PPRY type pre-filter

Abstract

The invention belongs to the technical field of filters, and particularly discloses a PPRY type pre-filter which comprises a connecting pipe and a flow dividing pipe, the flow dividing pipe is communicated with the surface of the connecting pipe and is obliquely arranged, a liquid discharging pipe is arranged at the other end of the flow dividing pipe, a controller is arranged on the surface of the flow dividing pipe, a filtering mechanism is arranged in the flow dividing pipe, and a liquid discharging pipe is arranged in the filtering mechanism. A mounting pipe is fixedly connected to the interior of the liquid discharging pipe, a notch is formed in the surface of the mounting pipe, and the filtering mechanism comprises a pressure adjusting assembly and a filtering assembly which are arranged in the mounting pipe; by arranging the pressure adjusting assembly, the effect of self-adaption to water pressure can be achieved, uniform flow speed is guaranteed, the filtering assembly can be well utilized for filtering, the filtering effect is improved, when pressure is too large, the circulation section can be increased, the water pressure can be reduced, damage caused by too large water pressure is avoided, and when pressure is small, the circulation section can be reduced, and the water pressure can be improved; the flow velocity is uniform; and the subsequent filtering effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of filters, and specifically discloses a PPRY type pre-filter. Background Art

[0002] The Y-type pre-filter, also known as a dirt remover and a filter valve, is an indispensable device at the inlet end of a pipeline system for conveying media. Its function is to filter mechanical impurities in the media, and it can filter rust, sand grains in sewage, and a small amount of solid particles in liquids, etc., to protect the fittings on the equipment pipeline from wear and blockage, and can protect the normal operation of the equipment. However, for the existing Y-type pre-filter, after a long time of use, there are more impurities adhered to the filter surface of the internal filter screen and need to be manually cleaned. And due to too many adhered impurities, it affects the flow of water through, easily causing the water pressure to rise and resulting in damage to the pipeline. Summary of the Invention

[0003] In view of this, the technical problem to be solved by the present invention is to propose a PPRY type pre-filter to solve the problem that after long-term use of the existing technology, too many adhered impurities affect the flow of water through, easily causing the water pressure to rise and resulting in damage to the pipeline.

[0004] To achieve the above object, the present invention provides a PPRY type pre-filter, including a connecting pipe and a shunt pipe. The shunt pipe is communicated with the surface of the connecting pipe and is inclined. The other end of the shunt pipe is provided with a drain pipe. The surface of the shunt pipe is provided with a controller. A filtering mechanism is arranged inside the shunt pipe. An installation pipe is fixedly connected inside the drain pipe, and a notch is opened on the surface of the installation pipe; The filtering mechanism includes a pressure regulating component and a filtering component arranged inside the installation pipe. The pressure regulating component can introduce water into the filtering component for filtering.

[0005] In the above technical solution, preferably, the pressure regulating component includes an installation ring fixedly connected to the inner wall of the installation pipe. One side of the installation ring close to the drain pipe is fixedly connected with an installation cylinder. The inner wall of the installation cylinder is fixedly connected with a filter frame. An adjusting bladder is arranged inside the filter frame. A discharge area is formed between the outer side of the installation cylinder and the inner wall of the installation pipe.

[0006] In the above technical solution, preferably, a connecting cylinder is fixedly connected to the surface of the installation pipe. The other end of the connecting cylinder penetrates out of the shunt pipe. An adjusting cavity is opened inside the connecting cylinder. A pressure regulating plate is slidably connected to the inner wall of the adjusting cavity. Hydraulic oil is filled between one side of the pressure regulating plate close to the installation pipe and the inside of the adjusting cavity. One end of the connecting cylinder is provided with a conduit communicated with the adjusting cavity, and the other end of the conduit is communicated with the adjusting bladder.

[0007] In the above technical solution, preferably, an installation block is fixedly connected to the inner wall of the adjustment cavity. A pressure sensor is embedded on the side of the installation block close to the adjustment plate. A buffer plate is arranged on the surface of the adjustment plate. One side of the buffer plate is in contact with the surface of the pressure sensor, and a spring is fixedly connected between the other side of the buffer plate and the adjustment plate.

[0008] In the above technical solution, preferably, the filtering assembly includes a partition ring fixedly connected to the inner wall of the installation pipe. The top of the partition ring is fixedly connected to the bottom of the installation cylinder. Through grooves communicating with the discharge area are formed on the surface of the partition ring. The inner side of the partition ring communicates with the installation cylinder. A rotating ring is rotatably connected to the bottom of the partition ring. Connection grooves corresponding to the through grooves are formed on the surface of the rotating ring.

