Air pressure type dredger

Abstract

The utility model belongs to pipeline dredging tool technical field, concretely relates to a kind of air pressure dredging device, it includes: inflating device, with main mounting seat, inflator, inflating rod and air inlet check valve;Gas storage device, with the inflator of being installed in the other side of main mounting seat, the gas storage cavity of this inflator is communicated the inflating chamber of inflator by air inlet check valve;And shell, with first shell, second shell and fixed lid that are successively sleeved in the outside of inflator, fixed lid is fixed in the air inlet end of inflator, and second shell, first shell are successively butted to main mounting seat;Wherein, the side wall of first shell or / and second shell extends handle.This utility model's fixed lid can be fixed in main mounting seat after being screwed in the air inlet end of inflator, the quick installation of shell is realized, and it is not necessary to set up screw and other structures in addition, with the characteristics such as simple structure, easy installation.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipe dredging tools, specifically relating to a pneumatic dredging device. Background Technology

[0002] Clogged drains and toilets are common occurrences in daily life, and pneumatic drain cleaners are a frequent tool for solving such problems. Utility model patent CN218881073U discloses a pneumatic toilet drain cleaner, which includes an air storage device and a gas supply device. The gas supply device inflates the air storage device to generate high-pressure gas, and releasing this high-pressure gas clears the clogged pipes. The gas supply device has an outer casing, traditionally consisting of a left and right shell, which are fixed together by screws. This makes assembly cumbersome and inefficient. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic drain cleaner that is simple in structure and easy to install.

[0004] The present invention adopts the following technical solution:

[0005] A pneumatic drain cleaner includes: an air pumping device having a main mounting base, an air pump fixed to one side of the main mounting base, an air pumping rod disposed inside the air pump, and an air inlet check valve disposed at the air outlet end of the air pump; an air storage device having an air storage cylinder disposed on the other side of the main mounting base, the air storage chamber of the air storage cylinder being connected to the air pumping chamber of the air pump through the air inlet check valve; and a housing having a first outer shell, a second outer shell, and a fixing cover sequentially fitted onto the outside of the air pump, the fixing cover being fixed to the air inlet end of the air pump, and the second outer shell and the first outer shell being sequentially abutted against the main mounting base; wherein a handle extends from the side wall of the first outer shell and / or the second outer shell.

[0006] The pneumatic drain cleaner proposed in this utility model also has the following feature: a first handle portion extends from the side wall of the first outer shell; a second handle portion extends from the side wall of the second outer shell; the first handle portion and the second handle portion together form a handle.

[0007] The pneumatic drain cleaner proposed in this utility model also has the following features: the air inlet end of the air pump is provided with a first external thread, and a fixing cap is provided on the first external thread; or / and, the outer ends of the first handle and the second handle are together formed with a second external thread, and a handle nut is provided on the first external thread.

[0008] The pneumatic drain cleaner proposed in this utility model also has the following features: a first connecting edge is formed between the main body of the first outer shell and the first handle portion; a second connecting edge is formed between the main body of the second outer shell and the second handle portion; in the first connecting edge and the second connecting edge, one connecting edge is provided with a groove and the other connecting edge is provided with a strip.

[0009] The pneumatic drain cleaner proposed in this utility model also has the following feature: the air pump and the main mounting base are integrally formed.

[0010] The pneumatic drain cleaner proposed in this utility model also has the following features: a pressure gauge mounting part is provided on the first outer shell, and a viewing window is provided on the pressure gauge mounting part; a pressure mounting part communicating with the air storage chamber is provided on one side of the main mounting base where the air pump is located, and a pressure display gauge is provided in the pressure mounting part. The pressure display gauge is located in the pressure gauge mounting part, and the display part of the pressure display gauge faces the viewing window.

