Mute self-suction device with stable performance

Abstract

The invention relates to the technical field of self-suction drainage, in particular to a silent self-suction device stable in performance, which comprises a water suction pipe, a shut-off valve mounted on the water suction pipe and a control mechanism used for controlling the shut-off valve to open and close, and the lower end of the water suction pipe is inserted into a well main body. The control mechanism ascends and descends along with the liquid level in the well body and is in linkage with the shut-off valve. The shut-off valve is installed on the water suction pipe, the control mechanism controls opening and closing of the shut-off valve along with the water level in the well body, and a diaphragm valve can be omitted, so that various common faults of the diaphragm valve can be effectively avoided, and the overall use and maintenance cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of self-priming drainage technology, and in particular to a silent self-priming device with stable performance. Background Art

[0002] Self-priming drainage technology usually refers to the process of forming a gradient pressure difference in the self-priming pipe so that the fluid flows in the direction of reduced pressure. In terms of construction technology, self-priming drainage technology is often used in tunnel multi-point self-priming drainage systems to suck out the collected water in the tunnel to maintain safe passage in the tunnel. The shut-off valve is controlled by a control mechanism. When the shut-off valve is opened, the fluid enters the self-priming pipe under the action of the pressure difference and flows in the direction of reduced pressure, thereby achieving drainage.

[0003] The outdoor multi-point self-priming drainage technology uses pipelines to connect low-pressure sources to enable the pipelines to have self-priming capabilities, and the diaphragm valve installed at the end of the self-priming pipeline and the on-off valve drive mechanism that controls the opening and closing of the diaphragm valve are used to realize the opening and closing of the normal pressure fluid and the self-priming pipeline. When the diaphragm valve is opened, the normal pressure fluid and the self-priming pipeline are connected, and the fluid enters the pipeline under the action of the self-priming force and flows in the direction of pressure reduction. When the fluid is discharged, the diaphragm valve is closed under the action of the on-off valve drive mechanism to achieve the isolation of the self-priming pipeline and the normal pressure fluid.

[0004] In actual use, it is found that after the diaphragm valve is applied to the self-priming drainage system, the upper cavity of the diaphragm valve is connected to the self-priming pipe network with high air humidity, causing the spring in the cavity to always be in a humid environment, and in some operating sites, the cavity is even filled with water, causing the spring to rust. Over time, the failure rate of the diaphragm valve remains high; in addition, the pressure value of the self-priming pipeline rises rapidly due to the large amount of fluid entering the low-pressure pipeline, causing the differential pressure that drives the diaphragm valve to open to decrease rapidly, causing the diaphragm valve to close. After the diaphragm valve is closed, its top cavity is connected to the low-pressure pipeline again, and the diaphragm valve opens again under the drive of the pressure difference until the drainage is completed. In this process, the time interval between the opening and closing of the diaphragm valve is usually less than 1s. The frequent opening and closing of the diaphragm valve causes the diaphragm to be easily damaged and induces failures. Summary of the invention

[0005] In order to reduce the maintenance cost of the self-priming drainage system, the present application provides a silent self-priming device with stable performance, which eliminates the need for a diaphragm valve and reduces the failure rate.

[0006] The present application provides a stable performance silent self-priming device adopts the following technical solution: A silent self-priming device with stable performance includes a water suction pipe, a shut-off valve installed on the water suction pipe, and a control mechanism for controlling the opening and closing of the shut-off valve. The lower end of the water suction pipe is inserted into a well body, and the control mechanism follows the rise and fall of the liquid level in the well body and is linked with the shut-off valve.

[0007] By adopting the above technical solution, a shut-off valve is installed on the suction pipe, and the control mechanism controls the opening and closing of the shut-off valve according to the water level in the well body, thereby controlling the drainage of the self-priming drainage system. The overall structure omits the diaphragm valve structure, thereby effectively avoiding the failure of the diaphragm valve, reducing the overall failure rate, and reducing the cost of use.

[0008] Optionally, the control mechanism includes a guide component and a float that follows the rise and fall of the water level, and the guide component connects the float and the shut-off valve and guides the rising and falling movement of the float.

[0009] By adopting the above technical solution, a float and a guide component are set, and the shut-off valve can be triggered to open and close as the float follows the rise and fall of the water level; at the same time, the guide component can guide the rise and fall of the float, thereby improving the accuracy of the float triggering the shut-off valve.

[0010] The optional guide assembly includes a guide tube and a guide rod slidably inserted into the guide tube, the guide tube is vertically fixed in the well body, and the float is connected to the guide rod; the guide rod is connected to the shut-off valve, and the float drives the guide rod to follow the rise and fall of the water level.

[0011] By adopting the above technical solution, a guide tube and a guide rod are provided, and the float is connected to the guide rod. During normal working, the float floats on the water surface and follows the rise and fall of the water level in the well body. When the water level rises, the float drives the guide rod to rise, and the guide rod drives the shut-off valve to open, and the system pumps out the water in the well body. When the water level drops as the system continues to pump out water, the float drives the guide rod to move downward, and the guide rod gradually closes the shut-off valve.

