Guiding stop check valve
By designing the structure of the guide rod, slide rod, buffer plate, first damping spring and buffer block in the guide stop check valve, the problem of valve disc offset caused by the impact of the return water flow is solved, and a better sealing effect and water return blocking effect are achieved.
Patent Information
- Application Number
- CN202421925416.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing guide shut-off check valve is prone to offset the valve disc due to the impact force of the return water when the water is backflowing, which in turn affects the sealing effect and the water return prevention effect.
A guide stop check valve including a guide rod, a slide rod, a buffer plate, a first damping spring and a buffer block are designed. Through the cooperation of the guide rod and the slide rod, the buffer structure of the buffer plate and the first damping spring, and the secondary buffering of the buffer block, the impact force of the return flow flow is reduced and the valve disc is prevented from being offset.
It effectively reduces the impact force of the return flow water flow, prevents the valve disc from being offset, improves the sealing effect of the valve and the ability to prevent water return flow, and ensures the forward flow of the water flow.
Smart Images
Figure CN223004496U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, and particularly relates to a guiding globe 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 is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve, including a lift check valve. The lift check valve is similar in structure to a globe valve, only lacking a valve stem for driving the valve flap. It guides the valve flap through the cut-off flow, has a guiding property. When working, the medium flows in from the inlet end and out from the outlet end. When the inlet pressure is greater than the sum of the valve flap weight and its flow resistance, the valve is opened. Conversely, when the medium flows backward, the valve closes. The check valve is commonly used as the bottom valve of a pumping device to prevent the backflow of water.
[0003] However, in the process of using the guiding globe check valve in the prior art, due to the large impact force of the backflow water, it is possible that the water will impact the valve flap when flowing backward, and then it is possible to cause the deviation of the valve flap. The deviation of the valve flap and long-term use are likely to lead to a worse and worse sealing effect, and may also affect the effect of the valve flap in preventing the backflow of water. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a guiding globe check valve to solve the problems raised in the above background art.
[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: A guiding globe check valve includes a valve body. At both ends inside the valve body, an inlet passage and an outlet passage are respectively provided. A valve flap is arranged between the inlet passage and the outlet passage. A guide rod is connected to the valve body, and the guide rod is arranged corresponding to the valve flap. A valve cover is arranged above the valve body. The valve cover is provided with a first sliding hole, and the guide rod is slidably connected to the first sliding hole. The inner wall of the outlet passage is provided with a plurality of fixing blocks. The fixing blocks are arranged at intervals along the circumferential direction of the inlet passage and staggered axially. The fixing blocks are provided with second sliding holes. A sliding rod is slidably connected in the second sliding holes. A buffer plate is arranged at one end of the sliding rod away from the valve flap. A first damping spring is sleeved on the sliding rod. One end of the first damping spring is connected to the fixing block and the other end is connected to the buffer plate. A plurality of first through holes are provided on the side wall of the buffer plate. A plurality of buffer blocks are arranged along the circumferential direction on the inner wall of the outlet passage between the valve flap and the fixing block. A plurality of second through holes are provided in the buffer blocks.
[0006] With the above technical solution, when the valve is opened, the guide rod is moved upward. The upward movement of the guide rod releases the downward pressure on the valve flap, and the valve flap is pushed open by the water flow thrust in the inlet passage, thus achieving circulation. When it is necessary to close, the slide rod is moved downward, and the valve flap is pressed downward by the slide rod to disconnect the inlet passage from the outlet passage, so that the water flow is cut off. When the water flow backflows, the backflowing water flow first impacts the buffer plate. The multiple buffer plates are arranged staggeredly, which can form a relatively complete contact area with the water flow. After receiving the impact force, the buffer plate transmits it to the first damping spring. The slide rod slides along the second slide hole while the first damping spring is compressed, so that the impact force is reduced. The water flow passing through the buffer plate then flows to the buffer block for secondary buffering, thus greatly weakening the impact of the backflowing water flow and preventing the valve flap from being offset due to the impact. The first through hole is provided on the buffer plate and the second through hole is provided on the buffer block, so that the fluidity can be maintained when the water flow is flowing forward.
[0007] As a further optimization of the present utility model, a groove is concavely formed on one side of the buffer plate away from the fixed block.
[0008] With the above technical solution, by providing the groove, the contact area between the buffer plate and the backflowing water flow is increased, and the effect of reducing its impact force is further improved.
[0009] As a further optimization of the present utility model, one side of the buffer block facing the valve flap is arc-shaped and the side away from the valve flap is flat.
[0010] With the above technical solution, when the water flow is flowing forward, the arc surface of the buffer block can guide the water flow, which is helpful for the forward flow of the water flow. When the water flow backflows, the flat surface of the buffer block can block the water flow.
