CN211501147U - Ultrahigh-pressure large-flow high-water-base unloading valve - Google Patents
Ultrahigh-pressure large-flow high-water-base unloading valve Download PDFInfo
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- CN211501147U CN211501147U CN201922501702.9U CN201922501702U CN211501147U CN 211501147 U CN211501147 U CN 211501147U CN 201922501702 U CN201922501702 U CN 201922501702U CN 211501147 U CN211501147 U CN 211501147U
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Abstract
The utility model belongs to the technical field of mining emulsion pump station equipment, and relates to an unloading valve with ultrahigh pressure, large flow and high water base, which comprises a main valve body, wherein one side of the main valve body is matched and connected with a pilot valve body, and the other side of the main valve body is matched and connected with a check valve body; the pilot valve body is provided with a pilot valve cavity, a left oil duct of the pilot valve cavity is communicated with an outlet of the unloading valve of the main valve body, a middle oil duct of the pilot valve cavity is communicated with an upper cavity of the main valve body, and a right oil duct of the pilot valve cavity is communicated with a one-way valve cavity of the one-way valve body; the upper cavity of the main valve body is internally provided with a main valve sleeve, the upper end of the main valve sleeve is abutted against and contacted with the pilot valve body, the lower end of the main valve sleeve is provided with a labyrinth block component, the labyrinth block component is supported on a main valve seat, and the main valve seat is arranged on the main valve body. The unloading valve can meet the requirements of working conditions, greatly reduce the influence of cavitation and erosion on the main valve and prolong the service life of the unloading valve.
Description
Technical Field
The utility model belongs to the technical field of mining emulsion pump station equipment, a unloading valve of the large-traffic high water base of superhigh pressure is related to.
Background
The coal mining amount of China is extremely large and is at the top of the world, and the underground mining amount is dominant in the coal mining of China. Due to the special working condition of underground coal mining operation and the complexity and relevance of a hydraulic system, the pressure of an emulsion pump station is often fluctuated by a hydraulic support in the working process, and the timely adjustment of the pressure of the emulsion pump station is very important.
The unloading valve is an important pressure control element for realizing automatic pressure regulation of the emulsion pump station. The function of the pump is to meet the requirement of intermittent liquid use of the fully mechanized working face under the condition that the pump is continuously operated, so that the liquid supply pressure of a pump station is always kept in a set range. Because the underground coal mining hydraulic system is in a discontinuous working state, the pressure of the system is reduced through the unloading valve when the hydraulic support does not act and the pressure of liquid discharged by the emulsion pump station is greater than the working pressure of the system, so that the pump is unloaded at an extremely low pressure to protect the emulsion pump station and the whole hydraulic system; when the hydraulic support needs to work or the pressure is reduced, the unloading valve must immediately recover the pressure and the flow so as to ensure the normal work of the coal face.
Disclosure of Invention
The utility model aims at the above problem, a large-traffic high water base's of superhigh pressure unloading valve is provided, this unloading valve can satisfy the operating mode requirement, and again greatly reduced cavitation erosion and erosion can improve the life of unloading valve to the influence of main valve.
According to the technical scheme of the utility model: the utility model provides an unloading valve of big flow high water base of superhigh pressure which characterized in that: the valve comprises a main valve body, wherein one side of the main valve body is matched and connected with a pilot valve body, and the other side of the main valve body is matched and connected with a one-way valve body;
the pilot valve body is provided with a pilot valve cavity, a left oil duct of the pilot valve cavity is communicated with an outlet of the unloading valve of the main valve body, a middle oil duct of the pilot valve cavity is communicated with an upper cavity of the main valve body, and a right oil duct of the pilot valve cavity is communicated with a one-way valve cavity of the one-way valve body;
the main valve seat is arranged on the main valve body, and the main part of the labyrinth block component is arranged in an unloading valve outlet of the main valve body.
As a further improvement of the present invention, the right side oil passage of the pilot valve body is communicated with the check valve cavity of the check valve body via the oil passage of the main valve body.
