Multi-pass quick-change water-saving valve and cabin scanning system

Abstract

The application discloses a kind of multi-passageway quick conversion water-saving valve and cabin cleaning system in the technical field of water-saving valve;The water-saving valve includes hollow valve body, gear disc and main shaft are arranged in valve body and are driven by servo motor, cooperate with multiple sealing rings and wear-resistant rings to form three dynamic sealing surfaces, realize the selective intermittent connection of eight water inlet pipes and four water outlet pipes, and it is switched quickly.It can be applied to the water pumping scene with multiple suction ports and multiple discharge ports, the water outlet pipe is connected to the centrifugal pump and the water jet vacuum pump based on the cabin cleaning system of the valve, the high and low water inlet of the cargo tank water collector is connected to the water inlet pipe, efficient cabin cleaning is realized by quick switching, and fresh water consumption is significantly reduced and the pipeline is simplified.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a multi-channel distribution valve with water-saving function and a scavenging system using the valve. Background Technology

[0002] Existing transport vessels need to clean their cargo holds after use and before the next loading to ensure that the cargo holds are clean and meet loading requirements. Usually, the cargo holds need to be rinsed with fresh water, and the cleaning water flows into the cargo hold's water collection well, and then is further pumped away using a tank cleaning pump.

[0003] The existing scavenging system mainly includes scavenging pumps, pipelines, and several valves. There are two types of scavenging pumps: one is a centrifugal pump, which has a large displacement and high efficiency, suitable for large-flow drainage; the other is a water jet vacuum pump, which is mainly used to discharge the last residual water in the sump. The two types of pumps have different application scenarios, so the suction port height corresponding to the sump is also different. The suction port of the centrifugal pump is located at a higher position in the sump, and its suction port is a high-level water inlet to avoid sucking solids (particulate matter) into the centrifugal pump and accelerating the wear of the centrifugal pump impeller. Although the water jet vacuum pump has low efficiency, it has good self-priming ability and no moving parts inside. It can be used to pump residual water containing solids (particulate matter) in the sump. Therefore, its suction port is usually inserted directly into the bottom of the sump, which is a low-level water inlet. Each cargo hold typically has a water collection well on its left and right sides. To ensure smooth pumping from multiple cargo hold water collection wells, several valves are required between the wells and the corresponding centrifugal pumps and water jet vacuum pumps. Existing cleaning systems primarily use butterfly valves or gate valves. During cleaning, the cleaning water is continuously flushed, only shut off at the end of the cleaning process. After the cleaning water flows into the water collection wells and reaches a certain level, the centrifugal pumps pump out the water. The centrifugal pumps quickly remove water from the wells above the high-level inlet. After removal, the pumps are stopped or diverted to other water collection wells via a switching valve. Water jet vacuum pumps can be activated after cleaning of each compartment is complete or during cleaning. Small solid particles (such as rust particles and dust) flowing into the water collection wells during cargo hold cleaning can be removed by the water jet vacuum pumps. To quickly get the ship into a suitable loading condition, multiple holds are often cleaned simultaneously. During this process, centrifugal pumps and water jet vacuum pumps continuously alternate between different cargo holds to pump water. Because butterfly valves or gate valves have slow operating speeds, low efficiency, and poor integration, a large number of valves are used. The valves have slow response speeds and long switching times, which in turn prolongs the cleaning time and increases water consumption. For ocean-going vessels, fresh water is relatively precious, and the high consumption of fresh water for cleaning cargo holds has an adverse impact on the economic operation of the ship. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-channel distribution valve with water-saving function, which enables the valve body to switch quickly between multiple channels. It has a fast response speed, which can significantly improve the tank cleaning speed and reduce fresh water consumption. At the same time, it has a high degree of integration, which can simplify the pipeline and reduce manufacturing costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-channel quick-change water-saving valve, comprising a hollow valve body, with a left end cover and a right end cover on both sides of the valve body, and a rotatable main shaft installed between the left end cover and the right end cover. One end of the main shaft extends out of the left end cover or the right end cover and is connected to a servo motor for transmission. Within the valve body, from left to right, on the outer periphery of the main shaft, are arranged a sealing ring 1, a wear-resistant ring 1, a gear disk, a sealing ring 2, a wear-resistant ring 2, a support disk, a sealing ring 3, and a wear-resistant ring 3. The gear disk is rotatably mounted on the main shaft via bearings, and the wear-resistant ring 1 and the sealing ring 2 are fixed on both sides of the gear disk. The support disk is mounted on the main shaft via a key, and the wear-resistant ring... The second and third sealing rings are fixed on both sides of the support plate; the third wear-resistant ring is fixed on the inner side of the right end cover; a spring is provided between the first sealing ring and the left end cover, and the spring pushes the first wear-resistant ring to the right, so that three dynamic sealing surfaces are formed between the first and the second wear-resistant ring, between the second wear-resistant ring and the third sealing ring; a second servo motor is installed on the valve body, and the output shaft end of the second servo motor that extends into the valve body is provided with a drive gear, which meshes with the teeth set on the outer circumference of the gear disk; eight water inlet pipes are evenly distributed along the circumference on the right end cover, and four water outlet pipes are provided at the corresponding circumferential positions on the left end cover; the first sealing ring and the first wear-resistant ring... The gear disc, sealing ring two, wear-resistant ring two, support disc, sealing ring three, and wear-resistant ring three are equipped with internal channels. The rotation of the gear disc and support disc selectively and intermittently connects the eight inlet pipes to the four outlet pipes. The left end cover has four outlet pipes corresponding to positions at 45°, 90°, 225°, and 270° along the circumference of the main shaft. The right end cover has eight inlet pipes, starting from 0° and spaced at 45° intervals, totaling eight. The internal channel on sealing ring one is a circular hole corresponding to each of the four outlet pipes. The internal channel on wear-resistant ring one consists of two oblong holes, covering 45°~90° and 135° respectively. 180° circumferential angle; the internal channel of the second sealing ring consists of two oblong holes, covering 67.5°~90° and 157.5°~180° circumferential angles respectively; the gear disk has holes connecting the corresponding channels of the first wear-resistant ring and the second sealing ring; the second wear-resistant ring has two arc-shaped holes, covering 315°~90° and 135°~270° circumferential angles respectively; the internal channel of the third wear-resistant ring consists of round holes corresponding to the eight water inlet pipes, and the third sealing ring has two corresponding round holes, symmetrically arranged; the support disk has holes connecting the holes on the third sealing ring to the corresponding arc-shaped holes on the second wear-resistant ring; the distance between each internal channel and the main shaft axis is equal.

