Elastic mounting structure and reverse cutting device

Abstract

The application relates to an elastic mounting structure and a reverse cutting device, which comprises a valve sleeve with an open structure at one end and an end wall at the other end; a spring arranged in the valve sleeve, the spring having a fixed end and a movable end, the fixed end being arranged on the side close to the end wall and being fixedly connected with the valve sleeve, and the movable end being close to the open structure side of the valve sleeve; and a guide sleeve fixedly connected with the valve sleeve; wherein the fixed end of the spring extends radially outward, the end wall of the valve sleeve is provided with a fixed foot, and the fixed foot can lock the fixed end of the spring after being bent and deformed, so as to realize the fixed connection of the spring and the valve sleeve; the fixed foot capable of being bent is used to press and fix the fixed end of the spring, the stable assembly of the spring can be ensured, the spring can reliably operate, the fixed foot can be reversely bent during subsequent maintenance, the spring can be disassembled, the repeated use of the spring is facilitated, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of fluid control technology, and in particular to a flexible mounting structure and a reverse cut-off device. Background Technology

[0002] Currently, in air conditioning refrigeration systems, in order to achieve directional flow of refrigerant fluid in the system pipeline, a reverse cut-off device with flow direction control function is usually installed in the pipeline. This device can open the passage when the medium flows in the forward direction and automatically close it when the fluid has a reverse flow tendency, thereby preventing refrigerant backflow inside the system and ensuring the normal operation of the compressor and system components.

[0003] Existing reverse shut-off devices generally consist of valve sleeve, valve core and valve seat. The valve core reciprocates under the action of fluid pressure to complete the opening and closing action.

[0004] However, in practical use, the traditional reverse shut-off device has certain shortcomings. Specifically, when the system starts up or the flow rate changes suddenly, the internal valve core will move instantaneously at a high speed under the impact of the fluid. Due to the lack of effective buffering and guiding restraint, the valve core is prone to colliding with the end of the valve sleeve when it reaches the limit position. This collision phenomenon not only generates a lot of noise, affecting the quiet operation performance of the equipment, but also frequent impacts can lead to mechanical damage or fatigue failure of internal components, shortening the service life of the device. Utility Model Content

[0005] In order to solve the problems of noise and component damage caused by excessive valve core movement speed in existing reverse shut-off devices mentioned in the background art, this application provides a flexible installation structure and a reverse shut-off device.

[0006] The flexible installation structure and reverse cutting device provided in this application adopt the following technical solution:

[0007] A flexible mounting structure, comprising:

[0008] The valve sleeve has an open structure at one end and an end wall at the other end;

[0009] A spring is disposed inside the valve sleeve. The spring has a fixed end and a movable end. The fixed end is disposed near the end wall and is fixedly connected to the valve sleeve. The movable end is near the open structure of the valve sleeve.

[0010] Guide sleeve, which is fixedly connected to valve sleeve;

[0011] The fixed end of the spring extends radially outward, and the end wall of the valve sleeve is provided with a fixing foot. After the fixing foot is bent and deformed, it can lock the fixed end of the spring to achieve a fixed connection between the spring and the valve sleeve.

[0012] The above technical solution can fix the spring inside the valve sleeve to achieve a tight assembly between the spring and the valve sleeve. Furthermore, during subsequent maintenance, the spring can be disassembled by bending the fixing foot in the reverse direction, which is beneficial for the reuse of the spring and reduces costs.

[0013] Optionally, a liquid passage hole is provided at the end wall of the valve sleeve so that the two ends of the valve sleeve form a through structure; the central axis of the spring coincides with the central axis of the valve sleeve.

[0014] Through the above technical solution, the fluid passage hole is used to ensure the normal flow of fluid. The spring is set on the center line of the valve sleeve, which can optimize the layout of the entire elastic mounting structure. After the spring is assembled, its own force can be uniform and stable, and during operation, the parts in contact with the spring can also have uniform force, which is beneficial to the reliability during operation.

[0015] Optionally, the guide sleeve is located at the center of the valve sleeve, and the spring portion is sleeved outside the guide sleeve to radially limit the spring through the guide sleeve. The movable end of the spring extends axially outward from the guide sleeve.

