WO2013013520A1 - Detection device and concrete pumping apparatus - Google Patents

Abstract

A detection device is used for detecting the height of a material in a container. The detection device comprises a probing rod (1), a plurality of detection units being axially arranged on the probing rod, the detection unit comprising a switch element and a membrane (3) covering the switch element, the membrane (3) being capable of turning on the switch element that corresponds to a material position when being deformed due to the extrusion of the material; and a control mechanism (5), comprising a control unit (51) electrically connected with the switch element, the control unit (51) being used for calculating the height of the material stored in the container according to the connection/disconnection condition of the switch element. The detection device can detect the height of the material in the container in real time, control the discharging speed according to the height of the material, and prevent the materials from flowing out of the container due to the excessive quantity or an air suction phenomenon of the pumping apparatus due to insufficient materials. Also disclosed is a concrete pumping apparatus, comprising the detection device.

Description

 Detecting device and concrete pumping device The present application claims priority to Chinese patent application filed on July 28, 2011 by the Chinese Patent Office, application number 201110212642.4, and the invention titled "a detecting device and concrete pumping device" The entire contents of which are incorporated herein by reference.

Technical field

 The present invention relates to the field of concrete pumping equipment, and more particularly to a detecting device for detecting the height of a material in a hopper of a pumping device, and a concrete pumping device using the above detecting device.

Background technique

 At present, concrete construction usually involves two processes of concrete transportation and concrete pumping. Concrete transportation mixers are usually used to transport concrete from concrete mixing station to construction site. Concrete pump truck is installed at construction site. Concrete transportation mixer truck pours concrete into concrete. In the hopper of the pump truck, the concrete pump truck then pumps the concrete in the hopper to the construction site to realize the transportation and spring delivery of the concrete.

 When the concrete transport mixer dumps the concrete into the hopper of the concrete pump truck, the following problems exist: Since the volume of the hopper is fixed, if the discharge speed is too fast, the amount of concrete in the hopper is too large, and the poured concrete It will overflow from the hopper, causing waste of concrete. If the discharge speed is too slow, the amount of concrete in the hopper will be too small, and the pumping system of the concrete pump truck may have suction phenomenon, which will affect the concrete pumping efficiency.

 Therefore, it is an urgent problem to provide a detecting device for measuring the height of the concrete in the hopper of the concrete pump truck in real time to prevent the above problems from occurring.

Summary of the invention

In order to overcome the above-mentioned drawbacks and deficiencies of the prior art, an object of the present invention is to provide a detecting device for detecting the height of a material in a container. The detecting device comprises: a detecting rod, which is provided with a plurality of detecting units in the axial direction. The detecting unit includes a switching element and a diaphragm disposed on the switching element, and the diaphragm is capable of conducting a switching element corresponding to a position of the material when the material is pressed and deformed; the control mechanism includes the switch The control unit is electrically connected to the component, and the control unit is configured to calculate the height of the material stored in the container according to the on/off of the switching component. Preferably, the switching element comprises a pair of metal contacts and a conductive sheet, and the conductive sheet is disposed on one of the metal contacts or on the diaphragm.

 Preferably, the outer side wall of the detecting rod defines a plurality of grooves or through holes, and each of the grooves or the through holes is provided with a connecting plate, and each of the switching elements is respectively disposed on one connecting plate.

 Preferably, the top end of the detecting rod opens a gas passage toward the bottom end, the gas passage is in communication with the groove or the through hole, and the control mechanism further includes an inflating element, and the inflating element is connected to the gas passage The inflatable element can inflate the gas passage and jack the diaphragm.

 Preferably, the outer side wall of the detecting rod defines a plurality of grooves or through holes, and elastic members are disposed on the side walls of each of the grooves or the through holes, and one end of the elastic member is fixed to the side wall of the groove or the through hole. The other end is held against the diaphragm.

 Preferably, a gas passage is defined in the outer side wall of the detecting rod, the gas passage penetrates the top end of the detecting rod, and a connecting plate is disposed above the gas passage, and the switching element is disposed on the connecting plate .

