Shield tail brush stress detection assembly

Abstract

The utility model provides a shield tail brush stress detection assembly which is arranged on at least one group of shield tail brushes and comprises at least one fixing piece, a first sensor and a second sensor, the fixing piece is arranged on a bottom plate at the end of the shield tail brush, and the first fastening piece sequentially penetrates through the fixing piece and the bottom plate to fix the shield tail brush to a shield tail. A first sensor is arranged on the first face of the fixing piece and used for detecting the shield tail grease pressure in the shield tail grease cavity. A second sensor is arranged on the second face of the fixing piece and used for detecting the shield tail grease pressure in the shield tail grease cavity and the pressure provided by the bottom plate. Wherein the first surface and the second surface are opposite surfaces of the fixing piece. The two sensors can be used for collecting the shield tail grease pressure in the shield tail grease cavity and the pressure provided by the bottom plate; through comparison and analysis of the pressure values, the abrasion condition of the shield tail brush can be obtained through changes of the pressure values, the situation that the shield tail sealing performance is reduced due to abrasion is avoided, assembly installation is convenient, and cost is low.

Description

Technical Field

[0001] The utility model relates to the field of shield machines, in particular to a shield tail brush of a shield machine. Background Art

[0002] As cross-river and sea tunnels become increasingly common, shield tunneling operations are characterized by large diameters, high water pressures, and long distances, posing significant challenges to the safety of shield machines in tunneling projects. These high water pressures and long distances place higher demands on the shield tail seal. The wear and resilience of the tail brush can affect the seal performance, with the stress on the brush being the primary factor affecting brush wear. Summary of the Invention

[0003] Purpose of the invention: The purpose of this utility model is to address the deficiencies of the existing technology and provide a shield tail brush force detection component that is convenient for collecting the pressure of the shield tail brush grease chamber and the force on the shield tail brush base plate.

[0004] Technical solution: The utility model discloses a shield tail brush force detection assembly, wherein a shield tail brush is installed along the length direction of the shield tail, and at least one group of shield tail brushes is provided with a force detection assembly, and the force detection assembly includes:

[0005] At least one fixing member, the fixing member is arranged on the bottom plate of the end of the shield tail brush, and the first fastener passes through the fixing member and the bottom plate in sequence to fix the shield tail brush on the shield tail;

[0006] A first sensor is provided on the first surface of the fixing member for detecting the shield tail grease pressure in the shield tail grease cavity;

[0007] A second sensor is provided on the second surface of the fixing member, for detecting the shield tail grease pressure in the shield tail grease cavity and the pressure provided by the bottom plate; wherein the first surface and the second surface are opposite surfaces of the fixing member.

[0008] Furthermore, a wire outlet hole is provided on the fixing member, and the wires of the first sensor and the second sensor are led out from the wire outlet hole.

[0009] Furthermore, a guide piece is fixed on the shield tail, and a penetrating guide hole is constructed in the guide piece, and the guide hole leads the outgoing wires of the first sensor and the second sensor to the wiring hole on the shield tail.

[0010] Furthermore, the first end of the guide hole faces the fixing member, and the second end of the guide hole is connected to the wiring hole.

[0011] Furthermore, the guide hole is sealed with glue.

[0012] Furthermore, the guide hole includes a glue filling hole and a lateral hole. The glue filling hole is connected to the wiring hole and provides a glue filling channel. The lateral hole provides a channel for the output wires of the first sensor and the second sensor to enter the glue filling hole.

[0013] Furthermore, the fixing member is provided with a wire outlet hole, and the wires of the first sensor and the second sensor are led out from the wire outlet hole. The wire outlet hole is provided on the side of the fixing member facing the lateral hole.

[0014] Furthermore, a second fastener is screwed into the glue injection hole.

[0015] Furthermore, the reserved depth in the glue filling hole is smaller than the length of the second fastener.

