Adjustable shield receiving portal sealing device

Abstract

The present application relates to shield receiving portal sealing technical field, concretely is a kind of adjustable shield receiving portal sealing device, including mobile support assembly, the end surface of mobile support assembly is provided with adjustable sealing assembly, the mobile support assembly includes scissor lift, and the bottom four corners of scissor lift are provided with universal wheel;The adjustable sealing assembly includes the loading rack installed on the end surface of scissor lift, the upper side and the lower side of loading rack are provided with fine adjustment push mechanism, the front side of loading seat is equipped with sealing fit control mechanism, and the front side of receiving plate is provided with sealing piece installation clamping assembly;Through fine adjustment push mechanism, sealing fit control mechanism, sealing piece installation clamping assembly can realize the position control of sealing piece, make the fit positioning effect between sealing piece and shield receiving portal good, so that sealing piece is good to the sealing effect of shield receiving portal.

Description

Technical Field

[0001] This invention relates to the field of shield tunnel receiving portal sealing technology, specifically an adjustable shield tunnel receiving portal sealing device. Background Technology

[0002] In the increasingly competitive domestic subway market, construction companies face significant risks during the shield tunneling machine receiving process. These risks are influenced by factors such as engineering geological conditions, hydrological conditions, the effectiveness of reinforcement zones, and the condition of ground structures and pipelines. The tunnel portal may experience soil collapse, leakage, or subsidence. The shield receiving process is particularly challenging in water-rich soft soil conditions, where ground subsidence and collapse caused by water and sand inrush can lead to major accidents such as burying the shield. Therefore, in addition to end reinforcement, portal sealing is crucial for safe shield receiving. Careful consideration must be given to the construction quality of the portal sealing device to ensure the safe and smooth reception of the shield.

[0003] Currently, the commonly used sealing device involves first reinforcing the area around the tunnel entrance, and then installing a steel ring at the entrance. Existing tunnel entrance sealing methods use rubber curtains in conjunction with pressure plates to achieve the sealing purpose. When the tunnel boring machine (TBM) is received, the tunnel entrance must be completely removed. After the TBM passes the approach bridge onto the receiving frame, the tunnel entrance is then sealed. During the sealing process, due to limitations in the number of workers, welding time, working space, and working environment, the gaps at the tunnel entrance are exposed for too long, resulting in untimely sealing. When water leakage occurs, welding operations are severely affected, which can easily lead to collapse and leakage. Therefore, an adjustable TBM receiving tunnel entrance sealing device is needed to improve the above problems. Summary of the Invention

[0004] To address the issue of delayed sealing of tunnel portals due to prolonged exposure of gaps during sealing operations, this invention provides an adjustable shield tunnel receiving portal sealing device to solve the aforementioned problem.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An adjustable shield tunnel receiving portal sealing device includes a movable support assembly, the end face of which is provided with an adjustable sealing assembly, the movable support assembly including a scissor lift frame, and universal wheels provided at the four bottom corners of the scissor lift frame.

[0007] The adjustable sealing assembly includes a mounting frame installed on the end face of the scissor lift frame. A fine-tuning pushing mechanism is provided on both the upper and lower sides of the mounting frame. The fine-tuning pushing mechanism includes mounting square tubes installed on the left and right sides of the mounting frame. A first mounting slide rail is installed on the inner wall of each mounting square tube. A matching first receiving slider is slidably mounted on the first mounting slide rail. A receiving cross plate is provided between the two mounting square tubes. A fine-tuning pushing cylinder is installed at the middle of the front side of the receiving cross plate. A mounting seat is installed on the first mounting slide rail via the first receiving slider. A sealing and fitting adjustment mechanism is installed on the front side of the mounting seat.

[0008] The sealing and fitting adjustment mechanism includes a mounting plate installed on the front side of the mounting base. Second receiving sliders are correspondingly arranged on the lower left and right sides of the front of the mounting plate. A matching second mounting slide rail is slidably mounted on the second receiving slider. A supporting square tube is provided at the lower end of the second mounting slide rail. A positioning support plate is provided at the middle of the upper front of the mounting plate. An adjusting screw is rotatably mounted at the middle of the positioning support plate. Guide rods are symmetrically arranged on the positioning support plate based on the adjusting screw as the center line. A transmission track wheel is provided on the upper side of the adjusting screw. A drive motor is provided on the upper right side of the front of the mounting plate. A drive track wheel is provided at the drive end of the drive motor. Receiving plates are provided at both ends of the supporting square tube. A sealing element mounting clamping assembly is provided on the front side of the receiving plate.

