DE9211393U1 - Diaphragm pump - Google Patents

Description

R.B.ltu., Bchulmtr.AB, 3303 Bor nh. 1 . , d.n 23. 8. 93 Page 11 Utility model protection - registration

Diaphragm pumps are well known and are used in many different ways. The disadvantage of diaphragm pumps is their complicated structure, and ball valves or flap valves are required for proper operation. In these valves, long-fibered or solid impurities in the liquid being pumped can lead to malfunctions and failures. Due to the flat diaphragms and the air control, a small, slim design is not possible. The forces that arise when the diaphragm switches from suction to pressure surge require a stable housing and strong fixing of the entire device.

Also well known are hose pumps. They are a type of rotating displacement pump. The hose is compressed by rollers or sliding shoes on a rotor during the pumping process. This places high loads on the hose at certain points. Since the friction of the rollers or shoes tries to take the hose with it, a strong connection between the hose and the flange or other suction and pressure side connection must be ensured. Larger pumps usually have a lubricant to reduce the friction between the sliding shoe or roller and the hose. When the pump is stopped, one part of the hose is always pressed in. If the pump is stopped for a long time, this can lead to permanent deformation of the hose. When the pump is stopped, free flow is not possible. The permissible grain size is possibly 0.5 x hose wall thickness.
Due to the design, large housings are necessary.

R.Blltui, Schul«tr.4S, 3303 Bornhali,don 23. p. 92 page

Furthermore, from P 42 22 810.7, from B 92 04 631.2, from 6 91 08 536.5 and the application diaphragm pumps

known. However, these have the disadvantage that the delivery takes place intermittently. These pulsations are undesirable, but a constant flow is desired. Furthermore, it is not possible to monitor the pump and valve hoses. The pressures and the filling of the

Pressure chambers cannot be measured and therefore real control of the pumping process is not possible. Therefore, the pumping of sensitive substances is not optimally designed. Another disadvantage is that when the pump hose is compressed and the inlet or outlet valve is closed, the medium to be pumped is strongly compressed in the spaces between the valves. The hose (1) is therefore subjected to unnecessary stress.

Another disadvantage is that if the medium to be pumped changes, the entire pump must be replaced. This is also the case if substances contaminated with dangerous substances are to be pumped. Monitoring the hoses in contact with the medium to be pumped is difficult to carry out, and connection to double-walled pipe systems is not possible.

The invention is based on the object of designing a pump in such a way that the aforementioned disadvantages do not occur, that the product hose (34) in contact with the product to be pumped is easy to replace and dispose of, that a gentle pressure transmission is possible by means of a transmission medium,

that the product hose (34) can be monitored for leaks, that the pump is to be connected to a double- or multi-walled pipe system,

the medium to be pumped can be tempered, the pump can be pushed over an existing hose

that no or only slight pulsations occur,

R.9»ltu«, 9chulmtr.49, 3303 Bornh»l»,d»n 23.8.92 Page 13

that the delivery rate is adjustable, that the speed at which the hose (1) is compressed is adjustable,

that the condition of the hose (1) can be monitored, that the medium to be conveyed is conveyed as if through a smooth pipe,

that the medium to be conveyed only comes into contact with the product hose (34),

that no seals are necessary,

that there is a completely smooth and free passage and thus no pressure losses occur, that when not in use the pump acts like a smooth pipe, that the pump can be used as a three- or multiple pinch valve,

that liquids or gases can be introduced into the medium to be conveyed through a microporous hose or fabric,

that liquids or gases can be extracted from the medium to be pumped in the same way,

that the housing of the pump and the valves can consist of half shells, which are subsequently attached, that a slim design is possible, that long-fibered or solid admixtures in the material to be conveyed do not cause any disruption.

According to the invention , the object is achieved in that three or more separate pressure chambers are arranged around a hose (1) and are subjected to pressure and/or negative pressure in alternating sequence in such a way that the medium to be conveyed is forcibly pressed from the inlet end to the outlet end by one or more product hoses (34) arranged coaxially in the hose (1).

Additional pressure chambers that are not or only slightly pressurized act as pulsation dampers.

R.Baltu«, 9chul.tr . 4&bgr;, 3303 Bor nhil ■, d«n 23.S.92 Page 14

Furthermore, pulsation dampers are of the same design and have the same advantages as the valves and the pressure part of the pump, are combined with them and are installed in such a way that the pulsations are dampened in a controlled or uncontrolled manner.

