CN211692789U - Concrete piston and concrete conveying device - Google Patents
Concrete piston and concrete conveying device Download PDFInfo
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- CN211692789U CN211692789U CN201922426907.5U CN201922426907U CN211692789U CN 211692789 U CN211692789 U CN 211692789U CN 201922426907 U CN201922426907 U CN 201922426907U CN 211692789 U CN211692789 U CN 211692789U
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Abstract
The present disclosure relates to a concrete piston and a concrete conveying device. The concrete piston comprises a piston body, a sealing body and a resistance element, wherein the sealing body is sleeved on the piston body, the resistance element is preset in the sealing body so as to be worn along with the sealing body in the wearing process of the sealing body, and the resistance element is provided with a first end and a second end which are used for being connected with an electric signal detector. Because the resistance element is preset in the sealing body, after the sealing body is abraded for a preset amount, the resistance element is exposed and continuously abraded, so that the volume of the resistance element is changed, and the resistance of the resistance element is correspondingly changed. By determining the wear of the resistance element in this manner, the wear of the sealing body can be determined.
Description
Technical Field
The disclosure relates to the field of engineering machinery, in particular to a concrete piston and a concrete conveying device.
Background
In the concrete pump, the concrete piston moves in the conveying cylinder to push the concrete to the construction site, the front end of the concrete piston faces the concrete, the rear end of the concrete piston faces the water, and the sealing performance of the concrete piston is high. The concrete piston (mainly the sealing body of the concrete piston) is seriously abraded due to the complex and severe working conditions of the concrete piston. However, there is no monitoring means for the service condition and service life of the concrete piston in the industry so far. The method is simple and rough, the abrasion of the concrete piston (sealing body) cannot be quantified, and no standard exists, so that sometimes the concrete piston is replaced in advance before the maximum abrasion loss of the concrete piston is not reached, the waste of the use resources of the concrete piston is caused, and the use cost is increased.
SUMMERY OF THE UTILITY MODEL
The purpose of the disclosure is to provide a concrete piston and a concrete conveying device, in the concrete piston, the abrasion condition of the concrete piston (sealing body of the piston) can be judged accurately and timely.
In order to achieve the above object, the present disclosure provides a concrete piston, including a piston body, a sealing body, and a resistance element, where the sealing body is sleeved on the piston body, the resistance element is preset in the sealing body so as to be worn along with the sealing body in a wearing process of the sealing body, and the resistance element has a first end and a second end for connecting with an electrical signal detector.
Optionally, the resistance element is a notched annular resistance wire, and the annular resistance wire is arranged around a central axis of the sealing body.
Optionally, the number of the resistance elements is plural, and the plural resistance elements are arranged at intervals in a radial direction and an axial direction of the sealing body.
Optionally, a plurality of said resistive elements are connected in parallel.
Optionally, the plurality of resistance elements include a first resistance element, a second resistance element, and a third resistance element, which are all circular, the first resistance element, the second resistance element, and the third resistance element respectively have a first end and a second end opposite to each other, the concrete piston further includes a first common segment and a second common segment, which are electrically connected to the electrical signal detector, the first common segment is respectively connected to the first end of the first resistance element, the first end of the second resistance element, and the first end of the third resistance element, and the second common segment is respectively connected to the second end of the first resistance element, the second end of the second resistance element, and the second end of the third resistance element.
Optionally, the piston body comprises a piston sleeve, a crimping piece and a connecting piece, wherein the crimping piece is installed on the connecting piece and can crimp the piston sleeve and the sealing body on the connecting piece, and the connecting piece is used for being connected with the piston rod.
Optionally, the crimping piece includes cylindricality portion and forms the clamp plate of cylindricality portion one end, the connecting piece includes the connecting rod and forms the ring flange of connecting rod one end, cylindricality portion detachably install in the ring flange, the piston bush with the seal cover is established on cylindricality portion, and is compressed tightly the ring flange with between the clamp plate, the tip of seal with the clamp plate contact, the connecting rod is used for linking to each other with the piston rod.
According to another aspect of the present disclosure, a concrete conveying device is provided, which includes an electrical signal detector, a conveying cylinder and the concrete piston, wherein a piston rod is disposed in the conveying cylinder, the piston rod is connected to the concrete piston, an outer peripheral wall of a sealing body of the concrete piston is connected to an inner wall of the conveying cylinder in a sealing manner, and the electrical signal detector is electrically connected to the resistance element to detect a wear condition of the resistance element.
