Opening and closing device of vacuum flushing system and vacuum flushing system

Abstract

The invention discloses an opening and closing device of a vacuum flushing system and the vacuum flushing system, and relates to the technical field of vacuum flushing, the opening and closing device comprises a base, a sealing piece and a driving assembly, the base is provided with a first sealing surface, the base is further provided with an air exhaust channel and a pressure relief channel, and the air exhaust channel and the pressure relief channel both penetrate through the first sealing surface; the driving assembly is in transmission connection with the sealing piece, the driving assembly can apply an effect in the first direction to the sealing piece so as to drive the sealing piece to move from the first position to the second position, and the driving assembly can apply an effect in the second direction to the sealing piece so as to drive the sealing piece to move from the second position to the first position; when the sealing part is located at the first position, the pressure relief channel is closed through the sealing part, when the sealing part is located at the second position, the pressure relief channel is opened through the sealing part, and the first direction is the direction pointing to the negative pressure side from the normal pressure side. According to the opening and closing device of the vacuum flushing system and the vacuum flushing system, force needed for opening in the vacuum state is smaller, and generated noise is lower.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum flushing, and in particular to an opening and closing device of a vacuum flushing system and a vacuum flushing system. Background Art

[0002] Whether it is a sewage treatment facility or a water storage facility, after a pool has been used for a long time, solid pollutants such as silt will settle at the bottom of the pool. These solid pollutants will not only cause the water quality in the pool to deteriorate further, but also occupy the volume of the pool, so the solid pollutants at the bottom of the pool need to be cleaned regularly.

[0003] A vacuum flushing method can be used to pass a large amount of water into the pool to be cleaned in a short time, forming a water flow with impact force to flush the solid pollutants at the bottom of the pool. Specifically, a flushing pool is built on one side of the pool, the bottom of the flushing pool is connected to the pool, and an opening and closing device is provided on the top of the flushing pool. The flushing pool is evacuated, and the water in the pool will be pressed into the flushing pool for storage. When the pool needs to be flushed, the opening and closing device is opened, and the flushing pool is connected to the external atmosphere to destroy the vacuum environment. The water in the flushing pool is flushed into the pool to flush away the solid pollutants at the bottom of the pool. However, when the current opening and closing device is opened in a vacuum state, a large driving force is required to overcome the corresponding negative pressure, and the noise generated at the moment of opening is large. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an opening and closing device for a vacuum flushing system, which requires less force to open under vacuum conditions and generates less noise.

[0005] The invention also provides a vacuum flushing system.

[0006] The opening and closing device of the vacuum flushing system according to the first embodiment of the present invention comprises a base, the base is provided with a first sealing surface, the first sealing surface is used for sealing around the communication port, the base is also provided with an air extraction channel and a pressure relief channel, the air extraction channel and the pressure relief channel both pass through the first sealing surface; Seals; A driving assembly is drivingly connected to the seal, the driving assembly can exert an action along a first direction on the seal to thereby drive the seal to move from the first position to the second position, the driving assembly can exert an action along a second direction on the seal to thereby drive the seal to move from the second position to the first position, wherein when the seal is in the first position, the seal closes the pressure relief channel, and when the seal is in the second position, the seal opens the pressure relief channel, the first direction is a direction from the normal pressure side to the negative pressure side, and the second direction is opposite to the first direction.

[0007] The opening and closing device of the vacuum flushing system according to the embodiment of the present invention has at least the following beneficial effects: the base is used to connect to the connecting port of the water storage container, the water storage container can be a flushing pool, the first sealing surface is sealed with the pool wall of the flushing pool, the air suction channel and the pressure relief channel are connected with the inside of the flushing pool through the connecting port; the sealing member closes the pressure relief channel, and the flushing pool is vacuumed through the air suction channel; when the vacuum needs to be broken, as long as the driving component is actuated, the air outside the water storage container will push the sealing member toward the inside of the water storage container, that is, the pressure relief channel is opened, and there is no need to overcome the negative pressure. The force required to open the pressure relief channel in a vacuum state is smaller, and the noise generated is lower.

[0008] According to some embodiments of the present invention, the first sealing surface is provided with an annular boss, a first sealing ring is provided on one side of the annular boss, and the first sealing ring protrudes out of the surface of the annular boss.