[0011] The pneumatic drain cleaner proposed in this utility model also has the following features: an air inlet chamber connecting the air pumping chamber and the air storage chamber is provided on one side of the main mounting base where the air storage cylinder is located; a venting mounting part connecting the air inlet chamber is provided on one side of the main mounting base where the air pump is located; the air storage device has an air outlet pipe disposed inside the air storage cylinder, the inner end of which faces the air inlet chamber and the outer end of which extends out of the air storage cylinder; the drain cleaner also includes a venting control device, which has: a venting valve mounted on the handle; a venting pipe disposed between the venting mounting part and the venting valve; and a main piston movably disposed in the air inlet chamber and used to open or seal the inner end of the venting pipe.

[0012] The pneumatic drain cleaner proposed in this utility model also has the following feature: the venting pipe is composed of a venting pipe and / or a pipe joint, and the venting pipe is a rigid pipe or a flexible pipe.

[0013] The pneumatic drain cleaner proposed in this utility model also has the following features, wherein the vent valve comprises: a valve body having a valve cavity and a connecting joint for connecting a vent pipe; a valve core mounting component disposed within the valve cavity and having a valve core mounting hole; a valve core passing through the valve core mounting hole, its sealing end being located within the valve cavity and fitted with a vent sealing ring; and a button connected to the pressing end of the valve core, wherein a vent spring is provided between the button and the valve core mounting component for driving the valve core to seal the valve core mounting hole, and pressing the button can drive the valve core to open the valve core mounting hole.

[0014] The pneumatic drain cleaner proposed in this utility model also has the following feature: the vent valve has a vent mounting plate, which is disposed on the valve core mounting component or the valve body.

[0015] The first handle portion of the handle is provided with a support portion and a snap-fit ​​portion for mounting the venting mounting plate; and / or the second handle portion of the handle is provided with a fixing groove portion for mounting the valve body.

[0016] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0017] 1. The fixed cover of this utility model is threadedly connected to the air inlet end of the air pump, which can fix the second outer shell and the first outer shell on the main mounting base, realizing the quick installation of the outer shell without the need for additional screws or other fixing structures. It has the characteristics of simple structure and convenient installation.

[0018] 2. A first handle portion extends from the side wall of the first outer shell of this utility model; a second handle portion extends from the side wall of the second outer shell. The first handle portion and the second handle portion together form a handle, which facilitates the installation of structures such as the vent valve. At the same time, the vent valve button is provided on the handle, which can improve the user's operating experience.

[0019] 3. The air pump and the main mounting base of this utility model are integrally formed, which has the advantages of convenient processing and high sealing performance at the connection.

[0020] 4. The venting valve of this utility model has the advantages of simple structure and convenient assembly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the pneumatic drain cleaner of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of the shell of this utility model.

[0023] Figure 3 This is a cross-sectional view of the pneumatic drain cleaner of this utility model.

[0024] Figure 4 This is a partial cross-sectional view of the pneumatic drain cleaner of this utility model.

[0025] Figure 5 This is a partial exploded view of the pneumatic drain cleaner of this utility model.

[0026] Figure 6 This is a schematic diagram of the structure of the venting control device and the first outer shell of this utility model.

[0027] Figure 7 This is a structural schematic diagram of the venting control device and the main mounting base of this utility model.

[0028] Figure 8 yes Figure 4 A sectional view of the vent valve installation location at point A in the middle.

[0029] Figure 9This is an exploded view of the vent valve of this utility model.

[0030] The meaning of the labels in the diagram:

[0031] 1. Air pumping device; 2. Air storage device; 3. Housing; 4. Air release control device; 5. Pressure display gauge;

[0032] Main mounting base 11; pressure mounting part 111; air inlet chamber 112; air release mounting part 113; inner ring wall 114; outer ring wall 115; air pump 12; first external thread part 121; air pump rod 13; air inlet check valve 14; air pump handle 15;

[0033] 21. Gas storage tank; 22. Gas outlet fitting; 23. Gas outlet sealing sleeve;

[0034] First outer casing 31; First handle portion 311; First connecting edge 312; Locking strip 313; Pressure gauge mounting portion 314; Viewing window 315; Second outer casing 32; Second handle portion 321; Second connecting edge 322; Slot 323; Guide portion 324; Fixing cover 33; First internal thread portion 331; Air pump mounting hole 332; Handle 34; Second external thread portion 341; Support portion 342; Buckle portion 343; Fixing groove portion 344; Handle nut 35;