Optionally, the electrical signal detector is an ohmmeter.
Optionally, the concrete conveying device further comprises a hopper, an S-pipe assembly arranged in the hopper, and a master cylinder, wherein the conveying cylinder comprises a first conveying cylinder and a second conveying cylinder, the master cylinder comprises a first master cylinder and a second master cylinder, the piston rod comprises a first piston rod and a second piston rod, one end of the first piston rod is connected in the first conveying cylinder through the concrete piston, the other end of the first piston rod is connected in the first master cylinder through the cylinder piston, one end of the second piston rod is connected in the second conveying cylinder through another concrete piston, and the other end of the second piston rod is connected in the second master cylinder through the cylinder piston,
the first delivery cylinder is selectively in communication with the hopper and the S-tube assembly and the other of the hopper and the S-tube assembly.
In the concrete piston provided by the disclosure, the resistor element is preset in the sealing body, and after the sealing body is abraded for a preset amount, the resistor element is exposed and continuously abraded, so that the volume of the resistor element is changed, and the resistance of the resistor element is correspondingly changed. By determining the wear of the resistance element in this manner, the wear of the sealing body can be determined. The way of judging the resistance change of the resistance element is relatively easy and accurate. For example, ohmmeters are used to connect the first and second terminals of the resistive element, respectively. In this way, by comparing the detection value of the current ohmmeter with the resistance value of the resistance element in the initial state, the wear of the resistance element can be determined, and the wear of the sealing body can be determined.
This application adopts the scheme that the resistance change of judging resistance element goes to judge the wearing and tearing condition of seal, has following advantage at least:
firstly, the detection is intelligent, and the detection is more accurate.
Secondly, it is convenient to detect, practices thrift check-out time, and is difficult for causing the damage to the seal.
And thirdly, the loss caused by untimely replacement of the concrete piston due to abrasion of the concrete piston is reduced.
Fourthly, the use cost is reduced. The service life of the sealing body can be prolonged to the maximum, and the situation that the sealing body is wasted due to the fact that the sealing body is replaced in advance is avoided.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic cross-sectional view of a concrete piston according to an embodiment of the present disclosure;
FIG. 2 is an enlarged view of the structure of portion A in FIG. 1;
FIG. 3 is a schematic view illustrating a resistance detecting operation of a resistance element of a concrete piston according to an embodiment of the present disclosure
FIG. 4 is an enlarged schematic view of the structure of part B in FIG. 3;
FIG. 5 is a schematic view of a resistance sensing operation performed on a resistance element of a concrete piston according to an embodiment of the present disclosure, wherein the sealing body is hidden for clarity;
fig. 6 is a schematic cross-sectional structural view of a concrete conveying apparatus according to an embodiment of the present disclosure.
Description of the reference numerals
10-a concrete piston; 11-a seal; 12-a resistive element; 121-a first resistive element; 122-a second resistive element; 123-a third resistive element; 13-a first common segment; 14-a second common segment; 15-a piston sleeve; 16-a crimp; 161-a cylindrical portion; 162-a platen; 17-a connector; 171-a connecting rod; 172-flange plate; 18-an elastic support ring; 19-a fastening screw; 20-wire guides; 21-a first wire guide; 22-a second wire guide; 23-a third wire guide; 30-an electrical signal detector; 31 — a first lead; 32-a second lead; 40-a conveying cylinder; 41-a first delivery cylinder; 42-a second delivery cylinder; 51-a first piston rod; 52-a second piston rod; 60-a hopper; 70-S tube assembly; 71-a discharge hole; 81-a first master cylinder; 82-a second master cylinder; 90-a water tank; 100-a concrete conveying device; 110-a pipe clamp; 200-concrete; p-wearing parts.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise stated, the terms of orientation such as "front and rear" are used to define the extending direction of the transfer cylinder 40 of the concrete transfer apparatus 100, and the direction toward the hopper 60 along the extending direction of the transfer cylinder 40 is front and the direction away from the hopper 60 is rear. The term "inner and outer" refers to the inner and outer parts of the relevant component. In addition, the terms "first", "second", and the like used in the embodiments of the present disclosure are for distinguishing one element from another, and have no order or importance.
