Four-way reversing valve sleeve connecting structure

Abstract

The utility model relates to the technical field of sleeve connection, in particular to a sleeve connection structure of a four-way reversing valve, which comprises a four-way reversing valve body and four pipelines mounted in the four-way reversing valve body, and further comprises an inner-layer sleeve, a flange plate is mounted at each pipe orifice, a through groove is formed in the connecting end face of each flange plate, and a through hole is formed in the inner-layer sleeve. A through groove is formed in the connecting end face of the flange plate, an internal thread is formed in the through groove, a groove is further formed in the connecting end face of the flange plate, a sealing ring is installed in the groove, a fastening structure matched with the inner-layer sleeve is arranged on a pipe opening of the flange plate, the outer wall of the inner-layer sleeve is sleeved with an outer-layer protective sleeve, and a connecting structure matched with the flange plate is installed on the pipe opening of the inner-layer sleeve. The inner-layer sleeve is connected with a pipeline of the four-way reversing valve body through a connecting structure; by adopting the hose structure and combining the inclined block fastening structure and the convex ring connecting structure, the detachable connection with the pipeline of the four-way reversing valve body is realized, the stability and the sealing property of the connection are enhanced, and the leakage of a refrigerant is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of sleeve connection, in particular to a sleeve connection structure of a four-way reversing valve. Background Art

[0002] In refrigeration equipment, the four-way reversing valve is indeed a key component for controlling the flow of refrigerant. By changing the flow direction of the refrigerant, it enables the equipment to switch between cooling and heating modes. Precise control of the four-way reversing valve is crucial to ensuring the performance and efficiency of the refrigeration equipment. It is the core device for achieving the versatility and efficient operation of the equipment.

[0003] However, the traditional four-way reversing valve sleeve connection structure usually adopts a method of directly connecting a rigid sleeve and a flange. However, this connection method has many shortcomings. First, the rigid sleeve is difficult to be flexibly arranged in a complex or curved piping system, which brings inconvenience to installation and maintenance. Second, the connection between the rigid sleeve and the flange cannot be tightly fitted, which reduces the sealing effect and makes it easy for refrigerant leakage to occur.

[0004] Therefore, in view of the fact that the above-mentioned traditional four-way reversing valve sleeve adopts the method of directly connecting the rigid sleeve and the flange, which results in the inability to achieve tight fit at the connection between the rigid sleeve and the flange, thereby reducing the sealing effect, a four-way reversing valve sleeve connection structure can be designed. By adopting a hose structure of an inner sleeve and an outer protective sleeve, combined with a bevel block fastening structure and a convex ring connection structure, not only a detachable connection with the four-way reversing valve body pipeline is achieved, but also the stability and sealing of the connection are significantly enhanced, effectively preventing refrigerant leakage. Utility Model Content

[0005] In order to overcome the problem that the traditional four-way reversing valve sleeve adopts the method of directly connecting the rigid sleeve and the flange, the connection between the rigid sleeve and the flange cannot be tightly fitted, thereby reducing the sealing effect.

[0006] The technical solution of the utility model is: a four-way reversing valve sleeve connection structure, including a four-way reversing valve body and four pipes installed in the four-way reversing valve body, and also including an inner sleeve, each pipe mouth is installed with a flange, the connecting end face of the flange is provided with a through groove, the through groove is provided with an internal thread, the connecting end face of the flange is also provided with a groove, a sealing ring is installed in the groove, the pipe mouth of the flange is provided with a fastening structure adapted to the inner sleeve, the outer wall of the inner sleeve is sleeved with an outer protective sleeve, the pipe mouth of the inner sleeve is installed with a connecting structure adapted to the flange, and the inner sleeve is connected to the pipe of the four-way reversing valve body through the connecting structure.

[0007] Preferably, the fastening structure is an inclined block; an inclined block is installed around the pipe opening of the flange, the inclined surface of the inclined block faces the pipe opening of the flange, and the inner sleeve is inserted into the pipe opening of the flange through the inclined block.

