Pumping devices, pumping systems and concrete machinery

Abstract

This invention discloses a pumping device, a pumping system, and concrete machinery. The pumping device includes a water tank and a water-blocking mechanism. The water tank includes a first vertical plate, a second vertical plate, and a water-containing chamber. The first and second vertical plates are spaced apart from each other, with the first vertical plate near the pumping cylinder of the pumping system and the second vertical plate near the concrete cylinder of the pumping system. The water-blocking mechanism includes a partition and a sealing assembly. The partition is disposed between the first and second vertical plates to define the water-containing chamber between them. The partition has a through hole for a piston rod to pass through. The sealing assembly is disposed in the through hole and configured to block water adhering to the piston rod. The pumping device of this invention can effectively filter water adhering to the piston rod surface and has a simple structure that is easy to implement.

Description

Technical Field

[0001] This invention relates to the field of concrete machinery technology, and more specifically to a pumping device, a pumping system, and concrete machinery. Background Technology

[0002] For pumping devices with a water tank structure, the goal of structural design is to connect the concrete cylinder and the pumping cylinder, ensuring the coaxiality accuracy between them, while also cooling and lubricating the concrete piston to achieve continuous concrete transport. Pumping devices with water tank structures are commonly used in concrete machinery such as concrete pump trucks, truck-mounted pumps, and trailer pumps.

[0003] Currently, the water tank of common pumping devices mainly includes the pumping cylinder vertical plate, concrete cylinder vertical plate, side plate, bottom plate, water outlet seat, and connecting ribs. During pumping system operation, the piston rod reciprocates within the water tank to achieve material suction and delivery. Therefore, water inevitably adheres to the surface of the piston rod. The cylinder end cap sealing assembly alone cannot effectively filter this adhering water completely. Furthermore, as the seals wear down, the sealing effect deteriorates. Prolonged operation can easily lead to excessive water content in the hydraulic oil within the pumping system, causing hydraulic oil emulsification. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems existing in the prior art and provide a pumping device, pumping system and concrete machinery. The pumping device can effectively filter the water adhering to the surface of the piston rod, and has a simple structure and is easy to implement.

[0005] To achieve the above objectives, the present invention provides a pumping device comprising a water tank and a water-blocking mechanism; the water tank comprising a first vertical plate, a second vertical plate, and a water-containing chamber; the first vertical plate and the second vertical plate are spaced apart from each other, the first vertical plate being close to the pumping cylinder of the pumping system, and the second vertical plate being close to the concrete cylinder of the pumping system; the water-blocking mechanism comprising a partition and a sealing assembly; the partition is disposed between the first vertical plate and the second vertical plate to define the water-containing chamber between the partition and the second vertical plate, the partition having a through hole for a piston rod to pass through, and the sealing assembly being disposed in the through hole and configured to block water adhering to the piston rod.

[0006] Optionally, the inner wall of the through hole has a water-retaining groove; the sealing assembly is configured to block adhering water on the piston rod in the water-retaining groove.

[0007] Optionally, the partition has a drainage channel, one end of which is connected to the water tank, and the other end is used to connect to the outside.

[0008] Optionally, a drainage chamber is defined between the partition and the first upright plate, and the other end of the drain channel is connected to the drainage chamber. The bottom of the drainage chamber is provided with a drain hole that communicates with the outside. Alternatively, the other end of the drain channel extends to the side wall of the partition and communicates directly with the outside.

[0009] Optionally, the partition has an airflow channel, one end of which is connected to the through hole, and the other end is used to connect to an external air source.

[0010] Optionally, the water-blocking mechanism includes an infrared heating component disposed between the partition and the first vertical plate, the infrared heating component being configured to perform infrared drying treatment on the surface of the piston rod.

[0011] Optionally, the infrared heating component is configured to detect the temperature of the piston rod surface and adjust the heating power according to the temperature.

[0012] Optionally, the water-blocking mechanism includes dustproof rings disposed at both ends of the through hole.

[0013] Through the above technical solution, at least a portion of the piston rod will reciprocate through the water-containing chamber during its movement. When the piston rod returns, the water adhering to its surface is blocked by the sealing assembly, thus achieving the first stage of filtration. Subsequently, as the piston rod continues its return motion, the end cap sealing assembly of the pumping cylinder performs a second stage of filtration. The pumping device of this invention can significantly prevent water adhering to the piston rod surface from entering the pumping cylinder, effectively reducing the water content in the hydraulic oil, minimizing premature emulsification, and extending the service life of the pumping cylinder.