A particular advantage is that the material to be pumped is separated from the pressure medium of the pulsation damper by a membrane-like hose (1) and product hose (34) and that the pump can be easily cleaned and sterilized when not in use.

Furthermore, means for measuring pressure and flow in the lines of the pressure medium and the conveying medium are installed to monitor the hose (1) and the product hose. These also serve to form input variables in a suitable control electronics.

In example I, the pump consists of the hose (1) and the two valve bodies (2 and 20), the pump body (7) and the pulsation damper body (30). These concentrically surround the hose (1) and leave space for the pressure chambers (3, 13, 8 and 28). The product hose (34) is guided inside the hose (1). They are screwed together with connecting bolts (6 and 10), for example, and the pressure chambers can be supplied with a fluid or gaseous actuating medium, e.g. compressed air, pressurized water or similar, via the connections (5, 9 and 12). For the pulsation damper, the connection (29) can be closed or connected to an external pressure accumulator or to another pulsation damper.

The sequence of the pressure pulses determines the pump's delivery direction. If, for example, a product is to be transported in the delivery direction (16), the operation is as follows: All three pressure chambers, if necessary also the pressure chamber (28) of the pulsation damper, are filled, the hose (1) is compressed, the valve chambers (15 and 19) and the

R.Baltu«, Schulstr. 4&bgr;, 3303 Bornh»la,d»n 23. &bgr;. 92 Page 15

The pump chamber (17) and the pulsation damper chamber (27) are closed. If the pressure chambers (8 and 13) are relaxed, the valve chamber (19) and the pump chamber (17) open, the negative pressure that develops in the product hose (34) sucks in the product to be pumped. If the valve chamber (19) is now closed, the valve chamber (15) is opened and the pump chamber (17) is closed, the product in the product hose (34) is pumped in the direction (16). Backflow is prevented by the closed valve chamber (19).

Immediately afterwards, the valve chamber (15) is closed, the valve chamber (19) and the pump chamber (17) are opened, and a quantity of product is sucked in again.

If the sequence is reversed, the fluid is conveyed in the direction (18). The pulsation damper is also effective in this direction. The medium to be conveyed is pressed into the product hose (34) located in the pulsation damper chamber (27). The product hose (34) transfers the pressure via the hose (1), which transfers the pressure to the pressure chamber of the pulsation damper (28). If the valve (19) now opens, the conveyed medium can continue to flow.

The connections (5, 9 and 12) are used to supply the respective printing medium used.

The valve and pump bodies are screwed together in a pressure-tight manner using the connecting bolts (6 and 10) arranged all around in the required number. The sealing rings (21) fitted during manufacture or subsequently serve as seals. The holes (4 and 14) made all around are used to flange the connecting lines.

In the embodiment II, the hose (1) is individually assigned to the valve bodies (2 and 20) and the pump body (7) as well as the pulsation damper body (30). The advantage is that commercially available diaphragm valves can be used.

The product hose (34) is guided inside the hose (1).

R.Baltus, 9chul«tr.4B, 3303 Bornhcl a, 23.S.92 page 1&ohacgr;

In the embodiment example III, the sealing rings (21) are missing. Here, the hose (1) is glued, vulcanized or similarly attached to the housing (2, 7 and 20) at the separation points (22). Another method of fixing the hose is by means of spring rings (24) which are inserted during the manufacturing process of the hose (1) or subsequently. If the rings (24) are inserted during the manufacture of the hose (1), they are separated from the medium to be conveyed and the hose (1) has no places where deposits can form.

The rings (24) press the hose (1) into the recesses (23) provided for it and seal the pressure chambers against each other and against the environment.

The proximity switches (26) are used to monitor the pump hose (1).

The product hose (34) is guided inside the hose (1).

In design example IV, a complete diaphragm pump with pulsation damper is shown schematically. The product hose (34) is guided inside the hose (1).