[0035] Vent valve 41; valve body 411; connecting joint 4111; valve core mounting part 412; valve core mounting hole 4121; mounting groove 4122; valve core 413; valve stem part 4131; valve stem sealing part 4132; guide bar 4133; vent sealing ring 414; button 415; vent spring 416; vent mounting plate 417; mounting protrusion 4171; vent pipeline 42; main piston 43. Detailed Implementation

[0036] The present invention will be further described below with reference to specific embodiments:

[0037] like Figure 1 As shown, a pneumatic drain cleaner includes an air pumping device 1, an air storage device 2, a housing 3, an air release control device 4, and a pressure display gauge 5.

[0038] like Figure 2-4 As shown, the air pumping device 1 has a main mounting base 11, an air pump 12 fixed to one side of the main mounting base 11, an air pump rod 13 disposed inside the air pump rod 12, an air pump handle 15 installed at the outer end of the air pump rod 13, and an air inlet check valve 14 disposed at the air outlet end of the air pump 12.

[0039] Specifically, both the main mounting base 11 and the air pump 12 are hollow cylinders, integrally formed by injection molding, welding, or other methods, or sealed and fixedly connected by threaded connections. Preferably, the main mounting base 11 and the air pump 12 are integrally injection molded from plastic. The outer diameter of the air pump 12 is smaller than the outer diameter of the main mounting base 11, and it is located in the middle of one side of the main mounting base 11, preferably coaxially arranged. The other side of the main mounting base 11 is provided with an inner ring wall 114 and an outer ring wall 115, with an air inlet chamber 112 formed within the inner ring wall 114. The inner ring wall 114 is located inside the outer ring wall 115, and the two are coaxially arranged. The inner side of the outer ring wall 115 is provided with an internal thread for connecting the air storage device 2.

[0040] The inner cavity of the air pump 12 is an air pumping chamber. A one-way valve mounting hole is provided on the main mounting base 11 between the air pumping chamber and the air inlet chamber 112. An air inlet one-way valve 14 is installed in the one-way valve mounting hole, which only allows gas to enter the air inlet chamber 112 from the air pumping chamber. The air pump 12 is movably disposed in the air pumping chamber. The air pump 12 has an air pumping piston part located in the air pumping chamber and a handle mounting part extending out of the air pumping chamber. The air pumping piston part is movably connected to the inner wall of the air pump 12 through an air pumping sealing ring, and the handle mounting part is engaged with an air pumping handle 15.

[0041] like Figure 3 As shown, the gas storage device 2 has a gas storage cylinder 21 installed on the other side of the main mounting base 11 and a gas outlet pipe 22 disposed inside the gas storage cylinder 21. The gas storage cylinder 21 has a gas storage cylinder connection end connected to the outer ring wall 115 and a gas storage cylinder outlet end. The gas storage cylinder connection end is provided with an external thread adapted to the internal thread of the outer ring wall 115. The inner cavity of the gas storage cylinder 21 is a gas storage chamber, which is connected to the air inlet chamber 112 and can be connected to the air pumping chamber through the air inlet check valve 14. The gas outlet pipe 22 is installed on the gas outlet end of the gas storage cylinder or is an integrally formed gas storage cylinder outlet end. At the same time, the inner end of the gas outlet pipe 22 can face the air inlet chamber 112, and its outer end extends out of the gas storage cylinder 21 to form a gas outlet connector. The gas outlet connector is used to connect a plug device (not shown in the figure). The plug device is used to seal the blocked pipe and deliver the high-pressure gas from the gas storage cylinder 21 into the pipe.