[0011] As a further optimization of the present utility model, a limit block is provided at one end of the slide rod close to the buffer block, and the cross-sectional area of the limit block is larger than the cross-sectional area of the second slide hole.
[0012] With the above technical solution, the limit block can prevent the slide rod from slipping out of the second slide hole when sliding, playing a limiting role.
[0013] As a further optimization of the present utility model, a plurality of installation grooves are circumferentially formed on the inner wall of the valve cover. An abutting block and a second damping spring are provided in the installation groove. The abutting block elastically protrudes partially out of the groove, and the outer end surface of the abutting block is arc-shaped.
[0014] With the above technical solution, when the guide rod is deflected, it will exert a pressure on the abutting block, thereby squeezing the second damping spring. After being compressed, the second damping spring generates a reaction force, which plays a role in correcting the deviation of the guide rod, thus ensuring the smooth sliding of the guide rod and maintaining the aligned position between the guide rod and the valve flap.
[0015] The beneficial effects of the present utility model are as follows: When the valve is opened, the guide rod is moved upward. The upward movement of the guide rod releases the downward pressure on the valve flap, and the valve flap is pushed open by the water flow thrust in the inlet passage, thereby achieving circulation. When it is necessary to close, the slide rod is moved downward, and the valve flap is pressed downward through the slide rod to disconnect the inlet passage from the outlet passage, so that the water flow is cut off. When there is a situation of water flow backflow, the backflowing water flow first impacts the buffer plate. The multiple buffer plates are arranged in a staggered manner, which can form a relatively complete contact area with the water flow. After receiving the impact force, the buffer plate transmits it to the first damping spring. The slide rod slides along the second slide hole while the first damping spring is compressed, thereby reducing the impact force. The water flow passing through the buffer plate then flows to the buffer block for secondary buffering, thus greatly weakening the impact of the backflowing water flow and preventing the valve flap from being offset due to the impact. The first through hole is provided on the buffer plate and the second through hole is provided on the buffer block, so as to maintain the fluidity when the water flow is flowing forward. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic structural diagram of the present utility model;
[0017] Figure 2 is a partially enlarged schematic diagram of the present utility model.
[0018] The meanings of the reference numerals in the figure: 1, valve body; 11, inlet passage; 12, outlet passage; 13, valve flap; 14, guide rod; 15, valve cover; 151, first slide hole; 2, fixed block; 21, second slide hole; 3, slide rod; 31, limit block; 4, first damping spring; 5, buffer plate; 51, first through hole; 6, buffer block; 61, second through hole; 7, installation groove; 8, second damping spring; 9, abutting block. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] This specific embodiment is only an explanation of the present utility model, and it is not a limitation of the present utility model. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.
[0020] See the attached Figure 1-2 , in this embodiment disclosed by the present utility model, it is further provided: a guiding globe check valve, including a valve body 1. At both ends inside the valve body 1, an inlet passage 11 and an outlet passage 12 are respectively provided. A valve flap 13 is provided between the inlet passage 11 and the outlet passage 12. A guide rod 14 is connected to the valve body 1, and the guide rod 14 is arranged corresponding to the valve flap 13. A valve cover 15 is provided above the valve body 1. The valve cover 15 is provided with a first slide hole 151, and the guide rod 14 is slidably connected to the first slide hole 151. An operating component for operating the up and down movement of the valve rod is provided at the upper end of the guide rod 14;
[0021] The inner wall of the outlet passage 12 is provided with a plurality of fixing blocks 2. The fixing blocks 2 are arranged at intervals along the circumferential direction of the inlet passage 11 and staggered axially. The fixing blocks 2 are provided with second sliding holes 21. A sliding rod 3 is slidably connected in the second sliding holes 21. One end of the sliding rod 3 away from the valve flap 13 is provided with a buffer plate 5. A first damping spring 4 is sleeved on the sliding rod 3. One end of the first damping spring 4 is connected to the fixing block 2 and the other end is connected to the buffer plate 5. A plurality of first through holes 51 are provided on the side wall of the buffer plate 5. Further, a groove is formed by concaving the side of the buffer plate 5 away from the fixing block 2. A limiting block 31 is provided at one end of the sliding rod 3 close to the buffer block 6. The cross-sectional area of the limiting block 31 is larger than the cross-sectional area of the second sliding hole 21;
[0022] A plurality of buffer blocks 6 are arranged along the circumferential direction on the inner wall of the outlet passage 12 between the valve flap 13 and the fixing block 2. The buffer blocks 6 are provided with a plurality of second through holes 61. Further, the side of the buffer block 6 facing the valve flap 13 is arc-shaped and the side away from the valve flap 13 is flat;
[0023] Further, a plurality of installation grooves 7 are formed along the circumferential direction on the inner wall of the valve cover 15. An abutting block 9 and a second damping spring 8 are arranged in the installation grooves 7. The abutting block 9 elastically protrudes partially out of the groove. The outer end face of the abutting block 9 is arc-shaped. When the guide rod 14 is deflected, a pressure will be generated on the abutting block 9, thereby squeezing the second damping spring 8. After being compressed, the second damping spring 8 generates a reaction force, thereby playing a role in correcting the deviation of the guide rod 14, ensuring the smooth sliding of the guide rod 14, and maintaining the alignment position of the guide rod 14 and the valve flap 13.