[0009] The sealing component installation clamping assembly includes a loading square tube installed on the front side of the receiving plate. A connecting plate is positioned on the left and right sides of the front side of the loading square tube. A transmission wheel is installed at the bottom of the connecting plate, and the two sets of transmission wheels are connected by a transmission belt. An installation plate is installed on the upper side of the loading square tube, and an electric push rod is installed on the installation plate. Third receiving slide rails are positioned on the lower sides of both ends of the loading square tube, and a matching third receiving slider is slidably installed on the third receiving slide rail. A positioning clamp is installed on the third receiving slider, and a connecting plate is installed on both sets of positioning clamps. A positioning plate is installed on the lower inner wall of the positioning clamp, and a clamping plate is installed on the positioning plate. A sealing component is installed on the clamping plate, and grouting pipes are positioned on the left and right sides of the front side of the sealing component.

[0010] As a preferred embodiment of the present invention, the scissor lift frame is provided with corresponding adapter seats on the left and right sides, and a support arm is rotatably mounted on the adapter seat. The other end of the support arm is provided with an adjustable support foot.

[0011] As a preferred embodiment of the present invention, the two ends of the mounting square tube are fixedly connected to the mounting frame by reinforcing angle plates.

[0012] As a preferred embodiment of the present invention, the driving end of the fine-tuning cylinder is fixedly connected to the back of the mounting base, and the mounting base has a concave cross-section when viewed from above.

[0013] As a preferred embodiment of the present invention, the drive track wheel and the transmission track wheel are connected by a matching connecting track, the lower end of the adjusting screw is threadedly connected to the supporting square tube, and the guide rod is slidably connected to the supporting square tube.

[0014] As a preferred embodiment of the present invention, the drive end of the electric push rod is fixedly connected to one of the connecting plates.

[0015] As a preferred embodiment of the present invention, the connecting plate on one side is connected to the rear side of one end of the transmission belt, and the connecting plate on the other side is connected to the front side of one end of the transmission belt. The connecting plate is connected to the transmission belt by fixing screws.

[0016] As a preferred embodiment of the present invention, the positioning clamp is arranged in an "L" shape.

[0017] As a preferred embodiment of the present invention, positioning studs are provided on the front and rear sides of the sealing member, and the clamping plate is connected to the positioning studs by a fixing nut.

[0018] As a preferred embodiment of the present invention, the inner wall of the sealing member is hollow, and a sealing gasket is provided on the inner ring wall of the sealing member.

[0019] 1. Compared with the prior art, the present invention sets a movable support component in the adjustable shield receiving tunnel door sealing device. The movable support component makes the positioning and movement adjustment of the adjustable sealing component convenient. Under the action of the scissor lift, the height adjustment of the adjustable sealing component is simple and convenient, thus making the docking effect between the adjustable sealing component and the shield receiving tunnel door good. The support arm makes the unfolding or folding of the adjustable support feet simple and convenient. The adjustable support feet make the positioning support stability of the scissor lift high, thus making the positioning and use effect of the adjustable sealing component 2 good.

[0020] 2. Compared with the prior art, the present invention, by setting a fine-tuning pushing mechanism in the adjustable shield receiving tunnel portal sealing device, can adjust and push the horizontal position of the sealing fit control mechanism and the sealing component installation clamping assembly, thereby improving the sealing effect of the sealing fit control mechanism and the sealing component installation clamping assembly when sealing the shield receiving tunnel portal, and improving the sealing effect of the shield receiving tunnel portal. The reinforcing angle plate can improve the stability of the transition positioning between the mounting square tube and the mounting frame. The structural design of the mounting seat can make the mounting seat have good stability during adjustment, and at the same time have a better mounting and transition effect on the mounting plate.

[0021] 3. Compared with the prior art, the present invention sets a sealing and fitting adjustment mechanism in the adjustable shield receiving tunnel door sealing device. The sealing and fitting adjustment mechanism can realize the up and down movement adjustment of the sealing component installation clamping assembly, so that the sealing component installation clamping assembly can better fit and position with the shield receiving tunnel door, thus achieving a better sealing effect of the shield receiving tunnel door.

