CN202971391U - Piston cylinder and concrete pump with same - Google Patents

Abstract

The utility model provides a piston cylinder and have its concrete pump. Wherein the piston cylinder includes: a cylinder (20); a piston (30) movably provided in the cylinder (20) in the axial direction of the cylinder (20); the piston rod (10) is arranged in the cylinder body (20) in a penetrating mode and is fixedly connected with the piston (30); the piston cylinder also comprises a piston stroke detection mechanism positioned in the cylinder body (20), the piston stroke detection mechanism comprises a sensor (51) and a magnetic ring (52), the sensor (51) is fixed in the cylinder body (20) to detect the stroke of the piston (30), and the magnetic ring (52) is fixed on the piston rod (10) and is axially movably arranged relative to the sensor (51). The utility model aims at providing a piston cylinder and have its concrete pump can avoid the sensor to receive the interference, increases life.

Description

Piston cylinder and concrete pump with same

technical field

The utility model relates to the technical field of concrete pump distribution valves, in particular to a piston cylinder and a concrete pump with the same.

Background technique

The distribution valves of concrete pumps mainly include pipe valves and plate valves. At present, S pipe distribution valves are widely used. As shown in Figure 1, the reversing of the S pipe distribution valve is mainly driven by the swing cylinder 90', and the torque is transmitted through the rocker arm 80' to realize the left and right swing of the S pipe 70', thereby completing the reversing work of the distribution valve. Specifically, the swing cylinder 90' pushes the rocker arm 80' to rotate, and the rocker arm 80' and the S pipe 70' are splined together to control the swing direction of the S pipe 70' and realize the reversing operation of the distribution valve.

As shown in Figure 2, it is a sectional view of the swing cylinder 90'. In order to control the piston displacement of the swing cylinder 90', to accurately control the flow of hydraulic oil entering the swing cylinder 90', to make the reversing position of the reversing valve accurate and to reduce the pumping resistance, a displacement sensor is generally installed on the swing cylinder 90' to accurately Control the displacement of the piston. The specific structure is that the front end and the rear end of the cylinder 20' are threadedly connected with the cylinder head 21' and the cylinder bottom 22' respectively, the piston 30' is located in the cylinder 20', the piston rod 10' is fixedly connected with the piston 30', and the piston rod One end of 10' extends out of the cylinder 20', and a displacement sensor 51' is fixed on the outer end surface of the cylinder bottom 22', and the sensing probe of the displacement sensor 51' passes through the piston 30' and then extends into the inner hole of the piston rod 10' The magnetic ring 52' is fixed in the piston 30' and can move with the piston 30', and the position signal of the piston 30' is obtained through the detection of the position of the induction probe by the magnetic ring 52', which is fed back to the controller.

For the swing cylinder 90' of this structure, since the displacement sensor 51' is fixed on the outer end surface of the cylinder bottom 22', the displacement sensor 51' is easily affected by external impact and interference, and is easily affected and reduced in use under severe working conditions. life.

Utility model content

The utility model aims to provide a piston cylinder and a concrete pump with the piston cylinder, which can prevent the sensor from being disturbed and increase the service life.

In order to achieve the above object, according to one aspect of the utility model, a piston cylinder is provided, including: a cylinder body; a piston movably arranged in the cylinder body along the axial direction of the cylinder body; In the body and fixedly connected with the piston; the piston cylinder also includes a piston stroke detection mechanism located in the cylinder body, the piston stroke detection mechanism includes a sensor fixed in the cylinder body to detect the piston stroke and a magnetic ring, the magnetic ring is fixed on the piston rod and It is arranged axially movable relative to the sensor.

Further, the end of the cylinder block is fixedly provided with a cylinder head flange, and the side of the cylinder head flange facing away from the piston rod has a first protruding portion, and the sensor includes a sensor head fixed in the first protruding portion, and the sensor head. The first end is connected to and protrudes from the signal wire lead-out end of the first protruding part and the induction probe is connected with the second end of the sensor head and passed through the first axial inner hole of the piston rod.

Further, the cylinder head flange has a second axial inner hole coaxially arranged with the first axial inner hole of the piston rod, the second axial inner hole includes a third inner hole segment and is located in the first protruding part and is connected to the second axial inner hole. In the fourth inner hole section where the three inner hole sections are connected, the sensor head is fixed in the fourth inner hole section, and the induction probe is passed through the third inner hole section and the first axial inner hole.

Further, the sensor head is fixed in the first protruding part through a locking mechanism, and the locking mechanism includes a lock nut screwed in the first protruding part to compress the sensor head, and the lock nut has a function for passing through the signal line to lead out end through hole.

