Fluid machine inlet device with self-cleaning function

Abstract

This invention discloses a self-cleaning fluid machinery inlet device, belonging to the field of fluid pump technology. The self-cleaning fluid machinery inlet device includes an inlet pipe installed at the inlet end of a mortar pump. A filter frame extending obliquely towards the water inlet is located in the middle of the inlet pipe. A through-hole is opened at the top of the inlet pipe directly above the filter frame. An upward-extending top shell is located at the through-hole, and a main one-way valve with bottom-to-top conduction is located on the top of the top shell. A blocking plate is installed at the bottom of the inlet pipe directly below the filter frame. This invention, through its overall structural design, utilizes the real-time precipitation and extraction of air bubbles in the mortar to prevent cavitation. Simultaneously, it leverages the reciprocating characteristics of a diaphragm pump to generate a high-frequency pulsed water flow. Combined with the bottom-openable blocking plate, it efficiently peels off and removes stubborn impurities. This design eliminates the need for an additional independent backwashing component, significantly reducing equipment costs and maintenance difficulty.

Description

Technical Field

[0001] This invention belongs to the field of fluid pump technology, specifically relating to a fluid machinery inlet device with self-cleaning function. Background Technology

[0002] Mortar pumps, as an important type of fluid transport machinery, are widely used in construction, mining, and water conservancy projects. They are used to transport high-concentration mortar containing solid particles. During the mining process, a large amount of slurry containing solid particles is generated. This slurry is not only highly concentrated, but also contains particles of varying sizes and with high hardness. Mortar pumps can quickly and efficiently transport the slurry from the mining site to subsequent processing stages, providing a strong guarantee for the normal production of mines and the efficient utilization of resources.

[0003] A Chinese utility model patent with publication number CN219605680U discloses a vertical mortar pump for preventing clogging. The pump uses a drive shaft to rotate a horizontal plate and scraper, which removes mortar adhering to the filter screen, preventing clogging. However, in actual use, while this scraping can remove the adhering material from the filter screen surface, it also causes significant wear on the screen. Furthermore, the continuous water flow disturbance on the water-facing side of the filter screen generates numerous air bubbles. These bubbles enter the high-speed rotating mortar pump, causing cavitation on the pump blade edges and affecting the service life of both the pump and the filter screen. Therefore, this invention provides a fluid machinery inlet device with a self-cleaning function. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a fluid machinery inlet device with self-cleaning function.

[0005] The technical solution adopted to solve the above technical problems is: A fluid machinery inlet device with self-cleaning function, comprising: An inlet pipe is installed at the inlet end of the mortar pump. A filter frame with its top extending at an angle towards the water inlet is provided in the middle of the inlet pipe. A through-hole is provided at the top of the inlet pipe directly above the filter frame. A top shell extending upwards is provided at the through-hole of the inlet pipe. A main one-way valve that flows from bottom to top is provided at the top of the top shell. A blocking plate is installed at the bottom of the inlet pipe directly below the filter frame. A diaphragm pump has a first pipe assembly and a second pipe assembly installed at its two ports. The first pipe assembly includes a first reversing valve connected to the diaphragm pump. The first reversing valve is connected in parallel to a first outlet pipe and a first inlet pipe. Both the first outlet pipe and the first inlet pipe are unidirectionally connected from bottom to top. The second pipe assembly includes a second reversing valve connected to the diaphragm pump. The second reversing valve is connected in parallel to a second inlet pipe and a second outlet pipe. The second inlet pipe is connected to the top of a main check valve. An independent check valve is connected in series in the middle section of the second outlet pipe.