[0016] Through the above technical solution, the outer wall of the guide sleeve can contact the spring, thereby supporting the spring and avoiding the problem of axial displacement of the spring in the suspended state. This helps to maintain the reliability of the spring during operation. At the same time, the movable end of the spring extends to the outside of the guide sleeve. That is, in the natural state, the end of the spring extends to the outside of the guide sleeve and can contact the valve core, thereby compressing the spring and playing a buffering role.

[0017] Optionally, the guide sleeve and the valve sleeve are integrally formed.

[0018] The above technical solution allows the guide sleeve to be positioned at the center of the valve sleeve through an integral molding process, simplifying the overall structure of the valve sleeve and the guide sleeve.

[0019] Optionally, a positioning sleeve is connected to the end wall of the valve sleeve, the positioning sleeve extends axially outward from the valve sleeve, one end of the guide sleeve is fitted and fixed inside the positioning sleeve, and the other end of the guide sleeve extends into the valve sleeve and extends in the direction of the open structure.

[0020] The above technical solution designs the guide sleeve and valve sleeve as independent structures. The guide sleeve is fixed by a positioning sleeve, which can also be used to radially position the spring and serve as a guide for the movement of the valve core.

[0021] Optionally, the fixed end of the spring is a ring-shaped structure that extends radially outward and bends around the circumference of the spring. The fixed feet are evenly distributed around the circumference of the spring and are bent towards or away from the center of the spring to lock the ring-shaped structure at the fixed end.

[0022] Through the above technical solution, the fixed foot and the end wall of the valve sleeve can be integrally formed by stamping. When assembling the spring, the fixed foot can be bent to produce deformation, and the fixed end of the spring can be placed at the bent position of the fixed foot to press the fixed end of the spring, thereby fixing the spring. This structure can avoid the use of welding to fix the spring, which facilitates the subsequent disassembly of the spring and allows the spring to be reused.

[0023] Optionally, the fixed end of the spring is a rod-shaped structure extending radially therein, and the fixing foot is correspondingly set at the end wall of the valve sleeve, using the bent and deformed fixing foot to lock the fixed end of the spring.

[0024] The above technical solution differs from the method of forming a ring structure at the fixed end. It only uses a radially extending rod structure, which can be locked by a fixing foot, making the structure simpler.

[0025] Optionally, the fixing foot is located near the center of the valve sleeve or near the inner circumference of the valve sleeve.

[0026] The above technical solution allows for the design of the relative positions of the fixing feet based on the dimensions of different fixing ends of the spring, thus meeting the molding requirements of different sizes and expanding the scope of application.

[0027] Optionally, the movable end of the spring has a tapered structure, and its diameter gradually increases from the direction near the end wall to the direction away from the end wall.

[0028] The above technical solution can form a flared trumpet-shaped structure at the movable end of the spring. This is because the movable end is located outside the guide sleeve in its natural state. To avoid axial displacement, it is designed as a tapered structure.

[0029] This application also provides a reverse cutoff device, including the aforementioned flexible mounting structure, and optionally, further comprising:

[0030] A guide shaft, which slides with a guide sleeve, is configured to allow the guide shaft to move along the axial direction of the guide sleeve;

[0031] The valve core is fixedly connected to the guide shaft and can abut against the movable end of the spring;

[0032] The valve seat is fixedly connected to the valve sleeve, and its inner cavity is provided with a valve port that mates with the valve core.

[0033] The valve body is fixedly connected to the valve sleeve.

[0034] By adopting the above technical solution, the entire reverse shut-off device can be formed. The reverse shut-off device has the function of opening the passage when the medium flows in the forward direction and automatically closing it when the fluid has a reverse flow tendency. With the flexible installation structure, it can prevent the noise problem caused by the impact of the internal valve core during operation, and also avoid damage to the parts due to impact, thus extending the service life of the entire device.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] This invention uses a bendable fixing foot to press and fix the fixed end of the spring, which not only ensures the stable assembly of the spring and its reliable operation, but also allows the fixing foot to be bent in the opposite direction during subsequent maintenance to disassemble the spring, so as to facilitate the reuse of the spring and reduce costs.