As the utility model discloses a further improvement, the pilot valve body is including setting up in the pilot valve case, the pilot valve spring holder of its inner chamber, set up the pilot valve spring between pilot valve case and the pilot valve spring holder, the terminal surface fastening pilot valve end cover of pilot valve body, threaded connection pressure regulating bolt carries out corresponding axial to the pilot valve spring holder along the pilot valve body and adjusts on the pilot valve end cover, the inner chamber of pilot valve body still is provided with the pilot valve disk seat, and the hole of pilot valve disk seat sets up the ejector pin, and the ejector pin can promote the pilot valve case and remove at the inner chamber of pilot valve body earlier, set up the plug with the relative.
As a further improvement, the check valve body includes check valve case, check valve block, check valve spring and check valve end cover, check valve block interference fit installs in the check valve body, check valve case one end cooperates with the check valve block, and the other end carries on spacingly through the check valve end cover, and check valve spring one end compresses tightly on the check valve case, and the other end compresses tightly on the check valve end cover.
As a further improvement of the utility model, the labyrinth subassembly includes that top-down sets up labyrinth piece upper end cover, labyrinth piece one, labyrinth piece two, labyrinth piece baffle, labyrinth piece lower extreme cover.
The technical effects of the utility model reside in that: the one-way valve is integrated in the unloading valve body, so that the arrangement of pipelines in the system can be reduced, and the structure of the system is more compact. The unloading valve is an important pressure control element for realizing automatic pressure regulation of the emulsion pump station. The function of the pump is to meet the requirement of intermittent liquid use of the fully mechanized working face under the condition that the pump is continuously operated, so that the liquid supply pressure of a pump station is always kept in a set range. However, the service life of a common high-pressure large-flow unloading valve is short due to the action of cavitation and erosion, and the continuous operation of the system is influenced. The labyrinth block assembly and the traditional unloading valve are combined, so that the influence of cavitation and erosion on the main valve can be reduced, and the service life of the unloading valve is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of an ultrahigh-pressure high-flow high-water-base unloading valve.
Fig. 2 is a schematic structural diagram of a labyrinth block assembly of the ultrahigh-pressure large-flow high-water-base unloading valve.
Fig. 3 is a functional schematic diagram of the base unloading valve with ultrahigh pressure, large flow and high water content.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
In fig. 1 to 3, the pilot valve assembly includes a pilot valve end cover 1, a pressure regulating screw 2, a pilot valve body 3, a pilot valve spring seat 4, a pilot valve spring 5, a pilot valve spool 6, a main valve sleeve 7, a labyrinth block assembly 8, a labyrinth upper end cover 8.1, a labyrinth piece one 8.2, a labyrinth piece two 8.3, a labyrinth piece baffle 8.4, a labyrinth piece lower end cover 8.5, a main valve spring 9, a check valve end cover 10, a check valve spring 11, a check valve spool 12, a check valve body 13, a check valve seat 14, a main valve body 15, a main valve seat 16, a main valve spool 17, a plug 18, a push rod 19, a pilot valve seat 20, an oil tank 21, an emulsion pump 22, a check valve 23, an accumulator 24, a main valve 25, a pilot valve 26, and the like.
As shown in figure 3, the utility model discloses as shown in the attached drawing, the invention relates to an unloading valve of superhigh pressure large-traffic high water base. The unloading valve comprises three valve bodies: pilot valve 26, main valve 25, check valve 23 and labyrinth block assembly 8. The three valve bodies include a pilot valve body 3, a main valve body 15, and a check valve body 13. The pilot valve body 3 comprises a pilot valve cavity. The pilot valve cavity is communicated with an outlet of an unloading valve on the main valve body 15 through a left oil duct, communicated with the main valve upper cavity through a middle oil duct, and communicated with the one-way valve cavity through a right oil duct. The main valve body 15 includes a main valve chamber and an outlet for an unloader valve. The outlet of the unloading valve is communicated with the oil tank to unload the pump, and the lower cavity of the main valve is communicated with the front cavity of the one-way valve. The check valve body 13 includes a check valve cavity, an inlet of the unloader valve and a control port of the unloader valve. The inlet of the unloading valve is connected with the outlet of the pump, so that the emulsion enters the unloading valve, and the control port of the unloading valve is connected with the pump station system. The front cavity of the one-way valve is communicated with the inlet of the unloading valve, and the rear cavity of the one-way valve is communicated with the control port of the unloading valve.