Further, the locking mechanism also includes a washer and a first retaining ring, the washer abuts against the side of the sensor head facing away from the lock nut, the first retaining ring presses against the end surface of the lock nut facing away from the sensor head, the first The protruding part has a first annular groove matched with the first retaining ring.

Further, the first axial inner hole of the piston rod includes a first inner hole section close to the sensor head and a second inner hole section connected to the first inner hole section, and the magnetic ring of the piston stroke detection mechanism is fixed on the in the first bore section.

Further, the positioning mechanism includes a positioning ring and a pressure ring respectively clamped at both ends of the magnetic ring. The positioning ring abuts against the connecting end faces of the first inner hole segment and the second inner hole segment. The positioning ring has a ring supported between the magnetic ring and the induction probe. Second protrusion between needles.

Further, the positioning mechanism further includes a second retaining ring, the second retaining ring presses against the end surface of the pressure ring facing away from the magnetic ring, and the first inner hole segment has a second annular groove matching the second retaining ring.

According to another aspect of the utility model, a concrete pump is provided, which includes an S-pipe distribution valve, and the S-pipe distribution valve includes: a spectacle plate; an S-pipe, which is swingably arranged relative to the spectacle plate; a rocker arm, which is fixed to the S-pipe Connect; And the piston cylinder is connected with the rocker arm drive; The piston cylinder is the aforementioned piston cylinder.

Applying the technical scheme of the utility model, by setting a piston stroke detection mechanism in the cylinder body of the piston cylinder, the piston stroke detection mechanism includes a sensor fixed in the cylinder body to detect the piston stroke, so that the sensor is completely built in the cylinder body. While improving the reversing accuracy of the S pipe distribution valve, it can avoid external impact and friction, so that the piston cylinder can adapt to various harsh working conditions of the concrete pump without affecting its performance and service life.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 shows the structural representation of the S pipe valve according to the prior art;

Figure 2 shows a sectional view of a swing cylinder according to the prior art;

Figure 3 shows a cross-sectional view of a piston cylinder according to an embodiment of the present invention; and

FIG. 4 shows a partial cross-sectional view along line A-A of FIG. 3 .

Detailed ways

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

As shown in Figures 3 and 4, according to an embodiment of the present invention, a piston cylinder is provided, including a cylinder body 20, a piston 30, a piston rod 10 and a piston stroke detection mechanism, wherein the piston 30 is along the axis of the cylinder body 20 The direction is movably arranged in the cylinder body 20, the piston rod 10 is penetrated in the cylinder body 20, its first end passes through the through hole of the piston 30 and is fixedly connected with the piston 30, and its second end extends out of the cylinder body 20, The piston rod 10 moves synchronously with the piston 30 during operation. The piston stroke detection mechanism is located in the cylinder body 20 , and the piston stroke detection mechanism includes a sensor 51 fixed in the cylinder body 20 to detect the stroke of the piston 30 .

The piston stroke detection mechanism can accurately feed back the stroke position of the piston 30. After the system processes the feedback signal, it can control the reversing of the distribution valve of the S pipe more accurately, and improve the pumping resistance and the accumulation of material in the S pipe.

Specifically, the sensor head 512 of the sensor 51 is fixed in the cylinder body 20, the signal wire lead-out end 511 of the sensor 51 passes through the cylinder body 20, and the sensing probe 513 of the sensor 51 is installed on the piston rod 10 along its axial direction. Extended first axial bore. The sensor head 512 is arranged in the cylinder body 20, which can prevent external impact and wear, so as to adapt to the harsh working conditions of the concrete pump.

In order to accurately detect the piston stroke, the piston stroke detection mechanism also includes a magnetic ring 52, the magnetic ring 52 is sleeved outside the induction probe 513 and fixed in the first axial inner hole of the piston rod 10, the outer peripheral wall of the magnetic ring 52 and the piston There is a gap between the inner peripheral walls of the first axial inner hole of the rod 10 , so that the ring magnet 12 is not in contact with the piston rod 1 . The sensor 51 senses and converts the magnetic signal sent by the ring magnet 52 , and then outputs an accurate signal of the stroke of the piston 30 to an external system.

In order to facilitate the installation of the magnetic ring 52, the first axial inner hole of the piston rod 10 includes a connected first inner hole section and a second inner hole section, wherein the first inner hole section is arranged close to the sensor head 512, and the first inner hole section Extending to the first end face of the piston rod 10 , the second inner hole section extends along the axis of the piston rod 10 , and the magnetic ring 52 is fixed in the first inner hole section and moves with the piston rod 10 during operation.

