Pressurizing device and telescopic stand column

Abstract

The utility model relates to the technical field of hydraulic supports, in particular to a supercharging device and a telescopic stand column. The supercharging device is arranged in a cylinder body of the telescopic stand column and comprises a movable column, a cylinder barrel and a double-head piston. The movable column is movably arranged in the cylinder body, and a pressurization connector is formed at one end of the movable column; the cylinder barrel is fixed in the plunger, and a liquid discharge channel is formed in the cylinder barrel; the double-end piston is movably arranged in the movable column, an annular cavity is formed between the double-end piston and the movable column, and the annular cavity is communicated with the liquid discharging channel. According to the supercharging device and the telescopic stand column, the supercharging device is arranged in the cylinder body of the telescopic stand column, supercharging liquid is input through the supercharging connector, so that the double-end piston is pushed to move, the liquid is conveyed into the cylinder body, the cylinder body is supercharged, a built-in structure is adopted, extra space is not needed, and the supercharging device and the telescopic stand column can be integrally assembled; additional pipelines and control valves are not needed, the oil way design is simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic supports, in particular to a booster device and a telescopic column. Background Art

[0002] The active initial support force of the hydraulic support can improve the support's ability to manage the roof, improve the support's support effect, reduce the amount of column lowering from the active initial support to the constant resistance stage, and reduce the amount of roof settlement before and after the frame is moved. However, due to the lengthy industrial pipelines in the comprehensive mining working face, when the emulsion reaches the liquid support through the liquid supply pipeline, considering the opening pressure of the one-way valve and the throttling pressure loss, the actual pressure reaching the column is lower than the liquid supply pressure, which seriously reduces the active initial support force of the support. Therefore, in order to increase the initial support force of the hydraulic support, it is generally necessary to equip it with a booster device. In the existing technology, an external booster device is generally used, which requires the configuration of a booster cylinder or a booster, which encroaches on the space of the hydraulic support and leads to the problem of a large occupied area; the existing technology has a complex arrangement of pipelines and control valves, and requires many modifications to the existing hydraulic system circuits, resulting in high costs. Utility Model Content

[0003] The utility model provides a boosting device and a telescopic column, which are used to solve the problems in the prior art of external boosting devices encroaching on the space of hydraulic supports, resulting in a large occupied area, complex pipeline and control valve layout, many modifications and high costs.

[0004] The utility model provides a booster device, which is arranged in a cylinder body of a telescopic column, and the booster device includes:

[0005] A piston is movably disposed in the cylinder body, and a pressurizing interface is formed at one end of the piston for introducing pressurized liquid;

[0006] a cylinder barrel, fixed in the piston and formed with a liquid discharge passage, one end of which is in communication with the cylinder body;

[0007] A double-headed piston is movably disposed in the piston, with one end being arranged close to the boost interface and the other end being movably disposed in the cylinder. An annular chamber for accommodating liquid is formed between the double-headed piston and the piston, and the annular chamber is connected to the other end of the discharge channel.

[0008] According to the boosting device provided by the present invention, a cavity is formed inside the cylinder, the other end of the double-headed piston is inserted into the cavity and sealed to form a gas chamber, and an inflation valve is provided in the cylinder for filling the gas chamber with inert gas.

[0009] The boosting device provided by the present invention further includes: a screw plug provided at one end of the cylinder for blocking the gas chamber from the liquid inside the cylinder; and a first sealing member provided for sealing between the screw plug and the cylinder.

[0010] According to the boosting device provided by the utility model, the cylinder is connected to the piston via a thread, and one end of the cylinder is fixedly connected to the piston via a retaining spring.

[0011] According to the boosting device provided by the present invention, a first assembly groove is formed on the outer wall of one end of the double-headed piston, and a second assembly groove is formed on the outer wall of the other end. The boosting device further includes:

[0012] a first guide ring, sealingly disposed between the first assembly groove and the piston;

[0013] The second guide ring is sealed between the second assembly groove and the cylinder.