As shown in fig. 1 and 2, the pilot valve includes a pilot valve spool 6, a pilot valve spring 5, a pilot valve spring seat 4, a pilot valve seat 20, a pilot valve end cover 1, a push rod 19, a plug 18, and a pressure regulating screw 2. The plug 18 is screwed into the pilot valve body 3 through threads, and has a certain limiting effect on the ejector rod 19. The pilot valve seat 20 is screwed into the pilot valve body 3 to guide the rod 19. The ejector rod 19 moves in the pilot valve seat 20, and the ejector rod 19 can push the pilot valve spool 6 to move in the inner cavity of the pilot valve body 3 and can be abutted against or separated from the pilot valve spool 6. One end of the pilot valve core 6 is matched with the pilot valve seat 20, and the other end is abutted against the pilot valve spring 5. One end of the pilot valve spring 5 abuts against the pilot valve core 6, and the other end abuts against the pilot valve spring seat 4 to generate pressing force. One end of the pilot valve spring seat 4 abuts against the pilot valve end cover 1, and the other end abuts against the pilot valve spring 5, and the pilot valve spring 5 is guided. The pilot valve end cover 1 is fixed on the pilot valve body 3 through four screws, and one end of the pilot valve end cover abuts against the pilot valve body 3. The pressure regulating screw rod 2 is screwed into the pilot valve end cover 1 through threads, one end of the pressure regulating screw rod is abutted to the pilot valve spring seat 4, and the opening pressure of the set pilot valve can be regulated by rotating the pressure regulating screw rod 2.
The main valve comprises a main valve spool 17, a main valve spring 9, a main valve sleeve 7 and a main valve seat 16. The main valve seat 16 has one end abutting against the main valve body 15 and the other end abutting against the labyrinth block assembly 8. One end of the main valve sleeve 7 is abutted against the labyrinth block component 8, and the other end is abutted against the pilot valve body 3 to provide a guiding function for the main valve spool 17. One end of the main valve core 17 is matched with the main valve seat 16, and the other end is limited by the pilot valve body 3. One end of the main valve spring 9 is abutted against the main valve spool 17, and the other end is abutted against the pilot valve body 3 to generate pressing force.
The check valve comprises a check valve core 12, a check valve seat 14, a check valve spring 11 and a check valve end cover 10. The check valve seat 14 is installed in the check valve body 13 by interference fit. The valve core 12 of the one-way valve is matched with the valve seat 14 of the one-way valve at one end, and the other end is limited by the end cover 10 of the one-way valve. One end of the one-way valve spring 11 is abutted against the one-way valve core 12, and the other end is abutted against the one-way valve end cover 10 to generate pressing force. The one-way valve end cover 10 is fixed on the one-way valve body 13 through four screws, and one end of the one-way valve end cover is abutted against the one-way valve body 13.
As shown in fig. 2, the labyrinth block assembly 8 includes a labyrinth upper end cover 8.1, a labyrinth piece one 8.2, a labyrinth piece two 8.3, a labyrinth piece baffle 8.4 and a labyrinth piece lower end cover 8.5. In order to enhance the overall strength of the labyrinth block assembly 8, the labyrinth block assembly 8 is manufactured as a single body by brazing. The labyrinth block assembly 8 is installed outside the main valve core 17, one end of which is against the main valve seat 16, and the other end is against the main valve sleeve 7. One end of the labyrinth plate upper end cover 8.1 is propped against the main valve sleeve 7, and the other end is propped against the pressure reducing block. One end of the labyrinth piece lower end cover 8.5 is propped against the pressure reducing block, and the other end is propped against the main valve seat 16. The end cover of the labyrinth plate has higher strength and plays a role in connecting the labyrinth plate and increasing the strength of the labyrinth block. A plurality of decompression blocks are arranged between the upper end cover 8.1 of the labyrinth plate and the lower end cover 8.5 of the labyrinth plate in an overlapping manner. Each group of pressure reducing blocks respectively comprises from top to bottom: labyrinth piece baffle 8.4, labyrinth piece one 8.2, labyrinth piece two 8.3, labyrinth piece one 8.2, labyrinth piece baffle 8.4. In order to simplify the integral installation structure of the labyrinth block assembly 8, two adjacent groups of decompression blocks share one labyrinth plate baffle 8.4. Wherein the labyrinth plate upper end cover 8.1 is an upper labyrinth plate baffle 8.4 of the uppermost decompression block, and the labyrinth plate lower end cover 8.5 is a lower labyrinth plate baffle 8.4 of the lowermost decompression block.