[0012] Optionally, the guide assembly includes a guide sleeve and a guide rod, the float is connected to the guide rod, the guide sleeve is vertically fixed in the well body, and the float slides in the guide sleeve; the guide rod is connected to the shut-off valve, and the float drives the guide rod to follow the rise and fall of the water level.

[0013] By adopting the above technical solution, a guide sleeve is fixed in the well body, and the lifting and lowering movement of the float is guided by the guide sleeve. During the lifting process, the float will drive the guide rod to move up and down, and the guide rod will trigger the shut-off valve and control the opening and closing of the shut-off valve.

[0014] Optionally, the control mechanism also includes a control box arranged in the well body, the shut-off valve is located in the control box, and the control end of the shut-off valve is set as a driving gear; a driving rack is fixed to the upper end of the guide rod along the length direction, and the driving rack is meshed with the driving gear.

[0015] By adopting the above technical solution, the driving gear and the driving rack are arranged in the control box, and the control box can protect the driving gear and the driving rack to increase their service life; and when the guide rod rises and falls with the water level, the driving rack drives the driving gear to rotate, thereby controlling the opening and closing of the shut-off valve.

[0016] Optionally, a pulley is installed at a position in the control box corresponding to the driving rack, and a side wall of the driving rack is in contact with the pulley.

[0017] By adopting the above technical solution, a pulley is arranged at the installation position of the drive rack in the control box, which can effectively reduce the resistance of the drive rack during sliding and improve the flexibility of opening and closing the shut-off valve.

[0018] Optionally, the float is fixed on the guide rod.

[0019] By adopting the above technical solution, the float will drive the guide rod to move together with the float as the water level rises and falls.

[0020] Optionally, the float is slidably disposed on the guide rod, an upper limit plate and a lower limit plate are fixed on the guide rod, and the float slides between the upper limit plate and the lower limit plate.

[0021] By adopting the above technical scheme, the float is slidably set on the guide rod. When the water level gradually rises, the float rises with the water level, but the guide rod does not move, and the shut-off valve is not opened at this time; when the float rises with the water level to the upper limit plate, the float will push the upper limit plate to move the guide rod upward to open the shut-off valve; after the shut-off valve is opened, the water level discharged from the water cup in the well body gradually decreases, but since the opening and closing of the shut-off valve has a certain resistance, the shut-off valve is in the original position and remains open at this time; when the water level drops to the point where the float contacts the lower limit plate, the water level continues to drop, and the float will drive the guide rod to move downward to close the shut-off valve; the threshold for opening the shut-off valve can be effectively reduced, the frequency of opening and closing the shut-off valve can be reduced, and the overall service life can be improved.

[0022] Optionally, a counterweight is fixed on the floating body.

[0023] By adopting the above technical solution, a counterweight is fixed on the float, and the gravity of the float is increased by the counterweight, thereby overcoming the resistance required for closing the shut-off valve, so that the shut-off valve can be closed in time.

[0024] Optionally, a locking mechanism for locking the guide rod is provided in the control box, and the locking mechanism includes a locking assembly and a trigger assembly; the locking assembly includes a locking plate, a first elastic member and a lock box fixed in the control box, the guide rod passes through the lock box and slidably cooperates with the lock box; the locking plate slides in the lock box along a length direction perpendicular to the guide rod, a card slot is provided on the locking plate, the guide rod is inserted in the card slot, and the outline size of the card slot is larger than the cross-sectional outline size of the guide rod; a locking slot is provided on the side wall of the guide rod, the first elastic member is located at one end of the locking plate, and the first elastic member pushes the locking plate to be inserted in the lock slot; the trigger assembly includes a float, and the float is located above the float. When the water level in the upper well main body rises, the trigger assembly pushes the locking plate to one side of the first elastic member; when the water level drops, the first elastic member pushes the locking plate to reset.

[0025] By adopting the above technical solution, a locking mechanism is set in the control box. During normal operation, the water level in the well body continues to rise, but since the locking plate jams the guide rod, the float will not drive the guide rod to move upward; when the water level continues to rise to the float position, the water level drives the float to trigger the locking plate and push the locking plate to the side of the first elastic member, so that the locking plate is disengaged from the locking groove of the guide rod. At this time, the guide rod moves upward under the buoyancy of the float to open the shut-off valve, and the system discharges the water in the well body; when the water level gradually drops, the float drives the guide rod to descend and gradually close the shut-off valve. At the same time, the float also gradually drops with the water level. The first elastic member pushes the locking plate to close the guide rod. When the guide rod drops to the point where the locking groove is flush with the locking plate, the locking plate is inserted into the locking groove to lock the position of the guide rod.

[0026] Optionally, a button for pushing the locking plate to slide is slidably provided on the lock box, the button is located at an end of the locking plate away from the first elastic member, and the button is linked to the float.