[0008] Preferably, the connection structure includes a connecting plate and a convex ring; the connecting plate is fixedly connected to the pipe mouth of the inner sleeve, the surface of the connecting plate is fixedly connected to the convex ring, the outer wall of the convex ring is provided with an external thread that is compatible with the internal thread of the through groove, and the convex ring is threadedly connected to the through groove.

[0009] Preferably, an annular groove adapted to the sealing ring is provided between the pipe opening of the inner sleeve and the convex ring, and the sealing ring is snapped into the annular groove.

[0010] Preferably, the inner sleeve and the outer protective sleeve both adopt a hose structure, and lubricating oil is provided between the inner sleeve and the outer protective sleeve.

[0011] Preferably, the outer wall of the outer protective sleeve is provided with convex small particles.

[0012] Beneficial effects of the utility model:

[0013] 1. This four-way reversing valve casing connection structure adopts a flexible structure with an inner casing and an outer protective sleeve, combined with a bevel block fastening structure and a convex ring connection structure. This not only achieves a detachable connection with the four-way reversing valve body pipeline, but also significantly enhances the stability and sealing of the connection, effectively preventing refrigerant leakage. Compared with traditional casing connections, this solution is more flexible, easier to install and maintain, and ensures the convenience and stability of the casing connection.

[0014] 2. When the inner sleeve is inserted into the pipe mouth of the flange through the inclined block, the end of the inner sleeve will contact the inclined surface of the inclined block and will be gradually squeezed by the inclined block as the insertion depth increases. This squeezing effect not only firmly fixes the inner sleeve in the pipe mouth of the flange, but also generates additional fastening force through the inclined surface of the inclined block, thereby enhancing the stability and sealing of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a first three-dimensional structural schematic diagram of the four-way reversing valve sleeve connection structure of the present invention;

[0016] Figure 2 Shown is a second three-dimensional structural schematic diagram of the four-way reversing valve sleeve connection structure of the present invention;

[0017] Figure 3 Shown is a schematic diagram of the split three-dimensional structure of the sleeve connection structure of the four-way reversing valve of the present invention;

[0018] Figure 4 Shown is a three-dimensional structural diagram of the fastening structure of the sleeve connection structure of the four-way reversing valve of the present invention;

[0019] Figure 5 What is shown is a three-dimensional structural schematic diagram of the sleeve connection structure of the four-way reversing valve of the present invention.

[0020] Explanation of the accompanying symbols: 1. Four-way reversing valve body; 2. Pipe; 3. Inner sleeve; 4. Flange; 5. Through groove; 7. Groove; 8. Sealing ring; 9. Outer protective sleeve; 10. Bevel block; 11. Connecting plate; 12. Protruding ring; 13. Annular groove. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] See also Figure 1-Figure 5 The utility model provides an embodiment: a four-way reversing valve sleeve connection structure, comprising a four-way reversing valve body 1 and four pipes 2 installed in the four-way reversing valve body 1, further comprising an inner sleeve 3, each pipe mouth is installed with a flange 4, the connecting end surface of the flange 4 is provided with a through groove 5, the through groove 5 is provided with an internal thread, the connecting end surface of the flange 4 is also provided with a groove 7, a sealing ring 8 is installed in the groove 7, the pipe mouth of the flange 4 is provided with a fastening structure adapted to the inner sleeve 3, the outer wall of the inner sleeve 3 is sleeved with an outer protective sleeve 9, the pipe mouth of the inner sleeve 3 is installed with a connecting structure adapted to the flange 4, the inner sleeve 3 is connected to the pipe 2 of the four-way reversing valve body 1 through the connecting structure, the four-way reversing valve body 1 is the main structure of the four-way reversing valve, and four independent pipes 2 are provided inside it for realizing the reversing flow of refrigerant, the inner sleeve 3 is used to be inserted into the pipe 2 of the four-way reversing valve body 1 to realize the reversing flow of refrigerant When the flange 4 is in close contact with the inner sleeve 3, the sealing ring 8 will be perfectly inserted into the arc groove to form an effective sealing barrier to prevent refrigerant leakage. The fastening structure is used to fit the inner wall of the pipe orifice of the inner sleeve 3 only into the pipe orifice of the flange 4, thereby strengthening the connection effect and sealing effect between the inner sleeve 3 and the flange 4. The outer protective cover 9 is used to protect the inner sleeve 3 from erosion by the external environment. At the same time, the outer protective cover 9 also has a certain elasticity. The connecting structure can cooperate with the through groove 5 and the internal thread on the flange 4 to realize the detachable connection between the inner sleeve 3 and the pipeline 2 of the four-way reversing valve body 1.

