Mining hydraulic jack with buffer devices at two ends

Abstract

The utility model relates to the field of hydraulic supporting and buffering, in particular to a mining hydraulic jack with buffering devices at two ends, which comprises a placing box, a jack shell, a piston column, a plurality of spring buffering devices and a supporting plate, a pressurizing buffer cylinder is arranged on the side surface of a jack shell, a connecting hole with a connecting valve is arranged between the pressurizing buffer cylinder and the pressurizing buffer cylinder, a buffer piston is arranged in the pressurizing buffer cylinder, a vacuum pump is arranged above the pressurizing buffer cylinder, and an oil tank and a pump body are arranged in a containing box and connected with the pressurizing buffer cylinder and the pump body through a first connecting pipe and a second connecting pipe respectively. The spring buffering device is provided with a sleeve, a spring, a bearing plate and a supporting rod, a pressure release valve is arranged above the pressurizing buffering cylinder, a first valve and a second valve are arranged on the first connecting pipe and the third connecting pipe respectively, and the base is made of honeycomb rubber materials. The technical effects of effectively buffering and damping and improving the use safety and stability are achieved.

Description

Technical Field

[0001] This application relates to the field of hydraulic support and buffer technology, and in particular to a mining hydraulic jack with buffer devices at both ends. Background Technology

[0002] In the field of mining equipment, hydraulic jacks are extremely important tools, playing a crucial role in various operational scenarios such as mining and tunnel support. With the continuous expansion of mining scale and the increasing depth, higher demands are placed on the performance and reliability of mining equipment. As vital equipment for supporting and lifting heavy objects, the performance of hydraulic jacks directly affects the safety and efficiency of mining operations. High-quality hydraulic jacks provide stable support for mining operations, ensuring the smooth progress of mining work and promoting the development of the mining industry.

[0003] To meet the needs of supporting and lifting heavy objects in mining operations, traditional mining hydraulic jacks typically focus only on basic lifting functions. Structurally, they generally consist of only basic components such as a base, jack housing, and internal piston rod. Their working principle primarily involves applying pressure to the piston rod through a hydraulic system to achieve the lifting purpose. For buffering functions, conventional methods often employ a single buffer structure, such as a simple rubber pad, relying on the elastic deformation of the rubber to absorb and disperse some of the impact force; or a damper, utilizing the viscous resistance of the damping medium to slow down the movement.

[0004] However, existing mining hydraulic jacks have relatively limited cushioning capabilities, only able to handle smaller impacts. In the complex working environment of mines, when faced with larger impacts, the existing cushioning structures cannot function effectively, easily leading to damage to the jacks, shortening their service life, and potentially causing safety accidents, thus affecting the normal operation of the mine. Utility Model Content

[0005] The purpose of this application is to overcome the technical problem of insufficient buffering in the above-mentioned jacks and to provide a mining hydraulic jack with buffer devices at both ends.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a mining hydraulic jack with buffer devices at both ends, including a base, a placement box above the base, a jack housing above the placement box, a piston column inside the jack housing, several spring buffer devices above the piston column, a support plate above the spring buffer devices, a pressure buffer cylinder on the side surface of the jack housing, a connection hole between the pressure buffer cylinder and the jack housing, a connection valve inside the connection hole, a buffer piston inside the pressure buffer cylinder, a vacuum pump above the pressure buffer cylinder, an oil tank and a pump body inside the placement box, the oil tank and the pressure buffer cylinder being connected by a first connecting pipe, the oil tank and the pump body being connected by a second connecting pipe, and the pump body and the housing being connected by a third connecting pipe.

[0007] By adopting the above technical solutions, the spring buffer device above the piston column can buffer the upward impact force of the jack, protecting the equipment and the load; the pressure buffer cylinder and its internal buffer piston, connecting hole and connecting valve, together with the vacuum pump, can pressurize and buffer the jack, reducing the damage to the equipment caused by pressure changes; a placement box is set on the base to place the oil tank and pump body, making reasonable use of space; the setting of the oil tank, pump body and various connecting pipes can realize the circulation of hydraulic oil and power transmission, ensuring the normal operation of the jack.

