Piston pump for pipeline dredging device

Abstract

The utility model relates to a piston pump for a pipeline dredging device, which comprises a shell, a cylinder body with two mutually independent piston cavities, a cover body, two pistons corresponding to the two piston cavities, two groups of valve components and a transmission component. Wherein one piston cavity sucks air, the other piston cavity compresses the air at the same time, and when the piston cavity which originally sucks the air is switched to the air compressing state, the other piston cavity is also switched to the air sucking state at the same time, so that alternate cooperative work of the two piston cavities is achieved. The efficiency is higher, the load of the driving motor can be reduced, and the torque is increased, so that the sizes and the weight of the driving motor and the pump are reduced, and the pumping speed is not reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline dredging device technical field, specifically pipeline dredging device piston pump. BACKGROUND

[0002] In the existing pipeline dredging technology, the pump used by many dredging devices is large in size, which brings many inconveniences to actual operation. For example, the traditional high-pressure pipeline dredging machine or air pump type dredging device, due to the large size and weight of the pump, limits its flexibility in narrow space (such as bathroom or kitchen), also increases the operation difficulty, especially in the scene that needs to be moved frequently or handheld operation, the operator often feels helpless when using by hand. At the same time, the large size and weight also make the carrying and storage of the equipment become inconvenient. SUMMARY

[0003] The utility model aims at providing a pipeline dredging device piston pump which is small in size and light in weight.

[0004] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0005] The utility model provides a pipeline dredging device piston pump, which comprises:

[0006] A shell;

[0007] A cylinder body, which is installed on the shell and has two piston cavities arranged independently and side by side;

[0008] A cover body, which is installed on the cylinder body and is provided with two cover body channels corresponding to each piston cavity;

[0009] A valve assembly, which is arranged between the cover body and the cylinder body and is provided with a valve plate and two valve pieces corresponding to each piston cavity, the valve plate has two valve plate channels which are independent and through, and the two valve plate channels can be communicated with the two cover body channels respectively, one of the two valve pieces is arranged on one end of the valve plate channel opposite to the cover body, and the other is arranged on the end of the other valve plate channel away from the cover body, the valve piece has an isolation state and an avoidance state, when the valve piece is in the isolation state, the valve piece blocks the valve plate channel corresponding to it so that the cover body channel corresponding to the valve plate channel is not communicated with the piston cavity, when the valve piece is in the avoidance state, the valve plate channel corresponding to the valve piece is communicated with the cover body channel and the piston cavity corresponding to it;

[0010] A piston, which has two pistons arranged in the two piston cavities respectively; and

[0011] A transmission assembly comprises two eccentric gears mounted on the housing and a driving wheel engaged between the two eccentric gears and connected to the driving motor, two pistons are respectively connected to the eccentric shafts of the two eccentric gears, the driving wheel can drive the two eccentric gears to rotate and bring the two pistons to reciprocate in the corresponding piston cavities, when the eccentric shaft of one of the two eccentric gears moves to the highest point along the preset path, the eccentric shaft of the other moves to the lowest point along the preset path, and when the eccentric shaft of one of the two eccentric gears moves to the lowest point along the preset path, the eccentric shaft of the other moves to the highest point along the preset path.

[0012] Preferably, the rotation axes of the two eccentric gears are located on the same horizontal plane.

[0013] In some embodiments, the two eccentric gears are identical in shape and equal in size.

[0014] Preferably, in the initial state, the eccentric shaft of one of the two eccentric gears is located on the lower side of the eccentric gear, and the eccentric shaft of the other is located on the upper side of the corresponding eccentric gear.

[0015] Preferably, the eccentric gear comprises a first part and a second part arranged in half, the weight of the first part is greater than that of the second part, and the eccentric shaft of the eccentric gear is mounted on the second part.

[0016] Preferably, the cover body is provided with a stopper for limiting the movement distance of the valve sheet between the cover body and the valve plate.

