CN216951654U - Shield constructs owner and drives sealing system that possesses initiative accuse temperature function - Google Patents
Shield constructs owner and drives sealing system that possesses initiative accuse temperature function Download PDFInfo
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- CN216951654U CN216951654U CN202220619301.2U CN202220619301U CN216951654U CN 216951654 U CN216951654 U CN 216951654U CN 202220619301 U CN202220619301 U CN 202220619301U CN 216951654 U CN216951654 U CN 216951654U
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Abstract
The utility model discloses a shield machine main drive sealing system with an active temperature control function, which comprises a main drive sealing ring, a sealing friction plate and a cold and hot water circulation cavity, wherein the main drive sealing ring is arranged on the main drive sealing ring; the friction surface of the main driving sealing ring is attached to the annular sealing friction plate; the sealing friction plate covers the surface of the cold and hot water circulation cavity; the cold and hot water circulation cavity is an annular cavity, and at least two water inlets and water outlets are formed in the wall of the cavity; and a separation baffle is arranged between the water inlet and the water outlet in the cold and hot water circulation cavity. The shield machine main drive sealing system with the active temperature control function ensures that the shield machine main drive seal is always in the optimal working temperature range, thereby greatly improving the reliability of the main drive seal work and improving the engineering adaptability of the shield machine in alpine/high-heat areas.
Description
Technical Field
The utility model belongs to the technical field of shield tunneling machines, and particularly relates to a shield tunneling machine main drive sealing system with an active temperature control function.
Background
With the increasing number of tunnel projects at home and abroad, the shield machine is being widely used as a sharp tool for tunnel construction. In order to promote the technical upgrade of the shield machine equipment and further improve the engineering adaptability of the shield machine in the alpine/high-heat regions, a technical research needs to be carried out on a main driving sealing system, which is a key core component of the shield machine.
The main driving sealing structure commonly used in the shield machine industry at present is a multi-layer multi-channel/multi-sealing arrangement combination type (as shown in the following figures), but research on active monitoring and control is often lacked for the actual working temperature of the main driving sealing.
The friction heat generated by the main driving sealing ring in the operation process is often accumulated on the main driving sealing cavity and the main driving sealing friction surface, so that the effective heat is difficult to be dispersed and cooled. Although lubricating grease continuously filled between the main driving sealing rings can dissipate part of friction heat, the cooling effect is still slight.
When the main driving sealing ring continuously rubs and rotates for a long time, the friction surface generates high heat. This heat value will cause a reduction in the physical and mechanical properties (e.g., tear strength) of the primary drive seal, thereby reducing the operational reliability of the primary drive seal structure.
The aging speed of the main drive sealing material is accelerated under the working environment with continuous high temperature, so that the service life of the main drive sealing structure is shortened.
In order to meet the engineering requirements of high-cold/high-heat areas, the design of the common shield machine main drive sealing structure usually selects a main drive sealing material (such as low-temperature-resistant hydrogenated nitrile rubber and high-temperature-resistant fluororubber) with higher low temperature resistance or higher temperature resistance. However, the cost of the main driving sealing material which is more resistant to low temperature or high temperature is higher (for example, the price of hydrogenated nitrile rubber is more than 2 times of the price of conventional nitrile rubber, and the price of fluororubber is more than 3 times of the price of conventional nitrile rubber), so that the manufacturing cost of the shield machine is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a shield machine main driving sealing system with an active temperature control function, and aims to ensure that the shield machine main driving sealing system is always in an optimal working temperature range through the system, so that the reliability of the main driving sealing work is greatly improved, and the engineering adaptability of a shield machine in high-cold/high-heat areas is improved.
In order to achieve the aim, the technical scheme of the utility model is to design a shield machine main driving sealing system with an active temperature control function, which comprises a main driving sealing ring, a sealing friction plate and a cold and hot water circulation cavity; the friction surface of the main driving sealing ring is attached to the annular sealing friction plate; the sealing friction plate covers the surface of the cold and hot water circulation cavity; the cold and hot water circulation cavity is an annular cavity, and at least two water inlets and outlets are arranged on the wall of the cavity; and a separation baffle is arranged between the water inlet and the water outlet inside the cold and hot water circulation cavity.
Furthermore, the sealing friction plate is made of a wear-resistant steel plate, and the wear-resistant steel plate is covered on the surface of the cold and hot water circulation cavity in a watertight welding mode at two ends after being rolled.
Further, the thickness of the wear-resistant steel plate ranges from 10 mm to 15 mm.
Further, the device also comprises a sealing grease injection pipe; the sealing grease injection pipe penetrates through the cold and hot water circulation cavity and the sealing friction plate and leads to the contact surface of the main driving sealing ring and the sealing friction plate; and lubricating grease is injected to the surface of the main driving sealing ring through a sealing grease injection pipe.
Further, the device also comprises a sealed working temperature sensor; the sealing working temperature sensor is embedded at the back of the sealing friction plate and penetrates through the cold and hot water circulation cavity.
