JP2019525106A - High density material valve - Google Patents

Abstract

The present invention relates to a high density material valve having a first through opening (27), a second through opening (28), and a valve member (32) associated with both through openings (27, 28). The valve member is mounted pivotably about a pivot axis (36), and the valve member has a curved sealing surface (38) about the pivot axis. In the first state (30), the valve member opens the first through opening and closes the second through opening. In the second state (29), the valve member opens the second through opening and closes the first through opening. The valve member comprises a sealing part (35) and a pivot part (34), the pivot part being rotatably mounted in a pivot axis, the sealing part being connected to the pivot part via a connection structure (37). Yes. The high density material valve according to the present invention is of simple construction and can be used to create a continuous flow of material in the direction of the outlet (23) of the high density material pump. [Selection] Figure 5

Description

  The present invention relates to a high-density material valve having a first through-opening, a second through-opening, and a valve member that interacts with both through-openings.

  Such valves are used for conveying high density materials such as ready-mixed concrete or mortar. In this case, there are a first transport state in which the high-density material passes through the first through-opening and a second transport state in which the high-density material passes through the second through-opening. The high density material valve serves to open a through opening for a high density material suitable for a particular transport condition.

  High density material valves in which the valve member is associated with two through-openings are described, for example, in DE 10 2013 215 990, U.S. Pat. No. 8,827,657, DE 19503986, It is known from German Offenlegungsschrift 10 2005008938. The valve member has an S-shaped pipe segment shape, and one end thereof can optionally be connected to the first through opening or the second through opening. This is mechanically complex.

  The problem to be solved by the present invention is to propose a high density material valve with a simpler structure. Starting from the above prior art, this problem is solved by the features of claim 1. Preferred embodiments are given in the dependent claims.

  In the high-density material valve according to the invention, the valve member associated with both through-openings is pivotally mounted with respect to a pivot axis and has a curved sealing surface about this pivot axis. In the first state, the valve member opens the first through opening and closes the second through opening. In the second state, the valve member opens the second through opening and closes the first through opening. In one variation of the invention, the valve member comprises a sealing portion and a pivot portion. The pivot part is rotatably mounted on the pivot axis. The sealing part is connected to the pivot part via a connection structure.

  Thanks to the design according to the invention, there is a simple spatial correlation between the through-opening and the pivot axis of the valve member, which allows a simple design configuration of the high-density material valve. When the sealing portion is connected to the pivot portion via the connection structure, a reliable sealing effect can be obtained between the sealing portion and the through opening.

  High density material is a generic term for media that are difficult to transport. Examples of the high-density material include a substance containing a coarse particulate component and a substance containing an active ingredient. The high density material may be a bulk material. In one embodiment, the high density material is ready-mixed concrete. Ready-mixed concrete contains particles with a size of up to 30 mm, and is difficult to transport because it binds in an invisible place to form a deposit.

  The valve member may be disposed in the internal space of the high density material valve. The high-density material valve according to the present invention may be configured such that the high-density material enters the internal space of the high-density material valve through the through opening. The high density material valve may further have an outlet opening through which the high density material once placed also exits the valve. A pipe may be connected to the outlet opening, through which the dense material is further conveyed. The passage between the through opening and the outlet opening may be adjusted so as not to pass through the valve member.

  The first through-opening and the second through-opening may each have a sealing surface designed to interact with the sealing surface of the valve member. The sealing surface can be, for example, the inner surface of a circular, high-density material valve housing that extends around the through-opening. The sealing surface of the through opening may have a (concentric) curved portion centered on the pivot axis of the valve member. Thanks to the concentric bends of the interacting sealing surfaces, the valve member can be rotated about a pivot axis corresponding to the bend axis. In this way, one of the openings can obtain a free flow therethrough, while the sealing surface of the valve member seals with the sealing surface of the other through-opening in a manner that seals. Works. Sealing should be understood for application areas where 100 percent airtightness is not required.