As shown in fig. 1 to 6, the present disclosure provides a concrete piston 10 and a concrete conveying device 100 having the concrete piston 10, the concrete piston 10 includes a piston body, a sealing body 11, and a resistance element 12, the sealing body 11 is sleeved on the piston body, the resistance element 12 is preset in the sealing body 11, so that the resistance element 12 is worn along with the sealing body 11 in a wearing process of the sealing body 11.
In the concrete piston 10 provided by the present disclosure, by presetting the resistance element 12 in the sealing body 11, for example, at a position which is easy to wear, after the sealing body 11 is worn by a preset amount, the resistance element 12 is exposed and continues to be worn, so that the volume of the resistance element 12 changes, and the resistance thereof changes correspondingly. By determining the wear of the resistance element 12 in this manner, the wear of the sealing body 11 can be determined. The manner of determining the resistance change of the resistance element 12 is relatively easy and accurate. For example, an ohmmeter is used to connect the first terminal and the second terminal of the resistance element 12, respectively, so that the wear of the resistance element 12 and thus the seal body 11 can be determined by comparing the detection value of the ohmmeter with the resistance value of the resistance element 12 in the initial state.
Compared with the scheme of withdrawing the concrete piston 10 into the water tank and adopting visual inspection or hand feeling detection in the prior art, the scheme of judging the resistance change of the resistance element 12 to judge the abrasion condition of the sealing body 11 at least has the following advantages:
firstly, the detection is intelligent, and the detection is more accurate. The ohmmeter is used for detecting the resistance, and the abrasion condition of the concrete piston 10 (the sealing body 11) can be judged by measuring the size of the resistance, so that the abrasion condition of the sealing body 11 is relatively more accurately detected.
Secondly, it is convenient to detect, practices thrift check-out time, and is difficult for causing the damage to seal 11. The service condition of the sealing body 11 can be detected by stopping the concrete piston 10 at a normal pumping position without withdrawing the concrete piston 10 into the water tank even if the concrete is waiting for a certain time, and the detection time is shortened. In addition, the concrete piston 10 does not need to be withdrawn into the water tank during detection, so that the scratch to the concrete sealing body 11 caused by frequent withdrawal of the concrete piston 10 is avoided.
Thirdly, the loss caused by the concrete piston 10 being worn and the concrete piston 10 not being replaced in time is reduced, for example, the pulling damage and the serious abrasion of the conveying cylinder are avoided, and the abrasion of the concrete piston 10 is accelerated; avoid because of the seal 11 damages, concrete thick liquid flows into the water tank, and the concrete segregation arouses the pump sending to block up the pipe, causes pipeline loss, concrete to scrap.
Fourthly, the use cost is reduced. The service life of the sealing body 11 can be prolonged to the maximum, and the situation that the sealing body 11 is wasted due to the fact that the sealing body 11 is replaced in advance is avoided.
In the present disclosure, in addition to directly measuring the resistance value of the resistance element 12 by using an ohmmeter, a voltmeter or an ammeter may be used to detect the current or voltage of an electric element disposed outside the sealing body 11 and connected in series with the resistance element 12, thereby indirectly determining the wear of the resistance element 12. When the resistance of the resistance element 12 changes under the condition that other conditions are not changed, the current passing through the electricity utilization element changes correspondingly, so that the abrasion condition of the resistance element 12 can be indirectly judged according to the change, and the abrasion condition of the sealing body 11 can be judged.
In the present disclosure, the resistance element 12 may be provided in advance in the sealing body 11 by any suitable process, and for example, the resistance element 12 may be integrally molded in the sealing body 11 at the time of production of the sealing body 11.
Generally, the sealing body 11 of the concrete piston 10 is an elastic member made of a non-metal member and used for being in sealing contact with the inner wall of the conveying cylinder, and in order to ensure the sealing of the conveying cylinder 40 and the concrete piston 10, the diameter of the sealing body 11 is larger than that of the conveying cylinder, for example, the former may be 1.03 to 1.04 times of the latter.
In the present disclosure, the resistive element 12 may have any suitable shape. Since the sealing body 11 is generally annular, in one embodiment of the present disclosure, the resistance element 12 is a notched annular resistance wire that is disposed around the central axis of the sealing body 11, as shown in fig. 5. Therefore, in the abrasion rule of the sealing body 11, the abrasion of all parts along the resistance element 12 is uniform, and the accuracy of abrasion detection of the sealing body 11 is improved. Typically, the delivery cylinder for concrete is circular in cross-section, and therefore, optionally, the resistive element 12 corresponds to a notched circular resistance wire.