[0009] In the above technical solution, preferably, a fixing plate located on the side of the partition ring away from the installation cylinder is fixedly connected to the inner wall of the installation pipe. One end of the drain pipe is fixedly connected to the surface of the fixing plate, and two symmetrically distributed drain holes are formed on the surface of the fixing plate. The drain holes communicate with the drain pipe. A fixing ring is fixedly connected to the side of the fixing plate close to the partition ring. The inner side of the fixing ring communicates with the inner side of the rotating ring. Two symmetrically distributed first filter meshes are embedded on the surface of the fixing ring. Two second filter meshes staggered with the first filter meshes are embedded on the surface of the fixing ring.

[0010] In the above technical solution, preferably, two symmetrically distributed connection shells are arranged on the surface of the fixing ring. The upper end of the connection shell is fixedly connected to the top of the rotating ring. The bottom of the connection shell is in contact with the top of the fixing plate. A communication area is formed between the inner side of the connection shell and the surface of the fixing ring. A partition plate is fixedly connected to the inner side of the connection shell. Uniformly distributed through holes are formed on the surface of the partition plate. Check valves are arranged inside the through holes.

[0011] In the above technical solution, preferably, a motor is arranged inside the fixing plate. The output shaft of the motor is fixedly connected to a rotating shaft. The upper end of the rotating shaft penetrates out of the fixing plate and extends into the inside of the fixing ring. Four annularly distributed mounting plates are fixedly connected to the surface of the rotating shaft. A partition area is formed between two adjacent mounting plates. The inner side of the mounting plate is in contact with the inner wall of the fixing ring. First baffles are fixedly connected to the inner walls of two symmetrically arranged partition areas. The outer side of the first baffle is fixedly connected to the inner side of the rotating ring. Second baffles are fixedly connected to the inner walls of the other two symmetrically arranged partition areas. The bottom of the second baffle is in contact with the surface of the fixing plate. Connection holes are formed on the surface of the mounting plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting the pressure regulating component, the effect of adapting to the water pressure can be achieved, ensuring uniform flow velocity so that the filtering component can be well utilized for filtration, improving the filtration effect. When the pressure is too high, it can increase the flow cross-section to reduce the water pressure, avoiding damage caused by excessive water pressure. When the pressure is relatively low, it can reduce the flow cross-section to increase the water pressure, ensuring uniform flow velocity and improving the subsequent filtration effect.

[0013] 2. By setting the filtering component, the motor can be started to drive the rotation of the rotating shaft, adjusting the positions of the second baffle and the first baffle so that the water filtered by the second filter screen can pass through the partition plate and then backwash the first filter screen in the reverse direction. The setting of the one-way valve can ensure that the water will not flow from the first filter screen along the communication area towards the second filter screen, ensuring a good backwashing effect, and the impurities washed can be discharged through the drain hole along with the water flow.

[0014] 3. By setting the filtering mechanism, under the action of the filtering mechanism, when the pressure sensor can detect the pressure, when the pressure is greater than the threshold value, the signal is transmitted to the controller. Then, after the controller receives the overpressure signal transmitted by the pressure sensor, it can actively start the motor to drive the rotation of the rotating shaft, achieving the purpose of directly discharging the water flow through the drain pipe, avoiding damage to the pipeline caused by overpressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic sectional view of the present invention; Figure 3 is a schematic connection diagram of the filtering mechanism and the installation pipe of the present invention; Figure 4 is a schematic structural diagram of the pressure regulating component of the present invention; Figure 5 is a schematic distribution diagram of the through groove and the connection groove of the present invention; Figure 6 is a schematic distribution diagram of the first filter screen and the second filter screen of the present invention; Figure 7 is a schematic connection diagram of the connection shell and the partition plate of the present invention; Figure 8 is a schematic distribution diagram of the installation plate of the present invention.

[0016] In the figure: 1. Connecting pipe; 101. Diverting pipe; 102. Drain pipe; 103. Installation pipe; 104. Notch; 2. Controller; 3. Filter mechanism; 31. Pressure regulating component; 3101. Installation ring; 3102. Installation cylinder; 3103. Filter frame; 3104. Adjusting bladder; 3105. Conduit; 3106. Pressure regulating plate; 3107. Installation block; 3108. Connecting cylinder; 3109. Pressure sensor; 3110. Buffer plate; 3111. Spring; 3112. Adjusting cavity; 32. Filter component; 3201. Partition ring; 3202. Through slot; 3203. Connecting slot; 3204. Fixed plate; 3205. First baffle; 3206. Rotating ring; 3207. First filter screen; 3208. Motor; 3209. Connecting shell; 3210. Partition plate; 3211. Check valve; 3212. Fixed ring; 3213. Second filter screen; 3214. Installation plate; 3215. Drain hole; 3216. Second baffle; 3217. Rotating shaft. Detailed implementation mode

[0017] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0018] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the limitations of the specific embodiments disclosed below.

