One-way valve

Abstract

The utility model provides a one-way valve which comprises a valve body pipe, a valve seat, a valve element and a baffle ring which are sequentially arranged at intervals in the axial extending direction of the valve body pipe, the valve seat and the baffle ring are fixedly connected with the valve body pipe, and the valve seat is provided with an overflowing hole penetrating in the axial direction. The valve element can be assembled in the valve body pipe in a sliding mode in the axial direction so as to be provided with a forward communication position for guiding the overflowing hole and a reverse cut-off position for cutting off the overflowing hole, the rotation stopping piece is provided with an axial rotation stopping rod and a stop rod perpendicular to the rotation stopping rod, the first end of the rotation stopping rod is fixedly connected with the baffle ring, and the second end of the rotation stopping rod is fixedly connected with the valve body pipe. The second end of the rotation stopping rod extends in the axial direction and penetrates through the axial overflowing gap of the valve element. The precision of the rotation stopping piece can be higher than that of steel wire bending through punch forming, and therefore the connection reliability between the rotation stopping piece and the steel wire can be effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid flow direction switching valve design, in particular to a one-way valve. Background Art

[0002] One-way valves are widely used in air conditioning heat pump systems to limit the flow direction of refrigerant fluid in one direction. The valve core in the valve tube of the one-way valve is easy to rotate around its own axis under the impact of the compressor's surging refrigerant. Friction is formed between the rotating valve core and the inner wall of the valve body tube, thereby generating abnormal noise, which causes discomfort to users during the operation of the air conditioning heat pump. In order to overcome the above-mentioned shortcomings, a one-way valve with the publication number of CN 113653838 A is proposed, which limits the circumferential rotation of the valve core by arranging a retaining ring in the valve tube and a stop rod connected to the retaining ring. However, in actual application, the inventor found that the length of the fitting section between the stop rod and the retaining ring of this structure is limited, and the two are difficult to be completely clamped. In addition, the shape of the stop rod is relatively complex, and it is relatively difficult to manufacture and process. Summary of the invention

[0003] The one-way valve designed in the present invention can at least partially solve the above problems.

[0004] The utility model aims to provide a one-way valve, comprising: a valve body tube, on which a valve seat, a valve core and a retaining ring are sequentially arranged at intervals along the axial extension direction thereof, wherein the valve seat, the retaining ring and the valve body tube are fixedly connected, the valve seat has a flow hole that passes through along the axial direction, the valve core can be slidably assembled in the valve body tube along the axial direction to have a forward connecting position that conducts the flow hole and a reverse cut-off position that cuts off the flow hole, and also comprises a stamped stopper, the stopper has an axial stopper rod and a retaining rod perpendicular to the stopper rod, the first end of the stopper rod is fixedly connected to the retaining ring, the second end of the stopper rod extends along the axial direction and passes through the axial flow gap of the valve core.

[0005] Furthermore, the anti-rotation member is H-shaped, the anti-rotation rod is a vertical line of the H shape, and the blocking rod is a horizontal line of the H shape.

[0006] Furthermore, the anti-rotation member is a stamped part made of aluminum plate.

[0007] Furthermore, the first end of the anti-rotation rod passes through the inner side of the retaining ring and is welded or riveted to the retaining ring.

[0008] Furthermore, the blocking rod is located in the middle section of the anti-rotation rod.

[0009] Furthermore, the contact surface between the blocking rod and the valve core is a plane, and the contact surface between the valve core and the blocking rod is also a plane.

[0010] Furthermore, the first end of the anti-rotation rod has a step surface, and the step surface abuts against the end surface of the retaining ring for positioning.

[0011] Furthermore, the valve core has two, three or four side planes, and there is at least one corresponding stop rod, and the side surface of the stop rod facing the valve core is also a plane.

[0012] Furthermore, the valve core includes an arc surface, and the arc surface is slidably matched with the inner wall of the valve body tube.

[0013] Furthermore, it also includes a spring, which is located between the valve core and the blocking rod, and when the valve core is in the reverse cut-off position, the spring is in a free state.

[0014] The one-way valve of the utility model has a stopper formed by stamping, and the stopper has an axial stopper rod and a stopper rod perpendicular to the stopper rod, the first end of the stopper rod is fixedly connected to the stopper ring, and the second end of the stopper rod extends along the axial direction and passes through the axial flow clearance of the valve core. The stopper can achieve higher precision than wire bending through stamping, so that the connection reliability between the two can be effectively guaranteed. In addition, the stopper rod is located between the valve core and the stopper ring to prevent the valve core from abutting against the annular stopper ring to block the axial flow clearance and cause excessive refrigerant flow resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of a one-way valve according to an embodiment of the utility model.