Fig. 3 is a functional schematic diagram of an ultrahigh-pressure large-flow high-water-base unloading valve, wherein a port P is connected with an emulsion pump 22, a port A is connected with a system, and a port T is connected with an oil tank 21 during operation. When the system pressure is lower than the set pressure, the pilot valve 26 has a smaller opening amount, the main valve 25 is closed, the emulsion pump 22 supplies oil to the system through the one-way valve 23, and the energy accumulator 24 is charged; when the system pressure reaches the set pressure, the main valve 25 is opened, the ejector rod 19 moves left under the action of pressure difference, and further pushes away the pilot valve 26, so that the main valve 25 is completely opened, the emulsion returns to the oil tank 21 through the T port, the emulsion pump 22 starts unloading, meanwhile, the one-way valve 23 is closed, and the system pressure is maintained by the energy accumulator 24; when the system pressure is reduced to a certain value, the pilot valve 26 is closed, so that the main valve 25 is closed, the one-way valve 23 is opened again, the emulsion pump 22 loads the system again, and the energy accumulator 24 charges the system again, so that the functions of automatic unloading and automatic loading of the emulsion pump 22 are realized.
In a working state, emulsion flows in from an inlet of the unloading valve, one part of the emulsion opens the one-way valve 23, enters the rear end of the ejector rod 19 through an oil duct, and flows to a control port of the unloading valve through a small hole on the valve core 12 of the one-way valve and enters a pump station system; the other part enters the front end of the mandril 19 through a damping hole and an oil passage on the main valve core 17. When the system pressure is small enough not to open the pilot valve 26, the rod 19 is pushed to the right side of the pilot valve body 3 due to the resistance loss when passing through the check valve 23, and thus does not contact the pilot valve spool 6. When the system pressure rises to be slightly larger than the opening pressure of the pilot valve, the pilot valve has a smaller opening amount, the emulsion overflows from the outlet of the unloading valve through the oil channel, and the ejector rod 19 is still positioned on the right side of the pilot valve body 3 at the moment. When the pressure in the system reaches the set pressure, the opening amount of the pilot valve is increased, the ejector rod 19 moves left under the action of pressure difference to further push the pilot valve 26 open, at the moment, the valve core 17 of the main valve is opened, the emulsion flows to the oil tank through the outlet of the unloading valve, and the pump starts unloading. Meanwhile, the one-way valve 23 is closed to prevent the pressure oil of the pump station system from flowing backwards, and the energy accumulator maintains the pressure of the pump station system at the moment.
When the pressure of the pump station system is reduced to a certain value, the pilot valve 26 is closed, so that the main valve 25 is closed, and the pump loads the pump station system again, thereby realizing the unloading or loading of the automatic control pump.
When the pump is used for unloading, the pressure and the flow speed of the emulsion are reduced after passing through the labyrinth block assembly 8, so that the influence of cavitation erosion and erosion on the main valve 25 is greatly reduced, and the service life of the unloading valve is prolonged.
The main features and innovation of the present invention are described above, and the above-described embodiment is only one embodiment of the present invention, and does not include all embodiments. Based on the embodiments of the present invention, those skilled in the art can obtain other embodiments without inventive efforts, which belong to the protection scope of the present invention.
Claims (5)
1. The utility model provides an unloading valve of big flow high water base of superhigh pressure which characterized in that: the pilot valve comprises a main valve body (15), wherein one side of the main valve body (15) is connected with a pilot valve body (3) in a matching way, and the other side of the main valve body (15) is connected with a one-way valve body (13) in a matching way;
the pilot valve body (3) is provided with a pilot valve cavity, a left oil duct of the pilot valve cavity is communicated with an outlet of an unloading valve of the main valve body (15), a middle oil duct of the pilot valve cavity is communicated with an upper cavity of the main valve body (15), and a right oil duct of the pilot valve cavity is communicated with a one-way valve cavity of the one-way valve body (13);
set up main valve barrel (7) in the epicoele of main valve body (15), main valve barrel (7) upper end is supported and is leaned on and contact pilot valve body (3), and main valve barrel (7) lower extreme sets up labyrinth block subassembly (8), and labyrinth block subassembly (8) support on main valve disk seat (16), main valve disk seat (16) are installed on main valve body (15), and the main part of labyrinth block subassembly (8) is arranged in the unloading valve outlet of main valve body (15).
