A solder sucker

Abstract

The utility model discloses a kind of tin suction devices, it is related to tin suction device technical field, including shell, the two openings of air inlet switch are connected with the gas outlet of one of solenoid valve and vacuum generator air inlet respectively by air guide pipe;Soldering bit is threadedly connected between outer tube, the gas outlet of two solenoid valves is connected with the air inlet and gas outlet of cylinder respectively, cylinder telescopic end extends into inner tube, and is connected with piston that inner wall of inner tube slidingly fits, gap is left between outer tube and inner tube, air pipe three is connected with vacuum generator gas outlet, annular flange is provided with gasket between inner tube end portion outer wall, inner tube end portion side wall is provided with multiple notches.The utility model is a kind of tin suction device, user can use sustained suction and intermittent point suction mode according to suction demand, meet the suction of big and small particle soldering slag, and avoid excessive waste gas generated by air compressor.

Description

Technical Field

[0001] This utility model relates to the field of desoldering pump technology, specifically a desoldering pump. Background Technology

[0002] Desoldering pumps are used to remove molten solder from electronic components when disassembling various circuit boards. Currently available desoldering pumps are mechanical manual desoldering pumps. These pumps work by first pressing down on a mechanical spring to compress it, which is then secured by a clip. When removing solder, pressing down on the clip compresses the spring, extending it and creating a piston that generates negative pressure inside the cylinder to draw in the molten solder.

[0003] The main drawbacks of manual desoldering pumps are as follows: 1. Inconvenient operation: First, the spring is compressed, then secured with a clip. When needed, the clip is pressed, and the spring springs up, creating negative pressure to draw in the molten solder. The operation is discontinuous, time-consuming, and labor-intensive. 2. Unadjustable suction power: Since the energy provided by the compression and extension of the spring is fixed, traditional manual desoldering pumps collect small solder dross particles by repeatedly sucking them up. However, for large circuit boards, the solder dross will naturally be larger, and there is no possibility to increase the suction power of traditional manual desoldering pumps. This makes it difficult to ensure that large particles are effectively and quickly sucked up and removed from the circuit board. Utility Model Content

[0004] The purpose of this invention is to provide a desoldering pump to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a desoldering pump, including a housing, a solenoid valve, a vacuum generator and an air inlet switch are built into the housing, the air inlet of the solenoid valve is connected to an external pipeline, the external pipeline is connected to an air compressor, the air compressor provides high-pressure gas to the solenoid valve, the two openings of the air inlet switch are connected to one of the air outlets of the solenoid valve and the air inlet of the vacuum generator respectively through air guide pipes, the air inlet switch is a manual switch, and its manual valve is embedded in the surface wall of the housing, the manual valve is used to rotate to open / close the air inlet switch; The suction operating lever has a cylinder, an inner tube and an outer tube threaded to the end of the cylinder, a desoldering nozzle threaded to the end of the outer tube, and a threaded connection between the desoldering nozzle and the outer tube. Two air outlets of the solenoid valve are respectively connected to air pipe one and air pipe two, which are respectively connected to the air inlet and air outlet of the cylinder. The telescopic end of the cylinder extends into the inner tube and is connected to a piston that slides against the inner wall of the inner tube. The piston divides the inner tube into an adjustment chamber and a recovery chamber. A gap is left between the outer tube and the inner tube. A connecting plug is provided at the connection between the outer wall of the cylinder end and the outer tube. One end of the connecting plug is open and connected to the air pipe three, and the other end is open and connected to the gap. The air pipe three is connected to the air outlet of the vacuum generator. One end of the desoldering nozzle extends to a reduced hollow suction head, and the other end has a built-in annular flange. A gasket is provided between the annular flange and the outer wall of the inner tube end. Multiple notches are opened on the side wall of the inner tube end. The gasket is used to selectively seal the gap and control whether the gap is connected to the inner tube.

[0006] In a further embodiment, the washer is a hollow annular sheet or an elongated washer, and the end of the elongated washer is provided with a reduced hollow portion; In a further embodiment, when the hollow annular sheet is placed on the annular flange, the hollow annular sheet abuts against the position from the end side wall of the inner tube to the inner wall of the outer tube, and the notch connects the hollow channel and the inner tube.

[0007] In a further embodiment, when the extended washer is placed on the annular flange, the extended washer abuts against the position from the inner tube end side wall to the outer tube inner wall, while the reduced hollow part is inserted into the inner tube end inner wall to seal the gap.

[0008] In a further embodiment, sealing rings are fitted onto the outer walls of both ends of the piston along the axial direction, and an annular oil reservoir is provided on the outer wall of the piston along the radial direction, located between the two sealing rings.