[0022] 4. Compared with the prior art, the present invention enables position control of the sealing component through a fine-tuning pushing mechanism, a sealing and fitting adjustment mechanism, and a sealing component installation and clamping assembly. This results in a better fitting and positioning effect between the sealing component and the shield receiving tunnel entrance, thus ensuring a better sealing effect of the sealing component on the shield receiving tunnel entrance. By positioning the connecting plates at both ends of the transmission belt and setting them one in front of the other, the connecting plates can achieve a good centering effect under the action of the transmission belt, making the installation and positioning of the sealing component simple and convenient. The sealing gasket set on the inner ring wall of the sealing component ensures a good sealing effect between the sealing component and the shield receiving tunnel entrance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the movable support component structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the adjustable sealing assembly structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the fine-tuning push mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the sealing fit adjustment mechanism and sealing component mounting and clamping assembly of the present invention;

[0028] Figure 6 This is a schematic diagram of the sealing element mounting and clamping assembly structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the sealing component structure of the present invention;

[0030] Figure 8 This is an enlarged structural diagram of part A of the present invention.

[0031] In the diagram: 1. Movable support assembly; 101. Scissor lift frame; 102. Casters; 103. Adapter seat; 104. Support arm; 105. Adjustable support feet; 2. Adjustable sealing assembly; 201. Mounting frame; 3. Fine-tuning push mechanism; 301. Mounting square tube; 302. First mounting slide rail; 303. First receiving slider; 304. Receiving cross plate; 305. Fine-tuning push cylinder; 306. Mounting seat; 307. Reinforcing angle plate; 4. Sealing and fitting adjustment mechanism; 401. Mounting plate; 402. Second receiving slider; 403. Second mounting slide rail; 404. Mounting square tube; 40 5. Positioning support plate; 406. Adjusting screw; 407. Guide rod; 408. Transmission track wheel; 409. Drive motor; 410. Drive track wheel; 411. Receiving plate; 5. Seal installation clamping assembly; 501. Loading square tube; 502. Rotary connecting plate; 503. Transmission wheel; 504. Transmission belt; 505. Mounting plate; 506. Electric push rod; 507. Third bearing slide rail; 508. Third receiving slider; 509. Positioning clamping plate; 510. Connecting plate; 511. Positioning plate; 512. Clamping plate; 513. Sealing component; 514. Grouting pipe; 515. Positioning stud. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Example: Please refer to Figure 1-8 An adjustable shield tunnel receiving portal sealing device is shown, comprising a movable support assembly 1, an adjustable sealing assembly 2 provided on the end face of the movable support assembly 1, the movable support assembly 1 including a scissor lift frame 101, and casters 102 provided at the four corners of the bottom of the scissor lift frame 101; the movable support assembly 1 enables convenient positioning and movement adjustment of the adjustable sealing assembly 2, and under the action of the scissor lift frame 101, the height adjustment of the adjustable sealing assembly 2 is simple and convenient, thereby achieving a good docking effect between the adjustable sealing assembly 2 and the shield tunnel receiving portal.

[0034] The scissor lift frame 101 has corresponding adapter seats 103 on its left and right sides, and a support arm 104 is rotatably mounted on the adapter seat 103. The other end of the support arm 104 is provided with an adjustable support foot 105. The support arm 104 makes it easy and convenient to unfold or store the adjustable support foot 105. The adjustable support foot 105 ensures high positioning stability of the scissor lift frame 101, thereby improving the positioning and performance of the adjustable sealing assembly 2.