2. The unloading valve with ultrahigh pressure, high flow and high water base of claim 1, characterized in that: the right side oil duct of the pilot valve body (3) is communicated with the one-way valve cavity of the one-way valve body (13) through the oil duct of the main valve body (15).
3. The unloading valve with ultrahigh pressure, high flow and high water base of claim 1, characterized in that: the pilot valve body (3) is including setting up in pilot valve case (6), pilot valve spring holder (4) of its inner chamber, set up pilot valve spring (5) between pilot valve case (6) and pilot valve spring holder (4), the terminal surface fastening pilot valve end cover (1) of pilot valve body (3), threaded connection pressure regulating bolt (2) is gone up in pilot valve end cover (1) in order to carry out corresponding axial regulation along pilot valve body (3) to pilot valve spring holder (4), the inner chamber of pilot valve body (3) still is provided with pilot valve disk seat (20), and the hole of pilot valve disk seat (20) sets up ejector pin (19), and ejector pin (19) can promote pilot valve case (6) and remove in the inner chamber of preceding pilot valve body (3), set up plug (18) with the relative one end of pressure regulating bolt (2) on pilot valve body (3).
4. The unloading valve with ultrahigh pressure, high flow and high water base of claim 1, characterized in that: the check valve is characterized in that the check valve body (13) comprises a check valve core (12), a check valve seat (14), a check valve spring (11) and a check valve end cover (10), the check valve seat (14) is installed in the check valve body (13) in an interference fit mode, one end of the check valve core (12) is matched with the check valve seat (14), the other end of the check valve seat is limited through the check valve end cover (10), one end of the check valve spring (11) is tightly pressed on the check valve core (12), and the other end of the check valve spring is tightly pressed on the check valve end cover (10).
5. The unloading valve with ultrahigh pressure, high flow and high water base of claim 1, characterized in that: the labyrinth block component (8) comprises a labyrinth piece upper end cover (8.1), a labyrinth piece I (8.2), a labyrinth piece II (8.3), a labyrinth piece baffle plate (8.4) and a labyrinth piece lower end cover (8.5) which are arranged from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922501702.9U CN211501147U (en) | 2019-12-31 | 2019-12-31 | Ultrahigh-pressure large-flow high-water-base unloading valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922501702.9U CN211501147U (en) | 2019-12-31 | 2019-12-31 | Ultrahigh-pressure large-flow high-water-base unloading valve |
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| CN211501147U true CN211501147U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922501702.9U Active CN211501147U (en) | 2019-12-31 | 2019-12-31 | Ultrahigh-pressure large-flow high-water-base unloading valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005906A (en) * | 2019-12-31 | 2020-04-14 | 华中科技大学无锡研究院 | Ultrahigh-pressure large-flow high-water-base unloading valve |
| CN114087249A (en) * | 2021-11-18 | 2022-02-25 | 国能神东煤炭集团有限责任公司 | Electro-hydraulic pressure control system and control method |
| CN114412868A (en) * | 2022-01-24 | 2022-04-29 | 华中科技大学 | Proportional unloading valve of high-pressure large-flow liquid pump |
-
2019
- 2019-12-31 CN CN201922501702.9U patent/CN211501147U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005906A (en) * | 2019-12-31 | 2020-04-14 | 华中科技大学无锡研究院 | Ultrahigh-pressure large-flow high-water-base unloading valve |
| CN114087249A (en) * | 2021-11-18 | 2022-02-25 | 国能神东煤炭集团有限责任公司 | Electro-hydraulic pressure control system and control method |
| CN114087249B (en) * | 2021-11-18 | 2023-05-26 | 国能神东煤炭集团有限责任公司 | Electrohydraulic pressure control system and control method |
| CN114412868A (en) * | 2022-01-24 | 2022-04-29 | 华中科技大学 | Proportional unloading valve of high-pressure large-flow liquid pump |
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