General sealing cap with large diameter and small diameter

Abstract

The utility model discloses a general sealing cap for large and small diameters, and aims to provide a general sealing cap for large and small diameters, which is suitable for pipe heads with different sizes. The sealing cap comprises a sealing cap shell, a fixing ring and a sealing ring, the sealing cap shell is provided with a sealing cavity and a detection cavity, the sealing cavity is communicated with the detection cavity, one end of the fixing ring is arranged in the sealing cavity and is in threaded connection with the sealing cap shell, the other end of the fixing ring is provided with a fastening assembly, an extrusion ring is arranged in the sealing cavity, and the extrusion ring is connected with the detection cavity. The sealing ring is arranged in the sealing cavity, one end of the sealing ring is in contact with the extrusion ring, and the other end of the sealing ring is in contact with the fixing ring. The utility model has the beneficial effects that the device is suitable for pipe heads with different sizes, can be used for connecting a fixing ring and a pipeline, can protect the pipeline, can improve the sealing performance, is convenient for observing the movement of the ejector pin, and can be used for fixing the telescopic sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field related to air conditioning technology, in particular to a universal sealing cap with large and small diameters. Background Art

[0002] Air conditioner evaporators are constructed from a set of U-shaped tubes threaded through fins, expanded, and welded. During the production process, they undergo leak testing and containment of protective gas. Therefore, a sealing cap is installed at the outlet of the air conditioner evaporator to monitor the airtightness of the evaporator. Existing caps are mostly fixed with screw threads that connect to copper tubes. In practice, copper tubes vary in size, requiring the production of caps of varying sizes. These caps are not universally compatible, and if a matching cap is lost during use, a replacement cap of the matching size must be found for inspection, which can be inconvenient.

[0003] Chinese Patent Authorization Publication No. CN204879261U, published on December 16, 2015, discloses a pressure warning cap and air conditioner. The cap includes a base, a cavity extending through the base, and an elastic ring disposed within the cavity, with its edge molded into the base. A shortcoming of this utility model is that the cap has a fixed opening, making it incompatible with pipe heads of varying sizes. Utility Model Content

[0004] The utility model aims to overcome the deficiency of the prior art in that the pipe heads of different sizes are not universal, and provides a universal sealing cap with large and small diameters applicable to the pipe heads of different sizes.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A universal sealing cap with large and small diameters includes a sealing cap shell, a fixing ring and a sealing ring. The sealing cap shell is provided with a sealing cavity and a detection cavity, the sealing cavity is communicated with the detection cavity, one end of the fixing ring is placed in the sealing cavity and is threadedly connected to the sealing cap shell, the other end of the fixing ring is installed with a fastening assembly, an extrusion ring is installed in the sealing cavity, the sealing ring is placed in the sealing cavity, one end of the sealing ring is in contact with the extrusion ring, and the other end of the sealing ring is in contact with the fixing ring.

[0007] The sealing cap shell is used to detect air tightness. When it is necessary to apply different sizes of tube heads, first fix the fixing ring on the tube head through the fastening assembly. The fastening assembly can fix the fixing ring on tube heads of different sizes, and then thread the outer side of one end of the fixing ring to the inner wall of the sealing cavity of the sealing cap shell. When it is necessary to detect air tightness, rotate the sealing cap shell on the fixing ring. The rotation of the sealing cap shell can increase the length of the fixing ring in the sealing cap shell. The end face of the fixing ring and the extrusion ring in the detection cavity squeeze the sealing ring between the two. The sealing ring is made of elastic material and deforms under extrusion. The sealing ring fits with the outer side surface of the tube head to ensure that the sealing cap shell and the tube head are sealed. Then the air tightness is detected through the detection cavity, thereby achieving the purpose of being applicable to tube heads of different sizes.

[0008] Preferably, a fastening assembly is mounted on both sides of the fixing ring, the fastening assembly comprising a screw and a screw block. One end of the screw passes through the fixing ring and is positioned within the fixing ring. The screw is threadedly connected to the fixing ring, and the other end of the screw is connected to the screw block. A fastening assembly is mounted on both sides of the fixing ring to ensure a reliable connection between the fixing ring and the pipeline. One end of the screw of the fastening assembly passes through the fixing ring and is positioned within the fixing ring. Rotating the screw block drives the screw to rotate. Rotation of the screw increases the length of the screw within the fixing ring, thereby contacting pipelines of different sizes, thereby completing the fixation of the fixing ring. This design allows the fixing ring to be connected to the pipeline.

[0009] Preferably, an extrusion block is mounted on one end of the screw rod positioned within the retaining ring. Direct contact with the pipe at one end of the screw rod could easily damage the pipe. Therefore, an extrusion block is mounted on the end of the screw rod positioned within the retaining ring. One side of the extrusion block is in contact with the pipe. The extrusion block is made of an elastic material that can adapt to pipes of varying diameters, ensuring that the pipe is not damaged when the retaining ring is connected to the pipe. This design protects the pipe.