[0014] According to the boosting device provided by the present invention, a third assembly groove is formed on the outer wall of one end of the double-headed piston, and a fourth assembly groove is formed on the outer wall of the other end. The boosting device further includes:

[0015] a second sealing member, sealingly disposed between the third assembly groove and the piston;

[0016] The third sealing member is sealingly arranged between the fourth assembly groove and the cylinder barrel.

[0017] The boosting device provided by the present invention further includes: a buffer sleeve, which is sleeved on one end of the double-headed piston close to the boosting interface, and the end of the buffer sleeve close to the boosting interface is formed with a tapered structure.

[0018] According to the boosting device provided by the present invention, a fifth assembly groove is formed at one end of the double-headed piston, and the boosting device further comprises: a fourth sealing member, which is sealed between the fifth assembly groove and the buffer sleeve.

[0019] According to the boosting device provided by the present invention, a sixth assembly groove is formed at one end of the double-headed piston, and the boosting device further comprises: a shaft retaining ring, which is arranged between the sixth assembly groove and the buffer sleeve.

[0020] The utility model further provides a telescopic column, comprising: the boosting device in the above embodiment of the utility model.

[0021] The present invention provides a boosting device, which is arranged in the cylinder body of a telescopic column. The boosting device includes: a piston, a cylinder and a double-headed piston. The piston is movably arranged in the cylinder body, and a boosting interface is formed at one end of the piston for introducing a pressurized liquid; the cylinder is fixed in the piston, and a drainage channel is formed, and one end of the drainage channel is connected to the cylinder body; the double-headed piston is movably arranged in the piston, and one end is arranged close to the boosting interface, and the other end is movably arranged in the cylinder, and an annular chamber for accommodating liquid is formed between the double-headed piston and the piston, and the annular chamber is connected to the other end of the drainage channel. The present invention provides a boosting device, which is arranged inside the cylinder body of a telescopic column, and the boosting liquid is input through the boosting interface, thereby pushing the double-headed piston to move, so that the volume of the annular chamber is compressed, and the liquid inside it is transported into the cylinder body through the drainage channel, thereby pressurizing the cylinder body. The booster device of the utility model is arranged inside the cylinder body of the telescopic column, adopts a built-in structure, does not require additional space, and can be integrated with the telescopic column without the need for additional pipelines and control valves, thereby simplifying the oil circuit design and reducing the cost.

[0022] Furthermore, the present invention provides a telescopic column, which includes the boosting device in the above embodiment of the present invention, and therefore has the same advantages as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a structural schematic diagram of a supercharging device provided in one embodiment of the present utility model.

[0025] Figure 2 It is a structural schematic diagram of a telescopic column provided in one embodiment of the present utility model.

[0026] Figure 3 This is a structural diagram of the double telescopic columns provided in one embodiment of the present utility model when they are in the first working state.

[0027] Figure 4 This is a structural diagram of the double telescopic columns provided in one embodiment of the present utility model when they are in the second working state.

[0028] Reference numerals:

[0029] 1. Screw plug; 2. Circlip; 3. Inflating valve; 4. Cylinder; 5. Piston; 6. Double-headed piston; 7. Buffer sleeve; 8. Shaft retaining ring; 9. Fourth seal; 10. First guide ring; 11. Second seal; 12. Second guide ring; 13. Third seal; 14. Air seal; 15. First seal; 16. Pressurization interface; 17. Drain channel; 18. Annular chamber; 19. Gas chamber

[0030] 100. Supercharging device; 200. First cylinder; 300. Second cylinder. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this embodiment.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this embodiment, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0034] In this embodiment, unless otherwise specified or limited, the terms "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] The following combination Figure 1 The present invention describes a pressure boosting device 100 , which is arranged in a cylinder of a telescopic column.

[0037] The boosting device 100 includes a piston 5 , a cylinder 4 and a double-headed piston 6 .

[0038] Among them, the piston 5 is movably arranged in the cylinder body, and a boost interface 16 is formed at one end of the piston 5 for introducing pressurized liquid; the cylinder barrel 4 is fixed in the piston 5, and a drainage channel 17 is formed, and one end of the drainage channel 17 is connected to the cylinder body; the double-headed piston 6 is movably arranged in the piston 5, and one end is arranged close to the boost interface 16, and the other end is movably arranged in the cylinder barrel 4, and an annular chamber 18 for accommodating liquid is formed between the double-headed piston 6 and the piston 5, and the annular chamber 18 is connected to the other end of the drainage channel 17.

