Check valve

Abstract

The check valve comprises a valve body with an internal channel, a valve seat, a check ring and a valve element, the valve seat, the check ring and the valve element are located in the internal channel, a valve port is formed in one end of the valve seat, a valve element cavity is formed by the check ring and one end of the valve port of the valve seat, the valve element is movably arranged in the valve element cavity, the valve element is provided with a circular-ring-shaped guide part, and the circular-ring-shaped guide part is connected with the check ring. The check ring is provided with a first guide section and a second guide section, the valve port end of the valve seat is sleeved with the first guide section, the second guide section corresponds to the annular guide portion of the valve element, the unilateral fit clearance t between the second guide section and the inner wall of the annular guide portion of the valve element is larger than or equal to 0.05 mm and smaller than or equal to 0.2 mm. The check ring and the valve element form a damping structure, noise generated by vertical impact of the valve element is reduced, and a spring mechanism is prevented from being additionally arranged. And t is larger than or equal to 0.05 mm and smaller than or equal to 0.2 mm, the impact noise of the valve element can be reduced within the gap range, the damping effect is achieved, and then the shock absorption and noise reduction effects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve manufacturing technology, specifically to a check valve. Background Technology

[0002] Air conditioners are now an indispensable household appliance. With the continuous advancement of urbanization, people are increasingly pursuing a high-quality lifestyle and paying more attention to the comfort experience of air conditioners. As key moving parts, valves are significantly affected by electromagnetic and mechanical noise, which greatly impacts the customer experience. With the market development of variable flow technology, the noise problem of check valves is receiving increasing attention. Currently, air conditioner check valves on the market include a connecting pipe, a valve seat for backflow prevention, a valve core with a moving seal, and a stopper for the valve core. To facilitate welding, the connecting pipe is usually made of copper, and the seal between the valve seat and the connecting pipe is achieved by pressing and deforming copper tubing. The valve core is generally made of nylon. The stopper is connected by fitting a hole drilled in the valve seat. Currently, some check valves on the market lack a buffer structure during opening and closing, resulting in rigid impacts between the valve core and the valve seat or stopper, causing mechanical noise and affecting the user experience. Therefore, existing technology needs further development. Utility Model Content

[0003] This utility model provides a check valve, the specific implementation of which is as follows:

[0004] A check valve includes a valve body with an internal channel, a valve seat, a retaining ring, and a valve core located within the internal channel. One end of the valve seat has a valve port. The retaining ring and the valve port of the valve seat form a valve core cavity. The valve core is movably disposed within the valve core cavity. The valve core has an annular guide portion. The retaining ring has a first guide section and a second guide section. The first guide section is sleeved on the valve port end of the valve seat. The second guide section corresponds to the annular guide portion of the valve core. The single-sided fitting clearance t between the second guide section and the inner wall of the annular guide portion of the valve core is 0.05mm ≤ t ≤ 0.2mm.

[0005] Furthermore, the central axis of the first guide segment coincides with the central axis of the second guide segment, forming a coaxial structure.

[0006] Furthermore, the second guide section is an annular cavity, and at least one inner hole is provided on the side wall of the annular cavity.

[0007] Furthermore, the distance between the bottom end face of the inner hole and the bottom of the second guide section is set to A, and the axial length of the annular guide part is L, where A≥0.5L.

[0008] Furthermore, the distance between the top end face of the inner hole and the top of the second guide section is set to B, and the axial length of the annular guide part is L, where B ≥ L.

[0009] Furthermore, the area of ​​the inner hole is greater than or equal to the area of ​​the valve port.

[0010] Furthermore, a sealing surface is provided at the bottom of the annular guide corresponding to the valve port. The sealing surface is an inclined surface with an inclination angle of 50-90°.

[0011] Furthermore, a damping hole is provided at the top of the second guide section, and the diameter of the damping hole is 0.05mm-1.5mm.

[0012] Furthermore, the outer wall of the valve seat is fitted with the inner wall of the valve body.

[0013] Beneficial effects:

[0014] 1. The check valve of this utility model forms a damping structure through the cooperation of the retaining ring and the valve core, which reduces the noise generated by the up and down impact of the valve core and avoids the need for an additional spring mechanism.

[0015] 2. Adjust the fit clearance t between the second guide section and the inner wall of the annular guide part of the valve core, 0.1mm≤t≤0.4mm, within this range to further realize the vibration reduction and noise reduction function when the valve core and the retaining ring move. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the check valve of this utility model;

[0017] Figure 2 yes Figure 1 A magnified view of position C;

[0018] Figure 3 This is a schematic diagram of the retaining ring structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the retaining ring of this utility model;

[0020] Figure 5 This is a schematic diagram of the valve core of this utility model;

[0021] Figure 6 This is a cross-sectional view of the valve core of this utility model;

[0022] Figure 7 This is a schematic diagram of the valve seat of this utility model.