[0035] In this embodiment, specific references are made. Figure 1 , 3 As shown in Figure 4, the adjustable sealing assembly 2 includes a mounting frame 201 installed on the end face of the scissor lift frame 101. Fine-tuning pushing mechanisms 3 are provided on both the upper and lower sides of the mounting frame 201. Each fine-tuning pushing mechanism 3 includes mounting square tubes 301 installed on the mounting frame 201, corresponding to each other on the left and right sides. A first mounting slide rail 302 is installed on the inner wall of the mounting square tubes 301. A matching first receiving slider 303 is slidably installed on the first mounting slide rail 302. A receiving cross plate 304 is provided between the two mounting square tubes 301. A fine-tuning push cylinder 305 is installed at the middle of the front side of 04. The first mounting slide rail 302 is mounted with a mounting seat 306 through the first mounting slider 303. A sealing and fitting control mechanism 4 is installed on the front side of the mounting seat 306. The fine-tuning push mechanism 3 can adjust and push the horizontal position of the sealing and fitting control mechanism 4 and the sealing component installation clamping assembly 5, so that the sealing and fitting control mechanism 4 and the sealing component installation clamping assembly 5 can perform better when sealing the shield receiving tunnel door, and the sealing effect of the shield receiving tunnel door can be better.

[0036] The two ends of the mounting square tube 301 are fixedly connected to the mounting frame 201 by reinforcing angle plates 307. The drive end of the fine-tuning push cylinder 305 is fixedly connected to the back of the mounting seat 306, and the mounting seat 306 has a concave cross-section when viewed from above. The reinforcing angle plates 307 ensure high stability in the transition positioning between the mounting square tube 301 and the mounting frame 201. The structural design of the mounting seat 306 ensures good stability during adjustment and provides a better mounting and transition effect for the mounting plate 401.

[0037] In this embodiment, specific references are made. Figure 1 , 3As shown in Figure 5, the sealing and fitting control mechanism 4 includes a mounting plate 401 installed on the front side of the mounting base 306. Second receiving sliders 402 are correspondingly arranged on the lower left and right sides of the front of the mounting plate 401. A matching second mounting slide rail 403 is slidably mounted on the second receiving sliders 402. A supporting square tube 404 is provided at the lower end of the second mounting slide rail 403. A positioning support plate 405 is provided in the middle of the upper front of the mounting plate 401. A control screw 406 is rotatably mounted in the middle of the positioning support plate 405. Guide rods 407 are symmetrically arranged on the positioning support plate 405 with the control screw 406 as the center line. A transmission track is provided on the upper side of the control screw 406. A drive motor 409 is provided on the upper right side of the front of the wheel 408 and the mounting plate 401. The drive end of the drive motor 409 is provided with a drive track wheel 410. The two ends of the supporting square tube 404 are provided with receiving plates 411. The front side of the receiving plate 411 is provided with a sealing element installation clamping assembly 5. The sealing and fitting adjustment mechanism 4 can realize the up and down movement adjustment of the sealing element installation clamping assembly 5, so that the sealing element installation clamping assembly 5 can better fit and position with the shield receiving tunnel, and thus the sealing element 513 in the sealing element installation clamping assembly 5 can better fit and transfer with the shield receiving tunnel, thereby improving the sealing effect of the shield receiving tunnel.

[0038] The drive track wheel 410 and the transmission track wheel 408 are connected by a matching track. The lower end of the adjusting screw 406 is threadedly connected to the supporting square tube 404, and the guide rod 407 is slidably connected to the supporting square tube 404. The adjusting screw 406 makes the adjustment and positioning of the supporting square tube 404 convenient, and the guide rod 407 makes the guiding and positioning of the supporting square tube 404 effective, thus ensuring high stability of the control and positioning of the sealing and fitting control mechanism 4.

[0039] In this embodiment, specific references are made. Figure 1 , 3As shown in Figures 5, 6, 7, and 8, the sealing component mounting clamping assembly 5 includes a loading square tube 501 mounted on the front side of the receiving plate 411. A connecting plate 502 is correspondingly arranged on the left and right sides of the front side of the loading square tube 501. A drive wheel 503 is mounted on the bottom of the connecting plate 502. The two sets of drive wheels 503 are connected by a drive belt 504. A mounting plate 505 is provided on the upper side of the loading square tube 501. An electric push rod 506 is mounted on the mounting plate 505. Correspondingly arranged on the lower sides of both ends of the loading square tube 501 are... A third mounting slide rail 507 is provided, on which a matching third receiving slider 508 is slidably mounted. A positioning clamping plate 509 is mounted on the third receiving slider 508. Connecting plates 510 are provided on the two sets of positioning clamping plates 509. A positioning plate 511 is provided on the lower inner wall of the positioning clamping plate 509. A clamping plate 512 is provided on the positioning plate 511. A sealing component 513 is mounted on the clamping plate 512. Grouting pipes 514 are correspondingly provided on the left and right sides of the front of the sealing component 513. The position of the sealing component 513 can be adjusted by the fine-tuning pushing mechanism 3, the sealing and fitting control mechanism 4, and the sealing component installation and clamping assembly 5, so that the sealing component 513 and the shield receiving tunnel portal have a good fitting and positioning effect, thereby achieving a good sealing and sealing effect of the sealing component 513 on the shield receiving tunnel portal.

