Tail beam mechanism and hydraulic support

Abstract

This invention relates to the field of coal mining equipment technology, and provides a tail beam mechanism and hydraulic support. The tail beam mechanism includes a tail beam, a slide plate, a slide plate drive cylinder, and a tail beam drive cylinder. The tail beam has an inner cavity; the slide plate drive cylinder is located within the inner cavity, with its slide plate piston rod connected to the tail beam and its slide plate cylinder body connected to the slide plate. The slide plate cylinder body moves relative to the slide plate piston rod, causing the slide plate to retract into or extend out of the inner cavity; the tail beam piston rod of the tail beam drive cylinder is rotatably connected to the shield beam, and the tail beam cylinder body is rotatably connected to the tail beam. This allows the slide plate piston rod and tail beam piston rod to be kept away from the scraper conveyor, reducing or avoiding contact between the slide plate piston rod and tail beam piston rod and the coal on the scraper conveyor, thereby reducing or eliminating malfunctions such as impact and corrosion of the slide plate piston rod and tail beam piston rod.

Description

Technical Field

[0001] This invention relates to the field of coal mining equipment technology, and in particular to a tail beam mechanism and hydraulic support. Background Technology

[0002] The top coal caving method involves setting up a mining face with a mining height of 2 to 3 meters along the bottom of the coal seam or within a certain thickness range when mining thick coal seams. The mining is carried out using fully mechanized methods. The top coal is broken into loose parts by the action of mine pressure or by loosening blasting and other methods. The loose coal is then released through the "coal release window" behind or above the support and transported out of the working face by a scraper conveyor.

[0003] Currently, top coal caving supports use plate jacks to drive the movement of the plate jacks and tail beam jacks to drive the swinging of the tail beam to achieve coal caving operations. The cylinder of the plate jack, as the fixed end, is connected to the tail beam, while the piston rod, as the moving end, is connected to the plate jack, and the movement of the plate jack is achieved through the extension and retraction of the piston rod. Similarly, the cylinder of the tail beam jack, as the fixed end, is connected to the shield beam, while the piston rod, as the moving end, is connected to the tail beam, and the swinging of the tail beam is achieved through the extension and retraction of the piston rod. This results in frequent contact between the piston rods of both the plate jacks and the tail beam jacks and the coal on the scraper conveyor, leading to frequent damage and corrosion of the piston rods, thus reducing the service life of both the plate jacks and the tail beam jacks. Summary of the Invention

[0004] This invention provides a tail beam mechanism and a hydraulic support, aiming to solve one of the technical problems existing in the prior art or related technologies.

[0005] This invention provides a tail beam mechanism, comprising:

[0006] The tail boom has an internal cavity.

[0007] power strip;

[0008] An insert plate drive cylinder is located inside the inner cavity. The insert plate piston rod of the insert plate drive cylinder is connected to the tail beam, and the insert plate cylinder body of the insert plate drive cylinder is connected to the insert plate. The insert plate cylinder body can move relative to the insert plate piston rod so that the insert plate retracts into or extends out of the inner cavity.

[0009] A tail beam drive cylinder is used to drive the tail beam to swing. The tail beam piston rod of the tail beam drive cylinder is rotatably connected to the shield beam, and the tail beam cylinder body of the tail beam drive cylinder is rotatably connected to the tail beam.

[0010] Preferably, in a tail beam mechanism provided by the present invention, the insert drive cylinder includes:

[0011] The first oil port and the second oil port are both located on the piston rod of the slide plate, and the first oil port and the second oil port are respectively used to supply oil in and out.

[0012] The first oil passage and the second oil passage are both provided on the piston rod of the insert plate. The two ends of the first oil passage are respectively connected to the first oil port and the rodless chamber of the insert plate drive cylinder; the two ends of the second oil passage are respectively connected to the second oil port and the rod chamber of the insert plate drive cylinder.

[0013] Preferably, in a tail beam mechanism provided by the present invention, the tail beam drive cylinder comprises:

[0014] The third and fourth oil ports are both located on the tail beam piston rod, and the third and fourth oil ports are used for supplying oil in and out respectively;

[0015] The third and fourth oil passages are both located on the tail beam piston rod. The two ends of the third oil passage are connected to the third oil port and the rodless chamber of the tail beam drive cylinder, respectively. The two ends of the fourth oil passage are connected to the fourth oil port and the rod chamber of the tail beam drive cylinder, respectively.

