Full-circular needle beam trolley bottom pressure feeding device

Abstract

This invention relates to a bottom pressure feeding device for a full-circular needle beam trolley, belonging to the technical field of needle beam trolleys, and is used to solve the technical problem of honeycomb, pitting, and voids appearing in the concrete at the bottom of the lining when using a full-circular needle beam trolley in the prior art. The bottom pressure feeding device for a full-circular needle beam trolley includes a pump for conveying high-pressure concrete and a pipeline system for conveying the high-pressure concrete to various pouring points. The discharge port of the pump and the inlet of the pipeline system are connected through a conveying pipe. Through this structure, the high-pressure concrete is conveyed to the pipeline system by the pump, and then to each pouring point by the pipeline system. As the high-pressure concrete is continuously injected, air bubbles and accumulated water in the concrete are squeezed to the top, making the bottom concrete dense and smooth. Because of the pressure, the bottom pressure feeding device for a full-circular needle beam trolley provided by this invention will not produce honeycomb, pitting, or voids in the bottom lining concrete.

Description

Technical Field

[0001] This invention belongs to the technical field of needle beam trolleys, and specifically relates to a bottom pressure feeding device for a full-circle needle beam trolley. Background Technology

[0002] In today's world, with increasingly scarce energy resources and heightened emphasis on river development and protection, major water conservancy projects have emerged, demonstrating their comprehensive benefits in flood control, power generation, and navigation; the construction of water conservancy projects has become crucial to the national economy and people's livelihood. Various water conservancy project equipment are increasingly developing towards humanization, automation, improved construction efficiency and quality, and reduced labor costs. The full-circular needle beam trolley, as an important component in the construction of water conservancy tunnels, is no exception. After years of development, the performance of the full-circular needle beam trolley has improved in all aspects. However, when lining the bottom concrete, existing full-circular needle beam trolleys sometimes generate air bubbles and water accumulation in the concrete, leading to honeycomb-like pitting and voids in the bottom concrete. Summary of the Invention

[0003] This invention provides a bottom pressure feeding device for a full-circular needle beam trolley, which solves the technical problem of honeycomb pitting and voids in the concrete when lining the bottom concrete of a full-circular needle beam trolley in the prior art.

[0004] The present invention is achieved through the following technical solution: a pressure feeding device at the bottom of a full-circular needle beam trolley, comprising a pump for conveying high-pressure concrete and a pipeline system for conveying high-pressure concrete to various pouring points, wherein the outlet of the pump and the inlet of the pipeline system are connected by a conveying pipe.

[0005] Furthermore, to better realize the present invention, the pipeline system includes a first quick-connect pipe mechanism, a first connecting pipe, a second quick-connect pipe mechanism, a second connecting pipe, a first grouting pump pipe, a second grouting pump pipe, a third quick-connect pipe mechanism, a third grouting pump pipe, a third connecting pipe, a third quick-connect pipe mechanism, a fourth grouting pump pipe, a fifth grouting pump pipe, a sixth grouting pump pipe, and a grouting sealing mechanism. One end of the conveying pipe is connected to the discharge port, and the other end of the conveying pipe is connected to the first quick-connect pipe mechanism. The first quick-connect pipe mechanism and the second quick-connect pipe mechanism are connected through the first connecting pipe. The first grouting pump pipe and the second grouting pump pipe are connected through the first connecting pipe. All ends of the first grouting pump pipe are installed on the second quick-connect mechanism of the pipeline. The second quick-connect mechanism of the pipeline is connected to the third quick-connect mechanism of the pipeline through the second connecting pipe. One end of the third grouting pump pipe is fixedly installed on the third quick-connect mechanism of the pipeline. The third quick-connect mechanism of the pipeline is connected to the fourth pipeline connecting mechanism of the pipeline through the third connecting pipe. One end of the fourth grouting pump pipe, the fifth grouting pump pipe, and the sixth grouting pump pipe are all installed on the fourth pipeline connecting mechanism. The other end of the first grouting pump pipe, the second grouting pump pipe, the third grouting pump pipe, the fourth grouting pump pipe, the fifth grouting pump pipe, and the sixth grouting pump pipe are all equipped with a grouting sealing mechanism.