[0014] A second aspect of the present invention provides a pumping system comprising a pumping cylinder, a concrete cylinder, and the aforementioned pumping device; the piston rod of the pumping cylinder passes through a partition of the pumping device, and a concrete piston connected to the end of the piston rod (610) is located in the concrete cylinder (700).

[0015] The present invention also provides a concrete machinery, which includes the above-described pumping system.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 This is a front view of the pumping device of the present invention;

[0018] Figure 2This is a cross-sectional view along line AA of the first embodiment of the pumping device of the present invention;

[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of part B in the middle;

[0020] Figure 4 This is a top view of the first embodiment of the pumping device of the present invention;

[0021] Figure 5 This is a cross-sectional view along line AA of a second embodiment of the pumping device of the present invention;

[0022] Figure 6 yes Figure 5 An enlarged schematic diagram of section C;

[0023] Figure 7 This is a top view of a second embodiment of the pumping device of the present invention;

[0024] Figure 8 This is a top view of a third embodiment of the pumping device of the present invention;

[0025] Figure 9 This is a top view of the fourth embodiment of the pumping device of the present invention;

[0026] Figure 10 This is a schematic diagram of one embodiment of the pumping system of the present invention.

[0027] Explanation of reference numerals in the attached figures

[0028] 110 - First upright plate, 120 - Second upright plate, 130 - Water-containing chamber, 140 - Drainage chamber, 141 - Drain hole

[0029] 200-partition, 210-through hole, 211-water tank, 220-drainage channel, 230-airflow channel.

[0030] 300 - Sealing assembly

[0031] 400-Infrared heating component,

[0032] 500-dust ring,

[0033] 600 - Pumping cylinder, 610 - Piston rod

[0034] 700-Concrete Cylinder Detailed Implementation

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] In existing technologies, the water tank of common pumping devices mainly includes a pumping cylinder vertical plate, a concrete cylinder vertical plate, side plates, a bottom plate, a drain seat, and connecting ribs. During pumping system operation, at least a portion of the piston rod reciprocates within the water tank. Therefore, water inevitably adheres to the surface of the piston rod. The cylinder end cap sealing assembly alone cannot effectively and completely filter this adhering water. Furthermore, as the seals wear down, the sealing effect deteriorates, and prolonged operation can easily lead to excessive water content in the hydraulic oil within the pumping system, causing hydraulic oil emulsification.

[0037] To solve the above-mentioned technical problems, the present invention provides the following pumping device.

[0038] The pumping device of the present invention includes a water tank and a water blocking mechanism; the water tank includes a first vertical plate 110, a second vertical plate 120 and a water-containing chamber 130; the first vertical plate 110 and the second vertical plate 120 are spaced apart from each other, the first vertical plate 110 is close to the pumping cylinder 600 of the pumping system, and the second vertical plate 120 is close to the concrete cylinder 700 of the pumping system; the water blocking mechanism includes a partition 200 and a sealing assembly 300; the partition 200 is disposed between the first vertical plate 110 and the second vertical plate 120 to define the water-containing chamber 130 between the partition 200 and the second vertical plate 120, the partition 200 has a through hole 210 for the piston rod 610 to pass through, and the sealing assembly 300 is disposed in the through hole 210 and configured to block water adhering to the piston rod 610.

[0039] Since at least a portion of the piston rod 610 travels back and forth within the water-receiving chamber 130 during its movement, the water adhering to the surface of the piston rod 610 is blocked by the sealing component 300 during its return stroke. This achieves the first stage of filtration of the water adhering to the surface of the piston rod 610. Subsequently, as the piston rod 610 continues its return stroke, the end cap sealing component of the pumping cylinder 600 performs a second stage of filtration of the water adhering to the surface of the piston rod 610. Through the pumping device of this invention, the water adhering to the surface of the piston rod 610 can be significantly prevented from entering the pumping cylinder 600, effectively reducing the water content in the hydraulic oil, minimizing premature emulsification of the hydraulic oil, and extending the service life of the pumping cylinder 600.

[0040] Furthermore, the inner wall of the through hole (210) has a water-retaining groove (211); the sealing assembly (300) is configured to block adhering water on the piston rod (610) in the water-retaining groove (211). The advantage of this arrangement is that it increases the volume for holding water and further prevents adhering water from flowing through the through hole 210 to the first upright plate 110.

[0041] It should be noted that, in one embodiment of the present invention, such as Figure 3As shown, the water tank 211 is formed by the U-shaped or V-shaped notch of the sealing component and the inner wall of the groove on the through hole 210.

