CN2286802Y - High-efficiency impact-proof concrete pump - Google Patents

Abstract

The utility model relates to a high-efficiency impact-proof concrete pump, which an improvement on a concrete pump. The utility model is characterized in that an inclined concrete cylinder is arranged and a material feeding stirring device is arranged; the transmission of a piston of the concrete cylinder uses a planar contact pair and has a structure for conveniently disassembling and assembling the piston of the concrete cylinder. A back point mechanical limiting device is arranged during the operation of the piston of the concrete cylinder. The utility model has the advantages of higher suction efficiency and convenient and quick replacement; the piston of the concrete cylinder is difficult to wear and damage, and the problem that the hydraulic shock is generated by reversing can be solved.

Description

Efficient protecting against shock concrete pump

The utility model is to create about the innovation of concrete pump, belongs to engineering machinery, belongs to international classifiation F04B class.

At present the groundwork device and the structural principle thereof of the most horizontal single action biserial of domestic and international application output of hydraulic piston concrete (shown in Figure 1) are: two parallel and oil cylinders 1 level are fixed on water tank 5 left sides, installed on the right side of water tank 5 two concrete cylinders 6 and with oil cylinder 1 coaxial arrangement, the right-hand member of piston rod 4 is equipped with coupling 7 and concrete cylinder piston 8, the right-hand member of concrete cylinder 6 is fixed on the hopper 9, the distributing valve 10 that can swing is arranged in the hopper 9, the right-hand member of distributing valve 10 is communicated with delivery pipe 12 all the time, in hopper 9, also has stirring shaft 11, the oil circuit of two oil cylinders 1 makes the action of its piston rod 4 anti-phase synchronously for series connection.When concrete cylinder piston 8 left lateral, distributing valve 10 makes concrete cylinder 6 be communicated with hopper 9, at this moment the concrete in the hopper 9 is inhaled into concrete cylinder 6, when concrete cylinder piston 8 left lateral behind limit position, distributing valve 10 is swung fast, and its left end overlaps with concrete cylinder 6, and concrete cylinder 6 is communicated with delivery pipe 12, concrete cylinder piston 8 right laterals then, the concrete in the concrete cylinder 6 are pushed into delivery pipe 12 by distributing valve 10.It is by concrete cylinder piston 8 left lateral the concrete cylinder 6 interior negative pressure that produce to be aspirated that concrete enters concrete cylinder 6, and this is identical with the principle of liquid medicine suction needle tubing with the doctor.This suction mode is suitable for for the medium of good fluidity, but concrete is a kind of flowability and bad and uneven medium, and make concrete cylinder 6 be filled concrete is the comparison difficulty.Such phenomenon often takes place in engineering practice: when concrete slump hour because mobile less, concrete cylinder 6 is often inhaled discontented concrete and some air of inspiration, makes to cause gas to block up in the delivery pipe 12 and influence normal pumping; When concrete slump was big, suction often sucked concrete cylinder 6 earlier with the slush in the concrete, and stone enters concrete cylinder 6 after under the drive of slush, and concrete forms segregation in delivery pipe 12 like this, and pumping resistance is increased, and caused plugging.This in addition uneven suction also causes the stone in the hopper 9 surplus more many more and can't uninterrupted pumping easily.Existing in a word various concrete pumps will make concrete cylinder 6 be filled concrete and be difficult to accomplish, this GB GB/T13333-91 " concrete pump " is stipulated in technical requirements 5,2,3: " suction efficiency must not be lower than 85% " also can find out thus suction efficiency not too high be the common fault that present various concrete pump exists.