[0006] Furthermore, to better realize the present invention, both the first pipe quick connection mechanism and the third pipe quick connection mechanism are two-hole pipe connection mechanisms. The two-hole pipe connection device includes a first mounting plate, a first feed pipe, a first base plate, a first support plate, a first switching pipe, and a first handle. The first mounting plate and the first support plate are respectively installed on both sides of the first base plate. The first mounting plate has two first mounting holes adapted to the first feed pipe. Each first mounting hole has a first feed pipe fixedly installed in it. The first support plate has a first through hole adapted to the first switching pipe. One end of the first switching pipe is rotatably installed in the first through hole. The other end of the first switching pipe is connected to one of the two first feed pipes. The first handle is installed on the first switching pipe to rotate the first switching pipe.

[0007] The end of the delivery pipe away from the delivery pump is detachably and fixedly connected to the first switching pipe on the first pipe quick connection mechanism. The two first feed pipes on the first pipe quick connection mechanism are respectively equipped with one end of the arch grouting pump pipe and the first connecting pipe.

[0008] One end of the first switching pipe on the third pipe quick connection mechanism is connected to one end of the second connecting pipe, and one end of the third connecting pipe and one end of the third grouting pump pipe are respectively connected to one end of the two first feed pipes on the third pipe quick connection mechanism.

[0009] Furthermore, to better realize the present invention, both the second pipe quick connection mechanism and the fourth pipe connection mechanism are three-hole pipe connection mechanisms. The three-hole pipe connection device includes a second mounting plate, a second feed pipe, a second base plate, a second support plate, a second switching pipe, and a second handle. The second mounting plate and the second support plate are respectively installed on both sides of the second base plate. The second mounting plate has three second mounting holes adapted to the second feed pipe. A second feed pipe is fixedly installed in each second mounting hole. The second support plate has a second through hole adapted to the second switching pipe. One end of the second switching pipe is rotatably installed in the second through hole, and the other end of the second switching pipe is connected to one of the three second feed pipes. The second handle is installed on the second switching pipe to rotate the second switching pipe.

[0010] The other end of the first connecting pipe is detachably and fixedly connected to the second switching pipe on the second pipe quick connection mechanism. The first grouting pump pipe, the second grouting pump pipe and one end of the second connecting pipe are respectively installed on the three second feed pipes on the second pipe quick connection mechanism.

[0011] One end of the second switching pipe on the fourth pipe connection mechanism is connected to the other end of the third connecting pipe, and one end of the fourth grouting pump pipe, the fifth grouting pump pipe and the fifth grouting pump pipe are respectively connected to one end of the three second feed pipes on the fourth pipe connection mechanism.

[0012] Furthermore, to better realize the present invention, the grouting and sealing mechanism includes a double-hole sliding plate, two sliding plate pressure strips, two sliding plate limiting strips, a grouting pipe, a sealing pipe, a sealing disc, and a hydraulic cylinder. The two sliding plate limiting strips are fixedly installed on the template panel. The double-hole sliding plate is slidably installed between the two limiting strips. The two sliding plate pressure strips are detachably and fixedly installed on the two limiting strips to press the double-hole sliding plate onto the template panel. The grouting pipe and the sealing pipe are both fixedly installed on the double-hole sliding plate. The grouting pipe and the sealing pipe are respectively located at the double holes. The sealing disc is slidably installed inside the sealing pipe. The fixed end of the hydraulic cylinder abuts against the template arc plate, and the telescopic end of the hydraulic cylinder abuts against the sealing pipe to push the double-hole sliding plate to move.

[0013] Furthermore, in order to better realize the present invention, a positioning plate is installed at the opening of the sealing tube, and a threaded hole is opened at the center of the positioning plate. A threaded push rod is screwed into the threaded hole, and one end of the threaded push rod extends into the sealing tube to push the sealing disc inside the sealing tube to move downward.

[0014] Furthermore, in order to better realize the present invention, a number of limiting blocks are fixedly installed on the template panel.