In the present disclosure, the number of the resistance elements 12 is not limited, and may be one or more. When the resistance element 12 is, for example, a single circular resistance wire with an opening is arranged in the sealing body 11, the change of the diameter of the resistance wire is calculated according to the resistance change of the resistance wire, and thus the abrasion allowance of the sealing body 11 is obtained.
As shown in fig. 2, 4 and 5, in one embodiment of the present disclosure, the resistance element 12 includes a plurality of annular resistance wires, and the plurality of resistance elements 12 are provided at intervals in the radial direction and the axial direction of the sealing body 11, that is, the plurality of annular resistance wires are tapered in the axial direction of the sealing body 11. Thus, as shown in fig. 6, when the concrete piston 10 is disposed in the cylinder 40, the large end of the cone is advanced and the small end is advanced.
The portion of the concrete piston 10 where the sealing body 11 contacts the inner wall of the concrete and conveying cylinder 40 is easily worn, and as shown in fig. 1 to 4, the sealing body 11 has an easily worn portion P. That is, during operation of the concrete piston 10, the outer peripheral surface of the seal body 11 is easily worn at a portion close to the concrete, and the end surface (tip surface) of the seal body 11 close to the concrete is easily worn at a portion close to the cylinder inner wall. By arranging the plurality of resistance elements 12 at intervals in the radial direction and the axial direction of the sealing body 11, the resistance elements 12 can be exposed when the outer peripheral surface of the sealing body 11 is worn to different degrees, and similarly, the resistance elements 12 can be exposed when the end surface of the sealing body 11 is worn to different degrees.
In the present disclosure, the plurality of resistance elements 12 may be connected in parallel or not connected to each other. When a plurality of resistance elements 12 are connected in parallel, the resistance values of the plurality of resistance elements 12 can be detected by one ohmmeter, and when the plurality of resistance elements 12 are not connected to each other and have no electrical connection relationship, one ohmmeter can be provided for each resistance element 12. As shown in fig. 3 and 5, in one embodiment of the present disclosure, a plurality of resistance elements 12 are connected in parallel, and the resistance values of the plurality of resistance elements 12 may be simultaneously detected using one ohmmeter.
As shown in fig. 2 and 4, as an alternative embodiment, there are 3 resistance elements 12, each of the 3 resistance elements 12 is a first resistance element 121, a second resistance element 122, and a third resistance element 123, each of which is annular, the first resistance element 121, the second resistance element 122, and the third resistance element 123 respectively have opposite first ends and second ends, the concrete piston 10 further includes a first common segment 13 and a second common segment 14 for electrically connecting with the electrical signal detector 30, the first common segment 13 is respectively connected to the first end of the first resistance element 121, the first end of the second resistance element 122, and the first end of the third resistance element 123, and the second common segment 14 is respectively connected to the second end of the first resistance element 121, the second end of the second resistance element 122, and the second end of the third resistance element 123. The diameters of the circular rings formed by the first resistance element 121, the second resistance element 122, and the third resistance element 123 are sequentially reduced, and the first resistance element 121 is relatively closer to the surface of the sealing body 11 for contact with concrete and also closer to the outer peripheral surface of the sealing body 11.
Upon detection, as shown in fig. 5, the first lead 31 and the second lead 32 of the electrical signal detector 30 (e.g., ohmmeter) may be electrically connected to the first common section 13 and the second common section 14, respectively. Thus, the abrasion degree of the sealing body 11 of the concrete piston 10 can be judged according to the change of the parallel resistance. In the initial stage of the sealing body 11, the first resistance element 121 located at the outermost side is not worn, the total resistance of the resistance element 12 at this time is the smallest, and as the sealing body 11 is worn, the third resistance element 123 located at the innermost side is worn until the sealing body 11 cannot normally operate, and at this time, the total resistance of the resistance element 12 is the largest.
The 3 resistance elements 12 are arranged such that the sealing body 11 has at least three wear phases, in particular.
In the initial state, the total resistance R of the resistance element 12 is R1 × R2 × R3/(R1+ R2+ R3).
