Refrigerant pipe joint main body and plug-in pipe joint

Abstract

The utility model relates to the technical field of pipe joints, and discloses a refrigerant pipe joint body and a plug-in type pipe joint, the refrigerant pipe joint body comprises at least one set of plug-in sections for pipeline plug-in, and the inner wall of an inner cavity of each set of plug-in section is sequentially provided with a first step face, a second step face and a third step face which are adjacent in the pipeline pull-out direction; the inner diameter of the second step surface is larger than that of the first step surface, and the inner diameter of the third step surface is larger than or equal to that of the second step surface; the inserting section is provided with a first stop block which is inwards protruded out of the second step surface at the second step surface, and is also provided with a second stop block which is inwards protruded out of the second step surface at the junction of the second step surface and the third step surface; sealing ring containing grooves corresponding to the single sealing rings are formed in the positions, on the two opposite sides of the first check block, of the inserting section in the axial direction of the inserting section. The sealing performance of the pipe joint can be improved.

Description

Technical Field

[0001] This application relates to the technical field of pipe fittings, and in particular to a refrigerant pipe fitting body and an insert-type pipe fitting. Background Technology

[0002] In refrigeration systems, the connection of refrigerant pipes is a key link to ensure the efficient and stable operation of the system. As an important component connecting refrigerant pipes, the sealing performance of refrigerant pipe joints affects the reliability and safety of the system.

[0003] Currently, most refrigerant pipe fittings use a sealing ring structure to achieve a sealed connection. Referring to the patent document with publication number CN220957224U, a fitting body, a first sealing ring, and a retaining ring are disclosed. The first sealing ring and the retaining ring are both installed in the assembly cavity of the fitting body, and the first sealing ring and the retaining ring are distributed one by one along the axial direction of the fitting body.

[0004] However, during the operation of the refrigeration system, the refrigerant will generate high pressure inside the pipes. According to the above-mentioned technologies, when the pipe joint is under high pressure, the sealing ring will be forced to deform and shift under pressure, causing refrigerant leakage and posing a safety hazard. Utility Model Content

[0005] To improve the sealing performance of pipe fittings, this application provides a refrigerant pipe fitting body and an insertion-type pipe fitting.

[0006] In a first aspect, this application provides a refrigerant pipe fitting body, which adopts the following technical solution:

[0007] A refrigerant pipe connector body includes: at least one set of insertion sections for pipe insertion, wherein the inner wall of the inner cavity of each set of insertion sections has adjacent first step surface, second step surface and third step surface in sequence along the pipe pull-out direction, the inner diameter of the second step surface is larger than the inner diameter of the first step surface, and the inner diameter of the third step surface is larger than or equal to the inner diameter of the second step surface; the insertion section is provided with a first stop block protruding inward from the second step surface at the second step surface, and the insertion section is also provided with a second stop block protruding inward from the second step surface at the junction of the second step surface and the third step surface, such that the insertion section forms a sealing ring receiving groove corresponding to a single sealing ring on both sides of the first stop block along its own axial direction.

[0008] By adopting the above technical solution, the setting of the first and second blocks enhances the fixing effect of the sealing ring, prevents the sealing ring from shifting due to pressure deformation, and thus reduces the risk of refrigerant leakage.

[0009] Optionally, the second stop has an inclined surface that gradually slopes toward the central axis of the insertion section along the pipe insertion direction.

[0010] Optionally, the insertion segment has a retaining edge protruding from the end of the first stepped surface away from the second stepped surface, for the insertion of the pipe end to abut against.

[0011] By adopting the above technical solution, the retaining edge prevents the pipe from being inserted too deeply during insertion, thus playing a limiting role. At the same time, the retaining edge can also abut against the end of the pipe, increasing the stability of the contact and helping to improve the sealing effect.

[0012] Optionally, the first stop and / or the second stop are integrally formed with the plug segment.

[0013] By adopting the above technical solution, the one-piece molding design simplifies the manufacturing process and reduces production costs. At the same time, it ensures the connection strength between the stop block and the plug section, improving the overall stability and durability of the joint.

[0014] Optionally, both the first stop and the second stop are annular and coaxial with the plug segment.

[0015] By adopting the above technical solution, the annular stop can ensure that the sealing ring is subjected to uniform force, thereby improving the sealing effect. At the same time, the annular stop can also provide a larger contact area, enhancing the connection strength of the joint.