  In one embodiment, the concentric curvature corresponds to a portion of the cylinder skin when the cylinder axis is the same as the pivot axis. In this embodiment, the radial spacing between the sealing surface of the valve member and the pivot axis is uniform over the length of the pivot axis. Also included are embodiments in which this radial spacing varies along the pivot axis. In either case, the curved portion may correspond to a circular segment in the circumferential direction.

  An intermediate surface may be disposed between the first through-opening and the second through-opening, and the intermediate surface similarly has a curved portion centered on the pivot axis. In this way, it is possible to create a continuous contour centered on the pivot axis, the contour extending from the first through opening through the intermediate surface to the second through opening.

  In addition to the switching state in which the valve member closes the first or second through opening, the high-density material valve has a third switching state (intermediate state) in which both the first through opening and the second through opening are open. You may have. In the intermediate state, the valve member may be located between the first through opening and the second through opening. The distance between the two through openings may be so large that both through openings are fully opened. This has the advantage that the edge of the sealing surface is not exposed to the flow of material extending through the opening. It is also possible for one or both through openings to continue to be partially covered by the valve member.

  The valve member may include a sealing portion and a pivot portion, the pivot portion being rotatably mounted on the pivot axis. In order to perform the switching process between different states of the high-density material valve, the electric drive device may be engaged with the pivot portion.

  The valve member may include a connection structure that provides a connection between the sealing portion and the pivot portion. The connection structure may be designed to be rigid to such torque with respect to the pivot axis. Here, having rigidity means that when the pivot portion is bent with respect to the pivot axis, the sealing portion also performs the corresponding pivot motion.

  In the radial direction, the connection structure may allow the sealing part to move relative to the pivot part. By such relative movement, the radial spacing between the sealing surface and the pivot axis may be adapted so that the desired sealing effect occurs between the valve member and the through-opening.

  The connection structure may include an elastic member positioned between the sealing portion and the pivot portion. In the starting state of the high-density material valve, the elastic member may be compressed. When wear occurs between the sealing surfaces during operation, the elastic member is stretched. Thus, wear is automatically compensated.

  In addition or alternatively, the valve member according to the invention may be provided with a drive device in order to move the sealing part radially with respect to the pivot part. The position of the sealing part may be adapted to the pivot part during operation using the drive device. It is also possible to adjust the spring tension of the elastic member using the drive device. For example, the drive device may be a hydraulic drive device or a mechanical drive device.

  In one variation, the valve member comprises a rigid connection between the sealing surface and a pivotally attached shaft or a plurality of pivotally attached stub shafts. Thereby, when the shaft or stub shaft is elastically attached to the valve housing, radial mobility of the sealing surface relative to the valve housing is provided. For example, one or more elastic members may be provided that extend around the shaft or stub shaft. This embodiment has an advantage that the elastic member is not affected by the flow of the high-density material.

  The valve member may be disposed in the housing of the high-density material valve according to the present invention. The valve member may be disposed near the end wall of the housing with the mandrel end perpendicular to the pivot axis. Thus, the pivoting movement of the valve member is parallel to the end wall. The valve member may be separated from the end wall so that even a coarse particulate component of the high density material creates a space between the valve member and the end wall. Thereby, a valve member becomes easy to operate.

  In another embodiment, the spacing between the valve member and the end wall is less than the coarse particulate component of the dense material. The valve member may include a spatula that pushes the dense material to the side along the end wall when the valve member is operating, thereby eliminating particles that are clamped between the valve member and the end wall. The spatula may lean against the end wall or may be slightly spaced from the end wall.

  The housing may have a second end wall whereby the valve member is located between the first end wall and the second end wall. Accordingly, the interaction between the valve member and the second end wall can be configured.

  The shaft of the valve member can be attached to the housing of the high density material valve. Here, two bearings can be arranged so as to surround the valve member between the bearings. A shaft that is a component of the pivot portion of the valve member can extend between the bearings.

  The high density material valve according to the invention may be designed such that the straight connection between the inlet opening and the outlet opening of the high density material valve intersects the pivot axis. If the valve member shaft extends continuously along the pivot axis, the flow of material must be transported along the curved path beyond the shaft.

