JP3860951B2 - Slurry pressure feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slurry pumping device for pumping slurry-like materials such as concrete, tunnel excavated soil, dredged soil and the like containing water.
[0002]
[Prior art]
As this type of slurry pressure feeding device, an apparatus main body having an internal space part to which slurry is supplied and a wall part in which a plurality of connection holes opening facing the internal space part are formed, and on the outside of the apparatus main body Each cylinder is connected to the connection hole formed in the wall portion of the apparatus main body, and each piston sucks the slurry supplied to the space of the apparatus main body into the cylinder, and the sucked slurry A plurality of sets of piston-cylinder mechanisms for alternately discharging the cylinders from the cylinder, and connected to each connection hole formed in the wall of the apparatus main body and disposed in the apparatus main body. A plurality of connection positions for receiving and flowing slurry discharged from the cylinder can be alternately switched and displaced, and the upstream opening end on the upstream side in the slurry pumping direction can be There is having a connection pipe connection holes are supported on the apparatus body is contacted to the formed wall inner surface.
[0003]
  That is, in this slurry pumping device, the slurry isInternal spaceAnd each piston-cylinder mechanism alternately moves the piston back and forth., The internal spaceThe suction operation to suck the slurry supplied to the cylinder and the sucked slurryCylinderA discharge operation is performed to discharge from.
  Displacement of connecting pipe according to piston discharge operation in multiple sets of piston-cylinder mechanismLetThe slurryofPumping directionAlongCylinder that performs discharge operation at upstream open endCorresponding toConnect to the connection hole. When the piston pressurizes the slurry sucked into the cylinder, the slurry is pushed out of the cylinder and connected to the connection hole of the apparatus body.Through the connecting pipeIt is pumped to the placement site.
[0004]
By the way, in this slurry pressure feeding device, when the piston pushes the slurry from the cylinder through the connection hole of the apparatus main body to the connection pipe, the opening of the connection hole on the inner surface of the wall portion of the apparatus main body and the upstream opening end of the connection pipe in the pressure feeding direction In order not to leak from the space, the inner wall surface of the apparatus main body and the open end of the connection pipe are in contact with each other. The connection pipe is switched and displaced between the connection positions in a state where the open end is in contact with the inner surface of the wall of the apparatus main body. For this reason, wear occurs due to sliding contact between the open end of the connection pipe and the wall portion inner surface of the apparatus main body, and when wear progresses, it is necessary to replace parts. Therefore, in order to provide wear resistance to the opening end of the connecting pipe and the inner surface of the wall of the apparatus main body and to facilitate replacement of parts accompanying wear, a liner ring is inserted into the connection hole of the apparatus main body wall. Some have adopted a configuration in which a plate is disposed on the inner surface of the wall and a wear ring that contacts the plate is disposed at the open end of the connecting pipe.
[0005]
  FIG. 10 is a cross-sectional view showing a conventional connecting portion between the apparatus main body and the connecting pipe, and shows one connecting hole portion. In the figure, 101 is an apparatus main body, 102 is a connection hole formed in a wall portion of the apparatus main body 101, 103 is a cylinder of a piston-cylinder mechanism arranged outside the apparatus main body 101, and the open end of the cylinder 103 is an apparatus end. It is connected to the connection hole 102 of the main body 101.
  A plurality of connection holes 102 are formed horizontally in the wall portion of the apparatus main body 101, and a plurality of piston-cylinder mechanisms are provided corresponding to the connection holes 102, and each cylinder 103 corresponds to a corresponding connection hole 102. Facing each other.
  The connection pipe 104 is provided inside the apparatus main body 101 so as to switch and displace between connection positions connected to the plurality of connection holes 102, and has an open end upstream of the slurry in the pumping direction.WearingIs the wall of the apparatus main body 101InsideInOppositeis doing.
  A recess 105 surrounding the connection hole 102 is formed on the inner surface of the wall portion of the apparatus main body 101. A plate 106 is attached to the recess 105 by fitting, and a hole 106 a that faces the connection hole 102 is formed in the plate 106.
  Reference numeral 107 denotes a liner ring. The liner ring 107 is inserted between the opening end of the cylinder 103 and the inner surface of the plate 106 inside the connection hole 102 of the apparatus main body 101. 108 is a wear ring attached to the open end of the connecting pipe 104, and this wear ring 108 contacts the outer surface of the plate 106.
[0006]
The bottom surface of the concave portion 105 of the apparatus main body 101 and the end surface of the liner ring 107 at the opening end on the downstream side in the pumping direction are located on the same plane, and the bottom surface of the concave portion 105 of the apparatus main body 101 and one side surface of the plate 106 And the contact portion where the end surface of the opening end on the downstream side in the pressure feeding direction of the liner ring 107 and one side surface of the plate 106 contact each other are located directly adjacent to each other on the same plane and are continuous at the shortest distance. is doing.
[0007]
Here, the liner ring 107 is used to protect the connection hole 102 between the plate 106 and the cylinder 103, and the downstream opening end in the pressure feeding direction of the liner ring 107 is the bottom surface of the recess 105 of the apparatus main body 101. Is because the dimensions are set based on the bottom surface of the concave portion 105 of the apparatus main body 101.