Referring to FIG. 4 , the magnetic ring 52 is fixed in the first inner hole segment by a positioning mechanism. The positioning mechanism includes a positioning ring 54 and a pressure ring 55, and the positioning ring 54 and the pressure ring 55 are respectively clamped at two ends of the magnetic ring 52, so that the magnetic ring 52 is suspended in the outer peripheral wall of the induction probe 513 and the first inner hole section. In the gap between the surrounding walls, the positioning ring 54 abuts against the connecting end surfaces of the first inner hole segment and the second inner hole segment, and the positioning ring 54 and the pressure ring 55 are made of non-magnetic materials. In order to make the magnetic ring 52 more stable, the positioning ring 54 has a second protrusion supported between the magnetic ring 52 and the sensing probe 513 .

In order to position the pressure ring 55 to prevent it from getting loose, the positioning mechanism also includes a second retaining ring 53, the second retaining ring 53 is pressed against the end face of the pressure ring 55 facing away from the magnetic ring 52, and the first inner hole section has the same shape as the second ring. The second annular groove matched with the retaining ring 53 enables the second retaining ring 53 to be stuck in the second annular groove to press the pressure ring 55 .

The cylinder block 20 has a cylinder head flange 21 fixed at its end. In order to fix the sensor head 512, the side of the cylinder head flange 21 facing away from the piston rod 10 has a first protruding portion 211, and the sensor head 512 is fixed on the first protrusion 211. In the protruding portion 211 , the signal line lead-out end 511 is disposed through the first protruding portion 211 .

In order to arrange the sensing probe 513 connected with the sensor head 512, the cylinder head flange 21 has a second axial bore coaxially arranged with the first axial bore of the piston rod 10, the sensor head 512 is fixed on the second shaft Into the inner hole, the induction probe 513 passes through the second axial inner hole and extends into the first axial inner hole of the piston rod 10 .

In order to fix the sensor head 512 conveniently, the second axial inner hole includes a connected third inner hole section and a fourth inner hole section, wherein the fourth inner hole section is located in the first protrusion 211 and extends to the cylinder head flange 21 Back to the end surface of the piston rod 10, the third inner hole section extends to the end surface of the cylinder head flange 21 facing the piston rod 10, the sensor head 512 is fixed in the fourth inner hole section, and the sensing probe 513 is penetrated in the third inner hole segment and the first axial bore.

Referring to FIG. 4 in conjunction, the sensor head 512 is fixed in the fourth inner hole section through a locking mechanism. The locking mechanism includes a lock nut 62 screwed in the fourth inner hole section to compress the sensor head 512 , and the lock nut 62 has a through hole for passing through the signal wire lead-out end 511 .

In order to prevent the sensor head 512 from loosening during the working process of the piston cylinder, the locking mechanism also includes a washer 61 and a first stop ring 63, and the washer 61 abuts against the connecting end surface of the third inner hole section and the fourth inner hole section and the sensor head 512 Between to increase the pre-tightening force of the lock nut 62, while playing the role of buffering vibration.

In order to position the locking nut 62, the locking mechanism also includes a first retaining ring 63, the first retaining ring 63 is pressed against the end surface of the locking nut 62 facing away from the sensor head 512, and the fourth inner hole section has a 63 in the first annular groove, so that the first retaining ring 63 is stuck in the first annular groove to compress the locking nut 62 and further compress the sensor head 512 .

In the piston cylinder of the utility model, the sensor 51 is installed inside the oil cylinder, and has a compact structure. All built-in structures avoid scratching and damaging rings by foreign objects, and effectively ensure the service life of the sensor 51 . Take out the first retaining ring 63, unscrew the locking nut 62, and the sensor 51 can be easily disassembled and installed.

When the piston cylinder is working, oil enters the rodless cavity, and the pressure oil enters from the first oil port 41, pushing the piston 30 and the piston rod 10 to move to the left, and the magnetic ring 52 fixed on the piston rod 10 also moves to the left together, at this time , the change of the displacement of the magnetic ring 52 causes the change of the magnetic force sensed by the sensor 51, which is further converted into an output signal to the system. When oil enters the rod cavity, the magnetic ring 52 moves relatively to the right, and the magnetic force change sensed by the sensor 51 is converted into an output signal to the system again.

The piston cylinder of the utility model can accurately feed back the stroke position of the piston 30, so that the system can control the reversing of the distribution valve of the S pipe more accurately, effectively reduce the pumping resistance caused by the distribution valve of the S pipe not reversing in place, and improve the wear of the S pipe , Improve suction and pumping efficiency.

Compared with the prior art, the piston cylinder of the utility model has the characteristics of reasonable and compact structure and wide adaptability to working conditions. The sensor 51 is installed inside the cylinder body 20, without increasing the external dimensions of the piston cylinder at all. The built-in sensor 51 can make the piston cylinder adapt to various harsh working conditions of the concrete pump without affecting its performance and service life.