[0016] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the assembly status of the stop rotating part and the retaining ring.

[0017] Figure 3 yes Figure 1 Schematic diagram of the assembled state of the stop rotating part and the retaining ring.

[0018] Figure 4 yes Figure 1 Axial schematic diagram of the plane structure of the middle valve core.

[0019] Figure 5 yes Figure 1 Schematic diagram of the cross-section of the matching structure of the middle valve core and valve body tube.

[0020] Figure 6 It is a cross-sectional view of a one-way valve according to another embodiment of the utility model.

[0021] In the figure:

[0022] 1. Valve body tube; 21. Valve seat; 211. Flow hole; 22. Valve core; 220. Axial flow clearance; 221. Blind hole; 222. Arc surface; 23. Retaining ring; 3. Stop member; 31. Stop rod; 32. Retaining rod; 4. Spring. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings represent the same or similar structures, and thus their detailed description will be omitted.

[0024] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be used. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present invention.

[0025] The embodiments described in the following examples are only some embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. All other embodiments obtained by ordinary technicians in this field without creative work should be included in the protection scope of the present utility model.

[0026] Please refer to Figures 1 to 5According to an embodiment of the utility model, a one-way valve is provided, comprising: a valve body tube 1, on which a valve seat 21, a valve core 22 and a retaining ring 23 are sequentially arranged at intervals along the axial extension direction thereof, wherein the valve seat 21 and the retaining ring 23 are fixedly connected to the valve body tube 1 (specifically, for example, the two are riveted together as one body through the valve body tube), and the valve seat 21 has a flow hole 211 that passes through along the axial direction. It can be understood that the retaining ring 23 has a central through hole as a flow hole, and the valve core 22 can be slidably assembled in the valve body tube 1 along the axial direction to have a forward connection position that conducts the flow hole 211 and a reverse cut-off position that cuts off the flow hole 211. Specifically, the refrigerant pressure difference on both sides of the valve core 22 can drive it to slide and switch between the aforementioned forward connection position and reverse cut-off position. The one-way valve also includes a stopper 3 formed by stamping an aluminum plate. The stopper has an axial stopper rod and a stopper rod perpendicular to the stopper rod. The stopper rod is located in the middle section of the stopper rod. The stopper 3 is H-shaped. The stopper rod 31 is the vertical line of the H shape. The stopper rod 32 is the horizontal line of the H shape. The first end of the stopper rod has a step surface, which is abutted against the end face of the stopper ring for positioning. The first end of the stopper rod passes through the inner side of the stopper ring and is welded or riveted to the stopper ring. The second end of the stopper rod extends along the axial direction and passes through the axial flow gap 220 of the valve core, so as to limit the circumferential rotation of the valve core 22. The abutting surface of the stopper rod 32 and the valve core is a plane, and the abutting surface of the valve core and the stopper rod is also a plane. When the valve core abuts against the stopper rod, the contact area is relatively large, the friction of the valve core increases and it is not easy to rotate, thereby reducing noise.

[0027] The cross section of the valve core 22 is a square, and the axial flow clearance 220 is the clearance between the side plane and the inner wall of the valve body tube 1. There are two corresponding stop rods 31, and the side of the stop rod 31 facing the valve core 22 is also a plane, and the side plane of the valve core 22 slides with the side plane of the stop rod 31. In some embodiments, the valve core 22 may have two or three side planes, and the corresponding stop rod 31 may be one. The size of the gap between the side plane of the valve core 22 and the side plane of the stop rod 31 directly determines the angle at which the valve core can rotate. The smaller the gap, the smaller the angle at which the valve core can rotate. A reasonable gap can be set according to system requirements. Compared with the valve core with three wing plates evenly spaced around the axis of the valve body tube, although the flow resistance of this solution is larger, the angle at which the valve core can rotate is small and the noise is very small. In some embodiments, the valve core 22 includes an arc surface 222, and the arc surface 222 slides with the inner wall of the valve body tube 1.

[0028] See Figure 1As shown, there is a first axial spacing between the second end of the stop rod 31 and the valve seat 21, and a second axial spacing between the first end of the stop rod 31 and the free end face of the retaining ring. The first axial spacing is smaller than the second axial spacing, and even the first axial spacing is equal to zero, that is, it is pressed. When the connection between the first end of the stop rod 31 and the retaining ring is loosened, due to the limitation of the aforementioned axial spacing, the valve seat 21 will limit the axial displacement of the stop member 3, thereby preventing the stop member 3 from falling off completely, thereby ensuring its anti-rotation effect.

[0029] In another one-way valve embodiment, see Figure 6 As shown, it also includes a spring 4, which is located between the valve core 22 and the blocking rod 32, and of course also in the valve body tube 1, and when the valve core 22 is in the reverse cut-off position, the spring 4 is in a free state, that is, when the valve core 22 is in the reverse cut-off position, the spring 4 is in a non-compressed state.

