High-sealing axial-flow type check valve

Abstract

The utility model relates to the technical field of check valves, in particular to a high-sealing axial-flow type check valve which comprises a valve seat, and a sealing assembly for enhancing the sealing effect of the axial-flow type check valve is arranged in the valve seat. The sealing assembly comprises a first valve element, the outer wall of the first valve element slides in the valve seat, a pushing strip is arranged in the first valve element, a transmission block is fixedly arranged on the inner side of the pushing strip, and an inclined block is arranged on the side, away from the pushing strip, of the transmission block. The second valve element slides in the first valve element, a pushing inclined block is fixedly arranged on one side of the second valve element, and the inclined face of the inclined block is attached to the inclined face of an inclined block arranged above the transmission block. According to the axial-flow type check valve, damage to the sealing position of the valve element and the valve seat caused by impurities in water flow can be reduced through the sealing assembly, the sealing effect of the axial-flow type check valve is improved, and the possibility of leakage of the axial-flow type check valve is avoided.

Description

Technical Field

[0001] This application relates to the field of check valve technology, and in particular to a high-sealing axial flow check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent the backflow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve.

[0003] Existing check valves suffer from scratches and pits on the valve core and seat sealing surfaces due to long-term scouring by the medium or embedding of particulate impurities during use, resulting in slight leakage during forward flow and poor sealing performance. In view of this, a high-sealing axial flow check valve is proposed. Utility Model Content

[0004] This application provides a high-sealing axial flow check valve, which can improve the technical problem in the related art where long-term scouring of the medium or embedding of particulate impurities causes scratches and pits on the sealing surface of the valve core and valve seat, resulting in slight leakage during forward flow and poor sealing effect.

[0005] This application provides a high-sealing axial flow check valve, including a valve seat, wherein a sealing component is provided inside the valve seat to enhance the sealing effect of the axial flow check valve;

[0006] The sealing assembly includes,

[0007] A first valve core, the outer wall of the first valve core sliding inside the valve seat, and a push bar provided inside the first valve core, the push bar being arranged in a ring array about the axis of the first valve core, and a transmission block being fixedly provided on the inner side of the push bar;

[0008] A sealing layer is located outside the push bar;

[0009] The second valve core slides inside the first valve core, and a pushing inclined block is fixedly provided on one side of the second valve core. The inner side of the transmission block matches and slides against the inclined surface of the pushing inclined block.

[0010] Optionally, support plates are fixedly provided on both sides of the push bar, and a support spring is connected to one side of the support plate, while the other end of the support spring is connected to the inside of the first valve core.

[0011] Optionally, a first elastic element is provided inside the first valve core, and the other end of the first elastic element is connected to the side of the second valve core near the push block.

[0012] Optionally, a sliding block is fixedly provided on the side of the second valve core, and the sliding block is distributed in a ring array about the second valve core. A sliding groove is opened inside the first valve core, and the sliding block slides inside the sliding groove.

[0013] Optionally, a connecting groove is provided at the end of the first valve core away from the second valve core, a force-bearing column is engaged inside the connecting groove, a support frame is slidably provided on the outer wall of the force-bearing column, and one end of the support frame is fixedly connected to the inside of the first valve core. A second elastic element is provided on the outside of the support frame, and one end of the second elastic element is low to the end of the first valve core near the force-bearing column.

[0014] Optionally, the valve seat has a sealing groove inside, and the sealing groove is coaxially connected to the push bar.

[0015] Optionally, the sealing layer is made of rubber, and the sealing layer can be changed according to the shape of the push bar.

[0016] Optionally, the valve seat is provided with an input end and an output end at both ends.

