A quick inflation fixture for an inflation valve

Abstract

This utility model discloses a quick inflation fixture for an inflation valve, comprising: a connecting body with a docking cavity at its top for inserting an inflation valve from an air regulating pipe, and an inflation port at its bottom, the inflation port and the docking cavity being connected by an air inlet channel; a push rod for opening the air inlet of the inflation valve, the push rod being slidably connected to the connecting body, and a compression spring between the push rod and the connecting body; and a piston for driving the push rod to slide relative to the connecting body, the connecting body having a piston cavity, and the piston being slidably disposed within the piston cavity; wherein, the connecting body has an isolation cavity. This utility model enables inflation by opening the inflation valve when an inflation device is connected to the inflation valve, and reduces the risk of the inflation operation affecting the stability of the inflation valve's open state and the risk of pneumatic drive operation affecting inflation accuracy.

Description

Technical Field

[0001] This utility model relates to the field of inflation fixtures, specifically to a rapid inflation fixture for an inflation valve used in air conditioner refrigerants for leak detection using helium mass spectrometry. Background Technology

[0002] Before assembly, air conditioner components (evaporator and condenser) must be leak-proofed at welded joints and other easily leaking areas. The main leak detection methods are helium mass spectrometry, halogen leak detection, and water leak detection. Helium mass spectrometry has the highest sensitivity and is widely used by major domestic air conditioner manufacturers.

[0003] Helium mass spectrometry leak detection mainly includes three processes: helium charging, leak detection, and helium recovery. During the helium charging process, a charging valve is often installed on the air conditioner's throttle pipe to facilitate the connection of the charging device for charging. At the same time, in order to ensure that the helium can be accurately charged into the air conditioner's two condensers at the specified pressure, the charging valve usually needs to be in the closed state. After the helium charging is completed, it can also avoid accidental helium leakage that may be caused by the opening of the charging valve, reduce helium waste, and prevent the helium from having any adverse effects on the surrounding environment or people.

[0004] Because the inflation valve is in the closed position, it needs to be opened first before connecting the inflation equipment for helium filling. Currently, some systems use compressed air to pneumatically open the inflation valve after connecting the inflation equipment. However, since the compressed air intake channel is connected to the inflation valve, there is a risk of compressed air leakage, which can mix with the helium and enter the air conditioner's internal components. This affects the inflation flow rate and pressure, interfering with the detection results of helium mass spectrometry leak detection. Utility Model Content

[0005] The purpose of this utility model is to provide a quick inflation fixture for an inflation valve. This inflation fixture enables the inflation valve to be opened for inflation when an inflation device is connected to the inflation valve, and reduces the risk of the inflation operation affecting the stability of the inflation valve's open state and the risk of the pneumatic drive operation affecting the inflation accuracy.

[0006] The technical solution adopted by this utility model to solve the above problems is:

[0007] A quick inflation fixture for an inflation valve, comprising:

[0008] The connecting body has a docking cavity at its top for inserting an air inlet valve on the air conditioning pipe, and an air inlet at its bottom. The air inlet and the docking cavity are connected by an air intake channel.

[0009] A push rod is used to open the air inlet of the inflation valve. The push rod is slidably mounted on the connecting body. A compression spring is provided between the push rod and the connecting body. The two ends of the compression spring abut against the push rod and the connecting body respectively. The connection between the air inlet channel and the docking cavity is located on the movement trajectory of the push rod.

[0010] A piston component is used to drive a push rod to slide relative to the connecting body. The connecting body has a piston chamber, and the piston component is slidably disposed in the piston chamber. The bottom end of the connecting body has an airflow channel for inflating the piston chamber, and the inner end of the airflow channel is connected to the piston chamber.

[0011] The connecting body has an isolation cavity located between the docking cavity and the piston cavity. The bottom end of the push rod and the top end of the piston can pass through the connecting body and are located in the isolation cavity. A separator is provided in the isolation cavity, located between the bottom end of the push rod and the top end of the piston. A ring-shaped elastic sheet is provided in the isolation cavity, and the elastic sheet is sleeved on the separator. The inner end and outer end of the elastic sheet are respectively embedded in the separator and the connecting body.