[0009] In a further embodiment, an oil-absorbing ring is fixedly sleeved on the outer wall of the piston, and the oil-absorbing ring is used to absorb lubricating oil.

[0010] In a further embodiment, a pin that can be inserted into a reduced hollow suction head is fixedly connected to the side wall of the piston facing the desoldering nozzle.

[0011] In a further embodiment, a silencer box is also included, which has two external interfaces. One external interface is connected to a Y-tube, and the two interfaces of the Y-tube are connected to two of the air outlets of the solenoid valve. The other external interface is connected to a conduit, which is connected to the interface of the vacuum generator. The muffler box contains two muffler tubes, which are connected to an external interface located at one end of the muffler box.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This utility model is a desoldering pump. By having a piston slide back and forth inside the tube, it generates suction force to draw molten solder dross from the circuit board into the inner tube. It can also be equipped with a vacuum generator to provide greater suction force inside the inner tube and to pick up larger solder dross particles. Users can use continuous suction or intermittent spot suction according to their needs, which can satisfy the need to pick up large and small solder dross particles while avoiding excessive waste of the gas generated by the air compressor. It is simple and practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the assembly structure of the shell and the silencer box according to an embodiment of the present utility model; Figure 3 indivual Figure 4 These are schematic diagrams of the solenoid valves and vacuum generators according to embodiments of this utility model; Figure 5 and Figure 6 This is a schematic diagram showing the disassembled structure of the suction operating lever according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the cylinder structure according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the desoldering nozzle in an embodiment of the present invention.

[0014] In the diagram: 1. Housing; 11. Air pipe three; 12. Air pipe one; 13. Air pipe two; 2. Silencer box; 21. Silencer pipe; 22. Tube; 23. Y-tube; 24. External pipeline; 3. Cylinder; 31. External tube; 32. Desoldering nozzle; 321. Annular flange; 33. Control switch; 34. Connecting plug; 35. External power cord; 36. Inner tube; 361. Notch; 37. Ejector pin; 38. Hollow annular sheet; 381. Extended washer; 39. Piston; 4. Intake switch; 5. Solenoid valve; 6. Vacuum generator. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This embodiment provides a desoldering pump, such as... Figure 1 , Figure 3 and Figure 4As shown, the device includes a housing 1, with a detachable cover at the top. The cover is fixed to the top of the housing 1 with screws. The housing 1 houses a solenoid valve 5, a vacuum generator 6, and an air inlet switch 4. It also includes a switching power supply module, which is connected to a relay via wires. The solenoid valve 5 is connected to the switching power supply module via wires. The switching power supply module is connected to an external power line 35 passing through the housing 1, which is connected to 220V AC power. The built-in step-down module of the switching power supply module provides 12V to power the solenoid valve 5. The solenoid valve 5 is a five-position three-way pneumatic solenoid valve. The air inlet of the solenoid valve 5 is connected to an external pipeline 24, which is connected to an air compressor. The air compressor provides high-pressure gas to the solenoid valve 5.

[0017] In addition, such as Figure 1 As shown, the two openings of the intake switch 4 are connected to one of the outlets of the solenoid valve 5 and the inlet of the vacuum generator 6 respectively via air guide pipes. The intake switch 4 is a manual switch, and its manual valve is embedded in the surface wall of the housing 1. The manual valve is used to rotate the intake switch 4 to open / close it; thus, it controls whether the high-pressure gas at the outlet of the solenoid valve 5 enters the vacuum generator 6. If the intake switch 4 is closed, and no high-pressure gas enters the vacuum generator 6, it will not work. If the intake switch 4 is opened, and high-pressure gas enters the vacuum generator 6, it will work normally.

[0018] In this embodiment, the suction operating rod has a cylinder 3, an inner tube 36 and an outer tube 31 threadedly connected to the end of the cylinder 3. A threaded sleeve is provided at the end of the cylinder 3 and threadedly connected to the outer tube 31. The end of the threaded sleeve is provided with a narrowing part for threadedly connecting the inner tube 36. After the inner tube 36 and the outer tube 31 are installed, a gap is left between the outer tube 31 and the inner tube 36. The outer tube 31 of the solenoid valve 4 is threadedly connected to a desoldering nozzle 32, which is threadedly connected to the outer tube 31. Two of the air outlets of the solenoid valve 5 are respectively connected to air pipe 12 and air pipe 2 13. Air pipe 12 and air pipe 2 13 are respectively connected to the air inlet and air outlet of the cylinder 3. The telescopic end of the cylinder 3 extends into the inner tube 36 and is connected to a piston 39 that slides against the inner wall of the inner tube 36. At the same time, a control switch 33 is set on the outer wall of the cylinder 3. The control switch 33 is connected to the switching power supply module inside the housing 1 through a wire. Pressing the control switch 33 can start the solenoid valve 4. The solenoid valve 4 can control the air pipe 12 and air pipe 2 13 to alternately release air.

