Connector sealing structure for carbon dioxide refrigerating system

Abstract

The utility model provides a connector sealing structure for a carbon dioxide refrigerating system. According to the connector sealing structure for the carbon dioxide refrigerating system, a conical sealing gasket is arranged at the bottom of the inner wall of a male connector, a conical supporting head is arranged at the top of the conical sealing gasket, a first connecting pipe is fixedly connected to the bottom end of the conical supporting head, a conical sealing ring is arranged at the top of the conical supporting head, and a second connecting pipe is fixedly connected to the bottom end of the conical sealing ring. An inner threaded ring is arranged at the position, close to the top end, of the inner surface of the male connector, the outer threaded pipe is in threaded connection to the position, located at the top end, of the interior of the male connector, the top end of the outer threaded pipe is fixedly connected with a female connector, and a contact gasket is arranged at the bottom of the inner wall of the female connector. According to the connector sealing structure for the carbon dioxide refrigerating system, through the design, the embedded wrapping type conical sealing ring and the conical butt joint are matched with each other, so that the expansion resistance of the connecting position is improved, the sealing stability is improved, and the leakage risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide refrigeration system connection, in particular to a joint sealing structure for a carbon dioxide refrigeration system. Background Art

[0002] Carbon dioxide, a carbon oxide compound with the chemical formula CO₂ and a chemical formula weight of 44.0095, is a colorless and odorless or colorless and stinking gas at normal temperature and pressure, and its aqueous solution has a slightly sour taste. It is also a common greenhouse gas and a component of air.

[0003] Both NH₃ and CO₂ used in the NH₃ / CO₂ cascade or secondary refrigerant system are natural refrigerants and are not restricted by environmental protection policies. NH₃, as a high-temperature refrigerant, only operates in the machine room system, with a small filling amount, and takes advantage of its good heat transfer performance under high-temperature working conditions; CO₂, as a safe, non-toxic, non-flammable low-temperature refrigerant or secondary refrigerant, enters the cold room evaporator for heat exchange, taking advantage of its still good heat transfer performance under low-temperature working conditions and avoiding its disadvantage of relatively high pressure under high-temperature working conditions. The NH₃ / CO₂ cascade system is applied in freezing, refrigeration, and freeze-drying. When CO₂ is used as the low-temperature refrigerant, a low temperature of -40°C to -52°C can be achieved, and its ammonia filling amount can be reduced by about 90% compared to an ammonia two-stage system with the same refrigerating capacity. Another important difference is the different working pressures of CO₂ and ammonia.

[0004] Since the carbon dioxide system uses pipeline transportation during operation, the O-ring seal used in the pipeline connector is prone to expansion under the high pressure brought by the operation of the carbon dioxide system, accelerating the aging of the seal, thereby affecting the sealing performance of the connector.

[0005] Therefore, it is necessary to provide a joint sealing structure for a carbon dioxide refrigeration system to solve the above technical problems. Summary of the Invention

[0006] The utility model provides a joint sealing structure for a carbon dioxide refrigeration system, which solves the problem that the O-ring seal used in the carbon dioxide system connector is prone to expansion under high pressure, accelerating aging and thus affecting the sealing performance of the connector.

[0007] To solve the above technical problems, the joint sealing structure for a carbon dioxide refrigeration system provided by the utility model includes: a male connector;

[0008] A conical gasket, the conical gasket is arranged at the bottom of the inner wall of the male connector. A conical support head is arranged at the top of the conical gasket. A first connecting pipe is fixedly connected to the bottom end of the conical support head. A conical sealing ring is arranged at the top of the conical support head. An internal thread ring is provided at a position near the top end of the inner surface of the male connector;

[0009] External threaded pipe, the external threaded pipe is threadedly connected to the position at the top inside the male connector, the top of the external threaded pipe is fixedly connected with a female connector, a contact washer is arranged at the bottom of the inner wall of the female connector, a tapered docking head is arranged at the bottom end of the contact washer, a second connecting pipe is fixedly connected to the top end of the tapered docking head, and a through hole through which the second connecting pipe can pass is opened at the top of the female connector;

[0010] There is a groove at the top of the tapered sealing gasket that can fit with the bottom of the tapered support head. There is a through hole for gas to flow through between the tapered support head and the first connecting pipe. The contact washer is located at a position near the top inside the external threaded pipe. The female connector is connected to the male connector through the external threaded pipe. After the male connector and the female connector are connected, the bottom protrusion of the tapered docking head is stuck into the top groove of the tapered sealing ring, forming an embedded and wrapped connection, increasing the anti-expansion property and sealing property.