[0017] Further preferably, the stopper is arranged in the cover body channel and extends towards the valve plate.

[0018] Preferably, a sealing member is arranged between the valve plate channel and the corresponding cover body channel.

[0019] Preferably, a sealing member is arranged between the valve sheet and the valve plate channel.

[0020] Preferably, one end of the valve sheet is a fixed end, and the other end is a movable free end, and the fixed end is fixedly connected to the valve plate.

[0021] Preferably, the piston comprises a piston body mounted in the piston cavity and a piston rod connected to one end of the piston body, and the other end of the piston rod has an annular portion sleeved on the eccentric shaft.

[0022] Preferably, the cover body, the valve assembly and the cylinder body are fastened and connected by bolts.

[0023] Thanks to the above technical scheme, the present application has the following advantages compared with the prior art:

[0024] The piston pump of this invention includes a housing, a cylinder with two independent piston chambers, a cover, two pistons corresponding to the two piston chambers, two sets of valve assemblies, and a transmission assembly. When the transmission assembly drives the two pistons to reciprocate in the two piston chambers respectively, the two pistons move in opposite directions. When one piston chamber draws in gas, the other piston chamber compresses gas, and when the piston chamber compresses gas, the other piston chamber can draw in gas again, thereby realizing the alternating and coordinated work of the two piston chambers. Compared with the existing intermittent piston pumps, it is more efficient, can reduce the load on the drive motor, increase torque, and thus help to reduce the size and weight of the drive motor and pump, without reducing the pumping speed. Attached Figure Description

[0025] Figure 1 A schematic diagram of a piston pump provided in Example 1;

[0026] Figure 2 A front view of a piston pump provided in Embodiment 1;

[0027] Figure 3 A schematic diagram of the structure of the cover provided in Example 1;

[0028] Figure 4 This is a structural schematic diagram of the cover provided in Example 1 from another angle;

[0029] Figure 5 This is a schematic diagram of the valve plate provided in Example 1;

[0030] Figure 6 This is a structural schematic diagram of the valve plate from another angle provided in Example 1;

[0031] Figure 7 This is a schematic diagram of the valve plate provided in Example 1;

[0032] Figure 8 A schematic diagram of the piston provided in Example 1;

[0033] Among them, 1. Shell;

[0034] 2. Cover; 21. Cover channel; 22. Air outlet; 23. Air inlet; 24. Stop;

[0035] 3. Valve plate; 31. Valve plate channel; 32. Upper side of valve plate; 33. Lower side of valve plate; 34. First sealing groove; 35. Second sealing groove; 36. Mounting groove; 37. Mounting protrusion;

[0036] 4. Valve plate; 41. Mounting hole;

[0037] 5. Piston; 51. Piston body; 52. Piston rod; 53. Annular part;

[0038] 6. Transmission assembly; 61. Eccentric gear; 611. First part; 612. Second part; 613. Eccentric shaft; 62. Drive wheel;

[0039] 7. Cylinder block. Detailed Implementation

[0040] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0041] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower," etc., indicate the orientation or positional relationship as described above. Figure 1 The orientations shown are defined, such as the orientation of the cover 2 being "upper" and the orientation of the transmission component 6 being "lower". This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0045] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0046] Example 1

[0047] A piston pump for a pipe unclogging device, such as Figures 1 to 8 As shown, it includes a housing 1, a cylinder 7, a cover 2, a valve assembly, a piston 5, and a transmission assembly 6.

[0048] See Figure 1 and Figure 2 The cylinder body 7 is mounted on the housing 1 and has two independent and parallel piston chambers. In this embodiment, the cylinder body 7 has two cylinder bodies arranged in parallel along the length of the housing 1. Each cylinder body has a piston chamber that extends and penetrates in the vertical direction. One end of the cylinder body 7 is fixedly connected to the housing 1. The fixed connection method includes, but is not limited to, welding, integral molding, etc., and no specific limitation is imposed.

