Dual-mode control unloading valve

Abstract

The utility model relates to the technical field of unloading valves, and discloses a dual-mode control unloading valve which comprises a valve seat and a valve element, a moving channel is arranged in the valve seat, the valve element is arranged in the moving channel and is in sliding fit with the moving channel, the valve element comprises a fixing column, a sealing column and a sealing cone, the sealing column is arranged at the end of the fixing column, and the sealing cone is arranged on the sealing column. A scraping unit is arranged at the end, away from the fixing column, of the sealing column and attached to the inner wall of the moving channel. The sealing cone is arranged at the end, away from the fixing column, of the sealing column, the cone head of the sealing cone faces the position away from the sealing column, a plurality of liquid spraying holes are formed in the side wall of the sealing cone, and cleaning liquid is introduced into the liquid spraying holes. The valve seat has the effect of reducing impurities attached to the inner wall of the valve seat.

Description

Technical Field

[0001] The present application relates to the technical field of unloading valves, and in particular to a dual-mode controlled unloading valve. Background Art

[0002] An unloading valve is a commonly used automatic protection device in emulsion pumps. It automatically adjusts pressure based on the pump's operating status to prevent system overload. A dual-mode unloading valve, as a type of unloading valve, combines mechanical and electromagnetic control methods to provide more flexible and efficient control.

[0003] There is a Chinese patent with authorization announcement number CN209083534U that discloses an unloading valve for a large-displacement emulsion pump for mining, including a valve body, a valve seat and a valve core are arranged in the valve body, and a fluid channel, a cylindrical sealing hole, and a conical sealing hole are arranged on the valve seat; the cylindrical sealing hole is located between the fluid channel and the conical sealing hole; a cylindrical sealing body and a conical sealing body are arranged at the lower end of the valve core, the cylindrical sealing body cooperates to seal with the cylindrical sealing hole, and the conical sealing body cooperates to seal with the conical sealing hole; a plurality of positioning grooves are arranged on the lower end surface of the conical sealing body; a positioning bracket and a filter bracket are arranged in the valve seat; a plurality of positioning columns are arranged on the positioning bracket, which are plugged into and positioned corresponding to the positioning grooves; a filter screen is arranged on the filter bracket, and a rotating shaft is arranged in the vertical direction at the center of the filter bracket; the positioning bracket is located between the valve core and the filter bracket; and the rotating impeller is located below the filter bracket.

[0004] When the unloading valve for a large-displacement emulsion pump used in mining is in operation, impurities such as metal debris carried by the emulsion may adhere to the inner wall of the valve seat. This impurities may obstruct the valve core as it returns to its original position, preventing it from properly restoring. If the valve core cannot return smoothly, the unloading valve may not close properly, resulting in the emulsion pump being unable to build the required pressure after startup. Utility Model Content

[0005] In order to reduce impurities adhering to the inner wall of the valve seat, the present application provides a dual-mode control unloading valve.

[0006] The present application provides a dual-mode control unloading valve adopting the following technical solution:

[0007] A dual-mode controlled unloading valve includes a valve seat and a valve core. A movable channel is provided inside the valve seat. The valve core is placed inside the movable channel and slidably cooperates with the movable channel. The valve core includes a fixed column, a sealing column, and a sealing cone, wherein:

[0008] The sealing column is installed at the end of the fixed column, and a scraping unit is provided at one end of the sealing column away from the fixed column, and the scraping unit is in contact with the inner wall of the moving channel;

[0009] The sealing cone is installed at one end of the sealing column away from the fixed column, and the cone head of the sealing cone faces a position away from the sealing column. The side wall of the sealing cone is provided with a plurality of spray holes, and cleaning liquid is passed into the spray holes.

[0010] Optionally, a diverter groove is provided at the cone head of the sealing cone, a diverter unit is provided inside the diverter groove, and the liquid inlet of the liquid spray hole is connected to the diverter groove.

