Limiting structure and check valve
By designing the limit structure and buffer components in the check valve, the problems of valve core damage and sealing surface damage caused by excessive liquid pressure are solved, and the effect of preventing collisions and abrasions is achieved, ensuring the stability of sealing performance.
Patent Information
- Application Number
- CN202421729993.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-22
AI Technical Summary
When existing check valves face excessive liquid pressure, they can easily cause the valve core to deform or damage, and the sealing surface may be damaged, resulting in leakage.
A limiting structure is designed, including a limiting assembly and a buffering assembly. The limiting assembly prevents damage caused by limiting the movement of the valve disc and the valve seat by limiting the direction of the valve disc and causing damage; the buffering assembly slows down the speed of the valve disc when moving to the valve seat to avoid collisions and abrasions caused by too fast speed.
It effectively prevents collision and abrasion between the valve disc and the valve seat, avoids deformation or damage of the valve core, ensures stability of sealing performance, and avoids leakage.
Smart Images
Figure CN222910869U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of check valves, and particularly relates to a limiting structure and a check valve. Background Art
[0002] A check valve refers to a valve whose closing member is a circular valve flap and which blocks the reverse flow of the medium by its own weight and the action of the medium pressure. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. A one-way valve is a valve that allows liquid to flow in only one direction and inhibits the flow in the opposite direction. Such a one-way valve is provided in a hydraulic circuit or a pipe of a refrigeration cycle system to prevent the reverse flow of liquid.
[0003] When the one-way valve is closed, if the liquid pressure at the other end is too high, this pressure will directly act on the valve core. If the pressure exceeds the bearing capacity of components such as the valve core and the spring, it will cause the valve core to deform or be damaged. The excessive liquid pressure may also damage the sealing surface between the valve core and the valve seat, resulting in a decrease in the sealing performance and leakage. Summary of the Utility Model
[0004] The purpose of the utility model is to propose a limiting structure and a check valve for the problems existing in the background art.
[0005] The technical solution of the utility model: A limiting structure includes a valve body, inside which a fixed block is connected, and one end of a first elastic member is connected to the fixed block; a valve flap, one end of which is connected to the first elastic member; a valve seat, which is connected to the valve body, and the valve seat is slidably connected to the valve flap; a limiting component, which is connected to the valve seat; in the use state of the limiting component, the limiting component restricts the position of the valve flap moving towards the valve seat; a buffer component, which is connected to the valve body; in the use state of the buffer component, the buffer component slows down the speed of the valve flap moving towards the valve seat.
[0006] Preferably, an installation groove is formed on the outer peripheral wall of the valve flap, and a sealing ring is connected in the installation groove.
[0007] Preferably, the limiting component includes a plurality of second elastic members evenly distributed in a circumferential direction, the second elastic members are connected in a receiving groove formed on the valve seat; a stop block, the number of which corresponds to that of the second elastic members, the stop block is slidably connected in the receiving groove, and one end of the stop block is connected to the second elastic member; a clamping block, which is connected to the valve flap, and the clamping block is slidably connected to a step formed on the valve seat.
[0008] Preferably, a plurality of fixing rods distributed in a circumferential direction are connected to the fixed block, and the fixing rods are slidably connected to through holes formed on the clamping block.
[0009] Preferably, the buffer assembly includes a buffer rod connected to the valve flap, with uniformly distributed limiting teeth connected to the outer peripheral wall of the buffer rod; a fixed shaft, with two fixed shafts symmetrically arranged, and both ends of the fixed shaft are connected to the valve body; a limiting plate, the number of which corresponds to that of the fixed shafts, and the limiting plate is rotatably connected to the fixed shaft; and two third elastic members symmetrically arranged, with both ends of the third elastic members connected to the two limiting plates.
[0010] Preferably, both of the two limiting plates are inclined, the limiting plates are symmetrically arranged, and the distance between the limiting plates decreases sequentially from top to bottom.
[0011] A check valve includes the above-mentioned limiting structure.