[0006] During operation, with the mortar pump closed, the plug plate forms a complete inlet pipe. The first and second directional valves connect the first outlet pipe and the second inlet pipe to the diaphragm pump, respectively. Because the first outlet pipe flows unidirectionally from bottom to top, and the second inlet pipe is connected to the main check valve (also flowing from bottom to top), due to Bernoulli's principle (where the flow velocity is higher, the pressure is lower), the local water pressure drops sharply at the filter frame holes or just as the mortar passes through them. This causes the dissolved gases in the mortar to saturate and precipitate, forming fine air bubbles. These bubbles rise with the mortar flow. When the diaphragm pump is operating, the unidirectional water flow from the second inlet pipe to the first outlet pipe allows the fine air bubbles and some mortar generated downstream of the filter frame to be drawn out of the inlet pipe through the through-hole after the mortar passes through the filter frame. Furthermore, the mortar pump has low requirements for the medium and is not easily damaged even after prolonged use. When the filter frame becomes clogged, causing significant head loss... When the pump is activated, the mortar pump stops, the plug plate opens, and the bottom opening of the inlet pipe is opened. The first and second reversing valves connect the first inlet pipe and the second outlet pipe to the diaphragm pump respectively. Because the first inlet pipe is unidirectionally oriented from bottom to top, and the second outlet pipe is equipped with an independent check valve, the water flow in the second outlet pipe can only flow directionally from the second reversing valve to the top shell. When the diaphragm pump is working, it uses the unidirectional water flow from the first inlet pipe to the second outlet pipe to flush the backwash water downward through the through-hole to the filter frame. Due to the special pumping method of the diaphragm pump, the backwash water intermittently flushes the filter frame in a pulse manner, which can quickly flush the debris on the water-facing side of the filter frame downward and quickly discharge it from the inlet pipe through the opened plug plate. Compared with the continuous water flow backwashing method, the backwashing effect is better, and it directly uses the existing diaphragm pump and pipe assembly without adding a separate backwashing component. The structure is compact, the equipment manufacturing cost is low, and the maintenance is convenient.

[0007] Furthermore, it also includes a drive assembly, which is equipped with a linkage and a clutch, and a synchronization chain is provided between the linkage and the clutch. The linkage has a horizontally arranged camshaft built in it, which provides driving force for the diaphragm pump. The clutch has a horizontally arranged drive shaft built in it, which provides driving force for the mortar pump.

[0008] With the above technical solution, the drive component serves as the power source, and the clutch is connected to an external motor. By installing a drive shaft at the output end, the drive force is provided to the mortar pump. At the same time, at the input end of the clutch, the synchronous chain group provides power to the camshaft of the linkage, which can drive the diaphragm pump to work. There is no need to install a new motor separately. The structure is compact, the power source is few, and maintenance is convenient.

[0009] Furthermore, a vertically arranged slide rod is fixedly installed in the middle of the diaphragm of the diaphragm pump. The slide rod is located directly above the camshaft, and the bottom end of the slide rod slides in contact with the circumferential sidewall of the eccentric section of the camshaft.

[0010] The above technical solution discloses a specific driving method. The slide rod in the middle of the diaphragm slides vertically under the guidance of its own shell. When the bottom end of the slide rod is aligned with the eccentric section of the camshaft, the slide rod can be driven to slide up and down by the rotation of the camshaft, thereby causing the diaphragm to move up and down to change the volume below. Since both ports of the diaphragm pump are designed on the same side of the diaphragm, it can be used with the first and second pipe groups for directional flow to perform controllable pumping.

[0011] Furthermore, it also includes a cooling component, which includes a heat dissipation bearing housing. The heat dissipation bearing housing is sleeved at the connection between the drive shaft and the power shaft of the mortar pump. The end of the built-in flow channel of the heat dissipation bearing housing is connected to a circulation pipe assembly. The end of the circulation pipe assembly away from the heat dissipation bearing housing is connected to an oil supply tank, which contains heat transfer oil.

[0012] With the above technical solution, when using a dry friction plate clutch for power transmission and isolation, continuous heat will be generated. In order to avoid the heat of the clutch interfering with the thermal stability of the seal ring of the mortar pump, a heat dissipation bearing housing is designed between the clutch and the mortar pump for heat isolation. The heat of the clutch will be directly absorbed by the heat-conducting oil inside the heat dissipation bearing housing and transferred to the oil supply tank to contact the outside for heat dissipation.

[0013] Furthermore, the oil supply tank contains an impeller, the camshaft is coaxially and fixedly connected to the impeller, and an annular guide shroud is fitted on the outer edge of the impeller. The circulation pipe assembly includes an oil outlet pipe and an oil return pipe. The oil outlet pipe is installed through the bottom side wall of the guide shroud along the tangent direction, and the end of the oil return pipe away from the heat dissipation bearing seat is installed through the upper side wall of the oil supply tank.

