CN114876893A (en) * | 2022-04-26 | 2022-08-09 | 北京天玛智控科技股份有限公司 | Two-stage hydraulic speed regulating system and hydraulic support |
| WO2023206747A1 (en) * | 2022-04-26 | 2023-11-02 | 北京天玛智控科技股份有限公司 | Multi-stage hydraulic speed regulation system, and hydraulic support |
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Address after: No. 27, Linhe Avenue, Shunyi District, Beijing 100013 (Science and technology innovation functional area) Applicant after: CCTEG Beijing Tianma Intelligent Control Technology Co.,Ltd. Applicant after: BEIJING CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. Address before: No. 27, Linhe Avenue, Shunyi District, Beijing 100013 (Science and technology innovation functional area) Applicant before: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. Applicant before: BEIJING CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. |