Bottom valve with limiting assembly

Abstract

The utility model belongs to the technical field of bottom valves, and particularly relates to a bottom valve with a limiting assembly, which comprises a valve body, the bottom end of the valve body is fixedly connected with a protective net cover, the inner wall of the valve body is fixedly connected with a mounting plate, and the bottom end of the mounting plate is fixedly connected with a limiting column fixedly connected with the inner wall of the protective net cover. The outer wall of the limiting column is sleeved with a valve plate, a sealing gasket is installed on the outer wall of the valve plate, a valve seat fixedly connected with the inner wall of the valve body is attached to the outer wall of the sealing gasket, a screw penetrates through the inner wall of the limiting column, and a rotary knob is fixedly connected to the bottom end of the screw. The rotary knob rotates to drive the adjusting sliding block to vertically slide through the screw rod, the adjusting sliding block slides to drive the movable limiting seat to vertically slide along the outer wall of the limiting column through the connecting rod, then limiting operation is conducted on the valve plate, and the situation that the pressure of the sealing gasket is too large, consequently, the sealing gasket deforms, and the sealing performance of the sealing gasket is affected is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of bottom valve technology, and in particular relates to a bottom valve with a limit component. Background Technology

[0002] A foot valve is a special type of check valve, mainly used in the suction pipeline of a water pump. It prevents liquid backflow through its unidirectional flow design, ensuring efficient pump startup and maintaining the liquid filling state of the pipeline.

[0003] For example, patent CN214788023U discloses a water pump inlet pipe bottom valve, including a bottom valve housing with a filter end and an inlet pipe connection end at both ends, and a valve core assembly inside the bottom valve housing. This utility model provides a water pump inlet pipe bottom valve that connects to the water pump inlet pipe via threads and is sealed to the bottom valve pressure-bearing end housing via a sealing gasket. Internal limiting grooves and positioning springs prevent the valve core assembly from shifting. The bottom valve filter end housing is connected to the bottom valve pressure-bearing end housing via external threads and an assembly sealing ring, ensuring a tight seal after the two housings are connected.

[0004] In existing foot valves, the valve plate seals the valve seat by its own weight, causing the sealing gasket to move. Excessive pressure on the sealing gasket can deform it, affecting its sealing performance. Therefore, we propose a foot valve with a limit component. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a bottom valve with a limit component, thereby avoiding excessive pressure on the sealing gasket.

[0006] In view of this, the present invention provides a bottom valve with a limiting component, comprising a valve body, a protective mesh cover fixedly connected to the bottom end of the valve body, an mounting plate fixedly connected to the inner wall of the valve body, a limiting post fixedly connected to the bottom end of the mounting plate and fixedly connected to the inner wall of the protective mesh cover, a valve plate sleeved on the outer wall of the limiting post, a sealing gasket installed on the outer wall of the valve plate, a valve seat fixedly connected to the inner wall of the valve body and fitted to the outer wall of the sealing gasket, a screw penetrating the inner wall of the limiting post, a knob fixedly connected to the bottom end of the screw, an adjusting slider threadedly connected to the outer wall of the screw, a connecting rod fixedly connected to the outer wall of the adjusting slider, a movable limiting seat fixedly connected to one end of the connecting rod, and a fixed limiting seat fixedly connected to the top end of the limiting post.

[0007] Based on the above structure, the rotation of the knob drives the adjusting slider to slide vertically through the screw. The sliding of the adjusting slider drives the movable limit seat to slide vertically along the outer wall of the limit post through the connecting rod, thereby limiting the valve plate and preventing excessive pressure on the sealing gasket, which could cause the sealing gasket to deform and affect its sealing performance.

[0008] Preferably, the central axis of the limiting post coincides with the central axis of the valve body. In this embodiment, this helps to improve the stability of the valve plate and avoid collisions.

[0009] Preferably, the outer wall of the protective mesh cover is provided with grid strips. In this embodiment, it realizes the protective operation of the valve body and avoids blockage inside the valve body.

[0010] Preferably, the bottom end of the valve plate is shaped like an inverted frustum, and the cross-section of the valve seat is trapezoidal. In this embodiment, the connection between the valve plate and the valve seat is inclined, which increases the contact area of ​​the sealing gasket and improves the sealing performance of the sealing gasket.

[0011] Preferably, the connecting rod is cross-shaped. In this embodiment, the adjusting slider slides through the connecting rod, causing the movable limiting seat to slide vertically along the outer wall of the limiting column. By setting the cross-shaped connecting rod, the stability of the movable limiting seat sliding is improved.

