JP7019924B2 - High density material valve - Google Patents

Description

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

Such valves are used to transport high density materials such as ready-mixed concrete or mortar. In this case, there is 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 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 German Patent Application Publication No. 1020132115990, US Pat. No. 8,827,657, German Patent Application Publication No. 19503986, It is known in German Patent Application Publication No. 102005008938. The valve member has an S-shaped pipe segment shape, and one end thereof can be optionally connected to the first through opening or the second through opening. This is mechanically complicated.

The problem to be solved by the present invention is to propose a high-density material valve having a simpler structure. Starting with the above prior art, this problem is solved by the feature according to claim 1. Suitable embodiments are set forth in the dependent claims.

In the high density material valve according to the present invention, the valve member associated with both through openings is pivotally attached with respect to the pivot axis and has a curved sealing surface around the 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 modification of the present invention, the valve member includes a sealing portion and a pivot portion. The pivot portion is rotatably attached along the pivot axis. The sealing portion is connected to the pivot portion via a connecting structure.

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

High-density material is a general term for media that are difficult to transport. The high-density material is, for example, a substance containing a coarse particulate component, a substance containing an active ingredient, and the like. 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 up to 30 mm in size and is difficult to transport because they combine in an invisible place to form deposits.

The valve member may be located in the interior 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 high density material is further transported. 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 the enclosure of a circular, high density material valve 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 engaging surfaces, the valve member can be rotated around the pivot axis corresponding to the axis of the bend. In this way, one of the openings can have a free flow through it, whereas the sealing surface of the valve member is sealed to each other with the sealing surface of the other through opening. It works. Encapsulation should be understood for application areas where 100 percent airtightness is not required.

In one embodiment, the concentric curved portions correspond to a part of the cylinder outer skin when the cylinder axis is the same as the pivot axis. In this embodiment, the radial distance 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 arranged between the first through opening and the second through opening, and the intermediate surface also 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, and the contour extends from the first through opening through the intermediate surface to the second through opening.

In addition to the above 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 large enough to completely open both through openings. This has the advantage that the edges of the sealing surface are not exposed to the flow of material extending through the openings. It is also possible that one or both through openings are still partially partially covered by the valve member.

The valve member may include a sealing portion and a pivot portion, the pivot portion being rotatably attached along the pivot axis. Since the switching process is performed between different states of the high-density material valve, the electric drive device may be engaged with the pivot portion.

The valve member may be provided with a connection structure that provides a connection between the sealing portion and the pivot portion. The connection structure may be designed to be rigid against the torque applied with respect to the pivot axis. Here, having rigidity means that when the pivot portion bends with respect to the pivot axis, the sealing portion also performs the corresponding pivot movement.

In the radial direction, the connection structure may allow the encapsulation to move relative to the pivot. Such relative movement may adapt the radial spacing between the sealing surface and the pivot axis so that the desired sealing effect is produced between the valve member and the through opening.

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

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

In one variant, the valve member comprises a rigid connection between the sealing surface and a pivotally mounted shaft or a plurality of pivotally mounted stub shafts. This provides radial mobility of the sealing surface with respect to the valve housing when the shaft or stub shaft is elastically attached to the valve housing. For example, one or more elastic members may be provided extending around the shaft or stub shaft. The present 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 within the housing of the high density material valve according to the present invention. The valve member may be placed near the end wall of the housing with the mandrel end perpendicular to the pivot axis. Therefore, the pivotal motion of the valve member is parallel to the end wall. The valve member may be separated from the end wall so that there is a space between the valve member and the end wall even in the coarse particulate component of the high density material. This makes it easier for the valve member to operate.

In another embodiment, the distance between the valve member and the end wall is smaller than the coarse particulate component of the high density material. The valve member may be provided with a spatula that pushes the high density material along the end wall when the valve member is operating, thereby eliminating particles that are tightened 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. The interaction between the valve member and the second end wall can be configured accordingly.

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

The high density material valve according to the present invention may be designed so that the linear connection between the inlet opening and the outlet opening of the high density material valve intersects the pivot axis. If the shaft of the valve member extends continuously along the pivot axis, the material flow must be carried ahead of the shaft along a curved trajectory.

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, and may be particularly oriented so as to be 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 surrounded between the guide surfaces. Depending on the switching state of the valve, the flow of material can be guided along one and / or the other guide surface.

Such a guide surface is particularly advantageous when the valve member is designed so 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.

To keep the flow resistance low, the shaft may be equipped with two stub shafts, which are pulled into the bearings of the valve housing. The connection between the two stub shafts is provided by the 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 connection structure does not extend along the pivot axis, but rather is located near the sealing surface, leaving open space for material flow on the path towards the outlet opening. In particular, the connection structure may be configured so that the straight line extending from the midpoint of the unclosed through opening to the midpoint of the discharge opening does not intersect the valve member.