[0008]
  Then, the connection pipe 104 is at a connection position facing the connection hole 102 of the apparatus main body 101.ReachAnd wear ring of connecting pipe 104108Of the apparatus body 101 comes into contact with the outer surface of the plate 106 of the apparatus main body 101. A hydraulic mechanism (not shown)104The cylinder103Force towards the sideIn addition, Wear ring108Is pressed against the plate 106.
[0009]
[Problems to be solved by the invention]
  This slurry pressure feeder has the following problems.
  The plate 106 is fitted into the concave portion 105 of the wall portion of the apparatus main body 101, and the connection hole 102 isLiner ringIn the place where the 107 is inserted, in the liner ring 107 from the relationship between the manufacturing dimensions of the recess 105, the plate 106 and the liner ring 107 and the assembly dimensions for assembling the recess 105, the plate 106 and the liner ring 107.SlurryThe end surface of the opening end on the downstream side in the pumping direction and one side surface of the plate 106 cannot be in uniform surface contact with each other.Between the liner ring 107 and the plate 106There may be gaps.
  Then, slurryTheLiner ring 107, hole 106a of plate 106 and wear ring from cylinder 103108In the liner ring 107, the fine particles contained in the slurry become a high-speed jet flow when pumped to the connecting pipe 104 throughSlurryIt penetrates into a gap formed at the contact portion between the end face of the opening end on the downstream side in the pumping direction and one side face of the plate 106.
[0010]
  The jet of fine particles easily and directly enters the contact portion between the bottom surface of the recess 105 of the apparatus main body 101 and one side surface of the plate 106. For this reason,The bottom surface of the recess 105 and one side surface of the plate 106 are worn by the jet of fine particles.Between theseA void is formed, and this void grows and the slurry is pumped.Connection holeFrom 102 to another adjacent connection hole (not shown)Connection holeWill be connected to each other.
  ThenConnection holeSlurry that is pumped through 102 passes through the gap between the end face of the liner ring 107 and the side face of the plate 106 to another adjacent connection hole.Flows in.As a result,Connection holeThe amount and pressure of the slurry pumped through 102Drop and slurryPumping becomes difficult.
[0011]
  In general, the plate 106,When the contact surface with the wear ring 108 is worn by the swinging of the connecting pipe 104, the bottom surface side of the concave portion 105 which is not worn is the wear ring 108 side, and the worn portion is filled with a repair agent and repaired. Flip it to the bottom sideReuseTo be done.
  However, as described above, the fine particles contained in the slurry become a high-speed jet flow, and the liner ring 107ofWhen the gap portion formed at the contact portion between the end surface of the open end and one side surface of the plate 106 enters, the plate106The repair agent filled in will peel off,The same situation as described above occurs.
[0012]
It is an object of the present invention to provide a slurry pressure feeding device having improved sealing performance at a contact portion between a liner ring provided in a connection hole of a device main body and connected to a cylinder and a plate provided in the device main body and contacted with a connection pipe. To do.
[0013]
[Means for Solving the Problems]
  In order to achieve the above object, a slurry pumping apparatus according to one embodiment of the present invention includes:
  An apparatus main body having an internal space portion to which slurry is supplied and a wall portion in which a plurality of connection holes opening in the internal space portion are formed;
  A plurality of cylinders arranged outside the apparatus main body and respectively connected to the connection holes, a suction operation for sucking slurry supplied to the internal space of the apparatus main body into the cylinder, and the sucked slurry A plurality of piston-cylinder mechanisms having a plurality of pistons that alternately perform a discharge operation of discharging from the cylinder;
  It is arranged inside the apparatus main body, is connected to the connection hole, and can be alternately switched to a plurality of connection positions for receiving the slurry discharged from the cylinder of the piston-cylinder mechanism, and in the pressure direction of the slurry. A connecting pipe supported by the apparatus main body with the wear ring at the upstream opening end along the wall facing the inner surface of the wall,
  A concave portion surrounding the connection hole is formed on the inner surface of the wall portion of the apparatus main body, and a plate that has a hole facing the connection hole and contacts the wear ring is fitted into the concave portion, and the connection hole InsideDifferent from the plateThe liner ring is inserted,
  The plate and the liner ring have a contact portion between the bottom surface of the recess and the side surface of the plate facing the bottom surface of the recess from the inside of the connection hole.Connection holeAlong the axial directionThe outer circumference of the liner ringIt is characterized by being combined so as to be sealed at the surface.
[0014]
  According to a second aspect of the present invention, in the slurry pressure feeding device according to the first aspect, the liner ring is inserted from the connection hole to the hole of the plate.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0019]
  In the figure, 1 is an apparatus main body comprising a housing 2 and a housing lid 3, 4 and 5 are two piston-cylinder mechanisms, 6 is a connecting pipe, and 7 is a connecting pipe.6The otherAnd the other connection positionSwitching drive mechanism for switching displacement between the two, 8 is a connecting pipe6Against the edge of the device body1This is a hydraulic circuit (pressurizing circuit) that applies hydraulic pressure (pressure) so as to be in press contact with the wall portion.