It is the easy eccentric wear damage of seal ring of concrete cylinder piston 8 that also there is another problem in available coagulation soil pump.This is because concrete cylinder 6 is to carry out rigid joint by water tank 5 with oil cylinder 1, exercise group component one concrete cylinder piston 8 wherein is to carry out rigid joint by coupling 7 with oil cylinder piston 2 and piston rod 4, it has three constraint conditios radially when motion, wherein two from oil cylinder 1, one from concrete cylinder 6, the movement travel of above-mentioned in addition exercise group component is very big again, generally all surpass one meter, therefore it has proposed very high requirement to processing and assembly precision, slightly nearly will produce bigger non-axial force, operation will hair fastener.In fact existing various concrete pumps all are the possibility of keeping relative movement by the inhomogeneous deformation of elastic element one seal ring of oil cylinder piston 2, end cap 3 and concrete cylinder piston 8, but the contact of the seal ring of concrete cylinder piston 8 is cement and sandstone, the consequence of above-mentioned inhomogeneous deformation is exactly uneven wearing and tearing, and promptly so-called eccentric wear damages problem.Owing to rigid joint, the replacing of concrete cylinder piston 8 can not be accomplished convenient and swift in addition, and it is careful that operation also needs, and does not do a good job in also can head into concrete cylinder 6 to concrete cylinder piston 8 and be difficult to take out, and this continuity for pump concrete requires to be far from suitable.

The impact that commutation produced hydraulic system when available coagulation soil pump can't be resisted high-rise pumping in addition.This is because pumping pressure is bigger during high-rise pumping, in commutation in a flash, concrete in the distributing valve 10 is communicated with hopper 9, pressure drops to zero suddenly, at this moment the concrete in the delivery pipe 12 will produce refluence, and after distributing valve 10 puts in place, the concrete of refluence will impact concrete cylinder piston 8, and impact force passed to oil cylinder 1, cause that oil pressure sharply rises to form hydraulic shock and damage hydraulic element.

In view of all the shortcoming that above-mentioned prior art exists, the purpose of this utility model is that a kind of new concrete pump of design makes it to have higher suction efficiency, concrete cylinder piston is not easy eccentric wear and damages and change the advantages such as harmful effect of hydraulic shock convenient, that produce when overcoming commutation to hydraulic system.

Structure operating principle of the present utility model and characteristics, conjunction with figs. is described in detail below:

Fig. 1 is the structure of the groundwork device of available coagulation soil pump.

Fig. 2 is the improvement project that the utility model proposes at the not high problem of former concrete pump suction efficiency.

Fig. 3 is the improvement project of the utility model at the easy eccentric wear damage of the concrete cylinder piston of former concrete pump, the hydraulic shock problem proposition of generation when changing inconvenient and commutation.

Fig. 4 is the A-A sectional view shown in Fig. 3.

Fig. 5 is the B-B sectional view shown in Fig. 3.

Fig. 6 is the C-C sectional view shown in Fig. 4.

The utility model proposes following improvement project (see figure 2) at the not high problem of former concrete pump suction efficiency:

One of its measure is: make concrete cylinder 6 be arranged to change into by common substantially horizontal together with oil cylinder 1, water tank 5 and be in tilted layout, the advancing of concrete cylinder 6, discharge gate are upwards, concrete singly is not to be subjected to suction force when entering concrete cylinder 6 like this, and the sliding force that also has the concrete deadweight to form, concrete enters concrete cylinder 6 just than being easier under the acting in conjunction of the two.

Two of its measure is: cancelled the stirring shaft 11 of the substantially horizontal layout that is arranged at usually in the hopper 9, set up the feeding stirring apparatus above hopper 9.Its structural principle is as follows: frame 18 is installed in the top of hopper 9, it can 17 rotate around the shaft, in the bottom of frame 18 transmission device 22 is arranged, chute 20 is arranged at top, the roller 19 of charging bar 21 upper ends is limited in motion in the chute 20, the torque that is produced by transmission device 22 drives hinged with it charging bar 21 by eccentric shaft 23 and makes compound motion, and its forms of motion is similar with the oar of drawing dragon-boat, and the motion by charging bar 21 drives the kinetic energy of the concrete generation of hopper 9 bottoms towards concrete cylinder 6.Be hinged with the bottom of the hinged connecting rod 15 of the arm of force 16 and the rocking arm 14 on the distributing valve transmission shaft 13 in addition, make the frame 18 can 17 swings synchronously around the shaft with the swing of distributing valve 10.Its effect is to make charging bar 21 and distributing valve 10 not produce interference.On frame 18, eccentric shaft 23, charging bar 21 and chute 20 all are two covers, arrange in rotating shaft 17 bilateral symmetry where two charging bars 21 are put regardless of distributing valve so respectively in the both sides of distributing valve 10, always there is a charging bar to aim at the material feeding mouth feeding, make the stone that is deposited in feed hopper bottom easily under the drive of charging bar, constantly be admitted to the concrete cylinder, make the concrete that enters the concrete cylinder keep uniform state, thereby guarantee that pumping can successfully go on.Because driving mechanism and all kinematic pair of feeding stirring apparatus directly do not contact with concrete, therefore the concrete that splashes when its front also has baffle plate 24 to block charging just has higher operational reliability compared with original stirring system in addition.