  In order to keep the flow resistance low, the valve member may be provided with a guide surface that guides the flow of material beyond the shaft. The guide surface may be adjacent to the sealing surface (as viewed from the direction in which the valve member moves) and may define a substantially linear path ahead of the valve member and the pivot axis. The guide surface may be a flat guide surface, in particular one that can be oriented parallel to the pivot axis. The guide surface may be provided with a recess at the end adjacent to the outlet opening so that the material flow can easily enter the outlet opening. The valve member may be provided with two such guide surfaces, and a sealing surface is enclosed between the guide surfaces. Depending on the switching state of the valve, the material flow can be guided along one and / or the other guide surface.

  Such a guide surface is particularly advantageous when the valve member is designed such that the pivot axis is surrounded by the body of the valve member. The elastic member of the valve member may extend around the shaft of the valve member or may be disposed between the pivot axis and the sealing surface.

  In order to keep the flow resistance low, the shaft may comprise two stub shafts, which are drawn into the bearings of the valve housing. The connection between the two stub shafts is provided by a connection structure, and the distance between the connection structure and the sealing surface is smaller than the distance between the pivot axis and the sealing surface. The connecting structure does not extend along the pivot axis, but rather is located near the sealing surface, leaving an open space for the flow of material on the path towards the outlet opening. In particular, the connection structure may be configured so that a straight line extending from an intermediate point of the through opening that is not closed to an intermediate point of the discharge opening does not intersect the valve member.

  For the connection between the shaft and the sealing portion, the connection structure may have a support column extending to the sealing portion. In particular, the struts may be oriented in the radial direction. About a sealing part, the support | pillar may be located in the center. If the struts are spaced from the end wall of the valve housing, the high density material can flow properly around the struts.

  The connection structure can also have two struts extending in the direction of the seal. The struts may be parallel to each other and oriented radially. These struts may be arranged so that a region between the pivot axis and the center of the seal is maintained open, allowing high density material to flow there. With respect to the distance between the pivot axis and the sealing surface of the valve member, the area maintained open may extend over at least 10%, preferably at least 30%, more preferably at least 50%.

  The two struts may be spaced from the end wall of the housing. The struts may also be configured as spatulas, so that the high-density material is pushed along the end face when the valve member is operating.

  When the high-density material valve according to the invention is used so that the flow of material enters the interior space of the valve through one through opening, passes through the valve member, and exits the valve through the outlet opening (pump mode) ), There is usually a pressure difference between the internal space of the high-density material valve and the external space adjacent to the through opening closed by the valve member. High density material valves may be designed such that the pressure differential exerts a force on the valve member, which enhances the sealing effect.

  When the pressure in the internal space is higher than the pressure in the external space, the valve member is pressed in the radial direction against the sealing surface of the through opening. The term radius refers to the pivot axis of the valve member. For this reason, the valve member may have an outer surface that converts the pressure in the inner space into a force applied in the radial direction. The outer surface refers to the area of the high density material valve that is in contact with the high density material in the internal space of the valve member.

  In particular, the valve member may have an outer surface located on the opposite side of the sealing surface. The outer surface may be oriented perpendicular to the radial direction. Then, the pressure applied to the outer surface is oriented to directly enhance the sealing effect.

  The valve member can also have an outer surface that is inclined with respect to the radial direction, so that only part of the pressure is applied in the direction of the sealing surface.

  The valve member may have two oppositely inclined outer surfaces. Opposite means that the outer surface is oriented so that the components of pressure applied in the radial direction are stacked.

  When the high-density material valve according to the present invention is used so that the material flow moves in the opposite direction (suction mode), it is usually impossible to enhance the sealing effect of the valve member using the pressure difference. Then, the sealing effect comes mainly from the force exerted from the pivot portion to the sealing portion. As described, this force is generated by an elastic bias or actuated drive.

