Directional joint cutting device

Abstract

The utility model provides a directional joint cutting device which comprises a base arranged on a supporting base face and provided with a first oil way and a second oil way. The main sleeve is arranged on the base, a main mounting cavity and an oil storage groove which are communicated with the first end of the first oil way and the first end of the second oil way respectively are formed in the main sleeve, and the main piston is arranged in the main mounting cavity in a sliding mode; the cutter assembly comprises a fixing piece and a cutter which are connected, the fixing piece is installed on the main sleeve, and the main piston is in driving connection with the cutter to drive the cutter to stretch or retract; the auxiliary sleeve is arranged on the base, an auxiliary mounting cavity communicating with the second end of the first oil way and the second end of the second oil way is formed in the auxiliary sleeve, and the auxiliary piston is arranged in the auxiliary mounting cavity in a sliding mode so that hydraulic oil can flow to the main mounting cavity from the oil storage groove to drive the main piston to slide; the problem that in the prior art, a kerf of a test piece for a large-size directional hydraulic fracturing experiment is manufactured through manual cutting, so that the precision is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mining engineering, in particular to a directional cutting device. Background Art

[0002] With the improvement of production technology, the development of steeply inclined and extra-thick coal seams has gradually become the new focus of coal resource exploitation. Horizontal segmented fully-mechanized caving is one of the most common mining methods for steeply inclined and extra-thick coal seams.

[0003] However, the horizontal segmented fully-mechanized caving of steeply inclined and extra-thick coal seams faces the problem of difficulty in breaking the top coal. Since the top coal is hard and thick, it is not easy to break and collapse, which leads to a low recovery rate of coal resources.

[0004] In order to improve the top coal release rate, manufacturers mostly use hydraulic fracturing weakening and blasting weakening technologies. Studies have shown that by weakening the top coal, the top coal release can be improved and the top coal release rate can be effectively increased. In recent years, due to the increase in the control of explosives and the need for coal mine safety, the number of mining areas that use blasting to weaken the top coal has gradually decreased. Therefore, the technology of weakening the top coal through hydraulic fracturing has become the focus of research, and directional hydraulic fracturing technology is an important part of hydraulic fracturing.

[0005] The large-scale directional hydraulic fracturing experiment is a laboratory simulation method for studying the flow of fracturing fluid in formations and the expansion of directional hydraulic fracturing cracks. In order to prepare specimens for large-scale directional hydraulic fracturing experiments, it is necessary to make directional cuts in the injection holes to create guided cracks.

[0006] At present, most specimens are cut manually, which has the following problems:

[0007] (1) The slit accuracy is low. The control of the slit position and depth depends on the experience of the experimenter. Its accuracy and consistency are difficult to guarantee, which affects the repeatability and reliability of the experiment.

[0008] (2) The cutting efficiency is low, and manual cutting requires the experimenter to spend a lot of time, which increases the preparation time of the experiment;

[0009] (3) The safety is poor. Manual cutting requires manual operation by the operator, which poses certain safety hazards. Utility Model Content

[0010] The main purpose of the utility model is to provide a directional slitting device to solve the problem of low precision of slitting of test pieces of large-size directional hydraulic fracturing experiments in the prior art due to manual cutting.

[0011] In order to achieve the above-mentioned purpose, the utility model provides a directional slitting device, comprising: a base, the base is arranged on a supporting base surface, and a first oil circuit and a second oil circuit are arranged on the base at intervals; a main sleeve and a main piston, the main sleeve is arranged on the base, and a main installation cavity and an oil storage tank are opened on the main sleeve, a first end of the first oil circuit is communicated with the main installation cavity, a first end of the second oil circuit is communicated with the oil storage tank, and the main piston is slidably arranged in the main installation cavity in a direction close to or away from the base; a tool assembly, the tool assembly comprises a fixing member and a tool movably arranged on the fixing member, the fixing member is mounted on the main sleeve, and the main piston is connected to the tool driving to drive the tool to open or contract relative to the fixing member; an auxiliary sleeve and an auxiliary piston, the auxiliary sleeve is arranged on the base, and an auxiliary installation cavity is arranged on the auxiliary sleeve, the second end of the first oil circuit and the second end of the second oil circuit are both communicated with the auxiliary installation cavity, and the auxiliary piston is slidably arranged in the auxiliary installation cavity in a direction close to or away from the base, so that the hydraulic oil flows from the oil storage tank to the main installation cavity to drive the main piston to slide in a direction away from the base.