[0014] Through the above technical solution, to achieve more efficient cooling, an impeller is built into the oil supply tank, and the rotation of the camshaft that powers the diaphragm pump provides rotational driving force. The compact drive structure allows the heat transfer oil to be propelled by the centrifugal force of the impeller and guided by the guide shroud along the oil outlet pipe into the built-in flow channel of the heat dissipation bearing housing for heat absorption. Driven by the continuous inflow of heat transfer oil, it returns to the oil supply tank from the return oil pipe for circulating contact cooling. At the same time, due to the semi-enclosed structure of the guide shroud, not all the heat transfer oil propelled by the impeller will enter the oil outlet pipe. The remaining heat transfer oil will flush the inner wall of the oil supply tank. The oil supply tank is designed with a high thermal conductivity material, which can utilize the external atmosphere or other objects in contact with the oil supply tank to transfer heat from the heat transfer oil, ensuring that the heat transfer oil can still play a cooling role during long-term operation.

[0015] Furthermore, the main check valve has a partition ball in the middle, the connection between the second inlet pipe and the main check valve is located above the partition ball, and the connection between the second outlet pipe and the main check valve is located below the partition ball.

[0016] With the above technical solution, in order to ensure that the air bubbles are successfully extracted, when the second inlet pipe is pumping water, the air bubbles will be carried to the top of the partition ball. When the water flow is still during the interval between the operation of the diaphragm pump, the air bubbles will also be blocked by the partition ball and cannot be sucked back into the inlet pipe. In order to ensure that the backwash water can smoothly enter the through-hole, the connection point is designed below the partition ball when arranging the second outlet pipe. In this way, the backwash water does not need to flow through the partition ball. At the same time, because the second inlet pipe is blocked by the second reversing valve, the backwash water will not push the partition ball upward and will spray directly downward from the through-hole.

[0017] Furthermore, the blocking plate includes a plate body, with a hinge seat one and a hinge seat two installed at both ends of the plate body. A telescopic rod one is hinged to the side wall of the hinge seat two. The end of the telescopic rod one away from the plate body is rotatably connected to the inlet pipe. The hinge seat one is hinged to the inlet pipe.

[0018] The above technical solution discloses a specific configuration of a blocking plate. The curvature of the plate body is consistent with that of the inlet pipe, ensuring that when it is embedded in the opening at the bottom of the inlet pipe, the bottom surface of the inlet pipe is smooth and without protrusions, allowing the mortar to pass through smoothly and avoiding abnormal wear on the top surface of the blocking plate. At the same time, by using the installation method of hinged at one end and swinging at the other end, the opening and closing can be quickly driven by the extension and retraction of the telescopic rod, making operation convenient.

[0019] Furthermore, a support lug is rotatably mounted on one side wall of the hinge seat, and the end of the support lug away from the plate is fixedly connected to the inlet pipe.

[0020] The above technical solution provides a specific hinge method. To ensure that the hinge seat is firmly installed with the inlet pipe, the lower side wall of the inlet pipe is reinforced and a support ear is extended. The arc-shaped side wall of the inlet pipe is leveled and thickened to facilitate the installation of the hinge seat and the corresponding bearing. Furthermore, it can avoid stress cracking caused by insufficient side wall thickness at the connection position of the inlet pipe.

[0021] Furthermore, a swing arm is rotatably mounted on one side wall of the hinge seat, and a telescopic rod II is rotatably mounted in the middle of the swing arm. The ends of the swing arm and the telescopic rod II away from the plate are respectively rotatably connected to the inlet pipe.

[0022] Through the above technical solution, in order to adapt to the requirements of high internal pressure mortar environment, when the internal pressure of mortar connected to the inlet pipe is large, only the bearing at the rotating connection position is used for limiting and supporting, and leakage is likely to occur at the hinge seat one position. At this time, a swing arm is set between the hinge seat one and the inlet pipe, and the swing arm is pulled by the telescopic rod two to achieve upward pressure on the hinge seat one. A pre-tightening force can be provided at the hinge seat one end of the plate to ensure the sealing effect. In addition, when the plate is opened, the swing arm swings downward so that the plate can be completely separated from the inlet pipe, the opening angle is larger and it is more convenient for the internal mortar and backwash water to flow out, ensuring the efficiency of backwash water flow.

[0023] Furthermore, it also includes a water tank, which is located outside the first pipe assembly, and the first outlet pipe and the first inlet pipe are fixed to the side wall of the water tank by clamps.

[0024] The above technical solution collects the filtered water drawn out during the exhaust stage and reuses it during backwashing. A water tank is designed to enclose the first pipe assembly. During normal operation, the filtered water drawn out during exhaust is stored in the water tank, avoiding waste caused by direct discharge. During backwashing, the collected filtered water is used for backwashing, avoiding contamination of the back surface of the filter frame. Furthermore, it reduces the amount of backwash water introduced from the outside or uses only the collected filtered water, thus reducing the cost of pipe laying and making full use of the filtered water.