[0019] As Figures 1-8 shown, a PPRY type pre-filter includes a connecting pipe 1 and a diverting pipe 101. The diverting pipe 101 communicates with the surface of the connecting pipe 1 and is inclined. The other end of the diverting pipe 101 is provided with a drain pipe 102. The surface of the diverting pipe 101 is provided with a controller 2. A filter mechanism 3 is arranged inside the diverting pipe 101. An installation pipe 103 is fixedly connected inside the drain pipe 102, and a notch 104 is formed on the surface of the installation pipe 103; The filter mechanism 3 includes a pressure regulating component 31 and a filter component 32 arranged inside the installation pipe 103. The pressure regulating component 31 can introduce water into the filter component 32 for filtration.

[0020] As Figures 1-8 shown, the pressure regulating component 31 includes an installation ring 3101 fixedly connected to the inner wall of the installation pipe 103. One side of the installation ring 3101 close to the drain pipe 102 is fixedly connected with an installation cylinder 3102. The inner wall of the installation cylinder 3102 is fixedly connected with a filter frame 3103. An adjusting bladder 3104 is arranged inside the filter frame 3103. A discharge area is formed between the outer side of the installation cylinder 3102 and the inner wall of the installation pipe 103.

[0021] The surface of the installation pipe 103 is fixedly connected with a connecting cylinder 3108. The other end of the connecting cylinder 3108 penetrates out of the shunt pipe 101. An adjustment cavity 3112 is formed inside the connecting cylinder 3108. A pressure regulating plate 3106 is slidably connected to the inner wall of the adjustment cavity 3112. Hydraulic oil is filled between the side of the pressure regulating plate 3106 close to the installation pipe 103 and the inside of the adjustment cavity 3112. One end of the connecting cylinder 3108 is provided with a conduit 3105 communicating with the adjustment cavity 3112. The other end of the conduit 3105 communicates with the adjustment bladder 3104.

[0022] The inner wall of the adjustment cavity 3112 is fixedly connected with a mounting block 3107. A pressure sensor 3109 is embedded on the side of the mounting block 3107 close to the pressure regulating plate 3106. A buffer plate 3110 is arranged on the surface of the pressure regulating plate 3106. One side of the buffer plate 3110 is in contact with the surface of the pressure sensor 3109. A spring 3111 is fixedly connected between the other side of the buffer plate 3110 and the pressure regulating plate 3106.

[0023] Water enters from Figure 1 After entering from the right side, it can enter the inside of the installation cylinder 3102 through the inside of the installation ring 3101. During this process, the setting of the filter frame 3103 can prevent the impurities in the water from rubbing against the surface of the adjustment bladder 3104 and causing damage to the adjustment bladder 3104. After the water flow enters the inside of the installation ring 3101, the adjustment bladder 3104 can be pressurized by the water pressure. When the water pressure is too high, the hydraulic oil inside the adjustment bladder 3104 can be squeezed to be injected into the inside of the adjustment cavity 3112 through the conduit 3105. During this process, the injected hydraulic oil can be used to push the pressure regulating plate 3106 to move towards the buffer plate 3110, and at the same time compress the spring 3111 (the spring 3111 in the normal state is used to maintain the position of the pressure regulating plate 3106, so as to maintain the volume of the adjustment bladder 3104 under the normal water pressure). At the same time, after the spring 3111 is compressed, it can exert pressure on the buffer plate 3110. During this process, the pressure sensor 3109 can detect the pressure. When the pressure is greater than the threshold value, a signal is transmitted to the controller 2. At the same time, due to the contraction of the adjustment bladder 3104, the internal space of the installation cylinder 3102 can be increased to achieve the effect of increasing the flow cross-section and reducing the water pressure, avoiding damage caused by excessive water pressure. When the water pressure is too low, the adjustment bladder 3104 is less pressurized. At this time, under the action of the spring 3111, the pressure regulating plate 3106 can be pushed to move towards the adjustment bladder 3104, so as to push the hydraulic fluid stored inside the adjustment cavity 3112 to be injected through the conduit 3105, thereby increasing the volume of the adjustment bladder 3104 (as Figure 4 shown is the maximum volume of the adjustment bladder 3104), reducing its flow cross-section and increasing the water pressure, so as to achieve the effect of adapting to the water pressure, ensuring uniform flow velocity, enabling it to make good use of the filter assembly 32 for filtration, and improving the filtration effect.