[0015] Furthermore, in order to better realize the present invention, the number of the limiting blocks is four, and the four limiting blocks are respectively installed at both ends of the two limiting strips.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The bottom pressure feeding device for a full-circular needle beam trolley provided by this invention includes a conveying pump for conveying high-pressure concrete and a pipeline system for conveying high-pressure concrete to various pouring points. The discharge port of the conveying pump and the inlet of the pipeline system are connected through a conveying pipe. Through this structure, the high-pressure concrete is conveyed to the pipeline system by the conveying pump, and then to each pouring point by the pipeline system. As the high-pressure concrete is continuously injected, the pressure forces air bubbles and accumulated water in the concrete to the upper part, making the bottom concrete dense, smooth, and flat, without honeycomb pits or voids, thus improving the surface quality of the concrete. Because of the pressure, the bottom pressure feeding device for a full-circular needle beam trolley provided by this invention will not produce honeycomb pits or voids in the bottom concrete of the lining. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the bottom pressure feeding device of the full-circle needle beam trolley provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the two-hole pipe connection mechanism in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the three-hole pipe connection mechanism in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the grouting and sealing mechanism in an embodiment of the present invention.

[0023] In the picture:

[0024] 1-Transfer pump; 11-Transfer pipe;

[0025] 2- First pipe quick connection mechanism;

[0026] 3-Second pipe quick connection mechanism;

[0027] 4- Third pipe quick connection mechanism;

[0028] 5-Fourth pipe connection mechanism;

[0029] 6-First connecting pipe; 61-Second connecting pipe; 62-Third connecting pipe;

[0030] 7-First grouting pump pipe; 71-Second grouting pump pipe; 72-Third grouting pump pipe; 73-Fourth grouting pump pipe; 74-Fifth grouting pump pipe; 75-Sixth grouting pump pipe;

[0031] 8-Grouting and sealing mechanism; 81-Double-hole sliding plate; 82-Sliding plate pressure strip; 83-Sliding plate limit strip; 84-Grouting pipe; 85-Sealing pipe; 86-Sealing disc; 87-Hydraulic cylinder;

[0032] 9-Positioning plate; 91-Threaded push rod;

[0033] 10-Limit Block;

[0034] 100 - First mounting plate; 101 - First feed pipe; 102 - First base plate; 103 - First support plate; 104 - First switching pipe; 105 - First handle;

[0035] 200 - Second mounting plate; 201 - Second feed pipe; 202 - Second base plate; 203 - Second support plate; 204 - Second switching pipe; 205 - Second handle. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0037] Example 1:

[0038] This embodiment provides a bottom pressure feeding device for a full-circular needle beam trolley to solve the technical problems of honeycomb, pitting, and voids in the concrete during the lining of the bottom concrete in existing full-circular needle beam trolleys. The bottom pressure feeding device includes a pump for conveying high-pressure concrete and a pipeline system for conveying the high-pressure concrete to various pouring points, wherein:

[0039] The discharge port of the aforementioned pump is connected to the inlet of the aforementioned pipeline system via a delivery pipe. In this way, the high-pressure concrete is delivered to the pipeline system through the delivery pipe. The pressure of the concrete causes air bubbles and accumulated water in the bottom concrete to be squeezed upwards to the surface of the concrete during pouring, thus preventing honeycomb and voids from appearing in the bottom concrete.

[0040] The pipeline system delivers high-pressure concrete to each pouring point, reducing the time required to replace pipelines at the pouring point and improving the efficiency of lining.

[0041] Through the above structure, high-pressure concrete is transported to the pipeline system via a delivery pump, and then the high-pressure concrete is transported to each pouring point via the pipeline system. As the high-pressure concrete is continuously injected, the pressure squeezes the air bubbles and water in the concrete to the top, making the bottom concrete dense, smooth and flat, without honeycomb pits or voids, thus improving the surface quality of the concrete. Because of the pressure, the bottom pressure feeding device of the full-circle needle beam trolley provided by this invention will not produce honeycomb pits or voids in the bottom concrete of the lining.