  The invention further relates to a pump equipped with such a high density material valve. The high density material valve may be arranged such that the material being moved by the pump conveying member during pump operation enters the interior space of the high density material valve through the first opening and / or the second opening. .

  The pump may include a first transfer cylinder and a second transfer cylinder. Each transfer cylinder may be provided with a piston. The piston draws high-density material into the internal space of the transfer cylinder while moving backward during pump operation, and passes through the opening of the high-density material valve while moving forward. Carry high density material in the direction of.

  The transport flows of the two transport cylinders may be separated upstream of the high density material valve and collected in a common transport stream and coupled to the high density material valve. The transport flow from the first transport cylinder may enter the internal space of the high density material valve through the first through opening of the high density material valve. The transport flow from the second transport cylinder may enter the internal space of the high density material valve through the second through opening of the high density material valve.

  The piston is actuated so that backward movement occurs at shorter intervals than forward movement. The start of the forward movement of one piston may overlap the end of the forward movement of the other piston. This creates a time interval in which both pistons carry material in the direction of the high density material valve in parallel.

  The switching position of the high-density material valve may be matched to the movement of the piston in the transfer cylinder. When the piston of the first transfer cylinder is moving forward, and the piston of the second transfer cylinder is moving backward, the first through-opening is opened and the first through-opening is closed. Can be switched to a state. When the piston of the second transfer cylinder is moving forward and the piston of the first transfer cylinder is moving backward, the high-density material valve is opened with the second through opening opened and the first through opening closed. Can be switched to a state. In the intermediate stage when the pistons of both transfer cylinders are moving forward, the high-density material valve can be switched to a state in which neither through opening is closed. In the intermediate state of the high density material valve, it is preferred that both through openings are open.

  If the piston of the first transfer cylinder is moving backward and the piston of the second transfer cylinder is moving forward, there is a pressure difference between the upstream and downstream of the first through opening of the high-density material valve. The pressure in the interior space of the high density material valve substantially corresponds to the pressure exerted on the material by the piston of the second transfer cylinder by the forward movement. Although the suction pressure of the first transfer cylinder is generated upstream of the first through opening, it is considerably low. As described above, this pressure difference can be used to enhance the sealing effect between the valve member and the first through opening. Conversely, if the piston of the second transfer cylinder is moving backward and the piston of the first transfer cylinder is moving forward, a similar pressure difference is generated between the upstream and downstream of the first through opening of the high-density material valve. is there.

  The pressure difference between the upstream and downstream of the valve member hinders the switching process of the high-density material valve. Therefore, the high-density material valve may be designed so that the switching process occurs when the pressure difference reduced with respect to this pressure difference is between the upstream and downstream of the valve member. For this reason, it is preferable that the switching process occurs only when the backward movement of the piston whose through opening is closed by the valve member is completed. It may be more preferable for the switching process to occur only when each piston has started to move forward and pressure has already accumulated once more before each through opening.

  The high-density material valve may be designed so that the switching process ends before the other piston starts to move backward. In particular, the high density material valve may be designed so that the switching process is completed before the forward movement of the other piston is completed. From the first switching state in which one through-opening is closed and the other through-opening is opened, through the intermediate state in which neither through-opening is closed, either through-opening is closed or opened first. The switching process may be designed so that the valve member is shifted to two states. In particular, the pump may be designed so that the switching process of the valve member can be started only when the pressure difference between the upstream and downstream of the valve member is small.

  The above relates to the pump mode of the pump. In the suction mode, the pump may be operated in the reverse direction. The suction mode may, for example, serve to clean the high density material valve and the associated transfer line or to remove obstacles in this area. The interaction between the transport cylinder and the high-density material valve is adjusted to each other in the reverse procedure.

  In the suction mode, the pressure difference between the upstream and downstream of the valve member usually tends to decrease the sealing pressure of the valve member. Therefore, the force applied in the direction of the through-opening is exerted on the sealing portion via the pivot portion, and the valve member should be designed so as to have a sufficient sealing effect even in such a negative pressure difference.