[0016] Preferably, according to a tail beam mechanism provided by the present invention, the tail beam is provided with a first through hole and a second through hole, both the first through hole and the second through hole are in communication with the inner cavity, and the first through hole is used for a first pipeline connected to the first oil port to pass through, and the second through hole is used for a second pipeline connected to the second oil port to pass through.

[0017] Preferably, in a tail beam mechanism provided by the present invention, the first through hole and the second through hole are located at the lower part or side of the tail beam.

[0018] Preferably, in a tail beam mechanism provided by the present invention, a first sealing element is provided between the wall of the first through hole and the first pipeline, and a second sealing element is provided between the wall of the second through hole and the second pipeline.

[0019] Preferably, in a tail beam mechanism provided by the present invention, the insert plate is provided with a receiving cavity, and the insert plate cylinder is located within the receiving cavity.

[0020] Preferably, in the tail beam mechanism provided by the present invention, the tail beam is a box-shaped structure.

[0021] The present invention also provides a hydraulic support, including a shield beam and a tail beam mechanism as described in any of the preceding claims.

[0022] Preferably, according to a hydraulic support provided by the present invention, at least two support members are provided on the shield beam, the support members being used to support the oil pipes connected to the third and fourth oil ports of the tail beam mechanism.

[0023] One of the above technical solutions has the following advantages and beneficial effects:

[0024] The present invention provides a tail beam mechanism and a hydraulic support. The tail beam mechanism includes a tail beam, a slide plate, a slide plate drive cylinder, and a tail beam drive cylinder. The tail beam has an inner cavity, and the slide plate drive cylinder is located within the inner cavity. The slide plate piston rod of the slide plate drive cylinder is connected to the tail beam, and the slide plate cylinder body of the slide plate drive cylinder is connected to the slide plate. The slide plate cylinder body can move relative to the slide plate piston rod, so that the slide plate can retract into or extend out of the inner cavity, thereby opening or closing the coal discharge port. The tail beam drive cylinder is used to drive the tail beam to swing for coal discharge. The tail beam piston rod of the tail beam drive cylinder is rotatably connected to the shield beam of the hydraulic support, and the tail beam cylinder body of the tail beam drive cylinder is rotatably connected to the tail beam. The tail beam cylinder body can move relative to the tail beam piston rod to realize the swing of the tail beam.

[0025] With this configuration, the slide block cylinder body of the slide block drive cylinder and the tail beam cylinder body of the tail beam drive cylinder are connected to the slide block and tail beam respectively as the moving ends. This allows the slide block piston rod and tail beam piston rod to be kept away from the scraper conveyor, which can reduce or avoid contact between the slide block piston rod and tail beam piston rod and the coal on the scraper conveyor. This can reduce or eliminate the occurrence of failures such as collisions and corrosion of the slide block piston rod and tail beam piston rod. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a top coal caving support according to an embodiment of the present invention;

[0028] Figure 2 This is a diagram showing the positional relationship between the tail beam mechanism and the scraper conveyor according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a slide-driven cylinder according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the tail beam drive cylinder according to an embodiment of the present invention.

[0031] Figure label:

[0032] 1. Base; 2. Top beam; 3. Support frame;

[0033] 4. Front beam mechanism; 5. Protective beam; 6. Tail beam;

[0034] 7. Insertion plate; 8. Insertion plate drive cylinder; 9. Tail beam drive cylinder;

[0035] 10. Rear connecting rod; 11. Scraper conveyor; 61. Inner cavity;

[0036] 81. Insertor cylinder body; 82. Insertor piston rod; 83. First connecting lug;

[0037] 84. Second connecting ear; 85. First guide belt; 86. First oil port;

[0038] 87. Second oil inlet; 88. First oil passage; 89. Second oil passage;

[0039] 91. Tail beam cylinder block; 92. Tail beam piston rod; 93. Third connecting lug;

[0040] 94. Fourth connecting ear; 95. Second guide band; 96. Third oil port;

[0041] 97. Fourth oil inlet; 98. Third oil passage; 99. Fourth oil passage. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] The following is combined with Figures 1 to 4 The tail beam mechanism and hydraulic support of some embodiments of the present invention are described.

[0044] like Figure 1 and Figure 2 As shown, the tail beam mechanism provided by the present invention may include a tail beam 6, an insert plate 7, an insert plate drive cylinder 8, and a tail beam drive cylinder 9.

