High-strength spring sealing type mining jack

Abstract

The utility model discloses a high-strength spring sealing type mining jack, and belongs to the technical field of jacks, and the high-strength spring sealing type mining jack is characterized in that the high-strength spring sealing type mining jack comprises a hydraulic cylinder body which comprises a liquid storage cavity used for storing hydraulic oil and a control mechanism used for controlling the hydraulic oil to flow; the multi-stage piston rod assembly comprises a first piston rod capable of stretching out under the action of hydraulic oil; the safety pin assembly is mounted on the hydraulic cylinder body, and the safety pin assembly comprises a pin shaft body; wherein the first piston rod is provided with a plurality of first hole grooves which are uniformly distributed, and the pin shaft body can be inserted into the first hole grooves. The use stability of the jack can be improved.

Description

Technical Field

[0001] This application belongs to the field of jack technology, and in particular relates to a high-strength spring-sealed mining jack. Background Technology

[0002] During coal mine production operations, workers need to use jacks to help stabilize the roof of the mine roadways to prevent collapse accidents in order to ensure the safety of the roadways.

[0003] However, the environment inside mine roadways is complex, and collisions can easily cause oil leakage in the jacks, leading to contraction of the jack's protruding part and its inability to maintain its supporting function. This can reduce safety in mine roadways, so improvements are needed. Utility Model Content

[0004] The purpose of this application is to address the aforementioned technical problems by providing a high-strength spring-sealed mining jack that can improve the stability of the jack in use.

[0005] This application provides a high-strength spring-sealed mining jack, comprising:

[0006] A hydraulic cylinder body, including a reservoir for storing hydraulic oil and a control mechanism for controlling the flow of hydraulic oil;

[0007] A multi-stage piston rod assembly, including a first piston rod that can extend under the action of hydraulic oil;

[0008] A safety pin assembly, mounted on a hydraulic cylinder body, the safety pin assembly including a pin shaft body;

[0009] The first piston rod is provided with several evenly distributed first slots, and the pin body can be inserted into the first slots.

[0010] The reservoir stores hydraulic oil. By controlling the flow of hydraulic oil, it acts on the multi-stage piston rod assembly, causing the first piston rod to extend from the hydraulic cylinder body to provide support. When the first piston rod extends to the required position, it is inserted into the first slot through the pin of the safety pin assembly, connecting the pin between the safety pin assembly and the first piston rod. This ensures that when the hydraulic cylinder body is subjected to impact or other circumstances that cause internal hydraulic oil leakage, the first piston rod can stably maintain its original support performance, improving the safety of continuous use.

[0011] Furthermore, the control mechanism includes:

[0012] lever;

[0013] The first hydraulic chamber is connected to the liquid storage chamber via a liquid flow channel;

[0014] The piston body is movably placed in the first hydraulic chamber, and the piston body is movably connected to the lever.

[0015] The lever can rotate around a hinge axis, and the piston body is placed in the first hydraulic chamber for extension and retraction through the lever. When the piston body extends out of the first hydraulic chamber, the hydraulic oil in the reservoir is delivered to the first hydraulic chamber. The lever passes through the piston body and has a gap between it and the piston body, which can ensure the relative movement between the lever and the piston body when the lever moves.

[0016] Furthermore, the control mechanism also includes:

[0017] The second hydraulic chamber is connected to the multi-stage piston rod assembly and is connected to the first hydraulic chamber through a fluid flow channel.

[0018] The second hydraulic chamber corresponds to the multi-stage piston rod assembly. When the piston body retracts into the first hydraulic chamber, it delivers the hydraulic oil in the first hydraulic chamber to the second hydraulic chamber.

[0019] Furthermore, the control mechanism also includes:

[0020] One-way valves are respectively placed in the fluid flow channel between the first hydraulic chamber and the reservoir chamber, and in the fluid flow channel between the second hydraulic chamber and the first hydraulic chamber;

[0021] The release valve is located between the reservoir chamber and the second hydraulic chamber.