Due to the connection between the shaft and the sealing portion, the connection structure may have struts extending to the sealing portion. In particular, the stanchions may be oriented in the radial direction. The column may be located in the center of the sealing portion. If the stanchions are spaced from the end walls of the valve housing, the high density material can flow properly around the stanchions.

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

The two columns may be spaced apart from the end wall of the housing. The stanchion may also be configured as a spatula, which pushes the high density material along the end face when the valve member is operating.

When the high density material valve according to the invention is used such that the material flow enters the interior space of the valve through one through opening, passes through the valve member, and exits the valve again 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 so that the pressure difference 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 radially against the sealing surface of the through opening. The directional term radius refers to the pivot axis of the valve member. Therefore, the valve member may have an outer surface that converts the pressure in the internal 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 so as to intersect perpendicular to the radial direction. Then, the pressure applied to the outer surface is directed to directly enhance the sealing effect.

The valve member can also have an outer surface that is tilted with respect to the radial direction so that only part of the pressure is applied towards 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 the 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 by 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 a working drive.

Further, the present invention 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 transport member of the pump 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 transport cylinder and a second transport cylinder. A piston may be arranged in each transfer cylinder, and the piston moves backward while the pump is operating to suck high-density material into the internal space of the transfer cylinder, and moves forward while moving through the high-density material valve. 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 may be combined into a common transport flow and coupled to the high density material valve. The flow of transport 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 flow of transport 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 operated so that the backward movement occurs at shorter intervals than the forward movement. The beginning of the forward motion of one piston may overlap with the end of the forward motion of the other piston. This creates a time interval in which both pistons are transporting material in parallel in the direction of the high density material valve.

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

Assuming that the piston of the first transport cylinder is moving backward and the piston of the second transport 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 internal space of the high density material valve substantially corresponds to the pressure exerted on the material by the piston of the second transport cylinder by the forward motion. The suction pressure of the first transport cylinder is generated upstream of the first through opening, but 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, assuming that the piston of the second transport cylinder is moving backward and the piston of the first transport cylinder is moving forward, a similar pressure difference will occur between the upstream and downstream of the first through opening of the high-density material valve. be.

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. Therefore, it is preferable that the switching process occurs only when the retracting motion of the piston whose through opening is closed by the valve member is completed. It may be even more preferred that the switching process occur only when each piston initiates a forward motion and pressure has already accumulated again in front of each through opening.

The high density material valve may be designed so that the switching process is completed before the retracting motion of the other piston begins. 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 open, through an intermediate state in which neither through opening is closed, one of the through openings is closed or open. The switching process may be designed so that the valve member can be transferred to the 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 suction mode, the pump may be operated in the opposite direction. The suction mode may, for example, serve to clean high density material valves and attached transport lines or to remove obstacles in this area. Then, 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 reduce the sealing pressure of the valve member. Therefore, the valve member should be designed so that the force applied in the direction of the through opening is exerted on the sealing portion through the pivot portion and has a sufficient sealing effect even in such a negative pressure difference.

The present invention will be described below as an example by preferred embodiment with reference to the accompanying drawings.

A vehicle with a high density material pump provided with the high density material valve according to the present invention. Block diagram (by hydraulic symbol) of a high density material pump with a high density material valve according to the present invention. Perspective view of a high density material pump with a high density material valve according to the present invention. FIG. 3 is a cross-sectional view of the pump of FIG. FIG. 3 is a schematic view showing the state of the high-density material pump of FIG. 3 (FIG. 5A shows the state of the valve member, and FIG. 5B shows the state of the valve). FIG. 6A is a schematic view showing another state of the high density material pump of FIG. 3 (FIG. 6A shows the state of the valve member, FIG. 6B shows the state of the valve). FIG. 7A is a schematic view 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 view showing still another state of the high-density material pump of FIG. 3 (FIG. 8A shows the state of the valve member, FIG. 8B shows the state of the valve). The schematic diagram of the valve member which concerns on this invention. The figure which shows the pressure applied to the sealing part of a valve member. A valve member of a high-density material valve according to the present invention, partly represented by a cross-sectional view. A valve member according to another embodiment of the present invention. A valve member according to still another embodiment of the present invention. FIG. 13 is a cross-sectional view of the embodiment of FIG.

A concrete pump-like high-density material pump 15 is arranged 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 concrete from the prefill tank and conveys the concrete through a connecting pipe 17 extending along the delivery boom 18. The delivery boom 18 is mounted on the pivot ring 19 and can be unfolded by several seams to position 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 transport cylinders 21 and 22 includes a piston, and the piston sucks concrete from the prefill tank 16 while moving backward, and transports concrete in the direction of the outlet 23 of the pump while moving forward.

