A buffer device and valve

Abstract

This application relates to a buffer device, comprising: a fixing member having a fixing hole inside; a guide sleeve installed in the fixing hole of the fixing member, with a gap formed between the end of the guide sleeve and the inner end wall of the fixing member; and a spring partially sleeved inside the guide sleeve, one end of the spring having a limiting portion extending radially outward, the limiting portion being placed within the gap formed between the guide sleeve and the fixing member. This utility model utilizes the radially outward-extending limiting portion at the end of the spring to firmly fix one end of the spring between the guide sleeve and the fixing member, allowing for simultaneous assembly of the spring and the guide sleeve. This provides advantages such as simple assembly, low operational difficulty, and secure spring installation. Furthermore, since a portion of the spring is directly disposed inside the guide sleeve, using the guide sleeve to support the spring prevents center offset during operation, thus extending the spring's service life.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a buffer device and valve. Background Technology

[0002] In air conditioning systems, it is often necessary to ensure that refrigerant or air flows only in a designated direction to prevent backflow from affecting system operation. To address this, a unidirectional flow element is typically used. Its main function is to achieve unidirectional conduction in the refrigeration cycle or airflow path. When the refrigerant or air pressure reaches the opening condition, the element opens the passage under the action of fluid pressure, allowing the medium to pass smoothly. When the fluid shows a tendency to flow in the opposite direction, the element automatically closes under the action of reverse pressure, thus blocking backflow. Because this structure is easy to install and reliable in operation, effectively ensuring the circulation stability and energy efficiency of the air conditioning system, it is widely used in flow path control of air conditioning systems.

[0003] However, existing valves still have certain shortcomings in practical use. Because the valve core needs to move repeatedly during opening and closing, its moving end face inevitably comes into direct contact and impact with the valve sleeve. This impact generates significant noise, affecting the operating environment of the equipment; furthermore, long-term impact can easily lead to wear or damage to components such as the valve core and valve sleeve, thus shortening the service life of the check valve and reducing the reliability of the system. While existing technologies include solutions that use springs inside the valve for cushioning, the current spring installation structure is relatively complex, with high processing and assembly costs. Furthermore, during long-term use, the springs are prone to loosening and center misalignment, leading to a decrease or even failure of the cushioning effect. Utility Model Content

[0004] In order to solve the problems mentioned in the background art, such as noise during operation, easy damage to parts, and complex spring installation structure of existing valves, this application provides a buffer device and a valve.

[0005] The buffer device and valve provided in this application adopt the following technical solution:

[0006] A buffer device, comprising:

[0007] The fastener has a fixing hole inside;

[0008] A guide sleeve is installed in the fixing hole of the fixing member, and a gap is formed between the end of the guide sleeve and the inner end wall of the fixing member;

[0009] A spring, partially fitted inside a guide sleeve, has a limiting portion extending radially outward at one end. The limiting portion is positioned within the gap formed between the guide sleeve and the fixing member, so that the end of the spring near the limiting portion remains fixed relative to the fixing member.

[0010] By adopting the above technical solution, the limiting part extending radially outward from the end of the spring can firmly fix one end of the spring between the guide sleeve and the fixing part. This allows the spring to be assembled simultaneously with the guide sleeve and the fixing part. It has the advantages of simple assembly, low operation difficulty, and firm spring installation. Furthermore, since part of the spring is directly set inside the guide sleeve, the spring can be supported by the guide sleeve, which can prevent the spring from shifting its center during operation and help extend the service life of the spring.

[0011] Optionally, it also includes a valve sleeve, wherein the fixing member is connected to the end position of the valve sleeve and extends outward along the axial direction of the valve sleeve, or the fixing member is disposed in the inner cavity of the valve sleeve and fixedly connected to the valve sleeve.

[0012] By adopting the above technical solution and setting the fixing parts at different positions on the valve sleeve, the appropriate type of valve structure can be selected according to the requirements.

[0013] Optionally, the fastener is formed at the center of the valve sleeve, and the center of the fastener has a through hole.

[0014] By adopting the above technical solution, the subsequent valve core and guide shaft can also be located in the center of the valve sleeve, which facilitates the uniform flow of fluid in all directions inside the valve during valve operation, resulting in better flow effect; at the same time, the through hole is set to prevent excessive pressure in local areas inside the guide sleeve and the formation of resistance effect when the guide shaft slides inside the guide sleeve.

