Automobile washing pump check flow structure

Abstract

The utility model provides a kind of automobile washing pump check flow device, belong to the technical field of automobile parts, it solves the problem of incomplete check flow, lack of limiting structure.The utility model includes end cover, pump base, motor, water outlet and water inlet, the pump base terminal is equipped with base, the base outside derives cavity, its inside is equipped with water outlet passage, water outlet is installed on the water outlet passage, limiting structure is arranged between the water outlet and water outlet passage, the limiting structure includes limit cap, limiting block and valve ball seat, limiting block lower side is equipped with water inlet.The utility model has the advantages that: the check flow structure is realized one-way flow, reverse blocking function by simple sphere, utilize gravity and liquid flow pressure difference control valve ball action, without spring and other complex parts, simple structure, high reliability, limiting device protects sphere not to drop into pump cavity, also prevent springing jam;Since ball valve is installed in pump body interior, without external joint, effectively reduce leakage point;Flexible ring or buffer pad is set in limit cap interior, absorb sphere impact noise and kinetic energy, reduce fatigue wear under high frequency use.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and relates to a car wash pump, and particularly to a backflow prevention structure for a car wash pump. Background Technology

[0002] Existing car washer pumps are mainly used to spray washer fluid onto parts such as the windshield and headlights to ensure clear driving visibility and vehicle safety. In traditional designs, check valves are often used to control the unidirectional flow of the liquid and prevent it from flowing back into the reservoir after the pump stops working.

[0003] Existing technologies have incorporated ball valve structures as check valves. The principle is that liquid pressure pushes the valve ball open, causing it to rise as liquid flows through. When the liquid supply stops, the ball closes the outlet due to gravity or back pressure, preventing backflow. Although this type of ball valve structure has a certain check valve effect in principle, it lacks an effective limiting structure in practical applications. The ball may shift, get stuck, or even fall off and fail under liquid flow impact or vehicle vibration. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems in the existing technology by providing a backflow prevention structure for a car wash pump, effectively solving the problems of incomplete backflow prevention, liquid leakage, and lack of limiting structure. To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] This utility model discloses a backflow prevention structure for a car wash pump, including an end cover, a pump base, a motor, a water inlet, and a water outlet. The pump base is fitted with an end cover, and the water inlet is located at the end of the pump base. A base is installed at the lower end of the pump base, and a water outlet channel is provided on the inner side of a cavity extending from the outer side of the base. A water outlet is provided on the water outlet channel, and a limiting structure is provided between the water outlet channel and the water outlet. The limiting structure includes a limiting block that restricts the backward movement of a valve ball, a limiting cover that allows water to flow through, and a valve ball seat. An inclined surface is formed at the lower end between the water outlet and the limiting cover. An approximately elliptical water inlet is formed on the limiting block, allowing liquid to flow out from the lower end and push the valve ball upward. To prevent the valve ball from inertia generated during vehicle movement, two symmetrical limiting posts are provided between the limiting cover and the valve ball.

[0006] In the aforementioned car wash pump backflow prevention structure, a valve ball is installed on the valve ball seat.

[0007] In the aforementioned car wash pump backflow prevention structure, the limiting cover is provided with multiple water passage holes, allowing liquid to pass through but preventing the ball from exceeding the active area.

[0008] In the aforementioned car wash pump backflow prevention structure, the limiting cover is equipped with multiple rubber rings installed between each adjacent water passage hole to reduce the impact of the valve ball repeatedly falling back onto the valve seat and extend its service life.

[0009] In the aforementioned car wash pump backflow prevention structure, the valve ball seat is configured with a hemispherical groove to fit the valve ball.

[0010] In the aforementioned car wash pump backflow prevention structure, the valve ball seat is connected to the limiting cover and has a certain slope so that the valve ball can return to the valve ball seat after the water pressure impact ends.

[0011] Compared with existing technologies, the car wash pump provided by this utility model has the following advantages: the lower end between the outlet and the limiting cover is set as an inclined surface, which facilitates the restriction of a small amount of liquid backflow. This anti-backflow structure relies on a simple ball to achieve the function of unidirectional flow and reverse blocking. It uses gravity and liquid pressure difference to control the movement of the valve ball, eliminating the need for complex components such as springs. The structure is simple and highly reliable. The limiting device not only protects the ball from falling into the pump chamber, but also prevents bouncing and jamming. Since the ball valve is installed inside the pump body, no external joint is required, effectively reducing leakage points. A flexible ring or buffer pad is set inside the limiting cover to absorb the impact noise and kinetic energy of the ball, reducing fatigue wear under high-frequency use. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the present invention;

[0013] Figure 2 This is a cross-sectional view of the base of this utility model;

[0014] Figure 3 This is a cross-sectional view of the limiting cover of this utility model;

[0015] Figure 4 yes Figure 2 Enlarged view of center circle A;

[0016] The components are as follows: 1. End cover; 2. Pump base; 3. Motor; 31. Motor shaft; 4. Shaft seal; 5. Inlet; 6. Outlet; 7. Impeller; 8. Base; 9. Outlet channel; 10. Limit block; 11. Water inlet; 12. Valve ball seat; 13. Limit cover; 131. Water passage hole; 14. Rubber ring; 15. Valve ball; 16. Limit post. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical solution of the present invention will be further described, but the described embodiments are only some embodiments of the present invention.