[0042] Preferably, the gas storage cylinder 21 is made of stainless steel, and the gas outlet end of the gas storage cylinder is provided with a gas outlet pipe mounting hole. The gas outlet pipe fitting 22 includes a gas outlet pipe and a gas outlet connector. The outer end of the gas outlet pipe is provided with a sealing boss and an external threaded connection part. A gas outlet sealing ring is provided on the sealing boss and abuts against the inner wall of the gas outlet end of the gas storage cylinder. The external threaded connection part extends out of the gas outlet pipe mounting hole and is threadedly connected to the gas outlet connector. The inner end of the gas outlet pipe is the gas outlet, and a gas outlet sealing sleeve 23 is fitted on the gas outlet. The gas outlet sealing sleeve 23 is annular, and an annular groove is opened on one side. It is fitted onto the end of the gas outlet pipe through the annular groove. In order to increase the positional stability of the gas outlet pipe, several support frames can also be distributed at intervals inside the gas storage cylinder 21. The inner ring of the support frame is fitted with the gas outlet pipe, and the outer ring is installed on the inner wall of the gas storage cylinder 21 to achieve the positioning of the inner end of the gas outlet pipe.

[0043] like Figure 2 As shown, the housing 3 has a first outer shell 31, a second outer shell 32 and a fixing cover 33 that are sequentially fitted onto the outside of the air pump 12. The fixing cover 33 is fixed to the air inlet end of the air pump 12 and the second outer shell 32 and the first outer shell 31 are sequentially abutted against the main mounting base 11. A handle 34 extends from the side wall of the first outer shell 31 or / and the second outer shell 32.

[0044] Specifically, such as Figure 5 As shown, the air inlet end of the air pump 12 is provided with a first external thread 121, and a fixing cover 33 is provided on the first external thread 121. The fixing cover 33 has an annular fixing body, and the outer edge of the annular fixing body extends to provide a first internal thread 331 that matches the first external thread 121. The middle part of the annular fixing body has an air pump rod mounting hole 332 for the air pump 12 to pass through. The outer wall of the annular fixing body is provided with anti-slip texture for easy direct rotation installation. In this embodiment, the fixing cover 33 is threadedly connected to the air inlet end of the air pump 12, which can fix the second outer shell 32 and the first outer shell 31 on the main mounting base 11, realizing the quick installation of the outer shell 3. It does not require additional fixing structures such as screws, and has the characteristics of simple structure and convenient installation.

[0045] The main body of the first outer casing 31 is annular, with one end abutting against the mounting step of the main mounting base 11. A first handle portion 311 extends from the side wall of the main body of the first outer casing 31, and the cross-section of the first handle portion 311 is semi-circular. The main body of the second outer casing 32 is multi-ringed, wherein the larger inner diameter portion fits with the main body of the first outer casing 31 to form an inner cavity for mounting the deflation control device 4 and the pressure display gauge 5; the smaller inner diameter portion is directly fitted onto the air inlet end of the air pump 12 and abuts against the mounting step of the fixed cover 33. This smaller inner diameter portion is adapted to the outer diameter of the air pump 12, making the overall structure more compact. A second handle portion 321 extends from the side wall of the second outer casing 32, and the cross-section of the second handle portion 321 is also semi-circular. The first handle portion 311 and the second handle portion 321 are joined together to form an annular handle 34. In other embodiments, the complete handle 34 can be provided on the first outer casing 31 or the second outer casing 32.

[0046] To increase the connection stability between the first outer shell 31 and the second outer shell 32, a first connecting edge 312 is formed between the main body of the first outer shell 31 and the first handle portion 311, and a second connecting edge 322 is formed between the main body of the second outer shell 32 and the second handle portion 321. In the first connecting edge 312 and the second connecting edge 322, one connecting edge is provided with a slot 323, and the other connecting edge is provided with a locking strip 313 that is adapted to the slot 323.

[0047] Specifically, such as Figure 6 As shown, a first connecting edge 312 is formed between the main body of the first outer shell 31 and the first handle portion 311, and a retaining strip 313 is provided on the first connecting edge 312. Figure 5 As shown, a second connecting edge 322 is formed between the main body of the second outer shell 32 and the second handle portion 321. A slot 323 is provided on the second connecting edge 322, and at least one guide portion 324 is provided inside the slot 323. The guide portion 324 has a sheet-like structure, and its outer contour matches the inner contour of the main body of the first outer shell 31, facilitating the connection and guidance of the first outer shell 31 and the second outer shell 32. In another embodiment, a slot 323 can be provided on the first connecting edge 312, and a retaining strip 313 can be provided on the second connecting edge 322.