R.B.ltu«, 9cnul.tr.«&thgr;, 3303 Bor nh«1 ■ , a.n 23.B.92 Page Reference list

1. Hose

2. Valve body

3. Pressure chamber

4. Hole for flanging

5. Connection pressure medium valve body

6. Connecting bolt

7. Pressure chamber

8. Pump body

9. Connection pressure medium pump body

10. Connecting bolt

11. Nozzle

12. Connection pressure medium valve body

13. Pressure chamber

14. Hole for flanging

15. Valve chamber

16. Conveying direction

17. Pump room

18. Conveying direction

19. Valve chamber

20. Valve body

21. Separating rings

22. Bonding/vulcanization point

23. Separation point

24. Spring Ring

25. In/outlet ends 2£>. Proximity switch

27 Pulsation damper chamber

28 Pulsation damper—pressure chamber

29 Connection of external pressure accumulator or connection line to other pulsation dampers

30 Pulsation Damper—Body

31 External pressure accumulator

32 Closure

33 Throttle check valve

34 coaxial, elastic product hose

Claims (52)

R.Baltua, Bchulatr.48, 33O3 Bor nh« 1 · , d«n 23. B. 92 Page 1 Diaphragm pump utility model protection claims 1. Diaphragm pump with a pump chamber (17) that can be elastically deformed by an actuating means, having suction and pressure valves (15 and 19) and pulsation dampers (27), as well as one or more elastic product or pressure transfer hoses that are guided coaxially into a hose (1), characterized by a flexible hose (1) with diaphragm valves (15 and 19) located at each end and between them... and downstream pulsation dampers (27) and a body of the conveying part (7), the valves (2 and 20) and the pulsation dampers (27) made of metal or plastic, which surrounds the hose (1) essentially concentrically and is filled with a fluid, gaseous, mechanical or a combination of fluid, gaseous and mechanical actuating means to be connected to an exciter, and one or more elastic hoses inserted in the hose (1) for product conveyance (34) or for the transmission of pressures. 2. Diaphragm pump according to claim 1, characterized in that the pump(s), valve, and pulsation damper chambers (27) and the product hose (34) have no constrictions in the resting state. 3. Diaphragm pump according to claim 1 or 2, characterized in that the valve spaces (15 and 19) and the spaces of the pulsation damper chambers (27) have no constrictions by flaps, balls, cones or the like and no valve seats. 4. Diaphragm pump according to one or more of claims 1 to 3, characterized in that the hose (1) is made of one piece and simultaneously concentrically encloses the pump chamber (17) and the valve chambers (15 and 19) and the pulsation damping chambers (27) as well as the product hose (34). R.Baltu·, Schul.tr.«&bgr;, 3303 Bornh.l m , d»n 23.9.92 Page 2 5. Diaphragm pump according to one or more of claims 1 to 4, characterized in that the middle (8) and the two outer pressure chambers (3 and 13) as well as the pulsation damper pressure chamber (28) are separated by separating rings (21) attached directly during manufacture or subsequently. 6. Diaphragm pump according to one or more of claims 1 to 5, characterized in that a controlled, adjustable exciter, which optionally acts on the actuating means with pulsating pressure and/or negative pressure, is detachably connected to the liquid, gaseous or a combination of both actuating means contained in the pressure chambers. 7. Diaphragm pump according to one or more of claims 1 to 6 characterized in that, in order to close the valve chambers (15 and 19), the pressure chambers (3 and 13) concentrically enclosing the hose (1) are pressurized and transfer the pressure to the product hose (34). 8. Diaphragm pump according to one or more of claims 1 to 7, characterized in that for the further conveying of the material to be pumped, the pressure chamber (8) concentrically surrounding the hose (1) is pressurized, the hose (1) is compressed, the pressure is transferred to the product hose (34) and the medium to be conveyed is displaced to the side. 9. Diaphragm pump according to one or more of claims 1 to 8, characterized in that the suction effect of the pump is created by the restoring force of the material from which the hose (1) and the product hose (34) are made. R.Baltu·, Bchul.tr.«8, 3303 Barnhala,dan 23.B.92 Page ~*· 10. Diaphragm pump according to one or more of claims 1 to 9
characterized in that when using non-recoverable materials for the hose (1) and the product hose (34) the suction effect through
Applying negative pressure to the pressure chamber (8) achieves
becomes. 11. Diaphragm pump according to one or more of claims 1 to 10, characterized in that the sequence in which the pressure chambers (3, 8 and 13) are
Pressure/vacuum are applied, which determine the delivery direction of the pump. 12. Diaphragm pump according to one or more of claims 1 to 11, characterized in that the valve—
body (2 and 20) and the pump body (7) as well as the Pulsation damping body (30) each consisting of two
welded, glued or screwed half shells