[0012] Preferably, the movable limiting seat forms a lifting structure with the limiting column through the adjusting slider and the connecting rod. In this embodiment, the adjusting slider slides through the connecting rod to drive the movable limiting seat to slide vertically along the outer wall of the limiting column, thereby limiting the valve plate and avoiding excessive pressure on the sealing gasket, which could cause the sealing gasket to deform and affect its sealing performance.

[0013] Preferably, the movable limiting seat and the fixed limiting seat are parallel. In this embodiment, the valve plate can fit against the movable limiting seat by its own weight to achieve the closing operation of the valve body. Then, the water pump works and generates negative pressure in the water suction pipe, which drives the valve plate to fit against the bottom end of the fixed limiting seat, so that water flows through the valve plate to achieve the suction operation of the water flow.

[0014] The beneficial effects of this utility model are:

[0015] 1. This bottom valve with a limit component has a movable limit seat. When the knob is turned, the screw drives the adjusting slider to slide vertically. The sliding of the adjusting slider drives the movable limit seat to slide vertically along the outer wall of the limit post through the connecting rod, thereby limiting the valve plate and preventing excessive pressure on the sealing gasket, which could cause the sealing gasket to deform and affect its sealing performance.

[0016] 2. The bottom valve with limit components, by setting a sealing gasket, the valve plate drives the sealing gasket to fit against the outer wall of the valve seat by its own weight, thereby achieving the closing operation of the valve body. Then, the water pump works, generating negative pressure in the water suction pipe, which drives the valve plate to fit against the bottom end of the fixed limit seat, so that water flows through the valve plate, thereby achieving the suction operation of the water flow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 This is a cross-sectional three-dimensional unfolded structural diagram of the valve plate and valve seat of this utility model;

[0020] Figure 4 This is a cross-sectional view of the limiting column of this utility model.

[0021] The markings in the diagram are as follows:

[0022] 1. Valve body; 2. Protective mesh cover; 3. Mounting plate; 4. Limiting post; 5. Valve plate; 6. Sealing gasket; 7. Valve seat; 8. Screw; 9. Knob; 10. Adjusting slider; 11. Connecting rod; 12. Movable limiting seat; 13. Fixed limiting seat. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Figure 4 This application will be described in further detail.

[0024] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0025] This application discloses a bottom valve with a limiting component, including a valve body 1, a protective mesh cover 2 fixedly connected to the bottom end of the valve body 1, an mounting plate 3 fixedly connected to the inner wall of the valve body 1, a limiting post 4 fixedly connected to the bottom end of the mounting plate 3 and fixedly connected to the inner wall of the protective mesh cover 2, a valve plate 5 sleeved on the outer wall of the limiting post 4, a sealing gasket 6 installed on the outer wall of the valve plate 5, a valve seat 7 fixedly connected to the inner wall of the valve body 1 fitting the outer wall of the sealing gasket 6, a screw 8 penetrating the inner wall of the limiting post 4, a knob 9 fixedly connected to the bottom end of the screw 8, an adjusting slider 10 threadedly connected to the outer wall of the screw 8, a connecting rod 11 fixedly connected to the outer wall of the adjusting slider 10, a movable limiting seat 12 fixedly connected to one end of the connecting rod 11, and a fixed limiting seat 13 fixedly connected to the top end of the limiting post 4.

[0026] Based on the above structure, the rotation of knob 9 drives the adjusting slider 10 to slide vertically through screw 8. The sliding of adjusting slider 10 drives the movable limit seat 12 to slide vertically along the outer wall of limit post 4 through connecting rod 11, thereby limiting the valve plate 5 and preventing excessive pressure on sealing gasket 6, which would cause deformation of sealing gasket 6 and affect the sealing performance of sealing gasket 6.

[0027] In one embodiment, the central axis of the limiting post 4 coincides with the central axis of the valve body 1.

[0028] In this embodiment, it is beneficial to improve the stability of valve plate 5 and avoid collisions.

[0029] In one embodiment, the outer wall of the protective mesh cover 2 is provided with grating.

[0030] In this embodiment, a protective operation is implemented for the valve body 1 to prevent blockage inside the valve body 1.

[0031] In one embodiment, the bottom end of the valve plate 5 is shaped like an inverted frustum, and the cross-section of the valve seat 7 is trapezoidal.

