Anti-siphon non-return outlet nozzle and pressure relief pump

Abstract

The utility model discloses a kind of anti-siphon non-return flow outlet liquid nozzle and pressure relief pump.Pressure relief nozzle includes pressure relief pipe, second spring, plug and second plug cover.Pressure relief pump includes shell, pump core device, driving assembly, inlet liquid nozzle, outlet liquid nozzle, pressure relief nozzle.When connecting pipeline, liquid backflow, from the inner wall between the pipeline of first plug cover, it will not overflow from the first annular reverse buckle;Relative to the traditional reverse buckle ring, it is not necessary to additionally set sealing ring, and liquid leakage phenomenon can also be avoided.In the lower of first plug cover, first annular reverse buckle is designed, and first annular reverse buckle is used to form sealing with pipeline;Two sealing rings are assembled in process, and assembly process and cost are simplified;Two sealing rings are also used in the cost of raw material cost, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pump equipment, specifically to an anti-siphon backflow nozzle and a pressure relief pump. Background Technology

[0002] Electric miniature diaphragm pumps are widely used in water industry, agriculture, medical, automotive, shipbuilding and other industries. They use the rotation of the motor to drive the transmission device, which causes the diaphragm to generate piston-like transmission. The piston-like movement of the diaphragm compresses the volume in the diaphragm cavity to achieve the function of pumping liquid.

[0003] The existing nozzle structure requires the addition of a sealing ring to achieve the full functionality of the product design, which increases the material cost, complicates the process, and increases production costs. Utility Model Content

[0004] According to one aspect of the present invention, an anti-siphon backflow nozzle is provided.

[0005] The dispensing nozzle includes a dispensing tube, a first spring, a steel ball, and a first plug. The first plug is fitted inside the dispensing tube and located at the outlet end of the dispensing tube, with a portion of the first plug exposed outside the dispensing tube. The steel ball is located inside the dispensing tube and located at the inlet end of the dispensing tube. The first spring is located inside the dispensing tube and located between the first plug and the steel ball, and the first spring acts between the dispensing tube and the steel ball. The outer wall of the dispensing tube is provided with a first annular buckle, which is located on the side of the exposed portion of the first plug closer to the inlet end of the dispensing tube.

[0006] In some embodiments, the outer wall of the first plug is provided with a flow guiding groove, which is located at one end of the first plug near the inside of the liquid outlet pipe. The outer wall of the liquid outlet pipe is provided with a flow guiding hole, which is located on the liquid outlet pipe near the outlet end.

[0007] As a result, the drained liquid flows back from the guide ring groove and guide hole to the outer pipe of the outlet nozzle.

[0008] In some embodiments, the first plug includes an installation part and a limiting part. The limiting part is located above the installation part. The installation part has a liquid outlet channel at its axial position. The installation part is sleeved inside the liquid outlet pipe, and the limiting part is exposed outside the liquid outlet pipe.

[0009] Thus, the first cover consists of the structure described above.

[0010] In some embodiments, the outer wall of the first plug is provided with a number of locking blocks, and the inner wall of the liquid outlet pipe is provided with a number of locking grooves corresponding to the locking blocks, the locking grooves being "L" shaped.

[0011] Thus, the first cover is assembled by inserting a locking block into an "L"-shaped slot.

[0012] In some embodiments, the interior of the outlet tube is configured with a first cavity, a second cavity, and a third cavity, which are arranged sequentially and connected from the outlet end to the inlet end.

[0013] The first and third lumens are straight sections, the second lumen is conical, and the second and third lumens are connected by an inclined plane.

[0014] This ensures that the steel ball returns to its stable position.

[0015] An anti-siphon backflow pressure relief pump also includes a pressure relief nozzle, which is located on the outer wall of the outlet nozzle and communicates with the outlet nozzle.

[0016] The pressure relief nozzle includes a pressure relief pipe, a second spring, a plug, and a second cap. The second cap is fitted inside the pressure relief pipe and located at the outlet end of the pressure relief pipe. A portion of the second cap is exposed outside the pressure relief pipe. The plug is located inside the pressure relief pipe and located at the inlet end of the pressure relief pipe. The second spring is located inside the pressure relief pipe and between the second cap and the plug. The second spring acts between the pressure relief pipe and the plug. The outer wall of the pressure relief pipe is provided with a second annular buckle, which is located on the side of the exposed portion of the second cap closer to the inlet end of the pressure relief pipe.