[0037] The reverse cut-off device of this utility model is equipped with a spring structure inside, which allows the valve core to open and move a certain distance before contacting the spring. The spring is used to reduce the movement speed of the valve core, avoiding the problem of the valve core violently impacting the valve sleeve and causing a lot of noise. It also avoids the problem of damage to parts caused by impact. Attached Figure Description

[0038] Figure 1 This is a three-dimensional representation of Embodiment 1 of the present invention, where a positioning sleeve is provided at the end of the valve sleeve. Figure 1 ;

[0039] Figure 2 This is a three-dimensional representation of Embodiment 1 of the present invention, where a positioning sleeve is provided at the end of the valve sleeve. Figure 2 ;

[0040] Figure 3 This is a cross-sectional view of Embodiment 1 when a positioning sleeve is provided at the end of the valve sleeve of this utility model;

[0041] Figure 4 This is a perspective view of the spring in Embodiment 1 when a positioning sleeve is provided at the end of the valve sleeve of this utility model;

[0042] Figure 5 This is a cross-sectional view of Embodiment 2 when a positioning sleeve is provided at the end of the valve sleeve of this utility model;

[0043] Figure 6 This is a cross-sectional view of Embodiment 3 when a positioning sleeve is provided at the end of the valve sleeve of this utility model;

[0044] Figure 7 This is a cross-sectional view of Embodiment 4 of the present invention, in which a positioning sleeve is provided at the end of the valve sleeve.

[0045] Figure 8 This is a cross-sectional view of Embodiment 5 of the present invention, in which a positioning sleeve is provided at the end of the valve sleeve;

[0046] Figure 9 This is a perspective view of Embodiment 5 when a positioning sleeve is provided at the end of the valve sleeve of this utility model;

[0047] Figure 10 This is a perspective view of the spring in Embodiment 5 when a positioning sleeve is provided at the end of the valve sleeve of this utility model;

[0048] Figure 11 This is a perspective view of Embodiment Six when a positioning sleeve is provided at the end of the valve sleeve of this utility model;

[0049] Figure 12 This is a cross-sectional view of an embodiment of the present invention, showing the guide sleeve and valve sleeve integrally formed.

[0050] Figure 13 This is a cross-sectional view of Embodiment 2 of the present invention, showing the guide sleeve and valve sleeve integrally formed.

[0051] Figure 14 This is a cross-sectional view of Embodiment 3 of the present invention, showing the guide sleeve and valve sleeve integrally formed.

[0052] Figure 15 This is a cross-sectional view of Embodiment 4 of the present invention, showing the guide sleeve and valve sleeve integrally formed.

[0053] Figure 16 This is a cross-sectional view of Embodiment 5 of the present invention, showing the guide sleeve and valve sleeve integrally formed.

[0054] Figure 17 This is a schematic diagram of an embodiment of the present invention in which the guide sleeve and the spring are respectively located on both sides of the valve sleeve end wall;

[0055] Figure 18 This is a structural diagram of one embodiment of the reverse cutting device of this utility model;

[0056] Figure 19 This is a structural diagram of Embodiment 2 of the reverse cutting device of this utility model;

[0057] Figure 20 This is a structural diagram of Embodiment 3 of the reverse cutting device of this utility model.

[0058] Explanation of reference numerals in the attached figures:

[0059] 1. Valve sleeve; 101. End wall; 102. Fixing foot; 103. Positioning sleeve; 104. Fluid passage hole;

[0060] 2. Spring; 201. Fixed end; 202. Movable end;

[0061] 3. Guide sleeve;

[0062] 4. Guide shaft;

[0063] 5. Valve core;

[0064] 6. Valve seat; 601. Valve port;

[0065] 7. Valve body. Detailed Implementation

[0066] The present application will be further described in detail below with reference to the accompanying drawings.

[0067] like Figure 1-4 As shown, this embodiment discloses a flexible installation structure, including:

[0068] The valve sleeve 1 has an open structure at one end and an end wall 101 at the other end. A liquid passage hole 104 is provided at the end wall 101 of the valve sleeve 1 so that the two ends of the valve sleeve 1 form a through structure. The liquid passage holes 104 are evenly distributed around the center of the valve sleeve 1. In this example, there are three liquid passage holes 104 and each liquid passage hole 104 is fan-shaped. It is understood that in other embodiments, the number and shape of the liquid passage holes 104 can be designed to be different.

[0069] Spring 2 is disposed inside valve sleeve 1, and the central axis of spring 2 coincides with the central axis of valve sleeve 1. Spring 2 has a fixed end 201 and a movable end 202. The fixed end 201 is disposed near the end wall 101 and is fixedly connected to valve sleeve 1. The movable end 202 is near the open structure side of valve sleeve 1.

