WO2006133929A1

WO2006133929A1 - Manual piston suction pump

Info

Publication number: WO2006133929A1
Application number: PCT/EP2006/005738
Authority: WO
Inventors: Wolfgang Schelzke
Original assignee: Richter Spielgeräte GmbH
Priority date: 2005-06-14
Filing date: 2006-06-14
Publication date: 2006-12-21
Also published as: DE202005009318U1

Abstract

The invention relates to a manual piston suction pump, comprising a pump base, a pump column, a liquid outlet opening and a pump piston, connected to a pump clapper which may lift liquid into the riser tube on an inlet stroke. The piston suction pump is designed to be supplied from an external liquid source, the device necessary for provision and supply of liquid being housed in the pump base.

Description

Hand operated piston suction pump

The invention relates to a piston suction pump which is used to deliver liquid and which is adapted to be supplied by an external source of liquid, and is suitable for use in children's playgrounds.

Such piston suction pumps are used in particular for the extraction of groundwater from near-surface earth layers. For this purpose, a ram is struck into the ground, whose length is chosen according to the groundwater level. If the water quantity and quality is sufficient, a direct withdrawal from the groundwater is possible. However, the maximum suction height should not exceed 2.5 m to ensure smooth running. If the prerequisites for setting up a piston suction pump with a ram tube are not met, there is a suction container or a valve combination, which are connected to an external source, available as further water supply options. In the case of the suction tank, a water tank is installed in a well near the pump, and the water flow is regulated from the pressure pipe by means of a float valve housed in the suction tank. The second water supply option includes a valve assembly with a surge tank, which is also installed in a well near the pump. In this variant, the water flow is regulated by direct connection to the pressure line.

FIG. 1 a schematically illustrates a prior art piston suction pump 100 which comprises a pump base 101, a pump column 102, a fluid outlet opening 106 and a pump piston 103. Furthermore, the piston suction pump 100 in Fig. 1a shows a hot galvanized Windkessel hood 105, which is provided with two bearings made of brass and connected to the pump handle 104, a hot-dip galvanized Nasenstechventil 108 with a seal, the Nasenstechventil 108 is made precisely for the riser. In this embodiment, it is necessary to establish communication between the piston suction pump 100 and the valve combination consisting of 110 and 111 housed in a shaft 112. As a connection for these two components, in particular, a conventional suction and pressure-resistant spiral tube, which is surrounded by a protective tube, wherein the protective tube a few centimeters from a concrete base 107, on which the piston suction pump 100 mounted is, survives, so that no water reflux in the well 112 can arise. In the well 112, which typically has an inner diameter of 100 cm and a depth of 80 cm, the components of the valve combination 110 and 111 are accommodated, which connect the spiral tube 109 of the Kolbensaugpumpe 100 with the connection to a water supply 113. At the inlet to the valve combination 110 and 111 is the pressure reducing valve 111, whose task is to keep the water pressure and the amount of water constantly uniformly stable. A special surge tank 115, which typically holds a volume of 12 liters of liquid, has the task of producing a uniform flow of water. Due to the occurring jerky water withdrawals by the piston suction pump pressure surges are avoided in the supply system. At the outlet of the valve combination, between the pressure reducing valve 111 and the spiral hose connection 109, there is a diaphragm valve 110. The diaphragm valve 110 is designed so that it is specially adapted to the piston suction pump 100, the pressure reducing valve 111 and the pressure equalizing tank 115. Upon actuation of the pump rocker 104 down the pump piston 103 goes up and opens the diaphragm valve 110 by the occurring vacuum, so that liquid can be pulled out of the surge tank 115.

FIG. 1b shows another prior art piston suction pump 100 which includes the same components as the piston suction pump 100 of FIG. 1a. In a shaft 118, which is formed in the immediate vicinity of the piston suction pump 100, however, a suction container 119 is housed instead of the valve combination 110 and 111. Through an opening in the suction tank 119, water is supplied from the supply pipe and stored in the suction tank 119. The top of the suction tank 119 is provided with an opening 123 through which the spiral hose 109 leading to the piston suction pump 100 is passed, with the end of the spiral hose 109 reaching to the lower edge of the suction tank 119. One side surface of the suction container 119 is provided with two further openings 120 and 122. The opening 122 is mounted on the lower edge of the suction box side surface and provided with a screw thread to which a drain plug is attached. When cleaning the suction container 119, the drainage screw is removed to completely drain the water and remove impurities and bacterial foci can. The second opening 120 is mounted in the upper portion of the side surface of the suction container 119, and formed so that a rod 121 for holding a float valve 124 can be performed. Of the Rod 121 consists of two parts, the ends of which can be connected by means of a sleeve directly to the opening. The water level in the suction tank 119 can thus be regulated by means of the automatic float valve 124.