[0027] By adopting the above technical solution, the provision of a button can facilitate the trigger component to push the lock plate from the outside of the lock box.

[0028] Optionally, the trigger assembly also includes a trigger rod and a control rod; the trigger rod is rotatably fixed in the control box and is located on a side of the lock box close to the button; the control rod is connected to an end of the trigger rod away from the button, and the float is connected to an end of the control rod away from the trigger rod, and the control rod extends the float to below the water inlet of the well body; when the water level in the well body rises to lift the float, the trigger rod rotates and pushes the button.

[0029] By adopting the above technical solution, the control rod extends the float to the bottom of the water inlet, which can effectively increase the threshold for opening the shut-off valve and effectively reduce the valve opening frequency; and the control rod can extend the force arm of the float rotation trigger rod, thereby accurately triggering the locking assembly.

[0030] Optionally, a second elastic member is further provided in the lock box, and the second elastic member is sleeved on the guide rod. A clamping ring is fixed on the guide rod below the lock groove, and two ends of the second elastic member respectively abut against the clamping ring and the bottom of the lock box.

[0031] By adopting the above technical solution, a second elastic member is arranged on the guide rod. When the water level rises, the second elastic member can increase the upward thrust of the guide rod, so that the guide rod can quickly break away from the locking plate to open the shut-off valve.

[0032] Optionally, the driving end of the shut-off valve is configured as a handle, and the guide rod is slidably connected to the handle.

[0033] By adopting the above technical solution, the driving end of the shut-off valve is set as a handle, and the guide rod is slidably connected to the handle. When the guide rod moves up and down with the water level, the guide rod drives the handle to rotate to control the opening and closing of the shut-off valve.

[0034] Optionally, a toggle ring is provided in the control box, and the toggle ring is fixed on the guide rod and sleeved on the handle.

[0035] By adopting the above technical solution, a toggle ring is fixed on the guide rod. When the guide rod is raised or lowered, the toggle ring will push the handle to rotate, thereby controlling the opening and closing of the shut-off valve.

[0036] Optionally, a slide groove is provided on the handle along the length direction, and a shift rod is fixed to the guide rod, and the shift rod is slidably connected in the slide groove.

[0037] By adopting the above technical solution, a slide groove is opened on the handle, and a lever is arranged on the guide rod. During the lifting and lowering process of the guide rod, the lever will slide in the slide groove and drive the handle to rotate, thereby controlling the opening and closing of the shut-off valve.

[0038] Optionally, it also includes an air intake mechanism, which includes an air intake pipe connected to the water suction pipe, and a throttle valve for controlling the air intake amount of the air intake pipe, and the air intake pipe is connected to the water suction pipe; when the water suction pipe pumps water outward, the air intake pipe introduces a constant amount of air into the water suction pipe.

[0039] By adopting the above technical solution and setting an air intake mechanism, when the water level in the well body rises, the water is discharged to the outside through the suction pipe. At the same time, the throttle valve controls the air intake pipe to allow a constant amount of air to pass into the drainage pipe, so that a water-gas mixture is formed in the drainage pipe. This can effectively reduce the density of the sewage, thereby increasing the head, and further reducing the selection of the vacuum pump for the self-priming pipe network and reducing costs.

[0040] Optionally, the air intake mechanism further comprises a control valve connected to the air intake pipe, and the control valve controls the on-off of the air intake pipe; when the water suction pipe pumps water outward, the control valve opens, and when the water suction pipe stops pumping water, the control valve closes.

[0041] By adopting the above technical solution, a control valve is set on the air inlet pipe, and the air inlet pipe is controlled by the control valve to prevent the air inlet pipe from taking in a large amount of air into the water suction pipe in the initial stage of pumping water, causing the water suction pipe to be unable to pump water.

[0042] Optionally, the control valve is configured as a float valve, and the control valve is fixed on a water suction pipe; when the water level in the well body rises and submerges the control valve, the control valve opens, and the air inlet pipe lets air into the water suction pipe; when the water level drops below the control valve, the control valve closes.

[0043] By adopting the above technical solution, the control valve is set as a float valve. When the water level in the well body rises to submerge the control valve, the control valve is opened under the drive of the float, and the air inlet pipe supplies air to the suction pipe; when the water level drops to below the control valve, the float position drops, thereby closing the air inlet pipe.