[0030] In this technical solution, an elastic spring 4 is arranged between the stop rod 32 and the valve core 22. When the valve core 22 is turned on and off under the action of a low pressure difference at its two ends, the displacement of the end of the valve core 22 away from the valve port 211 will be limited by the spring 4. On the one hand, the elastic force of the spring 4 can be used to reduce the axial displacement of the valve core 22, thereby reducing the friction noise between the valve core 22 and the contact parts on its moving path. On the other hand, the elastic action of the spring 4 can be used to buffer the axial movement of the valve core 22, and also reduce the abnormal noise generated by the movement of the valve core 22 under low pressure difference conditions.

[0031] Among them, the mass of the spring 4 is not greater than 4 times the mass of the valve core 22, so that the noise reduction effect of the spring 4 can be achieved while ensuring the smooth switching of the position of the valve core 22; in another preferred embodiment, when the spring 4 is in the free state, the axial clearance between the valve core 22 and the valve port 211 is not greater than 1 mm, that is, when the valve core 22 moves more than 1 mm away from the valve port 211, the valve core 22 will contact the spring 4 and compress the spring 4. Such a setting can, on the one hand, enable the valve core 22 to move within a smaller range, and on the other hand, ensure the smooth opening of the valve core 22 under low pressure difference conditions.

[0032] A blind hole 221 is formed on the end surface of the valve core 22 away from the valve seat 21, and the first end of the spring 3 is located in the blind hole 221, so that the spring 4 can guide the movement of the valve core 22 to ensure smooth and stable position switching of the valve core 22.

[0033] The diameter of the spring 4 increases gradually from the first end to the second end of the spring 4, that is, the spring 4 is a variable diameter spring. At this time, the first end can be called the small diameter end and the second end can be called the large diameter end. In this technical solution, the second end corresponding to the baffle rod 32 is designed with a larger diameter. The baffle rod 32 supports the spring 4, so that the state of the spring 4 when compressed is more stable.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A one-way valve, comprising: A valve body tube (1) is provided with a valve seat (21), a valve core (22) and a retaining ring (23) in sequence and at intervals along its axial extension direction, wherein the valve seat (21), the retaining ring (23) and the valve body tube (1) are fixedly connected, the valve seat (21) has a flow hole (211) penetrating along the axial direction, and the valve core (22) can be slidably assembled in the valve body tube (1) along the axial direction to have a positive connection through the flow hole (211). The invention relates to a valve body for preventing a flow hole (211) from being cut off and forcing the flow hole (211) to be cut off at a reverse cut-off position, characterized in that it also includes a stamped stopper (3), wherein the stopper (3) has an axial stopper rod (31) and a retaining rod (32) perpendicular to the stopper rod (31), wherein the first end of the stopper rod (31) is fixedly connected to the retaining ring (23), and the second end of the stopper rod (31) extends along the axial direction and passes through the axial flow gap (220) of the valve core (22).

2. The one-way valve according to claim 1, characterized in that: The anti-rotation member (3) is H-shaped, the anti-rotation rod (31) is a vertical line of the H shape, and the blocking rod (32) is a horizontal line of the H shape.

3. The one-way valve according to claim 1, characterized in that: The anti-rotation component (3) is a stamped aluminum plate component.

4. The one-way valve according to claim 1, characterized in that: The first end of the anti-rotation rod (31) passes through the inner side of the retaining ring (23) and is welded or riveted to the retaining ring (23).

5. The one-way valve according to claim 1, characterized in that: The blocking rod (32) is located in the middle section of the anti-rotation rod (31).

6. The one-way valve according to claim 1, characterized in that: The abutting surface of the blocking rod (32) and the valve core (22) is a plane, and the abutting surface of the valve core (22) and the blocking rod (32) is also a plane.

7. The one-way valve according to claim 1 or 4, characterized in that: The first end of the anti-rotation rod (31) has a step surface, and the step surface abuts against the end surface of the retaining ring (23) for positioning.

8. The one-way valve according to claim 1, characterized in that: The valve core (22) has two, three or four side planes, and there is at least one corresponding stop rod (31), and the side surface of the stop rod (31) facing the valve core (22) is also a plane.

9. The one-way valve according to claim 8, characterized in that: The valve core (22) comprises an arc surface (222), and the arc surface (222) is slidably matched with the inner wall of the valve body tube (1).

10. The one-way valve according to claim 1, characterized in that: It also includes a spring (4), wherein the spring (4) is located between the valve core (22) and the blocking rod (32), and when the valve core (22) is in the reverse cut-off position, the spring (4) is in a free state.

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