[0011] Furthermore, convex rings are fixedly connected to the inner surface of the male connector near the bottom. Installation grooves are opened on the outer surface and the bottom of the tapered sealing ring;

[0012] The positions of the two installation grooves correspond to those of the two convex rings. After the tapered sealing ring is installed.

[0013] Furthermore, anti-slip threads are opened on the outer surface of the female connector. A plurality of card slots are opened on the outer surfaces of the first connecting pipe and the second connecting pipe, and first sealing rings are arranged inside the card slots;

[0014] The first sealing rings are sleeved on the outer surfaces of the first connecting pipe and the second connecting pipe.

[0015] Furthermore, a placement groove is opened on the outer surface of the tapered docking head, and an outer sealing ring is arranged inside the placement groove;

[0016] The placement groove is located at the position where the tapered docking head contacts the inner surface of the external threaded pipe.

[0017] Furthermore, a collar is arranged on the outer surface of the male connector. Connecting bolts are installed on opposite sides of the outer surface of the collar through connecting blocks. Opposite ends of the two connecting bolts are installed with a sealing frame through bolts;

[0018] Holes for inserting pipes are opened on both sides of the sealing frame. The bolts pass through the sealing frame and are threadedly connected to the connecting bolts.

[0019] Furthermore, a lid is installed on the top of the sealing frame through a sealing plug. A control box and a handle are respectively installed on the top of the lid. Carbon dioxide sensors are installed on the top of the lid near both sides;

[0020] The monitoring end of the carbon dioxide sensor is located below the lid, and can monitor the concentration of carbon dioxide inside the sealed frame.

[0021] Compared with the related art, the joint sealing structure for a carbon dioxide refrigeration system provided by the present utility model has the following beneficial effects:

[0022] The present utility model provides a joint sealing structure for a carbon dioxide refrigeration system. In order to increase the stability of the connection head seal used in the carbon dioxide system, the connection head is first divided into a male connection head and a female connection head. Then, a conical sealing gasket is placed at the bottommost part of the inner wall of the male connection head. Next, a metal conical support head is inserted from the top of the male connection head using a first connecting pipe, and the first connecting pipe is made to pass through the bottom end of the male connection head, so that the bottom of the conical support head contacts the top of the conical sealing gasket, which can seal the connection between the first connecting pipe and the male connection head. After that, a conical sealing ring is placed in the conical groove above the conical support head, and a contact gasket is placed at the top of the inner wall of the female connection head. The use of embedded sealing can increase the sealing performance at the contact position between the conical docking head and the conical support head, and can increase the anti-expansion performance. Then, the conical docking head is installed inside the female connection head through a second connecting pipe, and the top end of the conical docking head is made to contact the contact gasket. Finally, it is only necessary to connect the female connection head to the male connection head through an external threaded pipe, and make the conical docking head fit tightly with the conical sealing ring. Through this design, the use of an embedded and wrapped conical sealing ring and a conical docking head cooperate with each other to increase the anti-expansion property at the connection, increase the sealing stability, and reduce the risk of leakage. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the first embodiment of the joint sealing structure for a carbon dioxide refrigeration system provided by the present utility model;

[0024] Figure 2 is a schematic structural diagram of the conical sealing ring provided by the present utility model;

[0025] Figure 3 is a schematic structural diagram of the conical docking head provided by the present utility model;

[0026] Figure 4 provided by the present utility model Figure 2 is an enlarged view of the area A shown;

