CN220890236U - Anti-impact hydraulic support device and hydraulic support - Google Patents

Abstract

The utility model relates to the field of radiation protection equipment, in particular to an anti-impact hydraulic support device and a hydraulic support, wherein the support device comprises: a first sleeve; the piston rod is arranged on the first sleeve in a matching way, the piston rod is provided with a first piston arranged on the first sleeve, the first piston divides the interior of the first sleeve into a first chamber and a second chamber, and the first chamber is communicated with the first pipeline; the support device further includes: a first solenoid valve mounted to a portion of the first sleeve in the first chamber; a sensor capable of monitoring impact at the top of the piston rod; and the control unit is connected with the sensor and the first electromagnetic valve and controls the first electromagnetic valve to be opened when the value monitored by the sensor is larger than a set threshold value, so that the medium at the lower side of the first piston can enter the upper side of the first piston. According to the pressure relief avoiding structure and the pressure relief avoiding method, which are provided by the utility model, the problems in the prior art are effectively solved by optimally arranging the pressure relief avoiding structure and the pressure relief avoiding method when the first sleeve is impacted.

Description

Anti-impact hydraulic support device and hydraulic support

Technical Field

The utility model relates to the field of radiation protection equipment, in particular to an anti-impact hydraulic support device and a hydraulic support.

Background

The hydraulic support rod is widely applied to the field of support, such as roof support for coal mining, and support structures in partial building and civil construction. In some working conditions, the hydraulic support rods are subjected to instantaneous impact, such as periodic impact in the coal mining process. When the supporting rod is impacted by instant pressing, the problem that the supporting rod is bent and the cylinder is exploded is prevented in order to protect the supporting rod. In some prior art, through setting up the pressure valve at the bracing piece, when the bracing piece receives the pressure to surpass the setting value, the pressure valve is to the bracing piece pressure release so that the bracing piece is retracted. By adopting the mode, the check valve can respond after a certain degree and time of pressure action, and the check valve responds gradually, so that the pressure release response speed of the check valve is relatively slow, and the pressure release effect is limited under the rapid large impact action.

Thus, improvements to existing hydraulic support technology are urgently needed.

Disclosure of utility model

In order to solve the technical problems, the utility model provides an anti-impact hydraulic support device and a hydraulic support, which effectively solve the problems in the prior art by optimally setting a pressure relief avoiding structure and a pressure relief avoiding method when a first sleeve is impacted.

In order to solve the above problems, the present utility model provides an impact-resistant hydraulic support device including: the first sleeve is provided with an inner cavity, and a first pipeline communicated with the outside is arranged at the bottom of the first sleeve; the piston rod is arranged on the first sleeve in a matching way, the piston rod is provided with a first piston arranged on the first sleeve, the first piston divides the interior of the first sleeve into a first chamber and a second chamber, and the first chamber is communicated with the first pipeline; the support device further includes: a first solenoid valve mounted to a portion of the first sleeve within the first chamber; a sensor capable of monitoring impact at the top of the piston rod; and the control unit is connected with the sensor and the first electromagnetic valve, and controls the first electromagnetic valve to be opened when the value monitored by the sensor is larger than a set threshold value, so that the medium at the lower side of the first piston can enter the upper side of the first piston.

Further, the supporting device further comprises a second sleeve, a second piston is arranged at the end part, away from the piston rod, of the first sleeve, the second piston is arranged in the second sleeve in a matched mode, and a communication hole communicated with the second sleeve is formed in the first sleeve;

The section of the second sleeve, which is away from the piston rod, is provided with a first port, and the first port and the communication hole form the first pipeline.

Further, the second sleeve is provided with a first buffer cavity, and the first buffer cavity is provided with a second electromagnetic valve communicated with the bottom of the second sleeve.

Further, a second buffer cavity is formed in the first cavity of the first sleeve, and a third electromagnetic valve communicated with the bottom of the first sleeve is arranged in the second buffer cavity.

Further, the sensor is at least one selected from a pressure sensor and an acceleration sensor.

Further, the first piston is mounted with the first solenoid valve.