[0016] Beneficial effects: The utility model sets a fixing part at the bottom plate position of the shield tail brush, and installs a first sensor and a second sensor on the opposite surfaces of the fixing part respectively. The two sensors can be used to collect the shield tail grease pressure in the shield tail grease cavity and the pressure provided by the bottom plate; by comparing and analyzing the pressure values, the wear condition of the shield tail brush can be obtained through the change of the pressure value, avoiding the reduction of the shield tail sealing performance caused by wear. The components are easy to install and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the shield tail brush force detection component of the utility model;

[0018] Figure 2 It is a side view of the fixing member facing the guide member. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0020] A shield tail brush force detection assembly is described. Shield tail brushes 9 are installed along the length of the shield tail 11. Generally, at least three shield tail brushes 3 are installed on the shield tail 11. The brush bodies of the shield tail brushes 9 contact the concrete segments, forming a shield tail grease cavity between all the brushes 9 and the segments. Wear of the shield tail brushes 9 can affect their sealing performance and cause grease leakage. To address this issue, this solution incorporates a force detection assembly on at least one group of the shield tail brushes 9 on the shield tail 11. This assembly can be used to detect the force applied to the brushes 9 and determine whether they are worn based on the force applied.

[0021] like Figure 1As shown, the force detection assembly includes at least one fixing member 1, a first sensor 2, and a second sensor 5. The fixing member 1 is set on the base plate 10 at the end of the shield tail brush 9. The first fastener passes through the fixing member 1 and the base plate 10 in sequence to fix the shield tail brush 9 to the shield tail 11. It can be imagined that there is a gap between the fixing member 1 and the base plate 10 of the shield tail brush 9 for grease filling. At the same time, the first fastener can simultaneously fix the fixing member 1 and the base plate 10 to the shield tail 11.

[0022] For ease of installation, corresponding screw holes 3 are required on the fixture 1 and base plate 10. Screws can be used as the first fasteners. To ensure secure fixation, at least two sets of screw holes 3 are required on the fixture 1 and base plate 10, evenly distributed across the bearing surfaces of the fixture 1 and base plate 10. The screws pass through the corresponding screw holes 3 to secure the fixture 1 and base plate 10 to the shield tail 11.

[0023] During installation, the base plate 10 may be provided with a mounting groove into which the fixing member 1 is embedded. For example, if the cross-section of the fixing member 1 is an elongated rectangle, a corresponding mounting groove of the same shape may be provided on the base plate 10. During installation, the fixing member 1 can be directly placed in the mounting groove to complete the positioning of the fixing member 1, simplifying the installation process.

[0024] like Figure 2 As shown, the first surface of the fixing member 1 is provided with a first sensor 2 for detecting the grease pressure in the grease cavity of the shield tail 11. The grease cavity of the shield tail brush 9 here refers to the cavity between the shield tail brush 9 and the tube segment. Therefore, the first surface of the fixing member 1 corresponds to the side of the fixing member 1 facing away from the shield tail 11, as shown in the figure, which is the A surface.

[0025] A second sensor 5 is provided on the second surface of the fixing member 1, which is used to detect the shield tail grease pressure in the grease chamber of the shield tail 11 and the pressure provided by the base plate 10; the first and second surfaces are the opposing surfaces of the fixing member 1. Due to the contact between the fixing member 1 and the base plate 10, the flowing grease will enter the gap between the contact surfaces, so the second sensor 5 can detect the grease pressure and the pressure exerted by the base plate 10 on the fixing member 1. Here, the grease pressure is equal to the grease pressure measured by the first sensor 2. Because the distance between the pipe segment and the shield tail brush 9 changes with the wear of the shield tail brush 9, the pressure exerted by the base plate 10 on the fixing member 1 changes accordingly, so the second sensor 5 can detect it. The second surface is the side surface of the fixing member 1 facing the shield tail 11, as shown in the figure, which is surface B.

[0026] The fixing member 1 is provided with a wire outlet hole 4 , which communicates with the first surface and the second surface of the fixing member 1 .

[0027] The outgoing wires of the first sensor 2 and the second sensor 5 need to be arranged in a fixed manner in the shield tail 11. Otherwise, the chaotic sensor wiring may cause safety accidents and it is inconvenient to replace the sensors and their outgoing wires. Therefore, the present application can fix a guide member 6 on the shield tail 11. The guide member 6 is constructed with a through guide hole. The guide hole leads the outgoing wires of the first sensor 2 and the second sensor 5 to the wiring hole on the shield tail 11. The wiring hole is a through hole that runs along the length of the shield tail 11. The outgoing wires of the sensors at the tail of the shield tail 11 can all pass through the wiring hole and be led out from the front end of the shield tail 11 to connect to other electrical components.