[0017] Therefore, a pressure relief device is added at the outlet. When the pressure at the pump outlet is too high, the pressure relief device will automatically open.

[0018] In some implementations, the pressure relief nozzle extends laterally, and the liquid outlet extends vertically.

[0019] Therefore, the pressure relief nozzle and liquid outlet are distributed as described above.

[0020] Another aspect of this utility model also provides a pressure relief pump, including the aforementioned anti-siphon check valve, and further comprising a housing, a pump core assembly, a drive assembly, and an inlet valve.

[0021] The pump core assembly is located inside the housing; the drive assembly is located on the housing and is connected to the pump core assembly for driving force, and is configured to provide driving force to the pump valve assembly. The inlet and outlet nozzles are both located on the pump housing.

[0022] This invention provides a pressure relief pump that prevents siphon backflow. In this pressure relief pump, the drive assembly drives the pump core device, creating a volume difference within the housing. Liquid enters through the inlet and exits through the outlet. A steel ball and a first spring prevent the outlet medium from flowing back into the pump, thus preventing siphoning. When the outlet is connected to a pipe, the first annular buckle is positioned away from the pipe from the first plug. During backflow, liquid flows out from the inner wall between the pipe and the first plug, preventing overflow from the first annular buckle. Compared to traditional buckle rings, this design eliminates the need for an additional sealing ring, thus preventing liquid leakage.

[0023] The housing includes a cover, a sealing ring, a main body, an upper bracket, and a lower bracket. The cover is located at the upper end of the main body, the sealing ring is located on the main body and acts between the cover and the sealing ring, the upper bracket is located at the lower end of the main body, and the lower bracket is located at the lower end of the upper bracket.

[0024] The pump core device is located inside the main body, and the drive component is located at the lower end of the lower bracket. The drive component penetrates the upper bracket and is connected to the pump core device for drive. The inlet and outlet nozzles are both located on the outer side of the cover.

[0025] Therefore, the shell is composed of the above-described structure.

[0026] In some embodiments, the pump core assembly includes a check valve, a piston, and several umbrella valves. The piston is located on the main body and penetrates the upper bracket to be driven and connected to the drive assembly. The several umbrella valves are all located on the main body and embedded in the piston. The check valve is located between the main body and the cover.

[0027] Therefore, the pump core assembly consists of the above-described structure.

[0028] In some embodiments, the drive assembly includes a motor, an eccentric wheel, a swing frame, and a drive shaft. The motor is located at the lower end of the lower support, the eccentric wheel is located at the drive end of the motor, the swing frame is connected to the eccentric wheel via the drive shaft, and the swing frame is drivenly connected to the pump core device.

[0029] Therefore, the drive component consists of the structure described above.

[0030] A first annular buckle is designed below the first plug; this buckle forms a seal with the pipe. This reduces the need for assembling two sealing rings, simplifying the assembly process and reducing costs. It also reduces material costs by eliminating the use of two sealing rings. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of an anti-siphon backflow relief pump according to one embodiment of the present invention.

[0032] Figure 2 for Figure 1 The diagram shows a three-dimensional structural schematic of an anti-siphon backflow relief pump in an explosive state.

[0033] Figure 3 for Figure 1 The diagram shown is a front view of an anti-siphon backflow relief pump.

[0034] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along the AA direction.

[0035] Figure 5 for Figure 4 A magnified schematic diagram of a portion of the structure.

[0036] Figure 6 for Figure 4 A schematic diagram of the greywater recirculation path.

[0037] Figure 7 for Figure 1 The diagram shows a three-dimensional structural representation of the inlet and outlet nozzles of an anti-siphon backflow pressure relief pump in an explosive state.

[0038] Figure 8 for Figure 1 The diagram shows a three-dimensional structural representation of the explosion state of the sealing part in an anti-siphon backflow pressure relief pump.

[0039] Figure 9 for Figure 1 The diagram shows a three-dimensional structural representation of the pump core in an anti-siphon backflow relief pump, in an explosive state.