[0012] As a further improvement to the above technical solution, the connecting body includes an upper seat and a lower seat, both of which are tubular structures with openings at both ends. A first annular end cap is inserted and fixed to the bottom opening of the cavity of the upper seat, and a second end cap is inserted and fixed to the bottom opening of the cavity of the lower seat. The inflation port and airflow channel are located on the second end cap. A partition ring is provided inside the cavities of both the upper and lower seats. The cavity of the upper seat is divided by the partition ring to form a connected docking cavity and a sliding cavity. The push rod is slidably disposed in the sliding cavity. Several first... The upper seat has a channel. The first channel is connected to the sliding cavity, and the first channels are arranged at equal angles around the central axis of the upper seat. The cavity of the lower seat is separated by a partition ring to form a connected isolation cavity and a piston cavity. The bottom end of the upper seat is inserted into and fixed in the isolation cavity. The lower seat has a drainage channel connected to the air inlet and several second channels corresponding to the first channels. The drainage channel is circular. The second channels are connected to each other through the drainage channel. When the upper seat is connected to the lower seat, the first channel, the second channel and the drainage channel are connected in sequence to form an air intake channel.

[0013] As a further improvement to the above technical solution, the isolation cavity includes a first chamber for accommodating the separator and a second chamber for accommodating the elastic sheet. The first chamber is cylindrical, and the second chamber is arranged around the first chamber and the two are connected. The thickness of the second chamber gradually decreases from the inside to the outside along the radial direction of the isolation cavity.

[0014] As a further improvement to the above technical solution, the bottom surface of the second end cap is higher than the bottom surface of the lower seat.

[0015] As a further improvement to the above technical solution, a first sealing ring is provided between the bottom end of the upper seat and the top end of the lower seat, and between the top end and the bottom end of the side of the second end cover and the lower seat respectively.

[0016] As a further improvement to the above technical solution, a limiting sleeve is provided inside the piston cavity. The limiting sleeve is sleeved on the rod of the piston component. The bottom end of the limiting sleeve is in the shape of an inverted frustum, so that a gap space is formed between the limiting sleeve and the lower seat body. A through hole is opened on the side of the lower seat body, and the through hole is connected to the gap space.

[0017] As a further improvement to the above technical solution, a second sealing ring is provided between the side of the limiting sleeve and the connecting body, and between the side of the piston shank and the connecting body.

[0018] As a further improvement to the above technical solution, the air inlet is provided with an air inlet connector, and the outer end of the airflow channel is provided with an airflow connector.

[0019] Compared with the prior art, this utility model has the following advantages and effects:

[0020] This invention, through the structural cooperation between the connecting body, the push rod, and the piston, achieves the effect of opening the inflation valve for inflation when an inflation device is connected to the inflation valve. This improves operational convenience, ensures that the inflation device can quickly connect and begin inflation after the inflation valve is opened, and guarantees operational efficiency. At the same time, combined with the isolation chamber's separation effect between the docking chamber and the piston chamber, it reduces the risk of the inflation operation affecting the stability of the inflation valve's open state and the risk of pneumatic drive operation affecting inflation accuracy, thereby reducing interference with the test results. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a quick inflation tool for an inflation valve according to this utility model.

[0022] Figure 2 This is a schematic diagram of the longitudinal section of a quick inflation tool for an inflation valve according to this utility model.

[0023] Figure 3 yes Figure 2 The diagram shows an enlarged schematic of the isolation cavity.

[0024] Figure 4 yes Figure 2 The diagram shows an enlarged schematic of the piston chamber.

[0025] Figure 5 yes Figure 2 The diagram shows an enlarged schematic of the structure of the second end cap.

[0026] Figure 6This is a schematic diagram of the structure of a quick inflation fixture for an inflation valve in its unused state.

[0027] Figure 7 This is a partial structural diagram of a quick inflation fixture for an inflation valve in the inflation state according to this utility model.

