CN114905455A - Piston rod extraction device - Google Patents

Abstract

The invention discloses a device for pulling out a piston rod, which comprises a base, a push assembly, a connecting seat, a pulling part and a bearing part. The base is provided with an installation part and a support part arranged at intervals; The assembly hole is suitable for the piston rod of the disassembled hydraulic cylinder to pass through, and the cylinder body of the disassembled hydraulic cylinder can be blocked with the installation part on the peripheral side of the assembly hole; the push assembly is detachably arranged on the installation part, and the push assembly overlaps Connected to the support part, the pushing component is retractable and has a driving end; the connecting seat is fixed on the driving end of the pushing component; It is connected with the piston rod of the dismantled hydraulic cylinder; the bearing piece is connected with the connecting seat and can be slidably assembled on the mounting part, and the bearing piece is suitable for dragging the piston rod after the piston rod is separated from the cylinder. The piston rod pulling device of the invention has good safety during operation, and also avoids the waste of water resources and the problems of environmental pollution.

Description

Piston rod extraction device

technical field

The invention relates to the technical field of mechanical maintenance, in particular to a device for pulling out a piston rod of a hydraulic cylinder of a hydraulic support.

Background technique

The jack (hydraulic cylinder) is the main support element in the hydraulic support for coal mining support. During the overhaul of the hydraulic support, the piston rod of the jack needs to be pulled out from the cylinder of the jack, but in the related art, the piston rod is pulled out. In the process, there is a waste of water resources, a large safety hazard, easy to hurt people, and easy to cause environmental pollution and other problems.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

Therefore, the embodiments of the present invention provide a piston rod pulling device, which has good safety in operation and avoids the waste of water resources and environmental pollution.

The piston rod extracting device according to the embodiment of the present invention includes: a base, the base is provided with a mounting part and a supporting part arranged at intervals, and the mounting part is provided with an assembly hole, and the assembly hole is suitable for the hydraulic cylinder to be disassembled. The piston rod passes through, and the cylinder body of the hydraulic cylinder to be dismantled can be blocked with the mounting part on the peripheral side of the assembly hole; a push assembly, the push assembly is detachably arranged on the mounting part, And the push assembly is overlapped on the support portion, the push assembly is retractable and has a driving end; a connecting seat, the connecting seat is fixed on the driving end of the push assembly; a pulling member, the The pulling member is rotatably connected with the connecting seat, and the pulling member is provided with a connecting portion, and the connecting portion is suitable for being connected with the piston rod of the hydraulic cylinder to be dismantled; a bearing member, the bearing member is connected to the The connecting base is connected and slidably assembled on the mounting portion, and the bearing member is suitable for dragging the piston rod after the piston rod is separated from the cylinder body.

The piston rod pulling device of the embodiment of the present invention has good safety during operation, and also avoids the waste of water resources and the problems of environmental pollution.

In some embodiments, the mounting portion is provided with an annular portion, the inner diameter of the annular portion is larger than the diameter of the mounting hole, and the annular portion is provided on the side of the mounting portion away from the connection seat, so The annular portion surrounds the outer peripheral side of the fitting hole, and the annular portion is adapted to be inserted into the cylinder body of the disassembled hydraulic cylinder.

In some embodiments, a transition sleeve is included, the outer diameter of the transition sleeve is the same as the inner diameter of the annular portion, the annular portion and the fitting hole are arranged concentrically, and the diameter of the fitting hole is smaller than that of the annular portion The inner diameter of the transition sleeve is adapted to fit in the annular portion, and the transition sleeve is adapted to be inserted into the cylinder body of the hydraulic cylinder to be dismantled.

In some embodiments, the mounting portion is provided with a mounting hole and a plurality of fixing holes, the mounting hole is located below the mounting hole, and the plurality of fixing holes are provided on the outer peripheral side of the mounting hole and along the The installation holes are arranged at intervals in the circumferential direction, and the installation holes are suitable for the pushing assembly to pass through. The fasteners are matched in the plurality of fixing holes in a one-to-one correspondence.

In some embodiments, the support portion is provided with a limit groove, the push component is cylindrical, and the shape of the limit groove and the shape of the installation hole are adapted to the limit groove.

In some embodiments, the pulling member is pivotally connected to the connecting base through a first shaft, the extension direction of the pulling member is consistent with the telescopic direction of the pushing assembly, and the pulling member is provided with There are a plurality of adjustment holes, the plurality of adjustment holes are arranged at intervals along the extending direction of the pulling member, and the first shaft can be fitted in each of the adjustment holes.