[0008] Preferably, the number of spring buffer devices is not less than four.

[0009] By adopting the above technical solution, a placement box is set above the base, and a jack outer shell is set above the placement box. Inside the outer shell is a piston column, and above the piston column are no less than four spring buffer devices. A support plate is set above the spring buffer devices. A pressure buffer cylinder is set on the side surface of the jack outer shell. A connection hole with a connecting valve is provided between the pressure buffer cylinder and the outer shell. A buffer piston is inside the pressure buffer cylinder. A vacuum pump is set above the pressure buffer cylinder. An oil tank and a pump body are inside the placement box. The oil tank is connected to the pressure buffer cylinder through a first connecting pipe, the oil tank is connected to the pump body through a second connecting pipe, and the pump body is connected to the outer shell through a third connecting pipe. This allows the jack to have buffering functions at both ends. The no less than four spring buffer devices can enhance the top buffering effect, disperse pressure, and improve buffering stability.

[0010] Preferably, the spring buffer device includes a sleeve fixedly mounted on the top of the piston column, a spring fixedly mounted at the bottom of the sleeve, a receiving plate mounted above the spring, a support rod mounted above the receiving plate, and the support rod fixedly connected to the support plate.

[0011] By adopting the above technical solution, a placement box and a jack housing are installed above the base. Inside the jack housing is a piston rod, above which is a spring buffer device. Above the spring buffer device is a support plate. A pressure buffer cylinder is located on the side surface of the jack housing. The pressure buffer cylinder is connected to the jack housing through a connection hole with a connecting valve. Inside the pressure buffer cylinder is a buffer piston, and above it is a vacuum pump. The placement box contains an oil tank and a pump body. The oil tank is connected to the pressure buffer cylinder and the pump body through a first connecting pipe and a second connecting pipe, respectively. The pump body is connected to the housing through a third connecting pipe. This achieves the basic functions of a mining hydraulic jack. The spring buffer device includes a sleeve fixed to the top of the piston rod, with a spring at the bottom of the sleeve. Above the spring is a support plate, and above the support plate is a support rod. The support rod is fixedly connected to the support plate, enhancing the buffering effect at the top of the jack, effectively buffering pressure, and protecting the equipment and related components.

[0012] Preferably, a pressure relief valve is provided above the pressurized buffer cylinder.

[0013] By adopting the above technical solution, a placement box is set above the base, and a jack housing is set above the placement box. Inside the housing is a piston column, and above the piston column are several spring buffer devices. Above the spring buffer devices is a support plate. A pressure buffer cylinder is set on the side surface of the jack housing. A connection hole is provided between the pressure buffer cylinder and the jack housing, and a connection valve is provided in the connection hole. A buffer piston is located inside the pressure buffer cylinder, and a vacuum pump is set above the pressure buffer cylinder. An oil tank and a pump body are located inside the placement box. The oil tank and the pressure buffer cylinder are connected by a first connecting pipe, the oil tank and the pump body are connected by a second connecting pipe, and the pump body and the housing are connected by a third connecting pipe. A pressure relief valve is set above the pressure buffer cylinder, which can release pressure when the pressure inside the pressure buffer cylinder is too high, avoiding damage to the equipment due to excessive pressure, and ensuring the normal operation and safe use of the buffer devices at both ends of the mining hydraulic jack.

[0014] Preferably, a first valve is provided on the first connecting pipe.

[0015] By adopting the above technical solution, the mining hydraulic jack is equipped with components such as a base, a placement box, a jack shell, a piston column, a spring buffer device, a support plate, a pressure buffer cylinder, a connecting hole, a connecting valve, a buffer piston, a vacuum pump, an oil tank, and a pump body, which can realize the function of supporting and buffering heavy objects; a first valve is set on the first connecting pipe to control the flow of hydraulic oil between the oil tank and the pressure buffer cylinder, which facilitates the regulation of the working state of the pressure buffer cylinder.

[0016] Preferably, a second valve is provided on the third connecting pipe.

