Overflow valve structure with microswitch

Abstract

The utility model relates to the technical field of overflow valves of electric cleaning machines, and discloses an overflow valve structure with a microswitch, which comprises an overflow valve body and the microswitch positioned on the side of the overflow valve body, a first cavity and a second cavity are arranged on one side of the overflow valve body close to the microswitch, and the first cavity is communicated with the second cavity. And ejector rod seats are arranged in the first cavity and the second cavity, and ejector rod heads are fixedly mounted at the ends, away from the overflow valve body, of the ejector rod seats. The overflow valve structure with the microswitch is composed of an overflow valve body formed by sequentially connecting a pressure regulating threaded sleeve, an overflow valve spring, a spring seat, an overflow valve assembly and an overflow valve lower seat, and the overflow valve structure is additionally provided with an ejector rod head, an ejector rod seat, an ejector rod spring and the microswitch. And the closing and opening of different areas and the high-low voltage state of each area are controlled, so that the closing and opening of the motor are assisted by the ejector rod to contact and disconnect the microswitch.

Description

Technical Field

[0001] This utility model relates to the field of overflow valve technology for electric cleaning machines, specifically an overflow valve structure with a micro switch. Background Technology

[0002] A high-pressure electric washer is a device that uses an electric motor to drive a water pump, generating high-pressure water flow to achieve efficient cleaning. Its core structure includes a motor, water pump, control system, and adjustable nozzle. Some models are equipped with a water tank or external water source interface. When working, the motor drives the water pump to pressurize ordinary water flow to tens or even hundreds of megapascals, which is then sprayed out through the nozzle at high speed. This can powerfully remove stubborn dirt, oil stains, mud, and other attachments from the surface of objects. This equipment is widely used in car detailing, building exterior wall cleaning, industrial equipment descaling, and courtyard floor cleaning.

[0003] Currently, some high-pressure electric cleaners on the market only have the motor and crankshaft booster pump start running when the user turns on the main switch of the cleaner, and only stop running when the main switch is turned off. In the meantime, the motor and crankshaft booster pump will continue to run, which not only results in the crankshaft booster pump being used ineffectively, but also generates a lot of useless power loss due to the motor running under no-load. To address this, we propose an overflow valve structure with a micro switch. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides an overflow valve structure with a micro switch to solve the problems mentioned in the background.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an overflow valve structure with a micro switch, comprising an overflow valve body and a micro switch located on the side of the overflow valve body. The overflow valve body has a first cavity and a second cavity on the side near the micro switch. A push rod seat is provided inside the first cavity and the second cavity. A push rod head is fixedly installed at the end of the push rod seat away from the overflow valve body. A push rod spring is provided on the outside of the push rod seat. A sealing ring is provided at the connection between the push rod seat and the second cavity. A water flow channel one is interconnected on the outside of the first cavity, and a water flow channel two is interconnected on the outside of the second cavity.

[0008] An external pressure regulating screw sleeve is provided on the top of the overflow valve body near the micro switch. An overflow valve fixing sleeve is provided inside the external pressure regulating screw sleeve. An upper spring seat, an overflow valve spring, a lower spring seat, an overflow valve assembly, and an overflow valve lower seat are distributed from top to bottom on the inner side of the overflow valve fixing sleeve. A fourth cavity is provided inside the overflow valve fixing sleeve at the end of the overflow valve assembly near the overflow valve lower seat. A water flow channel three is interconnected on the outer side of the fourth cavity.

[0009] Preferably, a water outlet connector is provided on the front side of the overflow valve body, a third cavity and a fifth cavity are provided at the connection between the overflow valve body and the water outlet connector, a check valve seat is provided at the end of the water outlet connector near the overflow valve body, and a check valve spring is provided between the check valve seat and the water outlet connector.

[0010] Through the above technical solution, the high-pressure water flows rapidly from the inlet to the outlet near the outlet joint along the normal path of the crankshaft booster pump. The check valve spring is in a retracted state due to the unidirectional high-pressure water flow. The check valve seat does not contact the overflow valve body. The water pressure in the fourth cavity, the third cavity, the first cavity, and the second cavity is exactly the same as that of the high-pressure water flow.

[0011] Preferably, the micro switch is located inside the switch rear cover, and a switch front cover is fixedly installed on the front side of the switch rear cover. The push rod head passes through the switch rear cover and extends into the interior of the switch rear cover, and the push rod head and the micro switch are located on the same horizontal line.

[0012] Preferably, the external pressure regulating screw sleeve and the overflow valve fixing sleeve are threadedly connected, the upper spring seat and the lower spring seat have the same structure, the upper spring seat and the lower spring seat are symmetrically distributed at the upper and lower ends of the overflow valve spring, and the lower spring seat is in contact with the overflow valve assembly.