[0020]
The apparatus main body 1 will be described. The housing 2 has a structure in which the housing structure 2a and the housing structure 2b are abutted on a horizontal axis and connected by a bolt 13, and includes a bearing portion 12 that forms a horizontal cylindrical body with the internal space portion 11, and includes an internal space. One end surface portion facing the portion 11 and the other end surface portion facing the bearing portion 12 are opened. The housing lid 3 is disposed outside one open end surface portion of the housing 2, and an upper end portion thereof is supported so as to be able to be swung up and rotated by a shaft 14 provided along the direction orthogonal to the axis of the housing 2. The end face of the housing 2 is normally closed and closes the end face of the housing 2 and is turned upward by the hydraulic piston-cylinder mechanism 15 to open the end face of the housing 2. The housing lid 3 is formed with a pair of connection holes 16 and 17 that are circular at positions spaced equidistantly across the central axis O3-O3. The pair of connection holes 16 and 17 are located below the center axis O1-O1 of the housing 2 and on the same circle drawn around the center axis O1-O1. A hopper 20 for introducing slurry is provided on the open upper surface of the internal space 11 in the housing 2.
[0021]
  2 and 3,Reference numeral 18 denotes a plate provided on the inner surface of the housing lid 3 which is a wall portion of the apparatus main body 1, and 19 denotesHousing lid 3Liner rings 19 are respectively provided in the inner peripheral portions of the pair of connection holes 16 and 17, and these liner rings 19 are provided in a form described later.
[0022]
  Two sets of piston-cylinder mechanisms 4, 5,Cylinders 4a and 5a and piston4b5b. Two sets of piston-cylinder mechanisms 4 and 5 are provided outside the housing lid 3 in the apparatus main body 1.,A pair of connection holes 16 and 17 formed in the housing lid 3 are horizontally disposed opposite to each other, and the cylinders 4a and 5aThe front end opening is connected to the connection holes 16 and 17 of the housing lid 3.
  In FIG.21 and 22,Two sets of driving piston-cylinder mechanisms having cylinders 21a, 22a and pistons 21b, 22b. The pistons 21b, 22b of the driving piston-cylinder mechanisms 21, 22 are,It is driven by pressure oil supplied to and discharged from the cylinders 21a and 22a. The pistons 4b, 5b in the two sets of piston-cylinder mechanisms 4, 5 are connected to and driven by the pistons 21b, 22b of the driving piston-cylinder mechanisms 21, 22.
[0023]
In the two sets of piston-cylinder mechanisms 4 and 5, when the pistons 4b and 5b move backward away from the apparatus main body 1, the slurry charged into the internal space 11 of the apparatus main body 1 is put into the cylinders 4a and 5a. When the piston 4b and 5b move forward to approach the apparatus main body 1, the slurry sucked into the cylinders 4a and 5a is discharged into the internal space portion 11 of the apparatus main body 1 when sucked.
[0024]
The connecting pipe 6 is a cylindrical pipe whose both ends are open and has the same diameter as the pair of connecting holes 16 and 17 formed in the housing lid 3. The connecting pipe 6 is disposed inside the housing 2, and is disposed in the inner space portion 11 of the housing 2 and a supported portion 6 b that is horizontally disposed on the bearing portion 12 of the housing 2 and is rotatably supported. And a bent portion 6a that gently curves downwardly in an S-shape toward the pair of connection holes 16 and 17 formed in the housing lid 3 from the supported portion 6b. The bent portion 6a is curved from the supported portion 6b with a radius corresponding to the radius of a circle drawn around the central axis O1-O1 of the housing 2 where the pair of connection holes 16, 17 are located, and the opening thereof One end, which is an end, is perpendicular to the inner surface of the housing lid 3. In the figure, O1-O2 is the central axis of the bent portion 6a.
[0025]
When the connecting tube 6 rotates the bent portion 6a around the supported portion 6b, the opening end of the bent portion 6a moves on a circle where the pair of connecting holes 16, 17 are located, and becomes a pair of connecting holes 16, 17 Each is opposite. In other words, the bent portion 6a rotates about the supported portion 6b on the same radial line, and the edge of the opening end thereof communicates with one connection hole 16 formed in the wall portion of the apparatus main body 1 oppositely. The connection position A and the other connection position B oppositely communicating with the other connection hole 17 are switched and displaced.
[0026]
  Further, the opening edge of the bent portion 6a of the connecting pipe 6 is,Wear ring 23 having the same diameter as connecting pipe 6Installed. Wear ring 23 isIt contacts the plate 18 facing the inner surface of the housing lid 3. As for this wear ring 23, the bending part 6a has each connection hole.When facing 16 and 17The two are sealed in a liquid-tight manner by contact with the plate 18. The plate 18 and the wear ring 23 are made of a material that is excellent in wear resistance and that can be in liquid-tight contact with each other, such as metal or synthetic resin.Connection pipe 6The other end, which is the open end of the supported portion 6b,,A discharge pipe 24 is attached.