[0015] Optionally, it also includes a guide shaft slidably connected inside the guide sleeve, with a valve core connected to the end of the guide shaft. When the valve core moves under force, it can contact the spring, thereby helping the spring to reduce the movement speed of the valve core and prevent the valve core from violently impacting the valve sleeve.

[0016] By adopting the above technical solution, the spring acts as a buffer when the valve core moves with the guide shaft. This is mainly to avoid the valve core from colliding with the end of the valve sleeve due to excessive speed at the moment of valve opening. This can reduce noise and prevent damage to components due to impact.

[0017] This application also provides a valve applied to the above-mentioned buffer device, which further includes a valve body and a valve seat. The valve body is fixed to the outside of the valve sleeve, the valve seat is fixed to the inside of the valve sleeve, and the valve seat has a valve port formed in its inner cavity.

[0018] The valve body has a constricted opening that gradually narrows towards the center in the circumferential direction. The end of the valve sleeve abuts against the inner wall of the constricted opening to achieve axial positioning of the valve sleeve.

[0019] By adopting the above technical solution, placing the buffer device inside the check valve can reduce noise and prevent damage to components during operation. The constriction section in the circumferential direction of the valve body can optimize the fluid flow path and accelerate the flow rate. On the other hand, when assembling the valve sleeve and the valve body, after the valve sleeve is inserted into the valve body, the inner wall of the constriction section can directly contact the end of the valve sleeve, thereby installing the valve sleeve in place and improving the convenience of assembly.

[0020] Optionally, the valve sleeve has a stepped portion formed inside, and the end of the valve seat abuts against the end face of the stepped portion to axially limit the valve seat.

[0021] By adopting the above technical solution, when the valve seat is installed into the valve sleeve, the end of the valve seat can abut against the end face of the stepped part of the valve sleeve under the action of gravity, thereby forming a limiting effect on the valve seat and also improving the convenience of assembly.

[0022] Optionally, an annular groove is formed on the outer wall of the end of the valve seat.

[0023] The main purpose of adopting the above technical solution is to facilitate the installation of welding rings, welding paste and other solders in the annular groove. When the solder melts, the valve seat, valve sleeve and valve body can be welded simultaneously, simplifying the assembly process and improving the strength of the weld.

[0024] Optionally, the valve sleeve has a liquid passage hole at its end, and the valve core has a balance hole in the circumferential direction.

[0025] The above technical solution is used to ensure that the fluid can flow normally.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] This invention utilizes a limiting part that extends radially outward from the end of the spring to firmly fix one end of the spring between the guide sleeve and the fixing component. This allows for the simultaneous assembly of the spring and the guide sleeve, resulting in easy assembly, simple operation, and secure spring installation. Furthermore, since a portion of the spring is directly located inside the guide sleeve, the guide sleeve supports the spring, preventing center offset during operation and extending the spring's service life.

[0028] The one-way valve of this invention has a limiting structure designed on both the valve body and the valve sleeve, which facilitates the rapid assembly of components and improves assembly efficiency. Attached Figure Description

[0029] Figure 1 This is a structural diagram of the buffer device of this utility model;

[0030] Figure 2 This is a utility model Figure 1 A magnified view of a portion of the view;

[0031] Figure 3 This is a structural diagram of the valve sleeve of this utility model;

[0032] Figure 4 This is a structural diagram of the installation of the guide sleeve and spring of this utility model;

[0033] Figure 5 This is a perspective view of the spring of this utility model;

[0034] Figure 6 This is a structural diagram of the one-way valve in Embodiment 1 of this utility model;

[0035] Figure 7 This is a structural diagram of the one-way valve in the open state in Embodiment 2 of this utility model;

[0036] Figure 8 This is a structural diagram of the one-way valve in the closed state in Embodiment 2 of this utility model;

[0037] Figure 9 This is a structural diagram of the one-way valve in Embodiment 3 of this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Valve sleeve; 101. Fixing element; 102. Through hole; 103. Stepped part; 104. Fluid passage hole; 2. Guide sleeve; 3. Spring; 301. Limiting part; 4. Guide shaft; 5. Valve core; 501. Balance hole; 6. Clearance; 7. Valve body; 701. Narrowing part; 8. Valve seat; 801. Annular groove; 802. Valve port. Detailed Implementation

[0040] The present application will be further described in detail below with reference to the accompanying drawings.