[0024] like Figures 1-8 As shown, the filter assembly 32 includes a separating ring 3201 fixedly connected to the inner wall of the mounting tube 103, the top of the separating ring 3201 is fixedly connected to the bottom of the mounting tube 3102, the surface of the separating ring 3201 is provided with a through groove 3202 connected to the discharge area, the inner side of the separating ring 3201 is connected to the mounting tube 3102, the bottom of the separating ring 3201 is rotatably connected to a rotating ring 3206, and the surface of the rotating ring 3206 is provided with a connecting groove 3203 corresponding to the through groove 3202.

[0025] The inner wall of the mounting tube 103 is fixedly connected to a fixing plate 3204 located on the side of the separating ring 3201 away from the mounting tube 3102, one end of the drain tube 102 is fixedly connected to the surface of the fixing plate 3204, and the surface of the fixing plate 3204 is provided with two symmetrically distributed drain holes 3215, the drain holes 3215 are communicated with the drain tube 102, a fixing ring 3212 is fixedly connected to the side of the fixing plate 3204 close to the separating ring 3201, the inner side of the fixing ring 3212 is communicated with the inner side of the rotating ring 3206, two symmetrically distributed first filter screens 3207 are embedded on the surface of the fixing ring 3212, and two second filter screens 3213 are embedded on the surface of the fixing ring 3212 and are staggered with the first filter screens 3207.

[0026] The surface of the fixed ring 3212 is provided with two symmetrically distributed connecting shells 3209, the upper end of the connecting shell 3209 is fixedly connected to the top of the rotating ring 3206, the bottom of the connecting shell 3209 is in contact with the top of the fixed plate 3204, and a connecting area is formed between the inner side of the connecting shell 3209 and the surface of the fixed ring 3212. The inner side of the connecting shell 3209 is fixedly connected with a partition plate 3210, and the surface of the partition plate 3210 is provided with evenly distributed through holes, and a one-way valve 3211 is provided inside the through hole.

[0027] A motor 3208 is arranged inside the fixed plate 3204, and the output shaft of the motor 3208 is fixedly connected to the rotating shaft 3217. The upper end of the rotating shaft 3217 passes through the fixed plate 3204 and extends to the inside of the fixed ring 3212. Four mounting plates 3214 distributed in a ring are fixedly connected to the surface of the rotating shaft 3217. A separation area is formed between two adjacent mounting plates 3214. The inner side of the mounting plate 3214 contacts the inner wall of the fixed ring 3212, and the inner walls of two symmetrically arranged separation areas are fixedly connected to the first baffle plate 3205. The outer side of the first baffle plate 3205 is fixedly connected to the inner side of the rotating ring 3206. The inner walls of the other two symmetrically arranged separation areas are fixedly connected to the second baffle plate 3216. The bottom of the second baffle plate 3216 contacts the surface of the fixed plate 3204, and a connecting hole is opened on the surface of the mounting plate 3214.