[0027]
  The supported portion 6b of the connecting pipe 6 is,Rotatable at the bearing 12 of the housing 2 andAxis moveableIt is supported by. That is, outside the supported portion 6b of the connecting pipe 6,A driving liner 31 made of a cylindrical body is arranged concentrically, and an outer peripheral portion of the driving liner 31 is,Supported part 6bofSupported by a pair of bearings 32 having a bush shape disposed at both ends.,The housing 2 (supported portion 6b) is provided so as to be capable of rotating around the central axis O1-O1 and moving along the central axis O1-O1.
  A spline portion 33 formed along the axial direction on the outer peripheral surface of the supported portion 6b of the connecting pipe 6 and an axial direction formed on the inner peripheral surface of the drive liner 31 surrounding the supported portion 6b from the outside.WasThe spline portion 34 is slidably engaged with each other, and the supported portion 6b, that is, the connecting pipe 6 is rotatable and axiallyInIt is supported movably.
  An end surface 34a in the axial direction inner space portion of the spline portion 34 in the drive liner 31 is,When the spline portion 33 of the connecting pipe 6 abuts against the axially opposite inner space portion side end surface 33a from the axially opposite inner space portion side, and the drive liner 31 moves toward the inner space portion 11 along the axial direction.,The spline 34 pushes the spline 33The supported part 6bMove toward the internal space 11. That is,Driving liner31 moves the connecting pipe 6 toward the internal space 11.
[0028]
A spline portion 35 is formed on the outer peripheral portion of the supported portion 6b of the connecting pipe 6 so as to be located in the axial center and along the axial direction. The spline portion 35 is adjacent to the axially opposite inner space side end surface. A bearing 36 is fitted. A piston ring 37 surrounding the supported portion 6 b of the connection pipe 6 is disposed in the bearing portion 12 of the housing 2 at a position adjacent to the thrust bearing 36 on the side opposite to the inner space portion in the axial direction. It is fitted and supported so as to be movable along the direction. That is, the piston ring 37 supports the supported portion 6b of the connecting pipe 6 so as to be movable. When the piston ring 37 moves along the axial direction toward the internal space portion 11, the spline portion 35 of the drive liner 31 is pressed toward the internal space portion 11 of the apparatus main body 1 (housing 2) via the thrust bearing 36. As a result, the piston ring 37 moves the drive liner 31 toward the internal space 11.
[0029]
  The outer peripheral surface of the piston ring 37 is,The portion on the inner space portion side through the stepped portion becomes the large diameter portion 37a, and the portion on the anti-internal space portion side becomes the small diameter portion 37b.Yes. Also,The inner peripheral surface of the bearing portion 12 in the housing 2 is,A portion on the inner space portion side is a large-diameter portion 12a and a portion on the anti-internal space portion side is a small-diameter portion 12b via the stepped portion.
  AndThe large-diameter portion 37a of the piston ring 37 and the large-diameter portion 12a of the bearing portion 12 areWith mating contactSmall diameter portion 37b of the piston ring 37 and small diameter portion 12b of the bearing portion 12And mating contactAndAt the center of these axial directions, A part of the large diameter portion 37 a of the piston ring 37 and the bearing portion 12.A part of the small diameter portion 12b is combined with each other.
  ThisSmall diameter portion 37b of the piston ring 37And step,Large diameter portion 12a of the bearing portion 12The step ofCombinedA cylindrical gap 38 surrounding the entire circumference of the piston ring 37 in the circumferential direction is formed.
  Further, the bearing portion 12 of the housing 2 is used.The gapIn the position corresponding to 38,Penetrates the bearing 12Oil holes 39 are formed. This oil hole 39,Hydraulic circuit (pressurizing circuit) 8 to be described laterAnd voids38 is communicated. As will be described later,When pressure oil is fed from the hydraulic circuit 8 into the gap 38, the gap 38ofThe pressure oil inside the piston ring 37Small diameter partActing on 37bThe piston ring 37 is adapted to act on the internal space 11 of the apparatus main body 1 (housing 2)..
[0030]
Seal rings 40, 41, 42 are provided between the bearing portion 12 of the housing 2 and the supported portion 6 b of the connecting pipe 6.
[0031]
  About switching drive mechanism 7Refer to FIG. 2 and FIG.explain. In the figure, reference numeral 51 denotes a switching ring in which a spline portion 43 is formed on the inner periphery.,Engage the spline portion 43 with the spline portion 35 formed on the outer peripheral portion of the drive liner 31.by doingThe outer peripheral part of the drive liner 31 is fitted.
  In the upper part of the bearing 12 of the housing 2,A long hole 53 extending at an equiangular range is formed on both sides in the circumferential direction with the central axis O1-O1 as a center, and is projected on the upper portion of the switching ring 51.WasArm 54Is a long holeIt projects to the upper side of the bearing portion 12 through 53. The entire angle range of the long hole 53 is such that the connecting pipe 6 can switch and displace the bent portion 6a between one connection position A and the other connection position B with the supported portion 6b as a fulcrum.
[0032]
The switching displacement of the connecting pipe 6 is achieved by providing detectors such as proximity switches at both ends of the long hole 53 of the housing 2 (positions corresponding to one connection position A and the other connection position B), respectively. When the arm 54 of 51 is moved to both ends of the long hole 53, the detector is operated to detect.