[0041] like Figure 1-5 As shown, this embodiment discloses a buffer device, including:

[0042] The fastener 101 has a fixing hole inside;

[0043] The guide sleeve 2 is installed in the fixing hole of the fixing member 101, and a gap 6 is formed between the end of the guide sleeve 2 and the inner end wall of the fixing member 101.

[0044] Spring 3 is partially fitted inside guide sleeve 2. One end of spring 3 has a limiting part 301 extending radially outward. The limiting part 301 is integrally formed at the end position of spring 3. The limiting part 301 is placed in the gap 6 formed between guide sleeve 2 and fixing member 101, so that the end of spring 3 near the limiting part 301 is fixed relative to fixing member 101. That is, the end of spring 3 with limiting part 301 is the fixed end and the end away from limiting part 301 is the movable end. The movable end is located inside guide sleeve 2, which can prevent the center offset problem during operation. In the specific assembly process, the spring 3 can be installed into the guide sleeve 2 first. Since the limiting part 301 extends radially outward, the limiting part 301 will be placed outside the guide sleeve 2. After the guide sleeve 2 is installed into the fixing hole of the fixing member 101 and fixed, the limiting part 301 of the spring 3 can be stably installed between the guide sleeve 2 and the fixing member 101, thereby reducing the process of installing and fixing the spring 3 separately, and improving the assembly efficiency.

[0045] Specifically, in this example, a valve sleeve 1 is also included. The fixing member 101 is connected to the end position of the valve sleeve 1 and extends outward along the axial direction of the valve sleeve 1. The fixing member 101 can be integrally formed with the valve sleeve 1. The fixing member 101 is formed at the center position of the valve sleeve 1, and the center of the fixing member 101 has a through hole 102. The inner diameter of the through hole 102 is smaller than the inner diameter of the fixing hole. This is mainly used to form a stepped structure at the end position of the fixing member 101, which, together with the guide sleeve 2, positions the limiting part 301. The fixing member 101 and the guide sleeve 2 can be connected and fixed by a tight fit, or by bolt connection, spinning fixation, etc., as long as the guide sleeve 2 is coaxially fixed in the fixing member 101. The fixing member 101 allows for a larger contact range between it and the guide sleeve 2, thereby ensuring the secure installation of the guide sleeve 2 and the valve sleeve 1. Furthermore, it is understood that in other embodiments, the fixing member 101 is disposed in the inner cavity of the valve sleeve 1 and is fixedly connected to the valve sleeve 1, that is, the fixing member 101 extends axially into the interior of the valve sleeve 1, or the fixing member 101 is a separate kit, which is circumferentially connected to the inner wall of the valve sleeve 1 by a bracket, which can also achieve the fixed connection between the fixing member 101 and the valve sleeve 1.

[0046] Specifically, it also includes a guide shaft 4 that is slidably connected inside the guide sleeve 2. A valve core 5 is connected to the end of the guide shaft 4. When the valve core 5 is subjected to force and moves, it can contact the spring 3, thereby helping the spring 3 to reduce the movement speed of the valve core 5 and prevent the valve core 5 from violently impacting the valve sleeve 1.

[0047] This application also provides a valve applied to the aforementioned buffer device. Specifically, in this embodiment one, as follows: Figure 6As shown, the valve also includes a valve body 7 and a valve seat 8. The valve body 7 is fixed to the outside of the valve sleeve 1, and the valve seat 8 is fixed to the inside of the valve sleeve 1. The valve seat 8 has a valve port 802 formed in its inner cavity. The valve sleeve 1 has three or more liquid passage holes 104 at its end, which are evenly distributed around the center of the valve sleeve 1. The valve core 5 has three or more balance holes 501 in its circumferential direction, which are evenly distributed around the center of the valve core 5. In this example, the valve core 5 has a cup-shaped structure, and its diameter gradually increases from the bottom of the cup to the opening. It is mainly used to cooperate with the valve port 802 to achieve the function of one-way check valve. When it is in contact with the valve port 802, the valve is in a closed state, and the medium inside the valve does not flow. When it is separated from the valve port 802, the fluid can open the valve core 5 through the valve port 802, thereby allowing flow. When the valve core 5 is opened, the valve core 5 moves a specified distance first, and then the guide shaft 4 contacts the spring 3 and compresses the spring 3, thereby reducing the speed of the valve core 5. On the one hand, this can play a buffering role to avoid the valve core 5 from directly colliding with the valve sleeve 1 and causing damage to the parts. On the other hand, it can also reduce noise and achieve a silent effect.