[0070] Guide sleeve 3 is fixedly connected to valve sleeve 1;

[0071] The fixed end 201 of the spring 2 extends radially outward, and the end wall 101 of the valve sleeve 1 is provided with a fixed foot 102. After bending and deformation, the fixed foot 102 can lock the fixed end 201 of the spring 2 to achieve a fixed connection between the spring 2 and the valve sleeve 1.

[0072] In some embodiments, such as Figure 1-16 As shown, the guide sleeve 3 is located at the center of the valve sleeve 1, and the spring 2 is partially sleeved outside the guide sleeve 3 to radially limit the spring 2 through the guide sleeve 3. This prevents the spring 2 from radially deviating. The movable end 202 of the spring 2 extends axially outward from the guide sleeve 3 so that the spring 2 can be compressed after the valve core 5 contacts the spring 2.

[0073] In some embodiments, such as Figure 1-11As shown, a positioning sleeve 103 is connected to the end wall 101 of the valve sleeve 1. The positioning sleeve 103 extends axially outward from the valve sleeve 1. One end of the guide sleeve 3 is fitted and fixed inside the positioning sleeve 103, and the other end of the guide sleeve 3 extends into the valve sleeve 1 and extends in the direction of the open structure.

[0074] It is understood that in other embodiments, such as Figure 12-17 As shown, the guide sleeve 3 and the valve sleeve 1 are integrally formed.

[0075] In some embodiments, such as Figure 1-7 , Figure 11-15 , Figure 17 As shown, the fixed end 201 of the spring 2 is a ring structure that extends radially outward and bends around the circumference of the spring 2. The fixed feet 102 are evenly distributed in the circumference of the spring 2 and are bent and deformed towards or away from the center of the spring 2 to lock the ring structure of the fixed end 201.

[0076] More specifically, such as Figure 1-4 , Figure 6 , Figure 11-12 , Figure 14 and Figure 17 As shown, in these embodiments, the fixing foot 102 is bent toward the center of the spring 2, thereby pressing and fixing the annular structure fixing end 201 of the spring 2. The main difference between them is that the position distance of the fixing foot 102 relative to the center line of the spring 2 is different in different figures. Some fixing feet 102 are set near the center of the valve sleeve 1, and the rest of the fixing feet 102 are set near the inner circumference of the valve sleeve 1.

[0077] In some embodiments, such as Figure 8-10 as well as Figure 16 As shown, the fixed end 201 of the spring 2 is a rod-shaped structure extending radially therefrom. The fixing feet 102 are correspondingly disposed at the end wall 101 of the valve sleeve 1. The fixed end 201 of the spring 2 is locked by the bending and deforming fixing feet 102. In these embodiments, the fixing feet 102 are staggered on both sides of the fixed end 201 of the rod-shaped structure, so as to press the fixed end 201 in an alternating manner, resulting in a better positioning effect.

[0078] In some embodiments, such as Figure 11 As shown, the movable end 202 of the spring 2 has a tapered structure, and its diameter gradually increases from the direction near the end wall 101 to the direction away from the end wall 101. That is, the movable end 202 of the spring 2 has a flared trumpet-shaped structure, which is mainly used to prevent the movable end 202 from radially deflecting due to being in a suspended state.

[0079] A reverse cut-off device, comprising the resilient mounting structure of any of the above embodiments, further comprising:

[0080] The guide shaft 4 is slidably fitted with the guide sleeve 3 and is configured to allow the guide shaft 4 to move along the axial direction of the guide sleeve 3;

[0081] The valve core 5 is fixedly connected to the guide shaft 4 and can abut against the movable end 202 of the spring 2; the valve core 5 is fixedly connected to the guide shaft 4, and the assembly structure of the guide shaft 4 and the guide sleeve 3 allows the valve core 5 to move along the axial direction of the guide shaft 4 to maintain the centering performance.

[0082] The valve seat 6 is fixedly connected to the valve sleeve 1, and its inner cavity is provided with a valve port 601 that cooperates with the valve core 5;

[0083] The valve body 7 is fixedly connected to the valve sleeve 1. The valve sleeve 1, valve seat 6, and valve body 7 are fixed to each other by welding.