The hydraulic shock problem that the utility model produces when damaging, changing inconvenient and commutation at the easy eccentric wear of the concrete cylinder piston of former concrete pump proposes following improvement project:

As shown in Figure 3: 5 is water tank, 4 is piston rod, its front end be hollow opening and also have screw thread to link to each other with flange 7-2, mandrel 7-3 passes the endoporus of flange 7-2, its left end has nut 7-1, be set with at the middle part of mandrel 7-3 and be convenient to one side of something pipe 7-4 that peace is fast torn open, two half block has hinge 7-7 to link to each other, fix with latch 7-5 when closing up, concrete cylinder piston 8 is arranged in concrete cylinder 6, shown position is the limit position that concrete cylinder piston 8 retreats under piston rod 4 drives, big outer little blind hole has T type groove and is furnished with corresponding T type block 8-1 in its side in the left end of concrete cylinder piston 8 has, and the two passes through block latch 8-2 and is fixed, the major part of mandrel 7-3 right-hand member is limited in the blind hole of concrete cylinder piston 8 axial clearance X2 and radial clearance 2X3 being arranged between the two.

When piston rod 4 right laterals, its thrust promotes mandrel 7-3 right lateral by flange 7-2, half of pipe 7-4, and along with gap X2 progressively is reduced to zero, concrete cylinder piston 8 also is pushed right lateral; When piston rod 4 left lateral, its pulling force is by flange 7-2, nut 7-1, mandrel 7-3 pulling concrete cylinder piston 8 left lateral.Because the existence of X2 and X3, transmission between mandrel 74 and the concrete cylinder piston 8 is actually the pair of planar pair, it can only transmit useful axial force, for the non-axial force that usually causes because of processing and assembly error, owing to planar pair flat pair can slide relative be eliminated this non-axial force, therefore the seal ring of concrete cylinder piston can not produce inhomogeneous deformation, just can not produce eccentric wear yet and damage.

In the design; the replacing method of concrete cylinder piston 8 is as follows: shut down during to limit position at piston rod 4 left lateral; pulling latch 7-5 just can separate and take off half of pipe 7-4; start makes piston rod 4 right laterals then; in the endoporus of mandrel 7-3 this moment with indentation flange 7-2; the angle latch 7-6 that is installed in subsequently on the flange 7-2 will stretch in the annular groove that snaps in mandrel 7-3 under the effect of spring; make piston rod 4 left lateral this moment; angle latch 7-6 will drive mandrel 7-3 and concrete cylinder piston 8 will be pulled out concrete cylinder 6 and enter water tank 5; shut down this moment; at this moment spur block latch 8-2, take out T shape block 8-1, just can take out concrete cylinder piston 8 subsequently along the opposite direction of T type groove along T-slot.The installation method of concrete cylinder piston 8 is as follows: along T type groove concrete cylinder piston 8 is enclosed within on the major part of mandrel 7-3; holding block latch 8-2 subsequently is in place T type block 8-1; then angle latch 7-6 Rotate 180 degree is made its inclined-plane left; start makes concrete cylinder piston 8 slowly enter concrete cylinder 6 then; after treating that flange 7-2 also all enters concrete cylinder 6, make piston rod 4 left lateral, shut down during to limit position; load onto half of pipe 7-4 and insert good latch 7-5, so far install and finish.The above-mentioned process that dismounts and mounts is fast more convenient and do not need any instrument, and this requires for the continuity of guaranteeing pumping is very favorable.