[0045] The tail beam 6 is provided with an inner cavity 61, the insert plate drive cylinder 8 can be located in the inner cavity 61, and the insert plate 7 can retract into or extend out of the inner cavity 61 so that the insert plate 7 can open or close the coal discharge port to realize coal discharge and block coal blocks or gangue.

[0046] Here, the coal discharge port can be the coal discharge space between the tail beam 6 and the scraper conveyor 11.

[0047] Furthermore, the piston rod 82 of the slide plate drive cylinder 8 can be connected to the tail beam 6, and the slide plate cylinder body 81 of the slide plate drive cylinder 8 can be connected to the slide plate 7. The slide plate cylinder body 81 can move relative to the piston rod 82 of the slide plate so that the slide plate 7 can retract into the inner cavity 61 or extend out of the inner cavity 61, thereby realizing the opening or closing of the coal discharge port.

[0048] In addition, the tail beam drive cylinder 9 can be used to drive the tail beam 6 to swing, so as to facilitate coal discharge.

[0049] The tail beam piston rod 92 of the tail beam drive cylinder 9 can be rotatably connected to the shield beam 5 of the hydraulic support, and the tail beam cylinder body 91 of the tail beam drive cylinder 9 can be rotatably connected to the tail beam 6. The tail beam cylinder body 91 can move relative to the tail beam piston rod 92 to realize the swing of the tail beam 6.

[0050] Here, both the insert plate drive cylinder 8 and the tail beam drive cylinder 9 can be jacks.

[0051] With this configuration, the slide cylinder body 81 of the slide drive cylinder 8 and the tail beam cylinder body 91 of the tail beam drive cylinder 9 are connected to the slide 7 and tail beam 6 respectively as moving ends. This allows the slide piston rod 82 and the tail beam piston rod 92 to be kept away from the scraper conveyor 11, which can reduce or avoid contact between the slide piston rod 82 and the tail beam piston rod 92 and the coal on the scraper conveyor 11. This can reduce or eliminate the occurrence of collisions, corrosion and other faults of the slide piston rod 82 and the tail beam piston rod 92.

[0052] In optional embodiments of the present invention, such as Figure 3 As shown, the insert drive cylinder 8 may include a first oil port 86, a second oil port 87, a first oil passage 88, and a second oil passage 89.

[0053] The first oil port 86, the second oil port 87, the first oil passage 88, and the second oil passage 89 can all be installed on the insert piston rod 82. The first oil port 86 and the second oil port 87 can be used to supply oil in and out, respectively. The two ends of the first oil passage 88 can be connected to the first oil port 86 and the rodless chamber of the insert drive cylinder 8, respectively. The two ends of the second oil passage 89 can be connected to the second oil port 87 and the rod chamber of the insert drive cylinder 8, respectively. In this way, by opening oil ports and oil passages on the insert piston rod 82, oil can be supplied and discharged into the rodless and rod chambers of the insert drive cylinder 8, thereby realizing the movement of the insert cylinder body 81. Furthermore, by setting the oil ports and oil passages on the insert piston rod 82, the fluid supply and discharge method in the insert drive cylinder 8 can be realized, which facilitates the arrangement of oil supply and discharge pipelines and can avoid or reduce the damage to the oil supply and discharge pipelines.

[0054] In an optional embodiment, the tail beam 6 may be provided with a first through hole and a second through hole, both of which can communicate with the inner cavity 61. The first through hole can be used for a first pipeline to pass through, and the second through hole can be used for a second pipeline to pass through. The first pipeline can be a pipeline connected to the first oil port 86, and the second pipeline can be a pipeline connected to the second oil port 87. This facilitates the supply of oil to the slide plate drive cylinder 8.

[0055] In an optional embodiment, both the first through hole and the second through hole can be located at the lower part or the side of the tail beam 6. In this way, the first and second pipes can be arranged below or to the side of the tail beam 6, so that the first and second pipes are not subjected to the compression and impact of the coal body, which can avoid oil leakage and further improve the service life of the slide plate drive cylinder 8.

[0056] In an optional embodiment, a first sealing element can be provided between the wall of the first through hole and the first pipeline, and a second sealing element can be provided between the wall of the second through hole and the second pipeline. This prevents dust, slag, or water from entering the inner cavity 61 of the tail beam 6 and causing damage to the piston rod of the insert drive cylinder 8.