[0028] The water passing through the mounting cylinder 3102 can enter the inner side of the fixing ring 3212. The connection holes are provided to ensure that the water can pass through the mounting plate 3214 and flow in each partition area normally. After passing through the first filter screen 3207 and the second filter screen 3213, the sundries are intercepted inside the fixing ring 3212, and are introduced and discharged through the connection groove 3203 and the through groove 3202 and finally discharged through the notch 104. However, due to the setting of the connection shell 3209, the water passing through the second filter screen 3213 cannot be discharged, so it will not cause too much filtration burden on the second filter screen 3213, while the first filter screen 3207 will bear more filtration burden. With the long-term filtration, it is necessary to filter the first filter screen 3207 and the second filter screen 3213 regularly. By starting the motor 3208, the rotating shaft 3217 can be driven to rotate. During this process, the mounting plate 3214 can be driven to move synchronously by the rotating shaft 3217, and the positions of the first baffle 3205 and the second baffle 3216 can be adjusted. The setting of the first baffle 3205 is used to drive the movement of the rotating ring 3206 synchronously. Under normal conditions, the second baffle 3216 blocks the liquid discharge hole 3215, and the connection groove 3203 and the through groove 3202 are communicated. When the motor 3208 is started, with the adjustment of the positions of the second baffle 3216 and the first baffle 3205, the connection groove 3203 can be misaligned with the through groove 3202, and at the same time, the liquid discharge hole 3215 is no longer blocked. And during the rotation of the mounting plate 3214, the inner sides of the first filter screen 3207 and the second filter screen 3213 can be cleaned. At the same time, since the connection shell 3209 can rotate synchronously with the rotating ring 3206, the water filtered by the second filter screen 3213 can pass through the partition plate 3210 and backwash the first filter screen 3207 in the reverse direction. The setting of the one-way valve 3211 can ensure that the water does not flow from the first filter screen 3207 along the communication area towards the second filter screen 3213, ensuring a good backwashing effect. And the impurities washed can be discharged through the liquid discharge hole 3215 along with the water flow. After 10 minutes of flushing, the motor 3208 drives the rotating shaft 3217 to rotate back to its original position, and the normal water flow is carried out; And after the controller 2 receives the overpressure signal transmitted by the pressure sensor 3109, it can actively start the motor 3208 to drive the rotating shaft 3217 to rotate, so as to directly discharge the water flow through the drain pipe 102, avoiding damage to the pipeline caused by overpressure.

[0029] Working principle: After the water flow enters the inside of the installation ring 3101, the regulating bladder 3104 can be pressurized by the water pressure. Due to the contraction of the regulating bladder 3104, the internal space of the installation cylinder 3102 can be increased, achieving the effect of increasing the flow cross-section and reducing the water pressure, and avoiding damage caused by excessive water pressure. When the pressure is greater than the threshold, a signal is transmitted to the controller 2. When the water pressure is too small, the regulating bladder 3104 is less pressurized. At this time, under the action of the spring 3111, the regulating plate 3106 can be pushed to move towards the regulating bladder 3104, thereby pushing the hydraulic fluid stored inside the regulating cavity 3112 to be injected through the conduit 3105, and then increasing the volume of the regulating bladder 3104 (as Figure 4 shown is the maximum volume of the regulating bladder 3104), reducing its flow cross-section and increasing the water pressure, so as to achieve the effect of self-adaptive water pressure, ensuring uniform flow rate and enabling it to make good use of the filtering component 32 for filtering, improving the filtering effect. After long-term filtering, by starting the motor 3208, the rotating shaft 3217 can be driven to rotate, adjusting the positions of the second baffle 3216 and the first baffle 3205, enabling the connecting groove 3203 to be misaligned with the through groove 3202, and at the same time no longer blocking the drain hole 3215. And during the rotation of the mounting plate 3214, the inner sides of the first filter screen 3207 and the second filter screen 3213 can be cleaned. At the same time, since the connecting shell 3209 can rotate synchronously with the rotating ring 3206, the water filtered by the second filter screen 3213 can pass through the partition plate 3210 and then backwash the first filter screen 3207 in the reverse direction. The setting of the one-way valve 3211 can ensure that the water will not flow from the first filter screen 3207 along the communication area towards the second filter screen 3213, ensuring a good backwashing effect. And the impurities flushed can be discharged through the drain hole 3215 along with the water flow. After flushing for 10 minutes, the motor 3208 drives the rotating shaft 3217 to rotate and reset, and normal water flow is carried out.

[0030] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A PPRY type pre-filter, comprising a connecting pipe (1) and a shunt pipe (101), characterized in that, The shunt pipe (101) is connected to the surface of the connecting pipe (1) and is inclined. The other end of the shunt pipe (101) is provided with a drain pipe (102). A controller (2) is arranged on the surface of the shunt pipe (101). A filtering mechanism (3) is arranged inside the shunt pipe (101). An installation pipe (103) is fixedly connected inside the drain pipe (102). A notch (104) is formed on the surface of the installation pipe (103). The filtering mechanism (3) includes a pressure regulating component (31) and a filtering component (32) arranged inside the installation pipe (103). The pressure regulating component (31) can introduce water into the filtering component (32) for filtering.

2. The PPRY type pre-filter according to claim 1, characterized in that, The pressure regulating component (31) includes an installation ring (3101) fixedly connected to the inner wall of the installation pipe (103). A mounting cylinder (3102) is fixedly connected to the side of the mounting ring (3101) close to the drain pipe (102). A filter frame (3103) is fixedly connected to the inner wall of the mounting cylinder (3102). An adjusting bladder (3104) is arranged inside the filter frame (3103). A discharge area is formed between the outer side of the mounting cylinder (3102) and the inner wall of the installation pipe (103).