[0012] Furthermore, the directional slitting device includes: a first one-way valve, which is arranged in the first oil circuit, the first oil circuit includes a first pipe section and a second pipe section connected to each other, the first pipe section is located at one end of the second pipe section close to the main installation cavity, the pipe diameter of the first pipe section is larger than the pipe diameter of the second pipe section, and the first one-way valve is located in the first pipe section; a second one-way valve, which is arranged in the second oil circuit, the second oil circuit includes a third pipe section and a fourth pipe section connected to each other, the third pipe section is located at one end of the fourth pipe section close to the oil storage tank, the pipe diameter of the third pipe section is smaller than the pipe diameter of the fourth pipe section, and the second one-way valve is located in the fourth pipe section.

[0013] Furthermore, a third oil circuit is arranged on the base at intervals, a first end of the third oil circuit is connected to the main installation cavity, a second end of the third oil circuit is connected to the oil storage tank, the third oil circuit includes a fifth pipe segment and a sixth pipe segment connected to each other, the fifth pipe segment is located at one end of the sixth pipe segment close to the main installation cavity, and a diameter of the fifth pipe segment is smaller than a diameter of the sixth pipe segment; the directional slitting device includes a third one-way valve, and the third one-way valve is located in the sixth pipe segment.

[0014] Furthermore, the third one-way valve is a sphere, and the directional slitting device includes a pressure relief screw, which is rotatably arranged on the base, and the threaded end of the pressure relief screw abuts against or separates from the third one-way valve, so that the third one-way valve blocks the connecting port between the fifth pipe segment and the sixth pipe segment or the third one-way valve avoids the hydraulic oil flowing from the fifth pipe segment to the sixth pipe segment.

[0015] Furthermore, the directional slitting device comprises a handle, which is drivingly connected to the auxiliary piston to drive the auxiliary piston to slide.

[0016] Furthermore, the tool includes two knife bodies arranged opposite to each other and two connecting rods arranged opposite to each other, and the two knife bodies are arranged correspondingly to the two connecting rods; the first end of each knife body is hinged to the fixing member, and the second end of each knife body is a free end; the first end of each connecting rod is hinged to the middle part of the corresponding knife body, and the second end of each connecting rod is hinged to the fixing member and is slidably arranged relative to the fixing member along the sliding direction of the main piston; the main piston and the second end of each connecting rod are drivingly connected to drive the corresponding knife body to move through each connecting rod.

[0017] Furthermore, a guide groove for guiding the second end of each connecting rod is provided on the fixing member, and the guide groove extends along the sliding direction of the main piston.

[0018] Furthermore, a top plate is provided at one end of the main sleeve away from the base, and the fixing part is located in the main mounting cavity and fixedly connected to the top plate; an avoidance opening for avoiding the movement of the tool is provided on the side wall of the main sleeve, and the tool has an open state extending out of the main sleeve and a contracted state retracted into the main sleeve.

[0019] Furthermore, an observation opening is provided on the side wall of the main sleeve for observing the real-time position of the main piston.

[0020] Furthermore, the directional slitting device includes a scale, which is arranged at the observation opening to display the real-time height size of the main piston; and / or the number of the observation openings is multiple, and the multiple observation openings are arranged at intervals around the circumference of the main sleeve.