  The invention will now be described by way of example with reference to the accompanying drawings, in accordance with a preferred embodiment.

A vehicle with a high-density material pump provided with the high-density material valve according to the present invention. 1 is a block diagram (with hydraulic symbols) of a high density material pump with a high density material valve according to the invention. The perspective view of the high-density material pump provided with the high-density material valve | bulb concerning this invention. Sectional drawing of the pump of FIG. Schematic showing the state of the high-density material pump of FIG. 3 (FIG. 5A shows the state of a valve member, FIG. 5B shows the state of a valve). Schematic showing another state of the high-density material pump of FIG. 3 (FIG. 6A shows the state of the valve member, and FIG. 6B shows the state of the valve). Schematic showing still another state of the high-density material pump of FIG. 3 (FIG. 7A shows the state of the valve member, FIG. 7B shows the state of the valve). FIG. 8A is a schematic diagram showing still another state of the high-density material pump of FIG. 3 (FIG. 8A shows a state of a valve member, and FIG. 8B shows a state of a valve). Schematic of the valve member concerning this invention. The figure showing the pressure concerning the sealing part of a valve member. A valve member of a high-density material valve according to the present invention, a part of which is shown in a sectional view. The valve member in another embodiment of the present invention. The valve member in another embodiment of this invention. FIG. 14 is a cross-sectional view of the embodiment of FIG.

  A concrete pump-like high-density material pump 15 is disposed on the loading surface of the truck 14 shown in FIG. The high density material pump 15 includes a prefill tank 16 filled with concrete from a storage tank (not shown). The high-density material pump 15 sucks the concrete from the prefill tank and conveys the concrete through the connection pipe 17 extending along the delivery boom 18. The delivery boom 18 is mounted on a pivot ring 19 and can be spread out by several seams to place the end of the pipe 17 at a distance from the track 14. At this location, concrete is removed from the connecting pipe 17.

  The high-density material pump according to FIG. 2 includes a first transfer cylinder 21 and a second transfer cylinder 22. Each of the transfer cylinders 21 and 22 includes a piston. The piston sucks the concrete from the prefill tank 16 while moving backward, and transfers the concrete toward the outlet 23 of the pump while moving forward.

  The first transport cylinder 21 is connected to the first suction valve 24. During the backward movement of the first transport cylinder 21, the suction valve 24 is opened, so that the transport cylinder 21 can suck concrete from the prefill tank 16. During the forward movement of the first transport cylinder 21, the suction valve 24 is closed, allowing the concrete to be transported in the direction of the pump outlet 23. Since the second transfer cylinder 22 is connected to the second intake valve 25, the switching process of the second intake valve 25 is synchronized with the backward movement and the forward movement of the second transfer cylinder 22.

  The pump includes a high density material valve 26 that forms a discharge valve common to both the first transport cylinder 21 and the second transport cylinder 22. The high-density material valve 26 includes a first through opening 27 for concrete carried by the first transfer cylinder 21 and a second through opening 28 for concrete carried by the second transfer cylinder 22. In the first switching state 29, the valve member 32 of the high-density material valve closes the first through opening 27 and keeps the second through opening 28 open. In the second switching state 30, the high density material valve 26 closes the second through opening 28 and keeps the first through opening 27 open. In the third switching state 31 (intermediate state), both through openings 27 and 28 are open.

  The two transfer cylinders 21 and 22 are moved so that the backward movement occurs at a shorter interval than the forward movement. The beginning of one transport cylinder overlaps the end of the forward movement of the other transport cylinder. Therefore, at any moment, the concrete is conveyed from at least one of the conveying cylinders 21 and 22 toward the high-density material valve 26.

  The valve member 32 of the high density material valve 26 is actively switched between different switching states depending on the drive. When the first transfer cylinder 21 is moving forward and the second transfer cylinder 22 is moving backward, the high-density material valve 26 is switched so that only the material flow from the first transfer cylinder 21 passes through the high-density material valve 26. It is in state 30. When the second transfer cylinder 22 is moving forward and the first transfer cylinder 21 is moving backward, the high-density material valve 26 can pass only the material flow from the second transfer cylinder 22 through the high-density material valve 26. It is in a switchable state 29 that can In the overlapped stage where both transfer cylinders 21, 22 are in forward motion, the high density material valve 26 is in an intermediate state 31 where the material flow from the transfer cylinders 21 and 22 can pass through the high density material valve 26.