[0039] Specifically, the interior of the cylinder body is a hollow structure, the booster device 100 can be placed in the interior of the cylinder body as a whole, and the piston 5 can extend from the interior of the cylinder body under the push of the liquid in the cylinder body.

[0040] The plunger 5 is also a hollow structure, with the cylinder 4 and the double-headed piston 6 both disposed within the plunger 5. Generally, when the telescopic column is extended, in order to increase pressure within the cylinder, a pressurizing port 16 should be located at the end of the plunger 5 away from the cylinder, and pressurized liquid is fed into the piston to push the double-headed piston 6 to move.

[0041] One end of the cylinder 4 is fixedly connected to the piston 5, and there is no relative movement between the two. The cylinder 4 is also a hollow structure, and is sealed with the double-headed piston 6 to form a gas chamber 19 inside the two, which is filled with an inert gas, as described in detail in the following embodiments.

[0042] The double-headed piston 6 can move within the piston 5 and the cylinder 4, with one end of the piston placed inside the piston 5 and the other end placed inside the cylinder 4. The double-headed piston 6 moves under the push of the pressurized liquid. The movement of the double-headed piston 6 causes the volume of the annular chamber 18 between it and the piston 5 to change, and the liquid is transported into the cylinder through the discharge channel 17 to pressurize the cylinder.

[0043] It should be understood that the double-headed piston 6 has working surfaces in both directions, that is, piston heads in both directions, allowing bidirectional operation within a single cylinder and generating force in both directions. Based on size, the piston head located within the plunger 5 is a large-headed piston, while the piston head located within the cylinder 4 is a small-headed piston.

[0044] The boosting process of the boosting device 100 of the present invention is as follows:

[0045] When the boosting liquid is introduced into the boosting interface 16, the double-headed piston 6 moves toward the cylinder body under the push of the boosting liquid, causing the volume of the annular chamber 18 to be compressed, and the internal liquid is transported into the cylinder body through the discharge channel 17, thereby pressurizing the cylinder body.

[0046] As can be seen, the present invention provides a booster device 100, which is disposed within the cylinder of the telescopic column. Pressurized liquid is input through the booster port 16, thereby moving the double-headed piston 6, compressing the annular chamber 18 and transferring the liquid therein into the cylinder through the drain channel 17, thereby boosting the cylinder pressure. The present invention's booster device 100 is disposed within the cylinder of the telescopic column, employing a built-in structure that requires no additional space and can be integrated with the telescopic column, eliminating the need for additional piping and control valves. This simplifies the oil circuit design and reduces costs.

[0047] In one embodiment of the present invention, a cavity is formed within the cylinder 4, and the other end of the double-headed piston 6 is inserted into the cavity and sealed to form a gas chamber 19. A charging valve 3 is provided within the cylinder 4 for charging the gas chamber 19 with an inert gas. The cylinder 4 forms a cavity that is sealed to the other end of the double-headed piston 6, forming the gas chamber 19. An inert gas, such as nitrogen or helium, is introduced into the gas chamber 19 through the charging valve 3. When the pressurized liquid pushes the double-headed piston 6 to move, it must simultaneously overcome the air pressure within the gas chamber 19. When the pressurized liquid returns, the double-headed piston 6 returns to its original position due to the pressure of the compressed gas in the gas chamber 19 and the liquid within the cylinder.

[0048] In one embodiment of the present invention, the booster device 100 further includes a plug 1 and a first seal 15. The plug 1 is located at one end of the cylinder 4, isolating the gas chamber 19 from the liquid within the cylinder; the first seal 15 is provided between the plug 1 and the cylinder 4. In this embodiment, the plug 1 and the first seal 15 separate the gas chamber 19 within the cylinder 4 from the liquid within the cylinder, ensuring a tight seal between the inert gas and the liquid within the cylinder, preventing gas-liquid mixing and contamination of the liquid.