Further, the first piston is provided with the first electromagnetic valve, a liquid passing gap is formed between the first sleeve and the second sleeve, the first sleeve is provided with a second port at the part of the second chamber, and the second port is communicated with the liquid passing gap.

Further, the side wall of the first sleeve forms a communication cavity which communicates the liquid passing gap and the second port.

The utility model also provides a hydraulic support, which comprises the anti-impact hydraulic support device.

The pressure relief avoiding structure and the pressure relief avoiding method have the beneficial effects that the structure is simple in structure, and the problems in the prior art are effectively solved by optimally arranging the pressure relief avoiding structure and the pressure relief avoiding method when the first sleeve is impacted.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of the medium flow when the control unit opens the first solenoid valve in the embodiment shown in fig. 1.

Fig. 3 is a schematic structural view of another embodiment of the present utility model.

Wherein: 1. a first sleeve; 2. a first cache chamber; 3. a piston rod; 4. a first piston; 5. a first chamber; 6. a second chamber; 7. a first electromagnetic valve; 8. a sensor; 9. a second sleeve; 10. a second piston; 11. a communication hole; 12. a first port; 13. a liquid passing gap; 14. a second port; 15. a third port; 16. a communication chamber; 17. a second electromagnetic valve; 18. a second cache chamber; 19. a third electromagnetic valve; 20. a liquid discharge valve.

Detailed Description

In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but that the present utility model may be practiced otherwise than as described herein, and therefore the scope of the present utility model is not limited by the specific embodiments disclosed below.

In addition, in the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that a direct connection indicates that two bodies connected together do not form a connection relationship by an excessive structure, but are connected to form a whole by a connection structure. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the present utility model, as shown in fig. 1 to 3, there is provided an impact-resistant hydraulic support device including: the first sleeve 1 is provided with an inner cavity, and a first pipeline communicated with the outside is arranged at the bottom of the first sleeve 1; a piston rod 3, the piston rod 3 is cooperatively installed in the first sleeve 1, the piston rod 3 is provided with a first piston 4 installed in the first sleeve 1, the first piston 4 divides the interior of the first sleeve 1 into a first chamber 5 and a second chamber 6, the first chamber is communicated with the first pipeline, and the supporting device further comprises: a first electromagnetic valve 7 mounted on a portion of the first sleeve 1 in the first chamber 5; a sensor 8 capable of monitoring the impact of the top of the piston rod 3; and the control unit is connected with the sensor 8 and the first electromagnetic valve 7, and controls the first electromagnetic valve 7 to be opened when the value monitored by the sensor 8 is larger than a set threshold value, so that the medium at the lower side of the first piston 4 can enter the upper side of the first piston 4.

When the supporting device is used, the supporting device is placed at a supporting and supporting position, and a pressure medium is provided through the first pipeline, so that the piston rod 3 of the piston rod 3 extends upwards to support. When the piston rod 3 is impacted, when the control unit obtains that the monitoring of the sensor 8 is vertical to be larger than a set threshold value, the control unit controls the first electromagnetic valve 7 to be opened quickly, so that pressure-bearing medium on the lower side of the first piston 4 in the first sleeve 1 can be discharged from the first chamber 5 quickly through the electromagnetic valve, the supporting force of the piston rod 3 is reduced, the impact on the piston rod 3 is relieved, and the whole hydraulic supporting device is prevented from being damaged under the action of large impact. When the sensor 8 monitors that the value meets the set condition, the control unit can control the first electromagnetic valve 7 to be closed, so that the piston rod 3 can continuously provide stable supporting force, the piston rod can be buffered and continuously supported when being impacted greatly, and the stability of supporting and supporting is ensured.

The control unit adopted by the utility model can be completed by adopting an independent PLC processor or a main control chip. Or the control unit may be integrated with the sensor 8, the control unit being integrated with the solenoid valve.

For the structural form of the inventive supporting device, in a preferred embodiment, as shown in fig. 2, the supporting device further comprises a second sleeve 9, a second piston 10 is arranged at the end of the first sleeve 1 facing away from the piston rod 3, the second piston 10 is arranged in the second sleeve 9 in a matching way, and the first sleeve 1 is provided with a communication hole 11 for communicating with the second sleeve 9; a section of the second sleeve 9 facing away from the piston rod 3 is provided with a first port 12, the first port 12 and the communication hole 11 forming the first pipeline.