[0006] This invention uses a gear disk and main shaft rotation to intermittently connect eight inlet pipes on the right end to four outlet pipes on the left end. Each of the four outlet pipes can be connected to a different water pump, making it applicable to pumping scenarios with multiple suction ports and discharge ports. A typical application is in a swivel system; for example, two of the four outlet pipes can be connected to a centrifugal pump, and the other two to a water jet vacuum pump. This allows for single-pump or dual-pump pumping of the same inlet pipe, and in some cases, it can even allow pumping of two different inlet pipes using different pumps. Compared to existing technologies, the advantages of this invention are: 1. Fast switching and high response speed Traditional valves typically require large rotation angles (such as 90° or 180°) to change the flow path. This solution achieves rapid switching through a combination of two motion modes: First, gear drive: Servo motor 2 drives the gear disk to rotate via a drive gear. Wear ring 1, the gear disk, and sealing ring 2 rotate simultaneously. A very small rotation angle (e.g., from one 45° interval to the next) is sufficient to instantly change the connection between the inlet and outlet pipes. This is much faster than rotating the entire valve core. Second, spindle drive: Servo motor 1 drives the spindle to rotate, causing the support plate, wear ring 2, and sealing ring 3 to rotate. This can completely cut off or connect certain flow paths, or, in conjunction with the gear disk, perform more complex timing control. Due to the precision servo control, the action is equally rapid.

[0007] Because the valve body switches between different water circuit modes in a very short time, for the scavenging system, this means that the pumping sequence of different compartments can be switched instantly, which greatly improves the efficiency of operation.

[0008] 2. Significantly improves cabin sweeping speed The valve's rapid switching capability directly translates into improved tank cleaning efficiency, allowing for continuous, uninterrupted operation. While one line is flushing, the other is already ready, enabling instantaneous switching and eliminating waiting time. This significantly increases the turnaround rate of ships or equipment.

[0009] 3. Reduce freshwater consumption This is a direct benefit of rapid conversion and is also key to environmental protection and economy. Traditional valve switching is slow, and the flushing water for cleaning the tanks needs to be continuously collected in the sump before it can be pumped normally. This makes the pumping process itself discontinuous, often resulting in the pump running dry without drawing water. It is necessary to wait for the sump to be full before pumping water or to switch to other compartments for pumping. During this process, the flushing water does not stop flushing, and the pumping cannot respond and switch in time, resulting in water waste. Especially when using fresh water for tank cleaning, reducing the consumption of fresh water for cleaning cargo holds has a great impact on the economic operation of ships, which is especially important for ocean-going vessels where fresh water supply is difficult.

[0010] 4. High integration and simplified piping Traditional multi-channel water distribution systems often require multiple independent valves in parallel, numerous pipe fittings, and complex piping layouts. This invention employs a compact valve body that integrates the distribution, switching, and on / off functions of 8 inputs and 4 outputs into a single valve body, eliminating the need for numerous tees, elbows, flanges, and the valve body itself.

[0011] Furthermore, the sealing ring one is connected to the four water outlet pipes via a sealing assembly. A circular hole is provided on the left end cap corresponding to the four water outlet pipes. The sealing ring one has a guide portion extending into the circular hole. A foldable and retractable flexible connection is provided between the guide portion and the circular hole on the left end cap. One end of the flexible connection is fixed to the guide portion by a pressure plate one, and the other end of the flexible connection is fixed into the circular hole by a pressure plate two. The guide portion extends into the circular hole of the left end cap, serving a radial positioning and guiding function to prevent the sealing ring one from tilting. The flexible connection is foldable and retractable, allowing the sealing ring to be sealed circumferentially and movable axially, ensuring both flow channel continuity and allowing axial movement of the sealing ring one.

[0012] Furthermore, multiple springs are provided along the circumference of the sealing ring one, and spring holes are provided on the inner wall of the left end cap. The springs are installed in the spring holes, and the protruding ends of the springs elastically abut against the left side surface of the sealing ring one. Positioning through the spring holes prevents spring instability, enhances vibration resistance and resistance to high-frequency switching disturbances, and applies a uniformly distributed axial force to the same annular surface through multiple springs, so that the sealing ring one moves purely axially without tilting. Its direct effect is that the three dynamic sealing surfaces (between sealing ring one and wear-resistant ring one, between wear-resistant ring two and sealing ring two, and between sealing ring three and wear-resistant ring three) maintain uniform line contact or surface contact during the entire switching process, significantly improving sealing reliability and preventing cross-flow leakage.

[0013] Furthermore, an internal leakage indicator hole is provided at the bottom of the valve body. The presence of an internal leakage hole can be detected through the indicator hole, and maintenance or replacement can be performed if necessary.

[0014] Furthermore, the sealing ring one, sealing ring two, and sealing ring three are made of hardened carbon steel; the wear-resistant ring one, wear-resistant ring two, and wear-resistant ring three are made of carbon-copper alloy. The carbon-copper alloy contains dispersed graphite phases, possesses excellent self-lubricating properties, requires no external lubricant, and exhibits good sealing performance; the hardened carbon steel has high surface hardness and is not easily scratched; the combination of these two materials results in a low coefficient of friction, significantly reducing starting torque.

[0015] The second objective of this invention is to provide a hull-cleaning system for the aforementioned multi-channel quick-change water-saving valve. Two water outlet pipes at 45° and 90° positions on the left end cover are connected to the inlet of a centrifugal pump, and two water outlet pipes at 225° and 270° positions are connected to the vacuum inlet of a water jet vacuum pump. Of the eight water inlet pipes on the right end cover, four inlet pipes at 90°~225° positions are all or partially connected to the high-level inlet of the cargo hold's water collection well, and the remaining four inlet pipes are all or partially connected to the low-level inlet of the cargo hold's water collection well. The outlet of the centrifugal pump and the outlet of the water jet vacuum pump are connected to the outside of the ship's hull.

[0016] Furthermore, of the eight water inlet pipes on the right end cover, three inlet pipes with a circumferential angle of 90°~180° are connected to the high-level water inlet of the cargo hold's water collection well, and three inlet pipes with a circumferential angle of 270°~0° are connected to the low-level water inlet of the cargo hold's water collection well. The water inlet pipes of the multi-channel quick-change water-saving valve of this invention do not need to be used entirely; a portion can be used selectively. In this case, the corresponding pump can simultaneously draw water from one inlet with two pumps, or a single pump can draw water from one inlet. Simultaneously, the suction ports of other pumps are blocked, reducing the use of other valves on the pipeline. The unused remaining water inlets can be closed or connected to other suction positions as backup suction ports, such as connecting to the sewage well of the anchor chain compartment.

[0017] Furthermore, two or more sets of the multi-channel quick-change water-saving valves are connected in parallel.

[0018] Furthermore, the rated displacement ratio of the two centrifugal pumps is 1:2. Depending on the water intake requirements, single-pump or dual-pump suction can be used. When both centrifugal pumps are suctioning simultaneously, the displacement is 3 units. When suctioning with a single pump, the displacement can be selected as 1 unit or 2 units, which has an energy-saving effect.

[0019] Furthermore, the inlets of the two centrifugal pumps and the vacuum suction ports of the two water jet vacuum pumps are connected via bypass valves. By switching the bypass valves on and off, the centrifugal pumps and water jet vacuum pumps can have more suction and discharge combinations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the multi-channel fast switching water-saving valve of the present invention.

[0021] Figure 2 for Figure 1 The left view shows the four water outlet pipes and their distribution.

[0022] Figure 3 for Figure 1 The right view shows the structure and distribution of the eight water inlet pipes.

[0023] Figure 4This is a schematic diagram of the internal structure of the valve body.

[0024] Figure 5 for Figure 4 BB cross-section diagram.

[0025] Figure 6 for Figure 4 CC section diagram.

[0026] Figure 7 for Figure 4 DD cross-section diagram.

[0027] Figure 8 for Figure 4 EE cross-section diagram.

[0028] Figure 9 for Figure 4 FF cross-section diagram.

[0029] Figure 10 for Figure 4 GG cross-section diagram.

[0030] Figure 11 for Figure 1 A magnified view of part A in the image.

[0031] Figure 12 This is a diagram of the cabin sweeping system piping.

[0032] Figure 13 The phase diagram shows the initial position of the internal connection of the valve body. The phase diagram can clearly show its connection status. From the inside out, it represents sealing ring one, wear-resistant ring one, sealing ring two, wear-resistant ring two, sealing ring three, and wear-resistant ring three, respectively. The diagram shows that G1 is connected to B3 and B4, and the other passages are not connected.

[0033] Figure 14 The phase diagram shows the connection between the valve body and another position. It is the state after the main shaft rotates 45° and the gear disk rotates 112.5°. It shows that G6 and B1 are connected, and the rest are not connected.