[0044] In summary, the present application includes at least one of the following beneficial technical effects: 1. By installing a shut-off valve on the suction pipe, the control mechanism controls the opening and closing of the shut-off valve according to the water level in the well body, thereby controlling the drainage of the self-priming drainage system. The overall structure omits the diaphragm valve structure, which can effectively avoid the failure of the diaphragm valve, reduce the overall failure rate, and reduce the cost of use; 2. By setting a guide tube and a guide rod, and setting a float on the guide rod, during normal operation, the float floats on the water surface and follows the rise and fall of the water level in the well body. When the water level rises, the float drives the guide rod to rise, thereby opening the shut-off valve, and the system pumps out the water in the well body. When the water level drops as the system continues to pump out, the float drives the guide rod to move downward, thereby gradually closing the shut-off valve; 3. By sliding the float on the guide rod, when the water level gradually rises, the float rises with the water level, but the guide rod does not move, and the shut-off valve is not opened at this time. When the float rises with the water level to the upper limit plate, the float will push the upper limit plate, causing the guide rod to move up to open the shut-off valve. After the shut-off valve is opened, the water level discharged from the water cup in the well body gradually decreases, but since the opening and closing of the shut-off valve has a certain resistance, the shut-off valve remains in the original position and remains open. When the water level drops to the point where the float contacts the lower limit plate, the water level continues to drop, and the float will drive the guide rod to move down to close the shut-off valve, which can effectively reduce the threshold for opening the shut-off valve and reduce the frequency of opening and closing the shut-off valve, thereby increasing the overall service life. 4. By setting a locking mechanism in the control box, during normal operation, the water level in the well body continues to rise, but because the locking plate blocks the guide rod, the float will not drive the guide rod to move up. When the water level continues to rise to the float position, the water level drives the float to rise, thereby driving the lever to rotate, and the locking plate is moved to the side of the first elastic member, so that the locking plate is disengaged from the locking groove of the guide rod. At this time, the guide rod moves upward under the buoyancy of the floating body to open the shut-off valve, and the system discharges the water in the well body. When the water level gradually drops, the floating body drives the guide rod to drop and gradually close the shut-off valve. At the same time, the float also gradually drops with the water level. The first elastic member pushes the locking plate to close the guide rod. When the guide rod drops to the point where the locking groove is flush with the locking plate, the locking plate is inserted into the locking groove to lock the position of the guide rod. 5. By setting up the air intake mechanism, when the water level in the well body rises, the water suction pipe will drain the water to the outside, and at the same time the control valve will open to introduce a constant amount of air into the drainage pipe, so that a water-gas mixture will be formed in the drainage pipe, which can effectively reduce the density of the sewage, thereby increasing the head, and then reducing the vacuum pump selection of the self-priming pipe network and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 It is a schematic diagram of the overall structure of Example 2 of the present application; Figure 3 It is a schematic diagram of the overall structure of Example 3 of the present application; Figure 4 is a working schematic diagram a of Example 3 of the present application; Figure 5 is a working schematic diagram b of Example 3 of the present application; Figure 6 is a working schematic diagram c of Example 3 of the present application; Figure 7 is a working schematic diagram d of Example 3 of the present application; Figure 8 It is a schematic diagram of the overall structure of Example 4 of the present application; Fig. 9yes Figure 8 Magnified view of area A in the middle; Fig.10 is a schematic diagram of the structure of Example 5 of the present application; Fig.11 is a structural schematic diagram of a prominent slide groove and a lever in Example 5 of the present application; Fig.12 is a schematic diagram of the structure of Example 6 of the present application; Fig.13 It is a structural diagram of Example 7 of the present application.

[0046] Reference numerals: 01, well body; 011, water inlet; 02, wellbore; 03, well cover; 1, water suction pipe; 11, control valve; 12, pressure gauge; 13, drain outlet; 2, shut-off valve; 21, driving gear; 22, handle; 221, slideway; 3, control mechanism; 31, guide tube; 32, guide rod; 321, upper limit plate; 322, lower limit plate; 323, lock groove; 324, snap ring; 325, toggle ring; 326, lever; 33, float; 331, counterweight; 34, control box; 35, drive rack; 36, pulley; 37, guide sleeve; 4, locking mechanism; 41, locking plate; 411, slot; 42, trigger rod; 43, lock box; 44, first elastic member; 45, button; 46, float; 47, control rod; 48, second elastic member; 5, air intake mechanism; 51, air intake pipe; 52, throttle valve; 53, control valve. DETAILED DESCRIPTION

[0047] Embodiment 1: Example 1 of the present application discloses a silent self-priming device with stable performance, referring to Figure 1 , including a water suction pipe 1, a shut-off valve 2 and a control mechanism 3 for controlling the opening and closing of the shut-off valve 2; a well body 01 is installed at the construction position, a well shaft 02 is fixed at the upper end of the well body 01, a well cover 03 is provided on the upper end cover of the well shaft 02, and a water inlet 011 is provided on the side wall at the upper end of the well body 01; the water suction pipe 1 is vertically fixed in the well body 01, the shut-off valve 2 is installed in series on the water suction pipe 1, and the control mechanism 3 can control the opening and closing of the shut-off valve 2 following the rise and fall of the water level in the well body 01; when the water level rises, the control mechanism 3 opens the shut-off valve 2, and the system discharges the water in the well body 01, and when the water level drops, the control mechanism 3 closes the shut-off valve 2, and the system stops draining water.