[0019] Furthermore, such as Figure 5 and Figure 6As shown, a gap is left between the outer tube 31 and the inner tube 36. A connecting plug 34 is provided at the connection between the outer wall of the cylinder 3 end and the outer tube 31. One end of the connecting plug 34 is connected to the air pipe 11, and the other end is connected to the gap. The air pipe 11 is connected to the air outlet of the vacuum generator 6. A gasket is provided between the annular flange 321 and the outer wall of the inner tube 36 end. Multiple notches 361 are opened on the side wall of the inner tube 36 end. The gasket is used to selectively seal the notches 361 to control whether the gap and the inner tube 36 are connected.

[0020] Specifically, the piston 39 divides the inner tube 36 into an adjustment chamber and a recovery chamber; the recovery chamber is in constant communication with the desoldering nozzle 32, which has a reduced hollow suction head at one end and an annular flange 321 built into the other end, such as... Figure 8 As shown, when air enters through the air pipe 12, the piston 39 slides along the inner tube 36 towards the end away from the desoldering nozzle 32. While sliding, a negative pressure is generated, and the recovery chamber has a suction force. The reduced hollow suction head of the desoldering nozzle 32 approaches the solder slag and can suck the solder slag into the recovery chamber.

[0021] When air enters through air pipe 13, piston 39 slides along the inner tube 36 towards the end near the desoldering nozzle 32, so that piston 39 can be adjusted to be closer to the desoldering nozzle 32, and then air is supplied to air pipe 12 again for suction. To prevent the solder dross collected in the inner tube 36 from being pushed out by piston 39, as follows: Figure 7 As shown, a pin 37 that can be inserted into the shrinking hollow suction head is fixedly connected to the side wall of the piston 39 facing the desoldering nozzle 32. There is a gap between the pin 37 and the inner wall of the shrinking hollow suction head, but the gap is only 1mm. In this way, it can be avoided that the recycling chamber is not connected to the outside when the piston 39 slides, which would cause the piston 39 to have resistance. At the same time, the 1mm gap will prevent solder dross from being pushed out.

[0022] Additionally, the washer here is a hollow annular thin sheet 38 or an extended washer 381, with the extended washer 381 having a reduced hollow portion at its end; such as Figure 6 and Figure 7 As shown.

[0023] When the hollow annular sheet 38 is placed on the annular flange 321, the hollow annular sheet 38 abuts against the end wall of the inner tube 36 to the inner wall of the outer tube 31, and the notch 361 connects the hollow channel with the inner tube 36. At this time, it is also necessary to open the manual valve of the air inlet switch 4 to allow the solenoid valve 4 to supply air to the vacuum generator 6. After the vacuum generator 6 is working, the air in the vacuum channel is extracted through the air pipe 11. At the same time, the negative pressure generated by the piston 39 sliding away from the desoldering nozzle 32 is combined to enhance the suction force. This is used for the suction of large particles of solder dross. The user holds the tail of the cylinder 3 and presses the control switch 34 with one hand to activate the solenoid valve 4, which alternately supplies air to the air pipe 12 and the air pipe 2 13, thereby realizing the continuous reciprocating adjustment of the piston 39. The above process is a continuous suction method used to meet the needs of suctioning large particles of solder dross on the circuit board.

[0024] According to the user's suction needs, the user can continuously press the control switch 34, and at the same time use the hollow annular sheet 38 placed on the annular flange 321 to connect the inner tube 36 and the outer tube 31. The vacuum generator 6 and the solenoid valve 5 cooperate with each other for continuous suction.

[0025] When the extended washer 381 is placed on the annular flange 321, the extended washer 381 abuts against the end wall of the inner tube 36 to the inner wall of the outer tube 31. At the same time, the reduced hollow part is inserted into the inner wall of the end of the inner tube 36, using the reduced hollow part to seal the gap 361. Simultaneously, the manual valve of the air inlet switch 4 should be closed, and the vacuum generator 6 should not work, which is used for the suction of small particles of solder dross.

[0026] Alternatively, the control switch 34 can be pressed intermittently, while the extended washer 381 is placed on the annular flange 321 to block the notch 361 for intermittent spot suction, thereby absorbing small particles of solder dross. This satisfies the need to absorb solder dross while avoiding excessive waste of the gas produced by the air compressor.

[0027] In addition, during piston 39 operation, to reduce sliding resistance and ensure the sealing of the recovery chamber, sealing rings are fitted onto the outer walls of both axial ends of piston 39, and annular oil reservoirs are located on the radial outer wall of piston 39 between the two sealing rings. The sealing rings enhance the sealing of piston 39 during sliding, preventing air leakage. The annular oil reservoirs store grease to ensure smooth sliding of piston 39.