[0011] Optionally, the side wall of the sealing cone is provided with an annular guide groove circumferentially along the axial direction of the sealing cone, the inner wall of the guide groove is arranged in an arc surface, and the liquid inlet of the liquid spray hole is located on the groove wall of the guide groove.

[0012] Optionally, the liquid outlets of the plurality of liquid spray holes are circumferentially distributed along the axial direction of the sealing cone.

[0013] Optionally, the scraping unit is a scraping ring, the scraping ring is coaxial with the sealing column, and the outer ring wall of the scraping ring is in contact with the inner wall of the moving channel.

[0014] Optionally, the diameter of the inner wall of the scraper ring gradually increases in the direction from approaching the sealing column to the sealing cone, and the inner wall of the scraper ring and the groove wall of the guide groove are transitioned through an arc surface.

[0015] Optionally, the diversion unit includes a mounting ring, a filter screen and a diversion plate, wherein:

[0016] The mounting ring is threadedly connected to the inner wall of the diversion groove;

[0017] The filter is mounted on the mounting ring;

[0018] The diverter plate is installed on one side of the filter screen close to the inner wall of the diverter groove. There are a plurality of diverter plates, and the plurality of diverter plates are circumferentially distributed along the axial direction of the mounting ring.

[0019] Optionally, a shift rod is provided at one end of the mounting ring away from the sealing column, and when the shift rod contacts the notch of the diverter groove, the diverter plate contacts the groove wall of the diverter groove.

[0020] Optionally, the inner wall of the diversion groove is arranged in an arc surface.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. When the valve core returns to its seat, it drives the scraping unit to move synchronously. During this movement, the scraping unit scrapes away impurities attached to the inner wall of the moving channel. As the valve core returns, cleaning fluid is sprayed from the spray hole onto the inner wall of the moving channel, flushing away any impurities attached to the inner wall. This further reduces the amount of impurities on the inner wall of the moving channel. The scraping unit scrapes away impurities, while the cleaning fluid flushes away impurities, thereby reducing the likelihood of impurities adhering to the inner wall of the moving channel. This reduces the likelihood of the valve core becoming stuck in the moving channel due to impurities attached to the inner wall of the moving channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the valve core structure in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram showing the relative positions of the diverter groove and the liquid spray hole in the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the diversion unit structure in the embodiment of the present application.

[0027] Description of reference numerals:

[0028] 1. Valve seat; 11. Moving channel; 2. Valve core; 21. Fixed column; 22. Sealing column; 23. Sealing cone; 231. Guide groove; 232. Spray hole; 233. Diverter groove; 24. Scraping unit; 25. Diverter unit; 251. Mounting ring; 252. Filter screen; 253. Diverter plate; 254. Push rod. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0030] The embodiment of the present application discloses a dual-mode control unloading valve.

[0031] A dual-mode controlled unloading valve includes a valve seat 1 and a valve core 2. A movable passage 11 is defined within the valve seat 1. The valve core 2 is positioned within the movable passage 11 and slidably engages therewith. The valve core 2 includes a fixed post 21, a sealing post 22, and a sealing cone 23. The sealing post 22 is fixedly mounted at the end of the fixed post 21. The sealing cone 23 is fixedly mounted at the end of the sealing post 22 away from the fixed post 21. The tip of the sealing cone 23 faces away from the sealing post 22. The fixed post 21, sealing post 22, and sealing cone 23 are coaxially arranged. When the valve core 2 is reset, the entire valve core 2 moves in the direction from the sealing post 22 to the sealing cone 23.

[0032] The end of the sealing column 22 away from the fixed column 21 is provided with a scraping unit 24, which is in contact with the inner wall of the moving channel 11. The side wall of the sealing cone 23 is provided with a plurality of spray holes 232, into which cleaning liquid is introduced.