[0028] The components include: connecting body 1, upper seat 11, lower seat 12, first end cap 13, second end cap 14, push rod 2, compression spring 21, piston 3, docking cavity 41, air inlet 42, piston cavity 43, airflow channel 44, sliding cavity 45, air intake channel 5, first channel 51, drainage channel 52, second channel 53, isolation cavity 6, first chamber 61, second chamber 62, separator 71, elastic sheet 72, separator ring 73, first sealing ring 74, retaining ring 75, second sealing ring 76, limiting sleeve 81, gap space 82, through hole 83, air inlet connector 84, airflow connector 85, throttle pipe 91, air inlet valve 92, steel ball 93, spring 94, and locking sleeve 95. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0030] See Figures 1-7 This embodiment discloses a quick inflation fixture for an inflation valve, comprising a connecting body 1, a push rod 2, and a piston 3. The top of the connecting body 1 has a docking cavity 41 for inserting an inflation valve from an air regulating pipe. The bottom of the connecting body 1 has an inflation port 42. The inflation port 42 and the docking cavity 41 are connected via an air inlet channel 5. The push rod 2 is used to open the air inlet of the inflation valve. The push rod 2 is slidably mounted on the connecting body 1. A compression spring 21 is provided between the push rod 2 and the connecting body 1, with both ends of the spring 21 abutting against the push rod 2 and the connecting body 1 respectively. The connection between the air inlet channel 5 and the docking cavity 41 is located on the movement trajectory of the push rod 2. The piston 3 is used to drive the push rod 2 to slide relative to the connecting body 1. The connecting body 1 has a piston chamber 43, and the piston 3 is slidably disposed in the piston chamber 43. The bottom end of the connecting body 1 has an airflow channel 44 for inflating the piston chamber 43. The inner end of the airflow channel 44 is connected to the piston chamber 43. The connecting body 1 has an isolation chamber 6, which is located between the docking chamber 41 and the piston chamber 43. The bottom end of the push rod 2 and the top end of the piston 3 can both pass through the connecting body 1 and be located in the isolation chamber 6. The isolation chamber 6 has a separator 71, which is located between the bottom end of the push rod 2 and the top end of the piston 3. The isolation chamber 6 has an annular elastic sheet 72, which is sleeved on the separator 71. The inner end and the outer end of the elastic sheet 72 are respectively embedded in the separator 71 and the connecting body 1.

[0031] Under normal conditions, the push rod 2, under the action of the compression spring 21, abuts against the connection between the intake channel 5 and the docking cavity 41 (e.g., Figure 2 As shown in the diagram, this isolates the air inlet 42 from the docking cavity 41. When the air inlet valve on the air conditioning pipe is inserted into the docking cavity 41 of the connecting body 1, the steel ball on the connecting body 1 is restrained by the locking sleeve under the action of the spring and pressed against the groove on the side of the air inlet valve, thus achieving the stability of the air inlet valve connection on the connecting body 1. At the same time, the push rod 2 slides downward under the push of the bottom end of the air inlet valve, the compression spring 21 is compressed, the push rod 2 releases the isolation between the air intake channel 5 and the docking cavity 41, and at the same time, the separator 71 is clamped between the bottom end of the push rod 2 and the top end of the piston 3, the elastic plate 72 is recessed downward, and during this process, the air inlet valve remains closed, as shown in the diagram. Figure 6 As shown in the image.

[0032] During inflation, compressed air is injected into the piston chamber 43 through the airflow channel 44, causing the piston 3 to slide upward relative to the connecting body 1 under the action of the compressed air. This pushes the separator 71 and the push rod 2 to move together, causing the push rod 2 to push the bottom end of the inflation valve, thereby opening the inflation valve which was in the closed state. At this time, the elastic sheet 72 changes from being concave downward to convex upward (as shown in the image). Figure 7 As shown in the diagram, the high-pressure gas then enters the docking chamber 41 through the air inlet 42 via the air intake channel 5, and can be injected into the air throttle pipe of the air conditioner through the open air inlet valve.

[0033] When inflation is complete, the locking sleeve slides relative to the connecting body 1, releasing the locking sleeve from restricting the movement of the steel ball. When the inflation valve is pulled out of the docking cavity 41, the inflation valve returns to the closed state as the push rod 2 releases its push on the bottom of the inflation valve. At the same time, the push rod 2 resets under the force of the compression spring 21, re-isolating the connection between the air intake channel 5 and the docking cavity 41. When the inflation valve is reinserted into the docking cavity 41, the push rod 2 slides downward under the push of the inflation valve, thereby abutting against the separator 71 and pushing the piston 3 to reset via the separator 71. This allows compressed air to be injected into the piston cavity 43 again through the airflow channel 44, causing the piston 3 to drive the push rod 2 to open the closed inflation valve.