[0028] In addition, an oil-absorbing ring can be fixedly fitted onto the outer wall of the piston 39. The oil-absorbing ring is used to absorb lubricating oil. The oil-absorbing ring can be made of a sponge or other material with good absorption capacity.

[0029] During the process of extracting solder dross, the gas is pressurized by an external compressor, resulting in noticeable noise. Therefore, this embodiment also includes a silencer box 2. Figure 2 As shown, the silencer box 2 has two external interfaces. One interface is connected to a Y-tube 23, and the two ports of the Y-tube 23 are connected to two of the air outlets of the solenoid valve 5. The other interface is connected to a conduit 22, which is connected to the interface of the vacuum generator 6. The silencer box 2 contains two silencer tubes 21, which are connected to the open ends of the external interfaces located inside the silencer box 2. By using the two silencer tubes 21 coiled inside the silencer box 2, the noise generated during the operation of the solenoid valve 4 and the vacuum generator 6 is significantly absorbed, thereby greatly reducing noise pollution.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A desoldering pump, characterized in that, include: The housing (1) contains a solenoid valve (5), a vacuum generator (6) and an air inlet switch (4). The air inlet of the solenoid valve (5) is connected to an external pipeline (24). The two openings of the air inlet switch (4) are connected to one of the air outlets of the solenoid valve (5) and the air inlet of the vacuum generator (6) respectively through air guide pipes. The suction operating rod has a cylinder (3), an inner tube (36) and an outer tube (31) threaded to the end of the cylinder (3). The end of the outer tube (31) is threaded with a desoldering nozzle (32). The desoldering nozzle (32) is threaded to the outer tube (31). Two of the air outlets of the solenoid valve (5) are respectively connected to air pipe one (12) and air pipe two (13). Air pipe one (12) and air pipe two (13) are respectively connected to the air inlet and air outlet of the cylinder (3). The telescopic end of the cylinder (3) extends into the inner tube (36) and is connected to a piston (39) that slides against the inner wall of the inner tube (36). A gap is left between the outer tube (31) and the inner tube (36). A connector (34) is provided at the connection between the outer wall of the cylinder (3) end and the outer tube (31). One end of the connector (34) is connected to the air pipe (11), and the other end is connected to the gap. The air pipe (11) is connected to the air outlet of the vacuum generator (6). One end of the desoldering nozzle (32) extends to a reduced hollow suction head, and the other end has an internal annular flange (321). A gasket is provided between the annular flange (321) and the outer wall of the inner tube (36) end. Multiple notches (361) are opened on the side wall of the inner tube (36) end. The gasket is used to selectively seal the gap (361) and control whether the gap is connected to the inner tube (36).

2. The desoldering pump according to claim 1, characterized in that, The washer is a hollow annular sheet (38) or an extended washer (381), and the extended washer (381) has a reduced hollow part at its end.

3. The desoldering pump according to claim 2, characterized in that, When the hollow annular sheet (38) is placed on the annular flange (321), the hollow annular sheet (38) abuts against the end side wall of the inner tube (36) to the inner wall of the outer tube (31), and the notch (361) connects the hollow channel with the inner tube (36).

4. The desoldering pump according to claim 2, characterized in that, When the extended washer (381) is placed on the annular flange (321), the extended washer (381) abuts against the position from the end side wall of the inner tube (36) to the inner wall of the outer tube (31), and at the same time the reduced hollow part is inserted into the inner wall of the end of the inner tube (36), and the reduced hollow part is used to seal the gap (361).

5. The desoldering pump according to claim 1, characterized in that, The piston (39) has sealing rings fitted on the outer walls of both ends in the axial direction, and the piston (39) has an annular oil reservoir located on the outer wall of the radial direction between the two sealing rings.

6. The desoldering pump according to claim 1, characterized in that, The piston (39) is fixedly fitted with an oil-absorbing ring on its outer wall, which is used to absorb lubricating oil.

7. The desoldering pump according to claim 1, characterized in that, The piston (39) has a pin (37) fixedly connected to its side wall facing the desoldering nozzle (32), which can be inserted into the reduced hollow suction head.

8. The desoldering pump according to claim 1, characterized in that, It also includes a silencer box (2), which has two external interfaces. One of the external interfaces is connected to a Y-tube (23), and the two interfaces of the Y-tube (23) are connected to two of the air outlets of the solenoid valve (5). The other external interface is connected to a conduit (22), and the conduit (22) is connected to the interface of the vacuum generator (6). The silencer box (2) has two silencer tubes (21) inside, and the silencer tubes (21) are connected to one end of the external interface located inside the silencer box (2).

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