Check valve

Abstract

The utility model provides a check valve which comprises a valve body with an internal channel, a valve seat, a check ring and a valve core, the valve seat, the check ring and the valve core are located in the internal channel, one end of the valve seat is provided with a valve port, the check ring and one end of the valve port of the valve seat form a valve core cavity, and the valve core is movably arranged in the valve core cavity. The valve element is provided with a guide seat and a guide shaft arranged on the guide seat, the check ring is provided with a first guide section, a second guide section and a third guide section, the first guide section is arranged at the valve port end of the valve seat in a sleeving mode, the second guide section corresponds to the guide seat, and the third guide section corresponds to the guide shaft. 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. The damping mechanism achieves the functions of a gas spring and a liquid spring, and the purposes of vibration and noise reduction are achieved. The damping structure formed by the check ring and the valve element in a matched mode has self-adaptability, the damping effect is improved along with increase of the system pressure difference, and spring adjustment or flow capacity adjustment is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve preparation technical field, concretely relates to a check valve. BACKGROUND

[0002] Air conditioner is the white electrical product which is indispensable in family at present, along with the unceasing advancement of urbanization, people pursue high quality life more and more, and pay more and more attention to the comfort experience of air conditioner. And valve piece is the key action component, electromagnetic noise, mechanical noise etc. very influence customer experience, wherein along with the market development of variable flow technology, the abnormal sound problem of check valve is paid more and more attention. The check valve of air conditioner on the market at present includes connector, valve seat for reverse check, movable sealing piece valve core and blocking piece of check valve core, for the convenience of customer welding, usually, the material of connector is purple copper, the sealing of valve seat and connector adopts the extrusion sealing of tight deformation purple copper pipe, and the valve core generally uses nylon material. The blocking piece is connected through the aperture drilled on the valve seat. Some check valves on the market can prevent the noise generated by the rotation of valve core, but there is no solution to the abnormal sound of valve core up and down impact. Therefore, the prior art needs further development. SUMMARY

[0003] The utility model provides a check valve, specific implementation mode is as follows:

[0004] A check valve, including the valve body with internal passage and the valve seat, the retaining ring and the valve core in the internal passage, the valve seat one end is equipped with the valve port, the retaining ring and the valve port one end of valve seat form the valve core cavity, the valve core is movably arranged in the valve core cavity, the valve core has the guide seat and the guide shaft on the guide seat, the retaining ring has the first guide section, the second guide section and the third guide section, the first guide section is set in the valve port end of valve seat, the second guide section is correspondingly arranged with the guide seat, the third guide section is correspondingly arranged with the guide shaft.

[0005] Further, the third guide section is a positioning sleeve with an inner diameter gap-fitting with an outer diameter of the guide shaft.

[0006] Further, the gap between the third guide section and the guide shaft is 0.05mm-0.7mm.

[0007] Further, the inner diameter of the second guide section gap-fits with the outer diameter of the guide seat.

[0008] Further, at least one flow hole is provided on the side wall of the second guide section.

[0009] Further, an arc-shaped sealing surface is provided on the bottom of the guide seat corresponding to the valve port.

[0010] Further, the first guide section and the valve seat are fixed by interference fit or welding.

[0011] Further, the outer wall of the valve seat is matched with the inner wall of the valve body.

[0012] Further, the outer wall of the valve seat is matched with the inner wall of the valve body.

[0013] Further, the outer wall of the valve seat is matched with the inner wall of the valve body.

[0014] Beneficial effects:

[0015] 1. The check valve of the utility model forms damping structure through the cooperation of the check ring and the valve core, reduces the noise generated by the up and down impact of the valve core, and avoids adding spring mechanism.

[0016] 2. The damping structure formed by the cooperation of the check ring and the valve core has self-adaptability, and the damping effect increases with the increase of the system pressure difference, thereby avoiding the adoption of spring adjustment or flow capacity adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structural schematic diagram of the check valve of the utility model;

[0018] Figure 2 is the structural schematic diagram of the check ring of the utility model;

[0019] Figure 3 is the sectional view of the check ring of the utility model;

[0020] Figure 4 is the structural schematic diagram of the valve core of the utility model;

[0021] Figure 5 is the sectional view of the valve core of the utility model;

[0022] Figure 6 is the structural schematic diagram of the valve seat of the utility model.