[0009] According to some embodiments of the present invention, a port of the pressure relief channel located on the first sealing surface is defined as a pressure relief port, and the seal is in the first position, and the seal covers and seals the pressure relief port.

[0010] According to some embodiments of the present invention, the base is provided with a plurality of the exhaust channels, the plurality of the exhaust channels are arranged around the pressure relief channel, the base is provided with a connecting cavity, the connecting cavity is connected with the plurality of the exhaust channels, and the base is provided with an interface, the interface is connected with the connecting cavity.

[0011] According to some embodiments of the present invention, the driving assembly includes a first driving cylinder, in which a first piston rod is inserted, one end of the first piston rod extends to the outside of the first driving cylinder, the first driving cylinder is used to push the first piston rod to move, and the end of the first piston rod located outside the first driving cylinder is connected to the sealing member.

[0012] According to some embodiments of the present invention, a locking assembly is further included, wherein the locking assembly is connected to the sealing member, and the locking assembly has a locked state and an unlocked state. In the locked state, the locking assembly prevents the sealing member from moving.

[0013] According to some embodiments of the present invention, the locking assembly includes a first sleeve and a locking rod, the axis of the first sleeve is parallel to the first direction, the locking rod is connected to the sealing member, the locking rod is placed in the first sleeve, the side wall of the first sleeve is provided with a first guide groove along the axial direction of the first sleeve, a locking groove is provided at one end of the first guide groove, the locking groove is perpendicular to the first guide groove and are connected to each other, the locking rod passes through the first guide groove and can move along the first guide groove, the first sleeve is connected to a rotation drive assembly, the rotation drive assembly can drive the first sleeve to rotate to the locked state or the unlocked state, when the first sleeve is in the locked state, the locking rod is located in the locking groove, and when the first sleeve is in the unlocked state, the locking rod is located in the first guide groove.

[0014] According to some embodiments of the present invention, the first piston rod passes through the first drive cylinder, the locking assembly also includes a second sleeve, the second sleeve is sleeved outside the first sleeve, the side wall of the second sleeve is provided with a second guide groove along the axial direction of the second sleeve, the locking rod also passes through the second guide groove, when the first sleeve is in the locked state, the first guide groove and the second guide groove are misaligned, and when the first sleeve is in the unlocked state, the first guide groove and the second guide groove have the same orthographic projection on the longitudinal section of the first sleeve.

[0015] According to some embodiments of the present invention, the rotation drive assembly includes a second drive cylinder and a crank rod, the second drive cylinder is inserted with a second piston rod, one end of the crank rod is connected to the first sleeve, the other end of the crank rod is connected to the end of the second piston rod, and the moving path of the second piston rod does not pass through the rotation center of the first sleeve.

[0016] According to the vacuum flushing system of the second embodiment of the present invention, the vacuum flushing system is equipped with the above-mentioned opening and closing device of the vacuum flushing system.

[0017] The vacuum flushing system according to the embodiment of the present invention has at least the following beneficial effects: when the vacuum needs to be broken, the atmospheric pressure will push the seal to move toward the inside of the flushing pool, that is, the pressure relief channel is opened without overcoming the negative pressure. The force required to open it under vacuum is smaller and the noise generated is lower.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a structural schematic diagram of the opening and closing device of the vacuum flushing system according to an embodiment of the present invention; Figure 2 It is a partial enlarged structural schematic diagram of the opening and closing device of the vacuum flushing system according to an embodiment of the present invention; Figure 3 It is a partial cross-sectional structural schematic diagram of an opening and closing device of a vacuum flushing system according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the opening and closing device of the vacuum flushing system according to an embodiment of the present invention from a second perspective; Figure 5 is a structural schematic diagram of a locking assembly according to an embodiment of the present invention; Figure 6 1 is an exploded view of a locking assembly according to an embodiment of the present invention.