[0025] The beneficial effects of this invention are as follows: (1) The present invention uses the design of the overall structure to prevent cavitation by real-time precipitation and extraction of air bubbles in the mortar. At the same time, it reuses the reciprocating characteristics of the diaphragm pump to generate high-frequency pulse water flow. Combined with the bottom openable plug plate, it can efficiently peel off and discharge stubborn impurities. This design does not require additional independent backwashing components, which significantly reduces equipment cost and maintenance difficulty. (2) This invention adopts a single power source integrated drive and active heat dissipation system, and distributes the power of a single motor to the mortar pump and the diaphragm pump through the linkage, clutch and synchronous chain group. The structure is compact. In view of the high heat problem of the clutch, a heat dissipation bearing seat with built-in flow channel is designed for thermal isolation. The camshaft coaxially drives the impeller to achieve forced circulation cooling of heat transfer oil without additional power, effectively protecting the sealing components and ensuring the long-term reliable operation of the system. (3) The present invention adopts a hinged structure with a pre-tightened swing arm through the plug plate, which takes into account both the sealing performance under high internal pressure and the convenience of sewage discharge with a large opening angle. In addition, the added water tank not only realizes the recycling of filtered water to save resources, but also serves as a fixed base to effectively suppress pipeline vibration and further extend the service life of the equipment. Attached Figure Description

[0026] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a second-view structural diagram of the present invention; Figure 3 This is a schematic diagram showing the location of the internal structure of the present invention; Figure 4 This is a schematic diagram of the structure between the inlet pipe and the plug plate of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the structure between the inlet pipe and the plug plate of the present invention. Figure 2 ; Figure 6 This is a schematic diagram showing the positions of the camshaft, drive shaft, diaphragm pump, and cooling assembly of the present invention. Figure 7 This is a schematic diagram showing the positions of the camshaft, diaphragm pump, and cooling assembly of the present invention. Figure 8 This is a schematic diagram of the structure between the diaphragm pump, the first tubing assembly, and the second tubing assembly of the present invention. Figure 9 This is a schematic diagram of the structure of the first pipe assembly of the present invention.

[0027] Attached reference numerals: 1. Mortar pump; 11. Outlet pipe; 2. Inlet pipe; 21. Blocking plate; 211. Telescopic rod one; 212. Telescopic rod two; 213. Swing arm; 214. Hinge seat one; 215. Hinge seat two; 216. Plate; 217. Support lug; 22. Top shell; 23. Main check valve; 231. Isolation ball; 24. Filter frame; 25. Through port; 3. Diaphragm pump; 31. First pipe assembly; 311. First reversing valve; 312. First outlet pipe; 313. First inlet... 32. Water pipe; 321. Second pipe assembly; 322. Second reversing valve; 323. Second water inlet pipe; 324. Second water outlet pipe; 325. Independent check valve; 4. Cooling assembly; 41. Oil supply tank; 411. Impeller; 412. Flow guide; 42. Circulation pipe assembly; 421. Oil outlet pipe; 422. Oil return pipe; 43. Heat dissipation bearing seat; 5. Drive assembly; 51. Synchronous chain assembly; 52. Linkage device; 521. Camshaft; 53. Clutch; 531. Drive shaft; 6. Water tank. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] like Figure 1 - Figure 9 As shown, this embodiment provides a self-cleaning fluid machinery inlet device mainly used in mortar pump 1 and other easily clogged media conveying systems. The device consists of an inlet assembly and a self-cleaning pumping assembly. The inlet assembly includes an inlet pipe 2 installed at the inlet end of the mortar pump 1. The middle of the inlet pipe 2 is provided with a filter frame 24 that extends at an angle towards the water inlet to intercept large particles of impurities. A through-hole 25 is opened at the top of the inlet pipe 2 directly above the filter frame 24 and extends upward to form a top shell 22. The top of the top shell 22 is equipped with a main one-way valve 23 that allows unidirectional flow from bottom to top. The bottom of the inlet pipe 2, located directly below the filter frame 24, is equipped with a plug plate 21 for closing or opening the drain outlet. The self-cleaning pumping assembly uses a diaphragm pump 3 as its power source. Its two ports are connected to a first pipe group 31 and a second pipe group 32, respectively. The first pipe group 31 includes a first reversing valve 311 connected to the diaphragm pump 3. This valve is connected in parallel with a first outlet pipe 312 and a first inlet pipe 313, both configured to unidirectionally flow from bottom to top. The second pipe group 32 includes a second reversing valve 321 connected to the diaphragm pump 3. This valve is connected in parallel with a second inlet pipe 322 and a second outlet pipe 323. The top end of the second inlet pipe 322 is connected to a main check valve 23, and the middle section of the second outlet pipe 323 is connected in series with an independent check valve 324 to ensure a single flow direction.