  The two transfer cylinders 21 and 22 have a basic speed of forward movement. The basic speed of the forward movement is used for each of the transfer cylinders 21, 22 during the reverse movement of the other transfer cylinder. The basic speed defines the flow of material that is transported in the direction of the pump outlet 23 at this stage. In the overlapping stage where both the transfer cylinders 21 and 22 are moving forward, the speed is reduced compared to the basic speed so that the sum of the speeds of the two forward movements becomes the basic speed. In this way, a constant flow of material is maintained in the direction of the pump outlet 23 even in the overlapping stages.

  FIG. 3 is a perspective view of a high density material pump according to the present invention. Since the suction valve 25 is opened, the corresponding suction opening 45 of the pump is opened, and the high-density material can be sucked from the prefill tank 16 (FIG. 1) by the second transport cylinder 22. The first intake valve 24 is in a closed state. When the piston of the first transfer cylinder 21 is moving forward, the material flow passes through the first through opening 27 of the high-density material valve 26 in the direction of the pump outlet 23 (see FIG. 4).

  The operation procedure of the pump will be described with reference to the schematic diagrams of FIGS. In FIG. 5A, the valve member 32 of the high-density material valve 26 is switched to close the through opening 27 of the first transfer cylinder 21, and the valve member keeps the through opening 28 of the second transfer cylinder 22 open. . The suction valve 25 of the second transfer cylinder 22 is closed (see FIG. 5B). The second transport cylinder 22 is in a forward motion and transports concrete through the through opening 28 to the interior space of the high density material valve 26 and to the pump outlet 23. Thanks to the pressure difference between the upstream and downstream of the valve member 32, the sealing effect between the valve member 32 and the through opening 27 is enhanced. Since the suction valve 24 of the first transfer cylinder 21 is opened, the first transfer cylinder 21 can suck the concrete from the prefill tank 16 through the suction opening 44 of the pump while moving backward.

  The backward movement of the first transfer cylinder 21 ends earlier than the forward movement of the second transfer cylinder 22. FIG. 6 shows a state in which the forward movement of the first transfer cylinder 21 starts and the forward movement of the second transfer cylinder 22 is about to end. Both intake valves 24, 25 are closed. Since the first conveying cylinder 21 has increased the pressure again in front of the through-opening 27, the high-density material valve 26 has started to be switched to the intermediate state 31, and there is a very small pressure difference between the upstream and downstream of the valve member 32. Still there. After switching, the high density material valve 26 is in the intermediate state 31 and the valve member 32 keeps both the first through opening 27 and the second through opening 28 open. The forward movement of both the transport cylinders 21 and 22 is decelerated, and both the transport cylinders 21 and 22 transport the amount of material that has been transported only by the second transport cylinder 22 until then.

  After the forward movement of the second transfer cylinder 22 is finished, the suction valve 25 is opened (see FIG. 7B). Due to the pressure reduction, the second transfer cylinder 22 may have already performed the first backward movement before the intake valve 25 is opened. When the suction valve 25 is opened, the second transport cylinder 22 can suck the concrete from the prefill tank 16 through the suction opening 45 of the pump while moving backward. The first transfer cylinder 21 moves forward at its basic speed, and the material flow to the pump outlet 23 is maintained unchanged.

  In FIG. 8, the forward movement of the first transfer cylinder 21 is finished, and the forward movement of the second transfer cylinder 22 is resumed. When the forward movement of the first transfer cylinder 21 is finished, the cycle is finished, and the pump shifts again to the state shown in FIG.

