Hydraulic support rapid liquid supplement system

Abstract

The application discloses a hydraulic support quick liquid supplement system, which comprises a pump station, a liquid supply pipe, a liquid return pipe, a hydraulic support and a liquid supplement device, wherein the liquid supplement device comprises a first accumulator group, a check valve, a cartridge valve and a control system; the hydraulic support quick liquid supplement system of the embodiment of the application utilizes the cartridge valve to quickly return the emulsified liquid stored in the first accumulator group to the liquid supply pipe in advance, so that the pressure of the liquid supply pipe is quickly compensated, and the response speed is fast; in addition, the above-mentioned mode does not need to frequently adjust the rotating speed of the pump station, and is favorable for prolonging the service life of the pump station; and the hydraulic support quick liquid supplement system of the embodiment of the application has the advantages of fast response speed and long service life.

Description

Technical Field

[0001] This invention relates to the field of mining support equipment manufacturing technology, specifically to a rapid fluid replenishment system for hydraulic supports. Background Technology

[0002] During the mining process of a fully mechanized longwall face, high-speed cutting by the coal mining machine, rapid movement of hydraulic supports following the machine, and large-volume coal transport are the foundation for achieving high production and efficiency in the mine. Among these, the rapid following of the hydraulic supports places higher demands on the hydraulic supply pipes, especially when multiple hydraulic supports operate simultaneously. This can cause a drop in pressure in the hydraulic supply pipes and insufficient flow, preventing the hydraulic supports from completing the movement within the programmed time.

[0003] In related technologies, when the pressure in the supply pipe drops to the set value, the pump station's speed is increased to increase the instantaneous flow rate and compensate for the pressure in the supply pipe, mainly through methods such as frequency conversion speed regulation. However, since it takes a certain amount of time for the pump station to increase its speed, the response speed is relatively slow; in addition, frequent adjustments to the pump station's speed also have a certain impact on the pump station's lifespan. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a rapid fluid replenishment system for hydraulic supports that offers fast response and long service life.

[0005] The hydraulic support rapid fluid replenishment system of this invention includes a pump station, a supply pipe, a return pipe, a hydraulic support, a fluid replenishment device, and a control system. The hydraulic support is connected to the pump station through the supply pipe and the return pipe. The fluid replenishment device includes a first accumulator group, a one-way valve, a cartridge valve, and a control system. The one-way valve has a first inlet and a first outlet. The first inlet is connected to the supply pipe, and the first outlet is connected to the first accumulator group.

[0006] The cartridge valve has a second inlet and a second outlet. The second inlet is connected to the first accumulator group, and the second outlet is connected to the supply pipe. The control system is used to control the cartridge valve to switch between a first state and a second state.

[0007] When the pressure at the second inlet is greater than or equal to the first preset value P1, and the pressure at the second outlet is less than or equal to the second preset value P2, the cartridge valve is in the first state, and the second inlet and the second outlet are connected, wherein the first preset value P1 is greater than the first preset value P2.

[0008] When the pressure at the second inlet is less than the first preset value P1, and / or the pressure at the second outlet is greater than the second preset value P2, the cartridge valve is in the second state, and the second inlet is disconnected from the second outlet.

[0009] In some embodiments, the first preset value P1 is greater than or equal to 25 MPa, and the second preset value P2 is less than or equal to 18 MPa.

[0010] In some embodiments, the control system includes a first pressure sensor, a second pressure sensor, and an electro-hydraulic control valve. The first pressure sensor is located between the first accumulator group and the second inlet, and the second pressure sensor is located between the second outlet and the supply pipe.

[0011] Both the first pressure sensor and the second pressure sensor are connected to the electro-hydraulic control valve via signal connection.

[0012] The cartridge valve is in the first state when the detection value of the first pressure sensor is greater than or equal to the first preset value P1 and the detection value of the second pressure sensor is less than or equal to the second preset value P2; the cartridge valve is in the second state when the detection value of the first pressure sensor is less than the first preset value P1 and / or the detection value of the second pressure sensor is greater than the second preset value P2.

[0013] In some embodiments, the electro-hydraulic control valve has a working port, a third inlet port, and a third outlet port, and the cartridge valve also has a control port. The working port is connected to the control port. In the first state, the working port is connected to the third outlet port, and in the second state, the working port is connected to the third inlet port.

[0014] In some embodiments, the third liquid inlet is connected to the first accumulator group, and the third liquid outlet is connected to the return pipe.