As a preferred embodiment, for the arrangement of the sensor 8, a further optimized arrangement is that the sensor 8 is selected from at least one of a pressure sensor 8, an acceleration sensor 8.

Preferably, the impact force received by the piston rod 3 is directly monitored by the pressure sensor 8, so that the control unit can control the opening of the first solenoid valve 7 when the impact force exceeds a set value. Or the instantaneous acceleration of the piston rod 3 when being impacted is detected through the acceleration sensor 8, so that the acceleration value of the piston rod 3 is obtained when the piston rod 3 is impacted and the downward compression pressure medium moves to generate acceleration, the impact force of the piston rod 3 is judged through the acceleration value of the piston rod 3, and when the acceleration value of the piston rod 3 exceeds a set value, the control unit opens the first electromagnetic valve 7.

Wherein, as for the mounting position of the pressure sensor 8, the pressure sensor 8 is preferably mounted on top of the piston rod 3. As for the installation position of the acceleration sensor 8, as shown in fig. 1 and 2, the acceleration sensor 8 may be installed on the top of the piston rod 3 or on the side of the piston rod 3.

In a preferred embodiment, the structure of the supporting device of the utility model is further optimized in that the supporting device further comprises a second sleeve 9, a second piston 10 is arranged at the end part of the first sleeve 1, which is away from the piston rod 3, the second piston 10 is arranged in the second sleeve 9 in a matching way, and the first sleeve 1 is provided with a communication hole 11 communicated with the second sleeve 9; a section of the second sleeve 9 facing away from the piston rod 3 is provided with a first port 12, the first port 12 and the communication hole 11 forming the first pipeline.

As shown in fig. 1-2, by arranging the second sleeve 9, two-stage expansion and contraction of the piston rod 3 and the first sleeve 1 can be realized, so that when impact is applied, the first piston 4 and the second piston 10 synchronously move to match with buffering avoidance.

The structure of the support device is not limited to the two-stage telescopic form shown in the drawings, but in alternative embodiments may be a 1-stage telescopic form as shown in fig. 3. Or more than two levels of telescoping, such as three levels of telescoping.

Preferably, a further optimization of the present utility model is that the second sleeve 9 is formed with a first buffer chamber 2, and the first buffer chamber 2 is provided with a second electromagnetic valve 17 communicated with the bottom of the second sleeve 9.

As shown in fig. 2, by providing the first buffer cavity 2, when the value monitored by the control unit receiving sensor 8 exceeds the set value, the control unit opens the second electromagnetic valve 17, so that the pressure-bearing medium of the second sleeve 9 can enter the first buffer cavity 2 for pressure relief.

In the embodiment shown in fig. 2, the first buffer chamber 2 and the second solenoid valve 17 are arranged at the bottom of the second sleeve 9 for the construction of the first buffer chamber 2. This is not a structural limitation of the utility model and in an alternative embodiment the first buffer chamber 2 may also be provided in the side wall of the second sleeve 9.

As a preferred embodiment, as shown in fig. 3, the first sleeve is formed with a second buffer chamber 18 in the first chamber, and the second buffer chamber 18 is provided with a third electromagnetic valve 19 communicating with the bottom of the first sleeve. Can function similarly to the first buffer chamber in the embodiment shown in fig. 1, so that when the control unit receives that the value monitored by the sensor 8 exceeds the set value, the control unit opens the third solenoid valve 19, so that the pressure medium of the first sleeve can enter the second buffer chamber 18 for pressure relief. In the two-stage telescopic structure shown in fig. 1, the second buffer chamber 18, the third solenoid valve 19 and the communication hole shown in fig. 3 may be disposed in the first sleeve of fig. 1.

In the embodiment shown in fig. 1, a drain valve 20 is also provided in the figure for draining the medium entering the first buffer chamber. In the corresponding embodiment shown in fig. 3, a drain valve 20 is also provided at the second buffer chamber 18, as shown in fig. 3.