In some embodiments, both ends of the pulling member are provided with connecting parts, the connecting parts are U-shaped, and the piston rod of the dismantled hydraulic cylinder is fitted in the connecting parts and passes through the second shaft rotatably connected to the connecting portion.

In some embodiments, the mounting portion includes a vertical plate and two side plates, the vertical plate is connected between the two side plates, the mounting hole is provided on the vertical plate, and the push-up assembly Assembled to the vertical plate.

In some embodiments, the base includes a base, a first reinforcement and a second reinforcement, the mounting part and the support part are provided on the base, the first reinforcement and the second reinforcement The pieces are oppositely arranged, the first reinforcing piece is connected between one of the side plates and the support portion, the second reinforcing piece is connected between the other side plate and the support portion, and the top A push assembly is located between the first stiffener and the second stiffener.

In some embodiments, the cross-section of the carrier is U-shaped, the mounting portion is provided with a U-shaped groove, the U-shaped groove is located between the mounting hole and the push component, and the The carrier is slidably fitted in the U-shaped groove.

Description of drawings

FIG. 1 is a left side perspective view of a piston rod extraction device according to an embodiment of the present invention.

FIG. 2 is a right side perspective view of the piston rod extraction device according to the embodiment of the present invention.

FIG. 3 is a perspective view of the front side of the piston rod extracting device according to the embodiment of the present invention.

FIG. 4 is a left side perspective view of the base in FIG. 1 .

FIG. 5 is a rear perspective view of the base in FIG. 1 .

FIG. 6 is a schematic diagram of the assembly of the transition sleeve of the piston rod extraction device according to the embodiment of the present invention.

Reference number:

base 1; mounting part 11; vertical plate 111; side plate 112; annular part 113; mounting hole 114; mounting hole 115; fixing hole 116; U-shaped groove 117; 13; base 14; second reinforcement 15;

Push component 2;

connection seat 3;

Pulling member 4; connecting part 41; adjusting hole 42;

carrier 5;

Dismantled hydraulic cylinder 6; piston rod 61;

first axis 7;

the second axis 8;

Transition set 9.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

As shown in FIG. 1 to FIG. 5 , the device for pulling out the piston rod according to the embodiment of the present invention includes a base 1 , a pushing assembly 2 , a connecting seat 3 , a pulling member 4 and a bearing member 5 .

The base 1 is provided with a mounting portion 11 and a supporting portion 12 arranged at intervals. The mounting portion 11 is provided with an assembly hole 114 , and the assembly hole 114 is suitable for the piston rod 61 of the hydraulic cylinder 6 to be disassembled to pass through, and the cylinder of the hydraulic cylinder 6 to be disassembled. The body can stop with the mounting portion 11 on the peripheral side of the mounting hole 114 . As shown in FIG. 1 , the mounting portion 11 and the supporting portion 12 may be arranged at intervals along the front-rear direction. It should be noted that the diameter of the assembling hole 114 may be larger than the diameter of the piston rod 61 of the hydraulic cylinder 6 to be removed, but smaller than the diameter of the cylinder body of the hydraulic cylinder 6 to be removed.

The push assembly 2 is detachably disposed on the mounting portion 11 , and overlaps the support portion 12 . The push assembly 2 is telescopic and has a driving end. As shown in FIG. 1 , the jacking assembly 2 can be a jack, the jacking assembly 2 can be fixed on the mounting portion 11 , and the rear end of the jacking assembly 2 can be overlapped on the support portion 12 . Thereby, the stability of the installation of the push assembly 2 can be ensured.

As shown in FIG. 1 , the connecting base 3 is fixed on the driving end of the push assembly 2 , the pulling member 4 is rotatably connected to the connecting base 3 , and the pulling member 4 is provided with a connecting portion 41 , and the connecting portion 41 is suitable for connecting with the Disconnect the piston rod 61 of the hydraulic cylinder 6 and connect it.

As shown in FIG. 1 , the carrier 5 can be elongated, and the carrier 5 can extend along the front-rear direction. The carrier 5 is connected to the connecting seat 3 and can be slidably assembled to the mounting portion 11 . The carrier 5 is suitable for After the piston rod 61 is separated from the cylinder body, the piston rod 61 is pulled up.