[0048] The control mechanism 3 includes a guide assembly, which includes a guide tube 31, a guide rod 32 and a float 33 for fixing the end of the guide rod 32. The guide tube 31 is vertically fixed in the well body 01 on one side of the water suction pipe 1; the guide rod 32 is slidably inserted into the guide tube 31, the upper end of the guide rod 32 is linked to the shut-off valve 2, and the float 33 is fixed to the lower end of the guide rod 32.

[0049] The control mechanism 3 also includes a control box 34, which is fixed in the well body 01, and the suction pipe 1 runs through the control box 34 and the shut-off valve 2 is located in the control box 34. The shut-off valve 2 is set as a ball valve, and the control end of the shut-off valve 2 is set as a driving gear 21; the edge of the ball center of the shut-off valve 2 is set as a sharp knife edge, which can cut off the blockage in the valve during the closing process to prevent the valve from closing tightly. The guide pipe 31 is fixed on the lower side of the control box 34 and is connected to the inside of the control box 34. A driving rack 35 is fixed on the upper end of the guide rod 32 along the length direction, and the driving rack 35 is meshed with the driving gear 21. When the water level in the well body 01 rises, the water level drives the float 33 to float upward, so that the guide rod 32 moves upward and drives the shut-off valve 2 to open, and the system discharges the water in the well body 01.

[0050] A counterweight 331 is fixed on the float 33. When the water level in the well body 01 drops, the float 33 drives the guide rod 32 to close the shut-off valve 2 as the water level drops, and the system stops draining water. A plurality of pulleys 36 are installed in the control box 34 at positions corresponding to the drive rack 35. The side wall of the drive rack 35 fits the pulley 36, which can effectively reduce the resistance of the drive rack 35 to slide.

[0051] A control valve 11 is installed in series on the suction pipe 1 at one end of the shutoff valve 2 near the drain port 13. The control valve 11 can manually control the opening and closing of the suction pipe 1, thereby controlling the opening and closing of the system. A pressure gauge 12 is installed on the suction pipe 1 between the control valve 11 and the shutoff valve 2. The staff can monitor the pressure changes in the suction pipe 1 in real time according to the pressure gauge 12 to prevent blockage in the suction pipe 1.

[0052] The implementation principle of a silent self-priming device with stable performance disclosed in Example 1 of the present application is: by setting a shut-off valve 2 on the water suction pipe 1, the control mechanism 3 controls the opening and closing of the shut-off valve 2 according to the water level changes in the well body 01, thereby controlling the operation of the self-priming drainage system. The overall structure is simple and can effectively reduce the failure rate of the system.

[0053] Embodiment 2: The difference between Example 2 of the present application and Example 1 is that, referring to Figure 2 The guide assembly includes a guide sleeve 37 and a guide rod 32. The guide sleeve 37 is vertically fixed in the well body 01. The float 33 slides in the guide sleeve 37 along the axial direction of the guide sleeve 37. The guide rod 32 is coaxially installed in the guide sleeve 37. The float 33 is fixed at the lower end of the guide rod 32. The upper end of the guide rod 32 is connected to the driving rack 35.

[0054] When the water level in the well body 01 rises, the float 33 floats up along the guide sleeve 37 and drives the guide rod 32 to move upward, and the guide rod 32 drives the drive rack 35 to drive the shut-off valve 2 to open and drain water to the outside.

[0055] Embodiment 3: The difference between Example 3 of the present application and Example 1 is that, referring to Figure 3 The float 33 is slidably arranged on the guide rod 32. The float 33 and the counterweight 331 are coaxially sleeved on the outside of the guide rod 32 and slidably cooperate with the guide rod 32; an upper limit plate 321 is fixed in the middle of the guide rod 32, and a lower limit plate 322 is fixed at the lower end of the guide rod 32, and the float 33 slides between the upper limit plate 321 and the lower limit plate 322.

[0056] Reference Figure 4 In the free state, the float 33 is placed on the lower limit plate 322 under the action of the counterweight block 331. Here, the guide rod 32 is at the lower dead point position driven by the float 33 and the counterweight block 331, and the shut-off valve 2 is closed.

[0057] Reference Figure 5 When the water level in the well body 01 gradually rises, the float 33 gradually rises to the upper limit plate 321 driven by the water level. During this stroke of the float 33, the guide rod 32 does not move.

[0058] Reference Figure 6 As the water level in the well body 01 continues to rise, the water level drives the float 33 to continue to float up. At this time, the float 33 drives the guide rod 32 to move up against the upper limit plate 321. At the same time, the guide rod 32 gradually opens the shut-off valve 2, and the system discharges the water in the well body 01 to the outside; when the float 33 drives the guide rod 32 to move up to the upper limit plate 321 and abuts the guide pipe 31, the shut-off valve 2 is fully opened.