[0084] More specifically, in one embodiment, such as Figure 18 As shown, this reverse cut-off device is mainly used in applications such as Figure 1-4 The elastic mounting structure shown allows fluid to flow from left to right during operation. After the valve core 5 is opened by the fluid, it can move a certain distance before contacting the movable end 202 of the spring 2. The spring 2 is used to reduce the movement speed of the valve core 5, which reduces noise caused by impact and prevents damage to components caused by severe impact.

[0085] In another embodiment, such as Figure 19 As shown, this reverse cut-off device is mainly used in applications such as Figure 11 The flexible mounting structure shown.

[0086] In another embodiment, such as Figure 20 As shown, this reverse cut-off device is mainly used in applications such as Figure 17 In the elastic mounting structure shown, in this embodiment, the guide sleeve 3 and the valve sleeve 1 are integrally formed, and the guide sleeve 3 extends to the outer position of the valve sleeve 1, and the guide shaft 4 slides with the guide sleeve 3.

[0087] 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 flexible installation structure, characterized in that, include: The valve sleeve (1) has an open structure at one end and an end wall (101) at the other end; A spring (2) is disposed inside a valve sleeve (1). The spring (2) has a fixed end (201) and a movable end (202). The fixed end (201) is disposed near the end wall (101) and is fixedly connected to the valve sleeve (1). The movable end (202) is near the open structure of the valve sleeve (1). Guide sleeve (3), which is fixedly connected to valve sleeve (1); The fixed end (201) of the spring (2) extends radially outward, and the end wall (101) of the valve sleeve (1) is provided with a fixed foot (102). After bending and deformation, the fixed foot (102) can lock the fixed end (201) of the spring (2) to achieve a fixed connection between the spring (2) and the valve sleeve (1).

2. The flexible installation structure according to claim 1, characterized in that, The valve sleeve (1) has a liquid passage hole (104) at the end wall (101) so that the two ends of the valve sleeve (1) form a through structure; the central axis of the spring (2) coincides with the central axis of the valve sleeve (1).

3. The flexible installation structure according to claim 1, characterized in that, The guide sleeve (3) is located at the center of the valve sleeve (1), and the spring (2) is partially sleeved on the outside of the guide sleeve (3) to radially limit the spring (2) through the guide sleeve (3). The movable end (202) of the spring (2) extends axially to the outside of the guide sleeve (3).

4. The flexible installation structure according to claim 3, characterized in that, The guide sleeve (3) and the valve sleeve (1) are integrally formed.

5. The flexible installation structure according to claim 3, characterized in that, A positioning sleeve (103) is connected to the end wall (101) of the valve sleeve (1). The positioning sleeve (103) extends axially outward from the valve sleeve (1). One end of the guide sleeve (3) is fitted and fixed inside the positioning sleeve (103), and the other end of the guide sleeve (3) extends into the valve sleeve (1) and towards the open structure.

6. The flexible installation structure according to claim 1, characterized in that, The fixed end (201) of the spring (2) is a ring structure that extends radially outward and bends around the circumference of the spring (2). The fixed feet (102) are evenly distributed in the circumference of the spring (2) and are bent towards the center of the spring (2) or away from the center of the spring (2) to lock the ring structure of the fixed end (201).

7. The flexible installation structure according to claim 1, characterized in that, The fixed end (201) of the spring (2) is a rod-shaped structure extending in the radial direction. The fixed foot (102) is correspondingly set at the end wall (101) of the valve sleeve (1). The fixed end (201) of the spring (2) is locked by the bent and deformed fixed foot (102).

8. The flexible installation structure according to claim 1, characterized in that, The fixing foot (102) is located near the center of the valve sleeve (1) or near the inner circumference of the valve sleeve (1).

9. The flexible installation structure according to claim 1, characterized in that, The movable end (202) of the spring (2) has a tapered structure, and its diameter gradually increases from the direction near the end wall (101) to the direction away from the end wall (101).

10. A reverse cutting-off device, comprising the elastic mounting structure as described in any one of claims 1-9, characterized in that, Also includes: The guide shaft (4) is slidably fitted with the guide sleeve (3) and configured to allow the guide shaft (4) to move along the axial direction of the guide sleeve (3); The valve core (5) is fixedly connected to the guide shaft (4) and can abut against the movable end (202) of the spring (2); The valve seat (6) is fixedly connected to the valve sleeve (1), and the inner cavity is provided with a valve port (601) that cooperates with the valve core (5); The valve body (7) is fixedly connected to the valve sleeve (1).

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