[0015] In some embodiments, each of the liquid supply pipe and the liquid return pipe is provided with one, and the plurality of liquid supply pipes and the plurality of liquid return pipes correspond one-to-one, and each liquid supply pipe is provided with at least one of the liquid replenishment devices.

[0016] In some embodiments, the hydraulic support rapid fluid replenishment system of the present invention further includes a second accumulator group, which is connected to the fluid supply pipe.

[0017] In some embodiments, the hydraulic support rapid fluid replenishment system of the present invention further includes a filter, which is disposed on the fluid supply pipe.

[0018] In some embodiments, the electro-hydraulic control valve is a two-position three-way solenoid valve.

[0019] In some embodiments, the cartridge valve is a two-way cartridge valve.

[0020] Compared with related technologies that increase the pump station speed to compensate for the fluid supply pipe, the hydraulic support rapid fluid replenishment system of this embodiment utilizes a cartridge valve to quickly return the emulsion stored in the first accumulator group to the fluid supply pipe, thereby rapidly compensating for the pressure in the fluid supply pipe and providing a fast response. In addition, by adopting the above method, it is not necessary to frequently adjust the pump station speed, which is beneficial to improving the service life of the pump station and thus improving the hydraulic support rapid fluid replenishment system of this embodiment.

[0021] Therefore, the hydraulic support rapid fluid replenishment system of the present invention has the advantages of fast response speed and long service life. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the rapid fluid replenishment system for hydraulic supports according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the hydraulic support with multiple supply pipes and multiple return pipes according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the fluid replenishment device of the hydraulic support rapid fluid replenishment system according to an embodiment of the present invention.

[0025] Figure label:

[0026] Hydraulic support rapid fluid replenishment system 100;

[0027] Pumping station 1;

[0028] Liquid supply pipe 2;

[0029] Return pipe 3;

[0030] Hydraulic support 4;

[0031] Liquid replenishment device 5; first accumulator group 501; one-way valve 502; first liquid inlet 5021; first liquid outlet 5022; cartridge valve 503; second liquid inlet 5031; second liquid outlet 5032; control port 5033; first pressure sensor 504; second pressure sensor 505; electro-hydraulic control valve 506; working port 5061; third liquid inlet 5062; third liquid outlet 5063;

[0032] Second accumulator group 6;

[0033] Filter 7. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] The technical solution of this application will now be described in detail with reference to the accompanying drawings.

[0036] like Figures 1 to 3 As shown, the hydraulic support rapid fluid replenishment system 100 of this embodiment includes a pump station 1, a supply pipe 2, a return pipe 3, a hydraulic support 4, a fluid replenishment device 5, and a control system. The hydraulic support 4 is connected to the pump station 1 through the supply pipe 2 and the return pipe 3.

[0037] The liquid replenishment device 5 includes a first accumulator group 501, a one-way valve 502, a cartridge valve 503, and a control system. The one-way valve 502 has a first liquid inlet 5021 and a first liquid outlet 5022. The first liquid inlet 5021 is connected to the liquid supply pipe 2, and the first liquid outlet 5022 is connected to the first accumulator group 501. The first accumulator group 501 includes multiple accumulators, and the multiple accumulators are connected to each other.

[0038] The control system controls the cartridge valve 503 to switch between a first state and a second state. When the pressure at the second inlet 5031 is greater than or equal to a first preset value P1, and the pressure at the second outlet 5032 is less than or equal to a second preset value P2, the cartridge valve 503 is in the first state, and the second inlet 5031 and the second outlet 5032 are connected. When the pressure at the second inlet 5031 is less than the first preset value P1, and / or the pressure at the second outlet 5032 is greater than the second preset value P2, the cartridge valve 503 is in the second state, and the second inlet 5031 and the second outlet 5032 are disconnected, wherein the first preset value P1 is greater than the second preset value P2.

[0039] When the pressure at the second inlet 5031 is less than the first preset value P1, and / or the pressure at the second outlet 5032 is greater than the second preset value P2, it can be understood that if at least one of the requirements of the pressure at the second inlet 5031 being less than the first preset value P1 and the pressure at the second outlet 5032 being greater than the second preset value P2 is met, the control system will control the cartridge valve 503 to be in the second state.

[0040] The hydraulic support rapid fluid replenishment system 100 of this invention operates in three stages: the fluid filling stage, the stabilization stage, and the fluid replenishment stage.