[0030] The working principle of this embodiment is as follows: The device switches between two modes—"online exhaust and degassing" and "shutdown pulse backwashing"—by controlling the reversing valve. In normal operation and online venting mode, mortar pump 1 operates and blockage plate 21 is closed to form a complete flow channel. The reversing valve connects the first outlet pipe 312 and the second inlet pipe 322. At this time, the mortar flows through the filter frame 24. Due to the throttling effect, the local flow velocity increases and the pressure drops instantaneously, causing the dissolved gas to become supersaturated and precipitate, forming fine bubbles that carry light impurities to float to the top shell 22 area. Subsequently, diaphragm pump 3 starts to establish a suction flow path from the second inlet pipe 322 through the main check valve 23 to the first outlet pipe 312. The negative pressure is used to extract the bubbles and suspended impurities through the through-port 25 to the inlet pipe 2. In order to maximize the collection efficiency of bubbles in the flowing mortar, multiple through-ports 25 are designed along the mortar flow direction to continuously collect bubbles in a relatively long area, increase the collection capacity along the line, and discharge bubbles as much as possible, effectively preventing air resistance and blade cavitation of mortar pump 1. When the filter frame 24 is found to be blocked, causing a significant increase in the system head loss (which can be detected by...). A liquid flow rate sensor is installed at the outlet pipe 11. The device enters the shutdown pulse backwash mode: the mortar pump 1 stops, the blockage plate 21 opens to open the bottom drain port of the inlet pipe 2, and the reversing valve switches the connection between the first inlet pipe 313 and the second outlet pipe 323. Utilizing the unidirectional conduction characteristic of the pipeline, the diaphragm pump 3 establishes a reverse flow path that draws water from the first inlet pipe 313 and injects water into the top shell 22 through the second outlet pipe 323. The high-frequency pulse water flow generated by the reciprocating motion of the diaphragm pump 3 is powerfully flushed downward through the through port 25 to the filter frame 24. Compared with continuous water flow, this pulse method has a stronger instantaneous impact force and shear force, which can effectively remove stubborn debris from the water-facing surface of the filter frame 24. The detached debris is quickly discharged directly through the bottom opening of the inlet pipe 2 under the action of gravity and water flow. This design directly reuses the existing diaphragm pump 3 and pipeline system without the need for additional backwash components. It is not only compact and low in manufacturing cost, but also significantly improves cleaning efficiency and maintenance convenience.

[0031] In a further embodiment, refer to Figure 3 It also includes a drive assembly 5, which has a linkage 52 and a clutch 53. The drive assembly 5 serves as a power source. The clutch 53 is externally connected to a motor. The drive force for the mortar pump 1 is provided by a drive shaft 531 installed at the output end. A synchronous chain 51 is provided between the linkage 52 and the clutch 53. At the input end of the clutch 53, the synchronous chain 51 provides power to the linkage 52. The linkage 52 has a horizontally arranged camshaft 521 built in it, which can drive the diaphragm pump 3 to work. In addition, the clutch 53 has a horizontally arranged drive shaft 531 built in it, which provides driving force for the mortar pump 1. Only one motor is needed as a power source. The power source is small and the maintenance is convenient. The mortar pump 1 can also be stopped separately during backflushing. The structure is compact.

[0032] In a further embodiment, a specific driving method is disclosed, referring to... Figure 6 and Figure 7 A vertically arranged slide rod is fixedly installed in the middle of the diaphragm of the diaphragm pump 3. The slide rod is located directly above the camshaft 521. The bottom end of the slide rod slides in contact with the circumferential side wall of the eccentric section of the camshaft 521. The slide rod in the middle of the diaphragm will slide vertically under the guidance of its own outer shell. When the bottom end of the slide rod is aligned with the eccentric section of the camshaft 521, the slide rod can be driven to slide up and down by the rotation of the camshaft 521, thereby causing the diaphragm to move up and down to change the volume below. Since the two ports of the diaphragm pump 3 are designed on the same side of the diaphragm, it can be used with the first pipe group 31 and the second pipe group 32 for directional conduction to perform controllable pumping.