In the first wear phase, the first resistance element 121 is worn out and disconnected, and at this time, the total resistance R of the resistance element 12 is R2 × R3/(R2+ R3).
In the second wear phase, the first resistance element 121 and the second resistance element 122 are both worn out and disconnected, and at this time, the total resistance R of the resistance element 12 is R3.
In the third wear phase, the first resistance element 121, the second resistance element 122, and the third resistance element 123 are all worn and disconnected, and at this time, the total resistance R of the resistance element 12 is infinity.
Thus, the wear of the sealing body 11 can be determined from the change in the resistance value. In practical application, the reserved abrasion loss of the sealing body 11 can be set firstly, namely, the abrasion loss of the sealing body 11 under normal working conditions is allowed. For example, it can be assumed that the sealing body 11 can still work normally, i.e. the concrete piston 10 can still work normally, in the first wear stage and the second wear stage, and after the third wear stage, the concrete piston 10 can not work normally, and at this time, the sealing body 11 needs to be replaced immediately so that the concrete piston 10 can work normally.
It should be noted that, for convenience of describing the wear condition of the sealing body 11, only three wear stages of the sealing body 11 are described above, and actually, the wear of the sealing body 11 belongs to a dynamic process, and may be divided into more stages, for example, when the same resistance element 12 is worn, the wear condition of the sealing body 11 at the stage can be determined according to the change of the detected resistance value in the process that the diameter of the resistance element 12 is worn by one third to one half.
In addition, the above describes only the wear detection at 3 of the resistance elements 12. In practical applications, a larger number of resistor elements 12 may be disposed in the sealing body 11 as required, so as to achieve more accurate wear detection of the sealing body 11.
In the present disclosure, concrete piston 10 may have any suitable structure and shape. As shown in fig. 1 and 2, in one embodiment of the present disclosure, the piston body further includes a piston sleeve 15, a crimping piece 16, and a connecting piece 17, the crimping piece 16 is mounted on the connecting piece 17, and can crimp the piston sleeve 15 and the sealing body 11 on the connecting piece 17, and the connecting piece 17 is used for connecting with the piston rod. As shown in fig. 6, when the concrete piston 10 is installed in the delivery cylinder 40 of the concrete delivery apparatus 100, the piston sleeve 15 can serve as a supporting framework for the concrete piston 10, and the outer peripheral surface of the sealing body 11 is in sealing contact with the inner wall of the delivery cylinder 40.
Alternatively, as shown in fig. 1 and 3, the crimping member 16 may include a cylindrical portion 161 and a pressing plate 162 formed at one end of the cylindrical portion 161, the connecting member 17 includes a connecting rod 171 and a flange 172 formed at one end of the connecting rod 171, the cylindrical portion 161 is connected to the flange 172, the piston sleeve 15 and the sealing body 11 are fitted over the cylindrical portion 161 and pressed between the flange 172 and the pressing plate 162, and the end of the sealing body 11 is in contact with the pressing plate 162. By providing the flange 172 and the pressing plate 162, the piston sleeve 15 and the sealing body 11 can be reliably mounted on the cylindrical portion 161 of the crimping member 16, and axial play and circumferential rotation of the sealing body 11 and the piston sleeve 15 are prevented. The concrete piston 10 is simple and compact in structure.
Wherein, the cylindrical part 161 of the crimping piece 16 can be mounted on the flange 172 through the fastening screw 19, so as to realize the stable connection between the crimping piece 16 and the connecting piece 17, and the sealing body 11 is convenient to detach and replace, and the replacement efficiency can be improved. In other embodiments of the present disclosure, the crimping member 16 can also be snapped with the connecting member 17 to achieve a detachable connection therebetween.
In addition, as shown in fig. 1 and 3, in an embodiment of the present disclosure, the piston body may further include an elastic support ring 18 disposed on an outer circumferential surface of the piston sleeve 15, and the elastic support ring 18 is attached to an inner wall of the conveying cylinder 40. Since the piston sleeve 15 is usually a metal member and the conveying cylinder 40 is also a metal member, if the outer peripheral surface of the piston sleeve 15 directly contacts the inner wall of the conveying cylinder 40, the piston sleeve 15 and the conveying cylinder 40 may be damaged when the piston sleeve 15 axially moves, and the elastic support ring 18 is provided to play a role in buffering and protecting the piston sleeve 15 and the conveying cylinder 40. In addition, since the elastic support ring 18 is attached to the conveying cylinder 40, the elastic support ring 18 can play a guiding role when the concrete piston 10 moves along the axial direction of the conveying cylinder 40.