The first transfer cylinder 21 is connected to the first suction valve 24. Since the suction valve 24 is opened during the retracting movement of the first transport cylinder 21, 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 concrete to be transported in the direction of the pump outlet 23. Since the second transfer cylinder 22 is connected to the second suction valve 25, the switching process of the second suction valve 25 synchronizes with the backward movement and the forward movement of the second transfer cylinder 22.

The pump comprises a high density material valve 26 that forms a common discharge valve for both the first transfer cylinder 21 and the second transfer 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. 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 first switching state 29. 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 transport cylinders 21 and 22 are moved so that the backward movement occurs at shorter intervals than the forward movement. The beginning of one transport cylinder overlaps with the end of the forward motion of the other transport cylinder. Therefore, at any moment, concrete is transported from at least one of the transport 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 transport cylinder 21 is moving forward and the second transport cylinder 22 is moving backward, the high-density material valve 26 switches so that only the flow of material from the first transport cylinder 21 can pass 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 may allow only the flow of material from the second transfer cylinder 22 to pass through the high-density material valve 26. It is in the switching state 29 that can be performed. In the overlapping stage where both the transfer cylinders 21 and 22 are in forward motion, the high density material valve 26 is in an intermediate state 31 where the flow of material from the transfer cylinders 21 and 22 can pass through the high density material valve 26.

The two transport cylinders 21 and 22 have a basic speed of forward movement. The basic speed of the forward movement is such that the other transport cylinder is used during the backward movement for each of the transport cylinders 21 and 22. The basic velocity defines the flow of material conveyed in the direction of the pump outlet 23 at this stage. In the overlapping stage where both the transport cylinders 21 and 22 are in forward motion, the speed is slower than the basic speed so that the sum of the speeds of the two forward motions is the basic speed. In this way, a constant flow of material is maintained in the direction of the pump outlet 23 during the overlap step.

FIG. 3 is a perspective view of a high-density material pump according to the present invention. Since the suction valve 25 is in the open state, the corresponding suction opening 45 of the pump is open, and the high-density material can be sucked from the prefill tank 16 (FIG. 1) by the second transfer cylinder 22. The first suction valve 24 is in a closed state. When the piston of the first transport cylinder 21 is in forward motion, 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 views of FIGS. 5 to 8. 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 transport cylinder 22 is closed (see FIG. 5B). The second transport cylinder 22 is in forward motion and transports concrete through the through opening 28 to the internal space of the high density material valve 26 and to the pump outlet 23. Due 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 transport cylinder 21 is open, the first transport cylinder 21 can suck concrete from the prefill tank 16 through the suction opening 44 of the pump while moving backward.

The retracting motion of the first transport cylinder 21 ends earlier than the forward motion of the second transport 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 the intake valves 24 and 25 are closed. Since the first transport cylinder 21 increased the pressure again in front of the through opening 27, the switching of the high-density material valve 26 to the intermediate state 31 has started, and there is a very slight pressure difference between the upstream and downstream of the valve member 32. There are still. 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 the amount of material previously transported only by the second transport cylinder 22 is now transported by both the transport cylinders 21 and 22.

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

In FIG. 8, the forward movement of the first transfer cylinder 21 is completed, and the forward movement of the second transfer cylinder 22 is resumed. When the forward movement of the first transport cylinder 21 is completed, the cycle ends, and the pump shifts to the state shown in FIG. 5 again.

The valve member 32 of the high-density material valve 26 includes a pivot portion 34 and a sealing portion 35 according to FIG. The pivot portion 34 has two portions of the shaft 33, which are rotatably attached to the pivot portion with respect to the pivot axis 36. A connection structure 48 is formed between the shaft 33 and the sealing portion 35, which is merely schematically represented in FIG. The connection structure 48 makes it possible to change the radial distance between the sealing portion 35 and the shaft 33. Further, the connection structure 48 has rigidity to torque. Therefore, when the shaft is rotated by a certain angle, the sealing portion 35 performs a pivotal motion at 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 valve 26 has matching mating surfaces, also in the shape of a cylindrical portion. The through openings 27 and 28 of the high-density material valve 26 are formed on the mating surfaces. 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 a high-density material valve in which the internal space of the high-density material valve has a higher pressure than in front of 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 in the radial direction with respect to the outer surface 43. The pressure difference from the outside helps to enhance the sealing effect between the valve member 32 and the valve housing. The valve member 32 further has two outer surfaces 44, 45 located symmetrically with each other. Since the pressure of the material applied to 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 meshes with the matching recess of the sealing portion 35. A sliding guide is formed by the nail 50, 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.