 Preferably, the control unit comprises a signal output interface and a signal input interface, wherein the metal contacts are respectively connected to a signal output interface and a signal input interface, the signal output interface sends a signal, and the diaphragm is pressed and deformed by the material. And the conductive sheet is in communication with the metal contact, and the signal input interface detects a signal sent by the signal output interface to determine the number of times the switching element is turned on.

 It is an object of the present invention to provide a detecting device for detecting the height of a material in a container, the detecting device comprising: a detecting rod provided with a plurality of pairs of metal contacts; a diaphragm deformable by an external force, the covering And a plurality of conductive sheets corresponding to the positions of the plurality of pairs of metal contacts for electrically connecting the metal contacts, each conductive sheet being disposed on the diaphragm or The conductive sheet corresponds to one of the metal contacts; when the diaphragm is deformed by an external force, the conductive sheet corresponding to the position of the external force contacts each pair of metal contacts corresponding to the conductive sheet; the control mechanism includes a control unit electrically connected to the plurality of pairs of metal contacts, the control unit configured to calculate a height of a material stored in the container according to on/off of the plurality of pairs of metal contacts.

 Preferably, the outer side wall of the detecting rod defines a plurality of grooves or through holes, and each of the grooves or the through holes is provided with a connecting plate, and each pair of metal contacts are respectively disposed on one connecting plate.

Preferably, the top end of the detecting rod opens a gas passage having an intake end in the direction of the bottom end, the gas passage is in communication with the groove or the through hole, and the control mechanism further includes an inflating element. The inflatable element is in communication with the gas passage, and the inflatable element inflates the gas passage to lift the diaphragm.

 Preferably, the outer side wall of the detecting rod defines a plurality of grooves, and an elastic member is disposed on a side wall of each groove, and one end of the elastic member is fixed on the side wall of the groove, and the other end is abutted on the conductive On top of the sheet to lift the film.

 Preferably, a gas passage is defined in the outer side wall of the detecting rod, the gas passage penetrates the top end of the detecting rod, and a connecting plate is disposed above the gas passage, and the pair of metal contacts are disposed on the Connected to the board.

 The present invention also provides a concrete pumping apparatus using the above detection apparatus.

 The detecting device can detect the height of the material in the container in real time, can control the discharging speed according to the height of the material, prevent the material from overflowing from the container, or the material is too small, and the pumping device sucks out.

 Fig. 1 is a schematic view showing the operation of the detecting device inserted into the hopper according to the first preferred embodiment of the present invention.

 FIG. 2 is a schematic structural view of a detecting device according to a first preferred embodiment of the present invention. FIG. 3 is a circuit diagram of a control unit, a metal contact, and a conductive sheet of the detecting device according to the first preferred embodiment of the present invention.

 FIG. 4 is a partial schematic structural view of a detecting device according to a second preferred embodiment of the present invention. Fig. 5 is a schematic view showing the structure of a detecting rod of a detecting device according to another preferred embodiment of the present invention.

 FIG. 6 is a schematic diagram showing the structure of a detecting device according to still another preferred embodiment of the present invention. Figure 7 is a schematic illustration of another alternative construction of the conductive sheets and metal contacts in the embodiment disclosed in Figures 1 through 6.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to FIG. 1 to FIG. 7 in the preferred embodiments of the present invention. Referring to Figures 1 and 2, the present invention provides a detecting device for use in a concrete pumping apparatus to measure the height of materials stored in a container such as a hopper 90 of a concrete pump truck in real time. The detecting device comprises a detecting rod 1, a diaphragm 3 and a control mechanism 5.

 The detecting rod 1 of the first preferred embodiment of the present invention has a hollow rod-shaped or tubular structure. The outer side wall 10 of the detecting rod 1 defines a plurality of grooves 11 along its axial direction, and a connecting plate is arranged above each groove 11. 17. Each of the connecting plates 17 is provided with a pair of metal contacts 19, and both ends of the connecting plate 17 are fixed to the outer side wall 10. The top end of the detecting rod 1 opens a gas passage 13 having an intake end in the direction of the bottom end. The gas passage 13 is provided with a conducting wire (not shown), and the conducting wire connects each pair of metal contacts 19 with the control. The mechanism 5 is connected. A communication groove 15 is defined in the bottom of each groove 11 to connect each groove 11 with the gas passage 13.