[0033]
  In the figure, reference numeral 55 denotes a piston-cylinder mechanism having a piston 55b and a cylinder 55a, which is provided outside the apparatus main body 1 along a direction orthogonal to the housing central axis O1-O1. Piston 5 of piston-cylinder mechanism 555The tip of the rod at b is rotatably connected to the arm 54 via a roller 56 that is rotatably provided on the arm 54 of the switching ring 51.
[0034]
The hydraulic circuit 8 is a gap 38 formed between the peripheral wall of the bearing portion 12 and the piston ring 37 through an oil hole 39 formed in the peripheral wall of the bearing portion 12 of the housing 2 by the pump P with the oil accumulated in the tank T. Supply against.
[0035]
  Here, the plate 18 which is a feature of the present invention andLiner ringAbout combination with 19,2, 3 and 7In reference toexplain.
[0036]
  The plate 18 and the liner ring 19 basically have a gap formed between the bottom surface of the recess and the side surface of the liner ring 19 facing the bottom surface of the recess from the inside of the connection holes 16 and 17.Connection holeAlong the axial directionThe outer circumference of the liner ringCombined to block at the surface.
[0037]
  A pair of connection holes 16 and 17 penetrating the inner and outer sides of the apparatus main body 1 are formed in the housing lid 3, which is an example of a wall portion of the apparatus main body 1, arranged in the horizontal direction. A recess 71 is formed on the inner surface of the housing lid 3 so as to surround the connection holes 16 and 17. The recess 71 needs to have an area and a shape that collectively surround at least the pair of connection holes 16 and 17.housingWhile occupying a lot of the area of the lid 3housingIt has a shape along many parts of the outline of the lid 3. The bottom surface of the recess 71 forms a plane along a direction perpendicular to the central axis of the connection holes 16 and 17.
[0038]
  The plate 18 forms a flat plate that comes into contact with the wear ring 23 attached to the open end of the connection pipe 6 and seals between the connection pipe 6 and the connection holes 16 and 17. The plate 18 has the same area and shape as the recess 71 and has a thickness corresponding to the depth of the recess 71. Here, the thickness of the plate 18 is such that the gap formed between the bottom surface of the recess 71 and the side surface of the plate 18 facing the bottom surface of the recess 71 when the plate 18 is combined with the liner ring 19. , 17 can be covered from the inside.
  Circular holes 72 are formed in the plate 18 at positions facing the connection holes 16 and 17 of the housing lid 3. The hole 72 has a small diameter portion 72 a and a large diameter portion 72 b arranged in the thickness direction of the plate 18. The large diameter portion 72b of the hole 72 ishousingThe diameter of the connection holes 16 and 17 of the lid 3 is the same as the diameter (the outer diameter of the liner ring 19). The small diameter portion 72 a of the hole 72 has the same diameter as the inner diameter of the liner ring 19. The large-diameter portion 72b is for inserting the liner ring 19, and the length (depth) of the plate 18 in the thickness direction will be described later.housingThis is set in consideration of ensuring a necessary sealing property for the contact portion between the bottom surface of the recess 71 of the lid 3 and the side surface of the plate 18.
[0039]
  And the direction of the plate 18 is set so that the large-diameter portion 72b of the hole 72 faces the bottom surface side of the recess 71.housingIt is fitted into a recess 71 formed on the inner surface of the lid 3, and one side surface 18a of the plate 18 is disposed in contact with the bottom surface 71a of the recess 71, and is fixed by an appropriate means such as bolting, adhesion, or welding. ing.
[0040]
  Different from plate 18The liner ring 19 has an outer diameter that is the same as the diameter of the connection hole 16 of the housing lid 3, and has a length that can be inserted over the connection hole 16 and the large diameter portion 72 b of the hole 72 in the plate 18. . The liner ring 19 is inserted into the connection hole 16 of the housing lid 3, and one end opening is inserted into the large diameter portion 72 b of the hole 72 of the housing lid 3, and the outer peripheral surface of the liner ring 19 is the connection hole 16. The inner peripheral surface and the inner peripheral surface of the large-diameter portion 72b are in close contact with each other. The large diameter portion 72b of the hole 72 is fitted and disposed with a seal ring 73 that comes into contact with the end surface of the liner ring 19 at a corner where a step surface 72c that is a boundary between the large diameter portion 72b and the small diameter portion 72a intersects. ing.
[0041]
  Also,housingThe tip openings of the cylinders 4a and 5a of the piston-cylinder mechanisms 4 and 5 are connected to the connection holes 16 and 17 of the lid 3 in a state where the liner ring 19 is inserted.
[0042]
  In the configuration of such a combination of the plate 18 and the liner ring 19,housingA contact portion between the bottom surface 71 a of the recess 71 and the side surface 18 a of the plate 18 in the lid 3 is sealed along the connection hole central axis direction by the outer peripheral surface of the liner ring 19 over the entire circumferential direction inside the connection holes 16 and 17. The That is,housingA contact portion between the bottom surface 71a of the concave portion 71 of the lid 3 and the side surface 18a of the plate 18 facing the bottom surface 71a of the concave portion 71 extends along the axial direction from the inner side of the connection holes 16 and 17 by the outer peripheral surface of the liner ring 19. The plate 18 and the liner ring 19 are combined so as to be sealed at the surface.