[0040] Figure 10 for Figure 1 The diagram shows a three-dimensional structural representation of the explosive state of the drive section in an anti-siphon backflow relief pump.

[0041] Labels in the diagram: 100-Shell, 110-Cover, 120-Sealing ring, 121-Outer ring, 122-Inner ring, 123-Connecting strip, 124-First ridge, 125-Second ridge, 126-Positioning through hole, 130-Main body, 131-Enclosure plate, 132-Inner groove, 133-Outer groove, 134-Discharge hole, 135-Suction hole, 136-First boss, 137-Mounting post, 138-First valley, 139-Second valley; 140-Upper bracket, 141-Mounting hole, 150-Lower bracket, 200-Pump core assembly, 210-Check valve, 211-Second boss, 212-Shielding part; 213-Reinforcing rib, 220-Piston, 221-Groove, 222-Diaphragm chamber, 230-Umbrella Valve, 300-Drive assembly, 310-Motor, 320-Eccentric wheel, 330-Swing frame, 340-Drive shaft, 400-Inlet nozzle, 500-Outlet nozzle, 510-Outlet pipe, 511-First annular buckle, 512-Slot, 513-First cavity, 514-Second cavity, 515-Third cavity, 516-Inclined surface, 517-Guide hole, 520-First spring, 530-Steel ball, 540-First plug, 541-Guide ring groove, 542-Mounting part, 543-Limiting part, 544-Outlet channel, 545-Block, 600-Pressure relief nozzle, 610-Pressure relief pipe, 611-Second annular buckle, 620-Second spring, 630-Plug, 640-Second plug. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings.

[0043] Figure 1-2 This diagram schematically illustrates an anti-siphon backflow pressure relief pump according to one embodiment of the present invention, comprising a housing 100, a pump core assembly 200, a drive assembly 300, an inlet nozzle 400, an outlet nozzle 500, and a pressure relief nozzle 600. The housing 100 is fixedly disposed; the pump core assembly 200 is disposed within the housing 100; the drive assembly 300 is disposed on the housing 100 and drivenly connected to the pump core assembly 200, configured to provide driving force to the pump valve assembly; the inlet nozzle 400 and the outlet nozzle 500 are both disposed on the pump housing 100, and are dynamically connected through the pump core assembly 200; under the drive of the drive assembly 300, the pump core assembly 200 operates, creating a volume difference inside the housing 100, allowing liquid to enter through the inlet nozzle 400 and exit through the outlet nozzle 500. The pressure relief nozzle 600 is disposed on the outer wall of the outlet nozzle 500 and communicates with the outlet nozzle 500.

[0044] Combination Figure 3-7 The dispensing nozzle 500 includes a dispensing tube 510, a first spring 520, a steel ball 530, and a first plug 540. The first plug 540 is sleeved inside the dispensing tube 510 and located at the outlet end of the dispensing tube 510. A portion of the first plug 540 is exposed outside the dispensing tube 510. The steel ball 530 is disposed inside the dispensing tube 510 and located at the inlet end of the dispensing tube 510. The first spring 520 is disposed inside the dispensing tube 510 and located between the first plug 540 and the steel ball 530. The first spring 520 acts between the dispensing tube 510 and the steel ball 530. The outer wall of the dispensing tube 510 is provided with a first annular buckle 511. The first annular buckle 511 is located on the side of the exposed portion of the first plug 540 near the inlet end of the dispensing tube 510.

[0045] Combination Figure 3-7 The outer wall of the first plug 540 is provided with a flow-guiding annular groove 541, which is located at one end of the first plug 540 near the inside of the outlet pipe 510. The outer wall of the outlet pipe 510 is provided with a flow-guiding hole 517; the flow-guiding hole 517 is located on the outlet pipe 510 near the outlet end, that is, above the first annular inverted buckle 511. In the event of siphoning, the returning liquid flows back from the flow-guiding annular groove 541 and the flow-guiding hole 517 into the outer pipe of the outlet nozzle 500.

[0046] Combination Figure 5-7 The first plug 540 includes a mounting part 542 and a limiting part 543. The limiting part 543 is located above the mounting part 542. A liquid outlet channel 544 is provided at the axial position of the mounting part 542. The mounting part 542 is sleeved inside the liquid outlet pipe 510, and the limiting part 543 is exposed outside the liquid outlet pipe 510. The first plug 540 is composed of the above-described structure.