 The number of the diaphragms 3 corresponds to the number of the grooves 11, and each of the diaphragms 3 is fixed to the outer side wall 10 of the periphery of the corresponding groove 11 to cover the corresponding groove 11. A conductive sheet 31 is provided on one side of each of the diaphragms 3 toward the metal contacts 19. Each of the conductive sheets 31 and a pair of metal contacts 19 constitute a switching circuit which can electrically connect a pair of metal contacts 19 when the diaphragm 3 is pressed.

 The control mechanism 5 includes a control unit 51, an electric motor 53, and an inflator 55. One end of the control unit 51 is connected to the motor 53 and the other end is connected to each pair of metal contacts 19 via a conductive wire. The control unit 51 is configured to control the opening and closing of the motor 53 and also to scan the conduction and disconnection of each pair of metal contacts 19, and determine the hopper 90 according to the number of metal contacts 19 conducting. The height of the material stored in it. Referring to FIG. 3, FIG. 3 is a circuit diagram of the control unit 51 and the metal contacts 19 and the conductive sheets 31.

The process of determining the height of the material in the hopper 90 by the control unit 51 by the twelve pairs of metal contacts 19 provided on the probe 1 will now be described. The control unit 51 includes signal output interfaces x1, x2, x3 and signal input interfaces yl, y2, y3, y4. Among them, the signal output interface xl, x2, x3 can output high level or low level under the control of the program. The signal input interfaces yl, y2, y3, y4 are used for signals received by the detector to be high or low. Each pair of metal contacts 19 is connected to a signal output interface and a signal input interface, respectively. When one of the conductive sheets 31 is pressed to connect the corresponding metal contacts 19, the signal output interface and the signal input interface connected to the pair of metal contacts 19 are turned on. When the signal output interface outputs a high level, the signal input interface connected to it detects a high level. By rotating the signal output interfaces xl, x2, x3 in turn Level, and judge the state of the signal input interface yl, y2, y3, y4 level to determine which metal contacts 19 are turned on by the pressed conductive sheet 31, and the control unit 51 determines that the metal contact 19 is The number of the conductive sheets 31 connected to each other can further calculate the distance between the conductive metal contacts 19 and the bottom end of the detecting rod 1, so that the height of the material in the hopper 90 can be judged. The motor 53 is used to control the opening and closing of the inflatable element 55. The inflatable member 55 is a gas pump that communicates with the gas passage 13 and is inflated into the gas passage 13 when the inflatable member 55 is opened to fill the diaphragm 3 with gas.

 When the detecting device is used for height detection of the material in the hopper 90, the inflating member 55 is first controlled to be opened by the motor 53, and the gas passage 13 is inflated by the inflating member 55, and the gas enters the concave portion through the communication groove 15. Each of the diaphragms 3 is further swelled in the grooves 11. The probe 1 is then inserted into the material 90. Preferably, the bottom end of the probe 1 is flush with the bottom surface of the hopper 90. The diaphragm 3 inserted into the material is pressed under the squeezing action of the material so that the conductive sheet 31 comes into contact with the corresponding pair of metal contacts 19 to conduct the metal contacts 19. The control unit 51 can detect the number of conductive metal contacts 19 and calculate the distance between the conductive metal contacts 19 farthest from the bottom end of the detecting rod 1 and the bottom end of the detecting rod 1. The height of the material in the hopper 90 can be judged.

 The detecting device can detect the height of the material in the hopper 90 in real time, and can control the discharging speed according to the height of the material, so that the amount of material entering the hopper 90 is not excessive, and no excess material overflows from the hopper 90. , to avoid waste of materials; also can make the amount of material entering the hopper 90 not too small, and there will be no suction of the pumping equipment.