[0023] See also Figure 4In this embodiment, the fastening structure is a bevel block 10; a bevel block 10 is installed around the pipe opening of the flange 4, and the bevel block 10 faces the pipe opening of the flange 4. The inner sleeve 3 is inserted into the pipe opening of the flange 4 through the bevel block 10. The bevel block 10 is made of high-strength and wear-resistant material. At the same time, the bevel block 10 also has the feature of the bevel facing the pipe opening of the flange 4. When the inner sleeve 3 is inserted into the pipe opening of the flange 4 through the bevel block 10, during the insertion process, the end of the inner sleeve 3 will contact the bevel of the bevel block 10, and as the insertion depth increases, it will gradually be squeezed by the bevel block 10. This squeezing effect not only firmly fixes the inner sleeve 3 in the pipe opening of the flange 4, but also generates additional fastening force through the bevel of the bevel block 10, thereby enhancing the stability and sealing of the connection.

[0024] See also Figure 5 In this embodiment, the connection structure includes a connecting plate 11 and a convex ring 12; the connecting plate 11 is fixedly connected to the pipe mouth of the inner sleeve 3, and the surface of the connecting plate 11 is fixedly connected to the convex ring 12. The outer wall of the convex ring 12 is provided with an external thread adapted to the internal thread of the through groove 5. The convex ring 12 is threadedly connected to the through groove 5. An annular groove 13 adapted to the sealing ring 8 is provided between the pipe mouth of the inner sleeve 3 and the convex ring 12. The sealing ring 8 is stuck in the annular groove 13. The connecting plate 11 is fixedly connected near the pipe mouth of the inner sleeve 3. The pipe mouth of the inner sleeve 3 will extend out of a part of the connecting plate 11, and this part will just cooperate with the inclined block 10. The convex ring 12 has an external thread adapted to the internal thread of the through groove 5, so that the convex ring 12 can be firmly fixed in the through groove 5 by threaded connection. , thereby providing a reliable connection and sealing effect. An annular groove 13 adapted to the sealing ring 8 is provided between the pipe mouth of the inner sleeve 3 and the convex ring 12. The design of this annular groove 13 enables it to accommodate the sealing ring 8, thereby providing an additional sealing effect to prevent leakage of refrigerant or other fluids. During the connection process, the connecting disc 11 and the convex ring 12 are inserted into the through groove 5 together, and the convex ring 12 is fixed in the through groove 5 by means of a threaded connection. At this time, the sealing ring 8 has been inserted into the annular groove 13 and fits tightly between the connecting disc 11 and the through groove 5. Since the external thread of the convex ring 12 fits tightly with the internal thread of the through groove 5, and the sealing ring 8 fits tightly in the annular groove 13, the connection structure can achieve a firm connection and a reliable sealing effect.

[0025] See also Figure 3In this embodiment, the inner sleeve 3 and the outer protective sleeve 9 both adopt a hose structure, lubricating oil is provided between the inner sleeve 3 and the outer protective sleeve 9, and the outer wall of the outer protective sleeve 9 is provided with convex small particles. The inner sleeve 3 and the outer protective sleeve 9 adopt a hose structure. This hose is made of highly elastic and corrosion-resistant materials, such as rubber. At the same time, the hose structure also allows the inner sleeve 3 to be flexibly arranged in a complex or curved pipeline 2 system, which is convenient for installation and maintenance. A layer of lubricating oil is also provided between the inner sleeve 3 and the outer protective sleeve 9. The function of this layer of lubricating oil is to reduce the friction between the inner sleeve 3 and the protective sleeve, thereby reducing the difficulty of installing the inner sleeve 3 and the outer protective sleeve 9. The convex small particles on the outer protective sleeve 9 are used to increase the friction between the outer protective sleeve 9 and the external pipeline 2 or the bracket to prevent the sleeve from moving during installation or use. At the same time, the convex small particles also provide additional gripping points, which facilitates the installer to install the inner sleeve 3 and the outer protective sleeve 9.