In other embodiments of the present disclosure, the elastic support ring 18 may not be provided, and both the elastic support ring and the piston sleeve 15 shown in fig. 1 may be replaced with a part of the seal body 11.
As shown in fig. 6, the concrete conveying apparatus 100 may include an electrical signal detector 30, a conveying cylinder and the concrete piston 10, wherein a piston rod is disposed in the conveying cylinder 40, the piston rod is connected to the concrete piston 10, optionally, a pipe clamp 110 may be used, the outer peripheral wall of the sealing body 11 of the concrete piston 10 is connected to the inner wall of the conveying cylinder 40 in a sealing manner, and the electrical signal detector 30 is electrically connected to the resistance element 12 to detect the wear condition of the resistance element 12. As can be seen from the above discussion, the electrical signal detector 30 can be used to directly detect the resistance of the resistive element 12, or detect other measured parameters of other electrical elements electrically connected to the resistive element 12, such as voltage, current, etc., to indirectly determine the wear of the resistive element 12, and thus the seal body 11.
Optionally, in one embodiment of the present disclosure, the electrical signal detector 30 is an ohmmeter. The resistance of the resistance element 12 at different stages can be directly measured through an ohmmeter, the abrasion condition of the sealing body 11 can be known through comparison, and the method is simple, convenient and high in accuracy.
In one embodiment of the present disclosure, as shown in fig. 4, in order to facilitate the electrical connection between the resistance element 12 and the ohmmeter, one or two wire holes 20 extending to the outside may be opened in the concrete piston 10, and the wire holes 20 may extend from the position of the resistance element 12 to the rear end (end far away from the concrete) of the concrete piston 10 in a substantially axial direction, so that the first lead 31 and the second lead 32 of the ohmmeter are connected to the first common segment 13 and the second common segment 14 of the resistance element 12, respectively.
Specifically, as shown in fig. 4, the sealing body 11 is provided with a first wire guide hole 21 inclined inward, the piston sleeve 15 is provided with a second wire guide hole 22 communicated with the first guide hole 21 and extending in the axial direction, and the flange 172 is provided with a third wire guide hole 23 communicated with the second wire guide hole 22 and extending in the axial direction.
In order to prevent external factors (such as water) from affecting the accuracy of the ohmmeter resistance detection value, the ohmmeter leads may be hermetically connected to the resistor element 12 at the contact position, for example, by wrapping a sealing tape around the connection position.
As shown in fig. 6, in an embodiment of the present disclosure, the concrete conveying apparatus 100 further includes a hopper 60, an S-pipe assembly 70 disposed in the hopper 60, and a master cylinder, the conveying cylinder 40 includes a first conveying cylinder 41 and a second conveying cylinder 42, the master cylinder includes a first master cylinder 81 and a second master cylinder 82, the piston rods include a first piston rod 51 and a second piston rod 52, one end of the first piston rod 51 is connected in the first conveying cylinder 41 through a concrete piston 10, the other end of the first piston rod 51 is connected in the first master cylinder 81 through a cylinder piston, one end of the second piston rod 52 is connected in the second conveying cylinder 42 through another concrete piston 10, and the other end of the second piston rod 52 is connected in the second master cylinder 82 through a cylinder piston.
Wherein the first transfer cylinder 41 is selectively communicated with one of the hopper 60 and the S-pipe assembly 70, and the second transfer cylinder 42 is communicated with the other one of the hopper 60 and the S-pipe assembly 70. That is, when the first transfer cylinder 41 communicates with the hopper 60, the second transfer cylinder 42 communicates with the S-pipe assembly 70, and when the first transfer cylinder 41 communicates with the S-pipe assembly 70, the second transfer cylinder 42 communicates with the hopper 60.