[0057] In optional embodiments of the present invention, such as Figure 4 As shown, the tail beam drive cylinder 9 may include a third oil port 96, a fourth oil port 97, a third oil passage 98, and a fourth oil passage 99.

[0058] The third oil port 96, the fourth oil port 97, the third oil passage 98, and the fourth oil passage 99 can all be installed on the tail beam piston rod 92. The two ends of the third oil passage 98 can be connected to the third oil port 96 and the rodless chamber of the tail beam drive cylinder 9, respectively. The two ends of the fourth oil passage 99 can be connected to the fourth oil port 97 and the rod chamber of the tail beam drive cylinder 9, respectively. In this way, by opening oil ports and oil passages on the tail beam piston rod 92, oil can be introduced and discharged into the rodless and rod chambers of the tail beam drive cylinder 9, thereby enabling the movement of the tail beam cylinder 91. Furthermore, by installing the oil ports and oil passages on the tail beam piston rod 92, contact between the oil inlet / outlet pipes and the coal on the scraper conveyor 11 can be avoided.

[0059] In an optional embodiment, a first guide belt 85 may be provided between the insert cylinder body 81 and the insert piston rod 82 of the insert drive cylinder 8. The first guide belt 85 can play a guiding role and prevent wear on the insert cylinder body 81 and the insert piston rod 82.

[0060] A second guide belt 95 can be provided between the tail beam cylinder body 91 and the tail beam piston rod 92 of the tail beam drive cylinder 9. The second guide belt 95 can play a guiding role and prevent wear on the tail beam cylinder body 91 and the tail beam piston rod 92.

[0061] In an optional embodiment, the end of the insert piston rod 82 away from the insert cylinder body 81 may be provided with a first connecting lug 83, which can be fixedly connected to the tail beam 6; the end of the insert cylinder body 81 away from the insert piston rod 82 may be provided with a second connecting lug 84, which can be fixedly connected to the insert plate 7. In this way, the connection between the insert plate 7 and the insert drive cylinder 8 can be realized.

[0062] A third connecting lug 93 can be provided at the end of the tail beam piston rod 92 away from the tail beam cylinder 91. The third connecting lug 93 can be hinged to the shield beam 5. A fourth connecting lug 94 can be provided at the end of the tail beam cylinder 91 away from the tail beam piston rod 92. The fourth connecting lug 94 can be hinged to the tail beam 6. In this way, the tail beam 6 can be connected to the tail beam drive cylinder 9.

[0063] In an optional embodiment of the present invention, at least two opposing sliding grooves may be provided on the cavity wall of the inner cavity 61 of the tail beam 6. Each sliding groove may be provided with a roller, which can contact the outer wall of the insert plate 7 and slide within the groove. This facilitates the movement of the insert plate 7 from the inner cavity 61 and also provides support and limitation for the insert plate 7, preventing excessive force on the insert plate 7 and thus avoiding displacement and excessive force on the insert plate cylinder 81.

[0064] In an optional embodiment, the end of the insert plate 7 located within the inner cavity 61 may be provided with at least two baffles, which can be used to prevent the roller from separating from the insert plate 7. In this way, it can be ensured that the roller is always in contact with the insert plate 7.

[0065] Furthermore, to prevent the roller from sliding out of the outlet of the inner cavity 61, a sealing baffle can be provided at the outlet of the inner cavity 61 to block the roller.

[0066] In an optional embodiment, the insert plate 7 and the sealing stop can slide to form a seal. This prevents external slag or dust from entering the inner cavity 61 and affecting the rolling effect of the roller and the service life of the piston rod.

[0067] Here, the sealing element can be a sealing ring.

[0068] In a first optional embodiment of the present invention, the tail beam mechanism may further include a first detection element, which is used to detect the force on the insert plate drive cylinder 8. The first detection element can be used to communicate with the control system of the hydraulic support so as to transmit the force on the insert plate drive cylinder 8 to the control system of the hydraulic support so as to monitor the force on the insert plate drive cylinder 8.

[0069] In an optional embodiment, the control system of the hydraulic support can control the insert drive cylinder 8 according to the detection signal of the first detection element to avoid the insert drive cylinder 8 being damaged due to excessive force.

