Hydraulic support guide type pushing mechanism

Abstract

The utility model discloses a hydraulic support guide formula push -and -go mechanism relates to hydraulic support technical field, including the lifting of bottom jack of installing on the base of hydraulic support, the middle grade department of base is equipped with push rod, and the push rod is installed with push -and -go jack between the base, and the top surface of push rod is fixed with two opposite setting guide plate, and the equal interval guide groove along the length direction of push rod is formed between two guide plates, and the free end of push -and -go jack is fixed with the push -and -go guide portion in the equal interval guide groove. The utility model improves push -and -go directionality, reduces push -and -go deflection, and it is favorable to keep the working face coal mining operation.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support technology, and in particular to a hydraulic support guide-type pushing mechanism. Background Technology

[0002] Hydraulic supports are one of the three main components of a fully mechanized mining face. Their core purpose is to support the roof of the face and enclose the coal mining space. A pushing mechanism is installed on the base of the hydraulic support for pushing the conveyor and pulling the support. This mechanism mainly includes a pushing jack and a push rod. The front end of the push rod is connected to a section of the conveyor at the corresponding position on the scraper conveyor. The specific pushing process is as follows: After the coal mining machine cuts the coal, the hydraulic support maintains its support of the roof. The pushing jack in the pushing mechanism pushes the push rod (generally, the pushing jack retracts), using the fixing force generated by the supporting force of the hydraulic support to ensure that the hydraulic support remains stationary. Figure 8 and Figure 9 As shown, the corresponding chute is pushed a specified distance; this process is called the chute pushing process. Then, the hydraulic support is lowered to release its supporting function. The lifting jacks on the hydraulic support are used to lift the front end of the hydraulic support base, reducing the contact area between the hydraulic support and the ground and reducing the moving resistance. Given that the overall weight of the scraper conveyor is greater than that of a single hydraulic support, the hydraulic support is moved forward by pulling with the pushing jacks (usually by extending the pushing jacks). This process is called the support pulling process. After moving forward the same distance, the lifting jacks are retracted, the base of the hydraulic support is grounded again, and the hydraulic support supports the roof again, continuing the support for the next round of coal cutting by the mining machine.

[0003] During the aforementioned work process, factors such as uneven coal cutting or the inclination of the coal seam floor may affect the process. Figure 9 As shown, during the push-pull process, the push rod may become misaligned, meaning that after the push-pull is completed, the push rod has a deflection angle relative to the corresponding base. This causes the hydraulic support to also become misaligned during the pull-up process. Currently, the pull-up process uses side plates on the top beam and shield beam to push the hydraulic support laterally, but the effect is minimal. Over time, the hydraulic supports throughout the working face become misaligned, making it impossible to perform coal mining operations according to the original design. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a hydraulic support guide-type pushing mechanism that improves pushing guidance, reduces pushing deviation, and facilitates coal mining operations at the working face.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a hydraulic support guide-type pushing mechanism, including a lifting jack installed on the base of the hydraulic support, a push rod provided at the middle of the base, a pushing jack installed between the push rod and the base, two oppositely arranged guide plates fixed on the top surface of the push rod, an equally spaced guide groove formed between the two guide plates along the length direction of the push rod, and a pushing guide part located in the equally spaced guide groove fixed on the free end of the pushing jack.

[0006] As a preferred technical solution, the free end of the pushing jack is fixedly provided with a bottom lifting support portion located above the top surface of the two guide plates respectively.

[0007] As a preferred technical solution, the base is provided with lifting guide grooves on both sides of the lifting jack, and the free end of the lifting jack is fixed with lifting guide parts located in the lifting guide grooves.

[0008] As a preferred technical solution, the bottom-lifting guide part also serves as the bottom-lifting support part.

[0009] As a preferred technical solution, two centering cylinders are respectively installed at the two sides of the base. The driving end of the centering cylinder is used to abut against the side of the push rod, and the centering cylinders at the two sides of the base correspond one-to-one.