Specifically, the working process of the concrete conveying device 100 is as follows: under the action of the hydraulic oil in the first main oil cylinder 81, the first piston rod 51 moves forward (i.e., moves toward the direction close to the hopper 60), so as to push the concrete piston 10 to move forward in the first conveying cylinder 41, push the concrete in the first conveying cylinder 41 into the S-pipe assembly 70, and pump the concrete out through the discharge port 71. Meanwhile, under the action of the hydraulic oil in the second main cylinder 82, the second piston rod 52 moves backward (i.e., moves away from the hopper 60), so as to drive the concrete piston 10 disposed on the second piston rod 52 to move backward in the second conveying cylinder 42, and the concrete in the hopper 60 is pumped into the second conveying cylinder 42. After the pumping period is completed, the S-tube assembly 70 swings in the hopper 60 and is communicated with the second conveying cylinder 42, at this time, the first conveying cylinder 41 is communicated with the hopper 60, the moving directions of the concrete pistons 10 in the two conveying cylinders 40 are also interchanged, that is, the concrete piston 10 which moves forward in the previous period (i.e., the concrete piston 10 in the first conveying cylinder 41) moves backward, the concrete in the hopper 60 is pumped into the first conveying cylinder 41, and the concrete piston 10 which moves backward in the previous period (i.e., the concrete piston 10 in the second conveying cylinder 42) moves forward, the concrete in the second conveying cylinder 42 is pushed into the S-tube assembly 70, and the concrete is pumped out of the book conveying device through the discharge port 71. The concrete pistons 10 in the two conveying cylinders 40 alternately advance and retreat under the action of the main oil cylinder 80, so that the suction and discharge of the concrete are realized, and the conveying work of the concrete conveying device 100 on the concrete is completed.
It should be noted that the working principle and working process of the S-tube assembly 70 are well known to those skilled in the art, and are not described herein.
Optionally, as shown in fig. 6, the concrete transferring apparatus 100 further includes a water tank 90, wherein the water tank 90 may be located between the first master cylinder 81 and the first transferring cylinder 41, and the water tank 90 is located between the second master cylinder 82 and the second transferring cylinder 42. In this way, in the first delivery cylinder 41, the water in the water tank 90 flows into the space located at the rear side of the concrete piston 10 (i.e., the side away from the hopper 60), and the first delivery cylinder 41, the first piston rod 51 and the concrete piston 10 can be cooled and lubricated. Similarly, in the second delivery cylinder 42, the water in the water tank 90 will flow into the space behind the concrete piston 10 (i.e. the side away from the hopper 60), and can cool and lubricate the second delivery cylinder 42, the second piston rod 52 and the concrete piston 10.
According to another aspect of the present disclosure, there is provided a method applied to the concrete piston 10 and the concrete conveying device 100, the method including: and detecting the resistance value of the resistance element 12, and if the resistance value of the resistance element 12 is greater than a preset value, indicating that the resistance element 12 reaches a preset abrasion loss, and replacing the sealing body 11. Here, the electrical signal detector 30 (e.g., an ohmmeter) may be used to detect the resistance value of the resistive element 12, and the wear of the resistive element 12 may be determined by comparing the current resistance value of the resistive element 12 with the initial resistance value of the resistive element 12, thereby determining the wear of the sealing body 11.
As can be seen from the foregoing discussion, the solution of determining the resistance change of the resistance element 12 to determine the wear condition of the sealing body 11 has at least the following advantages: firstly, the detection is intelligent, and the detection is more accurate. Secondly, it is convenient to detect, practices thrift check-out time, and is difficult for causing the damage to seal 11. Thirdly, the loss caused by the concrete piston 10 being not replaced in time due to the abrasion of the concrete piston 10 is reduced. Fourthly, the use cost is reduced. The service life of the sealing body 11 can be prolonged to the maximum, the situation that the sealing body 11 is wasted due to the fact that the sealing body 11 is replaced in advance is avoided, and meanwhile the sealing body 11 or the concrete piston 10 can be replaced in time.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. The concrete piston is characterized by comprising a piston body, a sealing body (11) and a resistance element (12), wherein the sealing body (11) is sleeved on the piston body, the resistance element (12) is preset in the sealing body (11) so as to be worn along with the sealing body (11) in the wearing process of the sealing body (11), and the resistance element (12) is provided with a first end and a second end which are used for being connected with an electric signal detector (30).
2. Concrete piston according to claim 1, characterised in that the resistance element (12) is a notched annular resistance wire which is arranged around the central axis of the sealing body (11).
3. Concrete piston according to claim 1 or 2, characterized in that said resistive element (12) is plural, said plural resistive elements (12) being arranged radially and axially at intervals along said sealing body (11).