[0070] Specifically, when the first detection element detects that the force on the insert plate drive cylinder 8 is greater than a preset value, the hydraulic support control system can control the cylinder body of the insert plate drive cylinder 8 to retract into the inner cavity 61 of the tail beam 6. In this way, the cylinder body of the insert plate drive cylinder 8 is no longer subjected to collisions with the coal body, thus preventing the insert plate drive cylinder 8 from being damaged due to excessive force.

[0071] In an optional embodiment, the first detection element may include a first pressure detection element and a second pressure detection element. The first pressure detection element can be used to detect the pressure in the rodless chamber of the insert drive cylinder 8, and the second pressure detection element can be used to detect the pressure in the rod chamber of the insert drive cylinder 8. When the pressure value detected by the first pressure detection element or the second pressure detection element increases or decreases rapidly, it indicates that the insert drive cylinder 8 has malfunctioned.

[0072] Here, both the first pressure sensing element and the second pressure sensing element can be pressure sensors.

[0073] In a second optional embodiment of the present invention, the tail beam mechanism may further include a vibration detection element, which can be used to detect the vibration of the insert plate drive cylinder 8 in order to determine whether the insert plate drive cylinder 8 has malfunctioned.

[0074] In an optional embodiment, the vibration detection element can be communicatively connected to the control system of the hydraulic support to transmit detection signals to the control system for monitoring the status of the insert drive cylinder 8.

[0075] In an optional embodiment, the hydraulic support may include an alarm that can communicate with the control system of the hydraulic support. When the vibration detection element detects that the vibration of the insert drive cylinder 8 is greater than a preset vibration frequency, the control system controls the alarm to sound, so that the staff can be informed in time that the insert drive cylinder 8 has malfunctioned.

[0076] In an optional embodiment, the tail beam 6 can be a box-shaped structure to give the tail beam 6 sufficient rigidity and strength.

[0077] The hydraulic support provided by the present invention is described below. The hydraulic support described below can be referred to in correspondence with the tail beam mechanism described above.

[0078] The present invention provides a hydraulic support that may include a shield beam 5 and a tail beam mechanism as described in any of the above embodiments.

[0079] The beneficial effects achieved by the hydraulic support provided by this invention are consistent with the beneficial effects achieved by the tail beam mechanism provided by this invention, so they will not be repeated here.

[0080] It should be noted that the aforementioned hydraulic support can be a top coal caving support.

[0081] Here, the upper end of the tail beam 6 of the tail beam mechanism can be hinged to the shield beam 5. The tail beam 6 can support the loose top coal and roof rock, maintain a good working space, and the up and down swing of the tail beam 6 can control the rear coal release, creating conditions for the release of top coal.

[0082] Since the tail beam 6 needs to withstand the impact of the top coal and the roof rock, it is required to have sufficient rigidity and strength. Therefore, the tail beam 6 can adopt an integral box structure.

[0083] In an optional embodiment of the present invention, at least two support members may be provided on the shield beam 5. The support members may be used to support the oil pipes connected to the third oil port 96 and the fourth oil port 97 of the tail beam mechanism, so as to support and limit the oil pipes, avoid the oil pipes from restricting other structures during the operation of the top coal caving support, and prevent other structures from squeezing or abrading the oil pipes.

[0084] Here, the support can be located below the shield beam 5 to further prevent the oil pipe from being worn or squeezed.

[0085] In optional embodiments of the present invention, such as Figure 1 As shown, the top coal caving support also includes a base 1, which is a component that transmits the roof pressure to the base plate and stabilizes the support 3. The functions of the base 1 include: creating an installation space for the columns, hydraulic control devices, pushing devices and other auxiliary devices; creating a good working environment for the workers; having a certain function of removing and blocking rock; and ensuring the stability of the support 3.

[0086] The top coal caving support also includes a side protection device, which consists of a side protection plate, a side protection jack, short rods, and long rods forming a small four-bar linkage mechanism. The function of the side protection device includes: using the small four-bar linkage mechanism to lift and level the side protection plate, so that it has the dual functions of lifting the roof, timely roof protection, and side protection.

[0087] The top coal caving support may also include a top beam 2, which is in direct contact with the roof and supports the roof. Its functions include: bearing the load of the roof rock and coal; repeatedly supporting the top coal, which can break up relatively hard top coal; and providing sufficient safety space for the longwall face.