[0043]
Between the contact portion between the bottom surface 71a of the recess 71 of the flange lid 3 and the side surface 18a of the plate 18 and the connection holes 16 and 17, the outer peripheral surface of the liner ring 19 and the inner peripheral surfaces of the connection holes 16 and 17 are provided. And the contact portion along the axial direction of the connection hole formed by the inner peripheral surface of the large-diameter portion 72b of the hole 72, the end surface of the opening end of the liner ring 19, and the step surface 72c of the hole 72 in the plate 18. The contact part along the connecting hole radial direction is formed.
[0044]
  The slurry pumping device configured as described above is pumped to a place where the slurry is placed by being incorporated in the slurry supply device at the building construction site. Discharge pipe attached to connecting pipe 624A pressure feed pipe (not shown) is connected to.
[0045]
  And as shown in FIG.,Slurry from the hopper 20 to the device body 1ofFill the interior space 11 to fill it. Two sets of piston-cylinder mechanisms 4, 5Driving piston-Driven by the cylinder mechanisms 21 and 22, the pistons 4b and 5b perform a suction operation and a discharge operation. When the pistons 4b and 5b are moved backward to perform the suction operation, the slurry charged in the internal space portion 11 becomes the holes 72 of the plate 18 and the housing lid 3.Connection holes 16, 17And is sucked into the cylinders 4a and 5a. In additionFIGS. 5 (a) and 5 (b) and FIGS. 6 (a) and 6 (b).S is a slurry.
[0046]
  The switching piston-cylinder mechanism 55 includes a piston 55bAre driven forward and backward to rotate the arm 54 in the range of the long hole 53 of the housing 2. The switching ring 51 provided in the bearing portion 12 of the housing 2 is reciprocated by the reciprocating rotation of the arm 54, and the drive liner 31 supported by the bearing portion 12 is reciprocated about the horizontal central axis O1-O1. Is done.
  One connection position A where the bent portion 6a of the connection pipe 6 rotates between the connection holes 16 and 17 of the housing lid 3 so as to face and connect to the connection hole 16 and the other connection position which faces and connects to the connection hole 17 Switch to B and displace.
  That is, the opening end of the bent portion 6a of the connection pipe 6 is switched and displaced to the connection hole to which the cylinder to which the piston is performing discharge operation is connected, and is opposedly connected to this connection hole. As a result, the slurry discharged from the cylinder 4a or 5a in which the piston 4b or 5b performs the discharging operation passes through the liner ring 19 provided in the connection holes 16 and 17 of the housing lid 3 and the hole 72 of the plate 18 to form the connection pipe 6. From the opening of one end of the pipe, it enters the inside and is pressure-fed. Then, it exits from the opening of the other end of the connecting pipe 6 and enters the pressure-feeding pipe connected to the discharge pipe 24 and is sent to the placement site through this pressure-feeding pipe. By performing such an operation alternately for each of the piston-cylinder mechanisms 4 and 5, the slurry can be continuously sent.
[0047]
  Now, as shown in FIGS. 5 (b) and 6 (a), the piston 4 b performs a discharge operation in the piston-cylinder mechanism 4, and the piston 5 b performs a suction operation in the piston-cylinder mechanism 5. Piston 55 of piston-cylinder mechanism 55 in switching drive mechanism 7bBy rotating the switching ring 51 via the arm 54, the connecting pipe 6 is rotated around the supported portion 6b, and the bent portion 6a is connected to the connecting hole 16 to which the cylinder 4a of the piston-cylinder mechanism 4 is connected. The connecting pipe 6 and the cylinder 4a are connected so as to face each other (one connection position A).
  In the piston-cylinder mechanism 4, the slurry sucked into the cylinder 4a is discharged from the discharge pipe 24 through the connecting pipe 6 from the cylinder 4a by the operation of the piston 4b. In the piston-cylinder mechanism 5, the slurry charged into the internal space 11 of the apparatus main body 1 by the operation of the piston 5b is sucked into the cylinder 5a.
[0048]
  In the hydraulic circuit 8,The pressure oil stored in the tank T by driving the pump P is passed through the oil hole 39 of the bearing portion 12 of the housing 2 and the housing 2 and the piston ring 37.AmongFeed into the gap 38. The gap 38 is formed by a piston ring 37.Small diameter part37b, step, and housing 2Large diameter part12a isFormed by combining,The entire circumference of the piston ring 37 in the circumferential direction is enclosed.
  That is, the housing2Is stationary, and the piston ring 37 is movable. When pressure oil is fed into the gap 38, the gap 38ofThe internal pressure oil acts on the step portion of the piston ring 37 and acts on the piston ring 37.AgainstA force directed to the internal space 11 of the apparatus main body 1 (housing 2) is applied. As a result, the piston ring 37ButAlong the axial direction toward the internal space 11MoveThen, the spline part 35 is pressed toward the internal space part 11 of the apparatus main body 1 (housing 2) through the thrust bearing 36. When the drive liner 31 moves toward the internal space 11 along the axial direction,The spline part 34 pushes the spline part 33 to move the supported part 6 b of the connection pipe 6 toward the internal space part 11 of the apparatus main body 1.