[0010] Due to the adoption of the above technical solution, the hydraulic support guiding and pushing mechanism includes a lifting jack installed on the base of the hydraulic support. A push rod is provided at the middle of the base, and a pushing jack is installed between the push rod and the base. Two opposing guide plates are fixedly provided on the top surface of the push rod, and an equally spaced guide groove is formed between the two guide plates along the length direction of the push rod. A pushing guide part located in the equally spaced guide groove is fixedly provided on the free end of the pushing jack. This utility model utilizes the cooperation between the pushing guide part provided on the lifting jack and the equally spaced guide groove on the push rod to achieve the purpose of adding a guide point in the middle of the push rod. The guiding effect of this point can effectively suppress excessive deflection of the push rod during the pushing process. Correspondingly, during the pulling process, it can promote the hydraulic support to move forward along the length direction of the basically aligned push rod, thereby improving the overall pushing guidance and facilitating the coal mining operation at the working face. In addition, the lifting jack can still lift the base during the pulling process without affecting the pulling operation. Attached Figure Description

[0011] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0012] Figure 1This is a three-dimensional structural schematic diagram of Embodiment 1 of this utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure from another perspective;

[0014] Figure 3 This is a cross-sectional structural diagram of the lifting jack in Embodiment 1 of this utility model;

[0015] Figure 4 This is a top view of the structural principle of the first embodiment of this utility model during the pushing process;

[0016] Figure 5 This is a schematic diagram of the structural principle of the first embodiment of this utility model when the bottom is lifted after being pushed and slid.

[0017] Figure 6 This is a top view of the structure of Embodiment 2 of this utility model;

[0018] Figure 7 This is a frontal sectional view of Embodiment 2 of the present invention;

[0019] Figure 8 This is a structural diagram of the existing pushing mechanism and its matching with the scraper conveyor;

[0020] Figure 9 yes Figure 8 A diagram showing the state during the push-pull process.

[0021] In the diagram: 1-base; 11-main rib; 12-intermediate section; 2-bottom lifting jack; 21-bottom lifting guide groove; 22-bottom lifting guide part; 23-bottom lifting support part; 24-pushing guide part; 3-push rod; 31-guide plate; 32-equally spaced guide groove; 33-guide block; 34-rod bottom plate; 35-rod top plate; 36-rod side plate; 4-pushing jack; 5-centering cylinder; 9-scraper conveyor; 91-chute. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0023] Example 1: As Figures 1 to 5As shown, the hydraulic support guide-type pushing mechanism includes a lifting jack 2 mounted on a base 1 of the hydraulic support. A push rod 3 is provided at the middle section 12 of the base 1, and a pushing jack 4 is installed between the push rod 3 and the base 1. Conventionally, the base 1 includes four main ribs 11. The space between two inner main ribs is the middle section space, and the space between the inner and outer main ribs on each side is the side section space. The push rod 3 is located at the middle section 12. The lifting jack 2 is used to lift the front end of the base 1 when pulling the support to improve the smoothness of pulling the support. Based on the use of the lifting jack 2, the pushing jack 4 is preferably an inverted jack, that is, when it retracts, it drives the push rod 3 to push forward, and when it extends, it drives the hydraulic support to move forward.

[0024] The base 1 is provided with lifting guide grooves 21 on both sides of the lifting jack 2. The free end of the lifting jack 2 is fixed with lifting guide parts 22 located in the lifting guide grooves 21 to guide the lifting action when the lifting jack 2 is extended, so as to ensure smooth lifting.

[0025] The above are the known existing technologies, and the specific structural details and principles will not be elaborated here.