[0088] The top coal caving support may also include a front beam mechanism 4, which consists of a front beam and a front beam jack. The functions of the front beam mechanism 4 include: making the four columns of the top coal caving support more evenly loaded, so as to improve the roof connection performance of the top beam 2, adjusting the position of the resultant force application point of the top beam 2, so that the front beam can adapt to the floating changes of the roof, and can also hoist coal mining equipment when necessary.

[0089] In an optional embodiment of the present invention, the upper part of the shield beam 5 is hinged to the top beam 2, and the lower part is connected to the front connecting rod and the rear connecting rod 10. It is connected to the base 1 of the top coal caving support as a whole through the front connecting rod and the rear connecting rod 10. The functions of the shield beam 5 include: bearing the horizontal component force and lateral force given by the roof plate, increasing the torsional resistance of the support 3; the shield beam 5, the front and rear connecting rods 10, and the base 1 form a four-bar linkage mechanism, which can ensure that the beam end distance does not change much; and it can prevent the rear top coal and gangue from moving forward, thus maintaining the working space.

[0090] The top coal caving support also includes a front connecting rod and a rear connecting rod 10. The front connecting rod and the rear connecting rod 10 are hinged to the shield beam 5 and the base 1 respectively, and together with the shield beam 5 and the base 1, they form a four-bar linkage mechanism. The functions of the front connecting rod and the rear connecting rod 10 include: minimizing the change in the distance between the front end of the top beam 2 and the coal wall (i.e., the beam end distance) within the height adjustment range of the support 3, so as to better support the roof; and bearing the horizontal component force and lateral force of the roof, so that the column is not subject to lateral force.

[0091] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. 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 network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tail beam mechanism, characterized in that, include: The tail boom has an internal cavity. power strip; An insert plate drive cylinder is located inside the inner cavity. The insert plate piston rod of the insert plate drive cylinder is connected to the tail beam, and the insert plate cylinder body of the insert plate drive cylinder is connected to the insert plate. The insert plate cylinder body can move relative to the insert plate piston rod so that the insert plate retracts into or extends out of the inner cavity. A tail beam drive cylinder is used to drive the tail beam to swing. The tail beam piston rod of the tail beam drive cylinder is rotatably connected to the shield beam, and the tail beam cylinder body of the tail beam drive cylinder is rotatably connected to the tail beam. The slide plate drive cylinder includes a first oil port and a second oil port; the first oil port and the second oil port are both disposed on the slide plate piston rod and are used for supplying oil in and out respectively. The tail beam is provided with a first through hole and a second through hole. Both the first through hole and the second through hole are connected to the inner cavity. The first through hole is used for a first pipeline connected to the first oil port to pass through, and the second through hole is used for a second pipeline connected to the second oil port to pass through. The first through hole and the second through hole are located at the lower part or side of the tail beam. A first sealing element is provided between the hole wall of the first through hole and the first pipeline, and a second sealing element is provided between the hole wall of the second through hole and the second pipeline.

2. The tail beam mechanism according to claim 1, characterized in that, The insert drive cylinder also includes: The first oil passage and the second oil passage are both provided on the piston rod of the insert plate. The two ends of the first oil passage are respectively connected to the first oil port and the rodless chamber of the insert plate drive cylinder; the two ends of the second oil passage are respectively connected to the second oil port and the rod chamber of the insert plate drive cylinder.

3. The tail beam mechanism according to claim 1, characterized in that, The tail beam drive cylinder includes: The third and fourth oil ports are both located on the tail beam piston rod, and the third and fourth oil ports are used for supplying oil in and out respectively; The third and fourth oil passages are both located on the tail beam piston rod. The two ends of the third oil passage are connected to the third oil port and the rodless chamber of the tail beam drive cylinder, respectively. The two ends of the fourth oil passage are connected to the fourth oil port and the rod chamber of the tail beam drive cylinder, respectively.

4. The tail beam mechanism according to claim 1, characterized in that, The insert plate is provided with a receiving cavity, and the insert plate cylinder is located inside the receiving cavity.

5. The tail beam mechanism according to claim 1, characterized in that, The tail beam has a box-shaped structure.

6. A hydraulic support, characterized in that, It includes a protective beam and a tail beam mechanism as described in any one of claims 1-5.

7. The hydraulic support according to claim 6, characterized in that, The shield beam is provided with at least two support members, which are used to support the oil pipes connected to the third and fourth oil ports of the tail beam mechanism.

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