[0027] Figure 5 is a schematic structural diagram of the second embodiment of the joint sealing structure for a carbon dioxide refrigeration system provided by the present utility model;

[0028] Figure 6 provided by the present utility model Figure 5 is an enlarged view of the area B shown;

[0029] Reference numerals in the figure: 1, male connector; 2, first connecting pipe; 3, anti-slip pattern; 4, female connector; 5, second connecting pipe; 6, first sealing ring; 7, card slot; 8, installation groove; 9, conical sealing gasket; 10, conical supporting head; 11, conical sealing ring; 12, internal thread ring; 13, contact gasket; 14, external thread pipe; 15, through hole; 16, convex ring; 17, conical docking head; 18, external sealing ring; 19, placement groove; 20, sealing plug; 21, lid; 22, carbon dioxide sensor; 23, handle; 24, control box; 25, sealing frame; 26, bolt; 27, connecting block; 28, connecting bolt; 29, collar. Detailed implementation mode

[0030] The present utility model will be further described below in conjunction with the accompanying drawings and the implementation mode.

[0031] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , wherein, Figure 1 is a schematic structural diagram of the first embodiment of the joint sealing structure for the carbon dioxide refrigeration system provided by the present utility model; Figure 2 is a schematic structural diagram of the conical sealing ring provided by the present utility model; Figure 3 is a schematic structural diagram of the conical docking head provided by the present utility model; Figure 4 is provided by the present utility model Figure 2 The enlarged view of the A position shown in. The joint sealing structure for the carbon dioxide refrigeration system includes: male connector 1;

[0032] Conical sealing gasket 9, the conical sealing gasket 9 is arranged at the bottom of the inner wall of the male connector 1, a conical supporting head 10 is arranged at the top of the conical sealing gasket 9, the bottom end of the conical supporting head 10 is fixedly connected with the first connecting pipe 2, a conical sealing ring 11 is arranged at the top of the conical supporting head 10, and an internal thread ring 12 is arranged at a position near the top of the inner surface of the male connector 1;

[0033] External thread pipe 14, the external thread pipe 14 is threadedly connected to the position at the top inside the male connector 1, the top end of the external thread pipe 14 is fixedly connected with the female connector 4, a contact gasket 13 is arranged at the bottom of the inner wall of the female connector 4, a conical docking head 17 is arranged at the bottom end of the contact gasket 13, the top end of the conical docking head 17 is fixedly connected with the second connecting pipe 5, and a through hole 15 through which the second connecting pipe 5 can pass is arranged at the top end of the female connector 4;

[0034] There is a groove at the top of the conical gasket 9 that can fit the bottom of the conical support head 10. There is a through-hole for gas flow between the conical support head 10 and the first connecting pipe 2. The contact gasket 13 is located near the top inside the external thread pipe 14. The female connector 4 is connected to the male connector 1 through the external thread pipe 14. After the male connector 1 and the female connector 4 are connected, the bottom protrusion of the conical docking head 17 is snapped into the top groove of the conical sealing ring 11 to form an embedded and wrapped connection, increasing the anti-expansion property and sealing performance. All the sealing structures can be made of silicone.

[0035] At the position near the bottom of the inner surface of the male connector 1, convex rings 16 are fixedly connected. Installation grooves 8 are provided on the outer surface and the bottom of the conical sealing ring 11.

[0036] The positions of the two installation grooves 8 and the two convex rings 16 correspond to each other. After the conical sealing ring 11 is installed, the convex rings 16 are snapped into the inside of the installation grooves 8 to increase the sealing performance.

[0037] Anti-slip threads 3 are provided on the outer surface of the female connector 4. A plurality of card slots 7 are provided on the outer surfaces of the first connecting pipe 2 and the second connecting pipe 5. First sealing rings 6 are arranged inside the card slots 7.

[0038] The first sealing rings 6 are sleeved on the outer surfaces of the first connecting pipe 2 and the second connecting pipe 5 to increase the sealing performance of the connection with the carbon dioxide system delivery pipeline.

[0039] A placement groove 19 is provided on the outer surface of the conical docking head 17. An outer sealing ring 18 is arranged inside the placement groove 19.