[0022] The hydraulic oil is controlled by a check valve to flow from the reservoir to the first hydraulic chamber through the fluid flow channel. The hydraulic oil in the first hydraulic chamber can only flow to the second hydraulic chamber. The hydraulic oil in the textile equipment flows backward. The pressure relief valve allows the hydraulic oil in the second hydraulic chamber to flow to the reservoir, which facilitates the contraction of the multi-stage piston rod assembly.

[0023] Furthermore, the multi-stage piston rod assembly also includes:

[0024] The second piston rod is movably positioned between the hydraulic cylinder and the first piston rod;

[0025] Compression springs are respectively placed between the second piston rod and the hydraulic cylinder body, and between the first piston rod and the second piston rod.

[0026] The second piston rod is movably connected to the hydraulic cylinder and the first piston rod. The multi-stage piston rod allows the jack to have a larger ejection stroke. When the multi-stage piston rod assembly needs to retract after extending, the compression spring acts between the second piston rod and the hydraulic cylinder, as well as between the first piston rod and the second piston rod, causing the first piston rod and the second piston rod to retract.

[0027] Furthermore, the safety pin assembly includes:

[0028] The first set of seats is threadedly connected to the hydraulic cylinder body;

[0029] The second seat is threadedly connected to the second piston rod;

[0030] Both the first and second sleeves are provided with through holes corresponding to the pin body.

[0031] The first and second sockets are connected to the pin body, enabling the pin body to connect the first and second slots with the corresponding through holes, thereby restricting the axial movement of the first and second piston rods.

[0032] Furthermore, it also includes:

[0033] The bushing is provided with threaded connections to the hydraulic cylinder body and the second piston rod, and is used to limit the travel of the first piston rod and the second piston rod.

[0034] The hydraulic cylinder body, the second piston rod, and the corresponding bushing are threaded together, which facilitates the installation of the first piston rod and the second piston rod and ensures the structural stability after installation. At the same time, it limits the stroke of the first piston rod and the second piston rod during extension and retraction, further improving the stability during use.

[0035] Furthermore, it also includes:

[0036] Spring seals are respectively installed on the first piston rod, the second piston rod, and the piston body.

[0037] The spring seal ring adopts a conventional structure available on the market, consisting of a polymer sealing shell and a corrosion-resistant stainless steel metal spring. The spring seal ring ensures high sealing performance in both low-pressure and high-pressure chambers, guaranteeing the stability of the jack's use.

[0038] The beneficial effects of this application are:

[0039] 1. Connect the pin shaft between the safety pin assembly and the first piston rod so that when the hydraulic cylinder body is subjected to an impact or other circumstances that cause internal hydraulic oil leakage.

[0040] 2. The sleeve is connected to the external thread of the hydraulic cylinder body through a threaded connection, which allows the sleeve to be adjusted so that the through hole corresponds to the adjacent first hole groove.

[0041] 3. The spring sealing ring ensures high sealing performance in both low-pressure and high-pressure chambers, guaranteeing the stability of the jack in use. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the jack structure of this application;

[0043] Figure 2 This is a schematic diagram of the hydraulic cylinder body of this application;

[0044] In the attached figures, the following labels are used: 100, hydraulic cylinder body; 110, reservoir; 120, control mechanism; 121, lever; 122, first hydraulic chamber; 123, piston body; 124, second hydraulic chamber; 125, check valve; 126, release valve; 200, multi-stage piston rod assembly; 210, first piston rod; 211, first slot; 220, second piston rod; 221, second slot; 230, compression spring; 300, safety pin assembly; 310, pin shaft body; 320, first sleeve; 330, second sleeve; 340, through hole; 400, bushing; 500, spring seal ring. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0046] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] The embodiments of this application are described in detail below with reference to the accompanying drawings, through specific examples and application scenarios.

[0048] Example 1:

[0049] like Figure 1 , Figure 2 As shown, this application provides a high-strength spring-sealed mining jack, comprising:

[0050] The hydraulic cylinder body 100 includes a reservoir 110 for storing hydraulic oil and a control mechanism 120 for controlling the flow of hydraulic oil.

[0051] The multi-stage piston rod assembly 200 includes a first piston rod 210 that can extend under the action of hydraulic oil;

[0052] A safety pin assembly 300 is mounted on a hydraulic cylinder body 100, and the safety pin assembly 300 includes a pin shaft body 310;

[0053] The first piston rod 210 is provided with a plurality of evenly distributed first slots 211, and the pin body 310 can be inserted into the first slots 211.