[0017] By adopting the above technical solution, a second valve is installed on the third connecting pipe of the mining hydraulic jack with buffer devices at both ends, which can control the flow of hydraulic oil between the pump body and the outer shell of the jack, making it easier to flexibly adjust the working status of the jack.

[0018] Preferably, the base is made of honeycomb rubber material.

[0019] By adopting the above technical solution, the base is made of honeycomb rubber material, which can effectively enhance the buffering performance of the bottom of the jack, absorb and disperse vibration and impact, and improve the stability and safety of the jack during use.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. Several spring buffer devices are installed above the piston rod, which can effectively absorb and disperse the impact force, improve the jack's buffering capacity, cope with larger impacts, avoid damage to the jack, and extend its service life;

[0022] 2. A pressure buffer cylinder is installed on the side surface of the jack's outer shell to assist in buffering, further enhance the buffering effect, and ensure the safety of mining operations;

[0023] 3. The base is made of honeycomb rubber, which can buffer and absorb shock, reduce the impact of vibration on the jack during operation, and improve its stability. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of the internal structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention and the internal structure of the placement box;

[0027] Figure 3 This utility model Figure 1 Enlarged view of point A;

[0028] In the diagram: 1. Base; 2. Placement box; 3. Jack housing; 4. Piston column; 5. Spring buffer device; 6. Support plate; 7. Pressure buffer cylinder; 8. Connecting hole; 9. Connecting valve; 10. Buffer piston; 11. Vacuum pump; 12. Oil tank; 13. Pump body; 14. First connecting pipe; 15. Second connecting pipe; 16. Third connecting pipe; 17. Sleeve; 18. Spring; 19. Support plate; 20. Support rod; 21. Pressure relief valve; 22. First valve; 23. Second valve. Detailed Implementation

[0029] The technical solutions in the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this utility model, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are also within the protection scope of this utility model.

[0030] This application mainly adopts a scheme of setting buffer devices at both ends of the mining hydraulic jack, which effectively copes with different impact forces and improves the service life and safety of the jack. The following is a further detailed description of this application.

[0031] Example 1

[0032] The mining hydraulic jack with buffer devices at both ends provided in this application embodiment includes a base 1, a placement box 2, a jack housing 3, a piston column 4, spring buffer devices 5, a support plate 6, a pressure buffer cylinder 7, a vacuum pump 11, an oil tank 12, and a pump body 13. The placement box 2 is located above the base 1, and the jack housing 3 is located above the placement box 2. The piston column 4 is located inside the jack housing 3, and several spring buffer devices 5 are located above the piston column 4. The support plate 6 is located above the spring buffer devices 5, and the pressure buffer cylinder 7 is located on the side surface of the jack housing 3. A space is provided between the pressure buffer cylinder 7 and the jack housing 3. A connecting hole 8 is provided, and a connecting valve 9 is installed inside the connecting hole 8. A buffer piston 10 is installed inside the pressure buffer cylinder 7, and a vacuum pump 11 is installed above the pressure buffer cylinder 7. An oil tank 12 and a pump body 13 are installed inside the placement box 2. The oil tank 12 and the pressure buffer cylinder 7 are connected by a first connecting pipe 14, the oil tank 12 and the pump body 13 are connected by a second connecting pipe 15, and the pump body 13 is connected to the jack housing 3 by a third connecting pipe 16. This structural design enables the jack to have buffering functions at both the top and bottom, effectively coping with impact forces of different sizes, and improving the service life and safety of the jack. When the jack is impacted, the spring buffer device 5 and the pressure buffer cylinder 7 can play a buffering role from different aspects. The spring buffer device 5 absorbs part of the impact force by the elastic deformation of the spring, and the pressure buffer cylinder 7 disperses the impact force by the movement of the buffer piston 10 and the flow of hydraulic oil.