[0010] Preferably, a contact ring is mounted on the inner wall of the sealing ring. When the end face of the fixed ring and the extrusion ring squeeze the sealing ring, in order to ensure the sealing of the connection with the pipeline, the contact ring is mounted on the sealing ring. The contact ring first contacts the pipeline and is continuously squeezed during the subsequent extrusion process. The contact ring and the pipeline are in contact, which strengthens the sealing effect. This design can improve the sealing performance.

[0011] Preferably, an observation chamber is provided in the cap shell, one side of the observation chamber is connected to the detection chamber, and the other side of the observation chamber is connected to the sealing chamber. A telescopic sleeve is provided in the detection chamber, and the telescopic sleeve is in contact with the inner wall of the detection chamber. A thimble is provided on the side of the telescopic sleeve facing the observation chamber, and one end of the thimble is connected to the observation chamber, and the other end of the thimble corresponds to the observation chamber. The detection chamber opening of the cap shell is connected to the pipeline, and a telescopic sleeve is installed in the detection chamber, and the telescopic sleeve is in contact with the inner wall of the cap shell. The telescopic sleeve divides the detection chamber of the cap assembly into two parts. The telescopic sleeve is made of elastic material, and the thimble moves by the expansion and contraction of the telescopic sleeve. When the pressure on the detection side facing the pipeline increases, the pressure squeezes the telescopic sleeve to deform, and drives the thimble to move toward the observation chamber. The thimble extends in the observation chamber, making it easy to observe the air tightness of the pipeline during installation. When the pipeline leaks, the pressure in the detection chamber will not increase, and the telescopic sleeve will not move, so the thimble movement will not be observed. This design makes it easy to observe the movement of the thimble.

[0012] Preferably, a buckling plate is provided on the side of the telescopic sleeve facing the sealing cavity, the buckling plate is placed inside the telescopic sleeve, the outer side of the buckling plate is in contact with the inner wall of the telescopic sleeve, and the buckling plate is provided with a vent. In order to divide the detection cavity into two cavities, the telescopic sleeve needs to be tightly connected to the inner wall of the sealing cap shell. Therefore, a buckling plate is installed in the telescopic sleeve, and the buckling plate squeezes the side of the telescopic sleeve to fit the inner wall of the detection cavity, ensuring a tight connection between the telescopic sleeve and the sealing cap shell. A vent is provided on the buckling plate to ensure that air pressure can act on the telescopic sleeve, thereby pushing the telescopic sleeve to deform. Such a design can fix the telescopic sleeve.

[0013] The beneficial effects of the utility model are: applicable to pipe heads of different sizes, can connect the fixing ring and the pipeline, can protect the pipeline, can improve the sealing performance, can facilitate the observation of the movement of the ejector pin, and can fix the telescopic sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 yes Figure 1 sectional view of

[0016] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle fixing ring.

[0017] In the figure: 1. Cap shell; 11. Sealing chamber; 12. Detection chamber; 13. Extrusion ring; 14. Observation chamber; 2. Fixing ring; 3. Sealing ring; 31. Contact ring; 4. Fastening assembly; 41. Screw; 42. Screw block; 43. Extrusion block; 5. Telescopic sleeve; 51. Ejector pin; 6. Pressing plate; 61. Vent. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 、 Figure 2 In the embodiment shown, a sealing cap with universal diameters includes a sealing cap shell 1, a fixing ring 2 and a sealing ring 3. The sealing cap shell 1 is provided with a sealing cavity 11 and a detection cavity 12. The sealing cavity 11 is communicated with the detection cavity 12. One end of the fixing ring 2 is placed in the sealing cavity 11 and is threadedly connected to the sealing cap shell 1. The other end of the fixing ring 2 is installed with a fastening assembly 4. An extrusion ring 13 is installed in the sealing cavity 11. The sealing ring 3 is placed in the sealing cavity 11. One end of the sealing ring 3 is in contact with the extrusion ring 13, and the other end of the sealing ring 3 is in contact with the fixing ring 2.

[0020] like Figure 3 As shown, fastening assemblies 4 are mounted on both sides of the retaining ring 2. These assemblies include a screw 41 and a screw block 42. One end of the screw 41 passes through the retaining ring 2 and is positioned within the retaining ring 2. The screw 41 is threadedly connected to the retaining ring 2, and the other end of the screw 41 is connected to the screw block 42. An extrusion block 43 is mounted on the end of the screw 41 positioned within the retaining ring 2. A contact ring 31 is mounted on the inner wall of the sealing ring 3.