[0059] Reference Figure 7 After the shut-off valve 2 is fully opened, the water level in the well body 01 begins to drop. However, due to a certain resistance in the opening and closing of the shut-off valve 2, the position of the guide rod 32 remains unchanged and the shut-off valve 2 is still in an open state. At this time, the float 33 slides downward on the guide rod 32 until the float 33 contacts the lower limit plate 322. Under the gravity of the counterweight block 331, the float 33 pulls the guide rod 32 downward, gradually closing the shut-off valve 2.

[0060] The implementation principle of Example 3 of the present application is as follows: by sliding the float 33 and the counterweight block 331 on the guide rod 32, the shut-off valve 2 will be opened to drain water only when the float 33 floats up with the water level to push the upper limit plate 321 upward; when the water level drops to the lowest level, the float 33 and the counterweight block 331 will pull the guide rod 32 to close the shut-off valve 2; the threshold for opening the shut-off valve 2 can be effectively increased, so that the shut-off valve 2 will not be frequently opened or closed when the water level changes slightly, which can effectively extend the overall service life and reduce the failure rate.

[0061] Embodiment 4: The difference between Example 4 of the present application and Example 1 is that, referring to Figure 8 and Fig. 9 A locking mechanism 4 for locking the guide rod 32 is provided in the control box 34, and the locking mechanism 4 includes a locking assembly and a trigger assembly. The locking assembly includes a locking plate 41, a first elastic member 44, and a lock box 43 fixed in the control box 34, and the guide rod 32 passes through the lock box 43 and slidably cooperates with the lock box 43; a card slot 411 is provided through the locking plate 41, and the outline size of the card slot 411 is larger than the cross-sectional outline size of the guide rod 32, and the guide rod 32 is vertically inserted into the card slot 411 of the locking plate 41; a locking slot 323 is provided on the side wall of the guide rod 32, and the locking plate 41 is slidably installed in the lock box 43 along a direction perpendicular to the guide rod 32; the first elastic member 44 is configured as a compression spring, and the first elastic member 44 is located at one end of the locking plate 41, and pushes the locking plate 41 into the locking slot 323. A button 45 is slidably mounted on the side wall of the lock box 43, and the button 45 displaces the lock plate 41 away from one end of the first elastic member 44, and the sliding direction of the button 45 is consistent with that of the lock plate 41. The trigger assembly can push the button 45 following the rise and fall of the liquid level in the well body 01.

[0062] The trigger assembly includes a trigger rod 42, a control rod 47 and a float 46 fixed to the end of the control rod 47. The trigger rod 42 is rotatably fixed in the control box 34, and the trigger rod 42 is located on the side of the lock box 43 close to the button 45. When the end of the trigger rod 42 away from the button 45 is rotated upward, the button 45 will be pushed toward the side of the first elastic member 44; the control rod 47 is connected to the end of the trigger rod away from the button 45, and the control rod 47 is tilted downward to extend the float 46 to the lower side of the water inlet 011, and the lower side surface of the float 46 is lower than the lower side surface of the water inlet 011 of the well body 01.

[0063] In the free state, the locking plate 41 is inserted into the locking groove 323 of the guide rod 32, and the shut-off valve 2 is in the closed state. When the water level in the well body 01 rises to the highest point, that is, when it is close to the water inlet 011, the water level drives the float 46 to float up, and the float 46 pushes the control rod 47 upward, so that the trigger rod 42 rotates to push the locking plate 41 so that the locking plate 41 is disengaged from the locking groove 323. At this time, the guide rod 32 moves upward under the buoyancy of the float 33, thereby opening the shut-off valve 2 and the system drains water outward. When the water level drops, the float 33 drives the guide rod 32 to move downward. When the guide rod 32 drops to the point where the locking plate 41 is flush with the locking groove 323, the locking plate 41 is inserted into the locking groove 323 under the action of the first elastic member 44, locking the guide rod 32.

[0064] A second elastic member 48 is sleeved on the guide rod 32, and the second elastic member 48 is a compression spring; a retaining ring 324 is fixed on the guide rod 32 below the locking groove 323, and the two ends of the second elastic member 48 are respectively abutted against the retaining ring 324 and the bottom of the lock box 43. When the locking plate 41 is out of the locking groove 323, the second elastic member 48 provides an upward thrust to the guide rod 32, so that the guide rod 32 quickly passes through the locking plate 41 to open the shut-off valve 2, which can improve the response rate of the system.

[0065] The implementation principle of Example 4 of the present application is: by setting a locking mechanism 4, the threshold for opening the shut-off valve 2 is increased through the locking mechanism 4. The shut-off valve 2 can only be opened when the water level in the well body 01 reaches the highest level. Similarly, the shut-off valve 2 will only be closed when the water level drops to a lower position. This can effectively reduce the number of times the shut-off valve 2 is opened and closed, and improve its overall service life.

[0066] Embodiment 5: The difference between Example 5 of the present application and Example 3 is that, referring to Fig.10 The driving end of the shut-off valve 2 is set as a handle 22 , and a toggle ring 325 is fixed at the upper end of the guide rod 32 . The toggle ring 325 is a metal ring, and the handle 22 of the shut-off valve 2 is inserted into the toggle ring 325 .