[0049] The cover 2 is mounted on the other end of the cylinder block 7. Each piston chamber of the cover 2 has two independent cover channels 21. One cover channel 21 is a cover intake channel for air intake; the other cover channel 21 is a cover outlet channel for air exhaust. (See also...) Figure 3 and Figure 4 In this embodiment, the air inlet 23 of the cover air inlet channel and the air outlet 22 of the cover air outlet channel are located on the side of the cover 2, while the air outlet of the cover air inlet channel and the air inlet of the cover air outlet channel are located at the bottom of the cover 2.

[0050] The valve assembly is located between the cover 2 and the cylinder 7, with a valve plate 3 and two valve discs 4 corresponding to each piston chamber. One side of the valve plate 3 has a mounting groove 36 that matches the cylinder 7, for insertion into the upper end of the cylinder 7 for connection. The valve plate 3 has two independent and through valve plate channels 31, one of which communicates with one cover channel 21, and the other with the other cover channel 21. That is, one valve plate channel 31 is the valve plate inlet channel, and the other is the valve plate outlet channel. A second sealing groove 35 is also provided on the outer periphery of the valve plate inlet and outlet channels opposite to the cover 2, for installing a sealing element such as a rubber ring to ensure a tight seal. One of the two valve discs 4 is located on the end of one of the two valve plate channels 31 opposite to the cover 2, and the other is located on the other end of the two valve plate channels 31 opposite to the cover 2. In this embodiment, a valve plate 4 is provided on the end of the valve plate air outlet channel opposite to the cover 2, and a valve plate 4 is provided on the end of the valve plate air inlet channel opposite to the cover 2. That is, a valve plate 4 is provided on the upper side 32 and the lower side 33 of the valve plate. Preferably, a first sealing groove 34 is provided on the outer periphery of the end of the valve plate air outlet channel opposite to the cover 2 and the end of the valve plate air inlet channel opposite to the cover 2, for installing a sealing element such as a rubber ring to ensure the sealing between the valve plate 4 and the valve plate channel 31.

[0051] Furthermore, the valve plate 4 has an isolation state and an avoidance state. When the valve plate 4 is in the isolation state, it blocks the valve plate channel 31 corresponding to it, so that the piston chamber is not connected to the cover channel 21 corresponding to the valve plate channel 31. When the valve plate 4 is in the avoidance state, the valve plate channel 31 corresponding to the valve plate 4 is connected to the cover channel 21 and the piston chamber. That is, when air is intake, the valve plate 4 located on the valve plate outlet channel is in the isolation state, so that the cover outlet channel is not connected to the valve plate outlet channel and the piston chamber, while the valve plate 4 located on the valve plate inlet channel is in the avoidance state, so that the cover inlet channel, the valve plate inlet channel and the piston chamber are connected; when air is exhaust, the valve plate 4 located on the valve plate outlet channel is in the avoidance state, so that the cover outlet channel is connected to the valve plate outlet channel and the piston chamber, while the valve plate 4 located on the valve plate inlet channel is in the isolation state, so that the cover inlet channel is not connected to the valve plate inlet channel and the piston chamber.

[0052] Preferably, the valve plate 4 is an elastic plate with one fixed end and the other a movable free end, the fixed end being fixedly connected to the valve plate 3. In this embodiment, the valve plate 3 is provided with a mounting protrusion 37, and the valve plate 4 is provided with a corresponding mounting hole 41. The two can be fixed by inserting the mounting protrusion 37 into the mounting hole 41 and using a stamping method. Of course, other fixing methods can also be used, without particular limitation. In order to prevent the valve plate 4 from deforming, the cover 2 is provided with a stop 24, which is used to limit the movement distance of the valve plate 4 between the cover 2 and the valve plate 3, and to prevent the valve plate 4 from flipping over and becoming unrecoverable under gas impact. In this embodiment, the stop 24 is provided in the gas outlet channel of the cover and extends in a direction close to the valve plate 3.