  The valve member 32 of the high-density material valve 26 includes a pivot portion 34 and a sealing portion 35 in accordance with FIG. The pivot part 34 has two parts of the shaft 33, by which the pivot part is rotatably mounted with respect to the pivot axis 36. A connecting structure 48 is formed between the shaft 33 and the sealing part 35, which is represented schematically in FIG. With the connection structure 48, the radial distance between the sealing portion 35 and the shaft 33 can be changed. Further, the connection structure 48 has rigidity against torque. Therefore, when the shaft is rotated by a certain angle, the sealing portion 35 performs the pivoting motion of the same angle.

  The lower surface of the sealing portion 35 forms a sealing surface 38 in the shape of a cylindrical portion centered on the pivot axis 36. The housing of the high density material bulb 26 has matching mating surfaces that are also cylindrically shaped. The through openings 27 and 28 of the high-density material valve 26 are formed on this mating surface. The sealing surface 38 of the valve member 32 interacts with the mating surface of the valve housing, and the through opening 27 or the through opening 28 can be sealed depending on the switching state.

  FIG. 10 shows a state of the high-density material valve in which the internal space of the high-density material valve is at a higher pressure than before the through opening 27 closed by the sealing portion 35. The valve member 32 has an outer surface 43 located opposite the sealing surface 38 and the pressure of the material present in the high density material valve 26 is applied to the outer surface 43 in the radial direction. The pressure difference with the outside serves to enhance the sealing effect between the valve member 32 and the valve housing. The valve member 32 further includes two outer surfaces 44 and 45 that are positioned symmetrically to each other. Since the material pressure on the outer surfaces 44, 45 also has a radial component, the outer surfaces 44, 45 also help enhance the sealing effect.

  In the valve member 32 shown in FIG. 11, the pivot portion 34 includes a nail 50, and the nail 50 engages with the corresponding concave portion of the sealing portion 35. The nail 50 forms a sliding guide, and the sealing portion 35 can move in the radial direction with respect to the shaft 33 along the sliding guide. The sliding guide has rigidity against forces in other directions.

  An elastic material plate 37 is disposed between the pivot portion 34 and the sealing portion 35. The plate 37 is a part of the connection structure between the pivot part 34 and the sealing part 35. Since the plate 37 can be elastically compressed by the pressure in the radial direction, the sealing portion 35 approaches the pivot portion 34 along the sliding guide.

  The factory-adjusted high density material valve 26 according to the invention is sealed with elastic pressure on the valve housing, which is the pressure exerted radially by the plate 37 as a result of the plate 37 being elastically compressed. The part 35 is adapted to expand. If wear of the valve member 32 or the valve housing occurs during the operation of the pump, this can be automatically compensated for by the elastic plate 37 extending. In the suction mode, the plate 37 ensures that a sufficient pressing force is applied between the sealing portion 35 and the valve housing.

  The valve member 32 represented in FIG. 11 is further designed such that a free space is sandwiched between the two stub shafts 33, so that the material flow passes directly through the through openings 27, 28 to the pump outlet. It can move in the direction of 23. The pivot portion 34 includes two support columns 51 and 52, which extend in the radial direction and sandwich a free space between the both. In the radial direction, the free space extends over 50% of the distance between the pivot axis 36 and the sealing surface 38.

  Also in the embodiment of FIG. 12, the free space is similarly sandwiched between the two stub shafts 33 so that the flow of conveyance is easy to move in the direction of the discharge opening. A central column 53 extends in the radial direction and is connected to the sealing portion 35 at the center. There is enough space around the column 53 for the flow of material to move. Furthermore, although not visible in FIG. 12, the elastic plate 37 and the sliding guide form a connection structure similar to that in FIG.

  FIG. 13 shows another embodiment of the valve member 32 according to the present invention. Since the sealing portion 35 extends around the pivot portion 34, the cross section of the pivot portion 34 is in the sealing portion. According to the cross-sectional view of FIG. 14, the pivot portion 34 has a rectangular cross section in the sealing portion 35. The sealing portion 35 has a slot corresponding to a rectangular cross section, and the elastic member 37 is disposed above and below the pivot portion 34 in this, so that the space between the sealing portion 35 and the pivot portion 34 is between them. The sealing part 35 can move radially relative to the pivot part 34 while preventing relative rotational movement. The pivot part 34 includes a lever 39, and a drive device may engage the lever 39 to switch the valve member 32 between different switching states.