4. Concrete piston according to claim 3, characterized in that a plurality of said resistive elements (12) are connected in parallel.
5. Concrete piston according to claim 4, characterized in that said plurality of resistive elements (12) comprises a first resistive element (121), a second resistive element (122) and a third resistive element (123) all annular, the first resistive element (121), the second resistive element (122), and the third resistive element (123) have opposing first and second ends, respectively, the concrete piston (10) further comprises a first common section (13) and a second common section (14) for electrical connection with the electrical signal detector (30), the first common segment (13) is connected to a first terminal of the first resistive element (121), a first terminal of the second resistive element (122) and a first terminal of the third resistive element (123), respectively, the second common segment (14) is connected to a second terminal of the first resistive element (121), a second terminal of the second resistive element (122), and a second terminal of the third resistive element (123), respectively.
6. Concrete piston according to claim 1, characterised in that the piston body comprises a piston sleeve (15), a crimping piece (16) and a connecting piece (17), the crimping piece (16) being mounted on the connecting piece (17) and being able to crimp the piston sleeve (15) and the sealing body (11) on the connecting piece (17), the connecting piece (17) being intended to be connected to a piston rod.
7. The concrete piston as recited in claim 6, wherein said crimping member (16) comprises a cylindrical portion (161) and a pressing plate (162) formed at one end of said cylindrical portion (161), said connecting member (17) comprises a connecting rod (171) and a flange (172) formed at one end of said connecting rod (171), said cylindrical portion (161) is detachably mounted to said flange (172), said piston sleeve (15) and said sealing body (11) are fitted over said cylindrical portion (161) and pressed between said flange (172) and said pressing plate (162), an end portion of said sealing body (11) is in contact with said pressing plate (162), and said connecting rod (171) is adapted to be connected to a piston rod.
8. Concrete conveying device, characterized in that it comprises an electrical signal detector (30), a conveying cylinder (40) and a concrete piston (10) according to any one of claims 1-7, wherein a piston rod is arranged in the conveying cylinder (40), the piston rod is connected with the concrete piston (10), the outer peripheral wall of a sealing body (11) of the concrete piston (10) is connected with the inner wall of the conveying cylinder (40) in a sealing way, and the electrical signal detector (30) is electrically connected with the resistance element (12) to detect the wear condition of the resistance element (12).
9. Concrete conveying device according to claim 8, characterized in that the electrical signal detector (30) is an ohmmeter.
10. The concrete conveying device according to claim 8, wherein the concrete conveying device (100) further comprises a hopper (60), an S-pipe assembly (70) disposed in the hopper (60), and a master cylinder, the conveying cylinder (40) comprises a first conveying cylinder (41) and a second conveying cylinder (42), the master cylinder comprises a first master cylinder (81) and a second master cylinder (82), the piston rod comprises a first piston rod (51) and a second piston rod (52), one end of the first piston rod (51) is connected in the first conveying cylinder (41) through the concrete piston (10), the other end of the first piston rod (51) is connected in the first master cylinder (81) through a cylinder piston, one end of the second piston rod (52) is connected in the second conveying cylinder (42) through another concrete piston (10), the other end of the second piston rod (52) is connected in the second main oil cylinder (82) through an oil cylinder piston,
the first delivery cylinder (41) is selectively in communication with one of the hopper (60) and the S-tube assembly (70), and the second delivery cylinder (42) is in communication with the other of the hopper (60) and the S-tube assembly (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426907.5U CN211692789U (en) | 2019-12-26 | 2019-12-26 | Concrete piston and concrete conveying device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426907.5U CN211692789U (en) | 2019-12-26 | 2019-12-26 | Concrete piston and concrete conveying device |
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| CN211692789U true CN211692789U (en) | 2020-10-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352516A (en) * | 2021-12-02 | 2022-04-15 | 中联重科股份有限公司 | Piston sealing ring, piston and concrete pumping device |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352516A (en) * | 2021-12-02 | 2022-04-15 | 中联重科股份有限公司 | Piston sealing ring, piston and concrete pumping device |
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Effective date of registration: 20201009 Address after: No.202 Xuanfu street, Xuanhua District, Zhangjiakou, Hebei Province Patentee after: Hebei Leisa Heavy Construction Machinery Co., Ltd Address before: 102206, Beijing, Shahe, Changping District Town, Sha Yang Road, Lao Wan Village North Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |