Multi-opening core-pulling sealing helium leakage detection sealing tool
By designing a multi-port core-pulling sealing tooling for helium leak detection, the detection of helium leaks in compressors has been simplified and stabilized. This solves the problems of cumbersome detection and high false alarm rate in existing technologies, thereby improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2026-03-31
AI Technical Summary
Existing methods for detecting helium leaks in compressors are cumbersome, have a high false alarm rate, and affect product lifespan. Water detection and post-processing are time-consuming and labor-intensive.
A multi-port core-pulling sealing helium leak detection sealing fixture is designed, including a positioning base, a needle valve seat, and a core-pulling sealing head. Gas sealing is achieved through precise positioning and deformation of the sealing ring, simplifying the detection process.
It improved detection efficiency, reduced false positive rate, minimized damage to products, saved time and costs, and increased production efficiency.
Smart Images
Figure CN224066289U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor helium leakage detection technology, and more specifically, to a multi-port core-pulling sealing tool for detecting helium leakage. Background Technology
[0002] Air conditioner compressors are generally equipped with a four-way valve, which mainly acts as an intermediate station for refrigerant replacement in the cooling and heating modes of the air conditioner. Structurally, the upper end of the four-way valve is equipped with an exhaust pipe connector, and the lower end of the four-way valve is equipped with a condenser pipe connector, a return pipe connector, and a shut-off valve connector. The four pipe connectors are respectively connected to corresponding pipes for connecting to the compressor exhaust port, condenser, compressor suction port, and indoor unit.
[0003] The current method for detecting helium leaks in compressors is similar to the traditional method of patching a tire: filling the compressor with compressed air and then immersing it in water to observe for bubbles to determine if there is a leak. This method is not only cumbersome but also requires highly focused attention from the staff. Since the amount of compressed air leaking is relatively small and the bubbles in the water are not very obvious, it requires a strong subjective judgment, resulting in a relatively high rate of missed detections.
[0004] In addition, because the compressors being tested are submerged in water, the residual moisture on the surface and inside of the product needs to be removed later, which is labor-intensive and time-consuming. Furthermore, metals are prone to rust when submerged in water, which can affect the lifespan of the compressor to some extent.
[0005] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content
[0006] The purpose of this invention is to provide a multi-port core-pulling sealing helium leak detection sealing tool, which can reduce costs, is highly efficient, and stable.
[0007] This utility model provides a multi-port core-pulling sealing helium leak detection sealing fixture, including a positioning base, a needle valve seat, and a core-pulling sealing head. The positioning base is cuboid in shape, with an arc-shaped groove on its top surface and square grooves and square notches on both sides of the arc-shaped groove. The needle valve seat is cuboid in shape, with four through holes into which the core-pulling sealing head is inserted. The core-pulling sealing head includes a sealing head block, a rectangular sealing ring, a core-pulling needle sleeve, and a core-pulling needle. One end of the core-pulling needle is inserted into the core-pulling needle sleeve and protrudes from the other end of the core-pulling needle sleeve. The sealing head block is fitted onto the end of the core-pulling needle, and the rectangular sealing ring is fitted onto the side of the end of the core-pulling needle, with the rectangular sealing ring located between the sealing head block and the core-pulling needle sleeve.
[0008] Using the above technical solution, the side of the product under test (four-way valve) is placed in the arc-shaped groove, with three valve tubes extending from the square notch and the other valve tube extending from above the square notch. Four sealing heads are inserted into the four pipe openings of the product under test to block them, and rectangular sealing rings are pressed against the inner walls of the pipe openings. The tail of the core-pulling needle is connected to an external cylinder. Precise positioning of the product under test is achieved through a positioning base. The cylinder pulls the core-pulling needle, and under the action of force, the rectangular sealing ring, blocked by the sealing heads and compressed by the core-pulling needle sleeve, expands outward, squeezing the inner wall of the pipe of the product under test to achieve a seal. A specific medium (gas) is introduced. After the test is completed, the applied force is disconnected, the rectangular sealing ring returns to its original deformation and detaches from the seal, returning to its original state. The fixture can then be pushed out to remove the product under test.
[0009] Furthermore, the core-pulling sealing head also includes a circular sealing ring, which is sleeved on the side of the core-pulling needle; the core-pulling needle is inserted into the through hole, and the circular sealing ring is pressed against the inner wall of the through hole.
[0010] Furthermore, a connecting hole is provided at the tail of the core-pulling pin.
[0011] This utility model presents a multi-port core-pulling sealing helium leak detection sealing fixture. Its simple and compact design provides stable testing results, durability, high efficiency, and time savings, making it worthy of widespread application. It can perform multi-port sealing tests in one operation, solving the problem of leak detection in multi-port electronic expansion valves, improving production efficiency, and ensuring product quality. Attached Figure Description
[0012] Figure 1 A schematic diagram of the structure of the multi-port core-pulling sealing helium leak detection sealing tool provided in this embodiment of the utility model.
[0013] Figure 2 for Figure 1 A schematic diagram of the core-pulling sealing head of a multi-port core-pulling sealing helium leak detection sealing tool.
[0014] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the core-pulling sealing head of a multi-port core-pulling sealing helium leak detection sealing tool.
[0015] Figure 4 for Figure 1 A schematic diagram of the structure of a multi-port core-pulling sealing helium leak detection sealing fixture.
[0016] Figure 5 for Figure 1 A schematic diagram of the use of a multi-port core-pulling sealing helium leak detection sealing fixture.
[0017] The reference numerals and components involved in the accompanying drawings are shown below:
[0018] 100. Positioning base; 110. Arc-shaped groove; 120. Square groove
[0019] 130, square notch 200, needle valve seat 210, through hole
[0020] 300, Core-pulling sealing head; 310, Sealing head block; 320, Rectangular sealing ring.