can exist. 13. Diaphragm pump according to one or more of claims 1 to 12, characterized in that the half shells are subsequently wrapped around the hose (1) with the separating rings (21) can be attached. 14. Diaphragm pump according to one or more of claims 1 to 13, characterized in that the hose (1) with the separating rings (21) is made of one piece, in a
Injection molded, cast or otherwise manufactured
can be. 15. Diaphragm pump according to one or more of claims 1 to 14, characterized in that the separating—
rings (21) can be subsequently attached around the hose (1). R.Baltu«, Schul«tr.4B, 5303 Bornh· I ·, d.n 23.8.92 Page 4 16. Diaphragm pump according to one or more of claims 1 to 15, characterized in that the hose (1) and the product hose (34) are made of a material adapted to the medium to be conveyed, e.g. rubber, plastic, silicone, but can also be made of fabric. 17. Diaphragm pump according to one or more of claims 1 to 16, characterized in that the hose (1) and the product hose (34) can be made of microporous material. 18. Diaphragm pump according to one or more of claims 1 to 17 characterized in that gases, liquids or mixtures thereof can be introduced into the material to be conveyed through the microporous or fabric-like material of the hose (1) and the product hose (34). 19. Diaphragm pump according to one or more of claims 1 to 18 characterized in that gases, liquids or mixtures thereof from the material to be conveyed can be introduced into the liquid or gaseous actuating means through the microporous or fabric-like material of the hose (1) and the product hose (34). 20. Diaphragm pump according to one or more of claims 1 to 19, characterized in that the hose (1) can be fixed at the inlet/outlet ends (25) and at the separation points (23) between the pump chamber (17) and the valve chambers (15 and 19) to the valve bodies (2 and 20) and the pump body (7) as well as the pulsation damping chambers (27), e.g. by means of adhesive, vulcanization or a spring ring (24). 21. Diaphragm pump according to one or more of claims 1 to 20, characterized in that the liquid flowing back in a spurt-like manner from the product hose (34) when the valve chamber (19) at the inlet end (25) is closed is used to flush a filter possibly connected upstream. R.B«ltu·, Schul«tr.4B, 3303 Bornh·1«,d«n 23.&bgr;.92 Sol to 5 22. Diaphragm pump according to one or more of claims 1 to 21, characterized in that any number of pump chambers (17) and pulsation damper chambers (27) can be arranged one behind the other. 23. Diaphragm pump according to one or more of claims 1 to 22, characterized in that between the valve chambers (15 and 19) and the pump chamber and the pulsation damper chambers (27) there can be pipe sections of any length, but also bends or other fittings. 24. Diaphragm pump according to one or more of claims 1 to 23, characterized in that two or more product hoses (34), optionally with different diameters, can be mounted next to one another with common pressure chambers (3, 8, 13 and 28) assigned to the valve, pump and pulsation damper chambers, and with common valve or pump and pulsation damper chambers (2, 7, 20 and 27) assigned to the valve, pump and pulsation damper chambers (27). 25. Diaphragm pump according to one or more of claims 1 to 24, characterized in that four or more hose valves can be combined to form a pump with a pulsation damper. 2.6. Diaphragm pump according to one or more of claims 1 to 25, characterized in that the gas in the pulsation damper pressure chambers (28) is compressible, if necessary under pre-pressure, and that the pulsations of the material to be conveyed can be dampened as a result. 27. Diaphragm pump according to one or more of claims 1 to 26 characterized in that the pulsation damping pressure chambers (28) are equipped with an adjustable or controllable throttle check valve (33). R.Baltu·, Schulatr.49, 3303 Boi-nh.l », d.n 23.0.92 c* -j 4-c, A 28. Diaphragm pump according to one or more of claims 1 to 27, characterized in that the Pulsation damping pressure chambers (28) are connected to external pressure equalization vessels (31). 29. Diaphragm pump according to one or more of claims 1 to 28, characterized in that the
-conveying material only with the product hose (34) and not with the external fittings such as T-pieces and pipes or
comes into contact with the hose (1). 30. Diaphragm pump according to one or more of claims 1 to 29, characterized in that the Pulsation damper pressure chambers (28) with one another with a
Pipeline and thus alternately as
serve as pressure accumulators. 31. Diaphragm pump according to one or more of claims 1 to 30, characterized in that the Pulsation dampers—pressure chambers (28) or the connecting—
lines to the pressure accumulators using suitable
Devices can be vented. 31. Diaphragm pump according to one or more of claims 1 to 30, characterized in that pulsation—
damper chambers (27) in combination with the product hose (34) can be used as storage for the material to be extracted. 32. Diaphragm pump according to one or more of claims 1 to 31, characterized in that by a