[0040] The drive end of the electric push rod 506 is fixedly connected to one of the connecting plates 510. One connecting plate 510 is located at the rear of one end of the transmission belt 504 and is connected to the front of one end of the transmission belt 504. The connecting plate 510 is connected to the transmission belt 504 with fixing screws. The positioning clamp 509 is arranged in an "L" shape. The front and rear sides of the sealing member 513 are provided with positioning studs 515 on the left and right sides respectively. The clamping plate 512 is connected to the positioning studs 515 with fixing nuts. The inner wall of the sealing member 513 is hollow and a sealing gasket is provided on the inner ring wall of the sealing member 513. By positioning the connecting plates 510 at both ends of the transmission belt 504 and setting them one in front of the other, the connecting plates 510 can achieve good centering under the action of the transmission belt 504, thus making the installation, positioning and control of the sealing component 513 simple and convenient. The sealing gasket set on the inner ring wall of the sealing component 513 can achieve good sealing effect between the sealing component 513 and the shield receiving tunnel door.

[0041] In this scheme, the adjustable shield tunnel receiving portal sealing device controls the positioning and movement of the adjustable sealing component 2 through the movable support component 1, adjusts the height of the adjustable sealing component 2 through the scissor lift frame 101, and makes it easy and convenient to unfold or store the adjustable support foot 105 through the support arm 104. The adjustable support foot 105 ensures high positioning and support stability of the scissor lift frame 101, thereby achieving good positioning and usage effect of the adjustable sealing component 2.

[0042] After the movable support component 1 positions and adjusts the adjustable sealing component 2, the fine-tuning push cylinder 305 in the fine-tuning push mechanism 3 pushes the mounting seat 306, causing the mounting seat 306 to slide on the first mounting slide rail 302, thereby realizing the fine-tuning movement of the sealing fit adjustment mechanism 4. This allows the sealing component installation clamping component 5 to better correspond with the sealing part of the shield receiving tunnel, making the sealing docking operation of the shield receiving tunnel more convenient and the sealing efficiency of the shield structure tunnel door higher.

[0043] The electric push rod 506 pulls one of the connecting plates 510, causing the connecting plate 510 to slide and be positioned on the third mounting slide rail 507. Under the action of the connecting plate 510, the transmission belt 504 rotates on the transmission wheel 503, realizing the centering operation of the two side positioning clamps 509, realizing the position adjustment of the positioning plate 511, thus making the clamping plate 512 to clamp and transfer the sealing component 513 with high convenience. The grouting pipe 514 can be used to grout the sealing component 513 after it is fitted and positioned, thus making the sealing control effect of the shield receiving tunnel portal good.