[0053] The cover 2, valve assembly and cylinder 7 are fastened together by bolts.

[0054] The piston 5 has two pistons respectively disposed in two piston chambers. Taking one of them as an example, the piston 5 includes a piston body 51 movably disposed in the piston chamber, a piston rod 52 connected to one end of the piston body 51, and an annular portion 53 connected to the other end of the piston rod 52. Preferably, the piston body 51, piston rod 52, and annular portion 53 are integrally formed. To ensure the sealing between the piston 5 and the piston chamber, an elastic sleeve, such as a rubber sleeve, may optionally be fitted on the outside of the piston body 51.

[0055] The transmission assembly 6 includes two eccentric gears 61 and a drive wheel 62. The two eccentric gears 61 are rotatably mounted on the housing 1 and located directly below the two piston chambers, respectively. The drive wheel 62 meshes between the two eccentric gears 61. The annular portions 53 of the two pistons 5 are respectively sleeved on the eccentric shafts 613 of the two eccentric gears 61, enabling the pistons 5 to reciprocate within their respective piston chambers under the drive of the eccentric gears 61. Initially, the eccentric shaft 613 of one of the two eccentric gears 61 is located below the rotation axis of that eccentric gear 61, while the eccentric shaft 613 of the other eccentric gear 61 is located above the rotation axis of its corresponding eccentric gear 61. The drive wheel 62 is connected to the drive motor. When the drive wheel 62 rotates under the drive of the drive motor, it drives the two eccentric gears 61 to rotate, thereby causing the two pistons 5 to reciprocate in their corresponding piston chambers. When the eccentric shaft 613 of one of the two eccentric gears 61 moves to the highest point along a preset path, the eccentric shaft 613 of the other moves to the lowest point along the preset path; when the eccentric shaft 613 of one of the two eccentric gears 61 moves to the lowest point along the preset path, the eccentric shaft 613 of the other moves to the highest point along the preset path, so that the movement direction of the pistons 5 is opposite, that is, one of the two pistons 5 moves upward to compress the piston chamber to discharge air, and the other moves downward to intake air. Preferably, the rotation axes of the two eccentric gears 61 are located on the same horizontal plane, and the two eccentric gears 61 are the same shape and equal in size.

[0056] Furthermore, in order to facilitate the rotation of the eccentric gear 61, the eccentric gear 61 includes a first part 611 and a second part 612 that are set in half. The weight of the first part 611 is greater than that of the second part 612, and the eccentric shaft 613 of the eccentric gear 61 is mounted on the second part 612.

[0057] Working principle:

[0058] The drive motor is started, causing the drive wheel 62 to rotate clockwise (it can also rotate clockwise, there is no restriction). The eccentric gear 61 on the right rotates counterclockwise, and the piston 5 on it moves downward under the drive of the eccentric shaft 613, which increases the volume of the piston chamber on the right and reduces the pressure, forming a negative pressure zone. The valve plate 4 on the valve plate intake channel is pushed open by atmospheric pressure, and gas is drawn into the piston chamber. At the same time, the eccentric gear 61 on the left rotates counterclockwise, and the piston 5 on it moves upward under the drive of the eccentric wheel. The volume of the piston chamber on the left decreases and the pressure increases, thereby opening the valve plate 4 on the exhaust channel, and the gas in the piston chamber is pushed out. When the eccentric shaft 613 on the right eccentric gear 61 moves from the highest point to the lowest point along the preset path, the piston chamber on the right side completes the intake. At the same time, the eccentric shaft 613 on the left eccentric gear 61 moves from the lowest point to the highest point along the preset path, and the piston chamber on the left side completes the exhaust. When both continue to rotate, the piston chamber on the right side switches to the exhaust state, while the piston chamber on the left side switches to the intake state, ensuring that when the piston pump is working, there is always one piston chamber intake and the other piston chamber exhaust.