[0024] The principle of the present utility model is as follows: when opening the valve, the guide rod 14 is controlled to move upward through the operating assembly. The upward movement of the guide rod 14 releases the downward pressure on the valve flap 13. Under the water flow thrust of the inlet passage 11, the valve flap 13 is pushed open, thereby realizing the flow-through.
[0025] When it is necessary to close, the sliding rod 3 is moved downward. The valve flap 13 is pressed downward through the sliding rod 3 to disconnect the inlet passage 11 from the outlet passage 12, so that the water flow is cut off. When there is a situation of water flow backflow, the backflowing water flow first impacts the buffer plate 5. The plurality of buffer plates 5 are arranged in a staggered manner, and can form a relatively complete contact area with the water flow. After receiving the impact force, the buffer plate 5 transmits it to the first damping spring 4. The sliding rod 3 slides along the second sliding hole 21 while the first damping spring 4 is compressed, thereby reducing the impact force. The setting of the limiting block 31 can prevent the sliding rod 3 from slipping out of the second sliding hole 21 during sliding, playing a limiting role.
[0026] The water flow passing through the buffer plate 5 then flows to the buffer block 6 for secondary buffering. The flat surface of the buffer block 6 can block the water flow, thereby greatly weakening the impact of the backflowing water flow and preventing the valve flap 13 from being offset due to the impact;
[0027] A first through hole 51 is provided on the buffer plate 5 and a second through hole 61 is provided on the buffer block 6, so as to maintain the fluidity when the water flow circulates forward. When the water flow flows forward, the arc surface of the buffer block 6 can guide the water flow, which helps the forward circulation of the water flow.
[0028] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made under the above assumptions should also be regarded as the protection scope of the present invention.
Claims
1. A guided stop check valve, comprising a valve body (1), wherein the two ends of the valve body (1) are respectively provided with an inlet channel (11) and an outlet channel (12), a valve flap (13) is provided between the inlet channel (11) and the outlet channel (12), a guide rod (14) is connected to the valve body (1), the guide rod (14) and the valve flap (13) are arranged correspondingly, a valve cover (15) is provided above the valve body (1), the valve cover (15) is provided with a first sliding hole (151), the guide rod (14) and the first sliding hole (151) are slidably connected, and characterized in that: The inner wall of the outlet channel (12) is provided with a plurality of fixed blocks (2), the fixed blocks (2) are arranged at intervals in the circumferential direction and staggered in the axial direction along the inlet channel (11), the fixed block (2) is provided with a second sliding hole (21), a sliding rod (3) is slidably connected in the second sliding hole (21), a buffer plate (5) is provided at one end of the sliding rod (3) away from the valve flap (13), a first damping spring (4) is sleeved on the sliding rod (3), one end of the first damping spring (4) is connected to the fixed block (2), and the other end is connected to the buffer plate (5), a side wall of the buffer plate (5) is provided with a plurality of first through holes (51), the inner wall of the outlet channel (12) between the valve flap (13) and the fixed block (2) is provided with a plurality of buffer blocks (6) along the circumferential direction, and the buffer block (6) is provided with a plurality of second through holes (61).
2. A directional stop check valve according to claim 1, characterized in that: The side of the buffer plate (5) away from the fixing block (2) is concave to form a groove.
3. A guided stop check valve according to claim 1 or 2, characterized in that: The side of the buffer block (6) facing the valve flap (13) is in the form of an arc surface, and the side away from the valve flap (13) is in the form of a plane.
4. A directional stop check valve according to claim 1, characterized in that: A limit block (31) is provided at one end of the slide rod (3) close to the buffer block (6), and the cross-sectional area of the limit block (31) is larger than the cross-sectional area of the second slide hole (21).
5. The directional stop check valve according to claim 1, characterized in that: The valve cover (15) is provided with a plurality of mounting grooves (7) along the circumferential direction on the inner wall. An abutment block (9) and a second damping spring (8) are provided in the mounting groove (7). The abutment block (9) partially extends out of the groove elastically, and the outer end surface of the abutment block (9) is an arc surface.