[0049] In one embodiment of the present invention, the cylinder 4 is connected to the plunger 5 via threads, and a retaining spring 2 is provided at one end of the cylinder 4 to secure the plunger 5. Specifically, the plunger 5 has internal threads, and the cylinder 4 has external threads. These threads are connected, and a retaining spring 2 is provided at each end to secure the cylinder 4 and plunger 5. Preferably, the cylinder 4 and plunger 5 are connected via rectangular threads and secured with a heavy-duty retaining spring 2.

[0050] In one embodiment of the present invention, a first mounting groove is formed on the outer wall of one end of the double-headed piston 6, and a second mounting groove is formed on the outer wall of the other end. The booster device 100 also includes a first guide ring 10 and a second guide ring 12. The first guide ring 10 is sealed between the first mounting groove and the piston 5; the second guide ring 12 is sealed between the second mounting groove and the cylinder 4. Specifically, mounting grooves are machined at each end of the double-headed piston 6. By placing guide rings in the mounting grooves, the guide rings provide guidance and support for the double-headed piston 6, ensuring that the double-headed piston 6 is centered and moves axially.

[0051] In one embodiment of the present invention, a third assembly groove is formed on the outer wall of one end of the double-headed piston 6, and a fourth assembly groove is formed on the outer wall of the other end. The boosting device 100 also includes: a second seal 11 and a third seal 13. The second seal 11 is sealed between the third assembly groove and the piston 5; the third seal 13 is sealed between the fourth assembly groove and the cylinder 4. Since both ends of the double-headed piston 6 are working surfaces, both ends need to be sealed. Specifically, assembly grooves are respectively processed at both ends of the double-headed piston 6, and by arranging seals in the assembly grooves, a sealed connection between the double-headed piston 6 and the cylinder 4 and the piston 5 is achieved. The above-mentioned second seal 11 and third seal 13 can be in the form of a combined seal, which seals the high-pressure liquid, and preferably adopts a thickened retaining ring piston assembly, etc.; an air seal 14 is formed between the double-headed piston 6 and the cylinder 4 to seal the nitrogen.

[0052] In one of the embodiments of the utility model, the pressure boosting device 100 further comprises: a buffer sleeve 7 sleeved on one end of the double-headed piston 6 close to the pressure boosting interface 16, and one end of the buffer sleeve 7 close to the pressure boosting interface 16 is formed with a tapered structure. Specifically, when the pressure boosting liquid returns, under the action of inert gas pressure and liquid pressure in the cylinder, the double-headed piston 6 returns to the original position and may collide with the live column 5, therefore, the buffer sleeve 7 is installed on one end of the double-headed piston 6 close to the pressure boosting interface 16, and when the double-headed piston 6 moves back to the original position, the buffer sleeve 7 is in contact with the live column 5, thereby avoiding damage to the double-headed piston 6. On the other hand, one end of the buffer sleeve 7 close to the pressure boosting interface 16 is a tapered structure, which changes the liquid passage annular area between the buffer sleeve 7 and the live column 5, thereby forming throttling and further playing a buffering role.

[0053] In one of the embodiments of the utility model, one end of the double-headed piston 6 is formed with a fifth assembly groove, and the pressure boosting device 100 further comprises: a fourth sealing piece 9 sealingly arranged between the fifth assembly groove and the buffer sleeve 7, for sealing the buffer sleeve 7, so as to prevent liquid from entering the buffer sleeve 7.

[0054] In one of the embodiments of the utility model, one end of the double-headed piston 6 is formed with a sixth assembly groove, and the pressure boosting device 100 further comprises: a shaft check ring 8 arranged between the sixth assembly groove and the buffer sleeve 7, and the buffer sleeve 7 is fixed to one end of the double-headed piston 6 through the shaft check ring 8.

[0055] As shown in the structure, Figures 2 to 4 The utility model also provides a telescopic stand.

[0056] The telescopic stand provided by the utility model comprises the pressure boosting device 100 in the above-mentioned embodiments of the utility model, and therefore has the same advantages as above.