[0013] Preferably, the horizontal line of the check valve seat and the water outlet connector are on the same horizontal line, and the water outlet connector and the overflow valve body are threaded together.

[0014] With the above technical solution, the push rod spring is in a pre-tightened state, the push rod is in a retracted state when in contact with the push rod spring, the push rod head and the micro switch are not in contact, and the overflow valve spring is in a pre-tightened state when the user connects to the power supply and water source and uses the machine and turns on the high water pressure spray gun.

[0015] Preferably, the fourth cavity, the third water flow channel, and the fifth cavity are interconnected, and the second cavity, the second water flow channel, and the third cavity are interconnected.

[0016] Through the above technical solution, the water pressure at this location is higher than the high-pressure water flow pressure when the machine is used. This causes the water flow in this area to enter the fourth cavity between the overflow valve assembly and the overflow valve body along the water flow channel three. Then, this part of the water flow will cause the overflow valve spring to contract through the overflow valve assembly and the spring seat, causing the overflow valve assembly and the lower seat of the overflow valve to disconnect from each other. At the same time, the water flow in the third cavity will also enter the second cavity along the water flow channel two. At this time, two regions with different pressures are formed in the overflow valve body. One region is the fourth cavity near the water outlet, and the other is the third cavity and the second cavity.

[0017] Compared with the prior art, this utility model provides an overflow valve structure with a micro switch, which has the following advantages:

[0018] The overflow valve structure with micro switch consists of an adjusting screw sleeve, an overflow valve spring, a spring seat, an overflow valve assembly, and an overflow valve lower seat connected in sequence to the overflow valve body. It also includes two additional structural parts: a push rod head, a push rod seat, a push rod spring, and a micro switch. The overflow valve spring utilizes the pressure difference changes in different areas of the overflow valve at different times to control the closure and opening of different areas and the high and low pressure states of each area. This allows the push rod to contact and disconnect the micro switch to assist in closing and opening the motor. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the micro switch mounting structure of this utility model. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the micro switch mounting structure of this utility model. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the overflow valve body of this utility model. Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the overflow valve body of this utility model. Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the installation structure of the external pressure regulating screw sleeve of this utility model;

[0025] Figure 7 Schematic diagram of the installation structure of the overflow valve assembly of this utility model Figure 1 ;

[0026] Figure 8 Schematic diagram of the installation structure of the overflow valve assembly of this utility model Figure 2 ;

[0027] Figure 9 This is a schematic diagram of the overflow valve spring mounting structure of this utility model;

[0028] Figure 10 This is a schematic cross-sectional view of the overflow valve assembly of this utility model;

[0029] Figure 11 This is a schematic diagram of the mounting structure of the top rod head of this utility model.

[0030] The components are as follows: 1. Overflow valve body; 2. Switch rear cover; 3. Switch front cover; 4. Micro switch; 5. Push rod head; 6. Push rod seat; 7. Sealing ring; 8. Push rod spring; 9. First cavity; 10. Water flow channel one; 11. Second cavity; 12. Water flow channel two; 13. Third cavity; 15. Check valve seat; 16. Check valve spring; 17. Water outlet connector; 18. Overflow valve fixing sleeve; 19. Overflow valve spring; 20. Upper spring seat; 21. External pressure adjusting screw sleeve; 22. Lower spring seat; 23. Overflow valve assembly; 24. Overflow valve lower seat; 25. Fourth cavity; 26. Water flow channel three; 27. Fifth cavity. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1:

[0033] like Figure 1-11 As shown, the present invention provides an overflow valve structure with a micro switch, including an overflow valve body 1 and a micro switch 4 located on the side of the overflow valve body 1. The overflow valve body 1 has a first cavity 9 and a second cavity 11 on the side near the micro switch 4. A push rod seat 6 is slidably arranged inside the first cavity 9 and the second cavity 11. A push rod head 5 is fixedly installed at the end of the push rod seat 6 away from the overflow valve body 1. A push rod spring 8 is arranged on the outside of the push rod seat 6. A sealing ring 7 is arranged between the push rod seat 6 and the inner wall of the second cavity 11. A water flow channel 10 is interconnected on the outside of the first cavity 9, and a water flow channel 2 12 is interconnected on the outside of the second cavity 11.