[0016] Optionally, both the first stop and the second stop have a break and are capable of elastic deformation. The inner wall of the insertion section has a mounting groove for the first stop and the second stop to be inserted. Both the first stop and the second stop are deformed at the break to reduce their diameter. After the diameter is reduced, the first stop and the second stop are inserted into the corresponding mounting groove and then reset.

[0017] By adopting the above technical solution, the break design allows the stop block to undergo elastic deformation, facilitating diameter reduction during installation and enabling it to snap into the corresponding mounting groove. Under high pressure, the stop block may undergo slight deformation; disassembly of the stop block facilitates subsequent replacement of local parts and promotes the reuse of the pipe fitting body.

[0018] Secondly, this application provides an insertion-type pipe fitting, which adopts the following technical solution:

[0019] An insert-type pipe fitting includes: a refrigerant pipe fitting body as described above, and further includes a sealing ring, a clamp, and an anti-displacement seat; the sealing ring corresponds one-to-one with the sealing ring receiving groove and is snapped into the corresponding sealing ring receiving groove; the clamp is elastic and has at least one clamp abutting against the third step surface for clamping the inserted pipe; the anti-displacement seat is threadedly connected to the insertion section for clamping the clamp between the second stop and the anti-displacement seat.

[0020] Optionally, the clamp includes an abutment ring and locking teeth; the outer periphery of the abutment ring is opposite to the third step surface; the locking teeth are connected to the inner periphery of the abutment ring and are distributed at intervals along the circumference of the abutment ring, and the locking teeth are inclined towards the central axis of the insertion section along the pipe insertion direction.

[0021] By adopting the above technical solution, the abutment ring is used to face the third step surface and provide support, while the locking teeth are distributed at intervals and inclined along the circumference of the abutment ring, which can more effectively clamp the pipe and prevent it from loosening.

[0022] Optionally, the abutting ring in the clamp closest to the second stop abuts against the side of the second stop away from the first stop.

[0023] By adopting the above technical solution, the clamp and the second stop block are abutted together, making the pipe joint structure more compact and further enhancing the stability and sealing of the pipe joint.

[0024] Optionally, the clamps are multiple and distributed along the axial direction of the insertion segment, and an isolation seat abuts between the abutting rings of two adjacent clamps.

[0025] By adopting the above technical solution, the distributed design of multiple clamps provides a more uniform clamping force, enhancing the connection strength and sealing performance of the joint. The isolation seat prevents direct contact and wear between adjacent clamps, extending the service life of the joint.

[0026] In summary, this application includes at least one of the following beneficial effects:

[0027] 1. By setting three stepped surfaces in the insertion section, and forming a sealing ring receiving groove with the first and second stops, the sealing ring is limited, effectively preventing the sealing ring from being squeezed, deformed and displaced under high pressure.

[0028] 2. The sealing ring is closer to the inner end of the pipe insertion than the clamp, so that the material in the pipe is less likely to leak to the clamp and cause it to become rigid, thus improving the stability of the pipe joint;

[0029] 3. The clamp is supported by a second stop to improve the compactness of the pipe joint structure. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0031] Figure 2 yes Figure 1 Cross-sectional view at point AA;

[0032] Figure 3This is a schematic diagram of the structure of another type of pipe connector body according to an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the structure of another style of pipe connector body according to an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the structure of another style of pipe connector body according to an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this application;

[0036] Figure 7 This is a schematic diagram of the structure of the first stop block in Embodiment 2 of this application;

[0037] Figure 8 This is a structural schematic diagram of Embodiment 3 of this application;

[0038] Figure 9 yes Figure 8 Enlarged structural diagram at point B;

[0039] Figure 10 This is an exploded structural diagram of the clamp, isolation seat, and anti-shift seat in Embodiment 3 of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Insertion section; 2. First step surface; 3. Second step surface; 4. Third step surface; 5. First stop block; 6. Second stop block; 7. Sealing ring receiving groove; 8. Inclined surface; 9. Edge; 10. Break; 11. Mounting groove; 12. Sealing ring; 13. Clamp; 131. Abutment ring; 132. Clamping tooth; 14. Anti-slip seat; 15. Isolation seat. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0042] Example 1:

[0043] This application discloses a refrigerant pipe connector body. (Refer to...) Figure 1 The refrigerant pipe connector body includes at least one set of plug sections 1 for pipe insertion, and the pipe is coaxial with the plug section 1 when inserted into the inner cavity of the plug section 1.