behind the last pulsation damper chamber (27) on the
Product hose (34) arranged, cross-sectionally fixed, control or adjustable valve or nozzle (11)
a steady flow of the pumped material can be conveyed. R.8«ltu«, Bchul«tr.48, 3303 Bornhal■,d»n 23.9.92 Page 7 33. Diaphragm pump according to one or more of claims 1 to 32, characterized in that in the pressure lines to the valve and pulsation dampers—pressure chambers (28) means for measuring the pressure built up in the chambers and acting on the hose (1) are installed. 34. Diaphragm pump according to one or more of claims 1 to 33, characterized in that the information about the measured pressure can be evaluated in a suitable electronic circuit and can be used to optimally control the pumping process. 35. Diaphragm pump according to one or more of claims 1 to 30, characterized in that in the pressure lines to the valve and pulsation damper pressure chambers (28) means for measuring the amount of pressure medium flowing into the chambers are arranged. 36. Diaphragm pump according to one or more of claims 1 to 35 characterized in that the information about the measured amount of the inflowing pressure medium, if necessary in combination with the measured pressure, can be evaluated in a suitable electronic circuit and can be used to optimally control the pumping process. 37. Diaphragm pump according to one or more of claims 1 to 36, characterized in that the pressure and quantity measurement of the actuating means can be used to monitor the proper function or the perfect condition of the hose (1). 38. Diaphragm pump according to one or more of claims 1 to 37, characterized in that the pressure chambers of the pump part and the valves as well as the pulsation damper are assigned means for measuring distances, e.g. one or more analog or digital proximity switches. R.Baltu«, Schul»tr.«&bgr;, 3303 iornhlU,din 23.9.92 Page S 39. Diaphragm pump according to one or more of claims 1 to 38, characterized in that the deformation of the hose (1) can be measured, e.g. by means of proximity sensors, the hose (1) can be monitored for the correct deformation and the pump can be controlled or regulated. 40. Diaphragm pump according to one or more of claims 1 to 39, characterized in that a pressure sensor is arranged at the outlet end of the pump. 41. Diaphragm pump according to one or more of claims 1 to 40, characterized in that the signals of the pressure sensor arranged at the pump outlet are evaluated in a suitable electronic circuit and can be used as an input variable for optimizing the pressurization of the valve and pump chambers. 42. Diaphragm pump according to one or more of claims 1 to 41, characterized in that the space between the hose (1) and the product hose (34) is filled with a pressure transfer medium of gaseous, liquid or pasty consistency and which has conductive properties. 43. Diaphragm pump according to one or more of claims 1 to 42, characterized in that the pressure medium can be pumped in a suitable manner, e.g. T-pieces, and a pressure-maintaining valve into a temperature-controlled storage container and can be sucked back into the space between the hose (1) and the product hose (34). 44. Diaphragm pump according to one or more of claims 1 to 43, characterized in that the pressure acting on the product hose (34) and thus on the product can be regulated via an adjustable or controllable pressure-maintaining valve. R.BaItUI, Schul«tr.A8, 3303 Bornhai ·, &agr;.&eegr; 23. p. 92 page 9 45. Diaphragm pump according to one or more of claims 1 to 44 characterized in that the conductive pressure transmission means can be monitored with suitable sensors. 46. Diaphragm pump according to one or more of claims 1 to 45, characterized in that the change in conductivity for monitoring a product hose (34) occurring leaks, 47. Diaphragm pump according to one or more of claims 1 to 46, characterized in that the product to be conveyed can be tempered via the pressure transmission means. 48. Diaphragm pump according to one or more of claims 1 to 47 characterized in that the hose (1) and the product hose (34) can be connected to a double-walled safety hose system for conveying toxic substances contaminated with bacteria, radioactive substances or other dangerous substances. 49. Diaphragm pump according to one or more of claims 1 to 48 characterized in that the product hose (34) is loosely inserted in the hose (1) and protrudes to any length and beyond the pump inlet and outlet for any length. 50. Diaphragm pump according to one or more of claims 1 to 49, characterized in that the product hose (34) is partially or completely glued to the hose (1). R.Biltu», Schul.tr.48, 3303 Bornhtl m , dan 23.9.92 Page 10 51. Diaphragm pump according to one or more of claims 1 to characterized in that the pump is arranged over an existing product hose (34). 52. Diaphragm pump according to one or more of claims 1 to 4, characterized in that the pump can be displaced via an existing product hose (34).