  The valve member 32 has such a size that two end surfaces pointing in the axial direction directly lean against the casing 46 of the high-density material valve 26. Both end surfaces of the valve member are configured as spatula 55. During the switching process of the valve member 32, the spatula 55 pushes the high density material to the side along the end face of the housing.

  The side surface 57 of the valve member is configured as a guide surface. Along the guide surface, the material flow is conveyed in the direction of the outlet opening of the high density material valve. A concave portion 56 is provided on the upper side of the valve member 32, and the concave portion 56 facilitates movement of the material in the direction of the discharge opening.

Claims (14)

  A high density material valve comprising a first through opening (27), a second through opening (28), and a valve member (32) associated with both of the through openings (27, 28), wherein the valve member (32) is pivotally mounted with respect to a pivot axis (36), the valve member (32) having a sealing surface (38) curved about the pivot axis (36); In the first state (30), the valve member (32) opens the first through opening (27) and closes the second through opening (28), and in the second state (29), the valve member (32). Opens the second through-opening (28) and closes the first through-opening (27), and the valve member (32) includes a sealing part (35) and a pivot part (34), and the pivot Part (34) is the pivot axis (3 Rotatably mounted, the sealing portion (35) is connected to the pivot portion (34) via a connecting structure (37), high density material valve in).   The high-density material valve according to claim 1, characterized in that the valve member (32) is arranged in the internal space of the high-density material valve.   An intermediate surface having a curved portion centered on the pivot axis (36) is disposed between the first through-opening (27) and the second through-opening (28). The high-density material valve according to claim 1 or 2.   The valve member (32) is located between the first through-opening (27) and the second through-opening (28) in the third switching state, according to any one of claims 1 to 3. The high-density material valve according to item.   5. The high-density material valve according to claim 1, characterized in that the connection structure (37) is rigid to such a torque with respect to the pivot axis (36).   A high according to any one of the preceding claims, characterized in that the connecting structure (37) allows a radial movement of the sealing part (35) relative to the pivot part (34). Density material valve.   The said connection structure is equipped with the elastic member (37) located between the said sealing part (35) and the said pivot part (34), It is any one of Claims 1-6 characterized by the above-mentioned. High density material valve.   8. The elastic member according to claim 1, wherein an elastic member is located between the shaft of the valve member and the housing of the valve. High density material valve.   The valve member (32) includes two stub shafts (33) attached at the pivot axis (36), and the two stub shafts (33) sandwich a free space between each other. The high-density material valve according to any one of claims 1 to 8.   The valve member (32) includes one column (51, 52, 53) extending between the pivot axis (36) and the sealing surface (38), and the column (51, 52, 53). The high-density material valve according to claim 1, wherein the high-density material valve is arranged at a distance from an end face of the housing (46) of the high-density material valve (26). .   The valve member (32) has a spatula (55) and the spatula (55) along the end face of the housing (46) of the high-density material valve (26) during the switching process of the valve member (32). The high-density material valve according to claim 1, wherein the high-density material valve is moved.   The said valve member (32) is provided with the outer surface (43, 44, 45) which converts the pressure difference between the upstream and downstream of the said valve member (32) into the force applied to a radial direction, The 1-11 characterized by the above-mentioned. The high-density material valve according to any one of the above.   13. A high-density material pump having a high-density material valve according to any one of claims 1 to 12, wherein the material being moved by a conveying member of the pump is the first suction opening (27) and / or A high density material pump, characterized in that it is designed to enter the internal space of the high density material pump through the second suction opening (28).   14. High density material according to claim 13, characterized in that it is designed to switch the state of the high density material valve (26) when there is no pressure difference between upstream and downstream of the valve member (32). pump.

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