[0018] In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] like Figure 1 and Figure 2 As shown, an end cover 1 is installed on the pump base 2, and a motor 3 is installed inside. The motor shaft 31 on the motor 3 passes through the shaft seal 4 and is connected to the impeller 7. The pump base 2 has a water inlet 5 at the end. The bottom of the pump base 2 is connected to the base 8 by threads. A water outlet channel 9 is provided on the outside of the base 8. Correspondingly, the water outlet 6 is provided on the outside of the base 8 and connected to the water outlet channel 9. A limiting structure is provided between the water outlet 6 and the water outlet channel 9. The limiting structure includes a limiting cover 13, a limiting block 10, and a valve ball seat 12. An inclined surface is provided between the water outlet 6 and the limiting cover 13.

[0020] like Figure 2 As shown, the valve ball seat 12 is designed to fit the hemispherical groove of the valve ball 15. Its function is to restrict the valve ball 15 made of silicone material. In order to block the backflow liquid, a water inlet 11 is provided on the lower side of the limiting block 10. Its shape is elliptical and fits the outer surface of the valve ball 15. The end of the limiting block 10 that fits the valve ball 15 is set in an arc shape.

[0021] Furthermore, the surface connecting the valve ball seat 12, which is used to limit the displacement of the valve ball 15, and the limiting cover 13 is set as an inclined surface, so that the valve ball 15 can return to the valve ball seat 12 when it is no longer in use.

[0022] like Figure 3 As shown, the limiting cover 13 includes a rubber ring 14 and a water passage hole. The rubber ring 14 is installed around the water passage hole 131. A rubber ring 14 is provided in the middle of each adjacent water passage hole 131 to reduce the wear of the valve ball 15 caused by the pressure and thrust of the water flow and its collision with the limiting cover 13. It also absorbs the impact noise and kinetic energy of the ball. In order to prevent the valve ball 15 from shifting due to the inertia of the car during driving, limiting posts 16 are provided on both sides of the limiting cover 13. There is a gap between the limiting post 16 and the valve ball 15. During operation, it will not restrict its displacement and prevent the valve ball 15 from deviating from its position due to inertia during the car's driving.

[0023] like Figure 4As shown, the limiting block 10 is located at the end of the valve ball 15, in the middle of the entire water outlet channel 9. The limiting block 10 and the water inlet 11 are in an upper and lower relationship. The limiting block 10 is set at the upper part, while the water inlet 11 is set at the lower part. The water inlet 11 is equivalent to making an elliptical opening in the limiting block 10, so that water can flow in from the lower part to push the valve ball 15 to move. The limiting block 10 restricts the valve ball 15 from moving backward when it moves upward.

[0024] The working principle of this utility model is as follows: When the car wash pump motor 3 is turned on, the impeller 7 draws liquid from the inlet 5 and pushes it to the outlet channel 9. The liquid pressure through the outlet 11 pushes the valve ball 15 forward and upward, leaving the valve ball seat 12 and opening the channel. The cleaning liquid flows smoothly through the check flow structure to the outlet 6. After the pump motor 3 stops, there is no internal pressure, and the liquid flow is no longer continuous. The valve ball 15 automatically falls back to the ball valve seat by its own weight or the reverse liquid backflow pressure difference, and fits against the outlet 11 to form a check flow effect. The limiting posts set on both sides of the limiting cover can limit the valve ball on the valve ball seat. When the vehicle is climbing a slope or vibrating, the liquid will not flow back into the pump chamber.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A non-return flow structure of a car washing pump, comprising an end cover (1), a pump base (2), a motor (3), a water inlet (5) and a water outlet (6), characterized in that: An end cap (1) is installed on the pump base (2). An inlet (5) is provided at the end of the pump base (2). A base (8) is installed at the lower end of the pump base (2). An outlet channel (9) is provided on the inner side of the cavity extending from the outer side of the base (8). An outlet (6) is provided on the outlet channel (9). A limiting structure is provided between the outlet channel (9) and the outlet (6). The limiting structure includes a limiting block (10) that restricts the valve ball (15) from moving backward and a limiting block (10) that can... The limiting cover (13) and valve ball seat (12) are designed with a slope at the lower end between the outlet (6) and the limiting cover (13). An approximately elliptical water inlet (11) is provided on the limiting block (10) so that liquid can flow out from the lower end and push the valve ball (15) upward. In order to prevent the valve ball (15) from the inertia generated when the car is moving, two symmetrical limiting posts (16) are provided between the limiting cover (13) and the valve ball (15).

2. The automotive wash pump check flow structure according to claim 1, characterized by: A valve ball (15) is installed on the valve ball seat (12).

3. The automotive wash pump check flow structure according to claim 1, characterized by: The limiting cover (13) is provided with multiple water passage holes (131) to allow liquid to pass through, but prevent the ball from going beyond the activity area.

4. The automotive wash pump non-return flow structure according to claim 1, characterized by: Multiple rubber rings (14) are installed on the limiting cover (13) between each adjacent water passage (131) to reduce the impact of the valve ball (15) falling back repeatedly on the valve seat and extend its service life.

5. The automotive wash pump non-return flow structure according to claim 1, characterized by: The valve ball seat (12) is provided with a hemispherical groove to fit the valve ball (15).

6. The automotive wash pump check flow structure of claim 1, wherein: The valve ball seat (12) is connected to the limiting cover (13) and has a certain inclination so that the valve ball (15) can return to the valve ball seat (12) after the water pressure impact ends.

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