A plate 37 made of an elastic material is arranged between the pivot portion 34 and the sealing portion 35. The plate 37 is part of a connection structure between the pivot portion 34 and the sealing portion 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 high-density material valve 26 according to the present invention in the factory-adjusted state is sealed with elastic pressure on the valve housing, which is the pressure exerted by the plate 37 in the radial direction as a result of the plate 37 being elastically compressed. The portion 35 is adapted to spread out. If the valve member 32 or the valve housing is worn during the operation of the pump, the elastic plate 37 can be stretched to automatically compensate for the wear. 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 shown in FIG. 11 is further designed so that a free space is sandwiched between the two stub shafts 33, so that the material flow pumps out the direct passage from the through openings 27, 28. It can move in the direction of 23. The pivot portion 34 includes two columns 51 and 52, which extend radially and sandwich a free space between them. In the radial direction, the free space extends over 50% or more of the distance between the pivot axis 36 and the sealing surface 38.

Also in the embodiment of FIG. 12, a free space is similarly sandwiched between the two stub shafts 33 so that the transport flow can easily move in the direction of the discharge opening. The central column 53 extends in the radial direction and is connected to the sealing portion 35 at the center. There is sufficient space around the stanchions 53 for the flow of material to move. Further, 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 represents 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 contained 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 groove hole corresponding to a rectangular cross section, in which the elastic member 37 is arranged above and below the pivot portion 34, so that the sealing portion 35 is located between the sealing portion 35 and the pivot portion 34. The sealing portion 35 can move in the radial direction with respect to the pivot portion 34 while the relative rotational movement is prevented. The pivot portion 34 includes a lever 39, and the drive device may engage the lever 39 in order to switch the valve member 32 between different switching states.

The valve member 32 has a size such that two end faces pointing in the axial direction directly lean against the housing 46 of the high-density material valve 26. Both end faces of the valve member are configured as spatulas 55. During the switching process of the valve member 32, the spatula 55 pushes the high density material toward 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 towards the outlet opening of the high density material valve. A recess 56 is provided on the upper side of the valve member 32, and the recess 56 facilitates the flow of 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 the through openings (27, 28), wherein the valve member. (32) is pivotally attached with respect to the pivot axis (36), the valve member (32) has a sealing surface (38) curved about the pivot axis (36), and the first. In one 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). The second through opening (28) is opened and the first through opening (27) is closed, and the valve member (32) includes a sealing portion (35) and a pivot portion (34). A portion (34) is rotatably attached at the pivot axis (36), the sealing portion (35) is connected to the pivot portion (34) via a connection structure (37) .
A high-density material valve in which the high-density material valve has a third switching state in which both the first through-opening (27) and the second through-opening (28) are at least partially opened . The high-density material valve according to claim 1, wherein the valve member (32) is arranged in an internal space of the high-density material valve. An intermediate surface having a curved portion centered on the pivot axis (36) is arranged between the first through opening (27) and the second through opening (28). The high density material valve according to claim 1 or 2. One of claims 1 to 3, wherein the valve member (32) is located between the first through opening (27) and the second through opening (28) in the third switching state. The high density material valve according to one item. The high-density material valve according to any one of claims 1 to 4, wherein the connection structure (37) has rigidity to the applied torque with respect to the pivot axis (36). The height according to any one of claims 1 to 5, wherein the connection structure (37) allows radial movement of the sealing portion (35) with respect to the pivot portion (34). Density material valve. The invention according to any one of claims 1 to 6, wherein the connecting structure includes an elastic member (37) located between the sealing portion (35) and the pivot portion (34). High density material valve. The invention according to any one of claims 1 to 7, wherein an elastic member is located between the shaft (33) of the valve member (32) and the housing (46) of the valve. High density material valve. The valve member (32) comprises two stub shafts (33) attached at the pivot axis (36), and the two stub shafts (33) sandwich a free space between them. The high-density material valve according to any one of claims 1 to 8. The valve member (32) comprises one strut (51, 52, 53) extending between the pivot axis (36) and the sealing surface (38), and the strut (51, 52, 53). The high-density material valve according to any one of claims 1 to 9, wherein the high-density material valve (26) is arranged at a distance from the 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) is provided along the end surface 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 any one of claims 1 to 9, wherein the valve is moved. Claims 1 to 11 include the valve member (32) including an outer surface (43, 44, 45) that converts a pressure difference between the upstream and downstream sides of the valve member (32) into a force applied in the radial direction. The high density material valve according to any one of the above. In the high-density material pump having the high-density material valve according to any one of claims 1 to 12, the material moved by the transport member of the pump is the first through 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 valve through the second through opening (28). 13. The 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 the upstream and downstream of the valve member (32). pump.

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