[0023] Among them, the above-mentioned drawings include the following reference signs:

[0024] 1. valve body; 2. valve seat; 21. valve port; 22. solder groove; 3. check ring; 31. first guide section; 32. second guide section; 33. third guide section; 34. flow-through hole; 35. pressure relief hole; 4. valve core; 41. guide shaft; 42. guide seat; 43. arc-shaped sealing surface. DETAILED DESCRIPTION

[0025] The specific implementation manner of the utility model will be described below in combination with the 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 6 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 2 form a cavity for the valve core 4. The valve core 4 is movably disposed within the cavity. The valve core 4 has a guide seat 42 and a guide shaft 41 disposed on the guide seat 42. The retaining ring 3 has a first guide section 31, a second guide section 32, and a third guide section 33. The first guide section 31 is sleeved on the valve port 21 end of the valve seat 2. The second guide section 32 is correspondingly disposed with the guide seat 42, and the third guide section 33 is correspondingly disposed with the guide shaft 41. 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 an additional spring mechanism. The damping mechanism realizes the functions of a gas spring and a liquid spring, achieving the purpose of vibration reduction and noise reduction.

[0029] like Figure 2 and Figure 4 As shown, the third guide section 33 is a positioning sleeve with an inner diameter that is clearance-fitted to the outer diameter of the guide shaft 41. Specifically, the guide shaft 41 can be inserted into the positioning sleeve to ensure coaxiality between the guide shaft 41 and the third guide section 33. The clearance between the third guide section 33 and the guide shaft 41 is 0.05mm-0.7mm. Within this clearance range, the impact noise of the valve core 4 can be reduced, achieving a damping effect and thus reducing vibration and noise.

[0030] like Figure 2 and Figure 3 As shown, the inner diameter of the second guide section 32 is clearance-fitted with the outer diameter of the guide seat 42. The cooperation between the second guide section 32 and the guide seat 42 ensures that they maintain coaxiality, further reducing the impact noise of the valve core 4.

[0031] like Figure 2 As shown, a pressure relief hole 35 can be provided at the top of the second guide section 32, but the diameter of the pressure relief hole 35 is 0.2-1mm. Within this range, the damping effect can be increased.

[0032] At least one flow hole 34 is provided on the side wall of the second guide section 32. The flow hole 34 allows fluid to pass through; specifically, the flow hole can be square, circular, or other shapes.

[0033] like Figure 4 and Figure 5 As shown, the bottom of the guide seat 42 is provided with an arc-shaped sealing surface 43 corresponding to the valve port 21. When the guide seat 42 of the valve core 4 contacts the valve port 21, a sealing state is formed between the two, and the valve port 21 is closed to prevent the reverse flow of fluid.

[0034] The first guide section 31 and the valve seat 2 are fixed by interference fit or welding. The first guide section 31 and the valve seat 2 are coaxial and can be fixed by interference fit, or by welding for reliable connection. Alternatively, the first guide section 31 can be fixed by fitting with the valve body 1 for limiting.

[0035] like Figure 6 As shown, the outer wall of the valve seat 2 is fitted to the inner wall of the valve body 1. A solder groove 22 for placing solder is provided on the outer wall of the valve seat 2. Solder is placed in the solder groove 22, and then the outer wall of the valve seat 2 is joined to the inner wall of the valve body 1. Heating is then performed, the solder melts, and the two are welded together.

[0036] The valve core 4 can be integrally formed from a bar stock and then machined. To achieve the same function, it can also be assembled in sections by press fitting. Of course, the guide seat and guide shaft of the valve core can also be detachably connected.

[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 a guide seat and a guide shaft disposed on the guide seat. The retaining ring has a first guide section, a second guide section, and a third guide section. The first guide section is sleeved on the valve port end of the valve seat, the second guide section is correspondingly disposed with the guide seat, and the third guide section is correspondingly disposed with the guide shaft.

2. The check valve according to claim 1, characterized in that, The third guide section is a positioning sleeve whose inner diameter is clearance-fitted with the outer diameter of the guide shaft.

3. The check valve according to claim 2, characterized in that, The clearance between the third guide section and the guide shaft is 0.05mm-0.7mm.

4. The check valve according to claim 1, characterized in that, The inner diameter of the second guide section is clearance-fitted with the outer diameter of the guide seat.

5. The check valve according to claim 1, characterized in that, At least one flow hole is provided on the side wall of the second guide section.

6. The check valve according to claim 1, characterized in that, The bottom of the guide seat is provided with an arc-shaped sealing surface corresponding to the valve port.

7. The check valve according to claim 1, characterized in that, The first guide section and the valve seat are fixed by interference fit or welding.

8. 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.

9. The check valve according to claim 1, characterized in that, The outer wall of the valve seat is provided with a solder groove for placing solder.

10. The check valve according to claim 1, characterized in that, The guide seat and guide shaft of the valve core are either integrally formed or detachably connected.

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