[0021] 330, core-pulling pin sleeve; 340, core-pulling pin; 350, circular sealing ring.
[0022] 360°, 400mm connection hole, product under test Detailed Implementation
[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0024] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0025] Example 1
[0026] Figure 1 This is a schematic diagram of the structure of the multi-port core-pulling sealing helium leak detection sealing tooling provided in an embodiment of this utility model. Figure 2 for Figure 1 A schematic diagram of the core-pulling sealing head of a multi-port core-pulling sealing helium leak detection sealing tool. Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the core-pulling sealing head of a multi-port core-pulling sealing helium leak detection sealing tool. Figure 4 for Figure 1 A schematic diagram illustrating the structure of a multi-port core-pulling sealing helium leak detection sealing fixture. Figure 5 for Figure 1 A schematic diagram of the multi-port core-pulling sealing helium leak detection sealing fixture. Please refer to the diagram. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5The multi-port core-pulling sealing helium leak detection sealing fixture provided in this embodiment includes a positioning base 100, a needle valve seat 200, and a core-pulling sealing head 300. The positioning base 100 is cuboid in shape, with an arc-shaped groove 110 on its upper surface, and square grooves 120 and square notches 130 on both sides of the arc-shaped groove 110. The needle valve seat 200 is cuboid in shape, with four through holes 210 on its surface, into which the core-pulling sealing head 300 is inserted. 00; The core-pulling sealing head 300 includes a sealing head block 310, a rectangular sealing ring 320, a core-pulling needle sleeve 330, and a core-pulling needle 340; one end of the core-pulling needle 340 is inserted into the core-pulling needle sleeve 330 and protrudes from the other end of the core-pulling needle sleeve 330; the sealing head block 310 is sleeved on the end of the core-pulling needle 340, and the rectangular sealing ring 320 is sleeved on the side of the end of the core-pulling needle 340, and the rectangular sealing ring 320 is located between the sealing head block 310 and the core-pulling needle sleeve 330.
[0027] It should be noted that when using this utility model, the side of the product under test 400 (four-way valve) is placed in the arc-shaped groove 110, with three valve tubes extending from the square notch 130 and another valve tube extending from above the square notch 130; the product under test 400 has four corresponding sealing head blocks 310 inserted into the four tube openings, and the rectangular sealing ring 320 is pressed against the inner wall of the tube opening, connecting the tail of the core-pulling needle 340 to the external cylinder.
[0028] This invention achieves precise positioning of the product under test 400 through the positioning base 100. The cylinder pulls the core-pulling needle 340. Under the action of force, the rectangular sealing ring 320 is compressed and deformed by the sealing head blocking 310 and the core-pulling needle sleeve 330, and expands outward to squeeze the inner wall of the tube of the product under test 400 to achieve a seal. A specific medium (gas) is introduced. After the test is completed, the applied force is disconnected, the rectangular sealing ring 320 returns to its original deformation and breaks the seal, returning to its original state. The tooling can then be pushed out to remove the product under test 400.
[0029] Further reference Figure 1 , Figure 2 , Figure 3 The core-pulling sealing head 300 of this utility model also includes a circular sealing ring 350, which is sleeved on the side of the core-pulling needle 340; the core-pulling needle 340 is inserted into the through hole 210, and the circular sealing ring 350 is pressed against the inner wall of the through hole 210.
[0030] Further reference Figure 2 , Figure 3 A connecting hole 360 is provided at the tail of the core-pulling needle 340.
[0031] As can be seen from the above description, the advantages of this utility model are:
[0032] This utility model presents a multi-port core-pulling sealing helium leak detection sealing fixture. Its simple and compact design provides stable testing results, durability, high efficiency, and time savings, making it worthy of widespread application. It can perform multi-port sealing tests in one operation, solving the problem of leak detection in multi-port electronic expansion valves, improving production efficiency, and ensuring product quality.
[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A multi-port core-pulling sealing helium leak detection sealing tool, characterized in that, The utility model relates to a core-pulling sealing head, which comprises a positioning base (100), a needle valve seat (200) and the core-pulling sealing head (300). The positioning base (100) is cuboid, and an arc-shaped groove (110) is arranged on the upper surface of the positioning base (100), and square grooves (120) and square notches (130) are arranged on both sides of the arc-shaped groove (110) respectively. The needle valve seat (200) is cuboid, and four through holes (210) are arranged on the needle valve seat (200), and the core-pulling sealing head (300) is inserted into the through holes (210). The core-pulling sealing head (300) comprises a sealing head part barrier (310), a rectangular sealing ring (320), a core-pulling needle sleeve (330) and a core-pulling needle (340). One end of the core-pulling needle (340) is inserted into the core-pulling needle sleeve (330) and penetrates out from the other end of the core-pulling needle sleeve (330), the end part of the core-pulling needle (340) is sleeved with the sealing head part barrier (310), the rectangular sealing ring (320) is sleeved on the side surface of the end part of the core-pulling needle (340), and the rectangular sealing ring (320) is located between the sealing head part barrier (310) and the core-pulling needle sleeve (330).
2. The multi-port core-pulling sealed helium leak detection tooling of claim 1, wherein, The core-pulling sealing head (300) further comprises a circular sealing ring (350) sleeved on the side surface of the core-pulling needle (340). The core-pulling needle (340) is inserted into the through hole (210), and the circular sealing ring (350) is pressed against the inner wall of the through hole (210).
3. The multi-port core-pulling sealed helium leak detection tooling of claim 1, wherein, A connecting hole (360) is arranged at the tail part of the core-pulling needle (340).