[0034] An external pressure regulating screw sleeve 21 is provided on the top of the overflow valve body 1 near the micro switch 4. An overflow valve fixing sleeve 18 is provided inside the external pressure regulating screw sleeve 21. The inner side of the overflow valve fixing sleeve 18 is provided with an upper spring seat 20, an overflow valve spring 19, a lower spring seat 22, an overflow valve assembly 23 and an overflow valve lower seat 24 from top to bottom. The end of the overflow valve assembly 23 near the overflow valve lower seat 24 is provided with a fourth cavity 25 inside the overflow valve fixing sleeve 18. A water flow channel 3 26 is interconnected on the outer side of the fourth cavity 25.

[0035] Example 2:

[0036] like Figure 2-11 As shown, this is an improvement on the previous embodiment.

[0037] Specifically, an outlet connector 17 is provided on the front side of the overflow valve body 1, and a third cavity 13 and a fifth cavity 27 are provided at the connection between the overflow valve body 1 and the outlet connector 17. A check valve seat 15 is provided at the end of the outlet connector 17 near the overflow valve body 1, and a check valve spring 16 is provided between the check valve seat 15 and the outlet connector 17.

[0038] The advantage is that the high-pressure water flows rapidly from the inlet to the outlet near the outlet connector 17 along the normal path of the crankshaft booster pump. The check valve spring 16 is in a retracted state due to the unidirectional high-pressure water flow. The check valve seat 15 does not contact the overflow valve body 1. The water pressure in the fourth cavity 25, the third cavity 13, the first cavity 9, and the second cavity 11 is exactly the same as that of the high-pressure water flow.

[0039] Specifically, the micro switch 4 is located inside the switch back cover 2. The switch back cover 2 is fixedly installed with the switch front cover 3 on the front side of the switch back cover 2. The push rod head 5 passes through the switch back cover 2 and extends into the interior of the switch back cover 2. The push rod head 5 and the micro switch 4 are located on the same horizontal line.

[0040] The advantage is that the push rod spring 8 is in a pre-tightened state, the push rod is in a retracted state when it contacts the push rod spring 8, the push rod head 5 and the micro switch 4 are not in contact, and the overflow valve spring 19 is in a pre-tightened state when the user connects the power supply and water source and uses the machine and turns on the high water pressure spray gun.

[0041] Specifically, the external pressure regulating screw sleeve 21 is threadedly connected to the overflow valve fixing sleeve 18. The upper spring seat 20 and the lower spring seat 22 have the same structure. The upper spring seat 20 and the lower spring seat 22 are symmetrically distributed at the upper and lower ends of the overflow valve spring 19. The lower spring seat 22 is in contact with the overflow valve assembly 23. The horizontal lines of the check valve seat 15 and the water outlet connector 17 are on the same horizontal line. The water outlet connector 17 is threadedly connected to the overflow valve body 1. The fourth cavity 25, the third water flow channel 26 and the fifth cavity 27 are interconnected. The second cavity 11, the second water flow channel 12 and the third cavity 13 are interconnected.

[0042] The advantage is that the water pressure at this location is higher than the high-pressure water flow when the machine is in use. This causes the water flow in this area to enter the fourth cavity 25 between the overflow valve assembly 23 and the overflow valve body 1 along the water flow channel 26. Then, this part of the water flow will cause the overflow valve spring 19 to contract through the overflow valve assembly 23 and the spring seat, thereby breaking the contact between the overflow valve assembly 23 and the overflow valve lower seat 24. At the same time, the water flow in the third cavity 13 will also enter the second cavity 11 along the water flow channel 2 12. At this time, two regions with different pressures are formed in the overflow valve body 1. One region is the fourth cavity 25 near the water outlet 17, and the other is the third cavity 13 and the second cavity 11.