[0034] See Figures 1-3The connecting body 1 includes an upper seat 11 and a lower seat 12. Both the upper seat 11 and the lower seat 12 are tubular structures with openings at both ends. A first end cap 13 in the shape of a ring is inserted and fixed to the bottom opening of the cavity of the upper seat 11, and a second end cap 14 is inserted and fixed to the bottom opening of the cavity of the lower seat 12. An air inlet 42 and an airflow channel 44 are located on the second end cap 14. A partition ring 73 is provided in the cavity of both the upper seat 11 and the lower seat 12. The cavity of the upper seat 11 is divided by the partition ring 73 to form a connected docking cavity 41 and a sliding cavity 45. The push rod 2 is slidably disposed in the sliding cavity 45. Several first channels 51 are opened on the upper seat 11. The first channel 51 is connected to the sliding cavity 45, and each first channel 51 is arranged at equal angles around the central axis of the upper seat 11. The cavity of the lower seat 12 is divided by the partition ring 73 to form a connected isolation cavity 6 and piston cavity 43. The bottom end of the upper seat 11 is inserted and fixed in the isolation cavity 6. The lower seat 12 has a drainage channel 52 connected to the inflation port 42 and several second channels 53 corresponding one-to-one with the first channels 51. The drainage channel 52 is annular, and the second channels 53 are connected to each other through the drainage channel 52. When the upper seat 11 is connected to the lower seat 12, the first channel 51, the second channel 53 and the drainage channel 52 are connected in sequence to form the air intake channel 5. The assembly structure of the connecting body 1 facilitates the assembly of the various components in the connecting body 1, reduces the manufacturing difficulty of the connecting body 1 and improves the convenience of assembling the inflation tool, thereby ensuring manufacturing efficiency.

[0035] In this embodiment, a first sealing ring 74 is provided between the bottom end of the upper seat 11 and the top end of the lower seat 12, and between the top end and the bottom end of the side of the second end cover 14 and the lower seat 12, respectively. The first sealing ring 74 is an O-ring. The second end cover 14 is embedded in the lower seat 12, and the lower seat 12 is provided with a retaining ring 75 to prevent the second end cover 14 from detaching from it.

[0036] See Figure 3 The isolation cavity 6 includes a first chamber 61 for accommodating the separator 71 and a second chamber 62 for accommodating the elastic sheet 72. The first chamber 61 is cylindrical, and the second chamber 62 is arranged around the first chamber 61 and the two are connected. The thickness of the second chamber 62 gradually decreases from the inside to the outside along the radial direction of the isolation cavity 6. It can guide the movement of the separator 71 and limit the degree of deformation of the elastic sheet 72. While ensuring the stability of the movement trajectory of the separator 71, it also ensures the isolation effect of the elastic sheet 72 between the docking cavity 41 and the piston cavity 43.

[0037] See Figure 4The piston chamber 43 is provided with a limiting sleeve 81, which is sleeved on the rod of the piston 3. The bottom end of the limiting sleeve 81 is in the shape of an inverted frustum, so that a gap space 82 is formed between the limiting sleeve 81 and the lower seat 12. A through hole 83 is opened on the side of the lower seat 12, which is connected to the gap space 82. When the piston 3 moves in the piston chamber 43, it ensures that the air in the space between the piston 3 and the limiting sleeve 81 is discharged through the through hole 83 or that external air enters the space between the piston 3 and the limiting sleeve 81 through the through hole 83. This ensures the movement and reset of the piston 3 in the piston chamber 43, thereby ensuring the smoothness of the control of the opening and unopening operation of the inflation valve.

[0038] In this embodiment, a second sealing ring 76 is provided between the side of the limiting sleeve 81 and the connecting body 1, and between the side of the piston 3 handle and the connecting body 1. The second sealing ring 76 is an O-ring.

[0039] See Figure 5 The bottom surface of the second end cap 14 is higher than the bottom surface of the lower seat 12, so that the lower seat 12 can protect the inflation port 42 and the airflow channel 44, reducing the impact of damage to the outer ends of the inflation port 42 and the airflow channel 44 on the stability of the connection with the inflation device.

[0040] See Figure 5 The air inlet 42 is provided with an air inlet connector 84, and the outer end of the airflow channel 44 is provided with an airflow connector 85, which facilitates the connection of external air inlet equipment and improves the convenience of use.