[0033] In a further embodiment, when a dry friction plate clutch 53 is used for power transmission and disconnection, continuous heat is generated. Therefore, the device also includes a cooling component 4, as shown in the reference. Figure 3 The cooling component 4 includes a heat dissipation bearing seat 43, which is sleeved at the connection between the drive shaft 531 and the power shaft of the mortar pump 1. The end of the internal flow channel of the heat dissipation bearing seat 43 is connected to a circulation pipe assembly 42. The end of the circulation pipe assembly 42 away from the heat dissipation bearing seat 43 is connected to an oil supply tank 41, which contains heat transfer oil. In order to avoid the heat of the clutch 53 from interfering with the thermal stability of the sealing ring of the mortar pump 1, a heat dissipation bearing seat 43 is designed between the clutch 53 and the mortar pump 1 for heat isolation. The heat of the clutch 53 will be directly absorbed by the heat transfer oil inside the heat dissipation bearing seat 43 and transferred to the oil supply tank 41 to contact the outside for heat dissipation.

[0034] In a further embodiment, to achieve more efficient cooling, refer to Figure 6 and Figure 7An impeller 411 is built into the oil supply tank 41. A camshaft 521 is coaxially and fixedly connected to the impeller 411. The rotation of the camshaft 521, which powers the diaphragm pump 3, provides rotational driving force. The drive structure is compact, allowing the heat transfer oil to be propelled by the centrifugal force of the impeller 411. An annular guide shroud 412 is fitted around the outer edge of the impeller 411. The circulation pipe assembly 42 includes an oil outlet pipe 421 and an oil return pipe 422. The oil outlet pipe 421 is installed along the tangential direction of the guide shroud 412 at the bottom side wall of the guide shroud 412. The heat transfer oil is guided by the guide shroud 412 and enters the built-in flow channel of the heat dissipation bearing seat 43 along the oil outlet pipe 421 for heat absorption. The oil return pipe 422 is away from the heat dissipation bearing seat 43. One end of the bearing housing 43 is installed through the upper side wall of the oil supply tank 41. Driven by the continuously entering heat transfer oil, it returns to the oil supply tank 41 from the return oil pipe 422 for circulating contact cooling. At the same time, due to the semi-enclosed structure of the guide shroud 412, not all the heat transfer oil pushed by the impeller 411 will enter the oil outlet pipe 421. The remaining heat transfer oil will be disturbed and mixed with other heat transfer oil in the oil supply tank 41 and flush the inner wall of the oil supply tank 41. The oil supply tank 41 is designed with a high thermal conductivity material, which can use the outside atmosphere or other objects in contact with the oil supply tank 41 to transfer heat from the heat transfer oil, ensuring that the heat transfer oil can still play a cooling role during long-term operation.

[0035] In a further embodiment, to ensure that the air bubble is successfully extracted, refer to Figure 3 The main check valve 23 has a partition ball 231 in the middle. The connection between the second inlet pipe 322 and the main check valve 23 is located above the partition ball 231, and the connection between the second outlet pipe 323 and the main check valve 23 is located below the partition ball 231. When the second inlet pipe 322 pumps water, air bubbles will be carried to the top of the partition ball 231. When the water flow is still during the interval between the operation of the diaphragm pump 3, the air bubbles will also be blocked by the partition ball 231 and cannot be sucked back to the inlet pipe 2. In order to ensure that the backwash water can smoothly enter the through port 25, the connection of the second outlet pipe 323 is designed to be below the partition ball 231. In this way, the backwash water does not need to flow through the partition ball 231. At the same time, because the second inlet pipe 322 is blocked by the second reversing valve 321, the backwash water will not push the partition ball 231 upward and will spray directly downward from the through port 25.

[0036] In a further embodiment, a specific configuration of the blocking plate 21 is disclosed, referring to... Figure 3The blocking plate 21 includes a plate body 216. A hinge seat 1 214 and a hinge seat 215 are installed at both ends of the plate body 216. A telescopic rod 1 211 is hinged to the side wall of the hinge seat 215. The end of the telescopic rod 1 211 away from the plate body 216 is rotatably connected to the inlet pipe 2. The hinge seat 1 214 is hinged to the inlet pipe 2. The curvature of the plate body 216 is consistent with that of the inlet pipe 2, ensuring that when embedded in the opening at the bottom of the inlet pipe 2, the bottom surface of the inlet pipe 2 is smooth and without protrusions, allowing mortar to pass smoothly and avoiding abnormal wear on the top surface of the blocking plate 21. Simultaneously, the installation method of hinged at one end and swinging at the other allows for quick opening and closing via the extension and retraction of the telescopic rod 1 211, making operation convenient.