[0026] In this embodiment, two opposing guide plates 31 are fixedly provided on the top surface of the push rod 3, and equally spaced guide grooves 32 are formed between the two guide plates 31 along the length direction of the push rod 3. A push guide part 24 located in the equally spaced guide grooves 32 is fixedly provided on the free end of the push jack 4. The lifting guide part 22 provided at the driving end of the bottom lifting jack 2, that is, its free end, has almost no gap with the bottom of the two side lifting guide grooves 21, so the free end of the bottom lifting jack 2 is restricted in the left and right direction. In this embodiment, by utilizing the cooperation between the push guide part 24 provided on the bottom lifting jack 2 and the equally spaced guide grooves 32 on the push rod 3, the purpose of adding a guide point in the middle of the push rod 3 can be achieved. Furthermore, the push rod 3 is designed with guide blocks 33 at its rear end that fit with the structural clearance of the bases 1 on both sides. This increased guidance helps to effectively suppress excessive deflection of the push rod 3 during the pushing process. Correspondingly, during the pulling process, the hydraulic support can move forward along the length of the basically aligned push rod 3, thus improving the overall guiding performance and facilitating coal mining operations at the working face. In addition, during the pulling process, the bottom-lifting jack 2 can still lift the base 1 without affecting the pulling operation.

[0027] The push rod 3 has a box-shaped structure and mainly includes a bottom plate 34, a top plate 35, and two side plates 36 between the bottom plate 34 and the top plate 35. In this embodiment, the guide plate 31 can be integrally machined with the side plates of the push rod 3. That is, the guide plate 31 and the corresponding side plate 36 can be CNC cut as a whole. This integrity can improve the connection strength of the guide plate 31 on the push rod 3, which is beneficial to ensuring the guiding function and the subsequent lifting support function. The pushing guide part 24 is preferably a column structure, so as to reduce the frictional resistance between it and the guide plate 31 while playing a guiding role, which is beneficial to improving the smoothness of pushing.

[0028] Preferably, the free end of the pushing jack 4 is fixedly provided with lifting support parts 23 located above the top surfaces of the two guide plates 31. Based on this, when lifting the bottom, the lifting jack 2 does not need to abut against the top surface of the push rod 3, but instead abuts against the top surfaces of the two guide plates 31 through the lifting support parts 23, thus avoiding the obstruction of the lifting guide parts 22 by the guide plates 31 when the lifting jack 2 extends excessively. Furthermore, based on the setting of the lifting guide parts 22 on the lifting jack 2, in this embodiment, the lifting guide parts 22 also serve as the lifting support parts 23, thereby simplifying the structure.

[0029] Example 2: Figure 6 and Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that two centering cylinders 5 are respectively installed at the two sides of the base 1. The driving end of the centering cylinder 5 is used to abut against the side of the push rod 3, and the centering cylinders 5 at the two sides of the base 1 correspond one-to-one. Therefore, before each push, the four centering cylinders 5 are extended, and the four centering cylinders 5 can form a centering effect on the two points of the push rod 3, achieving the purpose of pre-adjusting the push rod 3, which helps to further improve the guiding performance of the push. After adjustment, the centering cylinders 5 are retracted, and the pushing and pulling operations can be performed.

[0030] Preferably, stroke sensors are installed in the centering cylinders 5 on both sides to precisely control the extension stroke, thereby ensuring the pre-adjustment effect of the push rod 3.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic support guide type pushing mechanism, comprising a lifting jack installed on a base of a hydraulic support, a push rod is arranged at a middle section of the base, and a pushing jack is installed between the push rod and the base, characterized in that: Two opposing guide plates are fixedly provided on the top surface of the push rod, and an equally spaced guide groove is formed between the two guide plates along the length direction of the push rod. A push guide part located in the equally spaced guide groove is fixedly provided on the free end of the push jack.

2. The hydraulic support guide-type pusher mechanism according to claim 1, characterized in that: The free end of the pushing jack is fixedly provided with a lifting support part located above the top surface of the two guide plates respectively.

3. The hydraulic support guide-type pusher mechanism according to claim 2, characterized in that: The base is provided with lifting guide grooves on both sides of the lifting jack, and the free end of the lifting jack is fixed with lifting guide parts located in the lifting guide grooves.

4. The hydraulic support guide-type pushing mechanism as described in claim 3, characterized in that: The bottom-lifting guide part also serves as the bottom-lifting support part.

5. The hydraulic shielded pusher mechanism of claim 1, wherein: Two centering cylinders are installed at each of the two sides of the base. The driving end of the centering cylinder is used to abut against the side of the push rod, and the centering cylinders at the two sides of the base correspond one-to-one.

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