[0047] Combination Figure 5-7The outer wall of the first cap 540 is provided with several locking blocks 545, and the inner wall of the outlet pipe 510 is provided with several locking grooves 512 corresponding to the locking blocks 545. The locking grooves 512 are "L" shaped. The first cap 540 is assembled by inserting the locking blocks 545 into the "L" shaped locking grooves 512. In this embodiment, for ease of processing, the locking grooves 512 and the guide holes 517 are integrated into a single structure. That is, after the locking grooves 512 and the locking blocks 545 are engaged, the remaining gap forms the guide holes.

[0048] Combination Figure 5-7 The internal structure of the outlet pipe 510 is configured with a first cavity 513, a second cavity 514, and a third cavity 515. These cavities are arranged sequentially from the outlet end to the inlet end and are interconnected. The first cavity 513 and the third cavity 515 are straight sections, while the second cavity 514 is a conical cavity. The second cavity 514 and the third cavity 515 are connected by an inclined plane 516. This configuration ensures the stable return of the steel ball 530 to its designated position.

[0049] Combination Figure 5-7 The pressure relief nozzle 600 includes a pressure relief pipe 610, a second spring 620, a plug 630, and a second cap 640. The second cap 640 is fitted inside the pressure relief pipe 610 and located at the outlet end of the pressure relief pipe 610, with a portion of the second cap 640 exposed outside the pressure relief pipe 610. The plug 630 is located inside the pressure relief pipe 610 and located at the inlet end of the pressure relief pipe 610. The second spring 620 is located inside the pressure relief pipe 610 and between the second cap 640 and the plug 630, acting between the pressure relief pipe 610 and the plug 630. The outer wall of the pressure relief pipe 610 is provided with a second annular buckle 611, located on the side of the exposed portion of the second cap 640 near the inlet end of the pressure relief pipe 610. A pressure relief device is added at the outlet; when the pump outlet pressure is too high, the pressure relief device will automatically open.

[0050] Combination Figure 5-7 The pressure relief nozzle 600 extends horizontally, and the liquid outlet nozzle 500 extends vertically. The pressure relief nozzle 600 and the liquid outlet nozzle 500 are distributed as described above.

[0051] In this embodiment, the pressure relief nozzle 600 has a structure that is roughly the same as the liquid outlet nozzle 500, the pressure relief pipe 610 has a structure that is the same as the liquid outlet pipe 510, the second spring 620 has a structure that is the same as the first spring 520, and the second plug 640 has a structure that is the same as the first plug 540. The difference is that the pressure relief nozzle 600 is used to plug the liquid with a stopper 630, while the liquid outlet nozzle 500 is used to plug the liquid with a steel ball 530.

[0052] Combination Figure 2The housing 100 includes a cover 110, a sealing ring 120, a main body 130, an upper bracket 140, and a lower bracket 150. The cover 110 is located at the upper end of the main body 130, the sealing ring 120 is located on the main body 130 and acts between the cover 110 and the sealing ring 120, the upper bracket 140 is located at the lower end of the main body 130, and the lower bracket 150 is located at the lower end of the upper bracket 140.

[0053] The cover 110, main body 130, upper bracket 140, and lower bracket 150 are locked together by a number of long bolts. The pump core device 200 is located inside the main body 130, and the drive assembly 300 is located at the lower end of the lower bracket 150. The drive assembly 300 penetrates the upper bracket 140 and is driven to connect with the pump core device 200. The inlet nozzle 400 and outlet nozzle 500 are both located on the outer side of the cover 110.

[0054] Combination Figure 8 In this embodiment, to ensure a better sealing effect, a sealing ring 120 is provided between the cover 110 and the main body 130. The sealing ring 120 is elastically configured, and its outline is adapted to the cover 110 and the main body 130. The sealing ring 120 includes an outer ring 121, an inner ring 122, and a connecting strip 123 connecting the two rings. First ridges 124 with the same outline as the outer ring 121 are provided on the upper and lower surfaces, respectively. Second ridges 125 with the same outline as the inner ring 122 are provided on the upper and lower surfaces, respectively. A first valley 138 adapted to the first ridge 124 and a second ridge 125 adapted to the second ridge 125 are correspondingly provided on the main body 130. The seal is formed by the interlocking of the ridges and valleys. A positioning through hole 126 is provided on the connecting strip 123 for positioning the main body 130.