[0020] Figure Number: Base 100, first sealing surface 101, exhaust channel 110, pressure relief channel 120, annular boss 130, first sealing ring 140, connecting cavity 150, interface 160, seal 200, second sealing surface 201, second sealing ring 210, drive assembly 300, first drive cylinder 310, first piston rod 320, locking assembly 400, first sleeve 410, first guide groove 411, locking groove 412, second sleeve 420, second guide groove 421, locking rod 430, rotation drive assembly 500, second drive cylinder 510, second piston rod 511, crank rod 520. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] As described in the background technology, when the current opening and closing device is opened under a vacuum state, a large driving force is required to overcome the vacuum state, and the noise generated at the moment of opening is large. For example, in an implementation structure of the prior art, the sealing plate cover is arranged on the sealing protrusion connector to achieve the sealing of the channel. If the channel needs to be opened to break the vacuum, its driving mechanism needs to move the sealing plate upward. In the above structure, the upper side of the sealing plate is the normal pressure side, and the lower side of the sealing plate is the negative pressure side after vacuuming. The atmospheric pressure is applied to the sealing plate, and the direction of the force is downward, so the driving mechanism needs to overcome the negative pressure, that is, it needs to overcome the force of the atmospheric pressure on the sealing plate, in order to lift the sealing plate and then open the channel. At the moment of opening the channel, the external air quickly flows into the vacuum area and collides with other air or objects in the vacuum area, generating a large noise.

[0026] Reference Figure 1 and Figure 3 As shown, an opening and closing device of a vacuum flushing system according to an embodiment of the present invention is used to cooperate with the opening and closing of the communication port of a water storage container, and includes a base 100, a sealing member 200 and a driving assembly 300. The sealing member 200 may be a plate-like structure, such as a sealing plate.

[0027] The base 100 is provided with a first sealing surface 101 , which is used for sealing around the connecting port. The base 100 is also provided with an air extraction channel 110 and a pressure relief channel 120 , which both pass through the first sealing surface 101 .

[0028] The water storage container can be of various styles, shapes or structures as long as it has a water storage chamber. For example, a closed flushing pool is the water storage container. The flushing pool is used as an example for the following description.

[0029] The base 100 is connected to the top of the flushing pool. Specifically, the base 100 is provided with a first sealing surface 101, which is in contact with the outer wall of the flushing pool. The first sealing surface 101 is sealed around the connecting port, so that the connecting port of the flushing pool is connected to the pressure relief channel 120. The base 100 is also provided with an air extraction channel 110, which is used to connect with a vacuum device, such as a vacuum pump, to reduce the air pressure in the flushing pool. The water in the pool connected to the flushing pool is driven by the atmospheric pressure to move toward the flushing pool and reach the target water level of the flushing pool. During the vacuuming process, the seal 200 is in a position to close the pressure relief channel 120.

[0030] The driving assembly 300 is in transmission connection with the seal 200. The driving assembly 300 can exert an action along the first direction on the seal 200 to drive the seal 200 to move from the first position to the second position. The driving assembly 300 can exert an action along the second direction on the seal 200 to drive the seal 200 to move from the second position to the first position. When the seal 200 is in the first position, the seal 200 closes the pressure relief channel 120. When the seal 200 is in the second position, the seal 200 opens the pressure relief channel 120. The first direction is the direction from the normal pressure side to the negative pressure side, and the second direction is opposite to the first direction. It can be understood that the normal pressure side refers to the side that is constantly connected to the external environment, and the negative pressure side refers to the side of the internal space of the flushing pool after the flushing pool is evacuated, and its air pressure is lower than the atmospheric pressure, which is negative pressure.

[0031] It should be understood that before vacuuming, the opening and closing device of the vacuum flushing system may have been opened once, and the seal 200 may not have closed the pressure relief channel 120. At this time, the driving component 300 is required to drive the seal 200 to move along the second direction, move the seal 200 to the first position, and close the pressure relief channel 120 before the flushing pool can be vacuumed through the exhaust channel 110.

[0032] Since the direction in which the seal 200 opens the pressure relief channel 120 is along the first direction, that is, from the normal pressure side to the negative pressure side, when the seal 200 is in the first position and the inner side of the flushing pool is in a negative pressure state, the air in the external environment has a tendency to push the seal 200 to move along the first direction, so the drive assembly 300 needs to continuously apply driving force to the seal 200 to prevent the seal 200 from moving along the first direction when vacuuming, and to keep the seal 200 in the first position at all times to close the pressure relief channel 120.

[0033] When the vacuum environment needs to be destroyed during flushing operations, the driving component 300 only needs to release the driving force on the seal 200, and the seal 200 will be affected by the atmospheric pressure, pushing the seal 200 to move along the first direction to the second position, that is, opening the pressure relief channel 120.