[0021] The technical solution of the utility model is applied, and the directional slitting device of the utility model comprises: a base, which is arranged on a supporting base surface, and a first oil circuit and a second oil circuit are arranged on the base at intervals; a main sleeve and a main piston, the main sleeve is arranged on the base, and a main installation cavity and an oil storage tank are arranged on the main sleeve at intervals, the first end of the first oil circuit is communicated with the main installation cavity, the first end of the second oil circuit is communicated with the oil storage tank, and the main piston is slidably arranged in the main installation cavity in a direction approaching or moving away from the base; a tool assembly, the tool assembly comprises a fixing member and a tool movably arranged on the fixing member, the fixing member is installed on the main sleeve, and the main piston is connected to the tool driving to drive the tool to open or contract relative to the fixing member; an auxiliary sleeve and an auxiliary piston, the auxiliary sleeve is arranged on the base, and an auxiliary installation cavity is arranged on the auxiliary sleeve, the second end of the first oil circuit and the second end of the second oil circuit are both communicated with the auxiliary installation cavity, and the auxiliary piston is slidably arranged in the auxiliary installation cavity in a direction approaching or moving away from the base, so that the hydraulic oil flows from the oil storage tank to the main installation cavity to drive the main piston to slide in a direction away from the base. In this way, the directional slitting device of the utility model realizes the telescopic slitting process of the tool through hydraulic drive, so that the directional slitting device can provide a more stable and precise slitting effect, and proposes an accurate and low-cost slitting method, which reduces the preparation of a large number of specimen molds and can efficiently perform slitting. Compared with the directional slitting method in the prior art, it is more convenient, safer, and has lower cost, and solves the problem of low precision of slitting of specimens in large-size directional hydraulic fracturing experiments in the prior art due to manual cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A front view of an embodiment of a directional slitting device according to the utility model is shown;

[0024] Figure 2 Shows Figure 1 A side view of the directional slitting device shown;

[0025] Figure 3 Shows Figure 1 A cross-sectional view of the directional slitting device shown in one direction;

[0026] Figure 4 Shows Figure 3 A partial enlarged view of the directional slitting device shown;

[0027] Figure 5 Shows Figure 1 A cross-sectional view of the directional slitting device in another direction is shown.

[0028] The above drawings include the following reference numerals:

[0029] 1. Base; 11. First oil circuit; 12. Second oil circuit; 13. Third oil circuit;

[0030] 2. Main sleeve; 21. Main installation cavity; 22. Oil storage tank; 23. Top plate; 24. Avoidance opening; 25. Observation opening;

[0031] 3. Main piston;

[0032] 4. tool assembly; 41. fixing member; 411. guide groove; 42. tool; 421. tool body; 422. connecting rod;

[0033] 5. Auxiliary sleeve; 51. Auxiliary installation cavity;

[0034] 6. Auxiliary piston; 7. First one-way valve; 8. Second one-way valve; 9. Third one-way valve;

[0035] 10. Pressure relief screw; 20. Handle; 30. Scale. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] like Figures 1 to 5 As shown, the utility model provides a directional slitting device, including: a base 1, the base 1 is arranged on a supporting base surface, and a first oil circuit 11 and a second oil circuit 12 are arranged on the base 1 at intervals; a main sleeve 2 and a main piston 3, the main sleeve 2 is arranged on the base 1, and a main installation cavity 21 and an oil storage tank 22 are arranged on the main sleeve 2 at intervals, a first end of the first oil circuit 11 is communicated with the main installation cavity 21, a first end of the second oil circuit 12 is communicated with the oil storage tank 22, and the main piston 3 is slidably arranged in the main installation cavity 21 in a direction close to or away from the base 1; a tool assembly 4, the tool assembly 4 includes a fixing member 41 and a fixing member 42 movably arranged on the fixing member 42. The tool 42 of the fixed part 41, the fixed part 41 is installed on the main sleeve 2, and the main piston 3 is driven and connected to the tool 42 to drive the tool 42 to open or contract relative to the fixed part 41; the auxiliary sleeve 5 and the auxiliary piston 6, the auxiliary sleeve 5 is arranged on the base 1, and the auxiliary sleeve 5 is provided with an auxiliary installation cavity 51, the second end of the first oil circuit 11 and the second end of the second oil circuit 12 are both connected to the auxiliary installation cavity 51, and the auxiliary piston 6 is slidably arranged in the auxiliary installation cavity 51 in the direction close to or away from the base 1, so that the hydraulic oil flows from the oil storage tank 22 to the main installation cavity 21, so as to drive the main piston 3 to slide in the direction away from the base 1.