[0055] Combination Figure 2-4 The pump core device 200 includes a check valve 210, a piston 220, and several umbrella valves 230. The piston 220 is located on the main body 130 and penetrates the upper bracket 140 to be driven and connected to the drive assembly 300. The several umbrella valves 230 are all located on the main body 130 and embedded in the piston 220. The check valve 210 is located between the main body 130 and the cover 110.

[0056] Combination Figure 9 The piston 220 is made of an elastic material, such as rubber. The top of the piston 220 is hollowed out to form three grooves 221. The upper bracket 140 is provided with three mounting holes 141 for mounting the piston 220. The outer wall of the groove 221 can pass through the three mounting holes 141. The driving end of the piston 220 is in the form of three independent conical structures. The lower end of the piston 220 passes through the upper bracket 140 and extends into the bracket. The Y-shaped structure at the top of the swing frame 330 is correspondingly fitted onto the three conical structures at the driving end of the piston 220.

[0057] The main body 130 is mounted on the upper bracket 140. The main body 130 is equipped with mounting posts 137, which are inserted into the positioning through-hole 126 to position and install the sealing ring 120. A surrounding plate 131 is provided on the top of the main body 130, dividing it into an inner groove 132 and an outer groove 133. The inner groove 132 on the top surface of the main body 130 has three discharge holes 134 spaced apart, each discharge hole 134 being a curved strip. The outer groove 133 on the top surface of the main body 130 has three sets of suction holes 135 spaced apart, arranged circumferentially along the three discharge holes 134. The top edge of the piston 220 is pressed between the upper bracket 140 and the main body 130, causing the upper bracket 140 to... A sealed structure is formed between the piston 220 and the main body 130. The piston 220 is placed on the bottom end of the main body 130. The three grooves 221 and the bottom end of the main body 130 form three independent diaphragm chambers 222. Each diaphragm chamber 222 contains an umbrella valve 230. Each umbrella valve 230 is in the shape of an inverted umbrella. The upper ends of the three umbrella valves 230 are movably inserted into the mounting post 137 of the main body 130. The lower ends of the three umbrella valves 230 are movably placed on the three sets of suction holes 135, thereby controlling the three sets of suction holes 135 to open and close in one direction. The check valve 210 is placed on the discharge hole 134, and the check valve 210 controls the three discharge holes 134 to open and close in one direction.

[0058] Furthermore, a first boss 136 is provided at the axis of the main body 130, and three discharge holes 134 are arranged along the outer periphery of the first boss 136. The check valve 210 includes a second boss 211 and a blocking part 212. The second boss 211 is recessed and forms a mounting groove that matches the first boss 136. The blocking part 212 is used to block the discharge holes 134. It should be understood that during installation, the second boss 211 is fitted onto the first boss 136 and will move up and down relative to the first boss 136 when impacted. The first boss 136 here plays a positioning and guiding role to ensure the smooth movement of the check valve 210. Multiple discharge holes 134 can be provided according to different needs, and they can also be set in different shapes, without limitation.

[0059] To facilitate installation of the check valve 210, an elastic material such as rubber can be used. To prevent the check valve 210 from being damaged after repeated impacts and affecting subsequent use, a reinforcing rib 213 is provided between the second boss 211 and the shielding part 212. The reinforcing rib 213 is connected to the second boss 211 and is arranged circumferentially along the second boss 211. The reinforcing rib 213 makes the structure between the second boss 211 and the shielding part 212 stable.

[0060] In this application, three sets of suction holes 135, three umbrella valves 230, and three discharge holes 134 are provided. The number of suction holes 135 in each set is not limited and can be two, three, four, five, etc. Setting multiple suction holes 135 can accelerate the flow of liquid.