[0067] When the water level in the well body 01 rises, the float 33 gradually floats upward and abuts against the upper limit plate 321; as the water level further rises, the float 33 further floats upward under the action of buoyancy, and drives the guide rod 32 to move upward through the upper limit plate 321, and the toggle ring 325 pushes the handle 22 of the shut-off valve 2 to rotate, and the flow channel of the shut-off valve 2 gradually opens, and the system discharges the water in the well body 01. Moreover, the higher the water level in the well body 01, the greater the upward movement of the guide rod 32 and the toggle ring 325, and the greater the degree of opening of the flow channel of the shut-off valve 2, thereby achieving higher drainage efficiency at high water levels.

[0068] Reference Fig.11 The connection between the shutoff valve 2 and the guide rod 32 can also be set as follows: a slide groove 221 is provided through the handle 22, and the depth direction of the slide groove 221 is perpendicular to the length direction of the guide rod 32; a lever 326 is fixed on the guide rod 32, and the lever 326 is slidably inserted into the slide groove 221. When the guide rod 32 moves up and down with the rise and fall of the liquid level, the lever 326 will push the handle 22 to control the opening and closing of the shutoff valve 2.

[0069] Embodiment 6: The difference between Example 6 of the present application and Example 5 is that, referring to Fig.12A locking mechanism 4 is provided on the guide rod 32. In normal use, when the water level in the well body 01 rises to the float 46 that lifts the locking mechanism 4, the locking mechanism 4 will be unlocked, allowing the guide rod 32 to move up with the float 33 to open the shut-off valve 2, and the system will drain water to the outside.

[0070] Embodiment 7: The difference between Example 7 of the present application and Example 5 is that, referring to Fig.13 The water suction pipe 1 is provided with an air intake mechanism 5, which includes an air intake pipe 51, a throttle valve 52 and a control valve 53. The throttle valve 52 is installed in the control box 34; the control valve 53 is a floating ball valve, which is fixed on the water suction pipe 1 and communicated with the water suction pipe 1; the air intake pipe 51 is connected between the control valve 53 and the throttle valve 52, the throttle valve 52 is used to control the air intake rate of the air intake pipe 51, and the control valve 53 is used to control the on-off of the air intake pipe 51.

[0071] During use, as the water level in the well body 01 rises, the float 33 rises with the water level. When the float 33 rises to the upper limit plate 321 and drives the guide rod 32 to gradually open the shut-off valve 2, the system pumps water out through the suction pipe 1. At the same time, the water level in the well body 01 drives the float of the control valve 53 to float up and open the control valve 53. Air is constantly passed from the throttle valve 52 through the air intake pipe 51 into the suction pipe 1. The water in the suction pipe 1 is mixed with the air to form a water-gas mixture with a lower density, thereby increasing the head, reducing the selection of the system vacuum pump, and thus reducing the cost of using the system.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A silent self-priming device with stable performance, characterized by: It comprises a water suction pipe (1), a shut-off valve (2) installed on the water suction pipe (1), and a control mechanism (3) for controlling the opening and closing of the shut-off valve (2); the lower end of the water suction pipe (1) is inserted into a well body; the control mechanism (3) follows the rise and fall of the liquid level in the well body and is linked to the shut-off valve (2).

2. A silent self-priming device with stable performance according to claim 1, characterized in that: The control mechanism (3) comprises a guide component and a floating body (33) that follows the rise and fall of the water level. The guide component connects the floating body (33) and the shut-off valve (2) and guides the rising and falling movement of the floating body (33).

3. A silent self-priming device with stable performance according to claim 2, characterized in that: The guide assembly comprises a guide tube (31) and a guide rod (32) slidably inserted into the guide tube (31); the guide tube (31) is vertically fixed in the well body; the float (33) is connected to the guide rod (32); the guide rod (32) is connected to the shut-off valve (2); the float (33) drives the guide rod (32) to follow the rise and fall of the water level.

4. A silent self-priming device with stable performance according to claim 2, characterized in that: The guide assembly comprises a guide sleeve (37) and a guide rod (32), the float (33) is connected to the guide rod (32), the guide sleeve (37) is vertically fixed in the well body, and the float (33) slides in the guide sleeve (37); the guide rod (32) is connected to the shut-off valve (2), and the float (33) drives the guide rod (32) to follow the rise and fall of the water level.

5. A silent self-priming device with stable performance according to any one of claims 3 and 4, characterized in that: The control mechanism (3) further comprises a control box (34) arranged in the well body, the shut-off valve (2) is located in the control box (34), and the control end of the shut-off valve (2) is arranged as a driving gear (21); a driving rack (35) is fixed to the upper end of the guide rod (32) along the length direction, and the driving rack (35) is meshed with the driving gear (21).

6. A silent self-priming device with stable performance according to claim 5, characterized in that: A pulley (36) is installed in the control box (34) at a position corresponding to the driving rack (35), and the side wall of the driving rack (35) is in contact with the pulley (36).