[0034] The pressure relief channel 120 is used to connect the washing pool with the external environment and restore the air pressure of the washing pool to atmospheric pressure. When the vacuum environment is destroyed, since the air pressure of the external environment is greater than the air pressure inside the washing pool, the air in the external environment is released into the washing pool through the channel, so it is a pressure relief channel.

[0035] During the above-mentioned flushing operation, after the driving assembly 300 releases the force, there is no need to apply power to the seal 200 to overcome the atmospheric pressure, so the force required to open the pressure relief channel 120 under the vacuum state is smaller, or the driving assembly 300 does not need to apply external force. At the same time, the seal 200 moves toward the inside of the flushing tank without overcoming the negative pressure. The driving assembly 300 can better control the movement of the seal 200, which can effectively reduce the intensity of the external air flowing into the vacuum area and reduce noise. For example, in some existing schemes, the force applied by the driving mechanism to the sealing plate is greater than the atmospheric pressure, and the moment the sealing plate moves away from the channel, the atmospheric pressure disappears instantly, and the reaction of the driving mechanism is relatively delayed, so the driving mechanism drives the sealing plate to move a long distance, the channel is completely opened, and the speed at which the external air enters the vacuum area is fast and the flow rate is large. Therefore, the air hits the wall inside the flushing tank and causes vibration, generating loud noise. In the structure of the present application, after the driving component 300 unloads the force on the seal 200, the inertia of the driving component 300 itself will hinder the movement of the seal 200 toward the second position, reducing the speed of the seal 200 moving to open the pressure relief channel 120. Therefore, the external air enters the flushing pool relatively smoothly, and the noise generated is greatly reduced.

[0036] Once again, to achieve vacuum flushing, the structure capable of evacuating and storing water does not necessarily have to be a flushing tank structure, but can also be a water storage tank, or any object or structure capable of forming a vacuum chamber, i.e., a water storage container.

[0037] Reference Figure 2 As shown, it can be understood that the first sealing surface 101 is provided with an annular boss 130 , a first sealing ring 140 is provided on one side of the annular boss 130 , and the first sealing ring 140 protrudes from the surface of the annular boss 130 .

[0038] It should be understood that the outer side of the first sealing surface 101 will also be provided with a flange portion and other connecting structures for connecting the base 100 to the wall of the flushing pool. The annular boss 130 will also extend beyond the surface of the flange portion, and its height difference will generally not be set very large. Its function is to prevent the first sealing surface 101 from being able to contact the pool wall surface when the flange portion contacts the pool wall due to the uneven pool wall of the flushing pool, thereby reducing the sealing effect. Furthermore, the annular boss 130 can also improve the pressure distribution between the first sealing surface 101 and the pool wall of the flushing pool. Specifically, the annular boss 130 can reduce the contact area with the pool wall, concentrate the pressure in the smaller annular boss 130 area, and ensure the sealing effect.

[0039] A first sealing ring 140 is also provided on one side of the annular boss 130. The first sealing ring 140 is made of elastic material, generally a rubber ring. The contact surface of the first sealing ring 140 protrudes from the surface of the annular boss 130. Before the annular boss 130 contacts the wall of the flushing tank, the first sealing ring 140 can first contact the wall of the flushing tank and be squeezed to produce deformation, so as to increase the contact area and achieve a good sealing effect. In the cooperation between the annular boss 130 and the first sealing ring 140, the annular boss 130 is a rigid structure that is not easy to deform. Therefore, after the first sealing ring 140 contacts and squeezes and deforms with the wall of the flushing tank, the annular boss 130 contacts the wall of the flushing tank again, thereby avoiding the first sealing ring 140 from being damaged by excessive compression, or excessive compression leading to uneven deformation and reducing the sealing effect.

[0040] It is understandable that the port of the air extraction channel 110 located on the first sealing surface 101 is defined as the air extraction port, and the port of the pressure relief channel 120 located on the first sealing surface 101 is defined as the pressure relief port. When the seal 200 is in the first position, the seal 200 can cover and seal the pressure relief port.

[0041] In the above structure, the first position and the second position of the seal 200 are both on the negative pressure side. When the flushing pool is evacuated, the drive assembly 300 drives the seal 200 to the first position, that is, the seal 200 covers the pressure relief port and can abut the surface around the pressure relief port.

[0042] Reference Figure 3 As shown, it can be understood that the seal 200 has a second sealing surface 201. When the seal 200 is in the first position, the second sealing surface 201 fits the surface around the pressure relief port.