[0061] Combination Figure 7 In this embodiment, an inlet nozzle 400 and an outlet nozzle 500 are disposed on the cover 110. The inlet nozzle 400 is used to communicate with an external water source, and the outlet nozzle 500 is disposed at the center of the cover 110. The inlet nozzle 400 and the outlet nozzle 500 are spaced apart. The cover 110 covers the top surface of the main body 130 to form a discharge chamber and a suction chamber. The discharge chamber is formed by the inner groove 132 and the cover 110, and the suction chamber is formed by the outer groove 133 and the cover 110. The suction chamber is arranged in a ring around the discharge chamber. The inlet nozzle 400 communicates with the suction chamber, and the outlet nozzle 500 communicates with the discharge chamber. All three sets of suction holes 135 are located in the suction chamber. The three diaphragm chambers 222 can communicate with the suction chamber through the corresponding set of suction holes 135.

[0062] Combination Figure 10 The drive assembly 300 includes a motor 310, an eccentric wheel 320, a swing frame 330, and a drive shaft 340. The motor 310 is located at the lower end of the lower bracket 150, the eccentric wheel 320 is located at the drive end of the motor 310, and the swing frame 330 is connected to the eccentric wheel 320 via the drive shaft 340. The swing frame 330 is drivenly connected to the pump core device 200. The motor 310 is fixed to the lower end of the lower bracket 150 by bolts. The lower bracket 150 is hollow inside, and the eccentric wheel 320, the swing frame 330, and the drive shaft 340 are all located in the hollow inner cavity of the lower bracket 150.

[0063] The swing frame 330 is connected to the eccentric wheel 320 via the drive shaft 340. The swing frame 330 is inclined relative to the eccentric wheel 320. The piston 220 assembly is connected to the swing frame 330. The movement of the swing frame 330 drives the piston 220 assembly to perform piston 220 movement. When the eccentric wheel 320 rotates, the drive shaft 340 rotates simultaneously, driving the swing frame 330 to rotate. The swing frame 330 swings up and down, driving the piston 220 assembly to perform piston 220 movement, thereby realizing the water inlet or outlet action.

[0064] In this pressure relief pump, the drive assembly 300 drives the pump core assembly 200, creating a volume difference within the cavity of the housing 100. Liquid enters through the inlet nozzle 400 and exits through the outlet nozzle 500. The steel ball 530 and the first spring 520 prevent backflow of the outlet medium into the pump, and also prevent siphoning. When the outlet nozzle 500 is connected to a pipeline, the first annular buckle 511 is located away from the pipeline from the first plug 540. During backflow, liquid flows out from the inner wall between the pipes and the first plug 540, preventing overflow from the first annular buckle 511. Specifically, the backflowing liquid is discharged again from the guide ring groove 541 and guide hole 517 into the outer pipe of the outlet nozzle 500. Compared to traditional buckle rings, this design eliminates the need for additional sealing rings, preventing liquid leakage. The first annular buckle 511 is designed below the first plug 540 to form a seal with the pipeline. This reduces the need for assembling two sealing rings, simplifying the assembly process and reducing costs. The use of two sealing rings was also reduced in terms of production material costs, thus reducing the product's material costs.

[0065] The above are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A siphon-proof, backflow-preventing liquid outlet nozzle, characterized in that, It includes a liquid outlet tube (510), a first spring (520), a steel ball (530), and a first plug (540). The first plug (540) is fitted inside the liquid outlet pipe (510) and located at the outlet end of the liquid outlet pipe (510). A portion of the first plug (540) is exposed outside the liquid outlet pipe (510). The steel ball (530) is located inside the liquid outlet pipe (510) and located at the inlet end of the liquid outlet pipe (510). The first spring (520) is located inside the liquid outlet pipe (510) and between the first plug (540) and the steel ball (530). The first spring (520) acts between the liquid outlet pipe (510) and the steel ball (530). The outer wall of the liquid outlet pipe (510) is provided with a first annular buckle (511). The first annular buckle (511) is located on the side of the exposed portion of the first plug (540) near the inlet end of the liquid outlet pipe (510).

2. The antisiphon return flow nozzle according to claim 1, characterized in that The outer wall of the first plug (540) is provided with a flow guide groove (541), which is located on the first plug (540) near the end of the outlet pipe (510). The outer wall of the outlet pipe (510) is provided with a flow guide hole (517), which is located on the outlet pipe (510) near the outlet end.

