A special-shaped pipe assembly with good sealing performance in a refrigeration system

Abstract

The present application provides a special-shaped pipe assembly with good sealing performance in a refrigeration system, and relates to the technical field of refrigeration systems. A special-shaped pipe assembly with good sealing performance in a refrigeration system includes a connecting pipe assembly, and a large-end active sealing mechanism includes an inner pressure assembly, an outer negative pressure assembly, and an axial guide. The inner pressure assembly axially slides through the large-end male flange, and the inner pressure assembly is inserted into the large-end female flange and sealed against the outer ring sealing ring; the outer negative pressure assembly axially seals and slides on the inner pressure assembly; the axial guide includes a screw and a plurality of outer ring guide rods, and the screw is used to drive the inner pressure assembly to axially displace, so that the inner pressure assembly is sealed against the outer ring sealing ring, so that the special-shaped pipe and the large-diameter pipe and the small-diameter pipe are sealed, and at the same time, pressure is applied to the outer ring sealing ring through the axial displacement of the pressure assembly, so that the outer ring sealing ring maintains its original shape and reduces the deformation phenomenon caused by the temperature difference.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration systems, and in particular to a special-shaped pipe assembly with good sealing performance in a refrigeration system. Background Art

[0002] Special-shaped pipe assemblies in refrigeration systems mainly refer to pipes whose shapes, sizes or structures are different from traditional round pipes. These special-shaped pipe assemblies play an important role in refrigeration systems, including but not limited to changing fluid flow direction, enhancing heat exchange effects, and optimizing system performance.

[0003] The sealing performance of the special-shaped pipe assembly in the fluid channel is very important. The existing special-shaped pipe assemblies usually adopt flange connection at the connection position, and use the two flanges to squeeze the sealing rings on their end faces to achieve the sealing effect. However, in the refrigeration system, the sealing ring will be affected by the strong temperature change and produce thermal expansion and contraction, so that the two sealing rings that were originally tightly abutted will shrink against each other, resulting in a decrease in the sealing performance. At the same time, the drastic temperature difference will accelerate the aging of the sealing ring, which will have a further adverse effect on the sealing performance of the special-shaped pipe assembly. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a special-shaped pipe assembly with good sealing performance in a refrigeration system, including a connecting pipe assembly, the connecting pipe assembly is composed of a special-shaped pipe and a large-diameter pipe and a small-diameter pipe fixedly connected to the two ends of the special-shaped pipe, the two ends of the special-shaped pipe are respectively fixedly connected with a large-end male flange and a small-end male flange of the same structure, the end of the large-diameter pipe is fixedly connected with a large-end female flange matched with the large-end male flange, the end face of the large-end female flange facing the large-end male flange is coaxially provided with a plurality of outer ring sealing rings, the end of the small-diameter pipe is fixedly connected with a small-end female flange matched with the small-end male flange, and the structure of the small-end female flange is the same as that of the large-end female flange; a large-end active sealing mechanism is provided between the large-end male flange and the large-end female flange, and a sealing ring is provided between the small-end male flange and the small-end female flange that matches the large-end female flange. The large-end active sealing mechanism comprises an inner pressure component, an outer negative pressure component and an axial guide, the inner pressure component axially slides through the large-end male flange, the inner pressure component is inserted into the large-end female flange and seals against the outer ring sealing ring; the outer negative pressure component axially seals and slides on the inner pressure component; the axial guide comprises a screw and a plurality of outer ring guide rods, the screw is rotatably connected to the large-end male flange, the screw and the inner pressure component are threadedly connected, the plurality of outer ring guide rods are fixed to the large-end male flange and slide through the inner pressure component and the outer negative pressure component, and the screw and the plurality of outer ring guide rods are located between the inner pressure component and the outer negative pressure component and are sleeved with an outer ring elastic member.

[0005] Preferably, a plurality of limiting cavities are coaxially arranged on the end surface of the large-end male flange facing the large-end female flange, and the limiting cavities are arranged in a closed annular shape.

[0006] Preferably, the end face of the large-end female flange is coaxially provided with a plurality of outer ring mounting grooves, and the plurality of outer ring mounting grooves correspond one to one with the plurality of outer ring sealing rings.

[0007] Preferably, the inner pressure assembly includes an end pressure ring and a plurality of pressure pieces, the end pressure ring is threadedly connected to the screw rod, the end pressure ring is slidably sleeved on the outer ring guide rod, the plurality of pressure pieces are coaxially fixed to the end pressure ring, the plurality of pressure pieces have the same structure, and the plurality of pressure pieces are sealingly slidably inserted into the plurality of limit cavities.