When the piston rod extracting device of the present invention is used, the piston rod 61 of the hydraulic cylinder 6 to be removed can pass through the assembly hole 114 , and the cylinder body of the hydraulic cylinder 6 to be removed can stop with the mounting portion 11 . The pulling element 4 can then be connected to the piston rod 61 . Finally, the ejector assembly 2 is activated. Since the cylinder body of the dismantled hydraulic cylinder 6 is blocked and limited by the mounting portion 11 , the piston rod 61 can be disengaged from the cylinder under the pulling force of the ejector assembly 2 .

The present invention is made based on the inventors' findings and understanding of the following facts and problems:

In the related art, in the process of pulling out the piston rod 61 from the cylinder, since the guide sleeve on the outside of the piston rod 61 is seriously corroded between the inner wall of the cylinder barrel, the disassembly resistance increases, and the piston rod 61 is not easy to be pulled out, so it is necessary to use emulsification. The liquid pump drives high-pressure emulsion into the lower chamber of the dismantled hydraulic cylinder 6, and uses the emulsion to push the piston and guide sleeve out of the cylinder. Due to the relatively large volume of the hydraulic cylinder used for the hydraulic support, the inner diameter of the cylinder of a large column reaches 0.3 meters, and the depth of the cylinder reaches 1.6 meters. In this way, each time the piston rod 61 in 10 large columns is removed, it will consume more than 1 tons of water, the consumption of water is relatively large, resulting in a waste of water resources.

Secondly, the disassembly resistance between some guide sleeves and the cylinder body is relatively large, and it is necessary to inject a higher pressure emulsion into the cylinder body, and sometimes the piston rod 61 is pushed out to a relatively far place, which may injure people or objects. , causing insecurity during disassembly.

In addition, when using the emulsion pump to drive the piston rod 61 of the jack to move outward, it is necessary to add a certain proportion of emulsified oil into the water storage tank, and rely on water to dilute it into an emulsion, which will cause water pollution.

The piston rod extraction device of the embodiment of the present invention avoids the need to inject high-pressure emulsion into the dismantled hydraulic cylinder 6, thereby avoiding the waste of water resources and the problems of water pollution. In addition, because the piston rod 61 is connected to the push assembly 2 through the pulling member 4 and the connecting seat 3, the situation that the piston rod 61 is suddenly separated from the cylinder body and is driven far away is avoided, the safety of use is ensured, and the hidden safety hazard is eliminated. .

In some embodiments, an annular portion 113 is provided on the mounting portion 11 , and the inner diameter of the annular portion 113 is larger than the diameter of the mounting hole 114 . The outer peripheral side of the hole 114 and the annular portion 113 are suitable for inserting the cylinder block of the hydraulic cylinder 6 to be removed.

As shown in FIG. 5 , the annular portion 113 may be integrally formed with the mounting portion 11 , the annular portion 113 may be cylindrical and disposed on the rear side of the mounting portion 11 , and the annular portion 113 may be arranged concentrically with the mounting hole 114 . Therefore, when in use, the cylinder body of the hydraulic cylinder 6 to be disassembled can be inserted into the annular portion 113 , which has a limiting effect on the cylinder body, and can enhance the accuracy of the drawing direction of the piston rod 61 .

In some embodiments, as shown in FIG. 6 , the piston rod extraction device includes a transition sleeve 9 , the transition sleeve 9 can be annular, the outer diameter of the transition sleeve 9 is consistent with the inner diameter of the annular portion 113 , the annular portion 113 and the assembly The holes 114 are arranged concentrically, and the diameter of the mounting holes 114 is smaller than the inner diameter of the annular portion 113 .

In this way, the piston rod extraction device can be adapted to the dismantling requirements of the dismantled hydraulic cylinders 6 of different radial dimensions, and the situation that the cylinder of small size cannot be adapted to the annular portion 113 is avoided.

In some embodiments, as shown in FIG. 4 , the mounting portion 11 is provided with mounting holes 115 and a plurality of fixing holes 116 , the mounting holes 115 are located below the mounting holes 114 , and the plurality of fixing holes 116 are provided on the outer peripheral side of the mounting holes 115 The mounting holes 115 are arranged at intervals along the circumferential direction of the mounting holes 115. The mounting holes 115 are suitable for passing through the push-up assembly 2. The push-up assembly 2 is connected to the mounting portion 11 through a plurality of fasteners, and the plurality of fasteners are one by one. Correspondingly fit in the plurality of fixing holes 116 . The fasteners can be bolts, and the outer peripheral side of the push assembly 2 can be provided with a flange plate. After the push assembly 2 passes through the installation hole 115, the flange plate of the push assembly 2 can be connected to the mounting portion by the fasteners. 11 Connection is fixed. Therefore, the installation and disassembly of the push-up assembly 2 are facilitated, and the fixed structural strength is also ensured.