[0041] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A rapid inflation tool for an inflation valve, characterized by, The utility model relates to an air conditioner inflation valve connecting device, which comprises: a connecting body (1) having a docking cavity (41) at the top end for inserting an inflation valve on an air conditioner air pipe, an inflation port (42) at the bottom end of the connecting body (1), and an air inlet channel (5) for communication between the inflation port (42) and the docking cavity (41); a push rod (2) for pushing the air inlet of the inflation valve to open, the push rod (2) being slidably connected to the connecting body (1), a compression spring (21) being arranged between the push rod (2) and the connecting body (1), and the two ends of the compression spring (21) being respectively abutted against the push rod (2) and the connecting body (1), the communication between the air inlet channel (5) and the docking cavity (41) being located on the moving track of the push rod (2); a piston piece (3) for driving the push rod (2) to slide relative to the connecting body (1), the connecting body (1) having a piston cavity (43) formed therein, the piston piece (3) being slidably arranged in the piston cavity (43), and the connecting body (1) having an air flow channel (44) at the bottom end for inflating the piston cavity (43), the inner end of the air flow channel (44) being communicated with the piston cavity (43); wherein the connecting body (1) has an isolation cavity (6) formed therein, the isolation cavity (6) being located between the docking cavity (41) and the piston cavity (43), the bottom end of the push rod (2) and the top end of the piston piece (3) being capable of penetrating through the connecting body (1) and being located in the isolation cavity (6), the isolation cavity (6) having a partition piece (71) arranged therein, the partition piece (71) being located between the bottom end of the push rod (2) and the top end of the piston piece (3), the isolation cavity (6) having an elastic sheet (72) in the form of a ring arranged therein, the elastic sheet (72) being sleeved on the partition piece (71), and the inner end and the outer end of the elastic sheet (72) being respectively embedded in the partition piece (71) and the connecting body (1).

2. The rapid inflation tool for an air valve according to claim 1, characterized by: The connecting body (1) comprises an upper seat body (11) and a lower seat body (12), both of which are tubular structures with open ends, a first end cover (13) in the form of a circular ring is inserted and fixed on the bottom end opening of the cavity of the upper seat body (11), a second end cover (14) is inserted and fixed on the bottom end opening of the cavity of the lower seat body (12), the inflation port (42) and the airflow channel (44) are located on the second end cover (14), a separation ring (73) is arranged in the cavities of the upper seat body (11) and the lower seat body (12), the cavity of the upper seat body (11) is divided into a docking cavity (41) and a sliding cavity (45) in communication through the separation ring (73), a push rod is slidingly arranged in the sliding cavity (45), a plurality of first channels (51) are formed in the upper seat body (11), the first channels (51) are in communication with the sliding cavity (45) and are arranged at equal angles around the central axis of the upper seat body (11), the cavity of the lower seat body (12) is divided into an isolation cavity (6) and a piston cavity (43) in communication through the separation ring (73), the bottom end of the upper seat body (11) is inserted and fixed in the isolation cavity (6), a drainage channel (52) in communication with the inflation port (42) and a plurality of second channels (53) corresponding to the first channels (51) are formed in the lower seat body (12), the drainage channel (52) is in the form of a circular ring, the second channels (53) are in communication through the drainage channel (52), and the first channels (51), the second channels (53) and the drainage channel (52) are in communication in sequence and form an air inlet channel (5) when the upper seat body (11) is connected to the lower seat body (12).

3. The rapid inflation tooling for air valve of claim 1, wherein: The isolation cavity (6) comprises a first chamber (61) for accommodating a separation piece (71) and a second chamber (62) for accommodating an elastic sheet (72), the first chamber (61) is in the form of a cylinder, the second chamber (62) is arranged around the first chamber (61) and is in communication with the first chamber (61), and the thickness of the second chamber (62) gradually decreases from inside to outside along the radial direction of the isolation cavity (6).

4. The rapid inflation tool for an air valve according to claim 2, characterized by: The bottom surface of the second end cover (14) is higher than the bottom surface of the lower seat body (12).

5. The rapid inflation tool for an air valve according to claim 2, characterized by: First sealing rings (74) are arranged between the bottom end of the upper seat body (11) and the top end of the lower seat body (12), and between the top end and the bottom end of the side surface of the second end cover (14) and the lower seat body (12).

6. The rapid inflation tooling for air valve of claim 1, wherein: A limiting sleeve (81) is arranged in the piston cavity (43), the limiting sleeve (81) is sleeved on the rod portion of the piston piece (3), the bottom end of the limiting sleeve (81) is in the form of an inverted circular table, so that a gap space (82) is formed between the limiting sleeve (81) and the lower seat body (12), a through hole (83) is formed in the side surface of the lower seat body (12) and is in communication with the gap space (82).

7. The rapid inflation tooling for air valve according to claim 6, characterized in that: Second sealing rings (76) are arranged between the side surface of the limiting sleeve (81) and the connecting body (1), and between the side surface of the handle portion of the piston piece (3) and the connecting body (1).

8. The rapid inflation tooling for air valve of claim 1, wherein: An inflation connector (84) is arranged on the inflation port (42), and an airflow connector (85) is arranged on the outer end of the airflow channel (44).

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