[0054] The reservoir 110 stores hydraulic oil. By controlling the flow of hydraulic oil, it acts on the multi-stage piston rod assembly 200, causing the first piston rod 210 to extend from the hydraulic cylinder 100 to provide support. When the first piston rod 210 extends to the required position, it is inserted into the first slot 211 via the pin 310 of the safety pin assembly 300. The pin 310 connects the safety pin assembly 300 and the first piston rod 210, so that when the hydraulic cylinder 100 is subjected to an impact or other circumstances that cause internal hydraulic oil leakage, the first piston rod 210 can stably maintain its original support performance, improving the safety of continuous use.

[0055] Furthermore, the control mechanism 120 includes:

[0056] Leverage 121;

[0057] The first hydraulic chamber 122 is connected to the liquid storage chamber 110 through a liquid flow channel;

[0058] The piston body 123 is movably placed in the first hydraulic chamber 122, and the piston body 123 is movably connected to the lever 121.

[0059] The lever 121 can rotate about a hinge axis, and the piston body 123 is placed in the first hydraulic chamber 122 for extension and retraction through the lever 121. When the piston body 123 extends out of the first hydraulic chamber 122, the hydraulic oil in the reservoir 110 is delivered to the first hydraulic chamber 122. The lever 121 passes through the piston body 123 and has a gap between it and the piston body 123, which can ensure the relative movement between the lever 121 and the piston body 123 when the lever 121 moves.

[0060] Furthermore, the control mechanism 120 also includes:

[0061] The second hydraulic chamber 124 is connected to the multi-stage piston rod assembly 200 and is connected to the first hydraulic chamber 122 through a fluid flow channel.

[0062] The second hydraulic chamber 124 corresponds to the multi-stage piston rod assembly 200. When the piston body 123 retracts into the first hydraulic chamber 122, the hydraulic oil in the first hydraulic chamber 122 is transported to the second hydraulic chamber 124.

[0063] Furthermore, the control mechanism 120 also includes:

[0064] One-way valve 125 is respectively placed in the fluid flow channel between the first hydraulic chamber 122 and the liquid storage chamber 110 and in the fluid flow channel between the second hydraulic chamber 124 and the first hydraulic chamber 122.

[0065] The release valve 126 is located between the liquid storage chamber 110 and the second hydraulic chamber 124.

[0066] The hydraulic oil is controlled by the one-way valve 125 to flow from the reservoir 110 to the first hydraulic chamber 122 through the fluid flow channel. The hydraulic oil in the first hydraulic chamber 122 can only flow to the second hydraulic chamber 124. The hydraulic oil in the textile is reversed. The pressure relief valve can make the hydraulic oil in the second hydraulic chamber 124 flow to the reservoir 110, which facilitates the retraction of the multi-stage piston rod assembly 200.

[0067] Furthermore, the multi-stage piston rod assembly 200 also includes:

[0068] The second piston rod 220 is movably positioned between the hydraulic cylinder body 100 and the first piston rod 210;

[0069] Compression springs 230 are respectively placed between the second piston rod 220 and the hydraulic cylinder 100, and between the first piston rod 210 and the second piston rod 220.

[0070] The second piston rod 220 is movably connected to the hydraulic cylinder 100 and the first piston rod 210. The multi-stage piston rod allows the jack to have a larger ejection stroke. When the multi-stage piston rod assembly 200 needs to retract after extending, the compression spring 230 acts between the second piston rod 220 and the hydraulic cylinder 100, and between the first piston rod 210 and the second piston rod 220, causing the first piston rod 210 and the second piston rod 220 to retract.

[0071] Furthermore, the safety pin assembly 300 includes:

[0072] The first set of seats is 320, and the threaded connection is to the hydraulic cylinder body 100;

[0073] The second seat 330 is threadedly connected to the second piston rod 220;

[0074] The first sleeve 320 and the second sleeve 330 are both provided with through holes 340 corresponding to the pin body 310.