[0043] The size of the seal 200 is larger than the inner diameter of the pressure relief channel 120, so that the seal 200 can move to the pressure relief port and allow the second sealing surface 201 to fit the pressure relief port. Further, it can be understood that the second sealing surface 201 is provided with a second sealing ring 210. The second sealing ring 210 can be made of the same material as the first sealing ring 140, and the contact area can be increased by using the characteristics of extrusion deformation to achieve a good sealing effect. It should be understood that when manufacturing the opening and closing device of the vacuum flushing system, the port of the pressure relief channel 120 can obtain a smoother end face through mechanical processing, so the second sealing surface 201 may not be provided with a structure similar to the annular boss 130.

[0044] It can be understood that the base 100 is provided with multiple air extraction channels 110, and the multiple air extraction channels 110 are arranged around the pressure relief channel 120. The base 100 is provided with a connecting cavity 150, and the connecting cavity 150 is connected to the multiple air extraction channels 110. The base 100 is provided with an interface 160, and the interface 160 is connected to the connecting cavity 150.

[0045] Providing multiple exhaust channels 110 can reduce the risk of the exhaust ports of the exhaust channels 110 being blocked. Even if one or a few exhaust channels 110 are blocked, the remaining exhaust channels 110 can still maintain connection with the connecting cavity 150, and the vacuum pump can continue to vacuum the flushing pool through the interface 160.

[0046] Reference Figure 4 As shown, it can be understood that the driving assembly 300 includes a first driving cylinder 310, and the first driving cylinder 310 is inserted with a first piston rod 320, one end of the first piston rod 320 extends to the outside of the first driving cylinder 310, and the first driving cylinder 310 is used to push the first piston rod 320 to move, and the end of the first piston rod 320 located outside the first driving cylinder 310 is connected to the sealing member 200. Preferably, the first driving cylinder 310 is arranged on the normal pressure side, and the end of the first piston rod 320 located outside the first driving cylinder 310 passes through the pressure relief channel 120 and is connected to the sealing member 200.

[0047] It should be understood that the first drive cylinder 310 can be a hydraulic cylinder or a pneumatic cylinder, and the first drive cylinder 310 has two chambers inside, and the chambers are separated by the piston of the first piston rod 320. Both the hydraulic cylinder and the pneumatic cylinder are mature structural components, and the specific structure is not repeated here.

[0048] Before vacuuming, the first driving cylinder 310 drives the first piston rod 320 to move the sealing member 200 from the second position to the first position, that is, the sealing member 200 closes the pressure relief channel 120. During vacuuming and maintaining the vacuum, the sealing member 200 is always in the first position.

[0049] It can be understood that a locking assembly 400 is further included, and the locking assembly 400 is connected to the sealing member 200 . The locking assembly 400 has a locked state and an unlocked state. In the locked state, the locking assembly 400 prevents the sealing member 200 from moving.

[0050] When the locking assembly 400 is provided, the driving assembly 300 is no longer required to maintain the seal 200 in the first position, and the locking assembly 400 can maintain the seal 200 in the first position by a mechanical structure fixing method, preventing the seal 200 from moving toward the second position. Therefore, the workload of the driving assembly 300 can be greatly reduced.

[0051] It should be understood that the locking assembly 400 locks the seal 200 and keeps the seal 200 in the first position. At this time, the first drive cylinder 310 can continue to be in a working state, that is, the external equipment continues to replenish the pressure of the chamber of the first drive cylinder 310 to maintain a constant pressure; it can also be in a standby state, that is, the pressure in the chamber inside the first drive cylinder 310 is prevented from being released by closing the connecting pipeline.

[0052] When the vacuum environment needs to be broken, the first drive cylinder 310 does not need to drive the seal 200 to move from the first position to the second position. It only needs to unlock the locking assembly 400, and the atmospheric pressure acting on the seal 200 will naturally push the seal 200 to the second position.

[0053] It can be understood that when the driving assembly 300 includes a first driving cylinder 310 and is inserted with a first piston rod 320, the first piston rod 320 can be configured to pass through the first driving cylinder 310, and the end of the first piston rod 320 away from the seal 200 is a locking end, and the locking end is transmission-connected to the locking assembly 400.