[0033] Specifically, the spring buffer device 5 includes a sleeve 17 fixedly mounted on the top of the piston column 4. A spring 18 is fixedly mounted at the bottom of the sleeve 17, a receiving plate 19 is mounted above the spring 18, and a support rod 20 is mounted above the receiving plate 19. The support rod 20 is fixedly connected to the support plate 6. The sleeve 17 is generally made of metal, such as stainless steel, and is usually cylindrical. It can be fixed to the top of the piston column 4 by welding or bolting. The spring 18 can be a helical spring, made of carbon steel or alloy steel, and its elastic coefficient is selected according to the application scenario and load-bearing capacity of the jack. The receiving plate 19 is generally a circular metal plate, which makes good contact with the spring 18 and can smoothly transmit pressure. The support rod 20 is usually a solid metal rod, which can be welded or threaded to the receiving plate 19 and the support plate 6. Alternatively, other types of springs, such as disc springs, can be used in the spring buffer device 5 to replace the helical spring to adapt to different buffering requirements. When subjected to impact, the support plate 6 transmits pressure to the support rod 20, which in turn transmits pressure to the receiving plate 19. The receiving plate 19 compresses the spring 18, which undergoes elastic deformation to absorb the impact force. Then, the spring releases the energy, allowing the device to return to its original state.

[0034] Specifically, the pressure buffer cylinder 7 is generally a cylindrical metal cylinder, made of high-strength alloy steel to withstand greater pressure. The buffer piston 10 is located inside the pressure buffer cylinder 7 and seals against the inner wall of the cylinder. Its material can be a combination of rubber and metal; the rubber part provides a seal, while the metal part ensures strength. The connecting hole 8 connects the pressure buffer cylinder 7 and the jack housing 3. The connecting valve 9 controls the flow of hydraulic oil between the two. The connecting valve 9 can be an electromagnetic control valve for automated control or a manual control valve to meet different operational needs. The vacuum pump 11 is located above the pressure buffer cylinder 7. Its function is to extract air from the pressure buffer cylinder 7, creating a negative pressure environment. The vacuum pump 11 can be a rotary vane vacuum pump or a water ring vacuum pump. When the jack is impacted, the pressure inside the jack housing 3 increases, the connecting valve 9 opens, and hydraulic oil enters the pressure buffer cylinder 7 through the connecting hole, pushing the buffer piston 10 upwards, thereby dispersing the impact force.

[0035] Specifically, the oil tank 12 is used to store hydraulic oil, and its material is generally carbon steel, with a rectangular or cylindrical shape. The pump body 13 provides power to transport the hydraulic oil in the oil tank 12 to the jack housing 3. The pump body 13 can be a gear pump or a piston pump. The first connecting pipe 14, the second connecting pipe 15, and the third connecting pipe 16 are used to connect different components to realize the flow of hydraulic oil. The connecting pipes are generally metal pipes, such as copper pipes or steel pipes, to ensure their sealing and pressure resistance. A first valve 22 is installed on the first connecting pipe 14, and a second valve 23 is installed on the third connecting pipe 16. The valves can be ball valves or gate valves, used to control the flow of hydraulic oil. When the jack needs to be pressurized, the pump body 13 draws the hydraulic oil from the oil tank 12 through the second connecting pipe 15, and then delivers it to the jack housing 3 through the third connecting pipe 16. When the pressurization buffer cylinder 7 needs to be operated, the first valve 22 is opened, and the hydraulic oil enters the oil tank 12 through the first connecting pipe 14.

[0036] Specifically, base 1 is made of honeycomb rubber, which has good elasticity and cushioning properties, effectively absorbing and dispersing impact forces from the ground. Its honeycomb structure increases the rubber's deformability and improves the cushioning effect. Base 1 is generally circular or square in shape and is connected to the placement box 2 by bolts or glue.

[0037] The implementation principle of this embodiment is as follows: By setting spring buffer devices 5 and pressure buffer cylinders 7 at both ends of the mining hydraulic jack, a dual buffering function is achieved at both ends. The spring buffer device 2 absorbs the impact force from above using the elastic deformation of the spring 18, while the pressure buffer cylinder 7 disperses the impact force from the sides and below through the movement of the buffer piston 10 and the flow of hydraulic oil. The honeycomb rubber material of the base 1 also absorbs the impact force from the ground. This multi-directional buffer structure design, compared with the traditional single buffer structure, can effectively cope with impact forces of different sizes in the complex mining environment, greatly improving the service life and safety of the jack, reducing jack damage and safety accidents caused by impacts, and ensuring the normal operation of mining operations.