[0038] In this way, the directional slitting device of the utility model realizes the telescopic slitting process of the tool 42 by hydraulic drive, so that the directional slitting device can provide a more stable and precise slitting effect, and proposes an accurate and low-cost slitting method, which reduces the preparation of a large number of specimen molds and can efficiently perform slitting. Compared with the directional slitting method in the prior art, it is more convenient, safer, and has lower cost, and solves the problem of low precision of slitting of specimens in large-size directional hydraulic fracturing experiments in the prior art due to manual cutting.

[0039] Specifically, the main installation cavity 21 is an inner hole of the main sleeve 2 , and the oil storage groove 22 is arranged on the side wall of the main sleeve 2 .

[0040] like Figure 4 As shown, the directional slitting device includes: a first one-way valve 7, which is arranged in the first oil circuit 11, and the first oil circuit 11 includes a first pipe section and a second pipe section connected to each other, the first pipe section is located at an end of the second pipe section close to the main installation cavity 21, the pipe diameter of the first pipe section is larger than the pipe diameter of the second pipe section, and the first one-way valve 7 is located in the first pipe section; a second one-way valve 8, which is arranged in the second oil circuit 12, and the second oil circuit 12 includes a third pipe section and a fourth pipe section connected to each other, the third pipe section is located at an end of the fourth pipe section close to the oil storage tank 22, the pipe diameter of the third pipe section is smaller than the pipe diameter of the fourth pipe section, and the second one-way valve 8 is located in the fourth pipe section.

[0041] In this way, the first one-way valve 7 and the second one-way valve 8 are both spheres, the outer diameter of the first one-way valve 7 is smaller than the diameter of the first pipe section and larger than the diameter of the second pipe section, the outer diameter of the first one-way valve 7 is smaller than the diameter of the fourth pipe section and larger than the diameter of the third pipe section, ensuring that the hydraulic oil can only flow from the oil storage tank 22 to the main installation cavity 21, preventing the backflow of the hydraulic oil, thereby ensuring the stability of the tool assembly 4 after opening, so as to facilitate the slitting operation.

[0042] like Figure 4 As shown, a third oil circuit 13 is arranged on the base 1 at intervals, a first end of the third oil circuit 13 is connected to the main installation cavity 21, a second end of the third oil circuit 13 is connected to the oil storage tank 22, the third oil circuit 13 includes a fifth pipe segment and a sixth pipe segment connected to each other, the fifth pipe segment is located at one end of the sixth pipe segment close to the main installation cavity 21, and the diameter of the fifth pipe segment is smaller than the diameter of the sixth pipe segment; the directional slitting device includes a third one-way valve 9, and the third one-way valve 9 is located in the sixth pipe segment.

[0043] In this way, the setting of the third oil circuit 13 provides a corresponding flow path for the hydraulic oil to flow from the main installation cavity 21 to the oil storage tank 22. The first oil circuit 11 and the second oil circuit 12 are only used to make the hydraulic oil flow from the oil storage tank 22 to the main installation cavity 21. The third oil circuit 13 is only used to make the hydraulic oil flow from the main installation cavity 21 to the oil storage tank 22, thereby ensuring the singleness and exclusivity of the functions of each oil circuit.

[0044] Specifically, the third one-way valve 9 is a sphere, and the directional slitting device includes a pressure relief screw 10, which is rotatably arranged on the base 1. The threaded end of the pressure relief screw 10 abuts against or separates from the third one-way valve 9, so that the third one-way valve 9 blocks the connecting port between the fifth pipe segment and the sixth pipe segment or the third one-way valve 9 avoids the hydraulic oil flowing from the fifth pipe segment to the sixth pipe segment.

[0045] In this way, by setting the pressure relief screw 10, the operator can control the connection and disconnection between the fifth pipe section and the sixth pipe section of the third oil circuit 13 according to actual needs, so as to control the time for the hydraulic oil to flow from the main mounting chamber 21 to the oil storage tank 22, thereby achieving control of the retraction time of the tool 42 of the tool assembly 4.