[0048] In this example, the valve body 7 has a constricted portion 701 that tapers towards the center in the circumferential direction. The end of the valve sleeve 1 abuts against the inner wall of the constricted portion 701 to achieve axial positioning of the valve sleeve 1. The constricted portion 701 has a conical structure, which not only provides axial positioning for the valve sleeve 1 during installation but also plays a certain role in centering, thus improving assembly accuracy. Furthermore, it is understood that in other embodiments, the constricted portion 701 can also be designed with a flat end face, that is, the inner wall of the constricted portion 701 has an end face perpendicular to the central axis of the valve body 7, which can also provide positioning for the valve sleeve 1.

[0049] In this example, an annular groove 801 is formed on the outer wall of the end of the valve seat 8. More specifically, the end face of the valve sleeve 1 and the inner wall of the end of the valve body 7 are both located in the area of ​​the annular groove 801. After installing a brazing ring, solder paste or other solder in the annular groove 801, the solder is melted by heating, so that the valve body 7, valve sleeve 1 and valve seat 8 can be welded and fixed at the same time, achieving the effect of one-time welding.

[0050] Example 2

[0051] like Figure 7-8 As shown, the only difference between this embodiment and the one-way valve in the first embodiment is that: in this example, the valve sleeve 1 is further formed with a stepped portion 103 inside, and the end of the valve seat 8 abuts against the end face of the stepped portion 103 to axially limit the valve seat 8. In this way, when the valve seat 8 is assembled with the valve sleeve 1, the stepped portion 103 can be used to axially limit the valve seat 8, so as to achieve the effect of rapid assembly.

[0052] Example 3

[0053] like Figure 9 As shown in this embodiment, neither the valve body 7 nor the valve sleeve 1 is provided with a limit structure, yet the assembly between components can still be achieved.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A buffer device, characterized in that, include: The fastener (101) has a fixing hole inside; A guide sleeve (2) is installed in the fixing hole of the fixing member (101), and a gap (6) is formed between the end of the guide sleeve (2) and the inner end wall of the fixing member (101); A spring (3) is partially fitted inside a guide sleeve (2). One end of the spring (3) has a limiting part (301) extending radially outward. The limiting part (301) is placed in the gap (6) formed between the guide sleeve (2) and the fixing member (101), so that the end of the spring (3) near the limiting part (301) remains fixed relative to the fixing member (101).

2. The buffer device according to claim 1, characterized in that, It also includes a valve sleeve (1), wherein the fixing member (101) is connected to the end position of the valve sleeve (1) and extends outward along the axial direction of the valve sleeve (1), or the fixing member (101) is disposed in the inner cavity of the valve sleeve (1) and fixedly connected to the valve sleeve (1).

3. A buffer device according to claim 2, characterized in that, The fixing member (101) is located at the center of the valve sleeve (1), and the center of the fixing member (101) has a through hole (102).

4. A buffer device according to claim 1, characterized in that, It also includes a guide shaft (4) that is slidably connected in the guide sleeve (2). The end of the guide shaft (4) is connected to a valve core (5). When the valve core (5) is subjected to force and moves, it can contact the spring (3), thereby helping the spring (3) to reduce the movement speed of the valve core (5) and prevent the valve core (5) from violently impacting the valve sleeve (1).

5. A valve applied to a buffer device as described in any one of claims 1-4, characterized in that, It also includes a valve body (7) and a valve seat (8), the valve body (7) being fixed to the outside of the valve sleeve (1), the valve seat (8) being fixed to the inside of the valve sleeve (1), and the valve seat (8) having a valve port (802) formed in its inner cavity.

6. A valve according to claim 5, characterized in that, The valve body (7) has a constricted opening (701) that gradually narrows towards the center in the circumferential direction. The end of the valve sleeve (1) abuts against the inner wall of the constricted opening (701) to achieve axial positioning of the valve sleeve (1).

7. A valve according to claim 5, characterized in that, The valve sleeve (1) has a stepped portion (103) formed inside, and the end of the valve seat (8) abuts against the end face of the stepped portion (103) for axial limiting of the valve seat (8).

8. A valve according to claim 5, characterized in that, The valve seat (8) has an annular groove (801) formed on the outer wall of its end.

9. A valve according to claim 5, characterized in that, The valve sleeve (1) has a liquid passage hole (104) at its end, and the valve core (5) has a balance hole (501) in the circumferential direction.

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