  ThereforeThe entire connecting pipe 6 faces the internal space 11 of the apparatus main body 1.MoveThe wear ring 23 provided at the open end of the bent portion 6aOn the plate 18 of the housing lid 3Strong contact with large pressure.
[0049]
When the piston-cylinder mechanism 4 finishes the discharge operation by the piston 4b and the piston-cylinder mechanism 5 finishes the suction operation, the piston-cylinder mechanism 55 in the switching drive mechanism 7 moves the switching ring 51 through the arm 54. The connecting pipe 6 is rotated to move to a position (the other connecting position B) facing the connecting hole 17 to which the cylinder 5a of the piston-cylinder mechanism 5 is connected, and the connecting pipe 6 and the cylinder 5a Communicate.
[0050]
  And the bending part 6a of the connecting pipe 6 isThe otherAfter being located at the connection position B, as shown in FIG.,In the piston-cylinder mechanism 5, the slurry sucked into the cylinder 5 a is discharged from the discharge pipe 24 through the connection pipe 6 from the cylinder 5 a by the operation of the piston 5 b, and in the piston-cylinder mechanism 4, the inside of the apparatus main body 1 is operated by the operation of the piston 4 b. Slurry charged into the space 11 is cylinder4aAspirate inside.
[0051]
  In this slurry pressure feeding device, the contact portion between the bottom surface 71a of the recess 71 and the side surface 18a of the plate 18 in the housing lid 3 is in the direction of the connecting hole center axis along the entire circumferential direction by the outer peripheral surface of the liner ring 19 inside the connecting hole 16. Blocked along. That is, the contact portion between the bottom surface 71 a of the recess 71 of the housing lid 3 and the side surface 18 a of the plate 18 is moved from the inside of the connection hole 16 by the plate 18 and the liner ring 19.Connection holeAlong the axial directionThe outer circumference of the liner ringThe surface is securely sealed. For this reason, when the slurry discharged from the cylinders 4a and 5a passes through the liner ring 19 and the hole 72 of the plate 18 and is pumped to the connection pipe 6, the slurry is in contact with the bottom surface 71a of the recess 71 of the housing lid 3 and the recess 71. Intrusion into the contact portion with the side surface 18a of the plate 18 facing the bottom surface 71a can be reliably prevented.
[0052]
  In particular,housingBetween the contact portion between the bottom surface 71 a of the recess 71 of the lid 3 and the side surface 18 a of the plate 18 facing the bottom surface 71 a of the recess 71 and the connection holes 16, 17, the outer peripheral surface of the liner ring 19 and the connection hole 16, 17 and the inner peripheral surface of the large-diameter portion 72 b of the hole 72, the contact portion along the axial direction of the connection hole, the end surface of the opening of the liner ring 19, and the step surface 72 c of the hole 72 in the plate 18. And the contact part along the connecting hole radial direction formed by the cylinders 4a and 5a is located.
  Therefore, a path that is longer and more complicated than that of the conventional case is formed between the contact portion between the bottom surface 71 a of the recess 71 and the side surface 18 a of the plate 18 and the inside of the connection hole 16. For this reason, a gap is generated in the contact portion along the connecting hole radial direction formed by the end face of the opening end of the liner ring 19 and the stepped surface 72c of the hole 72 in the plate 18 depending on the relationship between the processing dimensions and assembly dimensions of the parts. Even if the slurry enters, the pressure loss of the slurry increases.
  Therefore, the slurry ishousingIntrusion into the contact portion between the bottom surface 71a of the recess 71 of the lid 3 and the side surface 18a of the plate 18 facing the bottom surface 71a of the recess 71 can be reliably prevented.
[0053]
  ThishousingThe contact portion between the bottom surface 71a of the concave portion 71 of the lid 3 and the side surface 18a of the plate 18 is worn by the slurry to form a void, and further, the void grows and other adjacent adjacent connection holes 16 from which the slurry is pumped. The slurry can be stably pumped by preventing the occurrence of a situation in which the connection holes 17 are communicated with each other.
[0054]
  In addition, the large-diameter portion 72 of the hole 72bAnd small diameter part 72aSince the seal ring 73 that is in contact with the end surface of the liner ring 19 is fitted and disposed at an angle at which the step surface 72c that is the boundary between the seal ring 73 and the step surface 72c intersects, the sealing performance can be further improved.
[0055]
  The combination of the plate and the liner ring in the slurry pumping device of the present invention is,The present invention is not limited to the embodiment described above. FIG. 8 is a view showing a combination of a plate and a liner ring in another embodiment, and the same parts as those in FIG. 7 are given the same reference numerals.
  In the assembly shown in FIG. 8, the length of the liner ring 19 is longer than that shown in FIG.Plate 18A flange portion 74 that extends slightly toward the side and extends outward is formed at the open end. On the plate 18,A concave portion 75 is formed in the side surface portion on the housing side, and the liner ring 18 is provided in the concave portion 75.Flange part74 is fitted and arranged. In addition,Flange part74 is fixed to the plate 18 by bolts 76.