[0041] During the filling stage, the hydraulic support 4 does not require emulsion with high pressure and flow rate. The emulsion in the supply pipe 2 will flow into the check valve 502 through the first inlet 5021 and into the first accumulator group 501 through the first outlet 5022 for energy storage. At this time, the control system controls the cartridge valve 503 to be in the second state, and the second inlet 5031 and the second outlet 5032 are disconnected. The emulsion stored in the first accumulator group 501 will not flow back through the cartridge valve 503.

[0042] During the stabilization phase, the pressure at the first inlet 5021 and the first outlet 5022 reaches equilibrium, and the supply pipe 2 will stop filling the first accumulator group 501 with liquid.

[0043] During the replenishment phase, when the pressure at the second inlet 5031 is greater than or equal to the first preset value P1 and the pressure at the second outlet 5032 is less than or equal to the second preset value P2, and the pressure in the supply pipe 2 drops and replenishment is needed, the control system controls the cartridge valve 503 to be in the first state, and the second inlet 5031 and the second outlet 5032 are connected. The emulsion stored in the first accumulator group 501 during the filling phase enters the cartridge valve 503 through the second inlet 5031 and enters the supply pipe 2 through the second outlet 5032.

[0044] It is understandable that the flow rate of the cartridge valve 503 can reach 1000L / min and the diameter can reach 200-250mm. By utilizing this characteristic of the cartridge valve 503, the emulsion stored in the first accumulator group 501 can quickly enter the supply pipe 2 to compensate for the supply pressure of the supply pipe 2. The emulsion entering the supply pipe 2 from the first accumulator group 501 merges with the discharge from the pump station 1 to quickly establish pressure balance.

[0045] Therefore, compared with the related technology of increasing the speed of pump station 1 to compensate for the liquid supply pipe 2, the hydraulic support rapid liquid replenishment system 100 of the present invention uses cartridge valve 503 to quickly return the emulsion stored in the first accumulator group 501 to the liquid supply pipe 2 to quickly compensate for the liquid supply pipe 2, and the response speed is fast. In addition, by adopting the above method, it is not necessary to frequently adjust the speed of pump station 1, which is conducive to improving the service life of pump station 1, and thus conducive to improving the service life of hydraulic support rapid liquid replenishment system 100 of the present invention.

[0046] Therefore, the hydraulic support rapid fluid replenishment system 100 of this invention has advantages such as fast response speed and long service life.

[0047] In some embodiments, the first preset value P1 is greater than or equal to 25 MPa, and the second preset value P2 is less than or equal to 18 MPa.

[0048] It is understandable that the rated pressure provided by pump station 1 is generally 31.5 MPa. Setting P2 to less than or equal to 18 MPa, which is far less than 31.5 MPa, indicates that the pressure in the liquid supply pipe 2 has dropped to an insufficient level. At this point, the first accumulator group 501 needs to compensate for the liquid supply pipe 2. Setting the first preset value P1 to greater than or equal to 25 MPa ensures that the first accumulator group 501 has sufficient pressure of emulsion to replenish the liquid supply pipe 2.

[0049] Therefore, by setting the first preset value P1 to be greater than or equal to 25MPa and the second preset value P2 to be less than or equal to 18MPa, when the pressure in the supply pipe 2 drops by a certain range, there is enough emulsion with sufficient pressure in the first accumulator group 501 to compensate for the supply pipe 2, which is beneficial to improving the working reliability of the hydraulic support rapid fluid replenishment system 100 of this embodiment of the invention.

[0050] In some embodiments, the control system includes a first pressure sensor 504, a second pressure sensor 505, and an electro-hydraulic control valve 506. The first pressure sensor 504 is located between the first accumulator group 501 and the second inlet 5031, and the second pressure sensor 505 is located between the second outlet 5032 and the supply pipe 2. Both the first pressure sensor 504 and the second pressure sensor 505 are signal-connected to the electro-hydraulic control valve 506.

[0051] The electro-hydraulic control valve 506 has a working port 5061, a third inlet port 5062 and a third outlet port 5063. The cartridge valve 503 also has a control port 5033. The working port 5061 is connected to the control port 5033. In the first state, the working port 5061 is connected to the third outlet port 5063. In the second state, the working port 5061 is connected to the third inlet port 5062.

[0052] When the detection value of the first pressure sensor 504 is greater than or equal to the first preset value P1, and the detection value of the second pressure sensor 505 is less than or equal to the second preset value P2, the cartridge valve 503 is in the first state; when the detection value of the first pressure sensor 504 is less than the first preset value P1, and / or the detection value of the second pressure sensor 505 is greater than the second preset value P2, the cartridge valve 503 is in the second state.