3. The antisiphon return flow nozzle according to claim 2, characterized in that The first plug (540) includes an installation part (542) and a limiting part (543). The limiting part (543) is located above the installation part (542). The installation part (542) has a liquid outlet channel (544) at its axial position. The installation part (542) is sleeved inside the liquid outlet pipe (510), and the limiting part (543) is exposed outside the liquid outlet pipe (510).

4. The antisiphon return flow nozzle according to claim 3, characterized in that The outer wall of the first plug (540) is provided with a plurality of locking blocks (545), and the inner wall of the liquid outlet pipe (510) is provided with a plurality of locking grooves (512) corresponding to the plurality of locking blocks (545), and the locking grooves (512) are in the shape of "L".

5. The anti-siphon, anti-backflow outlet nozzle according to claim 1, wherein The interior of the outlet pipe (510) is configured with a first cavity (513), a second cavity (514), and a third cavity (515), which are arranged sequentially and connected from the outlet end to the inlet end. The first cavity (513) and the third cavity (515) are straight cavities, and the second cavity (514) is a conical cavity. The second cavity (514) and the third cavity (515) are connected by an inclined plane (516).

6. An anti-siphon, anti-reflux outlet nozzle according to any one of claims 1 to 5 wherein, It also includes a pressure relief nozzle (600), which is disposed on the outer wall of the liquid outlet nozzle (500) and communicates with the liquid outlet nozzle (500). The pressure relief nozzle (600) includes a pressure relief pipe (610), a second spring (620), a plug (630), and a second cap (640). The second cap (640) is fitted inside the pressure relief pipe (610) and located at the outlet end of the pressure relief pipe (610). A portion of the second cap (640) is exposed outside the pressure relief pipe (610). The plug (630) is located inside the pressure relief pipe (610) and located at the inlet end of the pressure relief pipe (610). The second spring (620) is located inside the pressure relief pipe (610) and between the second cap (640) and the plug (630). The second spring (620) acts between the pressure relief pipe (610) and the plug (630). The outer wall of the pressure relief pipe (610) is provided with a second annular buckle. The second annular buckle is located on the side of the exposed portion of the second cap (640) near the inlet end of the pressure relief pipe (610).

7. A pressure relief pump comprising an anti-siphon, non-return outlet liquid nozzle according to any one of claims 1 to 6, characterised in that, It also includes a housing (100), a pump core assembly (200), a drive assembly (300), and an inlet nozzle (400). The pump core assembly (200) is located inside the housing (100); the drive assembly (300) is located on the housing (100) and is drivenly connected to the pump core assembly (200), configured to provide driving force to the pump valve assembly; the inlet nozzle (400) and the outlet nozzle (500) are both located on the pump housing (100).

8. The pressure relief pump of claim 7, wherein, The housing (100) includes a cover (110), a sealing ring (120), a main body (130), an upper bracket (140), and a lower bracket (150). The cover (110) is located at the upper end of the main body (130), the sealing ring (120) is located on the main body (130) and acts between the cover (110) and the sealing ring (120), the upper bracket (140) is located at the lower end of the main body (130), and the lower bracket (150) is located at the lower end of the upper bracket (140). The pump core device (200) is located inside the main body (130), the drive assembly (300) is located at the lower end of the lower bracket (150), the drive assembly (300) penetrates the upper bracket (140) and is driven to connect with the pump core device (200), and the inlet nozzle (400) and outlet nozzle (500) are both located on the outer side of the cover (110).

9. The pressure relief pump of claim 8, wherein, The pump core device (200) includes a check valve (210), a piston (220), and several umbrella valves (230). The piston (220) is located on the main body (130) and penetrates the upper bracket (140) to be driven and connected to the drive assembly (300). The several umbrella valves (230) are all located on the main body (130) and embedded in the piston (220). The check valve (210) is located between the main body (130) and the cover (110).

10. The pressure relief pump of claim 8, wherein, The drive assembly (300) includes a motor (310), an eccentric wheel (320), a swing frame (330), and a transmission shaft (340). The motor (310) is located at the lower end of the lower support (150), the eccentric wheel (320) is located at the drive end of the motor (310), the swing frame (330) is connected to the eccentric wheel (320) through the transmission shaft (340), and the swing frame (330) is drivenly connected to the pump core device (200).

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