[0059] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A piston pump for a pipe unclogging device, characterized in that, include: Shell (1); The cylinder (7) is mounted on the housing (1) and has two independent and parallel piston chambers; The cover (2) is mounted on the cylinder (7) and has two independent cover channels (21) for each piston chamber; A valve assembly is provided between the cover (2) and the cylinder (7), and each piston chamber is provided with a valve plate (3) and two valve discs (4). The valve plate (3) has two independent and through valve plate channels (31), which can be connected to two cover channels (21) respectively. One of the two valve discs (4) is located on the end of either of the two valve plate channels (31) opposite to the cover (2), and the other is located on the other end of the two valve plate channels (31) opposite to the cover (2). The valve disc (4) has an isolation state and a clearance state. When it is in the isolation state, the valve disc (4) blocks the valve plate channel (31) corresponding to it so that the cover channel (21) corresponding to the valve plate channel (31) is not connected to the piston chamber. When the valve disc (4) is in the clearance state, the valve plate channel (31) corresponding to the valve disc (4) is connected to the cover channel (21) and the piston chamber. Piston (5), which has two pistons located in two piston chambers; as well as, The transmission assembly (6) includes two eccentric gears (61) mounted on the housing (1) and a drive wheel (62) meshing between the two eccentric gears (61) and connected to the drive motor. Two pistons (5) are respectively connected to the eccentric shafts (613) of the two eccentric gears (61). The drive wheel (62) can drive the two eccentric gears (61) to rotate and carry the two pistons (5) to reciprocate in their corresponding piston chambers. When the eccentric shaft (613) of one of the two eccentric gears (61) moves to the highest point along a preset path, the eccentric shaft (613) of the other moves to the lowest point along a preset path. When the eccentric shaft (613) of one of the two eccentric gears (61) moves to the lowest point along a preset path, the eccentric shaft (613) of the other moves to the highest point along a preset path.

2. The piston pump for the pipe dredging device according to claim 1, characterized in that, The rotational axes of the two eccentric gears (61) are located on the same horizontal plane; and / or, The two eccentric gears (61) are identical in shape and equal in size.

3. The piston pump for the pipe dredging device according to claim 2, characterized in that, In the initial state, the eccentric shaft (613) of one of the two eccentric gears (61) is located below the rotation axis of the eccentric gear (61), and the eccentric shaft (613) of the other is located above the rotation axis of its corresponding eccentric gear (61).

4. The piston pump for the pipe dredging device according to claim 1, characterized in that, The eccentric gear (61) includes a first part (611) and a second part (612) that are set in half. The weight of the first part (611) is greater than that of the second part (612). The eccentric shaft (613) of the eccentric gear (61) is mounted on the second part (612).

5. The piston pump for the pipe dredging device according to claim 1, characterized in that, The cover (2) is provided with a stop (24) to limit the movement distance of the valve plate (4) between the cover (2) and the valve plate (3).

6. The piston pump for the pipe dredging device according to claim 5, characterized in that, The stop (24) is located inside the cover channel (21) and extends toward the valve plate (3).

7. The piston pump for the pipe dredging device according to claim 1, characterized in that, A sealing element is provided between the valve plate channel (31) and its corresponding cover channel (21).

8. The piston pump for the pipe dredging device according to claim 1, characterized in that, A sealing element is provided between the valve plate (4) and the valve plate channel (31).

9. The piston pump for the pipe dredging device according to claim 1, characterized in that, One end of the valve plate (4) is a fixed end, and the other end is a movable free end. The fixed end is fixedly connected to the valve plate (3).

10. The piston pump for the pipe dredging device according to claim 1, characterized in that, The piston (5) includes a piston body (51) mounted in the piston chamber and a piston rod (52) with one end connected to the piston body (51). The other end of the piston rod (52) has an annular portion (53), which is sleeved on the eccentric shaft (613); and / or, The cover (2), valve assembly and cylinder (7) are fastened together by bolts.

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