[0028] Specifically, the direction of the guide hole can be that the first end faces the fixing part 1, and the second end is connected to the wiring hole of the shield tail brush 9. In this form, the sensor output line can reach the wiring hole through the shortest distance, making the wiring simpler. The guide hole is set according to the rules of the above form. Here, one of the implementation forms is provided. The guide hole includes a longitudinal glue hole 7 and a transverse lateral hole 8. The glue hole 7 and the lateral hole 8 intersect in the guide part 6. Among them, the guide part 6 is set as an open mouth of the lateral hole 8 on the surface facing the fixing part 1. The top of the glue hole 7 is used for glue filling operation, and the bottom end is connected to the wiring hole of the shield tail 11. Therefore, the output lines of the first sensor 2 and the second sensor 5 pass through the lateral hole 8 and the glue hole 7 and then enter the wiring hole. The glue seal can seal the port of the wiring hole so that the wiring hole and the entire grease cavity of the shield tail 11 will not leak.

[0029] In addition, a second fastener can be screwed into the glue hole 7 to seal the upper portion of the glue hole 7, preventing excessive grease pressure at the shield tail from causing the solidified glue in the glue hole 7 to return to the wiring hole. After the glue is injected into the glue hole 7 and sealed, the reserved glue depth in the glue hole 7 is less than the length of the second fastener, and the glue hole is then sealed with the second fastener.

[0030] On the premise of providing the lateral hole 8, the outlet hole 4 on the fixing member 1 can be set on the side of the fixing member 1. The outlet wires of the first sensor 2 and the second sensor 5 can be led out from the interior of the fixing member 1 through the lateral outlet hole 4 and directly enter the lateral hole 8 through the shortest straight line distance. It can be seen here that the positions of the outlet hole 4 and the guide hole can be adjusted accordingly, as long as the sensor outlet wires can enter the wiring hole of the shield tail 11 through a relatively short distance. There are many possible implementation forms, and no specific restrictions are set here.

[0031] In this solution, the data collected by the first sensor 2 and the second sensor 5 can be transmitted to the host computer, and the host computer can judge the stress condition of the shield tail brush 9.

[0032] As one of the implementation methods, the PLC receives data from the first sensor 2 and the second sensor 5 of all force detection components on the shield tail 11 and transmits it to the host computer. The host computer uses existing data processing software to compare and process the data to obtain the force condition of the shield tail brush 9.

[0033] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A shield tail brush force detection assembly, with a shield tail brush installed along the length direction of the shield tail, characterized in that: At least one set of shield tail brushes is provided with a force detection component, the force detection component comprising: At least one fixing member, the fixing member is arranged on the bottom plate of the end of the shield tail brush, and the first fastener passes through the fixing member and the bottom plate in sequence to fix the shield tail brush on the shield tail; A first sensor is provided on the first surface of the fixing member for detecting the shield tail grease pressure in the shield tail grease cavity; A second sensor is provided on the second surface of the fixing member, for detecting the shield tail grease pressure in the shield tail grease cavity and the pressure provided by the bottom plate; wherein the first surface and the second surface are opposite surfaces of the fixing member.

2. The shield tail brush force detection assembly according to claim 1, characterized in that: The fixing member is provided with a wire outlet hole, and the wires of the first sensor and the second sensor are led out from the wire outlet hole.

3. The shield tail brush force detection assembly according to claim 1, characterized in that: A guide piece is fixed on the shield tail, and a penetrating guide hole is constructed in the guide piece. The guide hole leads the outgoing wires of the first sensor and the second sensor to the wiring hole on the shield tail.

4. The shield tail brush force detection assembly according to claim 3, characterized in that: The first end of the guide hole faces the fixing member, and the second end of the guide hole is connected to the wiring hole.

5. The shield tail brush force detection assembly according to claim 3, characterized in that: The guide hole is sealed with glue.

6. The shield tail brush force detection assembly according to claim 5, characterized in that: The guide hole includes a glue filling hole and a lateral hole. The glue filling hole is connected to the wiring hole and provides a glue filling channel. The lateral hole provides a channel for the outlet wires of the first sensor and the second sensor to enter the glue filling hole.

7. The shield tail brush force detection assembly according to claim 6, characterized in that: The fixing member is provided with a wire outlet hole, and the wires of the first sensor and the second sensor are led out from the wire outlet hole. The wire outlet hole is provided on the side of the fixing member facing the lateral hole.

8. The shield tail brush force detection assembly according to claim 6, characterized in that: A second fastener is screwed into the glue injection hole.

9. The shield tail brush force detection assembly according to claim 8, characterized in that: The reserved depth in the glue injection hole is smaller than the length of the second fastener.

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