[0075] The first socket 320 and the second socket 330 are connected to the pin body 310, so that the pin body 310 can connect the first slot 211, the second slot 221 and the corresponding through hole 340, thereby restricting the axial movement of the first piston rod 210 and the second piston rod 220.

[0076] Example 2:

[0077] like Figure 2 As shown, this application embodiment provides a high-strength spring-sealed mining jack, which, in addition to the above-mentioned technical features, further includes:

[0078] The bushing 400 is provided with threaded connections to the hydraulic cylinder 100 and the second piston rod 220 respectively, and is used to limit the travel of the first piston rod 210 and the second piston rod 220.

[0079] The hydraulic cylinder body 100, the second piston rod 220, and the corresponding bushing 400 are threaded together, which facilitates the installation of the first piston rod 210 and the second piston rod 220 and the structural stability after installation. At the same time, it is used to limit the stroke of the first piston rod 210 and the second piston rod 220 during extension and retraction, further improving the stability during use.

[0080] Furthermore, it also includes:

[0081] Spring seals 500 are respectively installed on the first piston rod 210, the second piston rod 220, and the piston body 123.

[0082] The Spring Seal Ring 500 adopts a conventional structure available on the market, consisting of a polymer material sealing shell and a corrosion-resistant stainless steel metal spring. The Spring Seal Ring 500 ensures high sealing performance in both low-pressure and high-pressure chambers, guaranteeing the stability of the jack's operation.

[0083] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0084] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A high strength spring sealed mine jack characterized in that, The hydraulic cylinder (100) comprises a storage cavity (110) for storing hydraulic oil and a control mechanism (120) for controlling the flow of hydraulic oil. The multi-stage piston rod assembly (200) comprises a first piston rod (210) capable of being extended under the action of hydraulic oil. The safety pin assembly (300) is installed on the hydraulic cylinder (100), and the safety pin assembly (300) comprises a pin shaft body (310). The first piston rod (210) is provided with a plurality of uniformly distributed first holes (211), and the pin shaft body (310) can be inserted into the first holes (211). The control mechanism (120) comprises:

2. The high strength spring sealed mine jack of claim 1, wherein, A lever (121); A first hydraulic cavity (122) connected with the storage cavity (110) through a liquid flow channel; A piston body (123) movably arranged in the first hydraulic cavity (122), and the piston body (123) is movably connected with the lever (121). The control mechanism (120) further comprises:

3. The high strength spring sealed mine jack of claim 2, wherein, A second hydraulic cavity (124) connected with the multi-stage piston rod assembly (200) and connected with the first hydraulic cavity (122) through a liquid flow channel. The control mechanism (120) further comprises:

4. The high strength spring sealed mine jack of claim 3, wherein, A one-way valve (125) arranged in the liquid flow channel between the first hydraulic cavity (122) and the storage cavity (110) and the liquid flow channel between the second hydraulic cavity (124) and the first hydraulic cavity (122); A release valve (126) arranged between the storage cavity (110) and the second hydraulic cavity (124). The multi-stage piston rod assembly (200) further comprises:

5. The high strength spring sealed mine jack of claim 4, wherein, A second piston rod (220) movably arranged between the hydraulic cylinder (100) and the first piston rod (210), and the second piston rod (220) is provided with a second hole (221) corresponding to the pin shaft body (310); Compression springs (230) arranged between the second piston rod (220) and the hydraulic cylinder (100) and arranged between the first piston rod (210) and the second piston rod (220). The safety pin assembly (300) comprises:

6. The high strength spring sealed mine jack of claim 5, wherein, A first sleeve (320) threadedly connected with the hydraulic cylinder (100); A second sleeve (330) threadedly connected with the second piston rod (220); The first sleeve (320) and the second sleeve (330) are both provided with through holes (340) corresponding to the pin shaft body (310). Further comprising:

7. The high strength spring sealed mine jack of claim 6, wherein, A bushing assembly (400) provided with threads connected with the hydraulic cylinder (100) and the second piston rod (220), respectively, and used for limiting the movement stroke of the first piston rod (210) and the second piston rod (220). Further comprising:

8. The high strength spring sealed mine jack of claim 7, wherein, Spring sealing rings (500) arranged on the first piston rod (210), the second piston rod (220), and the piston body (123), respectively. ​

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