[0032] In this embodiment, the connection between the valve plate 5 and the valve seat 7 is inclined, which increases the contact area of ​​the sealing gasket 6 and improves the sealing performance of the sealing gasket 6.

[0033] In one embodiment, the connecting rod 11 is cross-shaped.

[0034] In this embodiment, the adjusting slider 10 slides through the connecting rod 11 to drive the movable limiting seat 12 to slide vertically along the outer wall of the limiting post 4. By setting the cross-shaped connecting rod 11, it is beneficial to improve the stability of the sliding of the movable limiting seat 12.

[0035] In one embodiment, the movable limiting seat 12 forms a lifting structure with the limiting post 4 by adjusting the slider 10 and the connecting rod 11.

[0036] In this embodiment, the adjusting slider 10 slides through the connecting rod 11 to drive the movable limiting seat 12 to slide vertically along the outer wall of the limiting post 4, thereby limiting the valve plate 5 and preventing excessive pressure on the sealing gasket 6, which would cause the sealing gasket 6 to deform and affect its sealing performance.

[0037] In one embodiment, the movable limiting seat 12 and the fixed limiting seat 13 are parallel.

[0038] In this embodiment, the valve plate 5 is made easy to fit with the movable limiting seat 12 by its own weight, so as to realize the closing operation of the valve body 1. Then, the water pump works and generates negative pressure in the water suction pipe, which drives the valve plate 5 to fit with the bottom end of the fixed limiting seat 13, so that the water flows through the valve plate 5 and realizes the water suction operation.

[0039] In this embodiment, when the bottom valve with the limit component is in use, the operator first rotates the knob 9. The rotation of the knob 9 drives the adjusting slider 10 to slide vertically through the screw 8. The sliding of the adjusting slider 10 drives the movable limit seat 12 to slide vertically along the outer wall of the limit post 4 through the connecting rod 11, thereby limiting the valve plate 5 and preventing the sealing gasket 6 from being under excessive pressure, which would cause the sealing gasket 6 to deform and affect its sealing performance.

[0040] Next, the bottom valve is installed at the bottom of the water pump suction pipe. The valve plate 5 drives the sealing gasket 6 to fit against the outer wall of the valve seat 7 by its own weight, thereby achieving the closing operation of the valve body 1.

[0041] Finally, the water pump operates, generating negative pressure in the suction pipe, which causes the valve plate 5 to come into contact with the bottom end of the fixed limit seat 13, allowing water to flow through the valve plate 5 and achieving the water suction operation.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bottom valve with a limiting assembly, characterized in that, The device includes a valve body (1), a protective mesh cover (2) fixedly connected to the bottom end of the valve body (1), an installation plate (3) fixedly connected to the inner wall of the valve body (1), a limiting post (4) fixedly connected to the bottom end of the installation plate (3) and fixedly connected to the inner wall of the protective mesh cover (2), a valve plate (5) sleeved on the outer wall of the limiting post (4), a sealing gasket (6) installed on the outer wall of the valve plate (5), a valve seat (7) fixedly connected to the inner wall of the valve body (1) fitting the outer wall of the sealing gasket (6), a screw (8) penetrating the inner wall of the limiting post (4), a knob (9) fixedly connected to the bottom end of the screw (8), an adjusting slider (10) threadedly connected to the outer wall of the screw (8), a connecting rod (11) fixedly connected to the outer wall of the adjusting slider (10), a movable limiting seat (12) fixedly connected to one end of the connecting rod (11), and a fixed limiting seat (13) fixedly connected to the top end of the limiting post (4).

2. The bottom valve with a limiting assembly according to claim 1, characterized in that: The central axis of the limiting post (4) coincides with the central axis of the valve body (1).

3. The bottom valve with a limiting assembly according to claim 1, characterized in that: The outer wall of the protective mesh cover (2) is provided with grating.

4. The bottom valve with a limiting assembly according to claim 1, characterized in that: The bottom end of the valve plate (5) is shaped like an inverted frustum, and the cross-section of the valve seat (7) is trapezoidal.

5. The bottom valve with a limiting assembly according to claim 1, characterized in that: The connecting rod (11) is cross-shaped.

6. The bottom valve with a limiting assembly according to claim 1, characterized in that: The movable limiting seat (12) forms a lifting structure with the limiting column (4) by adjusting the slider (10) and connecting rod (11).

7. The bottom valve with a limiting assembly according to claim 1, characterized in that: The movable limiting seat (12) and the fixed limiting seat (13) are parallel.

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