[0008] Preferably, the pressure piece is arranged in a closed annular shape, the annular pressure piece abuts against the outer ring sealing ring, one end of the pressure piece abuts against the outer ring sealing ring and is adapted to the outer ring sealing ring, the pressure piece includes a plurality of arc strips evenly arranged circumferentially, a blocking block is fixed between two adjacent arc strips, a pressure connecting rod is fixed to the blocking block, the pressure connecting rod is fixed to the end pressure ring and slides through the large end male flange.

[0009] Preferably, a negative pressure cavity is arranged in the arc strip along the arc direction, an axial through groove connected with the negative pressure cavity is arranged in the axial direction of the arc strip, the axial through groove passes through both ends of the arc strip, a plurality of radial grooves are coaxially arranged at one end of the arc strip away from the end pressure ring, the plurality of radial grooves are respectively connected with the axial through groove and pass through the upper and lower end faces of the arc strip, the plurality of radial grooves are arranged in a ring shape, and a plurality of axial grooves are evenly connected circumferentially between the plurality of radial grooves on the upper and lower end faces of the arc strip.

[0010] Preferably, when the arc strip abuts against the outer ring sealing ring, the plurality of radial grooves and the plurality of axial grooves are respectively covered by the outer ring sealing ring.

[0011] Preferably, the outer negative pressure assembly includes an end negative pressure ring and a plurality of negative pressure strips, the end negative pressure ring is slidably sleeved on the outer ring guide rod, the plurality of negative pressure strips are coaxially fixed to the end negative pressure ring, and the plurality of coaxially arranged negative pressure strips are evenly distributed circumferentially.

[0012] Preferably, a plurality of negative pressure connecting rods are respectively fixedly connected between the plurality of negative pressure strips and the end negative pressure ring, and the plurality of negative pressure connecting rods respectively slide through the large end male flange and the end pressure ring.

[0013] Preferably, the negative pressure strip seals and slides in the negative pressure chamber.

[0014] The beneficial effects of the present invention are:

[0015] The inner pressure component is driven by a screw to axially displace, so that the inner pressure component is sealed against the outer ring sealing ring, so that the sealing of the connection between the special-shaped tube and the large-diameter tube and the small-diameter tube is strengthened, and at the same time, pressure is applied to the outer ring sealing ring through the axial displacement of the pressure component, so that the outer ring sealing ring maintains its original shape and reduces deformation caused by temperature difference; the outer negative pressure component is used to perform reverse axial displacement in the inner pressure component, so that negative pressure is formed between the abutted outer ring sealing ring and the inner pressure component, and under the action of negative pressure, the sealing performance between the outer ring sealing ring and the inner pressure component is further enhanced; the elastic force applied to the outer negative pressure component by the outer ring elastic member can cause the outer negative pressure component to perform axial resetting action in the inner pressure component.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a cross-sectional view of special-shaped pipe assemblies connected to each other in the prior art;

[0019] Figure 2 This is a schematic structural diagram of a special-shaped pipe assembly with good sealing performance in a refrigeration system according to an embodiment of the present application;

[0020] Figure 3 It is a schematic structural diagram of a cross-sectional surface of a special-shaped pipe assembly with good sealing performance in a refrigeration system according to an embodiment of the present application;

[0021] Figure 4 It is a structural exploded diagram of the big-end active sealing mechanism and the corresponding big-end male flange and big-end female flange according to an embodiment of the present application;

[0022] Figure 5 According to the embodiment of the present application Figure 4 A magnified view of middle;

[0023] Figure 6 is a schematic structural diagram of one end face of a large-end male flange according to an embodiment of the present application;

[0024] Figure 7 It is a schematic structural diagram of a large-end male flange and a large-end female flange according to an embodiment of the present application;

[0025] Figure 8 is a structural cross-sectional view of a large-end active sealing mechanism according to an embodiment of the present application;

[0026] Fig. 9 is a structural exploded diagram of the inner pressure component according to an embodiment of the present application;

[0027] Fig.10 is a structural exploded diagram of a pressure-applying member according to an embodiment of the present application;

[0028] Fig.11 is a schematic structural diagram of a cross-sectional view of an arc strip according to an embodiment of the present application;

[0029] Fig.12 is a partial structural schematic diagram of an outer negative pressure assembly according to an embodiment of the present application;

[0030] Fig.13 is a schematic cross-sectional structural diagram of a large-end male flange and a large-end female flange according to an embodiment of the present application;

[0031] Fig.14 According to the embodiment of the present application Fig.13 A magnified schematic diagram of B;

[0032] Fig.15 is a structural exploded diagram of a large-end energy-saving member and a partial large-end female flange according to an embodiment of the present application;

[0033] Fig.16 It is a schematic diagram of the structure of a large-end energy-saving component according to an embodiment of the present application.