[0046] like Figure 1 , Figure 3 and Figure 4 As shown, the directional slitting device includes a handle 20, which is drivingly connected to the auxiliary piston 6 to drive the auxiliary piston 6 to slide.

[0047] In this way, by providing the handle 20, the driving operation of the auxiliary piston 6 is made more convenient and the accuracy of the operation is improved.

[0048] like Figure 3 As shown, the tool 42 includes two tool bodies 421 arranged opposite to each other and two connecting rods 422 arranged opposite to each other, and the two tool bodies 421 are arranged correspondingly to the two connecting rods 422; the first end of each tool body 421 is hinged to the fixing member 41, and the second end of each tool body 421 is a free end; the first end of each connecting rod 422 is hinged to the middle part of the corresponding tool body 421, and the second end of each connecting rod 422 is hinged to the fixing member 41 and is slidably arranged relative to the fixing member 41 along the sliding direction of the main piston 3; the main piston 3 is drivingly connected to the second end of each connecting rod 422 to drive the corresponding tool body 421 to move through each connecting rod 422.

[0049] like Figure 3 As shown, the fixing member 41 is provided with a guide groove 411 for guiding the second end of each connecting rod 422 , and the guide groove 411 extends along the sliding direction of the main piston 3 .

[0050] In this way, the setting of the guide groove 411 plays a guiding and limiting role in the movement of the second end of each connecting rod 422, ensuring the stability of the movement trajectory of each connecting rod 422, improving the reliability of the movement of each knife body 421, and ensuring the accuracy of the unfolded state of each knife body 421.

[0051] like Figure 3As shown, a top plate 23 is provided at one end of the main sleeve 2 away from the base 1, and a fixing member 41 is located in the main installation cavity 21 and fixedly connected to the top plate 23; a bypass opening 24 for avoiding the movement of the tool 42 is provided on the side wall of the main sleeve 2, and the tool 42 has an open state extending out of the main sleeve 2 and a contracted state retracted into the main sleeve 2. In this way, the normal movement of the tool assembly 4 is ensured.

[0052] like Figure 2 and Figure 3 As shown, an observation opening 25 is provided on the side wall of the main sleeve 2 for observing the real-time position of the main piston 3 .

[0053] like Figure 2 and Figure 3 As shown, the directional slitting device includes a scale 30, which is arranged at the observation opening 25 to display the real-time height size of the main piston 3; and / or the number of the observation openings 25 is multiple, and the multiple observation openings 25 are arranged at circumferential intervals around the main sleeve 2.

[0054] In this way, by setting the observation opening 25 and the scale 30, the operator can monitor the movement of the main piston 3 in real time, so as to judge the opening degree of the tool assembly 4. It is suitable for the scene that needs to accurately judge the cutting size of the directional cutting device, and is suitable for the scene that needs all-round monitoring.

[0055] The operation process of the directional slitting device of the utility model is as follows:

[0056] (1) Before the slitting begins, the operator lifts the auxiliary piston 6 by lifting the handle 20, so that the hydraulic oil in the oil storage tank 22 passes through the second oil path 12 and the second one-way valve 8 therein and enters the auxiliary installation chamber 51, and then presses down the handle 20 to press down the auxiliary piston 6, so that the hydraulic oil in the auxiliary installation chamber 51 passes through the first oil path 11 and the first one-way valve 7 therein and enters the main installation chamber 21, so as to push the main piston 3 up, so that the tool 42 of the tool assembly 4 opens, and the slitting requirements are met. In addition, the movement of the main piston 3 can be observed through the opening 25 and the scale 30 to determine whether the tool 42 is fully opened, so as to determine whether the slitting is completed.

[0057] (2) The operator can judge whether the cutter 42 is fully opened by observing the movement of the main piston 3 through the opening 25 and the scale 30, so as to judge whether the slitting is completed. After the slitting is completed, the pressure relief screw 10 is opened to allow the hydraulic oil in the main installation chamber 21 to enter the oil storage tank 22 through the third oil path 13 and the third one-way valve 9 therein, so that the cutter 42 of the cutter assembly 4 is retracted.