 Referring to FIG. 4, the gas passage 201 of the detecting rod 200 of the detecting device of the second preferred embodiment of the present invention is opened on the outer side wall 203 of the detecting rod 200, and the top end of the detecting rod 200 is penetrated. Both ends of the connecting plate 205 are fixed to the outer side walls 203 of both ends of the gas passage 201. A plurality of pairs of metal contacts 207 are spaced apart from the web 205. The diaphragm 230 is of unitary type and is directly disposed on the gas passage 201. The diaphragm 230 is provided with a conductive sheet 231 at a position corresponding to each pair of metal contacts 207. The detecting device of this configuration is the same as the detecting device of the first preferred embodiment, and therefore will not be described again.

Referring to FIG. 5, it can be understood that the detecting rod 1 in another preferred embodiment of the present invention may be a hollow rod-shaped or tubular structure having an open end, which is a gas passage 13. A plurality of through holes 101 are defined in the outer side wall 10 of the detecting rod 1 along the axial direction thereof, and the through holes 101 and the gas The body channels 13 are in communication. A connecting plate 17 is disposed at each of the through holes 101. Each of the connecting plates 17 is provided with a pair of metal contacts 19, and both ends of the connecting plate 17 are fixed on the outer side wall 10. Each of the diaphragms 3 is fixed to the outer side wall 10 of the corresponding through hole 101 to cover the corresponding through hole 101. A conductive sheet 31 is provided on one side of each of the diaphragms 3 facing the metal contacts 19. Each of the conductive sheets 31 and a pair of metal contacts 19 constitute a switching circuit, and when the diaphragm 3 is pressed, the conductive sheets 31 can conduct a pair of metal contacts 19.

 Referring to FIG. 6, it can be understood that the detecting rod in another preferred embodiment of the present invention can be provided with an elastic member 8 on the side wall of each groove 11, and one end of the elastic member 8 is fixed to the side wall of the groove 11. The other end is abutted on the conductive sheet 31, and the diaphragm 3 is lifted by the elastic force of the elastic member 8. The conductive wires of the control unit 51 are connected to the pair of metal contacts 19 through the communication groove 15 and the gas passage 13. When the diaphragm 3 is pressed by the material, the diaphragm 3 and the elastic member 8 are held together on the metal contact 19, and the number of the metal contacts 19 connected by the conductive sheets 31 is judged by the control unit 51. When the detecting rod 1 is taken out of the material, the diaphragm 3 is swelled by the restoring force of the elastic member 8 to separate the conductive sheet 31 from the corresponding metal contact 19.

 It can be understood that the conductive sheet on the diaphragm in the above embodiments can be disposed on one of each pair of metal contacts 19 as the conductive sheet 60 of the probe. The specific structure of the conductive sheet 60 can be seen in FIG. One end of the conductive sheet 60 may be directly fixed on one of each pair of metal contacts 19, and the other end is disposed above or on one side of the other metal contact 19, and the conductive sheet is deformed when the diaphragm is pressed by the material. And the diaphragm is held against the other metal contact 19 to electrically connect the pair of metal contacts 19.

 It will be understood that the combination of the conductive sheets and the metal contacts in the above embodiments can be regarded as a switching element. At the same time, the diaphragm 3 and the switching element can be regarded as the detecting unit on the detecting rod 1 so that the control unit 51 detects the amount by which the detecting unit is pressed and deformed by the material to make the switching element conductive.