[0054] It should be understood that the locking assembly 400 is transmission-connected to the locking end of the first piston rod 320 to achieve locking of the seal 200, that is, the locking assembly 400 is indirectly connected to the seal 200 through the first piston rod 320, which should also be understood as a way of transmission connection between the locking assembly 400 and the seal 200.

[0055] When the atmospheric pressure acts on the seal 200 and pushes the seal 200 to move toward the second position, the seal 200 will synchronously drive the first piston rod 320 connected thereto to move in the first drive cylinder 310. It should be understood that, whether the first drive cylinder 310 is a hydraulic cylinder or a pneumatic cylinder, when the vacuum environment is broken, after the locking assembly 400 is unlocked, the movement of the first piston rod 320 is not rapid. The first piston rod 320 is hindered by the liquid or gas in the first drive cylinder 310 and moves relatively slowly, which can be understood as having a damping effect. Therefore, after the locking assembly 400 is unlocked, the seal 200 cannot quickly open a large channel, but gradually and slowly opens the channel, which can reduce the speed at which the external air flows into the vacuum area, reduce the possibility of collision between the air flow and other air or objects in the vacuum area, and reduce the generation of noise. In addition, because the gas or liquid in the first drive cylinder 310 slows down the movement speed of the first piston rod 320, the force of atmospheric pressure acting on the seal 200 is resolved, avoiding the first piston rod 320 from moving quickly to the end of the first drive cylinder 310 and colliding with the first drive cylinder 310, thereby extending the service life of the drive assembly 300.

[0056] Reference Figure 5 and Figure 6As shown, it can be understood that the locking assembly 400 includes a first sleeve 410 and a locking rod 430. The axis of the first sleeve 410 is parallel to the first direction. The locking rod 430 is connected to the sealing member 200. The locking rod 430 is disposed in the first sleeve 410. The side wall of the first sleeve 410 is provided with a first guide groove 411 along the axial direction of the first sleeve 410. A locking groove 412 is provided at one end of the first guide groove 411. The locking groove 412 is perpendicular to the first guide groove 411 and is interconnected. The locking rod 430 passes through the first guide groove 411 and can move along the first guide groove 411. The first sleeve 410 is connected to a rotation drive assembly 500. The rotation drive assembly 500 can drive the first sleeve 410 to rotate to a locked state or an unlocked state. When the first sleeve 410 is in the locked state, the locking rod 430 is located in the locking groove 412. When the first sleeve 410 is in the unlocked state, the locking rod 430 is located in the first guide groove 411.

[0057] In the unlocked state, the locking rod 430 passes through the first guide groove 411 and moves along the first guide groove 411. When the seal 200 moves to the first position, the locking rod 430 just moves to the intersection of the first guide groove 411 and the locking groove 412. At this time, the first sleeve 410 rotates, and the locking rod 430 can be moved into the locking groove 412. The locking rod 430 can no longer move along the first guide groove 411, that is, the seal 200 is locked and cannot move in the first direction.

[0058] Furthermore, in order to prevent the locking rod 430 from rotating around the first sleeve 410 due to other reasons and causing structural failure, the locking assembly 400 further includes a second sleeve 420, which is sleeved outside the first sleeve 410, and a second guide groove 421 is provided on the side wall of the second sleeve 420 along the axial direction of the second sleeve 420, and the locking rod 430 also passes through the second guide groove 421. When the first sleeve 410 is in a locked state, the first guide groove 411 is misaligned with the second guide groove 421, and when the first sleeve 410 is in an unlocked state, the orthographic projections of the first guide groove 411 and the second guide groove 421 on the longitudinal section of the first sleeve 410 coincide. The longitudinal section of the first sleeve 410 refers to a section parallel to the axis of the first sleeve 410.

[0059] The second sleeve 420 is relatively stationary and does not rotate circumferentially. The locking rod 430 always passes through the second guide groove 421 and is restricted to move only in the first direction or the second direction.

[0060] In the above structure, the driving assembly 300 is combined with the first driving cylinder 310, and the first piston rod 320 is arranged to penetrate the first driving cylinder 310. When the first sleeve 410 is in the unlocked state, the locking rod 430 can pass through the second guide groove 421 and the first guide groove 411 and move along the guide grooves. When the first driving cylinder 310 drives the sealing member 200 to move to the first position, the movement of the first piston rod 320 just places the locking rod 430 at the intersection of the first guide groove 411 and the locking groove 412. At this time, as long as the first sleeve 410 rotates, the locking rod 430 can continue to remain in the locking groove 412 and the second guide groove 421, but the first guide groove 411 is misaligned with the second guide groove 421, so the locking rod 430 cannot continue to move along the second guide groove 421, that is, the first piston rod 320 cannot move, and the sealing member 200 is locked in the first position.

[0061] When unlocking is required, the first sleeve 410 rotates in the opposite direction so that the positive projections of the first guide groove 411 and the second guide groove 421 on the longitudinal section of the first sleeve 410 overlap again, and the locking rod 430 can move along the second guide groove 421 and the first guide groove 411, and the seal 200 can move from the first position to the second position.

[0062] It can be understood that the rotation drive assembly 500 includes a second drive cylinder 510 and a crank rod 520, the second drive cylinder 510 is inserted with a second piston rod 511, one end of the crank rod 520 is connected to the first sleeve 410, and the other end of the crank rod 520 is connected to the end of the second piston rod 511, and the moving path of the second piston rod 511 does not pass through the rotation center of the first sleeve 410.

[0063] When the second driving cylinder 510 drives the second piston rod 511 to push the crank rod 520 to move, since the moving path of the second piston rod 511 does not pass through the rotation center of the first sleeve 410, the crank rod 520 will drive the first sleeve 410 to rotate, realizing the function of rotational drive.

[0064] It should be understood that both the first driving cylinder 310 and the second driving cylinder 510 can be driven by air cylinders or hydraulically.

[0065] A vacuum flushing system according to an embodiment of the present invention is provided with the above-mentioned opening and closing device of the vacuum flushing system.

[0066] The base is used to be connected to the top of the flushing pool. Specifically, the base is provided with a first sealing surface, which fits the outer wall of the flushing pool and completes the seal, so that the flushing pool can be connected to the external environment through the pressure relief channel. The base is also provided with an air extraction channel, and the other end of the air extraction channel is used to connect to an evacuation device, such as a vacuum pump, to reduce the air pressure in the flushing pool. The water in the pool is driven by the atmospheric pressure to move toward the flushing pool and reach the target water level. During the vacuuming process, the seal is in a position to close the pressure relief channel.

[0067] It should be understood that before vacuuming, the opening and closing device of the vacuum flushing system may have been opened once, and the seal may not have closed the pressure relief channel. At this time, the driving assembly is required to drive the seal to move to the first position, close the pressure relief channel, and then the flushing pool can be vacuumed through the vacuum channel.

[0068] It should be understood that the base is installed at the top of the flushing tank, so the first sealing surface is facing downward. After the flushing tank is evacuated, the seal is subjected to atmospheric pressure, which drives the seal to move toward the second position inside the flushing tank, so the locking assembly acts on the seal to keep the seal in the first position and close the pressure relief channel.

[0069] When it is necessary to destroy the vacuum environment and perform flushing operations, it is only necessary to unlock the locking assembly, and the seal will be affected by the atmospheric pressure, pushing the seal to move to the second position toward the inside of the flushing tank, that is, opening the pressure relief channel. In the above process, there is no need to apply power to the seal to overcome the atmospheric pressure, so the force required to open the pressure relief channel under vacuum is smaller, and it is only necessary to drive the locking assembly to unlock. At the same time, the seal moves toward the inside of the flushing tank without overcoming the negative pressure, which can better control the movement of the seal, effectively reduce the intensity of external air flowing into the vacuum area, and reduce noise.

[0070] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An opening and closing device for a vacuum flushing system, used to cooperate with the opening and closing of a connecting port of a water storage container, characterized in that: include: A base (100), the base (100) being provided with a first sealing surface (101), the first sealing surface (101) being used for sealingly being arranged around the connecting port, the base (100) being further provided with an air extraction channel (110) and a pressure relief channel (120), the air extraction channel (110) and the pressure relief channel (120) both penetrating the first sealing surface (101); Seal (200); A drive assembly (300), the drive assembly (300) being transmission-connected to the seal (200), the drive assembly (300) being capable of exerting an action along a first direction on the seal (200) so as to drive the seal (200) to move from a first position to a second position, and the drive assembly (300) being capable of exerting an action along a second direction on the seal (200) so as to drive the seal (200) to move from the second position to the first position, wherein when the seal (200) is in the first position, the seal (200) closes the pressure relief channel (120), and when the seal (200) is in the second position, the seal (200) opens the pressure relief channel (120), the first direction being a direction from a normal pressure side to a negative pressure side, and the second direction being opposite to the first direction.