The utility model also provides a concrete pump, which includes an S pipe distribution valve, and the S pipe distribution valve includes a spectacle plate, an S pipe, a rocker arm and a piston cylinder. The S tube is swingably arranged relative to the spectacle plate, the rocker arm is fixedly connected to the S tube by a spline, and the piston cylinder is drivingly connected to the rocker arm, wherein the piston cylinder is the aforementioned piston cylinder.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects: by setting a piston stroke detection mechanism in the cylinder body of the piston cylinder, the piston stroke detection mechanism includes a piston stroke detection mechanism fixed in the cylinder body to detect The sensor of the piston stroke makes the sensor completely built in the cylinder body. While improving the reversing accuracy of the S pipe distribution valve, it can avoid external impact and friction, so that the piston cylinder can adapt to various harsh working conditions of the concrete pump without affect its performance and service life.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (9)

1. piston cylinder comprises:

Cylinder body (20);

Piston (30) is arranged in described cylinder body (20) movingly along the axial direction of described cylinder body (20); And

Piston rod (10) is located in described cylinder body (20) and with described piston (30) and is fixedly connected with;

It is characterized in that, described piston cylinder also comprises the piston stroke feeler mechanism that is positioned at described cylinder body (20), described piston stroke feeler mechanism comprises is fixed in sensor (51) and the magnet ring (52) to detect described piston (30) stroke in described cylinder body (20), and it is upper and can arrange with axial motion with respect to described sensor (51) that described magnet ring (52) is fixed in described piston rod (10).

2. piston cylinder according to claim 1, it is characterized in that, the end of described cylinder body (20) is fixedly installed cylinder end flange (21), described cylinder end flange (a 21) side of described piston rod (10) dorsad has the first protuberance (211), described sensor (51) comprises the sensor head (512) that is fixed in described the first protuberance (211), be connected with the first end of described sensor head (512) and stretch out the signaling line Outlet (511) of described the first protuberance (211) and be connected with the second end of described sensor head (512) and be located in inducing probes (513) in the first axial bore of described piston rod (10).

3. piston cylinder according to claim 2, it is characterized in that, described cylinder end flange (21) has the second axial bore with the described first coaxial setting of axial bore of described piston rod (10), the 4th endoporus section that described the second axial bore comprises the 3rd endoporus section and is positioned at described the first protuberance (211) and is connected with described the 3rd endoporus section, described sensor head (512) is fixed in described the 4th endoporus section, and described inducing probes (513) is located in described the 3rd endoporus section and described the first axial bore.

4. piston cylinder according to claim 2, it is characterized in that, described sensor head (512) is fixed in described the first protuberance (211) by locking mechanism, described locking mechanism comprises and is bolted in the locking nut (62) to compress described sensor head (512) in described the first protuberance (211), and described locking nut (62) has be used to the through hole that passes described signaling line Outlet (511).

5. piston cylinder according to claim 4, it is characterized in that, described locking mechanism also comprises packing ring (61) and the first back-up ring (63), described packing ring (61) and described sensor head (512) side of described locking nut (62) dorsad connect, described the first back-up ring (63) is pressed on described locking nut (62) dorsad on the end face of described sensor head (512), and described the first protuberance (211) has the first circular groove that matches with described the first back-up ring (63).

6. piston cylinder according to claim 2, it is characterized in that, the first axial bore of described piston rod (10) comprises the first endoporus section and the second endoporus section that is connected with described the first endoporus section near described sensor head (512), and the described magnet ring (52) of described piston stroke feeler mechanism is fixed in described the first endoporus section by positioning means.

7. piston cylinder according to claim 6, it is characterized in that, described positioning means comprises positioning ring (54) and the pressure ring (55) that is clamped in respectively described magnet ring (52) two ends, the connecting end surface butt of described positioning ring (54) and described the first endoporus section and the second endoporus section, described positioning ring (54) has the second protuberance that is supported between described magnet ring (52) and described inducing probes (513).

8. piston cylinder according to claim 7, it is characterized in that, described positioning means also comprises the second back-up ring (53), described the second back-up ring (53) is pressed on described pressure ring (55) dorsad on the end face of described magnet ring (52), and described the first endoporus section has the second circular groove that matches with described the second back-up ring (53).

9. a concrete pump, comprise S pipe distributing valve, and described S pipe distributing valve comprises:

Glasses plate;

The S pipe arranges swingably with respect to described glasses plate;

Rocking arm is fixedly connected with described S pipe; And

Piston cylinder is connected with described rocking arm driving;

It is characterized in that, described piston cylinder is the described piston cylinder of any one in claim 1 to 8.

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