[0026] When working, first install the outer protective sleeve 9 to the outer wall of the inner sleeve 3, and use lubricating oil to reduce the friction between them to facilitate the installation process;

[0027] Next, the inner sleeve 3 is brought close to the pipe opening of the flange 4 using the connecting plate 11. At this point, the end of the inner sleeve 3 will hit the inclined surface of the bevel block 10 and will be gradually squeezed by the bevel block 10 as it is inserted deeper. This squeezing not only ensures that the inner sleeve 3 is firmly fixed in the pipe opening of the flange 4, but also generates additional tightening force through the bevel block 10, thereby enhancing the stability and sealing performance of the connection.

[0028] At the same time, the connecting plate 11 is rotated so that the external thread of the convex ring 12 is screwed into the internal thread of the through groove 5 of the flange 4, thus achieving the purpose of connection.

[0029] Through the above steps, the four-way reversing valve sleeve connection structure adopts a hose structure of an inner sleeve 3 and an outer protective sleeve 9, combined with a bevel block 10 fastening structure and a convex ring 12 connection structure, which not only realizes a detachable connection with the four-way reversing valve body 1 pipeline 2, but also significantly enhances the stability and sealing of the connection, effectively preventing refrigerant leakage. Compared with the traditional sleeve connection, this solution is more flexible, easy to install and maintain, ensuring the convenience and stability of the sleeve connection, and solving the problem that the traditional four-way reversing valve sleeve adopts a rigid sleeve to be directly connected to the flange 4, resulting in the connection between the rigid sleeve and the flange 4 cannot be tightly fitted, thereby reducing the sealing effect.

[0030] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A four-way reversing valve sleeve connection structure, comprising a four-way reversing valve body (1) and four pipes (2) installed in the four-way reversing valve body (1); characterized in that: It also includes an inner sleeve (3), each pipe mouth is installed with a flange (4), the connecting end surface of the flange (4) is provided with a through groove (5), the through groove (5) is provided with an internal thread, the connecting end surface of the flange (4) is also provided with a groove (7), the groove (7) is provided with a sealing ring (8), the pipe mouth of the flange (4) is provided with a fastening structure adapted to the inner sleeve (3), the outer wall of the inner sleeve (3) is sleeved with an outer protective sleeve (9), the pipe mouth of the inner sleeve (3) is provided with a connecting structure adapted to the flange (4), and the inner sleeve (3) is connected to the pipe (2) of the four-way reversing valve body (1) through the connecting structure.

2. The four-way reversing valve sleeve connection structure according to claim 1, characterized in that: The fastening structure is an inclined block (10); an inclined block (10) is installed around the pipe opening of the flange (4), the inclined surface of the inclined block (10) faces the pipe opening of the flange (4), and the inner sleeve (3) is inserted into the pipe opening of the flange (4) through the inclined block (10).

3. The four-way reversing valve sleeve connection structure according to claim 2, characterized in that: The connection structure comprises a connection plate (11) and a convex ring (12); the connection plate (11) is fixedly connected to the pipe mouth of the inner sleeve (3); the convex ring (12) is fixedly connected to the surface of the connection plate (11); the outer wall of the convex ring (12) is provided with an external thread adapted to the internal thread of the through groove (5); and the convex ring (12) is threadedly connected to the through groove (5).

4. The four-way reversing valve sleeve connection structure according to claim 3, characterized in that: An annular groove (13) adapted to the sealing ring (8) is provided between the pipe opening of the inner sleeve (3) and the convex ring (12), and the sealing ring (8) is snapped into the annular groove (13).

5. The four-way reversing valve sleeve connection structure according to claim 4, characterized in that: The inner sleeve (3) and the outer protective sleeve (9) both adopt a hose structure, and lubricating oil is provided between the inner sleeve (3) and the outer protective sleeve (9).

6. The four-way reversing valve sleeve connection structure according to claim 5, characterized in that: The outer wall of the outer protective sleeve (9) is provided with convex small particles.

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