[0048] Preferably, the outer ends of the first handle portion 311 and the second handle portion 321 are together formed with a second external thread portion 341, and a handle nut 35 is provided on the first external thread portion 321, so that the fixing of the first handle portion 311 and the second handle portion 321 is more reliable.

[0049] like Figure 5As shown, a pressure gauge mounting part 314 is provided on the first outer casing 31. The pressure gauge mounting part 314 is an arc-shaped inner groove, and a viewing window 315 is provided on the pressure gauge mounting part 314. Figure 7 As shown, a pressure mounting part 111 communicating with the air storage chamber is provided on one side of the main mounting base 11 where the air pump 12 is located. The pressure mounting part 111 is a mounting hole. A pressure display gauge 5 is provided inside the pressure mounting part 111. The pressure display gauge 5 is located inside the pressure gauge mounting part 314, and the display part of the pressure display gauge 5 faces the viewing window 315, so that the user can easily check the air pressure in the air storage chamber.

[0050] like Figure 7 As shown, a venting mounting part 113 communicating with the air inlet chamber 112 is also provided on one side of the main mounting base 11 where the air pump 12 is located. The venting mounting part 113 is an inclined mounting slot. The venting mounting part 113 and the pressure gauge mounting part 314 are located on both sides of the air pump 12, respectively.

[0051] The venting control device 4 includes a venting valve 41, a venting pipeline 42, and a main piston 43.

[0052] Specifically, the vent valve 41 is mounted on the handle 34, and the vent pipe 42 is located between the vent mounting part 113 and the vent valve 41. The vent pipe 42 consists of a vent tube and / or a pipe connector, and the vent tube is either a rigid pipe or a flexible pipe. In this embodiment, the vent pipe 42 consists of a rigid pipe and a pipe connector. The rigid pipe is mounted on the outer wall of the air pump 12, and one end of the rigid pipe is fixed inside the vent mounting part 113 by an O-ring, while the other end is connected to the pipe connector, which is a bendable pipe connector.

[0053] The main piston 43 is movably disposed within the intake chamber 112 and serves to open or seal the inner end of the outlet pipe 22. In this embodiment, a gap is provided between the main piston 43 and the inner ring wall 114. When air enters the intake chamber 112, the main piston 43 can abut against the outlet sealing sleeve 23 to effectively seal the outlet and ensure the airtightness of the gas storage chamber. Simultaneously, gas can enter the gas storage chamber of the gas storage cylinder 21 through this gap. Furthermore, the outer diameter of the main piston 43 is larger than the outer diameter of the inner end of the outlet pipe 22.

[0054] like Figure 8 , 9 As shown, the vent valve 41 has a valve body 411, a valve core mounting part 412, a valve core 413, a vent sealing ring 414, a button 415, and a vent spring 416.

[0055] Specifically, the valve body 411 has a valve cavity and a connecting joint 4111 for connecting to the venting pipe 42. The connecting joint 4111 is connected to the pipe joint of the venting pipe 42 via an O-ring, allowing the valve cavity to communicate with the intake chamber 112. A valve core mounting component 412 is threaded into the valve cavity of the valve body 411. The valve core mounting component 412 has a valve core mounting hole 4121 communicating with the valve cavity. A valve core 413 passes through the valve core mounting hole 4121. The valve core 413 has an integrally formed valve stem portion 4131 and a valve stem sealing portion 4132. The valve stem portion 4131 is installed in the valve core mounting hole 4121, forming a gas guiding channel with the side wall of the valve core mounting hole 4121. In this embodiment, a guide bar 4133 is provided on the valve stem portion 4131, forming a gas guiding channel between two adjacent guide bars 4133. The guide bar 4133 can abut against the valve core mounting hole 4121 and serve a guiding function. In another embodiment, the side wall of the valve core mounting hole 4121 is provided with an air guide channel, which is an air guide groove.