 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Rights request  A detecting device for detecting a height of a material in a container, wherein: the detecting device comprises:  a detecting rod (1) having a plurality of detecting units arranged in the axial direction, the detecting unit comprising a switching element and a diaphragm (3) disposed on the switching element, the diaphragm (3) being squeezed by material When the pressure is deformed, the switching element corresponding to the material position can be turned on;  A control mechanism (5) comprising a control unit (51) electrically connected to the switching element, the control unit (51) for calculating the height of the material stored in the container based on the on/off of the switching element.  2. The detecting device according to claim 1, wherein: said switching element comprises a pair of metal contacts (19) and a conductive piece, said conductive piece being disposed on one of the metal contacts (19) or On the membrane (3).  The detecting device according to claim 1 or 2, characterized in that the outer side wall (10) of the detecting rod (1) defines a plurality of grooves (11) or through holes (101), each groove (11) Or a connection plate (17) is arranged above the through hole (101), and each of the switching elements is respectively disposed on one connecting plate (17).  The detecting device according to claim 3, characterized in that: the top end of the detecting rod (1) opens a gas passage (13) toward the bottom end, the gas passage (13) and the groove (11) Or the through hole (101) is in communication, the control mechanism (5) further comprising an inflatable element (55), the inflatable element (55) being in communication with the gas passage (13), the inflatable element (55) The gas passage (13) can be inflated and the diaphragm (3) can be jacked up.  The detecting device according to claim 1, characterized in that: the outer side wall (10) of the detecting rod (1) defines a plurality of grooves (11) or through holes (101) in each groove ( 11) or a side wall of the through hole (101) is provided with an elastic member (8), the end of the elastic member (8) is fixed to the side wall of the groove (11) or the through hole (101), and the other end 4 is held on the membrane (3).  The detecting device according to claim 1, wherein: a gas passage is defined in an outer side wall of the detecting rod (1), and the gas passage penetrates a top end of the detecting rod, and the gas passage is A connecting plate is arranged on the upper side, and the switching element is disposed on the connecting plate. The detecting device according to claim 2, wherein: the control unit (51) comprises a signal output interface and a signal input interface, and the metal contacts (19) are respectively connected to a signal output interface and a signal input The interface is connected, the signal output interface sends a signal, The diaphragm (3) is compressed by the material to connect the conductive sheet to the metal contact (19), and the signal input interface detects a signal sent by the signal output interface to determine that the switching element is guided The number of passes.  8. A detecting device for detecting a height of a material in a container, wherein: the detecting device comprises:  a detecting rod (1) having a plurality of pairs of metal contacts (19) thereon;  a diaphragm (3) deformable by an external force, which is disposed on the plurality of pairs of metal contacts (19); and corresponding to the plurality of pairs of metal contacts (19 M stand-up for electrically connecting the metal a plurality of conductive sheets of the contact (19), each conductive sheet being disposed on the film (3) or a metal contact (19) corresponding to the conductive sheet; the diaphragm (3) When deformed by an external force, the conductive sheet corresponding to the position of the external force may be brought into contact with each pair of metal contacts (19) corresponding to the conductive sheet;  The control mechanism (5) includes a control unit (51) electrically connected to the plurality of pairs of metal contacts (19), the control unit (51) for turning on/off according to the plurality of pairs of metal contacts (19) Calculate the height of the material stored in the container.  The detecting device according to claim 8, characterized in that: the outer side wall (10) of the detecting rod (1) defines a plurality of grooves (11) or through holes (101), each groove (11) Or a connecting plate (17) is disposed above the through hole (101), and each pair of metal contacts (19) is respectively disposed on one connecting plate (17).  The detecting device according to claim 9, characterized in that: the top end of the detecting rod (1) opens a gas passage (13) having an intake end toward the bottom end, the gas passage (13) communicating with the groove (11) or the through hole (101), the control mechanism (5) further comprising an inflatable element (55), the inflatable element (55) and the gas passage (13) In communication, the inflatable element (55) inflates the gas passage (13) to lift the diaphragm (3).  The detecting device according to claim 8, characterized in that: the outer side wall (10) of the detecting rod (1) defines a plurality of grooves (11), which are arranged on the side wall of each groove (11) An elastic member (8), the end of the elastic member (8) is fixed to the side wall of the recess (11), and the other end is abutted on the conductive sheet to lift the diaphragm (3). The detecting device according to claim 8, wherein: a gas passage is defined in an outer side wall of the detecting rod, and the gas passage penetrates a top end of the detecting rod, A connecting plate is disposed above the gas passage, and the pair of metal contacts are disposed on the connecting plate.  A concrete pumping apparatus comprising a detecting device, characterized in that: the detecting device is the detecting device according to any one of claims 1-12.