In some embodiments, the support portion 12 is provided with a limiting slot 121 , the push assembly 2 is cylindrical, and the shape of the limiting slot 121 and the shape of the mounting hole 115 are both adapted to the limiting slot 121 . As shown in FIG. 5 , the limit slot 121 can be generally U-shaped, the notch of the limit slot 121 faces upward, and the bottom of the limit slot 121 can be regarded as a semicircular groove. Yes, and the radial dimension of the semicircular groove is substantially the same as the radial dimension of the mounting hole 115 . In this way, the flatness of the assembly of the ejector assembly 2 can be ensured, and the precision of the telescopic direction of the ejector assembly 2 can be ensured, and the situation that the piston rod 61 is skewed during the extraction process can be avoided.

In some embodiments, as shown in FIG. 2 , the pulling member 4 is pivotally connected to the connecting base 3 through the first shaft 7 , and the extension direction of the pulling member 4 is consistent with the telescopic direction of the pushing assembly 2 , that is, the pulling member Both 4 and the ejector assembly 2 may extend in the front-rear direction. The pulling member 4 is provided with a plurality of adjustment holes 42 , and the plurality of adjustment holes 42 are arranged at intervals along the extending direction of the pulling member 4 , and the first shaft 7 can fit in each adjustment hole 42 . When in use, the first shaft 7 can be inserted into different adjustment holes 42, so that the length between the pulling member 4 and the piston rod 61 can be adjusted, so that the pulling member 4 can be adapted to the dismantled hydraulic cylinders 6 of different specifications. The dismantled hydraulic cylinder 6 can be adapted to different telescopic amounts (relative displacement between the piston rod 61 and the cylinder).

In some embodiments, as shown in FIG. 2 , both ends of the pulling member 4 are provided with connecting parts 41 , the connecting parts 41 are U-shaped, and the piston rod 61 of the hydraulic cylinder 6 to be disassembled fits in the connecting parts 41 and passes through the connecting parts 41 . The second shaft 8 is rotatably connected to the connecting portion 41 . Thus, the connection between the pulling member 4 and the piston rod 61 is facilitated. The provision of the two connecting portions 41 has a backup effect.

In some embodiments, as shown in FIG. 5 , the mounting portion 11 includes a vertical plate 111 and two side plates 112 , the vertical plate 111 is connected between the two side plates 112 , and the mounting hole 114 is provided on the vertical plate 111 , and the vertical plate 111 is pushed up. The assembly 2 is assembled to the vertical plate 111 . In this way, the structural strength of the mounting portion 11 can be ensured, and the usage requirements can be met.

In some embodiments, the base 1 includes a base 14 , a first reinforcing member 13 and a second reinforcing member 15 . The base 14 may be in the shape of a rectangular parallelepiped. The mounting portion 11 and the supporting portion 12 are provided on the base 14 . The first reinforcing member 13 and The second reinforcement members 15 are arranged opposite to each other, the first reinforcement member 13 is connected between one side plate 112 and the support portion 12 , the second reinforcement member 15 is connected between the other side plate 112 and the support portion 12 , and the push assembly 2 is located at between the first reinforcement member 13 and the second reinforcement member 15 .

As shown in FIGS. 3 to 5 , both the first reinforcing member 13 and the second reinforcing rib may be L-shaped, and the first reinforcing member 13 and the second reinforcing member 15 may be arranged in parallel and spaced apart in the left-right direction. In this way, the mounting portion 11 and the supporting portion 12 can be connected as a whole, which has the effect of enhancing the overall structural strength.

In some embodiments, as shown in FIG. 2 , the cross section of the carrier 5 is U-shaped. As shown in FIG. 4 , the mounting portion 11 is provided with a U-shaped groove 117 , and the U-shaped groove 117 is located in the assembly hole 114 and the push Between the components 2 , and the carrier 5 is slidably fitted in the U-shaped groove 117 .

The front end of the carrier 5 can be connected and fixed by screws equal to the connecting seat 3. When the connecting seat 3 moves, the carrier 5 can move synchronously with the connecting seat 3. When the piston rod 61 is pulled out from the cylinder, the piston rod The rear side of the 61 will fall to the bearing member 5, thus avoiding the situation that the piston rod 61 is easy to damage the jacking assembly 2, which has a protective effect, and also avoids the situation that the piston rod 61 is likely to fall and hurt the operator. security.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean a specific feature, structure, material, or description described in connection with the embodiment or example. Features are included in at least one embodiment or example of the invention. 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. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the above-mentioned embodiments have been shown and described, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention, and those of ordinary skill in the art can make changes, modifications, substitutions and alterations to the above-mentioned embodiments. All fall within the protection scope of the present invention.