[0034] In the diagram: 1. Base, 2. Valve body, 3. Spring, 4. Spring hole, 5. Water outlet pipe, 6. Sealing ring 1, 7. Left end cover, 8. Servo motor 1, 9. Left bearing, 10. Intermediate bearing, 11. Wear-resistant ring 1, 12. Servo motor 2, 13. Drive gear, 14. Gear disc, 15. Sealing ring 2, 16. Wear-resistant ring 2, 17. Turntable, 18. Sealing ring 3, 19. Wear-resistant ring 3, 20. Water inlet pipe, 21. Right end cover, 22. Bearing cover, 23. Right bearing, 24. Main shaft, 25. Key, 26. Pressure plate 1, 27. Pressure plate 2, 28. Flexible connection, 29. Indicator water hole, 30. Bypass valve, P1 and P2 centrifugal pumps, P3 and P4 water jet vacuum pumps. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] like Figures 1 to 10 As shown, a multi-channel quick-change water-saving valve includes a hollow valve body 2. A left end cover 7 and a right end cover 21 are provided on both sides of the valve body 2. A rotatable main shaft 24 is installed between the left end cover 7 and the right end cover 21. One end of the main shaft 24 extends out of the left end cover 7 and is connected to a servo motor 8 for transmission. Inside the valve body 2, from left to right, around the main shaft 24, are arranged a sealing ring 6, a wear-resistant ring 11, a gear disk 14, a second sealing ring 15, a second wear-resistant ring 16, a support disk, a third sealing ring 18, and a third wear-resistant ring 19. The gear disk 14 is rotatably mounted on the main shaft 24 via bearings. The first wear-resistant ring 11 and the second sealing ring 15 are fixed on both sides of the gear disk 14. The support disk is mounted on the main shaft 24 via a key 25. The second wear-resistant ring 16 and the sealing ring 19... Three 18 rings are fixed on both sides of the support plate; three wear-resistant rings are fixed on the inner side of the right end cover 21; a spring 3 is provided between the sealing ring 16 and the left end cover 7; the spring 3 pushes the wear-resistant ring 11 to the right, so that three dynamic sealing surfaces are formed between the sealing ring 16 and the wear-resistant ring 11, between the wear-resistant ring 26 and the sealing ring 25, and between the sealing ring 38 and the wear-resistant ring 39; a servo motor 212 is installed on the valve body 2; the output shaft end of the servo motor 212 that extends into the valve body 2 is provided with a drive gear 13; the drive gear 13 meshes with the teeth set on the outer periphery of the gear disk 14; eight water inlet pipes 20 are evenly distributed along the circumference on the right end cover 21, and four water outlet pipes 5 are provided at the corresponding circumferential positions on the left end cover 7; sealing ring 16, wear-resistant ring 28, and wear-resistant ring 19 are fixed on the inner side of the right end cover 21. Internal channels are provided on ring 11, gear disk 14, sealing ring 25, wear-resistant ring 26, support disk, sealing ring 38, and wear-resistant ring 39. The rotation of gear disk 14 and support disk selectively and intermittently connects the eight inlet pipes 20 to the four outlet pipes 5. The left end cover 7 has four outlet pipes 5 corresponding to positions at 45°, 90°, 225°, and 270° around the main shaft 24. The eight inlet pipes 20 on the right end cover 21 are distributed at 45° intervals, starting from 0°. The internal channels on sealing ring 16 are circular holes corresponding to the four outlet pipes 5. The internal channels on wear-resistant ring 11 are two oblong holes, covering 45°~90° and 13° respectively. The internal channels on the second sealing ring 15 are two oblong holes, covering 67.5°~90° and 157.5°~180° circumferential angles respectively; the gear disk 14 is provided with holes that connect the corresponding channels of the first wear-resistant ring 11 and the second sealing ring 15; the second wear-resistant ring 16 is provided with two arc-shaped holes, covering 315°~90° and 135°~270° circumferential angles respectively; the internal channels on the third wear-resistant ring 19 are round holes corresponding to the eight water inlet pipes 20, and the third sealing ring 18 is provided with two corresponding round holes, symmetrically arranged; the support disk is provided with holes that connect the holes on the third sealing ring 18 and the arc-shaped holes on the second wear-resistant ring 16 respectively; the distance between each internal channel and the axis of the main shaft 24 is equal.

[0037] A left bearing 9 is installed between the main shaft 24 and the left end cover 7, and a right bearing 23 is installed between the main shaft 24 and the right end cover 21. An intermediate bearing 10 is installed between the gear disk 14 and the main shaft 24. A bearing cover 22 is also provided on the right end cover to seal the right bearing 23.

[0038] The sealing ring 6 is connected to the four water outlet pipes 5 via a sealing assembly. The left end cover 7 has a round hole corresponding to the four water outlet pipes 5. The sealing ring 6 has a guide part that extends into the round hole. A foldable and telescopic flexible connection 28 is provided between the guide part and the round hole on the left end cover 7. One end of the flexible connection 28 is fixed to the guide part by the pressure plate 26, and the other end of the flexible connection 28 is fixed in the round hole by the pressure plate 27.

[0039] Multiple springs 3 are provided along the circumference of the sealing ring 6. Spring holes 4 are provided on the inner wall of the left end cover 7. Springs 3 are installed in spring holes 4, and the protruding end of springs 3 elastically abuts against the left side surface of the sealing ring 6.

[0040] The valve body 2 has an internal leakage indicator hole 29 at its bottom. The valve body 2 has a base 1 at its bottom, which can be used to fix it.