3. The PPRY type pre-filter according to claim 2, characterized in that, A connecting cylinder (3108) is fixedly connected to the surface of the installation pipe (103). The other end of the connecting cylinder (3108) penetrates out of the shunt pipe (101). An adjusting cavity (3112) is formed inside the connecting cylinder (3108). A pressure regulating plate (3106) is slidably connected to the inner wall of the adjusting cavity (3112). Hydraulic oil is filled between the side of the pressure regulating plate (3106) close to the installation pipe (103) and the inside of the adjusting cavity (3112). A conduit (3105) communicating with the adjusting cavity (3112) is arranged at one end of the connecting cylinder (3108). The other end of the conduit (3105) is communicated with the adjusting bladder (3104).

4. The PPRY type pre-filter according to claim 3, characterized in that, A mounting block (3107) is fixedly connected to the inner wall of the adjusting cavity (3112). A pressure sensor (3109) is embedded and installed on the side of the mounting block (3107) close to the pressure regulating plate (3106). A buffer plate (3110) is arranged on the surface of the pressure regulating plate (3106). One side of the buffer plate (3110) is in contact with the surface of the pressure sensor (3109). A spring (3111) is fixedly connected between the other side of the buffer plate (3110) and the pressure regulating plate (3106).

5. The PPRY type pre-filter according to claim 2, wherein, The filtering component (32) includes a partition ring (3201) fixedly connected to the inner wall of the installation pipe (103). The top of the partition ring (3201) is fixedly connected to the bottom of the mounting cylinder (3102). A through groove (3202) communicating with the discharge area is formed on the surface of the partition ring (3201). The inner side of the partition ring (3201) is communicated with the mounting cylinder (3102). A rotating ring (3206) is rotatably connected to the bottom of the partition ring (3201). A connecting groove (3203) corresponding to the through groove (3202) is formed on the surface of the rotating ring (3206).

6. The PPRY type pre-filter according to claim 5, characterized in that, The inner wall of the installation pipe (103) is fixedly connected with a fixing plate (3204) located on the side of the partition ring (3201) away from the installation cylinder (3102). One end of the drain pipe (102) is fixedly connected to the surface of the fixing plate (3204), and the surface of the fixing plate (3204) is provided with two symmetrically distributed drain holes (3215). The drain holes (3215) communicate with the drain pipe (102). The side of the fixing plate (3204) close to the partition ring (3201) is fixedly connected with a fixing ring (3212). The inner side of the fixing ring (3212) communicates with the inner side of the rotating ring (3206). The surface of the fixing ring (3212) is embedded with two symmetrically distributed first filter screens (3207). The surface of the fixing ring (3212) is embedded with two second filter screens (3213) that are staggeredly distributed with the first filter screens (3207).

7. The PPRY type pre-filter according to claim 6, characterized in that, The surface of the fixing ring (3212) is provided with two symmetrically distributed connecting shells (3209). The upper end of the connecting shell (3209) is fixedly connected to the top of the rotating ring (3206). The bottom of the connecting shell (3209) is in contact with the top of the fixing plate (3204). A communication area is formed between the inner side of the connecting shell (3209) and the surface of the fixing ring (3212). The inner side of the connecting shell (3209) is fixedly connected with a partition plate (3210). The surface of the partition plate (3210) is provided with uniformly distributed through holes, and one-way valves (3211) are arranged inside the through holes.

8. A PPRY type pre-filter according to claim 7, characterized in that, A motor (3208) is arranged inside the fixing plate (3204). The output shaft of the motor (3208) is fixedly connected with a rotating shaft (3217). The upper end of the rotating shaft (3217) penetrates out of the fixing plate (3204) and extends into the inside of the fixing ring (3212). The surface of the rotating shaft (3217) is fixedly connected with four annularly distributed mounting plates (3214). A partition area is formed between two adjacent mounting plates (3214). The inner side of the mounting plate (3214) is in contact with the inner wall of the fixing ring (3212). The inner walls of two symmetrically arranged partition areas are fixedly connected with first baffles (3205). The outer side of the first baffle (3205) is fixedly connected to the inner side of the rotating ring (3206). The inner walls of the other two symmetrically arranged partition areas are fixedly connected with second baffles (3216). The bottom of the second baffle (3216) is in contact with the surface of the fixing plate (3204). Connecting holes are provided on the surface of the mounting plate (3214).

Images