[0044] Reference Figure 2Specifically, the inner wall of the inner cavity of each set of insertion sections 1 is formed with a first step surface 2, a second step surface 3, and a third step surface 4 sequentially adjacent to each other along the pipe pulling direction. The first step surface 2, the second step surface 3, and the third step surface 4 all extend along a circular trajectory coaxial with the insertion section 1. The inner diameter of the first step surface 2 is consistent with the outer diameter of the pipe into which the pipe connector body is inserted. The inner diameter of the second step surface 3 is larger than that of the first step surface 2. The inner diameter of the third step surface 4 is greater than or equal to the inner diameter of the second step surface 3. In this embodiment, the inner diameter of the third step surface 4 is larger than that of the second step surface 3.

[0045] Furthermore, the insertion segment 1 has a first stop 5 protruding inward on the second step surface 3, and at least one first stop 5 is provided along the circumference of the insertion segment 1. In this embodiment, the number of first stop 5 is one; in other embodiments, the number of first stop 5 can be two or three, and multiple first stop 5 are distributed along the axial direction of the insertion segment 1.

[0046] Meanwhile, at the junction of the second step surface 3 and the third step surface 4, the plug section 1 has a second stop 6 protruding inward. The first stop 5 and the second stop 6 are both annular and coaxial with the plug section 1. The inner diameter of the first stop 5 and the second stop 6 is smaller than the inner diameter of the second step surface 3 and larger than the inner diameter of the first step surface 2. The inner diameter of the first stop 5 and the second stop 6 is larger than the outer diameter of the pipe to be plugged into the plug section 1.

[0047] Reference Figure 2 In this embodiment, the connecting surface between the first step surface 2 and the second step surface 3, the second step surface 3, and the side of the first stop 5 facing away from the second stop 6 together form a sealing ring receiving groove 7. The side of the first stop 5 facing the second stop 6, the side of the second stop 6 facing the first stop 5, and the second step surface 3 together form a sealing ring receiving groove 7. In embodiments with multiple first stops 5, the opposing sides of two adjacent first stops 5 and the second step surface 3 located between two adjacent first stops 5 also together form a sealing ring receiving groove 7. Each sealing ring receiving groove 7 can only accommodate a single sealing ring, thus isolating the various sealing rings sealing the pipe on the pipe joint, thereby preventing excessive displacement of the sealing ring due to the restriction of the groove wall of the sealing ring receiving groove 7 when it is under pressure.

[0048] The inner circumference of the second stop 6 is set as an inclined surface 8, and the inclined surface 8 is inclined in a direction that gradually tilts towards the central axis of the insertion section 1 along the pipe insertion direction.

[0049] Furthermore, in this embodiment, both the first stop block 5 and the second stop block 6 are integrally formed with the plug section 1.

[0050] Furthermore, in this embodiment, the insertion segment 1 has a retaining flange 9 protruding inward at the end of the first step surface 2 away from the second step surface 3. The retaining flange 9 is annular and coaxial with the insertion segment 1, and its inner diameter is smaller than that of the first step surface 2. When the pipe is inserted into the insertion segment 1, the end of the pipe abuts against the retaining flange 9 to limit the insertion depth of the pipe.

[0051] In addition, regarding the number and distribution of plug-in segments 1, refer to Figure 2 The plug segment 1 can have two sets, and the two sets of plug segments 1 can be coaxially arranged and symmetrically arranged with the retaining edge 9 as the center; refer to Figure 3 The plug segment 1 can have two sets, and the two sets of plug segments 1 can be arranged with their axes perpendicular to each other; refer to Figure 4 The plug segment 1 can have two sets, and the two sets of plug segments 1 can be configured with different inner diameters; refer to Figure 5 , plug segment 1 can have only one set.

[0052] The implementation principle of a refrigerant pipe connector body in this application embodiment is as follows: a sealing ring receiving groove 7 for accommodating a single sealing ring is separated by the first stop 5 and the second stop 6 to limit the sealing ring.

[0053] Example 2:

[0054] The difference between this embodiment and Embodiment 1 is that the first block 5 and the second block 6 are set in different ways.

[0055] Specifically, refer to Figure 6 and Figure 7 The first stop block 5 and the second stop block 6 are detachably connected to the plug-in section 1. Both the first stop block 5 and the second stop block 6 are annular in shape. The inner wall of the plug-in section 1 is provided with a mounting groove 11 for the first stop block 5 and the second stop block 6 to be inserted. The mounting groove 11 extends in annular shape along the circumference of the plug-in section 1, and the inner diameter of the bottom of the mounting groove 11 is larger than the outer diameter of the corresponding first stop block 5 and the second stop block 6.