[0034] Icons: 1. Connecting pipe assembly; 11. Special-shaped pipe; 111. Large-end male flange; 112. Small-end male flange; 113. Limiting cavity; 114. Inner ring mounting cavity; 115. Arc groove; 116. First through hole; 117. Second through hole; 12. Large-diameter pipe; 121. Large-end female flange; 122. Outer ring sealing ring; 123. Outer ring mounting groove; 124. Inner ring mounting groove; 125. Back groove; 13. Small-diameter pipe; 131. Small-end female flange; 2. Large-end active sealing mechanism; 21. Inner side pressure assembly; 211. End pressure ring; 212. Pressure piece; 213. Arc strip; 214. Block; 215. Pressure Press-connecting rod; 216, negative pressure cavity; 217, axial through groove; 218, radial groove; 219, axial groove; 22, outer negative pressure assembly; 221, end negative pressure ring; 222, negative pressure strip; 223, negative pressure connecting rod; 23, axial guide; 231, screw; 232, outer ring guide rod; 233, outer ring elastic member; 24, first closing assembly; 241, ring block; 242, inner ring sealing ring; 243, inner ring guide rod; 244, inner ring elastic member; 25, second closing assembly; 3, large end energy-saving member; 31, energy-saving sheet; 311, notch; 32, fixing ring; 4, small end active sealing mechanism; 5, small end energy-saving member. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0036] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Embodiment 1, as Figure 1-Figure 16 As shown, according to an embodiment of the present application, a special-shaped pipe assembly with good sealing performance in a refrigeration system includes a connecting pipe assembly 1, which is composed of a special-shaped pipe 11 and a large-diameter pipe 12 and a small-diameter pipe 13 fixedly connected to both ends of the special-shaped pipe 11.

[0038] like Figure 1 As shown, in the prior art, when the special-shaped pipe 11 and the large-diameter pipe 12 and the small-diameter pipe 13 are connected, they are usually directly connected by flanges, and the sealing strips on the two flanges are used to achieve the sealing of the pipeline connection by relying on the close contact between adjacent flanges.

[0039] In the specific embodiments of the present application, Figure 2 and Figure 3 As shown, the two ends of the special-shaped tube 11 are respectively fixedly connected with a large-end male flange 111 and a small-end male flange 112 of the same structure, the end of the large-diameter tube 12 is fixedly connected with a large-end female flange 121 matched with the large-end male flange 111, and the end face of the large-end female flange 121 facing the large-end male flange 111 is coaxially provided with a plurality of outer ring sealing rings 122, and the end of the small-diameter tube 13 is fixedly connected with a small-end female flange 131 matched with the small-end male flange 112, and the structure of the small-end female flange 131 is the same as that of the large-end female flange 121, so the description below only describes the end with a larger pipe diameter.

[0040] It should be noted that, in the specific embodiment of the present application, the radial cross-section of the outer ring sealing ring 122 is V-shaped, and the open end of the V-shaped outer ring sealing ring 122 faces the side where the large end male flange 111 is located.

[0041] Specifically, a large-end active sealing mechanism 2 is arranged between the large-end male flange 111 and the large-end female flange 121 , and a small-end active sealing mechanism 4 having the same structure as the large-end active sealing mechanism 2 is arranged between the small-end male flange 112 and the small-end female flange 131 .

[0042] Among them, Figure 2-Figure 4As shown, the big-end active sealing mechanism 2 includes an inner pressure component 21, an outer negative pressure component 22 and an axial guide 23. The inner pressure component 21 slides axially through the big-end male flange 111, and the inner pressure component 21 is inserted into the big-end female flange 121 and abuts against the outer ring sealing ring 122, thereby realizing the sealing between the two flanges.