The suction container and the valve combination for water supply have the disadvantage that they require special structural measures, which are on the one hand very time consuming and on the other hand cause high costs. Another disadvantage resulting from the use of a suction tank is water quality. Since the suction container is filled up with water and after refilling only refilled, but the water is not replaced, impurities and bacterial foci can not be absolutely excluded. Thus, it proves necessary to clean the suction container from time to time, which is accomplished by means of a drainage screw, which is attached to the outer lower end of a side surface of the suction tank. This second-time cleaning process proves to be an additional disadvantageous criterion. The piston suction pump with valve combination in turn can also be contaminated by bacterial foci, especially if no dirt filter between water connection and valve combination is installed and / or if the water is not pumped out in the surge tank for a long time. Furthermore, it proves to be a disadvantage that the individual components of the valve combination, the connections to the water supply and the surge tank in the shaft are heavily contaminated and may even be slagged if the rainwater mixes with the dirt. Therefore, it proves to be extremely important to provide a corresponding shaft drainage, which either opens directly into the sewer, or operated by a pump.

Against this background, it is the object of the invention to form a piston suction pump, which is supplied by an external fluid source, which ensures an efficient and cost-saving assembly, taking better account of hygiene regulations and economic factors.

This object is achieved by a piston suction pump, which is supplied by an external fluid source, characterized in that the required for receiving liquid device is housed in the pump base. The use of a piston suction pump incorporating the equipment required for water supply into the pump base ensures efficient and cost-effective installation, since there is no need to undertake structural measures, such as providing a shaft for housing the external fluid - or water supply components. Furthermore, the present invention proves to be extremely hygienic due to the integrated device, since the contamination of the individual components and thus contamination of the drinking water can be significantly reduced.

In a preferred embodiment of the present invention, a pressure line of the external source in the pump base is directly connected to the device. By this embodiment, additional construction measures, such as the provision of a shaft, lapsed, thus ensuring an efficient and cost-effective installation.

In a further preferred embodiment of the present invention, the pressure line of the external source opens into the pump base and is not directly connected to the riser of the piston suction pump. Consequently, an additional construction measure is not required by this embodiment, and thus an efficient and cost-effective installation possible.

In a further preferred embodiment, the device required for receiving liquid in the pump foot comprises at least one valve. This embodiment is particularly suitable when the pressure line of the external source opens into the pump base and is not directly connected to the riser of Kolbensaugpumpe. Furthermore, attaching the valve in the pump foot reduces the risk of contamination and thus also possible contamination of the water.

In a further preferred embodiment, the device required for receiving liquid in the pump foot comprises at least two valves. This embodiment is particularly suitable for the direct connection of the pressure line of the external source to the riser in the pump base. In a further preferred embodiment, the device required for receiving liquid in the pump foot comprises at least three valves. This embodiment is also particularly suitable for the direct connection of the pressure line of the external source to the riser in the pump base.

In a further preferred development of this embodiment, the device in the pump base has a diaphragm valve and a pressure reducing valve. This embodiment incorporates the aforementioned advantages that enable efficient and inexpensive assembly. Furthermore, the risk of contamination and thus also a possible contamination of the water is reduced here by attaching the valves in the pump foot.

In a further preferred development of this embodiment, the device in the pump base has a diaphragm valve, a pressure reducing valve, and a pressure relief valve. This additional valve is used to prevent any possible pressure surges.

In a further preferred embodiment, the device in the pump foot, which comprises at least one valve, attached to the end of the pressure line. This embodiment is particularly advantageous when a float valve for fluid level regulation for the pressure line, which opens into the pump foot, is used.

In a further preferred embodiment, the at least one valve is a float valve, which serves for level control. This embodiment also incorporates the advantages mentioned above, which allow efficient and cost-effective assembly, and which allow to provide a robust piston suction pump, which corresponds to economic aspects.