[0042] An optional implementation of this embodiment is as follows: The pipeline system includes a first quick-connect mechanism, a first connecting pipe, a second quick-connect mechanism, a second connecting pipe, a first grouting pump pipe, a second grouting pump pipe, a third quick-connect mechanism, a third grouting pump pipe, a third connecting pipe, a third quick-connect mechanism, a fourth grouting pump pipe, a fifth grouting pump pipe, a sixth grouting pump pipe, and a grouting sealing mechanism. One end of the conveying pipe is connected to the discharge port, and the other end of the conveying pipe is connected to the first quick-connect mechanism. The first quick-connect mechanism and the second quick-connect mechanism are connected through the first connecting pipe. The first grouting pump pipe and the second grouting pump pipe are connected through the first connecting pipe. All ends of the first, second, and sixth grouting pump pipes are installed on the second quick-connect mechanism. The second quick-connect mechanism is connected to the third quick-connect mechanism via the second connecting pipe. One end of the third grouting pump pipe is fixedly installed on the third quick-connect mechanism, which is connected to the fourth quick-connect mechanism via the third connecting pipe. One end of each of the fourth, fifth, and sixth grouting pump pipes is installed on the fourth quick-connect mechanism. The other end of each of the first, second, third, fourth, fifth, and sixth grouting pump pipes is equipped with a grouting sealing mechanism. Through this structure, the pipes are connected together via the pipe connection mechanism, allowing concrete to reach the pouring point. After pouring, the grouting port is sealed by the grouting sealing mechanism.

[0043] An optional implementation of this embodiment is as follows: Both the first pipe quick connection mechanism and the third pipe quick connection mechanism are two-hole pipe connection mechanisms. The two-hole pipe connection device includes a first mounting plate, a first feed pipe, a first base plate, a first support plate, a first switching pipe, and a first handle. The first mounting plate and the first support plate are respectively installed on both sides of the first base plate. The first mounting plate has two first mounting holes adapted to the first feed pipe. Each of the first mounting holes is fixedly installed with one of the first feed pipes. The first support plate has a first through hole adapted to the first switching pipe. One end of the first switching pipe is rotatably installed in the first through hole, and the other end of the first switching pipe is connected to one of the two first feed pipes. The first handle is installed on the first switching pipe to rotate the first switching pipe.

[0044] The end of the aforementioned conveying pipe away from the aforementioned conveying pump is detachably and fixedly connected to the aforementioned first switching pipe on the aforementioned first pipe quick connection mechanism. The two aforementioned first feed pipes on the aforementioned first pipe quick connection mechanism are respectively equipped with one end of the arch grouting pump pipe and the aforementioned first connecting pipe.

[0045] One end of the first switching pipe on the aforementioned third pipe quick connection mechanism is connected to one end of the aforementioned second connecting pipe, and one end of the aforementioned third connecting pipe and one end of the aforementioned third grouting pump pipe are respectively connected to one end of the two aforementioned first feed pipes on the aforementioned third pipe quick connection mechanism.

[0046] The above structure, with its switching pipe, makes it easier for workers to control the flow of concrete and improves the efficiency of pouring.

[0047] An optional implementation of this embodiment is as follows: Both the second pipe quick connection mechanism and the fourth pipe connection mechanism are three-hole pipe connection mechanisms. The three-hole pipe connection device includes a second mounting plate, a second feed pipe, a second base plate, a second support plate, a second switching pipe, and a second handle. The second mounting plate and the second support plate are respectively installed on both sides of the second base plate. The second mounting plate has three second mounting holes adapted to the second feed pipe. Each of the second mounting holes has a second feed pipe fixedly installed in it. The second support plate has a second through hole adapted to the second switching pipe. One end of the second switching pipe is rotatably installed in the second through hole, and the other end of the second switching pipe is connected to one of the three second feed pipes. The second handle is installed on the second switching pipe to rotate the second switching pipe.

[0048] The other end of the first connecting pipe is detachably and fixedly connected to the second switching pipe on the second pipe quick connection mechanism. The first grouting pump pipe, the second grouting pump pipe and one end of the second connecting pipe are respectively installed on the three second feed pipes on the second pipe quick connection mechanism.

[0049] One end of the second switching pipe on the fourth pipe connection mechanism is connected to the other end of the third connection pipe. One end of the fourth grouting pump pipe, the fifth grouting pump pipe and the fifth grouting pump pipe are respectively connected to one end of the three second feed pipes on the fourth pipe connection mechanism.