[0053] For example, the electro-hydraulic control valve 506 includes a solenoid pilot valve and a main valve. A working port 5061, a third inlet port 5062, and a third outlet port 5063 are located on the main valve. A first pressure sensor 504 and a second pressure sensor 505 are connected to the solenoid pilot valve via a PLC signal. The first pressure sensor 504 is used to detect the emulsion pressure at the second inlet port 5031, and the second pressure sensor 505 is used to detect the emulsion pressure at the second outlet port 5032.

[0054] The first pressure sensor 504 and the second pressure sensor 505 transmit the detected value signals to the PLC. The PLC judges the detected values ​​of the first pressure sensor 504 and the second pressure sensor 505. When it is determined that the detected value of the first pressure sensor 504 is greater than or equal to the first preset value P1, and the detected value of the second pressure sensor 505 is less than or equal to the second preset value P2, the PLC controls the solenoid pilot valve of the electro-hydraulic control valve 506 to be in a de-energized state. The working port 5061 of the main valve is connected to the third outlet port 5063, causing the control port 5033 of the cartridge valve 503 to lose pressure. The valve core of the cartridge valve 503 is opened, and the second inlet port 5031 and the second outlet port 5032 of the cartridge valve 503 are connected. The emulsion in the first accumulator group 501 enters the supply pipe 2 through the cartridge valve 503 for compensation.

[0055] Therefore, the hydraulic support rapid fluid replenishment system 100 of this embodiment of the invention is convenient to control by setting an electro-hydraulic control valve 506 in the control system and adjusting it based on the pressure difference between the second inlet 5031 and the second outlet 5032 of the cartridge valve 503. The triggering condition can be flexibly set according to the actual situation of the fully mechanized mining face.

[0056] In some embodiments, the third liquid inlet 5062 is connected to the first accumulator group 501, and the third liquid outlet 5063 is connected to the return pipe 3.

[0057] like Figure 3 As shown, it can be understood that the cartridge valve 503 will only disconnect when the oil pressure at control port 5033 is greater than the oil pressure at the third inlet port 5062, and will only connect when the oil pressure at control port 5033 is less than the oil pressure at the third inlet port 5062. The third inlet port 5062 is connected to the first accumulator group 501, and the third outlet port 5063 is connected to the return pipe 3. That is, when the solenoid pilot valve is energized, the third inlet port 5062 is connected to the working port 5061, and the working port 5061 is connected to the control port 5033. The oil pressure at control port 5033 is always equal to the oil pressure at the second inlet port 5031. However, because the valve core of the cartridge valve 503 also has spring force, the valve core of the cartridge valve 503 will be in the closed state, and the cartridge valve 503 will be in the disconnected state. When the solenoid pilot valve is de-energized, the working port 5061 is connected to the third return port 5063, the control port 5033 loses pressure, the valve core of the cartridge valve 503 will be in the open state, the second inlet port 5031 is connected to the second outlet port 5032, and the cartridge valve 503 is in the open state.

[0058] Therefore, the third inlet 5062 of the electro-hydraulic control valve 506 is connected to the first accumulator group 501, so that the first accumulator group 501 provides control fluid to the electro-hydraulic control valve 506. There is no need to set a separate control fluid of a certain pressure to control the electro-hydraulic control valve 506 separately, thus making the hydraulic support rapid fluid replenishment system 100 of the present invention simple in structure and low in manufacturing cost.

[0059] In some embodiments, each of the liquid supply pipe 2 and the liquid return pipe 3 has a plurality of liquid supply pipes 2 and a plurality of liquid return pipes 3 corresponding one to one, and each liquid supply pipe 2 is provided with at least one liquid replenishment device 5.

[0060] For example, such as Figure 2 As shown, there are two supply pipes 2 and two return pipes 3, with a replenishment device 5 installed on each supply pipe 2. Of course, the supply pipes 2 and return pipes 3 are configured in a three-in-three-out configuration, and the specific number can be reasonably set according to requirements.

[0061] During use, when the pressure in the supply pipe 2 decreases, each replenishment device 5 is activated sequentially at certain time intervals. This helps to reduce the impact of a large flow rate on the supply pipe 2, thereby improving the safety of the hydraulic support rapid replenishment system 100 in this embodiment of the invention.