[0056] It should be noted that in this embodiment, both the first stop 5 and the second stop 6 are made of a material capable of elastic deformation, such as spring steel. Both the first stop 5 and the second stop 6 have a break 10, which continuously cuts off the first stop 5 and the second stop 6 along their circumference, allowing them to undergo elastic deformation at the break 10 to reduce their diameter. This allows the reduced-diameter first stop 5 and the second stop 6 to first move to align with their corresponding mounting slots 11, and then reset and snap into the corresponding mounting slots 11 to complete the installation.

[0057] Reference Figure 6 and Figure 7Specifically, in this embodiment, taking the first stop block 5 as an example, the two ends of the reset first stop block 5 at the break 10 abut against each other. During the process of the first stop block 5 being inserted into the mounting groove 11, the two ends of the first stop block 5 at the break 10 are first misaligned and then squeezed and deformed to reduce the diameter. Then the first stop block 5 is gradually inserted into the corresponding mounting groove 11 and then gradually reset.

[0058] In other embodiments, taking the first stop 5 as an example, the reset first stop 5 has a gap between the two ends at the break 10. During the process of the first stop 5 being inserted into the mounting groove 11, the two ends of the first stop 5 at the break 10 are squeezed and moved towards each other to reduce the diameter. Then the first stop 5 is inserted into the corresponding mounting groove 11 and reset.

[0059] Example 3:

[0060] This application discloses an insert-type pipe fitting, referring to... Figure 8 It includes the refrigerant pipe connector body mentioned in any of the embodiments of the first or second embodiment, and also includes a sealing ring 12, a clamp 13 and an anti-shift seat 14 installed in the plug section 1.

[0061] Reference Figure 8 and Figure 9 The sealing ring 12 is made of elastic rubber. The number of sealing rings 12 corresponds one-to-one with the number of sealing ring receiving grooves 7 in the insertion section 1. The sealing ring 12 is coaxially inserted into the corresponding sealing ring receiving groove 7, and the inner diameter of the sealing ring 12 is smaller than the inner diameter of the first stop 5 and the second stop 6.

[0062] Reference Figure 9 and Figure 10 The device has at least one clamp 13, and in this embodiment, it has two clamps 13, which are distributed along the axial direction of the insertion section 1. Each clamp 13 includes an abutment ring 131 and a locking tooth 132. The abutment ring 131 is annular, and its outer diameter is approximately equal to the inner diameter of the third step surface 4. A gap exists between the outer circumference of the abutment ring 131 and the third step surface 4 to allow the clamp 13 to be inserted into the insertion section 1. Multiple locking teeth 132 are integrally formed on the inner circumference of the abutment section and distributed along the inner circumference of the abutment ring 131. The locking teeth 132 are plate-shaped, and the connection point between the locking teeth 132 and the abutment ring 131 can undergo elastic deformation. The plane of the locking teeth 132 gradually extends towards the central axis of the insertion section 1 along the pipe insertion direction. When the pipe is inserted into the pipe joint, it passes through the space enclosed by multiple locking teeth 132. The locking teeth 132 guide the insertion of the pipe and make it difficult to pull out.

[0063] Among them, the clamp 13 closest to the second stop 6 abuts against the ring 131 on the side of the second stop 6 away from the first stop 5. At the same time, the clamp teeth 132 of the clamp 13 are opposite to the inclined surface 8 of the second stop 6. There is a movable gap between the clamp teeth 132 and the inclined surface 8, so that the clamp teeth 132 can be bent relative to the abutting ring 131 towards the inclined surface 8. The inclined surface 8 restricts the bending angle of the clamp teeth 132 and prevents the clamp teeth 132 from being over-deformed.

[0064] Reference Figure 9 and Figure 10 Furthermore, an isolation seat 15 is abutted between two adjacent clamps 13. The isolation seat 15 is made of rigid material and is ring-shaped. The isolation seat 15 abuts between the abutting rings 131 between two adjacent clamps 13 to isolate the two adjacent clamps 13 by a distance and prevent the clamping teeth 132 of the two adjacent clamps 13 from interfering with each other.