In the embodiment shown in fig. 1, in further detail, the first piston 4 is fitted with the first solenoid valve 7. As shown in fig. 2, after the first electromagnetic valve 7 is opened, the pressure-bearing medium in the first chamber 5 enters the second chamber 6, so that the space increased by the second chamber 6 can be moved downwards by the first piston 4, the pressure-bearing medium is guided to flow rapidly, and the pressure-yielding efficiency is further improved.

The arrangement of the first electromagnetic valve 7 is not limited to the position of the first piston 4 shown in fig. 2, but in an alternative embodiment, the first electromagnetic valve 7 may be arranged on the side wall of the first sleeve 1, or the first electromagnetic valve 7 may be installed in a separate chamber after the first chamber 5 is connected by a separate pipe.

In the embodiment shown in fig. 1, a further optimization is that the first piston 4 is provided with a first electromagnetic valve 7, a liquid passing gap 13 is formed between the first sleeve 1 and the second sleeve 9, the first sleeve 1 is provided with a second port 14 at the part of the second chamber 6, and the second port 14 is communicated with the liquid passing gap 13.

As shown in fig. 2, by providing the liquid passing gap 13, the first electromagnetic valve 7 is opened, when the piston rod 3 moves downwards, the volume of the liquid passing gap 13 expands along with the downward movement of the piston rod 3, so that when the medium flows outwards at the second port 14, the volume expansion of the liquid passing gap 13 promotes the medium to flow out of the second port 14, and further promotes the piston rod 3 to release the pressure quickly.

In the embodiment shown in fig. 2, the first sleeve 1 is formed with a second pipe communicating with the outside in a portion of the second chamber 6; the second sleeve 9 is provided with a third port 15 communicated with the liquid passing gap 13 at one side of the second piston 10 facing the piston rod 3; the third port 15, the hydraulic gap 13, and the second port 14 form the second pipeline.

For the first port 12, in a preferred embodiment, a stop valve may be disposed at the first port 12 to control the pressure relief of the first port 12, and an overflow valve may be disposed at the first port 12 in parallel with the stop valve to overflow and relieve the pressure when the internal medium pressure is high.

In the embodiment shown in fig. 1, for the structure of the first sleeve 1, and in particular as shown, the side wall of the first sleeve 1 forms a communication chamber 16 communicating the liquid passing gap 13 with the second port 14. As shown, a second line can thus be formed directly between the first sleeve 1 and the second sleeve 9.

In an alternative embodiment, an external tube may also be used to connect the second port 14 and the second sleeve 9, such that the external tube communicates through the liquid gap 13 and the second port 14.

The utility model also provides a hydraulic support, which comprises any anti-impact hydraulic support device. The hydraulic support can be in a specific form of a fully-mechanized mining hydraulic support, an end support hydraulic support, a tunneling support hydraulic support and a single hydraulic support, and the anti-impact hydraulic support device can be used as a single hydraulic cylinder of the hydraulic support, so that the hydraulic support can be quickly prevented from being pressed when being impacted greatly, and the stability of support is improved.

The utility model also provides a control method based on the anti-impact hydraulic support device of any one, which comprises the following steps:

S1, closing a first electromagnetic valve 7, and inputting a medium through a first pipeline to enable a piston rod 3 to move upwards to enter a supporting working condition;

at this time, the supporting device can normally support and support.

S2, setting a set threshold value of the monitoring value of the sensor 8;

The set threshold value of the sensor 8 is determined according to the type of the sensor 8 and the supporting load of the supported working condition and the supporting capacity of the supporting device.

S3, when the monitoring value of the sensor 8 is smaller than a set threshold value, the first electromagnetic valve 7 is kept in a closed state, and when the monitoring value of the sensor 8 is larger than or equal to the set threshold value, the control unit controls the first electromagnetic valve 7 to be opened, a medium at the lower side of the first piston 4 enters the upper side of the first piston 4, and the first piston 4 moves downwards;

and S4, after the set condition is met, the first electromagnetic valve 7 is closed.