[0017] The present invention has at least the following effects: the sealing component can reduce the damage to the valve core and valve seat seal caused by impurities in the water flow, improve the sealing effect of the axial flow check valve, and avoid the possibility of leakage in the axial flow check valve. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the high-sealing axial flow check valve provided in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the high-sealing axial flow check valve provided in the embodiments of this application;

[0020] Figure 3 A partial cross-sectional structural diagram of the sealing assembly of the high-sealing axial flow check valve provided in an embodiment of this application;

[0021] Figure 4 The high-sealing axial flow check valve provided in the embodiments of this application Figure 3 A magnified structural diagram at point A;

[0022] Figure 5 The high-sealing axial flow check valve provided in the embodiments of this application Figure 3 A magnified structural diagram at point B;

[0023] The following are the labeling elements in the figure:

[0024] 1. Valve seat; 11. Input end; 12. Output end;

[0025] 2. Sealing assembly; 201. First valve core; 202. Connecting groove; 203. Sealing layer; 204. Second valve core; 205. First elastic element; 206. Push bar; 207. Transmission block; 208. Support plate; 209. Support spring; 210. Pushing inclined block; 211. Sliding groove; 212. Sliding block;

[0026] 3. Support frame; 31. Second elastic element; 32. Force-bearing column; 33. Sealing groove. Detailed Implementation

[0027] The following combination Figures 1-5 This utility model is described in further detail.

[0028] This embodiment discloses a high-sealing axial flow check valve: including a valve seat 1, and a sealing component 2 that enhances the sealing effect of the axial flow check valve is provided inside the valve seat 1;

[0029] Sealing assembly 2 includes,

[0030] The first valve core 201 has its outer wall sliding inside the valve seat 1, and a push bar 206 is provided inside the first valve core 201. The push bar 206 is arranged in a ring array about the axis of the first valve core 201, and a transmission block 207 is fixedly provided on the inner side of the push bar 206.

[0031] Sealing layer 203, the sealing layer 203 is located outside the push bar 206;

[0032] The second valve core 204 slides inside the first valve core 201. A pusher block 210 is fixedly provided on one side of the second valve core 204. The inner side of the transmission block 207 matches and slides against the inclined surface of the pusher block 210.

[0033] This configuration reduces the damage to the valve core and valve seat 1 caused by impurities in the water flow through the sealing component 2, improves the sealing effect of the axial flow check valve, and avoids the possibility of leakage in the axial flow check valve.

[0034] Support plates 208 are fixedly installed on both sides of the push bar 206, and a support spring 209 is connected to one side of the support plate 208. The other end of the support spring 209 is connected to the inside of the first valve core 201. When the water pressure is removed, the support spring 209 pushes the support plate 208 to move the push bar 206 outward along the axial direction, and pushes the sealing layer 203 to seal, effectively improving the sealing effect of the check valve.

[0035] The first valve core 201 is provided with a first elastic element 205. The other end of the first elastic element 205 is connected to the side of the second valve core 204 near the push block 210. The second valve core 204 is supported by the pre-tightening force of the first elastic element 205. When the water flow stops, the pre-tightening force of the first elastic element 205 will push the second valve core 204 back to its original position.

[0036] A sliding block 212 is fixedly provided on the side of the second valve core 204, and the sliding block 212 is arranged in a ring array about the second valve core 204. A sliding groove 211 is provided inside the first valve core 201, and the sliding block 212 slides inside the sliding groove 211. By sliding the sliding block 212 inside the sliding groove 211, the second valve core 204 can be smoothly moved inside the first valve core 201.

[0037] A connecting groove 202 is provided at the end of the first valve core 201 away from the second valve core 204. A force-bearing column 32 is engaged inside the connecting groove 202. A support frame 3 is slidably provided on the outer wall of the force-bearing column 32, and one end of the support frame 3 is fixedly connected to the inside of the first valve core 201. A second elastic element 31 is provided on the outside of the support frame 3. One end of the second elastic element 31 is low to the end of the first valve core 201 near the force-bearing column 32. When the first valve core 201 is under force, it pushes the second elastic element 31, causing the first valve core 201 to release the seal on the inside of the valve seat 1, allowing water to flow. At the same time, after the water flow ends, the second elastic element 31 causes the first valve core 201 to return to its original position and seal the inside of the valve seat 1, thus achieving the effect of a check valve.

[0038] The valve seat 1 has a sealing groove 33 inside, and the sealing groove 33 is coaxially connected with the push bar 206. When the water flow stops, the push bar 206 is supported by the elasticity of the support spring 209, which pushes the outer side of the sealing layer 203 to deeply fit into the sealing groove 33, and the inner side of the sealing layer 203 is inside the valve seat 1, thereby improving the sealing effect of the check valve.