[0056] The valve stem sealing part 4132 is disposed at the sealing end of the valve stem part 4131 and is located inside the valve cavity; the sealing end of the valve stem part 4131 is also fitted with a venting sealing ring 414, the diameter of the valve stem sealing part 4132 is larger than the diameter of the valve stem part 4131, and the valve stem sealing part 4132 can abut the venting sealing ring 414 against the valve core mounting part 412 on the outer periphery of the valve core mounting hole 4121 and seal the valve cavity.

[0057] Button 415 is connected to the pressing end of valve core 413 (i.e., valve stem portion 4131), and a vent spring 416 is provided between button 415 and valve core mounting part 412 to drive valve core 413 to seal valve core mounting hole 4121. Therefore, under normal conditions, vent valve 41 is in a closed state, and the inner cavity is isolated from the outside atmosphere. Pressing button 415 can drive valve core 413 to open valve core mounting hole 4121, so that the inner cavity is connected to the outside atmosphere. In addition, a button mounting hole is provided on the first handle portion 311 of handle 34, and button 415 extends out of handle 34 through button mounting hole.

[0058] To allow the vent valve 41 to be fixed on the handle 34, the vent valve 41 also has a vent mounting plate 417. The vent mounting plate 417 is disposed on the valve core mounting member 412 or the valve body 411. In this embodiment, the vent mounting plate 417 is mounted on the valve core mounting member 412. Specifically, the vent mounting plate 417 has an assembly hole, and the edge of the assembly hole is provided with a mounting protrusion 4171. The edge of the valve core mounting member 412 extends with a mounting flange, and the mounting flange has a mounting groove 4122 that matches the mounting protrusion 4171. After the valve core mounting member 412 passes through the assembly hole, the mounting groove 4122 is engaged with the mounting protrusion 4171. At the same time, the valve core mounting member 412 is threadedly connected to the valve body 411, and the vent mounting plate 417 is fixed to the mounting flange of the valve core mounting member 412. In another embodiment, the venting mounting plate 417 may also be integrally formed on the valve core mounting part 412 or the valve body 411.

[0059] like Figure 6 As shown, the first handle portion 311 of the handle 34 is provided with a support portion 342 and a snap-fit ​​portion 343 for mounting the venting mounting plate 417. The support portion 342 includes several L-shaped support blocks for abutting against the venting mounting plate 417; the snap-fit ​​portion 343 consists of several snap-fits for snapping the venting mounting plate 417 onto the support portion 342. Preferably, the second handle portion 321 of the handle 34 is provided with a fixing groove portion 344 for mounting the valve body 411. When the venting valve 41 is pressed, the fixing groove portion 344 provides support and fixation.

[0060] Working principle:

[0061] like Figure 3 As shown, repeatedly pushing the air pump lever 13 causes the gas in the air pump 12 (i.e., the air pumping chamber) to enter the air intake chamber 112 through the air intake check valve 14 and form high-pressure gas. The high-pressure gas pushes the main piston 43 to seal the air outlet of the air outlet pipe 22. At the same time, the high-pressure gas enters the air storage chamber of the air storage cylinder 21. When the pressure value displayed on the pressure gauge reaches the threshold, press the button to open the vent valve 41, so that the air intake chamber 112 is connected to the atmosphere. At this time, under the action of the high-pressure gas in the air storage chamber, the main piston 43 will quickly reset and open the air outlet. The high-pressure gas can be instantly discharged into the blocked pipe through the air outlet pipe 22 to achieve high-pressure unblocking.

[0062] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A pneumatic drain cleaner, characterized in that, include: The air pumping device (1) has a main mounting base (11), an air pump (12) fixed on one side of the main mounting base (11), an air pump rod (13) disposed in the air pump (12), and an air inlet check valve (14) disposed at the air outlet end of the air pump (12). The air storage device (2) has an air storage cylinder (21) installed on the other side of the main mounting base (11), and the air storage chamber of the air storage cylinder (21) is connected to the air pumping chamber of the air pump (12) through the air inlet check valve (14); as well as The housing (3) has a first outer shell (31), a second outer shell (32) and a fixing cover (33) sequentially fitted on the outside of the air pump (12). The fixing cover (33) is fixed to the air inlet end of the air pump (12) and the second outer shell (32) and the first outer shell (31) are sequentially abutted against the main mounting base (11). A handle (34) extends from the side wall of the first housing (31) or / and the second housing (32).