In a further preferred embodiment, the external source is a drinking water source and the transition from drinking water to service water is at the lower edge of the pump piston. The path length that the process water must pass through before it exits the outlet opening is thus extremely short, so that the drinking water quality is usually maintained. In a further preferred embodiment, the external source is a drinking water source and the transition from drinking water to service water is located at the pump foot. In this embodiment, the pump base serves as a water reservoir, whereby also here the distance that must cover the water to the outlet opening, extremely short fails and the water quality is usually maintained.

In further embodiments, a surge tank is provided in the pump base, which has the task of producing a uniform flow of water. Due to the occurring jerky water removal by the piston suction pump pressure surges are avoided in the water supply system.

Further advantageous embodiments of the present invention are specified in the appended claims. In the following description, embodiments will be described in detail with reference to the accompanying drawings. In the accompanying drawings show:

1a is a schematic side view of a Kolbensaugpumpe and a perspective view of the individual components of the valve combination, which are housed in a designated slot;

FIG. 1b shows a schematic side view of a piston suction pump and a perspective view of an intake container with associated components, which are accommodated in a shaft provided for this purpose; FIG.

Fig. 2a is a schematic side view of a piston suction pump and its main components;

2b is a schematic side view of a piston suction pump plus the required for receiving liquid device, and

Fig. 3 is a schematic side view of a piston suction pump plus the required for receiving liquid means. Fig. 2a shows a piston suction pump 200 and its externally visible components. In the embodiment shown, the piston suction pump 200 comprises a pump base 201, a pump column 202 and a liquid outlet opening 206, wherein preferably all components are hot-dip galvanized. The pump base 201 accommodates a riser 207 and a device 209 required for receiving liquid, the device 209 being connected to a pressure line 208. Furthermore, the piston suction pump 200 includes a hot-dip galvanized pump handle 204, for example made of gray cast iron, which is connected by pin with a wind turbine hood 205, which is also hot-dip galvanized, the wind box hood is provided with two bearings made of brass. The use of hot-dip galvanized materials has the advantage that the piston suction pump 200 can withstand any weather conditions over a long period of time. Furthermore, this embodiment of the present invention ensures easy and rapid assembly of the individual components using conventional screws and pins.

A pump piston which, like the pump piston 103 shown in FIG. 1 a, can be made of plastic and is connected to the pump handle 204 via a galvanized piston rod. By actuating the pump handle 204, the liquid in the riser is lifted by suction stroke substantially during the upward movement of the piston. This opens a nasal piercing valve, which may be formed like the nasal piercing valve 108 shown in Fig. 1a, and allows the water to enter the pump cylinder. During the downward movement of the piston, the liquid flows through an opening or a valve in the cavity above the piston, where it is scooped out of the liquid outlet opening 206 simultaneously with the next suction stroke. This is followed by the nasal piercing valve, thus preventing the water return into the riser.

In Fig. 2b, a piston suction pump is shown schematically, with the components described in Fig. 2a. Furthermore, Fig. 2b shows the riser 207, which opens into the Nasenstechventil, a diaphragm valve 210 and a pressure reducing valve 211, which together result in a valve combination 212 and connect the pressure line 208 of the external source with the riser 207. Further, FIG. 2b shows a pressure relief valve 213 mounted on the riser 207 and used to avoid the build-up of pressure surges in the conduit 208 and, at the same time, to cause the pump lever 204 to return prevent. Thus, the pressure relief valve 213 accomplishes the task of establishing a uniform flow of water. At the inflow to Veπtilkombination 212 is the pressure reducing valve 211, which serves to keep the water pressure constant uniformly stable. At the upper end of the valve combination 212, between the pressure reducing valve 211 and the riser 207 is the diaphragm valve 210. This diaphragm valve 210 is specially adapted to the piston suction pump and the pressure reducing valve.

Upon actuation of the pump rocker 204 down the pump piston 103 goes up and opens by the occurring vacuum, the diaphragm valve 210 so that liquid can be pulled out of the pressure line 208. Advantageously, by connecting the pressure line 208 with the riser 207 via the valve combination 212 connected therebetween, the quality of the drinking water is largely retained until it leaves the piston suction pump 200, whereby this construction proves to be extremely hygienic. By integrated into the pump base 201 pressure line 208 with associated valve combination 212 a simple and robust installation is ensured, which requires no further structural measures, such as the formation of a shaft, whereby this construction proves to be extremely efficient and inexpensive. Furthermore, this avoids that the individual components of the valve combination 212 pollute or slag, which would be the case by the mixing of rainwater and dust particles.