[0039] The sealing layer 203 is made of rubber and can be modified according to the shape of the push bar 206. It is made of softer rubber, so that when the push block expands outward along the axial direction, the inner side of the sealing layer 203 can completely fit the shape of the push bar 206, and the outer side of the sealing layer 203 fits deeply into the sealing groove 33, thereby improving the sealing effect of the check valve.

[0040] The valve seat 1 has an input end 11 and an output end 12 at both ends, and the output end 12 and the input end 11 are used to connect the pipeline.

[0041] The implementation principle of the high-sealing axial flow check valve in Embodiment 1 of this application is as follows: When the liquid flows, the second valve core 204 inside the first valve core 201 is first subjected to pressure. The pressure of the liquid on the second valve core 204 causes the second valve core 204 to move backward. When the second valve core 204 moves backward, the pushing inclined block 210 at the other end of the second valve core 204 is in contact with the inclined block surface at one end of the pushing transmission block 207, thereby causing the pushing strip 206 to contract in the axial direction, canceling the compression of the sealing layer 203, so that the outer side of the pushing strip 206 and the sealing layer 203 are separated from the inside of the sealing groove 33. Then, the first valve core 201 is subjected to pressure to compress the second elastic element 31 so that the liquid can pass through the inside of the valve seat 1.

[0042] When the liquid stops flowing, the preload applied by the second elastic element 31 pushes the first valve core 201 to retract. At the same time, when there is no liquid pressure, the second valve core 204 retracts using the first elastic element 205. When the water pressure is removed, the push bar 206, through the support spring 209, pushes the support plate 208 to move the push bar 206 outward along the axial direction, and pushes the outer side of the sealing layer 203 to deeply fit into the sealing groove 33. The inner side of the sealing layer 203 is inside the valve seat 1, which effectively improves the sealing effect of the check valve.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high sealing axial flow check valve comprising a valve seat (1), characterized in that: The valve seat (1) is provided with a sealing component (2) to enhance the sealing effect of the axial flow check valve; The sealing assembly (2) includes, The first valve core (201) has an outer wall that slides inside the valve seat (1), and a push bar (206) is provided inside the first valve core (201). The push bar (206) is arranged in a ring array about the axis of the first valve core (201), and a transmission block (207) is fixedly provided on the inner side of the push bar (206). A sealing layer (203) is located outside the push bar (206); The second valve core (204) slides inside the first valve core (201). A pusher block (210) is fixedly provided on one side of the second valve core (204). The inner side of the transmission block (207) matches and slides against the inclined surface of the pusher block (210).

2. A high seal axial check valve according to claim 1, characterized in that: Support plates (208) are fixedly provided on both sides of the push bar (206), and a support spring (209) is connected to one side of the support plate (208), and the other end of the support spring (209) is connected to the inside of the first valve core (201).

3. A high seal axial flow check valve according to claim 2, wherein: The first valve core (201) is provided with a first elastic element (205), and the other end of the first elastic element (205) is connected to the side of the second valve core (204) near the push block (210).

4. A high seal axial flow check valve according to claim 3 wherein: The second valve core (204) is fixedly provided with a sliding block (212) on its side, and the sliding block (212) is arranged in a ring array about the second valve core (204). The first valve core (201) is provided with a sliding groove (211), and the sliding block (212) slides inside the sliding groove (211).

5. A high seal axial flow check valve according to claim 4 wherein: The first valve core (201) has a connecting groove (202) at the end away from the second valve core (204). A force-bearing column (32) is engaged inside the connecting groove (202). A support frame (3) is slidably provided on the outer wall of the force-bearing column (32). One end of the support frame (3) is fixedly connected to the inside of the first valve core (201). A second elastic element (31) is provided on the outside of the support frame (3). One end of the second elastic element (31) is low to the end of the first valve core near the force-bearing column (32).

6. A high seal axial flow check valve according to claim 1, wherein: The valve seat (1) is provided with a sealing groove (33) inside, and the sealing groove (33) is coaxially connected with the push bar (206).

7. A high seal axial flow check valve according to claim 1, wherein: The sealing layer (203) is made of rubber and can be changed according to the shape of the push bar (206).

8. A high seal axial flow check valve according to claim 1, wherein: The valve seat (1) is provided with an input end (11) and an output end (12) at both ends.

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