[0043] The outer negative pressure component 22 axially seals and slides on the inner pressure component 21;

[0044] like Figure 4 and Figure 5 As shown, the axial guide member 23 includes a screw 231 and a plurality of outer ring guide rods 232. The screw 231 is rotatably connected to the large end male flange 111. The screw 231 and the inner pressure assembly 21 are threadedly connected. The plurality of outer ring guide rods 232 are fixed to the large end male flange 111 and slide through the inner pressure assembly 21 and the outer negative pressure assembly 22. The portion of the screw 231 and the plurality of outer ring guide rods 232 located between the inner pressure assembly 21 and the outer negative pressure assembly 22 is sleeved with an outer ring elastic member 233.

[0045] It can be seen that the inner pressure component 21 can be driven to axially displace on the large-end male flange 111 through the screw 231, and the outer ring elastic member 233 can make the outer negative pressure component 22 have an elastic displacement function relative to the inner pressure component 21.

[0046] Specifically, Figure 6 As shown, a plurality of limiting cavities 113 are coaxially arranged on the end surface of the large-end male flange 111 facing the large-end female flange 121, and the limiting cavities 113 are arranged in a closed annular shape.

[0047] like Figure 7 As shown, the end face of the big end female flange 121 is coaxially provided with a plurality of outer ring mounting grooves 123, and the plurality of outer ring mounting grooves 123 correspond one to one with the plurality of outer ring sealing rings 122. It should be noted that after the outer ring sealing ring 122 is embedded in the outer ring mounting groove 123, the end face of the V-shaped outer ring sealing ring 122 extends out of the outer ring mounting groove 123, so that when the big end male flange 111 and the big end female flange 121 are fixed together by nuts, extrusion is formed between the end face of the big end male flange 111 and the end face of the outer ring sealing ring 122, that is, a seal is formed.

[0048] It should be noted that if Fig.14 As shown, there is a one-to-one correspondence between the limiting cavity 113 and the outer ring mounting groove 123 , and the end faces of the large-end male flange 111 and the large-end female flange 121 are not affected by the limiting cavity 113 and the outer ring mounting groove 123 during the abutment process.

[0049] like Figure 3 , Figure 8 and Fig. 9As shown, in a specific embodiment of the present application, the inner pressure assembly 21 includes an end pressure ring 211 and a plurality of pressure pieces 212. The end pressure ring 211 and the screw 231 are threadedly connected. The end pressure ring 211 is slidably sleeved on the outer ring guide rod 232. It can be seen that the outer ring guide rod 232 can be used to achieve rotational interference with the end pressure ring 211. Therefore, when the screw 231 rotates, the end pressure ring 211 can and can only be displaced along the axial direction; the plurality of pressure pieces 212 are coaxially fixed to the end pressure ring 211, the plurality of pressure pieces 212 have the same structure, and the plurality of pressure pieces 212 are sealed and slidably inserted into the plurality of limit cavities 113.

[0050] It can be understood that the pressure piece 212 will synchronously undergo axial displacement following the end pressure ring 211. Therefore, when the end of the pressure piece 212 moves out of the limiting cavity 113, it will move toward the direction of the V-shaped outer ring sealing ring 122 until it forms a tight abutment with the open side of the V-shaped outer ring sealing ring 122 to achieve a sealing effect.

[0051] It should be noted that, in the specific embodiment of the present application, the pressure member 212 abuts against one end of the V-shaped outer ring seal 122 , and its shape is adapted to the shape of the open side of the V-shaped outer ring seal 122 .

[0052] Specifically, Figure 9-11 As shown, the pressure piece 212 is arranged in a closed ring shape, and the annular pressure piece 212 abuts against the outer ring sealing ring 122. The pressure piece 212 abuts against one end of the outer ring sealing ring 122 and is adapted to the outer ring sealing ring 122. The pressure piece 212 includes a plurality of arc strips 213 evenly arranged in the circumferential direction, and a blocking block 214 is fixedly connected between two adjacent arc strips 213. A pressure connecting rod 215 is fixedly connected to the blocking block 214. The pressure connecting rod 215 is fixedly connected to the end pressure ring 211 and slides through the large end male flange 111.

[0053] It should be noted that if Figure 6 As shown, in a specific embodiment of the present application, a plurality of arc-shaped grooves 115 are evenly arranged axially in the limiting cavity 113, a first through hole 116 is arranged between two adjacent arc-shaped grooves 115, at least two second through holes 117 are evenly arranged along the arc direction in the arc groove 115, and the pressure connecting rod 215 and the first through hole 116 are slidably matched.