[0033] When the valve core 2 returns to its original position within the valve seat 1, it drives the scraper unit 24 to move synchronously. During this movement, the scraper unit 24 scrapes impurities adhering to the inner wall of the movable channel 11. Simultaneously, cleaning fluid is sprayed from the spray hole 232 onto the inner wall of the movable channel 11, pre-flushing any impurities adhering thereto and further reducing the amount of impurities adhering thereto. The coordinated action of the scraper unit 24 scraping impurities and the cleaning fluid flushing impurities reduces the likelihood of impurities adhering to the inner wall of the movable channel 11, thereby reducing the risk of the valve core 2 becoming stuck in the movable channel 11 due to impurities adhering thereto.

[0034] An annular guide groove 231 is provided on the side wall of the sealing cone 23 along the axial direction of the sealing cone 23 . The inner wall of the guide groove 231 is arranged in an arc surface. The liquid inlet of the spray hole 232 is located on the groove wall of the guide groove 231 . A diversion groove 233 is provided at the cone head of the sealing cone 23 .

[0035] The outlets of the plurality of liquid spray holes 232 are all located on the groove wall of the guide groove 231 and are evenly distributed circumferentially along the axis of the guide groove 231. A diverter groove 233 is provided at the cone head of the sealing cone 23, and the liquid inlet of the liquid spray holes 232 is located on the inner wall of the diverter groove 233.

[0036] When the valve core 2 is reset, the emulsion inside the valve seat 1 flows into the diverter groove 233, enters the spray hole 232 from the diverter groove 233, and is sprayed from the outlet of the spray hole 232 to the inner wall of the movable channel 11, thereby flushing impurities attached to the inner wall of the movable channel 11.

[0037] The walls of the diverter groove 233 are curved, increasing the area of the diverter groove 233 and facilitating the location of the liquid inlets of the plurality of liquid spray holes 232 on the walls of the diverter groove 233. Furthermore, the walls of the guide groove 231 are curved, guiding the cleaning liquid after it is sprayed, so that the cleaning liquid is sprayed onto the inner wall of the moving channel 11.

[0038] A diverter unit 25 is provided inside the diverter trough 233, and the diverter unit 25 includes a mounting ring 251, a filter screen 252, and a diverter plate 253. The mounting ring 251 is threadedly connected to the inner wall of the diverter trough 233, and the filter screen 252 is fixedly mounted on the mounting ring 251. The filter screen 252 is arranged in an arc shape to increase the filtering area for the emulsion. The diverter plate 253 is fixedly mounted on the side of the filter screen 252 close to the inner wall of the diverter trough 233. There are several diverter plates 253, which are circumferentially distributed along the axis direction of the mounting ring 251. The structural strength of the filter screen 252 is improved by the diverter plates 253, and the gaps between the diverter plates 253 provide space for the deformation of the filter screen 252. At the same time, two adjacent diverter plates 253 form an emulsion flow channel to divert the filtered emulsion to the spray hole 232.

[0039] A lever 254 is fixedly mounted on the end of the mounting ring 251 away from the sealing post 22. When the lever 254 contacts the notch of the diverter groove 233, the diverter plate 253 contacts the wall of the diverter groove 233. The lever 254 drives the mounting ring 251 to rotate and positions the mounting ring 251. When the lever 254 contacts the notch of the diverter groove 233, the diverter plate 253 contacts the wall of the diverter groove 233.

[0040] The scraping unit 24 is a scraping ring, which is coaxial with the sealing column 22 and fixedly mounted thereon. The outer wall of the scraping ring is in contact with the inner wall of the moving channel 11. The diameter of the inner wall of the scraping ring gradually increases as it approaches the sealing column 22 toward the sealing cone 23, and the inner wall of the scraping ring transitions to the groove wall of the guide groove 231 through an arc surface.