[0050] An optional implementation of this embodiment is as follows: The grouting and sealing mechanism includes a double-hole sliding plate, two sliding plate pressure strips, two sliding plate limiting strips, a grouting pipe, a sealing pipe, a sealing disc, and a hydraulic cylinder. The two sliding plate limiting strips are fixedly installed on the template panel. The double-hole sliding plate is slidably installed between the two limiting strips. The two sliding plate pressure strips are detachably and fixedly installed on the two limiting strips to press the double-hole sliding plate onto the template panel. The grouting pipe and the sealing pipe are fixedly installed on the double-hole sliding plate. The grouting pipe and the sealing pipe are respectively located at the double holes. The sealing disc is slidably installed inside the sealing pipe. The fixed end of the hydraulic cylinder abuts against the template arc plate, and the telescopic end of the hydraulic cylinder abuts against the sealing pipe to push the double-hole sliding plate to move. In this way, the concrete is transported to the pouring point through the grouting pipe. After grouting is completed, the hydraulic cylinder pushes the double-hole sliding plate so that the sealing pipe is aligned with the grouting hole. Then, the sliding sealing plate moves downward until the grouting hole is sealed. The hydraulic cylinder allows the sealing pipe to be moved to the grouting hole quickly after pouring, and the sealing plate is used in time to seal the grouting hole to prevent concrete bulges. The two sliding plate limit strips prevent the double-hole sliding plate from tilting during movement.

[0051] An optional implementation of this embodiment is as follows: A positioning plate is installed at the opening of the sealing pipe. A threaded hole is opened at the center of the positioning plate. A threaded push rod is screwed into the threaded hole. One end of the threaded push rod extends into the sealing pipe to push the sealing disc inside the sealing pipe to move downward. In this way, the positioning plate prevents concrete from entering the sealing pipe and causing the threaded push rod to become unusable. The cooperation between the threaded push rod and the threaded hole on the positioning plate makes it easy to seal the sealing disc on the grouting hole.

[0052] An optional implementation of this embodiment is as follows: Several limiting blocks are fixedly installed on the template panel. In this way, the setting of the limiting blocks restricts the double-hole slide plate within a certain distance.