[0054] Further, such as Fig.11As shown, a negative pressure cavity 216 is provided in the arc strip 213 along the arc direction, an axial through groove 217 connected with the negative pressure cavity 216 is provided in the arc strip 213 along the axial direction, the axial through groove 217 passes through both ends of the arc strip 213, and a plurality of radial grooves 218 are coaxially provided at one end of the arc strip 213 away from the end pressure ring 211, the plurality of radial grooves 218 are respectively connected to the axial through groove 217 and pass through the upper and lower end surfaces of the arc strip 213, the plurality of radial grooves 218 are arranged in a ring shape, and a plurality of axial grooves 219 are respectively and circumferentially evenly connected between the plurality of radial grooves 218 on the upper and lower end surfaces of the arc strip 213.

[0055] It should be noted that when the arc strip 213 abuts against the outer ring seal ring 122 , the plurality of radial grooves 218 and the plurality of axial grooves 219 are respectively covered by the outer ring seal ring 122 .

[0056] like Figure 4 , Figure 8 and Fig.12 As shown, the outer negative pressure assembly 22 includes an end negative pressure ring 221 and a plurality of negative pressure strips 222. The end negative pressure ring 221 is slidably mounted on the outer ring guide rod 232. The plurality of negative pressure strips 222 are coaxially fixed to the end negative pressure ring 221. The coaxially arranged plurality of negative pressure strips 222 are evenly distributed circumferentially.

[0057] It should be noted that the end negative pressure ring 221 is also slidably sleeved on the screw 231 and its position is not affected by the rotation of the screw 231 .

[0058] Specifically, a plurality of negative pressure connecting rods 223 are respectively fixedly connected between the plurality of negative pressure strips 222 and the end negative pressure ring 221 , and the plurality of negative pressure connecting rods 223 respectively slide through the large end male flange 111 and the end pressure ring 211 .

[0059] It should be noted that the negative pressure strip 222 slides in the negative pressure chamber 216 in a sealing manner.

[0060] It should be further explained that the radial cross-section of the negative pressure strip 222 is H-shaped, and one end thereof facing the radial groove 218 is sealed and slidably connected to the negative pressure chamber 216 , and the negative pressure connecting rod 223 passes through the axial through groove 217 and slidably cooperates with the second through hole 117 .

[0061] The following describes the use process of a special-shaped pipe assembly with good sealing performance in a refrigeration system according to an embodiment of the present application with reference to the accompanying drawings:

[0062] When the large diameter tube 12 and the small diameter tube 13 are connected together to form axial communication by using the special-shaped tube 11, the outer ring sealing ring 122 on the large end female flange 121 and the corresponding small end female flange 131 and the sealing ring thereon are first installed, and then the corresponding large end male flange 111 and the large end female flange 121 and the small end male flange 112 and the small end female flange 131 are fixed by bolts to form a tight abutment, and the corresponding sealing ring is squeezed to form a preliminary sealing state, and then the corresponding large end active sealing mechanism 2 and the small end active sealing mechanism 4 on the large end male flange 111 and the small end male flange 112 are adjusted respectively to make the large end male flange 111 The sealing performance between the large-end female flange 121 and the small-end male flange 112 and the small-end female flange 131 is enhanced. Specifically, taking the large-end active sealing mechanism 2 as an example, first press the end negative pressure ring 221 to make the negative pressure strip 222 move toward the radial groove 218 in the negative pressure chamber 216, and then rotate the screw 231 to make the end pressure ring 211 axially displaced, and drive the coaxially arranged multiple annular pressure pieces 212 to move toward the V-shaped outer ring sealing ring 122, until the pressure piece 212 and the outer ring sealing ring 122 form a tight abutment state. At this time, a sealing state is formed between the pressure piece 212 and the outer ring sealing ring 122, and then release the screw 231. The extrusion of the end negative pressure ring 221, under the elastic force of the outer ring elastic member 233, will force the end negative pressure ring 221 to reset, that is, to move away from the outer ring sealing ring 122. In this process, a seal is formed between the pressure member 212 and the outer ring sealing ring 122, and there is a sealing relationship between the negative pressure strip 222 and the negative pressure cavity 216. Therefore, as the negative pressure strip 222 moves away from the outer ring sealing ring 122, negative pressure will be formed between the negative pressure cavity 216, the axial through groove 217, the radial groove 218 and the axial groove 219 that are interconnected between the negative pressure strip 222 and the outer ring sealing ring 122. Under the action of the negative pressure, a negative pressure is formed on the outer ring sealing ring 122. A certain suction force causes the outer ring sealing ring 122 to partially deform toward the negative pressure chamber 216, the axial through groove 217, the radial groove 218 and the axial groove 219, that is, the suction force formed by the negative pressure is used to further form a better sealing effect between the outer ring sealing ring 122 and the pressure piece 212. This design allows the outer ring sealing ring 122 to be subjected to better extrusion pressure. At the same time, the V-shaped design cooperates with the pressure applied by the pressure piece 212 to achieve a shaping effect, reducing the deformation of the outer ring sealing ring 122 caused by temperature changes. At the same time, the negative pressure formed inside the pressure piece 212 can further enhance the sealing performance between the outer ring sealing ring 122 and the pressure piece 212.