For the control of the first solenoid valve 7, in a preferred embodiment, the closing of the first solenoid valve 7 comprises: when the pressure of the medium at the lower side of the first piston 4 is smaller than a set value, the first electromagnetic valve 7 is closed;

Therefore, the pressure of the medium can be monitored to close the first electromagnetic valve 7 again after the pressure of the medium is reduced, so that the cylinder explosion of the supporting device can be prevented, and the supporting force of the supporting device can be kept stable.

Or in S4, closing the first electromagnetic valve 7 includes: when the supporting force of the first piston 4 rod 3 is smaller than a set value, the first electromagnetic valve 7 is closed;

whereby the support device enters a normal support state after the piston rod 3 is subjected to an impact pressure weakening.

Or in S4, closing the first electromagnetic valve 7 includes: when the downward moving distance of the rod 3 of the first piston 4 is larger than or equal to a set value, the first electromagnetic valve 7 is closed. In this way, the first electromagnetic valve 7 can be closed to maintain the supporting effect after the first piston 4 rod 3 is pressed for a certain distance.

Or in S4, the closing of the first solenoid valve includes: after the first electromagnetic valve is opened for a set time, the first electromagnetic valve is closed. Therefore, after the first electromagnetic valve is controlled to be opened, the first electromagnetic valve is directly controlled to be closed at the set time, the closing of the first electromagnetic valve is not required to be responded according to the external conditions, the closing operation time of the first electromagnetic valve is shortened, and the whole supporting device can quickly enter a supporting state.

In the embodiment provided with the second buffer cavity 18 and the third buffer cavity, for the control of pressure relief, when the control unit receives that the value monitored by the sensor 8 exceeds the set value, the control unit can open the second electromagnetic valve and the third electromagnetic valve 19 while opening the first electromagnetic valve so as to synchronously respond and quickly relieve pressure. Or the control unit can also control the first electromagnetic valve to open for pressure relief firstly, and then control the second electromagnetic valve and the third electromagnetic valve 19 to relieve pressure secondarily according to the pressure relief time and the data change monitored by the sensor so as to achieve the effect of graded pressure relief.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (8)

1. An impact resistant hydraulic support device comprising:

the first sleeve is provided with an inner cavity, and a first pipeline communicated with the outside is arranged at the bottom of the first sleeve;

The piston rod is installed in the cooperation first sleeve, the piston rod has the first piston of installing first sleeve, first piston will divide into first cavity and second cavity in the first sleeve, first cavity with first pipeline intercommunication, its characterized in that, strutting arrangement still includes:

a first solenoid valve mounted to a portion of the first sleeve within the first chamber;

A sensor capable of monitoring impact at the top of the piston rod;

And the control unit is connected with the sensor and the first electromagnetic valve, and controls the first electromagnetic valve to be opened when the value monitored by the sensor is larger than a set threshold value, so that the medium at the lower side of the first piston can enter the upper side of the first piston.

2. The shock-resistant hydraulic support device according to claim 1, further comprising a second sleeve, wherein a second piston is provided at an end of the first sleeve facing away from the piston rod, the second piston being fitted in the second sleeve, and the first sleeve being provided with a communication hole communicating with the second sleeve;

The section of the second sleeve, which is away from the piston rod, is provided with a first port, and the first port and the communication hole form the first pipeline.

3. The impact resistant hydraulic support device of claim 2, wherein the second sleeve is formed with a first buffer chamber, the first buffer chamber being provided with a second solenoid valve in communication with a bottom of the second sleeve.

4. The impact resistant hydraulic support device according to claim 1, wherein the first sleeve is formed with a second buffer chamber in the first chamber, the second buffer chamber being provided with a third solenoid valve in communication with the bottom of the first sleeve.

5. The impact resistant hydraulic support device of claim 1, wherein the first piston is mounted with the first solenoid valve.

6. The impact hydraulic support device according to claim 2, wherein the first piston is mounted with the first solenoid valve, a hydraulic passage is formed between the first sleeve and the second sleeve, and the first sleeve is provided with a second port at a portion of the second chamber, the second port being in communication with the hydraulic passage.

7. The impact resistant hydraulic support device of claim 6 wherein a sidewall of the first sleeve forms a communication chamber that communicates the hydraulic gap and the second port.

8. A hydraulic mount comprising an impact resistant hydraulic support device as claimed in any one of claims 1 to 7.