[0041] When the valve core 2 is reset, the scraper ring removes impurities adhering to the inner wall of the movable channel 11 during its movement. The cleaned impurities are guided along the inner wall of the scraper ring and temporarily collected. Simultaneously, the cleaning liquid ejected from the liquid spray port is guided along the inner wall of the scraper ring onto the inner wall of the movable channel 11. During its flow, the cleaning liquid removes impurities temporarily deposited on the scraper ring, reducing the possibility of clogging of the liquid spray hole 232.

[0042] The implementation principle of a dual-mode control unloading valve in an embodiment of the present application is as follows: when the valve core 2 is reset, the emulsion inside the valve seat 1 is filtered by the filter mesh 252 and flows into the diverter groove 233. After being diverted by the diverter plate 253, it flows into the spray hole 232 from the liquid inlet of the spray hole 232 and is sprayed out from the liquid outlet of the spray hole 232. The sprayed emulsion is guided to the inner wall of the movable channel 11 through the groove wall of the guide groove 231 and the inner ring wall of the scraping ring, and the impurities attached to the inner wall of the movable channel 11 are flushed. At the same time, the outer ring wall of the scraping ring scrapes the inner wall of the movable channel 11, reducing the risk of impurities adhering to the inner wall of the movable channel 11 and causing the valve core 2 to reset and get stuck.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A dual-mode control unloading valve, comprising a valve seat and a valve core, wherein a movable channel is provided inside the valve seat, and the valve core is disposed inside the movable channel and slidably engages with the movable channel, characterized in that: The valve core includes a fixed column, a sealing column and a sealing cone, wherein: The sealing column is installed at the end of the fixed column, and a scraping unit is provided at one end of the sealing column away from the fixed column, and the scraping unit is in contact with the inner wall of the moving channel; The sealing cone is installed at one end of the sealing column away from the fixed column, and the cone head of the sealing cone faces a position away from the sealing column. The side wall of the sealing cone is provided with a plurality of spray holes, and cleaning liquid is passed into the spray holes.

2. A dual-mode control unloading valve according to claim 1, characterized in that: A diversion groove is provided at the cone head of the sealing cone, a diversion unit is provided inside the diversion groove, and the liquid inlet of the liquid spray hole is communicated with the diversion groove.

3. The dual-mode control unloading valve according to claim 1, characterized in that: The side wall of the sealing cone is provided with an annular guide groove circumferentially along the axial direction of the sealing cone. The inner wall of the guide groove is arranged in an arc surface, and the liquid inlet of the liquid injection hole is located on the groove wall of the guide groove.

4. A dual-mode control unloading valve according to claim 3, characterized in that: The liquid outlets of the plurality of liquid spray holes are distributed circumferentially along the axis direction of the sealing cone.

5. The dual-mode control unloading valve according to claim 3, characterized in that: The scraping unit is a scraping ring, the scraping ring is coaxial with the sealing column, and the outer ring wall of the scraping ring is in contact with the inner wall of the moving channel.

6. The dual-mode control unloading valve according to claim 5, characterized in that: The diameter of the inner wall of the scraper ring gradually increases in the direction from approaching the sealing column to the sealing cone, and the inner wall of the scraper ring and the groove wall of the guide groove are transitioned through an arc surface.

7. The dual-mode control unloading valve according to claim 2, characterized in that: The diversion unit includes a mounting ring, a filter screen and a diversion plate, wherein: The mounting ring is threadedly connected to the inner wall of the diversion groove; The filter is mounted on the mounting ring; The diverter plate is installed on one side of the filter screen close to the inner wall of the diverter groove. There are a plurality of diverter plates, and the plurality of diverter plates are circumferentially distributed along the axial direction of the mounting ring.

8. The dual-mode control unloading valve according to claim 7, characterized in that: A shift rod is provided at one end of the mounting ring away from the sealing column. When the shift rod contacts the notch of the diverter groove, the diverter plate contacts the groove wall of the diverter groove.

9. The dual-mode control unloading valve according to claim 7, characterized in that: The inner wall of the diversion groove is arranged in an arc surface.

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