[0037] In a further embodiment, a specific hinge method is provided, referring to... Figure 4 The hinge seat 214 has a rotatable lug 217 mounted on its side wall. The end of the lug 217 away from the plate 216 is fixedly connected to the inlet pipe 2. To ensure that the hinge seat 214 and the inlet pipe 2 are firmly installed, the lower side wall of the inlet pipe 2 is reinforced and a lug 217 is extended out. The arc-shaped side wall of the inlet pipe 2 is leveled and thickened to facilitate the installation of the hinge seat 214 and the corresponding bearing. In addition, it can avoid stress cracking caused by insufficient side wall thickness at the connection position of the inlet pipe 2.

[0038] In a further embodiment, to adapt to the requirements of high internal pressure mortar environment, refer to Figure 5 A swing arm 213 is rotatably mounted on the side wall of the hinge seat 214. A telescopic rod 212 is rotatably mounted in the middle of the swing arm 213. The ends of the swing arm 213 and the telescopic rod 212 away from the plate 216 are respectively rotatably connected to the inlet pipe 2. When the internal pressure of the mortar connected to the inlet pipe 2 is large, the bearing at the rotatable connection position is only used for limiting and supporting, and leakage is likely to occur at the hinge seat 214 position. At this time, a swing arm 213 is set between the hinge seat 214 and the inlet pipe 2. The telescopic rod 212 pulls the swing arm 213 to achieve upward pressure on the hinge seat 214. A pre-tightening force can be provided at the hinge seat 214 end of the plate 216 to ensure the sealing effect. In addition, when the plate 216 is opened, the swing arm 213 swings downward so that the plate 216 can be completely separated from the inlet pipe 2. The opening angle is larger and it is more convenient for the internal mortar and backwash water to flow out, ensuring the efficiency of backwash water flow.

[0039] In a further embodiment, the filtered water drawn out during the exhaust stage is collected and reused during backwashing, as described above. Figure 2It also includes a water tank 6, which is located outside the first pipe assembly 31. The water tank 6 is designed to enclose the first pipe assembly 31. During normal operation, the filtered water drawn out by the exhaust is stored in the water tank 6 to avoid waste caused by direct discharge. During backwashing, the collected filtered water is used for backwashing to avoid contaminating the back water surface of the filter frame 24. Furthermore, it reduces the amount of backwash water introduced from the outside or uses all the collected filtered water instead of the backwash water introduced from the outside, which can reduce the cost of pipe laying and make full use of the filtered water. The first outlet pipe 312 and the first inlet pipe 313 are fixed to the side wall of the water tank 6 by clamps. Because of the intermittent pumping characteristics of the diaphragm pump 3, if the first pipe assembly 31 is directly suspended, the interface is prone to loosening due to vibration. Therefore, fixing the first pipe assembly 31 to the water tank 6 and then fixing the water tank 6 to the ground can effectively suppress the vibration of the first pipe assembly 31 during operation.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A fluid machinery inlet device with self-cleaning function, characterized in that, include: An inlet pipe (2) is installed at the inlet end of the mortar pump (1). The middle part of the inlet pipe (2) is provided with a filter frame (24) that extends at an inclination towards the water inlet direction. The top of the inlet pipe (2) is provided with a through port (25) directly above the filter frame (24). The inlet pipe (2) is provided with an upward-extending top shell (22) at the through port (25). The top of the top shell (22) is provided with a main one-way valve (23) that flows from bottom to top. The bottom of the inlet pipe (2) is provided with a blockage plate (21) directly below the filter frame (24). A diaphragm pump (3) has a first pipe assembly (31) and a second pipe assembly (32) installed at its two ports respectively. The first pipe assembly (31) includes a first reversing valve (311) connected to the diaphragm pump (3). The first reversing valve (311) is connected in parallel with a first outlet pipe (312) and a first inlet pipe (313). The first outlet pipe (312) and the first inlet pipe (313) are both unidirectionally connected from bottom to top. The second pipe assembly (32) includes a second reversing valve (321) connected to the diaphragm pump (3). The second reversing valve (321) is connected in parallel with a second inlet pipe (322) and a second outlet pipe (323). The second inlet pipe (322) is connected to the top of the main check valve (23). An independent check valve (324) is connected in series in the middle section of the second outlet pipe (323). When the mortar pump (1) is in operation, the blockage plate (21) is closed, and the first reversing valve (311) and the second reversing valve (321) connect the first outlet pipe (312) and the second inlet pipe (322) to the diaphragm pump (3) respectively. When the diaphragm pump (3) is in operation, the air bubbles generated downstream of the filter frame (24) are drawn out of the inlet pipe (2) through the through port (25). When the mortar pump (1) is stopped, the blockage plate (21) is opened, and the first reversing valve (311) and the second reversing valve (321) connect the first inlet pipe (313) and the second outlet pipe (323) to the diaphragm pump (3) respectively. When the diaphragm pump (3) is in operation, the backwash water is flushed down the filter frame (24) through the through port (25).