[0057] As shown in the structure, Figure 2 The pressure boosting device 100 in the embodiments of the utility model can be applied to a double telescopic stand, the double telescopic stand comprises a first cylinder 200, a second cylinder 300 and the pressure boosting device 100 in the above-mentioned embodiments of the utility model, the second cylinder 300 is movably arranged in the first cylinder 200, and the pressure boosting device 100 is movably arranged in the second cylinder 300.

[0058] The working process of the double telescopic stand comprises two working states: when in the first working state, a liquid supply device supplies liquid into the double telescopic stand, the second cylinder 300 and the live column 5 are simultaneously extended, that is, as shown in the structure; Figure 3 When in the second working state, the liquid supply device supplies liquid to the pressure boosting interface 16, forces the double-headed piston 6 to move, and delivers liquid to the second cylinder 300 through the liquid discharge channel 17, thereby realizing pressure boosting of the stand, that is, as shown in the structure; Figure 4 When in the second working state, the liquid supply device supplies liquid to the pressure boosting interface 16, forces the double-headed piston 6 to move, and delivers liquid to the second cylinder 300 through the liquid discharge channel 17, thereby realizing pressure boosting of the stand, that is, as shown in the structure;

[0059] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art can understand and implement the present invention without inventive effort.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A boosting device, characterized in that: The booster device is provided in the cylinder of the telescopic column and includes: A piston (5) is movably arranged in the cylinder body, and a pressurizing interface (16) is formed at one end of the piston (5) for introducing pressurized liquid; A cylinder barrel (4) is fixed in the piston (5) and is formed with a drainage channel (17), one end of which is in communication with the cylinder body; A double-headed piston (6) is movably disposed in the piston (5), with one end being disposed close to the boost interface (16) and the other end being movably disposed in the cylinder (4). An annular chamber (18) for accommodating liquid is formed between the double-headed piston (6) and the piston (5), and the annular chamber (18) is communicated with the other end of the discharge channel (17).

2. The boosting device according to claim 1, characterized in that: A cavity is formed inside the cylinder (4), and the other end of the double-headed piston (6) is inserted into the cavity and sealed to form a gas chamber (19). A charging valve (3) is provided in the cylinder (4) for charging inert gas into the gas chamber (19).

3. The boosting device according to claim 2, characterized in that: Also includes: A screw plug (1) is provided at one end of the cylinder (4) and is used to block the gas chamber (19) from the liquid inside the cylinder; A first sealing member (15) is provided for sealing between the screw plug (1) and the cylinder (4).

4. The boosting device according to claim 1, characterized in that: The cylinder (4) is connected to the piston (5) via a thread, and one end of the cylinder (4) is fixedly connected to the piston (5) via a retaining spring (2).

5. The boosting device according to claim 1, characterized in that: A first assembly groove is formed on the outer wall of one end of the double-headed piston (6), and a second assembly groove is formed on the outer wall of the other end. The boosting device further includes: A first guide ring (10) is sealingly disposed between the first assembly groove and the piston (5); A second guide ring (12) is sealingly disposed between the second assembly groove and the cylinder (4).

6. The boosting device according to claim 1, characterized in that: A third assembly groove is formed on the outer wall of one end of the double-headed piston (6), and a fourth assembly groove is formed on the outer wall of the other end. The boosting device further includes: A second sealing member (11) is provided for sealing between the third assembly groove and the piston (5); A third sealing member (13) is provided between the fourth assembly groove and the cylinder (4) for sealing.

7. The supercharging device according to any one of claims 1 to 6, characterized in that: Also includes: The buffer sleeve (7) is sleeved on one end of the double-headed piston (6) close to the boost interface (16), and the end of the buffer sleeve (7) close to the boost interface (16) is formed with a conical structure.

8. The boosting device according to claim 7, characterized in that: A fifth assembly groove is formed at one end of the double-headed piston (6), and the boosting device further comprises: a fourth sealing member (9) which is sealed between the fifth assembly groove and the buffer sleeve (7).

9. The boosting device according to claim 7, characterized in that: A sixth assembly groove is formed at one end of the double-headed piston (6), and the booster device further comprises a shaft retaining ring (8) disposed between the sixth assembly groove and the buffer sleeve (7).

10. A telescopic column, characterized in that: include: The boosting device according to any one of claims 1 to 9.

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