[0062] In some embodiments, the hydraulic support rapid fluid replenishment system 100 of the present invention further includes a second accumulator group 6, which is connected to the fluid supply pipe 2.

[0063] For example, such as Figure 1 As shown, during the replenishment phase, the first accumulator is used to quickly compensate for the pressure in the supply pipe 2 and increase the pressure. The second accumulator group 6 can absorb the impact generated by the first accumulator during the replenishment process and is used to stabilize the pressure in the supply pipe 2 to reduce pressure fluctuations. The two work together to improve the operational reliability of the hydraulic support rapid replenishment system 100 of this embodiment of the invention.

[0064] In some embodiments, the hydraulic support rapid fluid replenishment system 100 of the present invention further includes a filter 7, which is disposed on the fluid supply pipe 2 to filter the emulsion entering the hydraulic support 4, preventing impurities in the emulsion from entering the hydraulic support 4 and affecting the normal operation of the hydraulic support 4, thereby further improving the operational reliability of the hydraulic support rapid fluid replenishment system 100 of the present invention.

[0065] Optionally, the electro-hydraulic control valve 506 is a two-position three-way solenoid valve.

[0066] Optionally, the cartridge valve 503 is a two-way cartridge valve 503.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A rapid fluid replenishment system for a hydraulic support, characterized in that, include: The pump station, the supply pipe, the return pipe, and the hydraulic support are connected to the pump station through the supply pipe and the return pipe. as well as A liquid replenishment device, comprising a first accumulator group, a one-way valve, a cartridge valve, and a control system, wherein the one-way valve has a first inlet and a first outlet, the first inlet being connected to the liquid supply pipe, and the first outlet being connected to the first accumulator group; The cartridge valve has a second inlet and a second outlet. The second inlet is connected to the first accumulator group, and the second outlet is connected to the supply pipe. The control system is used to control the cartridge valve to switch between a first state and a second state. When the pressure at the second inlet is greater than or equal to the first preset value P1 and the pressure at the second outlet is less than or equal to the second preset value P2, the cartridge valve is in the first state, and the second inlet and the second outlet are connected, wherein the first preset value P1 is greater than the second preset value P2. When the pressure at the second inlet is less than the first preset value P1, and / or the pressure at the second outlet is greater than the second preset value P2, the cartridge valve is in the second state, and the second inlet is disconnected from the second outlet; the first preset value P1 is greater than or equal to 25 MPa, and the second preset value P2 is less than or equal to 18 MPa; The control system includes: A first pressure sensor and a second pressure sensor, wherein the first pressure sensor is disposed between the first accumulator group and the second inlet, and the second pressure sensor is disposed between the second outlet and the supply pipe; and An electro-hydraulic control valve, wherein both the first pressure sensor and the second pressure sensor are signal-connected to the electro-hydraulic control valve; The electro-hydraulic control valve has a working port, a third inlet port, and a third outlet port. The cartridge valve also has a control port. The working port is connected to the control port. In the first state, the working port is connected to the third outlet port. In the second state, the working port is connected to the third inlet port. The third inlet port is connected to the first accumulator group. The third outlet port is connected to the return pipe.

2. The rapid fluid replenishment system for hydraulic supports according to claim 1, characterized in that, The cartridge valve is in the first state when the detection value of the first pressure sensor is greater than or equal to the first preset value P1 and the detection value of the second pressure sensor is less than or equal to the second preset value P2; the cartridge valve is in the second state when the detection value of the first pressure sensor is less than the first preset value P1 and / or the detection value of the second pressure sensor is greater than the second preset value P2.

3. The rapid fluid replenishment system for hydraulic supports according to claim 1, characterized in that, The liquid supply pipe and the liquid return pipe are each provided in a certain number, and the multiple liquid supply pipes and the multiple liquid return pipes correspond one-to-one. Each liquid supply pipe is provided with at least one liquid replenishment device.

4. The rapid fluid replenishment system for hydraulic supports according to claim 1, characterized in that, It also includes a second accumulator group, which is connected to the liquid supply pipe.

5. The rapid fluid replenishment system for hydraulic supports according to claim 1, characterized in that, It also includes a filter, which is disposed on the liquid supply pipe.

6. The rapid fluid replenishment system for hydraulic supports according to claim 2, characterized in that, The electro-hydraulic control valve is a two-position three-way solenoid valve.

7. The rapid fluid replenishment system for hydraulic supports according to claim 1, characterized in that, The cartridge valve is a two-way cartridge valve.

Images