[0063] In the related art, in a special-shaped pipe assembly with good sealing performance in a refrigeration system, after a sealing state is formed between the large-end male flange 111 and the large-end female flange 121, there is no sealing measure on the inner side of the two (i.e., the side close to the axial direction), so during the infusion process, the liquid will climb axially outward along the gap between the two. Although the liquid will eventually be blocked by the coaxially arranged multi-layer outer ring sealing ring 122 and the pressure member 212, as the liquid climbs, it will cause a certain adverse effect on the sealing performance between the outer ring sealing ring 122 and the pressure member 212.

[0064] Embodiment 2, according to some embodiments of the present application, such as Figure 6 , Figure 7 , Fig.13 and Fig.14 As shown, an inner ring mounting cavity 114 is coaxially arranged at the end of the large-end male flange 111, and an inner ring mounting groove 124 is coaxially arranged at the end of the large-end female flange 121. The inner ring mounting cavity 114 and the inner ring mounting groove 124 are coaxial and have the same diameter. A first closing component 24 and a second closing component 25 having the same structure are elastically arranged in the inner ring mounting cavity 114 and the inner ring mounting groove 124 respectively, and adjacent end faces of the first closing component 24 and the second closing component 25 are elastically sealed and abutted against each other.

[0065] The inner ring installation cavity 114 and the inner ring installation groove 124 are respectively located in the direction close to the axis of the large end male flange 111 and the large end female flange 121 .

[0066] Specifically, the first sealing component 24 includes a ring block 241 that coaxially seals and limits sliding in the inner ring installation cavity 114 . The ring block 241 is elastic in the axial direction of the inner ring installation cavity 114 . An inner ring sealing ring 242 is coaxially fixed to the ring block 241 , and the inner ring sealing ring 242 faces the inner ring installation groove 124 .

[0067] Furthermore, a plurality of inner ring guide rods 243 are evenly fixedly connected to one end of the ring stopper 241 away from the inner ring sealing ring 242 in the circumferential direction, and the plurality of inner ring guide rods 243 are slidably inserted into the large end male flange 111 .

[0068] Furthermore, an inner ring elastic member 244 is sleeved on the inner ring guide rod 243 , one end of the inner ring elastic member 244 abuts against the large-end male flange 111 , and the other end of the inner ring elastic member 244 abuts against the ring stopper 241 .

[0069] It should be noted that when the two flanges are not in contact with each other, the ring stopper 241 is located at the outermost side of the inner ring installation cavity 114 (such as Fig.14 As shown, flanges are provided on the outer side of the inner ring installation cavity 114 in the up and down directions to limit the ring block 241 and prevent the ring block 241 from falling off from the inner ring installation cavity 114).

[0070] Therefore, when the two flanges are fixed by screws during use, elastic contact will be formed between the first closing component 24 and the second closing component 25. Fig.14 As shown, the inner ring sealing ring 242 on the first sealing component 24 will form an abutment with the sealing ring corresponding to the second sealing component 25. Under the action of the inner ring elastic member 244 and the corresponding elastic member in the second sealing component 25, the first sealing component 24 and the second sealing component 25 will be respectively displaced to the inner side of the corresponding inner ring mounting cavity 114 and the inner ring mounting groove 124. It should be noted here that the inner ring sealing ring 242 and the inner ring mounting cavity 114 are sealed and slidably connected. Similarly, the sealing ring in the second sealing component 25 and the inner ring mounting groove 124 are also sealed and slidably connected. In this way, when the two flanges are fixed, the elastic abutment between the first sealing component 24 and the second sealing component 25 will block the liquid from climbing radially from the side close to the axis of the two flanges, so as to avoid the liquid from causing adverse effects on the outer ring sealing ring 122 of the outer layer and the pressure member 212, and to avoid affecting the sealing performance between the two flanges.