[0012] Compared with the prior art, the above technical solution of the present utility model has the following beneficial technical effects:
[0013] In the present utility model, the limiting assembly restricts the opposite movement of the valve flap and the valve seat, the limiting assembly limits the position of the valve flap, preventing damage and deformation of the surfaces of the valve flap and the valve seat caused by the continuous movement of the valve flap. In the use state of the buffer assembly, the buffer assembly slows down the speed of the valve flap moving towards the valve seat. The buffer assembly avoids the valve flap moving too fast when moving towards the valve seat by continuously clamping and releasing, preventing deformation and abrasion caused by the mutual collision of the valve flap and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a three-dimensional schematic diagram of the internal structure of the valve body of the present utility model;
[0015] Figure 2 is Figure 1 a cross-sectional schematic diagram of
[0016] Figure 3 is Figure 2 an enlarged view of the structure at A of
[0017] Figure 4 is Figure 2 an enlarged view of the structure at B of
[0018] Reference numerals: 1, valve body; 2, fixed block; 3, first elastic member; 4, valve flap; 5, valve seat; 6, installation groove; 7, sealing ring; 8, second elastic member; 9, accommodation groove; 10, stop block; 11, clamping block; 12, fixed rod; 13, buffer rod; 14, limiting tooth; 15, fixed shaft; 16, limiting plate; 17, third elastic member. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Embodiment 1
[0020] As Figures 1-4As shown in the figure, a limiting structure proposed by the present utility model includes a valve body 1, a fixing block 2, a first elastic member 3, a valve flap 4, a valve seat 5, a limiting component, and a buffer component. A through cavity for a liquid through-hole is provided on the valve body 1. The fixing block 2 is connected to the through cavity. A through-hole for the liquid through-hole is provided on the fixing block 2. The valve seat 5 is connected to one end of the accommodating cavity away from the fixing block 2. A conical groove is provided on one side of the valve seat 5 close to the fixing block 2. The valve flap 4 is slidably connected within the valve seat 5. The shape of the valve flap 4 fits the conical groove. Both ends of the first elastic member 3 are connected between the valve flap 4 and the fixing block 2. The first elastic member 3 is selected but not limited to a spring. The limiting component is connected to the valve seat 5. In the use state of the limiting component, the limiting component restricts the valve flap 4 and the valve seat 5 from moving towards each other, limits the position of the valve flap 4, and prevents damage and deformation of the surfaces of the valve flap 4 and the valve seat 5 caused by the continuous movement of the valve flap 4. The buffer component is connected to the valve body 1. In the use state of the buffer component, the buffer component slows down the speed of the valve flap 4 when moving towards the valve seat 5. The buffer component continuously clamps and releases to avoid the valve flap 4 moving too fast when moving towards the valve seat 5, and prevents deformation and abrasion caused by the mutual collision of the valve flap 4 and the valve seat 5.
[0021] In an alternative embodiment, an installation groove 6 is provided on the outer peripheral wall of the valve flap 4, and a sealing ring 7 is connected within the installation groove 6. The sealing ring 7 is selected but not limited to a rubber material.
[0022] Embodiment Two
[0023] As Figures 1-3 shown, a limiting structure and a check valve proposed by the present utility model. Compared with Embodiment One, the detailed structure of the limiting component is described in this embodiment. The limiting component includes a second elastic member 8, a stop block 10, and a clamping block 11. A plurality of second elastic members 8 are circumferentially and evenly distributed around the central axis of the valve body 1. The second elastic members 8 are connected within an accommodating groove 9 provided on the valve seat 5. The second elastic members 8 are selected but not limited to springs. The number of stop blocks 10 corresponds to that of the second elastic members 8. The stop blocks 10 are slidably connected within the accommodating groove 9. One end of each stop block 10 is connected to a second elastic member 8, and the other end of the stop block 10 is slidably connected to a convex block connected to one end of the valve flap 4 close to the valve seat 5. A fillet or an arc-shaped edge is provided on the stop block 10 for contacting the convex block. The clamping block 11 is connected to the end of the valve flap 4 away from the convex block, and the clamping block 11 is slidably connected to a step provided on the valve seat 5.
[0024] In an alternative embodiment, a plurality of circumferentially distributed fixing rods 12 are connected to the fixing block 2, and the fixing rods 12 are slidably connected to through-holes provided on the clamping block 11. The fixing rods 12 limit the movement path of the valve flap 4 and prevent the problem of deviation during its movement due to external factors.
[0025] Embodiment Three
[0026] As Figure 2 、 Figure 4As shown in the figure, a limiting structure and a check valve proposed by the present utility model record the detailed structure of the buffer assembly in this embodiment compared with Embodiment 2. The buffer assembly includes a buffer rod 13, a limiting tooth 14, a fixed shaft 15, a limiting plate 16 and a third elastic member 17. One end of the buffer rod 13 is connected to the end of the valve flap 4 away from the valve seat 5, and evenly distributed limiting teeth 14 are connected to the outer peripheral wall of the buffer rod 13; the cross-sectional shape of the limiting tooth 14 is arc-shaped; two fixed shafts 15 are symmetrically arranged, and both ends of the fixed shaft 15 are connected to the accommodating cavity of the valve body 1. The number of limiting plates 16 corresponds to that of the fixed shafts 15. A convex block is connected to the side wall of the limiting plate 16, and a through hole for rotatably connecting the fixed shaft 15 is provided on the convex block. Two third elastic members 17 are symmetrically arranged, and both ends of the third elastic member 17 are connected to the two limiting plates 16; the third elastic member 17 is selected but not limited to a metal spring sheet, and both ends of the spring sheet are connected to the side walls of the two limiting plates 16, and the two spring sheets form an elastic ring approximately at the center of the circle;
[0027] In an alternative embodiment, both of the two limiting plates 16 are inclined, the limiting plates 16 are symmetrically arranged, and the distance between the limiting plates 16 decreases sequentially from top to bottom; the overall shape of the limiting plate 16 is V-shaped, and the movement of the buffer rod 13 towards the valve seat 5 is restricted by the shape of the limiting plate 16 to slow down the movement speed of the valve flap 4.