[0053] Optionally, the number of the above-mentioned limiting blocks is four, and the four limiting blocks are respectively installed at both ends of the above-mentioned two limiting strips. In this way, the four limiting blocks enable the oil cylinder to push the sealing pipe to the grouting hole more accurately and prevent the oil cylinder from pushing the double-hole sliding plate away from the target point.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A bottom pressure feeding device for a full-circular needle beam trolley, characterized in that: It includes a delivery pump for conveying high-pressure concrete and a pipeline system for conveying high-pressure concrete to various pouring points, wherein the discharge port of the delivery pump and the inlet of the pipeline system are connected through a delivery pipe. The pipeline system includes a first quick-connect mechanism, a first connecting pipe, a second quick-connect mechanism, a second connecting pipe, a first grouting pump pipe, a second grouting pump pipe, a third quick-connect mechanism, a third grouting pump pipe, a third connecting pipe, a third quick-connect mechanism, a fourth grouting pump pipe, a fifth grouting pump pipe, a sixth grouting pump pipe, and a grouting sealing mechanism. One end of the conveying pipe is connected to the outlet, and the other end of the conveying pipe is connected to the first quick-connect mechanism. The first quick-connect mechanism and the second quick-connect mechanism are connected through the first connecting pipe. One end of each of the first and second grouting pump pipes is installed in the [unclear - likely a grouting mechanism]. On the second quick-connect pipe mechanism, the second quick-connect pipe mechanism is connected to the third quick-connect pipe mechanism through the second connecting pipe. One end of the third grouting pump pipe is fixedly installed on the third quick-connect pipe mechanism. The third quick-connect pipe mechanism is connected to the fourth pipe connection mechanism through the third connecting pipe. One end of the fourth grouting pump pipe, the fifth grouting pump pipe, and the sixth grouting pump pipe are all installed on the fourth pipe connection mechanism. The other end of the first grouting pump pipe, the second grouting pump pipe, the third grouting pump pipe, the fourth grouting pump pipe, the fifth grouting pump pipe, and the sixth grouting pump pipe are all equipped with a grouting sealing mechanism. The grouting and sealing mechanism includes a double-hole sliding plate, two sliding plate pressure strips, two sliding plate limiting strips, a grouting pipe, a sealing pipe, a sealing disc, and a hydraulic cylinder. The two sliding plate limiting strips are fixedly installed on the template panel. The double-hole sliding plate is slidably installed between the two limiting strips. The two sliding plate pressure strips are detachably and fixedly installed on the two sliding plate limiting strips to press the double-hole sliding plate onto the template panel. The grouting pipe and the sealing pipe are both fixedly installed on the double-hole sliding plate. The grouting pipe and the sealing pipe are located at the double holes. The sealing disc is slidably installed inside the sealing pipe. The fixed end of the hydraulic cylinder abuts against the template arc plate, and the telescopic end of the hydraulic cylinder abuts against the sealing pipe to push the double-hole sliding plate to move. Both the first and third quick-connect pipe mechanisms are two-hole pipe connection mechanisms. The two-hole pipe connection mechanism includes a first mounting plate, a first feed pipe, a first base plate, a first support plate, a first switching pipe, and a first handle. The first mounting plate and the first support plate are respectively mounted on both sides of the first base plate. The first mounting plate has two first mounting holes adapted to the first feed pipe. Each first mounting hole has a first feed pipe fixedly installed in it. The first support plate has a first through hole adapted to the first switching pipe. One end of the first switching pipe is rotatably installed in the first through hole, and the other end of the first switching pipe is connected to one of the two first feed pipes. The first handle is mounted on the first switching pipe to rotate the first switching pipe. The end of the delivery pipe away from the delivery pump is detachably and fixedly connected to the first switching pipe on the first pipe quick connection mechanism. The two first feed pipes on the first pipe quick connection mechanism are respectively equipped with one end of the arch grouting pump pipe and the first connecting pipe. One end of the first switching pipe on the third pipe quick connection mechanism is connected to one end of the second connecting pipe, and one end of the third connecting pipe and one end of the third grouting pump pipe are respectively connected to one end of the two first feed pipes on the third pipe quick connection mechanism. Both the second quick-connect pipe mechanism and the fourth pipe connection mechanism are three-hole pipe connection mechanisms. The three-hole pipe connection mechanism includes a second mounting plate, a second feed pipe, a second base plate, a second support plate, a second switching pipe, and a second handle. The second mounting plate and the second support plate are respectively installed on both sides of the second base plate. The second mounting plate has three second mounting holes adapted to the second feed pipe. Each second mounting hole has a second feed pipe fixedly installed in it. The second support plate has a second through hole adapted to the second switching pipe. One end of the second switching pipe is rotatably installed in the second through hole, and the other end of the second switching pipe is connected to one of the three second feed pipes. The second handle is installed on the second switching pipe to rotate the second switching pipe. The other end of the first connecting pipe is detachably and fixedly connected to the second switching pipe on the second pipe quick connection mechanism. The first grouting pump pipe, the second grouting pump pipe and one end of the second connecting pipe are respectively installed on the three second feed pipes on the second pipe quick connection mechanism. One end of the second switching pipe on the fourth pipe connection mechanism is connected to the other end of the third connecting pipe, and one end of the fourth grouting pump pipe, the fifth grouting pump pipe and the fifth grouting pump pipe are respectively connected to one end of the three second feed pipes on the fourth pipe connection mechanism.

2. The bottom pressure feeding device of the full-circle needle beam trolley according to claim 1, characterized in that: A positioning plate is installed at the opening of the sealing tube. A threaded hole is opened at the center of the positioning plate. A threaded push rod is screwed into the threaded hole. One end of the threaded push rod extends into the sealing tube to push the sealing disc inside the sealing tube to move downward.

3. The bottom pressure feeding device of the full-circle needle beam trolley according to claim 2, characterized in that: Several limiting blocks are fixedly installed on the template panel.

4. The bottom pressure feeding device of the full-circle needle beam trolley according to claim 3, characterized in that: The number of limiting blocks is four, and the four limiting blocks are respectively installed at both ends of the two limiting strips.

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