[0071] In the related art, the special-shaped pipe assembly with good sealing performance in the refrigeration system has a temperature range of its use environment that is far from the temperature range of the normal environment. Therefore, high or low temperatures will inevitably have an impact on the outer ring sealing ring 122, aggravating the aging of the outer ring sealing ring 122 and adversely affecting the sealing performance of the entire special-shaped pipe assembly.

[0072] Embodiment 3, according to some embodiments of the present application, such as Figure 2 , Figure 3 , Fig.15 and Fig.16 As shown, a large-end energy escape component 3 is embedded on the side of the large-end female flange 121 away from the large-end male flange 111, and a small-end energy escape component 5 with the same structure as the large-end energy escape component 3 is embedded on the side of the small-end female flange 131 away from the small-end male flange 112. The large-end energy escape component 3 includes a plurality of energy escape sheets 31 and a fixing ring 32. The plurality of energy escape sheets 31 are evenly arranged in the circumferential direction, and the plurality of energy escape sheets 31 are fixedly connected to the fixing ring 32.

[0073] It should be noted that, in the specific embodiment of the present application, the energy sheet 31 is preferably made of a metal material with high thermal conductivity.

[0074] A back groove 125 is coaxially arranged on one side of the large-end female flange 121 away from the large-end male flange 111 , and the back groove 125 and the outer ring mounting groove 123 are arranged alternately.

[0075] Specifically, a notch 311 is provided on one side of the energy-saving sheet 31 , and the notch 311 is matched with the back groove 125 .

[0076] Therefore, when it is used specifically, the liquid that circulates for a long time in the special-shaped pipe assembly in the present application will transfer the temperature of the liquid to the position of the outer ring sealing ring 122, that is, to the outer ring mounting groove 123, through the special-shaped pipe assembly itself, which will interfere with the service life of the outer ring sealing ring 122. The back groove 125 staggered with the outer ring mounting groove 123 will first reduce the thickness of the large-end female flange 121 where the outer ring sealing ring 122 is installed, so that the outer ring mounting groove 123 can exchange heat with the external environment through the corresponding back groove 125. At the same time, Fig.15 As shown, the shape setting of the back groove 125 also enhances the contact area between the outer ring mounting groove 123 and the outside world, and the energy-saving sheet 31 which is evenly arranged in the back groove 125 in the circumferential direction and forms a "bite" shape between the notch 311 and the back groove 125 will further increase the contact area between the outer ring mounting groove 123 and the outside world, and further enhance the heat exchange effect between the outer ring mounting groove 123 and the outside world. In this way, the adverse effect of the temperature of the transported liquid on the outer ring sealing ring 122 will be greatly reduced. Through the heat exchange effect formed with the outside world, the temperature range of the outer ring sealing ring 122 is made as close to the temperature range of the normal environment as possible, thereby extending the service life of the outer ring sealing ring 122, thereby enhancing the sealing performance of the special-shaped pipe assembly and ensuring its sealing effect.

[0077] It should be noted that the specific model specifications of the outer ring elastic member 233 and the inner ring elastic member 244 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0078] The above description is only the preferred implementation mode of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A special-shaped pipe assembly with good sealing performance in a refrigeration system, comprising a connecting pipe assembly (1), wherein the connecting pipe assembly (1) is composed of a special-shaped pipe (11) and a large-diameter pipe (12) and a small-diameter pipe (13) fixedly connected to both ends of the special-shaped pipe (11), characterized in that: The two ends of the special-shaped tube (11) are respectively fixedly connected with a large end male flange (111) and a small end male flange (112) of the same structure; the end of the large diameter tube (12) is fixedly connected with a large end female flange (121) matched with the large end male flange (111); the end surface of the large end female flange (121) facing the large end male flange (111) is coaxially provided with a plurality of outer ring sealing rings (122); the end of the small diameter tube (13) is fixedly connected with a small end female flange (131) matched with the small end male flange (112); the structure of the small end female flange (131) is the same as that of the large end female flange (121); A large-end active sealing mechanism (2) is provided between the large-end male flange (111) and the large-end female flange (121), and a small-end active sealing mechanism (4) having the same structure as the large-end active sealing mechanism (2) is provided between the small-end male flange (112) and the small-end female flange (131); The large-end active sealing mechanism (2) comprises: An inner pressure component (21), the inner pressure component (21) axially slidingly passing through the large-end male flange (111), the inner pressure component (21) being plugged into the large-end female flange (121) and sealingly abutting against the outer ring sealing ring (122); An outer negative pressure component (22), the outer negative pressure component (22) axially sealingly slides on the inner pressure component (21); An axial guide member (23), the axial guide member (23) comprising a screw (231) and a plurality of outer ring guide rods (232), the screw (231) being rotatably connected to the large end male flange (111), the screw (231) and the inner pressure assembly (21) being threadedly connected, the plurality of outer ring guide rods (232) being fixed to the large end male flange (111) and slidingly passing through the inner pressure assembly (21) and the outer negative pressure assembly (22), the portion of the screw (231) and the plurality of outer ring guide rods (232) located between the inner pressure assembly (21) and the outer negative pressure assembly (22) being sleeved with an outer ring elastic member (233).

2. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 1, characterized in that: A plurality of limiting cavities (113) are coaxially arranged on the end surface of the large-end male flange (111) facing the large-end female flange (121), and the limiting cavities (113) are arranged in a closed annular shape.

3. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 1, characterized in that: The end surface of the large-end female flange (121) is coaxially provided with a plurality of outer ring mounting grooves (123), and the plurality of outer ring mounting grooves (123) and the plurality of outer ring sealing rings (122) correspond one to one.

4. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 2, characterized in that: The inner pressure assembly (21) comprises an end pressure ring (211) and a plurality of pressure pieces (212); the end pressure ring (211) and the screw rod (231) are threadedly connected; the end pressure ring (211) is slidably sleeved on the outer ring guide rod (232); the plurality of pressure pieces (212) are coaxially fixed to the end pressure ring (211); the plurality of pressure pieces (212) have the same structure; and the plurality of pressure pieces (212) are sealingly slidably inserted into the plurality of limiting cavities (113).

5. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 4, characterized in that: The pressure piece (212) is arranged in a closed ring shape, and the ring-shaped pressure piece (212) abuts against the outer ring sealing ring (122). The pressure piece (212) abuts against one end of the outer ring sealing ring (122) and is adapted to the outer ring sealing ring (122). The pressure piece (212) includes a plurality of arc strips (213) uniformly arranged in the circumferential direction, and a blocking block (214) is fixedly connected between two adjacent arc strips (213). A pressure connecting rod (215) is fixedly connected to the blocking block (214), and the pressure connecting rod (215) is fixedly connected to the end pressure ring (211) and slides through the large end male flange (111).

6. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 5, characterized in that: A negative pressure cavity (216) is arranged in the arc strip (213) along the arc direction, and an axial through groove (217) connected to the negative pressure cavity (216) is arranged in the arc strip (213) along the axial direction. The axial through groove (217) passes through both ends of the arc strip (213). A plurality of radial grooves (218) are coaxially arranged at one end of the arc strip (213) away from the end pressure ring (211). The plurality of radial grooves (218) are respectively connected to the axial through groove (217) and pass through the upper and lower end surfaces of the arc strip (213). The plurality of radial grooves (218) are arranged in a ring shape, and a plurality of axial grooves (219) are circumferentially and evenly connected between the plurality of radial grooves (218) on the upper and lower end surfaces of the arc strip (213).

7. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 6, characterized in that: When the arc strip (213) abuts against the outer ring sealing ring (122), the plurality of radial grooves (218) and the plurality of axial grooves (219) are respectively covered by the outer ring sealing ring (122).

8. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 6, characterized in that: The outer negative pressure assembly (22) comprises an end negative pressure ring (221) and a plurality of negative pressure strips (222); the end negative pressure ring (221) is slidably sleeved on the outer ring guide rod (232); the plurality of negative pressure strips (222) are coaxially fixed to the end negative pressure ring (221); and the plurality of coaxially arranged negative pressure strips (222) are evenly distributed in the circumferential direction.

9. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 8, characterized in that: A plurality of negative pressure connecting rods (223) are respectively fixedly connected between the plurality of negative pressure strips (222) and the end negative pressure ring (221), and the plurality of negative pressure connecting rods (223) respectively slide through the large end male flange (111) and the end pressure ring (211).

10. A special-shaped pipe assembly with good sealing performance in a refrigeration system according to claim 9, characterized in that: The negative pressure strip (222) is sealingly slidable in the negative pressure chamber (216).

Images