[0041] The sealing ring 16, sealing ring 25 and sealing ring 38 are made of hardened carbon steel; the wear-resistant ring 11, wear-resistant ring 26 and wear-resistant ring 39 are made of carbon copper alloy.

[0042] The internal channels provided on sealing ring 16, wear-resistant ring 11, sealing ring 25, wear-resistant ring 26, sealing ring 38, and wear-resistant ring 39 are as follows: Figure 5-10 As shown, its initial position phase diagram is as follows: Figure 13 As shown, where: Sealing ring one: The round hole at 45° is marked B4, the round hole at 90° is marked B3, the round hole at 225° is marked B2, and the round hole at 270° is marked B1. These correspond one-to-one with the four water outlet pipes on the left end cap and can be represented by the same markings. Figure 2 The layout is shown in the diagram.

[0043] Wear-resistant ring 1: The oblong hole covering the 45°~90° circumferential angle is marked as C1, and the oblong hole covering the 135°~180° circumferential angle is marked as C2.

[0044] Sealing ring 2: The oblong hole covering a 67.5°~90° circumferential angle is marked as D1, and the oblong hole covering a 157.5°~180° circumferential angle is marked as D2.

[0045] Wear-resistant ring 2: The arc-shaped hole covering the 315°~90° circumferential angle is marked as E1, and the arc-shaped hole covering the 135°~270° circumferential angle is marked as E2.

[0046] Sealing ring three: Two circular holes are symmetrically arranged, one located at a 90° circumferential angle and marked as F1, and the other located at a 270° circumferential angle and marked as F2.

[0047] Wear-resistant ring three: Eight round holes are evenly distributed from 0-360°, and are marked as G1, G2, G3, G4, G5, G6, G7 and G8 respectively. G1-G8 correspond one-to-one with the eight water inlet pipes on the right end cover and can be represented by the same markings.

[0048] Table 1 below shows the connection relationship between the inlet and outlet water pipes:

[0049] In Table 1, the horizontal column angles indicate that the spindle rotates in 45° increments. After rotating to 180°, the pipe connection relationships in Table 1 will be repeated. Therefore, the spindle can rotate in a full circle or reciprocate between 0-135° or 180-270°. The vertical column angles indicate that the gear disc rotates in 22.5° increments. In the table, " / " indicates connection, for example, when both the horizontal and vertical column angles are 0° (…). Figure 13 As shown in the table, G1 / B3B4 indicates that inlet pipe G1 is simultaneously connected to B3 and B4. In this case, B3 and B4 can be connected to different pumps, allowing water to be drawn from inlet pipe G1 by either a single pump or both pumps operating simultaneously. For example, when the horizontal axis is 135° and the vertical axis is 315°, it is displayed as G4 / B3 and G8 / B4. This means that in this state, the pump corresponding to B3 can draw water from inlet pipe G4, and the pump corresponding to B4 can simultaneously draw water from inlet pipe G8. Table 1 shows that there are various combinations, allowing for single-pump or dual-pump water pumping in multiple scenarios.

[0050] Based on this principle, a hull-cleaning system is constructed. For example, two water outlet pipes at 45° and 90° positions on the left end cover are connected to the inlets of centrifugal pumps, i.e., B3 connects to the inlets of centrifugal pump P1 and B4 connects to the inlets of centrifugal pump P2; two water outlet pipes at 225° and 270° positions are connected to the vacuum suction ports of water jet vacuum pumps P3 and P4, respectively; of the eight water inlet pipes on the right end cover, four water inlet pipes at 90°~225° circumferential positions are connected to the high-level water inlets of the four water collection wells in the cargo hold, and the remaining four water inlet pipes are connected to the low-level water inlets of the four water collection wells in the cargo hold. The outlets of the centrifugal pumps and the water jet vacuum pumps are connected to the outside of the ship's hull. Two or more sets of multi-channel quick-change water-saving valves are installed in parallel, such as... Figure 12 The diagram shows the connection piping between two sets of multi-channel quick-change water-saving valves V1 and V2 and centrifugal pumps P1 and P2, as well as water jet vacuum pumps P3 and P4.

[0051] The rated displacement ratio of the two centrifugal pumps P1 and P2 is 1:2. Depending on the water intake requirements, single-pump or dual-pump suction can be used. When both centrifugal pumps are pumping simultaneously, the displacement is P1 + P2. When pumping with a single pump, the displacement can be selected as either P1 or P2, which has energy-saving effects.