The utility model has designed dead point, concrete cylinder piston operation back mechanical stop limiter for solving the impact that hydraulic system is produced that commutates.See Fig. 3.Here it is is installed in plate 25 in the water tank 5, it is characterized in that: when the idling lotus made concrete cylinder piston 8 retreat into limit position, end face arrived the distance X 2 of mandrel 7-3 major part axle head at the bottom of less than the blind hole hole of concrete cylinder piston 8 to the distance X 1 of plate 25 thereafter.Its principle is as follows: shown position is concrete cylinder piston 8 flashy position before the commutation beginning, finish in a flash in commutation, the concrete that flows backwards will promote concrete cylinder piston 8 left lateral, gap X1, X2 will reduce rapidly this moment, but because X1 is less than X2, concrete cylinder piston 8 can only be passed to impact force plate 25 and pass to water tank 5, and can not pass to hydraulic system, and therefore commutation is solved the shock problem that hydraulic system produces.

The utility model modern design, simple and reliable for structure, good manufacturability, be convenient to manufacture, the easy-to-operat maintenance, accepted by manufacturer and user easily.

Claims (5)

1. efficient protecting against shock concrete pump, its equipment is made up of oil cylinder, water tank, concrete cylinder, hopper, distributing valve, stirring mechanism etc., it is characterized in that the concrete cylinder with respect to the horizontal plane is that the transmission of tilting, feeding stirring apparatus, concrete cylinder piston are arranged is adopted planar pair flat pair, has the fast assembling-disassembling of being convenient to concrete cylinder structure of piston, had dead point, concrete cylinder piston operation back mechanical stop limiter.

2. efficient protecting against shock concrete pump according to claim 1, wherein said feeding stirring apparatus is positioned at the top of hopper, and its frame can rotate around the axis.Transmission device is arranged at the bottom in frame, top has the roller of chute charging bar upper end to be limited in moving in the chute, the torque that produces by transmission device by eccentric shaft drive its middle part with it the charging bar of hinge knot make compound motion, its forms of motion is similar to the slurry of drawing dragon-boat, be hinged with the bottom of the hinged connecting rod of the arm of force and the stern that shakes on the distributing valve transmission shaft in addition, make the frame can swing synchronously around the shaft with the swing of distributing valve.

3. efficient protecting against shock coagulation pump according to claim 1, the transmission of wherein said concrete cylinder piston adopt planar pair flat pair to be meant that the part of promotion concrete cylinder piston and the surface of contact of concrete cylinder piston are plane and the leeway that the side direction relative movement is arranged.

4. efficient protecting against shock concrete pump according to claim 1, the wherein said fast assembling-disassembling concrete cylinder structure of piston of being convenient to is meant that the front end of piston rod is hollow opening, and there is screw thread to link to each other with flange, mandrel passes the endoporus of flange, its left end has nut, be set with at the middle part of mandrel and be convenient to one side of something pipe that peace is fast torn open, half of pipe is to be two by a cylindrical shell along the shaft axis subdivision, two half block has hinge to link to each other, fix with latch when closing up, in the left end of concrete cylinder piston has big outside little blind hole, have T type groove in its side, and is furnished with corresponding T type block, the two is fixed by the block latch, and the major part of mandrel right-hand member is limited in the blind hole of concrete cylinder piston, and axial clearance and radial clearance greater than one millimeter are arranged between the two, in the side of flange the angle latch is installed, the angle latch can be stretched in the annular groove that snaps in mandrel when mandrel indentation flange endoporus.

5. efficient protecting against shock concrete pump according to claim 1, the dead point mechanical stop limiter is meant the plate that is arranged in the water tank behind the wherein said concrete cylinder piston, it is characterized in that: plate arrives the distance of mandrel major part axle head at the bottom of less than concrete cylinder piston blind hole hole to the distance of concrete cylinder piston when the idling lotus makes concrete cylinder piston retreat into limit position

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