[0042] To further enhance the water-blocking effect of the water-blocking mechanism, preferably, the partition 200 may have a drainage channel 220, one end of which is connected to the water-receiving tank 211, and the other end is used to connect to the outside. In this embodiment, the water adhering to the surface of the piston rod 610 is blocked by the sealing assembly 300 in the water-receiving tank 211 on the inner wall of the through hole 210, and then discharged to the outside through the drainage channel 220, thereby fully utilizing the waterproof performance of the water-blocking mechanism and further improving the water-blocking effect.

[0043] It should be understood that the drainage channel 220 can be designed in various ways, as long as it can drain the water in the water tank 211 to the outside. In one embodiment of the present invention, such as Figures 2 to 8 As shown, a drainage chamber 140 is defined between the partition 200 and the first vertical plate 110. The other end of the drain channel 220 is connected to the drainage chamber 140. The bottom of the drainage chamber 140 is provided with a drain hole 141 that communicates with the outside.

[0044] In this embodiment, the drainage chamber 140 can store water flowing out of the drain channel 220 to a certain extent, which undoubtedly provides wider applicability for some working conditions where it is impossible to directly discharge the attached water from the drain channel 220 to the outside.

[0045] In the above embodiment, there can be multiple partitions 200, and the number of sealing components 300 corresponds one-to-one with the number of partitions 200. The partition 200 closest to the first upright plate 110 defines a drainage chamber 140 between itself and the first upright plate 110. The drainage channel 220 of each partition 200 can guide water to the drainage chamber 140. Of course, only one partition 200 can be provided, and multiple sealing components 300 can be provided in the through hole 210 of the partition 200. The partition 200 is provided with one or more interconnected drainage channels 220, and each drainage channel 220 is connected to the water tank 211 of the through hole 210.

[0046] By setting multiple baffles 200 or multiple sealing components 300, the water-blocking effect can be further improved.

[0047] In another embodiment of the invention, such as Figure 9 As shown, the other end of the drainage channel 220 extends to the side wall of the partition 200 and is directly connected to the outside. The advantage of this design is that it undoubtedly provides a more efficient drainage structure for some working conditions where the attached water can be directly discharged from the drainage channel 220 to the outside.

[0048] In the above embodiments, there can be multiple partitions 200, and the number of sealing components 300 corresponds one-to-one with the number of partitions 200. The drainage channel 220 of each partition 200 can directly drain water to the outside. Of course, only one partition 200 can be provided, and multiple sealing components 300 can be provided in the through hole 210 of the partition 200. The partition 200 is provided with one or more interconnected drainage channels 220 or multiple independent drainage channels 220.

[0049] In order to minimize the amount of water adhering to the surface of the piston rod 610 during its return stroke, in one embodiment of the present invention, such as... Figures 5 to 7 As shown, the partition 200 may have an airflow channel 230, one end of which is connected to the through hole 210, and the other end is used to connect to an external air source. The air source may be ordinary pressurized gas, high-pressure gas, or high-temperature and high-pressure gas. Preferably, the airflow channel 230 can be supplied with gas at a certain temperature (within the adaptable temperature range of the sealing component 300). On the one hand, the increase in temperature can reduce the viscosity of the water film on the surface of the piston rod 610. On the other hand, the airflow can change the thickness of the water film, making it easier for it to be blocked and scraped off by the sealing component 300, thus significantly reducing the possibility of water molecules adhering to the surface of the piston rod 610.

[0050] Specifically, the airflow channel 230 can be configured to be perforated from the top of the partition 200 to the through hole 210 to connect an external air source from the top of the water tank of the pumping device. Alternatively, the airflow channel 230 can be configured to connect an external air source from the side of the partition 200.

[0051] In order to minimize the amount of water adhering to the surface of the piston rod 610 during its return stroke, in one embodiment of the present invention, such as... Figure 8 As shown, the water-blocking mechanism includes an infrared heating component 400 disposed between the partition 200 and the first vertical plate 110. The infrared heating component 400 is configured to perform infrared drying treatment on the surface of the piston rod 610.

[0052] Before the piston rod 610 returns to the pumping cylinder 600, it is heated non-contactly by infrared heat radiation generated by a radiation source (the heating temperature is controlled within the temperature range that the rod seal can adapt to), so that the moisture on the surface of the piston rod 610 evaporates. The surface drying treatment technology of the piston rod 610 can greatly reduce the probability of water entering the pumping cylinder 600.