2. The opening and closing device of the vacuum flushing system according to claim 1, characterized in that: The first sealing surface (101) is provided with an annular boss (130), and a first sealing ring (140) is provided on one side of the annular boss (130), the first sealing ring (140) protruding from the surface of the annular boss (130).

3. The opening and closing device of the vacuum flushing system according to claim 1, characterized in that: The port of the pressure relief channel (120) located on the first sealing surface (101) is defined as a pressure relief port, and the sealing member (200) is in the first position, and the sealing member (200) covers and seals the pressure relief port.

4. The opening and closing device of the vacuum flushing system according to claim 1, characterized in that: The base (100) is provided with a plurality of the air extraction channels (110), the plurality of the air extraction channels (110) being arranged around the pressure relief channel (120), the base (100) is provided with a connecting cavity (150), the connecting cavity (150) being in communication with the plurality of the air extraction channels (110), and the base (100) is provided with an interface (160), the interface (160) being in communication with the connecting cavity (150).

5. The opening and closing device of the vacuum flushing system according to claim 1, characterized in that: The driving assembly (300) comprises a first driving cylinder (310), wherein the first driving cylinder (310) is inserted with a first piston rod (320), one end of the first piston rod (320) extends to the outside of the first driving cylinder (310), the first driving cylinder (310) is used to push the first piston rod (320) to move, and the end of the first piston rod (320) located outside the first driving cylinder (310) is connected to the sealing element (200).

6. The opening and closing device of the vacuum flushing system according to claim 1, characterized in that: It also comprises a locking assembly (400), the locking assembly (400) being connected to the sealing member (200), the locking assembly (400) having a locking state and an unlocking state, and in the locking state, the locking assembly (400) prevents the sealing member (200) from moving.

7. The opening and closing device of the vacuum flushing system according to claim 6, characterized in that: The locking assembly (400) comprises a first sleeve (410) and a locking rod (430); the axis of the first sleeve (410) is parallel to the first direction; the locking rod (430) is connected to the sealing element (200); the locking rod (430) is disposed in the first sleeve (410); a first guide groove (411) is provided on the side wall of the first sleeve (410) along the axial direction of the first sleeve (410); a locking groove (412) is provided at one end of the first guide groove (411); the locking groove (412) is perpendicular to the first guide groove (411) and is in communication with each other. The locking rod (430) passes through the first guide groove (411) and is movable along the first guide groove (411); the first sleeve (410) is connected to a rotation drive assembly (500); the rotation drive assembly (500) is capable of driving the first sleeve (410) to rotate to the locked state or the unlocked state; when the first sleeve (410) is in the locked state, the locking rod (430) is located in the locking groove (412); when the first sleeve (410) is in the unlocked state, the locking rod (430) is located in the first guide groove (411).

8. The opening and closing device of the vacuum flushing system according to claim 7, characterized in that: The locking assembly (400) further comprises a second sleeve (420), the second sleeve (420) being sleeved outside the first sleeve (410), the side wall of the second sleeve (420) being provided with a second guide groove (421) along the axial direction of the second sleeve (420), the locking rod (430) also passing through the second guide groove (421), when the first sleeve (410) is in the locked state, the first guide groove (411) and the second guide groove (421) are misaligned, and when the first sleeve (410) is in the unlocked state, the orthographic projections of the first guide groove (411) and the second guide groove (421) on the longitudinal section of the first sleeve (410) coincide.

9. The opening and closing device of the vacuum flushing system according to claim 7, characterized in that: The rotary drive assembly (500) comprises a second drive cylinder (510) and a crank rod (520), wherein the second drive cylinder (510) is inserted with a second piston rod (511), one end of the crank rod (520) is connected to the first sleeve (410), and the other end of the crank rod (520) is connected to the end of the second piston rod (511), and the moving path of the second piston rod (511) does not pass through the rotation center of the first sleeve (410).

10. A vacuum flushing system, characterized in that: The vacuum flushing system is equipped with an opening and closing device of the vacuum flushing system according to any one of claims 1 to 9.

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