[0065] Reference Figure 8 and Figure 10 The anti-shift seat 14 is coaxially threaded to the end of the third step surface 4 away from the second stop 6, and is used to limit the clamp 13 between the second stop 6 and the anti-shift seat 14, preventing the clamp 13 from leaving the insertion section 1 in the direction of pipe pull-out, so as to improve the stability of the clamp 13.

[0066] During the process of inserting the pipe into the splice section 1, the anti-slip seat 14, the clamp 13 and the sealing ring 12 are passed through in sequence. Then the end of the pipe abuts against the outer edge, the sealing ring 12 hugs the outer wall of the pipe, and at the same time the clamp teeth 132 of the clamp 13 abut against the outer wall of the pipe to make the pipe difficult to pull out.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A refrigerant pipe connector body, characterized in that, The application relates to a pipe joint body, which comprises the following parts: at least one set of pipe joint segments (1) for pipe insertion, the inner wall of the pipe joint segment (1) is provided with adjacent first, second and third step surfaces (2, 3, 4) in sequence along the pipe pulling direction, the inner diameter of the second step surface (3) is larger than that of the first step surface (2), and the inner diameter of the third step surface (4) is larger than or equal to that of the second step surface (3); the pipe joint segment (1) is provided with a first stop block (5) which protrudes inwardly from the second step surface (3) at the second step surface (3), and the pipe joint segment (1) is further provided with a second stop block (6) which protrudes inwardly from the second step surface (3) at the joint between the second step surface (3) and the third step surface (4), so that the pipe joint segment (1) is formed with a sealing ring accommodating groove (7) corresponding to a single sealing ring on the opposite sides of the first stop block (5) along the axial direction of the pipe joint segment (1).

2. A refrigerant tube joint body according to claim 1, characterized by: The second stop block (6) is provided with an inclined surface (8) which gradually inclines towards the central axis of the pipe joint segment (1) along the pipe insertion direction.

3. A refrigerant tube joint body according to claim 1, wherein: The pipe joint segment (1) is provided with a stop edge (9) which protrudes from one end of the pipe joint segment (1) away from the second step surface (3) and is used for abutting against the end of the inserted pipe.

4. A refrigerant tube joint body according to claim 1, wherein: The first stop block (5) and / or the second stop block (6) are integrally formed with the pipe joint segment (1).

5. A refrigerant tube joint body according to claim 1, wherein: The first stop block (5) and the second stop block (6) are both annular and coaxial with the pipe joint segment (1).

6. A refrigerant tube joint body according to claim 5, wherein: The first stop block (5) and the second stop block (6) are both provided with a fracture (10) and can be elastically deformed, the inner wall of the pipe joint segment (1) is provided with a mounting groove (11) for embedding the first stop block (5) and the second stop block (6), the first stop block (5) and the second stop block (6) are both deformed at the fracture (10) to be reduced in diameter, and after the first stop block (5) and the second stop block (6) are clamped into the corresponding mounting groove (11), the first stop block (5) and the second stop block (6) are reset.

7. A plug-in pipe joint, characterized by: The pipe joint body comprises the pipe joint body of any one of the above 1-6, further comprising a sealing ring (12), a clamp (13) and a stop seat (14); the sealing ring (12) corresponds to the sealing ring accommodating groove (7) and is clamped into the corresponding sealing ring accommodating groove (7); the clamp (13) is elastic and has at least one, the clamp (13) is relative to the third step surface (4) and is used for clamping the inserted pipe; the stop seat (14) is screw-connected in the pipe joint segment (1) and is used for clamping the clamp (13) between the second stop block (6) and the stop seat (14).

8. An insert pipe joint according to claim 7, characterised in that: The clamp (13) comprises an abutting ring (131) and a clamping tooth (132); the outer periphery of the abutting ring (131) is opposite to the third step surface (4); the clamping tooth (132) is connected to the inner periphery of the abutting ring (131) and is distributed in multiple along the circumferential direction of the abutting ring (131), and the clamping tooth (132) inclines towards the central axis of the pipe joint segment (1) along the pipe insertion direction.

9. An insert pipe joint according to claim 8, characterised in that: The abutting ring (131) in the clamp (13) closest to the second stop block (6) abuts against a side of the second stop block (6) facing away from the first stop block (5).

10. An insert pipe joint according to claim 8, characterized in that: The clamp (13) has a plurality of clamps (13) distributed along the axial direction of the plug-in section (1), and the abutting rings (131) of adjacent two clamps (13) abut against the isolation seat (15).

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