[0053] Preferably, the infrared heating component 400 is configured to detect the surface temperature of the piston rod 610 and adjust the heating power accordingly. For example, a temperature feedback adjustment device, such as a temperature sensor, can be added between the first vertical plate 110 and the partition plate 200 to detect the temperature near the piston rod 610, thereby achieving feedback control of the infrared heating component 400. Based on temperature changes, when the surface temperature of the piston rod 610 is detected to be below a preset working range, the infrared heating component 400 starts working; when the surface temperature of the piston rod 610 is detected to be above the preset working range, the infrared heating component 400 stops working, thus adjusting the working status of the infrared heating component 400 in real time.

[0054] In order to ensure the service life of the sealing assembly 300, in one embodiment of the present invention, the water blocking mechanism includes dust rings 500 disposed at both ends of the through hole 210.

[0055] In the above embodiments, the installation method of the partition 200 can be either welded or detachable. Figures 1 to 9 The diagram shows the form in which the partition 200 is welded to the water tank. When a detachable type is selected, it can be fastened with screws, for example, but proper sealing measures must be taken between the partition 200 and the side and bottom plates of the water tank.

[0056] like Figure 10 As shown, the present invention also provides a pumping system, which includes a pumping cylinder 600, a concrete cylinder 700, and the above-mentioned pumping device; the piston rod 610 of the pumping cylinder 600 passes through the through hole of the partition 200 of the pumping device, and part of the piston rod 610 is located in the water-containing chamber 130 of the pumping device, and the end of the piston rod 610 of the pumping cylinder 600 is connected to a concrete piston located in the concrete cylinder 700.

[0057] The present invention also provides a concrete machinery comprising the above-described pumping system.

[0058] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A pumping device, characterized in that, The pumping device includes a water tank and a water-blocking mechanism; The water tank includes a first vertical plate (110), a second vertical plate (120), and a water-containing chamber (130); the first vertical plate (110) and the second vertical plate (120) are spaced apart from each other, the first vertical plate (110) is close to the pumping cylinder (600) of the pumping system, and the second vertical plate (120) is close to the concrete cylinder (700) of the pumping system. The water-blocking mechanism includes a partition (200) and a sealing assembly (300); the partition (200) is disposed between the first upright plate (110) and the second upright plate (120) to define the water-containing chamber (130) between the partition (200) and the second upright plate (120), the partition (200) having a through hole (210) for the piston rod (610) to pass through, and the sealing assembly (300) is disposed in the through hole (210) and configured to block water adhering to the piston rod (610); The partition (200) has an airflow channel (230), one end of which is connected to the through hole (210), and the other end is used to connect to an external air source. The airflow channel (230) introduces gas at a certain temperature through the air source, thereby reducing the viscosity of the water film on the surface of the piston rod (610). The water-blocking mechanism includes an infrared heating component (400) disposed between the partition (200) and the first upright plate (110), the infrared heating component (400) being configured to perform infrared drying treatment on the surface of the piston rod (610).

2. The pumping device according to claim 1, characterized in that, The inner wall of the through hole (210) has a water-receiving groove (211); the sealing assembly (300) is configured to block adhering water on the piston rod (610) in the water-receiving groove (211).

3. The pumping device according to claim 2, characterized in that, The partition (200) has a drainage channel (220), one end of which is connected to the water tank (211), and the other end is used to connect to the outside.

4. The pumping device according to claim 3, characterized in that, The partition (200) and the first upright plate (110) define a drainage chamber (140), and the other end of the drain channel (220) is connected to the drainage chamber (140). The bottom of the drainage chamber (140) is provided with a drain hole (141) that communicates with the outside; or, the other end of the drain channel (220) extends to the side wall of the partition (200) and communicates directly with the outside.

5. The pumping device according to claim 1, characterized in that, The infrared heating component (400) is configured to detect the temperature of the surface of the piston rod (610) and adjust the heating power according to the temperature.

6. The pumping device according to any one of claims 1-5, characterized in that, The water-blocking mechanism includes dustproof rings (500) disposed at both ends of the through hole (210).

7. A pumping system, characterized in that, The pumping system includes a pumping cylinder (600), a concrete cylinder (700), and a pumping device as described in any one of claims 1-6; The piston rod (610) of the pumping cylinder (600) passes through the partition (200) of the pumping device, and the concrete piston connected to the end of the piston rod (610) is located in the concrete cylinder (700).

8. A type of concrete machinery, characterized in that, The concrete machinery includes the pumping system as described in claim 7.

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