[0023] The above figures include the following reference numerals:

[0024] 1. Valve body; 2. Valve seat; 21. Valve port; 3. Retaining ring; 31. First guide section; 32. Second guide section; 33. Inner hole; 34. Damping hole; 4. Valve core; 41. Circular guide part; 42. Sealing surface. Detailed Implementation

[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0026] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0027] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0028] According to an embodiment of this utility model, a check valve is provided. Please refer to [link / reference]. Figures 1 to 7 The valve includes a valve body 1 with an internal channel, a valve seat 2, a retaining ring 3, and a valve core 4 located within the internal channel. One end of the valve seat 2 has a valve port 21. The retaining ring 3 and the valve port 21 of the valve seat 4 form a valve core cavity. The valve core 4 is movably disposed within the valve core cavity. The valve core 4 has an annular guide portion 41. The retaining ring 3 has a first guide section 31 and a second guide section 32. The first guide section 31 is sleeved on the valve port 21 end of the valve seat 2. The second guide section 32 corresponds to the annular guide portion 41 of the valve core 4. The single-sided fitting clearance between the second guide section 32 and the inner wall of the annular guide portion 41 of the valve core 4 is t, where 0.05mm ≤ t ≤ 0.2mm. Figure 1 As shown, the retaining ring 3 and the valve core 4 form a damping structure, reducing the noise generated by the up-and-down impact of the valve core 4 and avoiding the need for a new spring mechanism. The damping mechanism performs the functions of a gas spring and a liquid spring, achieving the purpose of vibration reduction and noise reduction. Figure 2 As mentioned above, within the gap range of 0.05mm≤t≤0.2mm, the impact noise of valve core 4 can be reduced, achieving a damping effect and thus reducing vibration and noise.

[0029] like Figure 3 As shown, the central axis of the first guide section 31 coincides with the central axis of the second guide section 32, forming a coaxial structure. Specifically, the first guide section 31 mates with the valve seat 2. To ensure coaxiality, an interference fit or a transition fit is used. For reliable connection, welding can also be used for fixing, or it can be used to limit movement by mates with the valve body 1. The central axis of the second guide section 32 coincides with the central axis of the annular guide portion 41 of the valve core 4.

[0030] The second guide section 32 is an annular cavity, and at least one inner hole 33 is provided on the side wall of the annular cavity. The annular cavity can accommodate the annular guide portion 41 of the valve core 4. The inner hole 33 can be a circular inner hole or a square inner hole. The inner hole 33 allows fluid to pass through.

[0031] like Figure 4 and Figure 6 As shown, the distance between the bottom end face of the inner hole 33 and the bottom of the second guide section 32 is set to A, and the axial length of the annular guide part 41 is L, where A ≥ 0.5L. This ensures that the valve core 4 can open the valve stably, while reducing the impact between the valve core 4 and the valve port 21, thus reducing noise.

[0032] The distance between the top end face of the inner hole 33 and the top of the second guide section 32 is set to B, and the axial length of the annular guide part 41 is L. B ≥ L is set to ensure the valve core 4 can be fully open to guarantee the valve's flow capacity. Within this range, the valve core 4 can be fully open to guarantee the valve's flow capacity, and the larger B is, the better the noise reduction effect.

[0033] The area of ​​the inner hole 33 is greater than or equal to the area of ​​the valve port 21, thereby significantly increasing the flow rate.

[0034] like Figure 5 , Figure 6 and Figure 7 As shown, a sealing surface 42 is provided at the bottom of the annular guide portion 41 corresponding to the valve port 21. The sealing surface 42 is an inclined surface, and the inclination angle α of the sealing surface 42 is 50-90°. This further improves the sealing performance and can also synergistically reduce the impact noise between the stop valve core 4 and the valve port 21.

[0035] like Figure 3 As shown, a damping hole 34 is provided at the top of the second guide section 32, and the diameter of the damping hole 34 is 0.05mm-1.5mm. Within this range, the damping effect can be increased.

[0036] like Figure 1 As shown, the outer wall of the valve seat 2 is fitted to the inner wall of the valve body 1. The outer wall of the valve seat 2 and the inner wall of the valve body 1 are joined together by heating and welding.

[0037] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A check valve, characterized in that, The valve includes a valve body with an internal channel, a valve seat, a retaining ring, and a valve core located within the internal channel. One end of the valve seat has a valve port, and the retaining ring and the valve port end of the valve seat form a valve core cavity. The valve core is movably disposed within the valve core cavity. The valve core has an annular guide portion, and the retaining ring has a first guide section and a second guide section. The first guide section is sleeved on the valve port end of the valve seat, and the second guide section is correspondingly disposed with the annular guide portion of the valve core. The single-sided fitting clearance between the second guide section and the inner wall of the annular guide portion of the valve core is t, where 0.05mm≤t≤0.2mm.

2. The check valve according to claim 1, characterized in that, The central axis of the first guide segment coincides with the central axis of the second guide segment, forming a coaxial structure.

3. The check valve according to claim 1, characterized in that, The second guide section is an annular cavity, and at least one inner hole is provided on the side wall of the annular cavity.

4. The check valve according to claim 3, characterized in that, The distance between the bottom end face of the inner hole and the bottom of the second guide section is set as A, and the axial length of the annular guide part is L, where A≥0.5L.

5. The check valve according to claim 3, characterized in that, The distance between the top end face of the inner hole and the top of the second guide section is set as B, and the axial length of the annular guide part is L, where B ≥ L.

6. The check valve according to claim 3, characterized in that, The area of ​​the inner hole is greater than or equal to the area of ​​the valve port.

7. The check valve according to claim 1, characterized in that, The bottom of the annular guide is provided with a sealing surface corresponding to the valve port. The sealing surface is an inclined surface with an inclination angle of 50-90°.

8. The check valve according to claim 1, characterized in that, The top of the second guide section is provided with a damping hole, the diameter of which is 0.05mm-1.5mm.

9. The check valve according to claim 1, characterized in that, The outer wall of the valve seat is fitted to the inner wall of the valve body.

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