[0044] The drive motor 409 drives the drive track wheel 410 and the transmission track wheel 408 to work. Under the action of the transmission track wheel 408, the control screw 406 is rotated. Under the action of the control screw 406, the position of the supporting square tube 404 is adjusted. When the position of the supporting square tube 404 is adjusted, the second mounting slide rail 403 runs on the second receiving slide block 402 to follow the supporting square tube 404. This makes the supporting square tube 404 highly stable during operation adjustment, and ensures a good fit between the upper and lower sets of sealing component installation and clamping assemblies 5 and the shield receiving tunnel door. As a result, the sealing component installation and clamping assembly 5 provides a good sealing effect for the shield receiving tunnel door.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable shield tunnel receiving portal sealing device, comprising a movable support assembly (1), characterized in that: The end face of the mobile support assembly (1) is provided with an adjustable sealing assembly (2). The mobile support assembly (1) includes a scissor lift frame (101), and universal wheels (102) are provided at the four bottom corners of the scissor lift frame (101). The adjustable sealing assembly (2) includes a mounting frame (201) installed on the end face of the scissor lift frame (101). The mounting frame (201) is provided with a fine-tuning push mechanism (3) on both the upper and lower sides. The fine-tuning push mechanism (3) includes mounting square tubes (301) installed on the left and right sides of the mounting frame (201). A first mounting slide rail (302) is installed on the inner wall of the mounting square tube (301). A matching first receiving slider (303) is slidably installed on the first mounting slide rail (302). A receiving cross plate (304) is provided between the two mounting square tubes (301). A fine-tuning push cylinder (305) is installed at the middle of the front side of the receiving cross plate (304). A mounting seat (306) is installed on the first mounting slide rail (302) through the first receiving slider (303). A sealing and fitting adjustment mechanism (4) is installed on the front side of the mounting seat (306). The sealing and fitting adjustment mechanism (4) includes a mounting plate (401) installed on the front side of the mounting base (306). Second receiving sliders (402) are correspondingly arranged on the lower left and right sides of the front of the mounting plate (401). A matching second mounting slide rail (403) is slidably mounted on the second receiving slider (402). A supporting square tube (404) is provided at the lower end of the second mounting slide rail (403). A positioning support plate (405) is provided at the middle of the upper front of the mounting plate (401). An adjustment screw is rotatably mounted at the middle of the positioning support plate (405). The positioning support plate (405) is symmetrically provided with guide rods (407) on the left and right sides based on the center line of the adjusting screw (406). The upper side of the adjusting screw (406) is provided with a transmission track wheel (408). The upper right side of the front of the mounting plate (401) is provided with a drive motor (409). The drive end of the drive motor (409) is provided with a drive track wheel (410). The two ends of the supporting square tube (404) are provided with receiving plates (411). The front side of the receiving plate (411) is provided with a sealing element installation clamping assembly (5). The sealing component mounting clamping assembly (5) includes a loading square tube (501) mounted on the front side of the receiving plate (411). Rotating plates (502) are correspondingly arranged on the left and right sides of the front side of the loading square tube (501). A transmission wheel (503) is mounted on the bottom of the rotating plate (502). The two sets of transmission wheels (503) are connected by a transmission belt (504). An mounting plate (505) is provided on the upper side of the loading square tube (501). An electric push rod (506) is mounted on the mounting plate (505). Third bearing slides are correspondingly arranged on the lower sides of both ends of the loading square tube (501). The third mounting slide rail (507) is slidably mounted with a matching third receiving slide block (508). The third receiving slide block (508) is mounted with a positioning clamp (509). The two sets of positioning clamps (509) are provided with connecting plates (510). The lower inner wall of the positioning clamp (509) is provided with a positioning plate (511). The positioning plate (511) is provided with a clamping plate (512). The clamping plate (512) is mounted with a sealing component (513). The sealing component (513) is provided with grouting pipes (514) on the left and right sides of its front side.

2. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The scissor lift frame (101) has a transition seat (103) on its left and right sides, and a support arm (104) is rotatably mounted on the transition seat (103). The other end of the support arm (104) is provided with an adjustable support foot (105).

3. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The two ends of the mounting square tube (301) are fixedly connected to the mounting frame (201) by reinforcing corner plates (307).

4. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The drive end of the fine-tuning push cylinder (305) is fixedly connected to the back of the mounting base (306), and the mounting base (306) has a concave cross-section when viewed from above.

5. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The drive track wheel (410) and the transmission track wheel (408) are connected by a matching track. The lower end of the adjusting screw (406) is threadedly connected to the supporting square tube (404). The guide rod (407) is slidably connected to the supporting square tube (404).

6. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The drive end of the electric push rod (506) is fixedly connected to one of the connecting plates (510).

7. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: One side of the connecting plate (510) is connected to the rear side of one end of the transmission belt (504), and the other side of the connecting plate (510) is connected to the front side of one end of the transmission belt (504). The connecting plate (510) is connected to the transmission belt (504) by fixing screws.

8. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The positioning clamp (509) is arranged in an "L" shape.

9. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The sealing component (513) has positioning studs (515) on its front and rear sides, and the clamping plate (512) is connected to the positioning studs (515) by a fixing nut.

10. The adjustable shield receiving portal sealing apparatus of claim 1, wherein: The inner wall of the sealing component (513) is hollow, and a sealing gasket is provided on the inner ring wall of the sealing component (513).

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