2. The fluid machinery inlet device with self-cleaning function according to claim 1, characterized in that, It also includes a drive assembly (5), which is provided with a linkage (52) and a clutch (53). A synchronization chain (51) is provided between the linkage (52) and the clutch (53). The linkage (52) has a horizontally arranged camshaft (521) built in it, which provides driving force for the diaphragm pump (3). The clutch (53) has a horizontally arranged drive shaft (531) built in it, which provides driving force for the mortar pump (1).

3. The fluid machinery inlet device with self-cleaning function according to claim 2, characterized in that, The diaphragm pump (3) has a vertically arranged slide rod fixedly installed in the middle of the diaphragm. The slide rod is located directly above the camshaft (521), and the bottom end of the slide rod slides in contact with the circumferential side wall of the eccentric section of the camshaft (521).

4. The fluid machinery inlet device with self-cleaning function according to claim 3, characterized in that, It also includes a cooling component (4), which includes a heat dissipation bearing housing (43). The heat dissipation bearing housing (43) is sleeved at the connection between the drive shaft (531) and the power shaft of the mortar pump (1). The end of the built-in flow channel of the heat dissipation bearing housing (43) is connected to a circulation pipe assembly (42). The end of the circulation pipe assembly (42) away from the heat dissipation bearing housing (43) is connected to an oil supply tank (41). The oil supply tank (41) contains heat transfer oil.

5. The fluid machinery inlet device with self-cleaning function according to claim 4, characterized in that, The oil supply tank (41) contains an impeller (411), and the camshaft (521) is coaxially and fixedly connected to the impeller (411). An annular guide shroud (412) is fitted on the outer edge of the impeller (411). The circulation pipe assembly (42) includes an oil outlet pipe (421) and an oil return pipe (422). The oil outlet pipe (421) is installed through the bottom side wall of the guide shroud (412) along the tangent direction of the guide shroud (412). The end of the oil return pipe (422) away from the heat dissipation bearing seat (43) is installed through the upper side wall of the oil supply tank (41).

6. The fluid machinery inlet device with self-cleaning function according to claim 1, characterized in that, The main check valve (23) has a partition ball (231) in the middle. The connection between the second inlet pipe (322) and the main check valve (23) is located above the partition ball (231), and the connection between the second outlet pipe (323) and the main check valve (23) is located below the partition ball (231).

7. The fluid machinery inlet device with self-cleaning function according to claim 1, characterized in that, The blocking plate (21) includes a plate body (216), and two hinge seats (214 and 215) are installed at both ends of the plate body (216). A telescopic rod (211) is hinged to the side wall of the second hinge seat (215). The end of the telescopic rod (211) away from the plate body (216) is rotatably connected to the inlet pipe (2). The first hinge seat (214) is hinged to the inlet pipe (2).

8. The fluid machinery inlet device with self-cleaning function according to claim 7, characterized in that, The hinge seat (214) has a support lug (217) rotatably mounted on its side wall. The end of the support lug (217) away from the plate (216) is fixedly connected to the inlet pipe (2).

9. The fluid machinery inlet device with self-cleaning function according to claim 7, characterized in that, A swing arm (213) is rotatably mounted on the side wall of the hinge seat (214), and a telescopic rod (212) is rotatably mounted in the middle of the swing arm (213). The ends of the swing arm (213) and the telescopic rod (212) away from the plate (216) are respectively rotatably connected to the inlet pipe (2).

10. The fluid machinery inlet device with self-cleaning function according to claim 1, characterized in that, It also includes a water tank (6), which is located outside the first pipe group (31), and the first outlet pipe (312) and the first inlet pipe (313) are fixed to the side wall of the water tank (6) by a clamp.

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