[0028] A check valve includes a limiting structure.
[0029] In summary, when the present utility model is in use, the liquid flows from the valve seat 5 towards the fixed block 2. The pressure of the liquid pushes the valve flap 4 to move and compresses the length of the first elastic member 3. The buffer rod 13 moves and contacts the limiting plate 16 through the through hole in the fixed block 2. The limiting teeth 14 and the ratchet teeth on the limiting plate 16 slide against each other. The liquid flows out from the through hole on the valve seat 5 and then flows out of the valve body 1 through the through hole in the fixed block 2. When the valve body 1 prevents the liquid from flowing back, the pressure of the liquid pushes the valve flap 4 towards the valve seat 5 and stretches the length of the first elastic member 3. At this time, the movement of the valve flap 4 drives the buffer rod 13 to move synchronously. The limiting teeth 14 on the buffer rod 13 engage with the ratchet teeth on the limiting plate 16, and the movement of the limiting teeth 14 is restricted by the gradually decreasing gap of the limiting plate 16 to prevent the valve flap 4 from moving too fast and colliding with the valve seat 5 to cause damage. When the valve flap 4 contacts the valve seat 5, it is sealed by the contact between the sealing ring 7 and the conical surface on the valve seat 5. At this time, the convex block on the valve flap 4 contacts the stop block 10 to avoid excessive extrusion of the sealing ring 7. When the liquid pressure on one side of the fixed block 2 is too high, the valve flap 4 will continue to move towards the valve seat 5 and compress the sealing ring 7. The convex block on the valve flap 4 contacts the stop block 10 and pushes the stop block 10 to compress the second elastic member 8 and retract into the accommodating groove 9. At this time, the stop block 10 contacts the valve seat 5, and the position of the valve flap 4 is restricted by their mutual engagement to prevent the valve flap 4 from continuing to move to prevent incomplete sealing caused by damage to the sealing ring 7.
[0030] The embodiments of the present utility model have been described in detail with reference to the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the spirit of the present utility model within the scope of knowledge possessed by those skilled in the relevant art.
Claims
1. A limiting structure, characterized in that: include A valve body (1) is internally connected to a fixing block (2), and the fixing block (2) is connected to one end of a first elastic member (3); A valve flap (4), one end of which is connected to the first elastic member (3); A valve seat (5) connected to the valve body (1), the valve seat (5) being slidably connected to the valve disc (4); A limit assembly connected to the valve seat (5); when the limit assembly is in use, the limit assembly limits the position of the valve flap (4) and the valve seat (5) moving toward each other; A buffer component is connected to the valve body (1); when the buffer component is in use, the buffer component slows down the speed at which the valve disc (4) moves toward the valve seat (5).
2. A limiting structure according to claim 1, characterized in that: An installation groove (6) is provided on the outer peripheral wall of the valve disc (4), and a sealing ring (7) is connected inside the installation groove (6).
3. A limiting structure according to claim 1, characterized in that: The limiter components include A plurality of second elastic members (8) are evenly distributed around the circumference, and the second elastic members (8) are connected to a receiving groove (9) provided on the valve seat (5); The number of the stoppers (10) corresponds to the number of the second elastic members (8), the stoppers (10) are slidably connected in the receiving groove (9), and one end of the stoppers (10) is connected to the second elastic member (8); A clamping block (11) is connected to the valve disc (4), and the clamping block (11) is slidably connected to a step provided on the valve seat (5).
4. A limiting structure according to claim 3, characterized in that: A plurality of circumferentially distributed fixing rods (12) are connected to the fixing block (2), and the fixing rods (12) are slidably connected to through holes provided on the clamping block (11).
5. A limiting structure according to claim 1, characterized in that: Buffer components include A buffer rod (13) connected to the valve flap (4), and evenly distributed limiting teeth (14) are connected to the outer peripheral wall of the buffer rod (13); Two fixed shafts (15) are symmetrically arranged, and both ends of the fixed shafts (15) are connected to the valve body (1); The number of the limiting plates (16) corresponds to the number of the fixed shafts (15), and the limiting plates (16) are rotatably connected to the fixed shafts (15); Two third elastic members (17) are symmetrically arranged, and two ends of the third elastic members (17) are connected to the two limiting plates (16).
6. A limiting structure according to claim 5, characterized in that: The two limiting plates (16) are both arranged in an inclined manner, the limiting plates (16) are arranged symmetrically, and the spacing between the limiting plates (16) decreases from top to bottom.
7. A check valve, characterized in that: Includes the limiting structure described in any one of requirements 1-6.