[0052] The inlets of the two centrifugal pumps P1 and P2, and the vacuum ports of the two water jet vacuum pumps P3 and P4 are connected via bypass valve 30.

[0053] During operation, centrifugal pumps P1 and P2 draw water from the higher level of the collection well, while water jet vacuum pumps P3 and P4 draw water from the lower level of residual water. When a centrifugal pump is detected as unable to draw water from the corresponding inlet well, it can be switched to draw water from other collection wells in a timely manner. When using water jet vacuum pumps to draw residual water, the same rapid switching is performed, which can significantly improve the cleaning speed.

[0054] When constructing the scavenging system, it is not necessary to utilize all the inlet pipes. Only a portion can be used as needed, for example, using only six inlet pipes: G1, G2, G3, G5, G6, and G7. The remaining two inlet pipes, G4 and G8, are sealed with blind flanges. This achieves the best results. As shown in Table 1 above, in the G1 / B3B4, G2 / B3B4, and G3 / B3B4 states, centrifugal pumps P1 and P2 jointly draw water from G1, G2, and G7. Water in the corresponding inlet pipe can be pumped by rotating the main shaft sequentially from 0° to 45° to 90°. In states G1 / B3, G2 / B3, and G3 / B3, centrifugal pump P1 can independently pump water from the corresponding inlet pipes G1, G2, and G3. In states G1 / B4, G2 / B4, and G3 / B4, centrifugal pump P2 can independently pump water from the corresponding inlet pipes G1, G2, and G3. During single-pump pumping, the inlets of the other pumps are isolated, eliminating the need to switch other valves. Similarly, in states G5 / B1B2, G6 / B1B2, and G7 / B1B2, water jet vacuum pumps P3 and P4 can perform dual-pump pumping of the corresponding inlet pipes G5, G6, and G7. In states G5 / B2, G6 / B2, and G7 / B2, as well as G5 / B1 and G6 / B1 (…),… Figure 14 In the states shown (G7 / B1), water jet vacuum pumps P3 or P4 can pump water from the inlet pipes corresponding to G5, G6, and G7. Switching between the three can be achieved simply by rotating the main shaft within a 90° angle range. During this process, the inlets of the other pumps are blocked.

[0055] The significance of this blocking effect is that if the pump stops while it is working and the inlet or outlet is not shut off, seawater will backflow. Under normal use, both the pump inlet and outlet need to be shut off, and the relevant valves need to be closed when the pump stops. However, with this solution, it is not necessary to shut off the shut-off valves, which can reduce the number of operation steps and increase the pumping speed.

[0056] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A multi-channel quick-change water-saving valve, comprising a hollow valve body, characterized in that: The valve body has a left end cover and a right end cover on both sides. A rotatable main shaft is installed between the left and right end covers. One end of the main shaft extends out of either the left or right end cover and is connected to a servo motor. Inside the valve body, from left to right, around the outer circumference of the main shaft, are arranged a sealing ring 1, a wear-resistant ring 1, a gear disc, a sealing ring 2, a wear-resistant ring 2, a support disc, a sealing ring 3, and a wear-resistant ring 3. The gear disc is rotatably mounted on the main shaft via bearings, and the wear-resistant ring 1 and the sealing ring 2 are fixed to both sides of the gear disc. The support disc is keyed onto the main shaft, and the wear-resistant ring 2 and the sealing ring 3 are fixed to both sides of the support disc. The wear-resistant ring 3 is fixed to the inner side of the right end cover. A spring is provided between the sealing ring 1 and the left end cover. The spring pushes the wear-resistant ring 1 to the right, forming three dynamic sealing surfaces between the sealing ring 1 and the wear-resistant ring 1, between the wear-resistant ring 2 and the sealing ring 2, and between the sealing ring 3 and the wear-resistant ring 3. A servo motor 2 is installed on the valve body. The output shaft end of the servo motor 2, which extends into the valve body, is equipped with a drive gear. The drive gear meshes with the teeth set on the outer circumference of the gear disk. Eight water inlet pipes are evenly distributed along the circumference on the right end cover, and four water outlet pipes are provided at corresponding circumferential positions on the left end cover. The components include: sealing ring 1, wear-resistant ring 1, gear disk, sealing ring 2, wear-resistant ring 2, support disk, and sealing ring 3. The third ring and the third wear-resistant ring are equipped with internal channels, which selectively and intermittently connect the eight inlet pipes and four outlet pipes through the rotation of the gear disc and the support disc; the left end cover has four outlet pipes corresponding to the 45°, 90°, 225° and 270° positions of the main shaft circumference respectively; the eight inlet pipes on the right end cover are distributed at 45° intervals, starting from 0°; the internal channel on the first sealing ring is a circular hole corresponding to each of the four outlet pipes; the internal channel on the first wear-resistant ring is two oblong holes, covering the circumferential angles of 45°~90° and 135°~180° respectively; sealing The internal channels on ring two are two oblong holes, covering circumferential angles of 67.5°~90° and 157.5°~180° respectively; the gear disk has holes connecting the corresponding channels of wear-resistant ring one and sealing ring two; wear-resistant ring two has two arc-shaped holes, covering circumferential angles of 315°~90° and 135°~270° respectively; the internal channels on wear-resistant ring three are circular holes corresponding to the eight water inlet pipes, and sealing ring three has two corresponding circular holes, symmetrically arranged; the support plate has holes connecting the holes on sealing ring three to the arc-shaped holes on wear-resistant ring two respectively; the distance between each internal channel and the main shaft axis is equal.