[0056]
  Figure 9Considered as a reference example, not as an embodiment of the present inventionIt is a figure which shows the combination of the plate and liner ring in a form, and attaches | subjects and shows the same part as FIG. In the assembly shown in FIG. 9, the plate 18 and the liner ring 19 are integrally formed.
[0057]
Figure 8Even in the configuration shown, the same effect as that of the embodiment shown in FIG. 7 can be obtained.
[0058]
In addition, this invention is not limited to embodiment mentioned above, It can implement by changing variously. The slurry pumping device of the present invention can be used not only for the purpose of pumping concrete and tunnel excavated soil, but also for pumping soil dredged when dredging the sea or river.
[0059]
  According to the present invention described in detail above, the contact portion between the bottom surface of the concave portion of the apparatus main body and the side surface of the plate main body is formed from the inside of the connection hole by the plate and the liner ring.Connection holeAlong the axial directionThe outer circumference of the liner ringSince the surface is securely sealed, it is possible to reliably prevent the slurry from entering the contact portion between the bottom surface of the recess of the apparatus main body and the side surface of the plate when the slurry discharged from the cylinder is pumped.
[0060]
In particular, between the contact portion between the bottom surface of the concave portion of the apparatus main body and the side surface of the plate and the inside of the connection hole, the outer peripheral surface and the end surface of the liner ring and the other members are longer and more complicated than before. Since a bent path is formed, slurry enters the contact portion along the connecting hole radial direction formed by the end surface of the opening end of the liner ring and the other member due to the relationship between the processing dimensions and assembly dimensions of the parts. Even so, it is possible to reliably prevent the pressure loss of the slurry from entering the contact portion between the bottom surface of the concave portion of the apparatus main body and the side surface of the plate.
[0061]
As a result, the contact portion between the bottom surface of the concave portion of the apparatus main body and the side surface of the plate is worn by the slurry to form a void, and further, the void grows and from the connection hole to which the slurry is pumped to another adjacent connection hole. It is possible to prevent the connection holes from communicating with each other and to stably feed the slurry.
[0062]
  According to the invention of claim 2, since the liner ring is inserted from the connection hole to the hole of the plate, the invention of claim 1 can be provided with an effective concrete configuration.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a slurry pumping apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a slurry pumping device in the same embodiment.
FIG. 3 is a cross-sectional view showing a slurry pumping device in the same embodiment.
FIG. 4 is a cross-sectional view showing a slurry pumping device in the same embodiment.
FIG. 5 is a view showing the operation of the slurry pumping device in the same embodiment.
FIG. 6 is a view showing the operation of the slurry pumping apparatus in the same embodiment.
FIG. 7 shows a slurry pumping apparatus according to the embodiment.Liner ring and plate combinationFIG.
FIG. 8 shows a slurry pumping device according to another embodiment.Liner ring and plate combinationFIG.
FIG. 9Considered as a reference exampleSectional drawing which shows the combination of the liner ring and plate in the slurry pressure feeder of a form.
FIG. 10 shows a conventional slurry pumping device.Liner ring and plate combinationFIG.
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 1 ... Apparatus main body, 3 ... Wall part (housing lid), 4, 5 ... Piston-cylinder mechanism, 4a, 5a ... Cylinder, 4b, 5b ... Piston, 6 ... Connection pipe, 11 ... Internal space part, 16, 17 ... Connection hole, 18 ... plate, 18a ... side face, 19 ... liner ring, 71 ... recess, 71a ... bottom face, 72 ... hole, S ... slurry.

Claims (2)

An apparatus main body having an internal space portion to which slurry is supplied and a wall portion in which a plurality of connection holes opening in the internal space portion are formed;
A plurality of cylinders arranged outside the apparatus main body and respectively connected to the connection holes, a suction operation for sucking slurry supplied to the internal space of the apparatus main body into the cylinder, and the sucked slurry A plurality of piston-cylinder mechanisms having a plurality of pistons that alternately perform a discharge operation of discharging from the cylinder;
It is arranged inside the apparatus main body, is connected to the connection hole, and can be alternately switched to a plurality of connection positions for receiving the slurry discharged from the cylinder of the piston-cylinder mechanism, and in the pressure direction of the slurry. A connecting pipe supported by the apparatus main body with the wear ring at the upstream opening end along the wall facing the inner surface of the wall,
A concave portion surrounding the connection hole is formed on the inner surface of the wall portion of the apparatus main body, and a plate that has a hole facing the connection hole and contacts the wear ring is fitted into the concave portion, and the connection hole A liner ring separate from the plate is inserted inside the
The plate and the liner ring block the contact portion between the bottom surface of the recess and the side surface of the plate facing the bottom surface of the recess from the inner side of the connection hole with the outer peripheral surface of the liner ring along the axial direction of the connection hole. A slurry pumping device characterized by being combined so that The slurry pressure feeding device according to claim 1, wherein the liner ring is inserted from the connection hole to the hole of the plate .

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