2. The pneumatic drain cleaner according to claim 1, characterized in that, in, A first handle portion (311) extends from the side wall of the first outer casing (31); A second handle portion (321) extends from the side wall of the second outer casing (32); The first handle portion (311) and the second handle portion (321) together form the handle (34).

3. A pneumatic drain cleaner according to claim 2, characterized in that, in, The air pump (12) has a first external thread (121) at its air inlet end, and the fixing cap (33) is provided on the first external thread (121). Or / and, the outer ends of the first handle portion (311) and the second handle portion (321) are together formed with a second external thread portion (341), and a handle nut (35) is provided on the first external thread portion (121).

4. A pneumatic drain cleaner according to claim 2, characterized in that, in, A first connecting edge (312) is formed between the main body of the first outer shell (31) and the first handle portion (311); A second connecting edge (322) is formed between the main body of the second outer shell (32) and the second handle portion (321); In the first connecting edge (312) and the second connecting edge (322), one connecting edge is provided with a slot (323) and the other connecting edge is provided with a strip (313).

5. A pneumatic drain cleaner according to any one of claims 1-4, characterized in that, in, The air pump (12) and the main mounting base (11) are integrally formed.

6. A pneumatic drain cleaner according to any one of claims 1-4, characterized in that, in, The first housing (31) is provided with a pressure gauge mounting part (314), and the pressure gauge mounting part (314) is provided with a viewing window (315); A pressure mounting part (111) communicating with the air storage chamber is provided on one side of the main mounting base (11) where the air pump (12) is located. A pressure display gauge (5) is provided inside the pressure mounting part (111). The pressure display (5) is located inside the pressure gauge mounting part (314), and the display part of the pressure display (5) faces the viewing window (315).

7. A pneumatic drain cleaner according to any one of claims 1-4, characterized in that, in, An air inlet chamber (112) connecting the air pumping chamber and the air storage chamber is provided on one side of the main mounting base (11) where the air storage cylinder (21) is located, and an air release mounting part (113) connecting the air inlet chamber (112) is provided on one side of the main mounting base (11) where the air pump (12) is located; The gas storage device (2) has an outlet pipe (22) disposed in the gas storage cylinder (21), the inner end of which faces the air inlet chamber (112) and the outer end of which extends out of the gas storage cylinder (21); The drain cleaner also includes a venting control device (4), which has: An air release valve (41) is mounted on the handle (34); A venting pipe (42) is provided between the venting mounting part (113) and the venting valve (41); and The main piston (43) is movably disposed in the intake chamber (112) and is used to open or seal the inner end of the outlet pipe (22).

8. A pneumatic drain cleaner according to claim 7, characterized in that, in, The venting pipeline (42) consists of a venting pipe and / or a pipe joint, wherein the venting pipe is a rigid pipe or a flexible pipe.

9. A pneumatic drain cleaner according to claim 7, characterized in that, in, The vent valve (41) has the following features: The valve body (411) has a valve cavity and a connecting joint (4111) for connecting the venting line (42); A valve core mounting component (412) is disposed within the valve cavity and has a valve core mounting hole (4121); A valve core (413) is inserted into the valve core mounting hole (4121), its sealing end is located inside the valve cavity, and a vent sealing ring (414) is fitted thereon; and A button (415) is connected to the pressing end of the valve core (413), and a vent spring (416) is provided between the button (415) and the valve core mounting part (412) for driving the valve core (413) to seal the valve core mounting hole (4121). Pressing the button (415) can drive the valve core (413) to open the valve core mounting hole (4121).

10. A pneumatic drain cleaner according to claim 9, characterized in that, in, The vent valve (41) also has a vent mounting plate (417), which is disposed on the valve core mounting member (412) or the valve body (411). The first handle portion (311) of the handle (34) is provided with a support portion (342) and a buckle portion (343) for mounting the venting mounting plate (417); Or / and, the second handle portion (321) of the handle (34) is provided with a fixing groove (344) for mounting the valve body (411).

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