[0058] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0059] The utility model comprises a directional slitting device, comprising: a base 1, the base 1 being arranged on a supporting base surface, the base 1 being provided with a first oil circuit 11 and a second oil circuit 12 at intervals; a main sleeve 2 and a main piston 3, the main sleeve 2 being arranged on the base 1, the main sleeve 2 being provided with a main mounting cavity 21 and an oil storage tank 22 at intervals from the main mounting cavity 21, the first end of the first oil circuit 11 being communicated with the main mounting cavity 21, the first end of the second oil circuit 12 being communicated with the oil storage tank 22, the main piston 3 being slidably arranged in the main mounting cavity 21 in a direction approaching or moving away from the base 1; a tool assembly 4, the tool assembly 4 comprising a fixing member 41 and a fixing member 42 being movably arranged on the fixing member 41. The tool 42 of the fixed part 41, the fixed part 41 is installed on the main sleeve 2, and the main piston 3 is driven and connected to the tool 42 to drive the tool 42 to open or contract relative to the fixed part 41; the auxiliary sleeve 5 and the auxiliary piston 6, the auxiliary sleeve 5 is arranged on the base 1, and the auxiliary sleeve 5 is provided with an auxiliary installation cavity 51, the second end of the first oil circuit 11 and the second end of the second oil circuit 12 are both connected to the auxiliary installation cavity 51, and the auxiliary piston 6 is slidably arranged in the auxiliary installation cavity 51 in the direction close to or away from the base 1, so that the hydraulic oil flows from the oil storage tank 22 to the main installation cavity 21, so as to drive the main piston 3 to slide in the direction away from the base 1. In this way, the directional slitting device of the utility model realizes the telescopic slitting process of the tool 42 by hydraulic drive, so that the directional slitting device can provide a more stable and precise slitting effect, and proposes an accurate and low-cost slitting method, which reduces the preparation of a large number of specimen molds and can efficiently perform slitting. Compared with the directional slitting method in the prior art, it is more convenient, safer, and has lower cost, and solves the problem of low precision of slitting of specimens in large-size directional hydraulic fracturing experiments in the prior art due to manual cutting.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0062] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0065] The above description is only the preferred embodiment of the utility model, and is 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 principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A directional slitting device, characterized in that: include: A base (1), the base (1) being arranged on a supporting base surface, and a first oil passage (11) and a second oil passage (12) being arranged on the base (1) at intervals; A main sleeve (2) and a main piston (3), wherein the main sleeve (2) is arranged on the base (1), a main installation cavity (21) and an oil storage tank (22) are arranged on the main sleeve (2) at intervals, a first end of the first oil path (11) is connected to the main installation cavity (21), a first end of the second oil path (12) is connected to the oil storage tank (22), and the main piston (3) is slidably arranged in the main installation cavity (21) in a direction approaching or moving away from the base (1); A tool assembly (4), the tool assembly (4) comprising a fixing member (41) and a tool (42) movably arranged on the fixing member (41), the fixing member (41) being mounted on the main sleeve (2), the main piston (3) being drivingly connected to the tool (42) so as to drive the tool (42) to open or contract relative to the fixing member (41); An auxiliary sleeve (5) and an auxiliary piston (6), wherein the auxiliary sleeve (5) is arranged on the base (1), an auxiliary installation cavity (51) is arranged on the auxiliary sleeve (5), the second end of the first oil circuit (11) and the second end of the second oil circuit (12) are both connected to the auxiliary installation cavity (51), and the auxiliary piston (6) is slidably arranged in the auxiliary installation cavity (51) in a direction approaching or moving away from the base (1), so that the hydraulic oil flows from the oil storage tank (22) to the main installation cavity (21), so as to drive the main piston (3) to slide in a direction away from the base (1).