7. A silent self-priming device with stable performance according to any one of claims 3 and 4, characterized in that: The floating body (33) is fixed on the guide rod (32).

8. A silent self-priming device with stable performance according to any one of claims 3 and 4, characterized in that: The floating body (33) is slidably arranged on the guide rod (32), an upper limit plate (321) and a lower limit plate (322) are fixed on the guide rod (32), and the floating body (33) slides between the upper limit plate (321) and the lower limit plate (322).

9. A silent self-priming device with stable performance according to claim 8, characterized in that: A counterweight block (331) is fixed on the floating body (33).

10. A silent self-priming device with stable performance according to any one of claims 3 and 4, characterized in that: The control box (34) is provided with a locking mechanism (4) for locking the guide rod (32), the locking mechanism (4) comprising a locking assembly and a trigger assembly; the locking assembly comprises a locking plate (41), a first elastic member (44) and a lock box (43) fixed in the control box (34), the guide rod (32) passes through the lock box (43) and slidably cooperates with the lock box (43); the locking plate (41) slides in the lock box (43) along a length direction perpendicular to the guide rod (32), a slot (411) is formed through the locking plate (41), the guide rod (32) is inserted into the slot (411), and the The outline size of the slot (411) is larger than the cross-sectional outline size of the guide rod (32); a locking slot (323) is provided on the side wall of the guide rod (32); the first elastic member (44) is located at one end of the locking plate (41); the first elastic member (44) pushes the locking plate (41) to be inserted into the locking slot (323); the trigger assembly comprises a floating ball (46); the floating ball (46) is located above the floating body (33); when the water level in the upper well body rises, the trigger assembly pushes the locking plate (41) toward one side of the first elastic member (44); when the water level drops, the first elastic member (44) pushes the locking plate (41) to return to its original position.

11. A silent self-priming device with stable performance according to claim 10, characterized in that: A button (45) for pushing the locking plate (41) to slide is slidably disposed on the locking box (43); the button (45) is located at an end of the locking plate (41) away from the first elastic member (44); and the button (45) is linked to the floating ball (46).

12. A silent self-priming device with stable performance according to claim 11, characterized in that: The trigger assembly further comprises a trigger rod (42) and a control rod (47); the trigger rod (42) is rotatably fixed in the control box (34) and is located on a side of the lock box (43) close to the button (45); the control rod (47) is connected to an end of the trigger rod (42) away from the button (45), and the float (46) is connected to an end of the control rod (47) away from the trigger rod (42), and the control rod (47) extends the float (46) to below the water inlet of the well body; when the water level in the well body rises to lift the float (46), the trigger rod (42) rotates and pushes the button (45).

13. A silent self-priming device with stable performance according to claim 10, characterized in that: A second elastic member (48) is also provided in the lock box (43). The second elastic member (48) is sleeved on the guide rod (32). A snap ring (324) is fixed on the guide rod (32) below the lock groove (323). Two ends of the second elastic member (48) respectively abut against the snap ring (324) and the bottom of the lock box (43).

14. A silent self-priming device with stable performance according to any one of claims 3 and 4, characterized in that: The driving end of the shut-off valve (2) is arranged as a handle (22), and the guide rod (32) is slidably connected to the handle (22).

15. A silent self-priming device with stable performance according to claim 14, characterized in that: A toggle ring (325) is arranged in the control box (34); the toggle ring (325) is fixed on the guide rod (32) and sleeved on the handle (22).

16. A silent self-priming device with stable performance according to claim 14, characterized in that: A sliding groove (221) is provided on the handle (22) along the length direction, and a shifting rod (326) is fixed to the guide rod (32), and the shifting rod (326) is slidably connected in the sliding groove (221).

17. A silent self-priming device with stable performance according to claim 1, characterized in that: The invention also comprises an air intake mechanism (5), the air intake mechanism (5) comprising an air intake pipe (51) connected to the water suction pipe (1), and a throttle valve (52) for controlling the air intake amount of the air intake pipe (51), the air intake pipe (51) being in communication with the water suction pipe (1); when the water suction pipe (1) pumps water outward, the air intake pipe (51) introduces a constant amount of air into the water suction pipe (1).

18. A silent self-priming device with stable performance according to claim 17, characterized in that: The air intake mechanism (5) further comprises a control valve (53) connected to the air intake pipe (51), wherein the control valve (53) controls the on-off of the air intake pipe (51); when the water suction pipe (1) pumps water outward, the control valve (53) opens, and when the water suction pipe (1) stops pumping water, the control valve (53) closes.

19. A silent self-priming device with stable performance according to claim 18, characterized in that: The control valve (53) is configured as a float valve and is fixed on the water suction pipe (1); when the water level in the well body rises and submerges the control valve (53), the control valve (53) opens and the air intake pipe (51) intakes air into the water suction pipe (1); when the water level drops below the control valve (53), the control valve (53) closes.

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