[0040] The placement groove 19 is located at the position where the conical docking head 17 contacts the inner surface of the external thread pipe 14. The outer sealing ring 18 is sleeved on the non-conical position of the conical docking head 17 to increase the connection sealing performance.

[0041] The working principle of the joint sealing structure for the carbon dioxide refrigeration system provided by the present utility model is as follows:

[0042] First, divide the connector into a male connector 1 and a female connector 4. Then, place the conical gasket 9 at the bottommost part of the inner wall of the male connector 1. Next, insert the metal conical head 10 through the first connecting pipe 2 from the top of the male connector 1, and let the first connecting pipe 2 pass through the bottom end of the male connector 1 so that the bottom of the conical head 10 contacts the top of the conical gasket 9, which can seal the connection between the first connecting pipe 2 and the male connector 1. After that, place a conical sealing ring 11 in the conical groove above the conical head 10, and place a contact washer 13 at the top of the inner wall of the female connector 4. The use of embedded sealing can increase the sealing performance at the contact position between the conical docking head 17 and the conical head 10, and can increase the anti-expansion performance. Then, install the conical docking head 17 inside the female connector 4 through the second connecting pipe 5, and let the top end of the conical docking head 17 contact the contact washer 13. Finally, just connect the female connector 4 to the male connector 1 through the external threaded pipe 14 and make the conical docking head 17 fit tightly with the conical sealing ring 11. During actual use, use the conical sealing ring 11 to wrap the conical docking head 17 to increase the anti-expansion performance of the connection. After that, just connect the first connecting pipe 2 and the second connecting pipe 5 to the pipes that need to be connected to the carbon dioxide system respectively.

[0043] Compared with the related technology, the joint sealing structure for the carbon dioxide refrigeration system provided by the present utility model has the following beneficial effects:

[0044] To increase the stability of the joint sealing in the carbon dioxide system, first divide the connector into a male connector 1 and a female connector 4. Then, place the conical gasket 9 at the bottommost part of the inner wall of the male connector 1. Next, insert the metal conical head 10 through the first connecting pipe 2 from the top of the male connector 1, and let the first connecting pipe 2 pass through the bottom end of the male connector 1 so that the bottom of the conical head 10 contacts the top of the conical gasket 9, which can seal the connection between the first connecting pipe 2 and the male connector 1. After that, place a conical sealing ring 11 in the conical groove above the conical head 10, and place a contact washer 13 at the top of the inner wall of the female connector 4. The use of embedded sealing can increase the sealing performance at the contact position between the conical docking head 17 and the conical head 10, and can increase the anti-expansion performance. Then, install the conical docking head 17 inside the female connector 4 through the second connecting pipe 5, and let the top end of the conical docking head 17 contact the contact washer 13. Finally, just connect the female connector 4 to the male connector 1 through the external threaded pipe 14 and make the conical docking head 17 fit tightly with the conical sealing ring 11. Through this design, the embedded and wrapped conical sealing ring 11 and the conical docking head 17 cooperate with each other to increase the anti-expansion property of the connection, increase the sealing stability, and reduce the risk of leakage. Embodiment

[0045] Please refer to Figures 5 - 6 ,Figure 5 Schematic diagram of the structure of the second embodiment of the joint sealing structure for a carbon dioxide refrigeration system provided by the present utility model; Figure 6 Provided by the present utility model Figure 5 Enlarged view of the position B shown. Based on the joint sealing structure for a carbon dioxide refrigeration system provided by the first embodiment of the present application, the second embodiment of the present application proposes another joint sealing structure for a carbon dioxide refrigeration system. The second embodiment is merely a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0046] Specifically, the difference of the joint sealing structure for a carbon dioxide refrigeration system provided by the second embodiment of the present application is that a collar 29 is provided on the outer surface of the male connector 1, and connecting bolts 28 are installed on opposite sides of the outer surface of the collar 29 through connecting blocks 27. One end of each of the two connecting bolts 28 on the opposite side is installed with a sealing frame 25 through a bolt 26;

[0047] Holes for inserting the pipeline are provided on both sides of the sealing frame 25. The bolt 26 passes through the sealing frame 25 and is threadedly connected to the connecting bolt 28. The position and shape of the sealing frame 25 refer to Figure 5 .