[0038] Example 2

[0039] The difference between this embodiment and the previous embodiment is that the number of spring buffer devices 5 is no less than four. Four or more spring buffer devices 5 can be more evenly distributed above the piston column 4, resulting in more uniform pressure on the support plate 6 and improving the buffering effect. When subjected to impact, multiple spring buffer devices 5 work simultaneously, more effectively absorbing and dispersing the impact force. For example, if there is only one spring buffer device 5, uneven force distribution may occur, leading to excessive pressure in a certain area and affecting the normal use of the jack. Multiple spring buffer devices 5 can cooperate with each other to complete the buffering task.

[0040] The implementation principle of this embodiment is as follows: increasing the number of spring buffer devices 5 can improve the uniformity and stability of the buffer, so that the jack can work more smoothly when it is impacted, further improving the service life and safety of the jack, and is especially suitable for mining operation scenarios that bear large weight and are subjected to large impact forces.

[0041] Example 3

[0042] The difference between this embodiment and the previous embodiment is that a pressure relief valve 21 is provided above the pressure buffer cylinder 7. The pressure relief valve 21 automatically opens when the pressure inside the pressure buffer cylinder 7 is too high, releasing the pressure and preventing damage to the pressure buffer cylinder 7 due to excessive pressure. The pressure relief valve 21 is generally a spring-loaded pressure relief valve; when the pressure exceeds a set value, the spring on it is compressed, the valve opens, and the pressure is released. Other types of pressure relief valves, such as pilot-operated pressure relief valves, can also be used to meet different accuracy and reliability requirements.

[0043] The implementation principle of this embodiment is as follows: setting up a pressure relief valve 21 improves the safety and reliability of the pressure buffer cylinder 7, avoids equipment damage and safety accidents caused by excessive pressure, further ensures the normal operation of the jack, and makes the jack more stable and reliable in complex mining operation environments.

[0044] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mine hydraulic jack with buffer devices at both ends, comprising a base (1), characterized in that: A placement box (2) is provided above the base (1), and a jack housing (3) is provided above the placement box (2). A piston column (4) is provided inside the jack housing (3), and several spring buffer devices (5) are provided above the piston column (4). A support plate (6) is provided above the spring buffer devices (5). A pressure buffer cylinder (7) is provided on the side surface of the jack housing (3), and a connection hole (8) is provided between the pressure buffer cylinder (7) and the jack housing (3). The connection hole (8) is provided with... A connecting valve (9) is provided. A buffer piston (10) is provided inside the pressurizing buffer cylinder (7). A vacuum pump (11) is provided above the pressurizing buffer cylinder (7). An oil tank (12) and a pump body (13) are provided inside the placement box (2). The oil tank (12) and the pressurizing buffer cylinder (7) are connected by a first connecting pipe (14). The oil tank (12) and the pump body (13) are connected by a second connecting pipe (15). The pump body (13) is connected to the jack housing (3) by a third connecting pipe (16).

2. The mine hydraulic jack with a buffer device at both ends according to claim 1, characterized in that: The number of the spring buffer devices (5) shall not be less than four.

3. The mine hydraulic jack with a buffer device at both ends according to claim 1, characterized in that: The spring buffer device (5) includes a sleeve (17) fixedly installed at the top of the piston column (4), a spring (18) fixedly installed at the bottom of the sleeve (17), a support plate (19) installed above the spring (18), a support rod (20) installed above the support plate (19), and the support rod (20) is fixedly connected to the support plate (6).

4. The mine hydraulic jack with a buffer device at both ends according to claim 1, characterized in that: A pressure relief valve (21) is provided above the pressure buffer cylinder (7).

5. The mine hydraulic jack with a buffer device at both ends according to claim 1, characterized in that: A first valve (22) is provided on the first connecting pipe (14).

6. The mine hydraulic jack with a buffer device at both ends according to claim 1, characterized in that: A second valve (23) is provided on the third connecting pipe (16).

7. The mine hydraulic jack with a buffer device at both ends according to claim 1, characterized in that: The base (1) is made of honeycomb rubber.

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