[0021] An observation chamber 14 is provided in the cap shell 1, one side of the observation chamber 14 is connected to the detection chamber 12, and the other side of the observation chamber 14 is connected to the sealing chamber 11. A telescopic sleeve 5 is provided in the detection chamber 12, and the telescopic sleeve 5 is in contact with the inner wall of the detection chamber 12. A pin 51 is provided on the side of the telescopic sleeve 5 facing the observation chamber 14, one end of the pin 51 is connected to the observation chamber 14, and the other end of the pin 51 corresponds to the observation chamber 14.

[0022] A buckling plate 6 is provided on the side of the telescopic sleeve 5 facing the sealing cavity 11 . The buckling plate 6 is placed in the telescopic sleeve 5 . The outer side of the buckling plate 6 fits with the inner wall of the telescopic sleeve 5 . A vent hole 61 is provided on the buckling plate 6 .

[0023] During installation, first put the fixing ring 2 on the pipe head, and then simultaneously rotate the screw block 42 to drive the screw 41 to extend inside the fixing ring 2 until the extrusion block 43 at the lower end of the screw 41 contacts the side of the pipe, and the fixing ring 2 is fixed to the pipe. After the fixing ring 2 is installed, the closure cap housing 1 is threadedly connected to the fixing ring 2, and the fixing ring 2 is driven to extend inside the sealing cavity 11 by rotating the closure cap housing 1 until it contacts the sealing ring 3. At this time, the pipe end is disposed in the sealing cavity 11 and corresponds to the sealing ring 3. As the closure cap housing 1 rotates on the fixing ring 2, the end face of the fixing ring 2 and the extrusion ring 13 gradually approach each other, thereby squeezing the sealing ring 3 between the two to deform. The deformed sealing ring 3 will drive the contact ring 31 to approach the pipe until it is sealed and fits with the pipe, realizing a sealed connection between the closure cap housing 1 and the pipe.

[0024] During testing, if there is no leakage in the pipeline, the pipeline releases gas, and the air pressure in the detection chamber 12 increases. The air pressure causes the telescopic sleeve 5 to deform, and the deformed telescopic sleeve 5 causes the ejector pin 51 to move. The ejector pin 51 moves into the observation chamber 14, allowing the user to observe the status of the ejector pin 51. If there is a leakage in the pipeline, the telescopic sleeve 5 will not deform to cause the ejector pin 51 to move, thereby determining whether there is a leakage in the pipeline.

Claims

1. A universal sealing cap for large and small diameters, characterized by: The invention comprises a sealing cap shell (1), a fixing ring (2) and a sealing ring (3), wherein the sealing cap shell (1) is provided with a sealing cavity (11) and a detection cavity (12), wherein the sealing cavity (11) is communicated with the detection cavity (12), one end of the fixing ring (2) is placed in the sealing cavity (11) and is threadedly connected to the sealing cap shell (1), the other end of the fixing ring (2) is installed with a fastening assembly (4), an extrusion ring (13) is installed in the sealing cavity (11), the sealing ring (3) is placed in the sealing cavity (11), one end of the sealing ring (3) is in contact with the extrusion ring (13), and the other end of the sealing ring (3) is in contact with the fixing ring (2).

2. A universal sealing cap for large and small diameters according to claim 1, characterized in that: A fastening assembly (4) is installed on both sides of the fixing ring (2). The fastening assembly (4) includes a screw (41) and a screw block (42). One end of the screw (41) passes through the fixing ring (2) and is placed inside the fixing ring (2). The screw (41) is threadedly connected to the fixing ring (2), and the other end of the screw (41) is connected to the screw block (42).

3. A universal sealing cap for large and small diameters according to claim 2, characterized in that: An extrusion block (43) is installed at one end of the screw (41) placed in the fixing ring (2).

4. The universal sealing cap for large and small diameters according to claim 1, characterized in that: A contact ring (31) is mounted on the inner wall of the sealing ring (3).

5. The universal sealing cap for large and small diameters according to claim 1, characterized in that: An observation chamber (14) is provided in the cap shell (1), one side of the observation chamber (14) is communicated with the detection chamber (12), and the other side of the observation chamber (14) is communicated with the sealing chamber (11). A telescopic sleeve (5) is provided in the detection chamber (12), and the telescopic sleeve (5) is in contact with the inner wall of the detection chamber (12). A thimble (51) is provided on the side of the telescopic sleeve (5) facing the observation chamber (14), one end of the thimble (51) is connected to the observation chamber (14), and the other end of the thimble (51) corresponds to the observation chamber (14).

6. The universal sealing cap for large and small diameters according to claim 5, characterized in that: A buckling plate (6) is provided on the side of the telescopic sleeve (5) facing the sealing cavity (11). The buckling plate (6) is placed in the telescopic sleeve (5). The outer side surface of the buckling plate (6) is in contact with the inner wall of the telescopic sleeve (5). A vent hole (61) is provided on the buckling plate (6).

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