Claims (10)

1. A piston rod extracting device, comprising:

the hydraulic cylinder comprises a base, a piston rod and a cylinder body, wherein the base is provided with installation parts and supporting parts which are arranged at intervals, the installation parts are provided with assembly holes, the assembly holes are suitable for the piston rod of a disassembled hydraulic cylinder to pass through, and the cylinder body of the disassembled hydraulic cylinder can be blocked with the installation parts on the periphery side of the assembly holes;

the pushing component is detachably arranged on the mounting part, is lapped on the supporting part and can be contracted and is provided with a driving end;

the connecting seat is fixed at the driving end of the pushing assembly;

the pulling piece is rotatably connected with the connecting seat, a connecting part is arranged on the pulling piece, and the connecting part is suitable for being connected with a piston rod of the disassembled hydraulic cylinder;

a bearing connected with the connecting seat and slidably fitted to the mounting portion, the bearing adapted to drag the piston rod after the piston rod is detached from the cylinder body.

2. The piston rod extracting device according to claim 1, wherein an annular portion is provided on the mounting portion, an inner diameter of the annular portion is larger than an aperture of the fitting hole, the annular portion is provided on a side of the mounting portion away from the connecting seat, the annular portion surrounds an outer peripheral side of the fitting hole, and the annular portion is adapted to allow a cylinder body of the removed hydraulic cylinder to be inserted.

3. The piston rod extracting device according to claim 2, comprising a transition sleeve, wherein an outer diameter of the transition sleeve is consistent with an inner diameter of the annular portion, the annular portion and the fitting hole are concentrically arranged, a bore diameter of the fitting hole is smaller than the inner diameter of the annular portion, the transition sleeve is adapted to be fitted in the annular portion, and the transition sleeve is adapted to be inserted by a cylinder body of the disassembled hydraulic cylinder.

4. The piston rod extracting device according to claim 1, wherein the mounting portion is provided with a mounting hole and a plurality of fixing holes, the mounting hole is located below the assembling hole, the plurality of fixing holes are arranged on an outer peripheral side of the mounting hole and are circumferentially spaced along the mounting hole, the mounting hole is adapted to allow the pushing assembly to pass therethrough, the pushing assembly is connected to the mounting portion through a plurality of fasteners, and the plurality of fasteners are fitted in the plurality of fixing holes in a one-to-one correspondence manner.

5. The piston rod extracting device according to claim 4, wherein a limiting groove is provided on the supporting portion, the pushing assembly is cylindrical, and both the shape of the limiting groove and the shape of the mounting hole are adapted to the limiting groove.

6. The piston rod extracting device according to claim 1, wherein the pulling member is pivotally connected to the connecting seat via a first shaft, an extending direction of the pulling member is identical to a retracting direction of the pushing assembly, the pulling member is provided with a plurality of adjusting holes, the adjusting holes are arranged at intervals along the extending direction of the pulling member, and the first shaft is capable of being fitted in each of the adjusting holes.

7. The piston rod extracting device according to claim 6, wherein the pulling member has a connecting portion at both ends thereof, the connecting portion is U-shaped, and the piston rod of the disassembled hydraulic cylinder is fitted in the connecting portion and rotatably connected to the connecting portion via a second shaft.

8. The piston rod extracting device according to claim 1, wherein the mounting portion includes a vertical plate and two side plates, the vertical plate is connected between the two side plates, the assembling hole is formed in the vertical plate, and the pushing assembly is assembled on the vertical plate.

9. The piston rod extracting apparatus according to claim 8, wherein the base includes a base, a first reinforcing member and a second reinforcing member, the mounting portion and the supporting portion are provided at the base, the first reinforcing member and the second reinforcing member are arranged oppositely, the first reinforcing member is connected between one of the side plates and the supporting portion, the second reinforcing member is connected between the other of the side plates and the supporting portion, and the pushing assembly is located between the first reinforcing member and the second reinforcing member.

10. The piston rod extracting apparatus according to any one of claims 1 to 9, wherein the bearing member has a U-shaped cross section, the mounting portion has a U-shaped groove, the U-shaped groove is located between the fitting hole and the pushing assembly, and the bearing member is slidably fitted in the U-shaped groove.

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