[0043] Working principle: When the machine is not in use, the push rod spring 8 is in a pre-tightened state, the push rod is in contact with the push rod spring 8 and is in a retracted state, and the push rod head 5 and the micro switch 4 are not in contact. When the user connects the power supply and water source and uses the machine and turns on the high-pressure spray gun, the overflow valve spring 19 is in a pre-tightened state, and the high-pressure water flows rapidly from the inlet to the outlet located near the outlet connector 17 according to the normal path of the crankshaft booster pump. The check valve spring 16 is in a retracted state under the action of the unidirectional high-pressure water flow, and the check valve seat 15 is not in contact with the overflow valve body 1. The fourth cavity 25 and the third cavity... 13. In the first cavity 9 and the second cavity 11, the water pressure and high-pressure water flow are exactly the same. The push rod is in its natural, original state, and the push rod head 5 and the micro switch 4 are not in contact. When the user closes the high-pressure spray gun using the machine, no high-pressure water flow passes through the check valve seat 15. The check valve seat 15 and the overflow valve body 1 are in complete contact and a closed ultra-high water pressure area is generated in the third cavity 13. The water pressure in this area is higher than the high-pressure water flow pressure when the machine is used. This causes the water flow in this area to enter the space between the overflow valve assembly 23 and the overflow valve body 1 along the water flow channel 26. The fourth cavity 25 receives water, which then flows through the overflow valve assembly 23 and the spring seat to compress the overflow valve spring 19, causing the overflow valve assembly 23 and the lower seat 24 to disconnect. Simultaneously, water from the third cavity 13 flows along the water flow channel 22 into the second cavity 11. At this point, two pressure zones are formed within the overflow valve body 1. One zone is the fourth cavity 25 near the outlet connector 17, encompassing the third cavity 13 and the second cavity 11, where the pressure is higher. The other zone, located within the booster pump, has lower pressure. The two zones are connected by… Separated by the check valve seat 15, in the other area with lower pressure, the water flows through the water flow channel 10 to the first cavity 9 where the push rod spring 8 is located. At this time, since the water pressure in the second cavity 11 is higher than that in the first cavity 9, and the contact area between the water in the second cavity 11 and the end of the push rod is larger than that between the first cavity 9 and the end of the push rod, the push rod spring 8 will be retracted under pressure. The push rod will be pushed out towards the micro switch 4 and finally contact the micro switch 4. Then, the micro switch 4 will assist in shutting down the motor, thereby pausing the operation of the motor and the crankshaft booster pump.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A relief valve structure with a micro switch, comprising a relief valve body (1) and a micro switch (4) located on the side of the relief valve body (1), characterized in that: The overflow valve body (1) has a first cavity (9) and a second cavity (11) on the side near the micro switch (4). The first cavity (9) and the second cavity (11) are interconnected. A push rod seat (6) is slidably arranged inside the first cavity (9) and the second cavity (11). A push rod head (5) is fixedly installed at the end of the push rod seat (6) away from the overflow valve body (1). A push rod spring (8) is arranged on the outside of the push rod seat (6). A sealing ring (7) is arranged between the push rod seat (6) and the inner wall of the second cavity (11). A water flow channel one (10) is interconnected on the outside of the first cavity (9), and a water flow channel two (12) is interconnected on the outside of the second cavity (11). An external pressure regulating screw sleeve (21) is provided on the top of the overflow valve body (1) near the micro switch (4). An overflow valve fixing sleeve (18) is provided inside the external pressure regulating screw sleeve (21). The inner side of the overflow valve fixing sleeve (18) is provided with an upper spring seat (20), an overflow valve spring (19), a lower spring seat (22), an overflow valve assembly (23), and an overflow valve lower seat (24) in sequence from top to bottom. The overflow valve assembly (23) near the overflow valve lower seat (24) is provided with a fourth cavity (25) inside the overflow valve fixing sleeve (18). The outer side of the fourth cavity (25) is interconnected with a water flow channel three (26).

2. The overflow valve structure with micro switch according to claim 1, characterized in that: The overflow valve body (1) is provided with a water outlet connector (17) on the front side. The connection between the overflow valve body (1) and the water outlet connector (17) is provided with a third cavity (13) and a fifth cavity (27). A check valve seat (15) is provided at one end of the water outlet connector (17) near the overflow valve body (1). A check valve spring (16) is provided between the check valve seat (15) and the water outlet connector (17).

3. The overflow valve structure with micro switch according to claim 1, characterized in that: The micro switch (4) is located inside the switch back cover (2). A switch front cover (3) is fixedly installed on the front side of the switch back cover (2). The push rod head (5) passes through the switch back cover (2) and extends into the interior of the switch back cover (2). The push rod head (5) extends into the trigger range of the micro switch (4). The push rod head (5) and the micro switch (4) are located on the same horizontal line.

4. The overflow valve structure with micro switch according to claim 1, characterized in that: The external pressure regulating screw sleeve (21) is threadedly connected to the overflow valve fixing sleeve (18). The upper spring seat (20) and the lower spring seat (22) have the same structure. The upper spring seat (20) and the lower spring seat (22) are symmetrically distributed at the upper and lower ends of the overflow valve spring (19). The lower spring seat (22) is in contact with the overflow valve assembly (23).

5. The overflow valve structure with micro switch according to claim 2, characterized in that: The horizontal lines of the check valve seat (15) and the outlet connector (17) are on the same horizontal line, and the outlet connector (17) and the overflow valve body (1) are threaded together.

6. The overflow valve structure with micro switch according to claim 1, characterized in that: The fourth cavity (25), the third water flow channel (26) and the fifth cavity (27) are interconnected, and the second cavity (11), the second water flow channel (12) and the third cavity (13) are interconnected.

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