[0048] A lid 21 is installed on the top of the sealing frame 25 through a sealing plug 20. A control box 24 and a handle 23 are respectively installed on the top of the lid 21. Carbon dioxide sensors 22 are installed near both sides of the top of the lid 21;

[0049] The monitoring end of the carbon dioxide sensor 22 is located below the lid 21, and can monitor the concentration of carbon dioxide inside the sealing frame 25. A battery and a data transceiver are installed inside the control box 24.

[0050] Compared with the related art, the joint sealing structure for a carbon dioxide refrigeration system provided by the present utility model has the following beneficial effects:

[0051] In order to monitor in real time whether there is a leak at the connection of the carbon dioxide system, a collar 29 with two connecting blocks 27 is installed on the outer surface of the male connector 1, and a connecting bolt 28 is installed on each connecting block 27. Then, the sealing frame 25 is connected through the bolt 26 and the other ends of the two connecting bolts 28. There are holes on both sides of the sealing frame 25 through which the pipeline can pass, facilitating the connection of the first connecting pipe 2 and the second connecting pipe 5 to the pipeline. Finally, only the lid 21 with the carbon dioxide sensor 22 needs to seal the top of the sealing frame 25 through the sealing plug 20. In actual use, if there is a leak at the connection, the gas will concentrate in the space inside the sealing frame 25. At this time, if the carbon dioxide sensor 22 monitors a change in the carbon dioxide concentration, it will immediately feed back the data to the terminal to remind the staff to repair. Through this design, it is possible to monitor in real time whether there is a leak at the pipeline connection, increasing the safety.

[0052] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A joint sealing structure for a carbon dioxide refrigeration system, characterized in that, Including: Male connector; Conical gasket, the conical gasket is arranged at the bottom of the inner wall of the male connector, a conical support head is arranged at the top of the conical gasket, a first connecting pipe is fixedly connected to the bottom end of the conical support head, a conical sealing ring is arranged at the top of the conical support head, and an internal thread ring is provided at a position near the top of the inner surface of the male connector; External thread pipe, the external thread pipe is threadedly connected to the position at the top inside the male connector, the top end of the external thread pipe is fixedly connected to a female connector, a contact gasket is arranged at the bottom of the inner wall of the female connector, a conical docking head is arranged at the bottom end of the contact gasket, a second connecting pipe is fixedly connected to the top end of the conical docking head, and a through hole through which the second connecting pipe can pass is provided at the top end of the female connector.

2. The joint sealing structure for a carbon dioxide refrigeration system according to claim 1, wherein, Convex rings are fixedly connected to positions near the bottom of the inner surface of the male connector, and installation grooves are provided on the outer surface and the bottom of the conical sealing ring.

3. The joint sealing structure for a carbon dioxide refrigeration system according to claim 1, characterized in that Anti-slip patterns are provided on the outer surface of the female connector, a plurality of clamping grooves are provided on the outer surfaces of the first connecting pipe and the second connecting pipe, and first sealing rings are arranged inside the clamping grooves.

4. The joint sealing structure for a carbon dioxide refrigeration system according to claim 1, characterized in that, A placement groove is provided on the outer surface of the conical docking head, and an external sealing ring is arranged inside the placement groove.

5. The joint sealing structure for a carbon dioxide refrigeration system according to claim 1, characterized in that, A collar is arranged on the outer surface of the male connector, connecting bolts are installed on opposite sides of the outer surface of the collar through connecting blocks, and a sealing frame is installed at one end of each of the two connecting bolts through bolts.

6. The joint sealing structure for a carbon dioxide refrigeration system according to claim 5, characterized in that, A lid is installed on the top of the sealing frame through a sealing plug, a control box and a handle are respectively installed on the top of the lid, and carbon dioxide sensors are installed at positions near both sides of the top of the lid.

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