The piston suction pump 200 can also be provided with a special surge tank, which can be configured as the surge tank 115 shown in Fig. 1a, which then has the task of producing a uniform flow of water. When the piston suction pump is at a standstill, the surge tank fills with water, causing the rubber bubble filled with nitrogen in the surge tank to become strained due to the water pressure. When pumping or when removing water, a part of the sucked by the pump water quantity is sucked out of the container. During this process, the rubber bubble relaxes in the surge tank. The other part of the amount of water flows directly through the pressure reducing valve 211 from the water line. This process is repeated with each pumping operation. The special pressure equalization tank also has the task of producing a uniform flow of water. Due to the occurring jerky water withdrawals by the piston suction pump 200 pressure surges are avoided in the supply system. However, since the Path length between the pressure line 208 and outlet opening 206, compared to the conventional embodiment, has significantly reduced, the incorporation of a surge tank in the Pumpenfuß 201 proves to be not essential. Due to the possibility of attaching the pressure relief valve 213 to the riser 207 to counteract pressure surges in the line 208, the installation of a pressure equalization tank in the pump base 201 is not required in this case.

Another advantage of this embodiment results from the absolutely recoil-poor design with any lack of water. Since at very low water level the water in the riser decreases and only air is sucked in when operating the pump piston instead of water, there is a vacuum that pulls the pump piston down and thus rocket the pump handle, if this is not kept appropriate. Due to the pressure relief valve 213 and / or the short distance between riser 207 and pressure line 208, however, the difference between "lack of water" and "high water level" is low and thus a repelling of the pump swing 206 is negligible. Thus, a risk of injury, especially for children on children's playgrounds, extremely low.

FIG. 3 shows a schematically illustrated piston suction pump 300 with the components described in FIG. 2 a and the components accommodated in a pump base 301. These include a riser 307, which is bent in the central region, to accommodate the opening into the pump foot 301 pressure line 310 with the attached float valve 309 fit. In this embodiment, the pump foot 301 serves as a water reservoir whose water level is controlled by means of a float valve 309 in order to optimize the water supply and to take into account economic considerations. This embodiment is characterized in particular by a robust and efficient construction, which also proves to be cost-effective, since no additional structural measures are required here. Since the drinking water after leaving the pressure line 310 is referred to as service water and the pump foot 301 serves as a water reservoir, the transition from drinking water to service water is set from the lower edge of the pump 301 in this case. Since the distance between the provision of water and the outlet opening 306 is also extremely small here as well, the drinking water quality until it leaves the outlet opening 306 is essentially retained in this case as well.

Claims

protection claims

A manual piston suction pump comprising a pump base, a pump column, a fluid outlet port, and a pump piston communicating with a pump handle and capable of lifting fluid in the riser by suction stroke, the piston suction pump being adapted to be powered by an external fluid source in that the device required for receiving liquid is accommodated in the pump base.

The apparatus of claim 1, wherein the piston suction pump has a pressure port from the external source in the pump base.

3. Device according to claim 1, wherein a pressure line of the external source is connected in the pump foot directly to the device.

4. Apparatus according to claim 1, wherein the pressure line of the external source opens into the pump foot.

5. The apparatus of claim 1, wherein the means in the pump foot comprises at least one valve.

6. Device according to claims 2 and 4, wherein the device in the pump foot comprises at least two valves.

7. Apparatus according to claim 6, wherein the means in the pump foot comprises a diaphragm valve and a Druckreduzierveπtil.

8. Device according to claims 2 and 4, wherein the device in the pump foot comprises at least three valves.

The apparatus of claim 8, wherein the means in the pump base comprises a diaphragm valve, a pressure reducing valve, and a pressure relief valve.

10. The device according to claim 3, wherein the device in the pump foot, which comprises at least one valve, is attached to the end of the pressure line.

11. The apparatus of claim 3, wherein the at least one valve is a float valve for Fühlerstandsregelung.

12. The apparatus of claim 2, wherein the transition from drinking water to service water is located at the lower edge of the pump piston.

13. The apparatus of claim 3, wherein the transition from drinking water to service water is located at the pump foot.

14. The apparatus of claim 3, wherein the pump base serves as a water reservoir.

15. The apparatus of claim 2, wherein a surge tank is provided in the pump base.

16. The apparatus of claim 2, wherein the surge tank in the pump base is connected to the device and the pressure line to reduce pressure surges in the external source.