2. The directional slitting device according to claim 1, characterized in that: The directional slitting device comprises: a first one-way valve (7), the first one-way valve (7) being arranged in the first oil circuit (11), the first oil circuit (11) comprising a first pipe section and a second pipe section connected to each other, the first pipe section being located at an end of the second pipe section close to the main installation cavity (21), the pipe diameter of the first pipe section being larger than the pipe diameter of the second pipe section, and the first one-way valve (7) being located in the first pipe section; A second one-way valve (8), wherein the second one-way valve (8) is arranged in the second oil circuit (12), the second oil circuit (12) comprises a third pipe section and a fourth pipe section which are connected to each other, the third pipe section is located at one end of the fourth pipe section close to the oil storage tank (22), the pipe diameter of the third pipe section is smaller than the pipe diameter of the fourth pipe section, and the second one-way valve (8) is located in the fourth pipe section.

3. The directional slitting device according to claim 1, characterized in that: A third oil circuit (13) is arranged on the base (1) at intervals, the first end of the third oil circuit (13) is in communication with the main installation cavity (21), the second end of the third oil circuit (13) is in communication with the oil storage tank (22), the third oil circuit (13) comprises a fifth pipe section and a sixth pipe section which are connected to each other, the fifth pipe section is located at one end of the sixth pipe section close to the main installation cavity (21), the diameter of the fifth pipe section is smaller than the diameter of the sixth pipe section; the directional slitting device comprises a third one-way valve (9), the third one-way valve (9) is located in the sixth pipe section.

4. The directional slitting device according to claim 3, characterized in that: The third one-way valve (9) is a sphere, and the directional slitting device comprises a pressure relief screw (10), which is rotatably arranged on the base (1), and the threaded end of the pressure relief screw (10) is in contact with or separated from the third one-way valve (9), so that the third one-way valve (9) blocks the connection between the fifth pipe section and the sixth pipe section or the third one-way valve (9) avoids the hydraulic oil flowing from the fifth pipe section to the sixth pipe section.

5. The directional slitting device according to claim 1, characterized in that: The directional slitting device comprises a handle (20), and the handle (20) is drivingly connected to the auxiliary piston (6) to drive the auxiliary piston (6) to slide.

6. The directional slitting device according to claim 1, characterized in that: The knife (42) comprises two knife bodies (421) arranged opposite to each other and two connecting rods (422) arranged opposite to each other, wherein the two knife bodies (421) and the two connecting rods (422) are arranged correspondingly; The first end of each of the knife bodies (421) is hinged to the fixing member (41), and the second end of each of the knife bodies (421) is a free end; The first end of each connecting rod (422) is hinged to the middle part of the corresponding knife body (421), and the second end of each connecting rod (422) is hinged to the fixing member (41) and is slidably arranged relative to the fixing member (41) along the sliding direction of the main piston (3); The main piston (3) is drivingly connected to the second end of each connecting rod (422) so as to drive the corresponding knife body (421) to move through each connecting rod (422).

7. The directional slitting device according to claim 6, characterized in that: The fixing member (41) is provided with a guide groove (411) for guiding the second end of each connecting rod (422), and the guide groove (411) extends along the sliding direction of the main piston (3).

8. The directional slitting device according to any one of claims 1 to 7, characterized in that: A top plate (23) is provided at one end of the main sleeve (2) away from the base (1), and the fixing member (41) is located in the main installation cavity (21) and fixedly connected to the top plate (23); An escape opening (24) is provided on the side wall of the main sleeve (2) for evading the movement of the cutter (42). The cutter (42) has an open state extending out of the main sleeve (2) and a contracted state retracted into the main sleeve (2).

9. The directional slitting device according to any one of claims 1 to 7, characterized in that: An observation opening (25) is provided on the side wall of the main sleeve (2) for observing the real-time position of the main piston (3).

10. The directional slitting device according to claim 9, characterized in that: The directional slitting device comprises a scale (30), and the scale (30) is arranged at the observation opening (25) to display the real-time height size of the main piston (3); and / or The number of the observation openings (25) is plural, and the plurality of observation openings (25) are arranged at intervals in the circumferential direction around the main sleeve (2).

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