2. The multi-channel quick-change water-saving valve according to claim 1, characterized in that: The sealing ring is connected to the four water outlet pipes via a sealing assembly. The left end cap has a circular hole corresponding to the four water outlet pipes. The sealing ring has a guide part that extends into the circular hole. A foldable and telescopic flexible connection is provided between the guide part and the circular hole on the left end cap. One end of the flexible connection is fixed to the guide part by a pressure plate, and the other end of the flexible connection is fixed to the circular hole by a pressure plate.

3. A multi-channel quick-change water-saving valve according to claim 1 or 2, characterized in that: Multiple springs are provided along the circumference of the sealing ring one. A spring hole is provided on the inner wall of the left end cover. The spring is installed in the spring hole, and the protruding end of the spring elastically abuts against the left side surface of the sealing ring one.

4. A multi-channel quick-change water-saving valve according to claim 1 or 2, characterized in that: An internal leakage indicator hole is provided at the bottom of the valve body.

5. A multi-channel quick-change water-saving valve according to claim 1 or 2, characterized in that: The sealing ring 1, sealing ring 2, and sealing ring 3 are made of hardened carbon steel; the wear-resistant ring 1, wear-resistant ring 2, and wear-resistant ring 3 are made of carbon copper alloy.

6. A scavenging system utilizing the multi-channel rapid switching water-saving valve of claim 1, characterized in that: The two water outlet pipes at 45° and 90° on the left end cover are connected to the inlet of the centrifugal pump, and the two water outlet pipes at 225° and 270° are connected to the vacuum suction port of the water jet vacuum pump. Of the eight water inlet pipes on the right end cover, four of the water inlet pipes at 90° to 225° on the circumference are all or partially connected to the high water inlet of the cargo hold's water collection well, and the remaining four water inlet pipes are all or partially connected to the low water inlet of the cargo hold's water collection well. The outlet of the centrifugal pump and the outlet of the water jet vacuum pump are connected to the outside of the ship's side.

7. The cabin sweeping system according to claim 6, characterized in that: Of the eight water inlet pipes on the right end cover, three water inlet pipes with a circumferential angle of 90° to 180° are connected to the high-level water inlet of the cargo hold's water collection well, and three water inlet pipes with a circumferential angle of 270° to 0° are connected to the low-level water inlet of the cargo hold's water collection well.

8. The cabin sweeping system according to claim 6 or 7, characterized in that: The multi-channel quick-change water-saving valve is configured in two or more sets in parallel.

9. The cabin sweeping system according to claim 6 or 7, characterized in that: The rated displacement ratio of the two centrifugal pumps is 1:

2.

10. The cabin sweeping system according to claim 6 or 7, characterized in that: The inlets of the two centrifugal pumps and the vacuum ports of the two water jet vacuum pumps are connected by bypass valves.

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