Further, the distance between a temperature probe at the front end of the sealing working temperature sensor and the surface of the sealing friction plate is controlled within 5 mm.
Furthermore, the device also comprises a signal processing and displaying unit; and the heat signal monitored by the sealing working temperature sensor is acquired into a signal processing and displaying unit to carry out analog/digital conversion and numerical value display.
Furthermore, the system also comprises an overrun judging and temperature controlling execution unit, a cold water supply system and a hot water supply system; the monitoring signal of the sealing working temperature sensor is transmitted to the overrun judging and temperature controlling execution unit, and the overrun judging and temperature controlling execution unit is compared with a self-defined temperature limit value, so that the main driving seal is automatically judged to be in high temperature overrun or low temperature overrun, and a corresponding cold water supply system or hot water supply system is automatically started.
The utility model has the advantages and beneficial effects that:
1. the utility model has two temperature control functions of sealing heating and sealing cooling, thereby ensuring that the main driving seal is always in a good working temperature range, generally between +20 ℃ and +60 ℃;
2. the working condition of the shield machine main driving sealing system can be ensured not to be influenced by the external environment temperature, and the engineering environment adaptability of the shield machine is improved to a certain extent;
3. external support is provided for ensuring that the main driving seal maintains good physical and mechanical properties, so that the sealing effect and the working reliability of the main driving seal are improved;
4. the aging speed of the main driving sealing material is favorably slowed down, so that the service life of the main driving sealing ring is prolonged;
5. the design concept of simply selecting a sealing material with higher high temperature resistance/lower temperature resistance in the prior art can be widened; by selecting the sealing ring made of conventional/normal-temperature materials, the manufacturing cost of the shield machine main driving sealing structure can be effectively reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic cross-sectional view of the present invention.
The device comprises a main driving sealing ring 1, a sealing friction plate 2, a cold and hot water circulating cavity 3, a separation baffle 4, sealing lubricating grease 5, a sealing working temperature sensor 6, a signal processing and displaying unit 7, an overrun judging and temperature controlling execution unit 8, a cold water supply system 9, a hot water supply system 10 and a water inlet and outlet 11.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example (b):
the shield machine main drive sealing system with the active temperature control function comprises a main drive sealing ring 1, a sealing friction plate 2, a cold and hot water circulation cavity 3, a separation baffle 4, a sealing lubricating grease injection pipe 5, a sealing working temperature sensor 6, a signal processing and display unit 7, an overrun determination and temperature control execution unit 8, a cold water supply system 9, a hot water supply system 10 and a water inlet and outlet 11;
the friction surface of the main driving seal ring 1 is attached to the annular sealing friction plate 2, the sealing friction plate 2 is made of a wear-resistant steel plate with the thickness of 10-15mm, and the steel plate is covered on the surface of the cold and hot water circulation cavity 3 in a watertight welding mode at two ends after being rolled to form a sliding track of the main driving seal ring 1;
the cold and hot water circulation cavity 3 is an annular cavity, and at least two water inlets and outlets 11 (an inlet and an outlet) are arranged on the wall of the cavity; a separation baffle 4 is arranged between the two water inlets and the two water outlets 11 in the cold and hot water circulation cavity 3 to ensure that the cold/hot water can realize the whole-circle circulation in the cold and hot water circulation cavity 3, thereby realizing the high-efficiency temperature control;
the sealing grease injection pipe 5 penetrates through the cold and hot water circulation cavity 3 and the sealing friction plate 2 and leads to the contact surface of the main driving sealing ring 1 and the sealing friction plate 2; lubricating grease is injected to the surface of the main driving sealing ring 1 through a sealing grease injection pipe 5 and is used for realizing lubrication and friction reduction during friction of the main driving sealing ring; the sealing grease injection pipe 5 penetrates through the position of the cold and hot water circulation cavity 3 and needs to be subjected to watertight welding;
the sealing working temperature sensor 6 is embedded in the back of the sealing friction plate 2, and in order to improve the temperature monitoring precision, the distance between a temperature probe at the front end of the sealing working temperature sensor 6 and the surface of the sealing friction plate 2 needs to be controlled within 5 mm;
the sealed working temperature sensor 6 needs to pass through the cold and hot water circulation cavity 3, and therefore, the temperature insulation protection of the sealed working temperature sensor 6 needs to be carried out at the passing position. The welding positions of the sealing working temperature sensor 6 are required to be subjected to watertight welding; the heat signal monitored by the sealing working temperature sensor 6 is collected into the signal processing and displaying unit 7 for analog/digital conversion and numerical value display, so that the visual observation of an operator is facilitated;
the monitoring signal of the sealing working temperature sensor 6 is further transmitted to an overrun judging and temperature controlling execution unit 8, and the main driving seal is automatically judged to be in high temperature overrun or low temperature overrun by comparing with the temperature limit value defined by the overrun judging and temperature controlling execution unit 8, so that a corresponding cold water supply system 9 or hot water supply system 10 is automatically started to realize the temperature controlling function of the main driving seal;
in order to prevent the abnormal leakage of the cold/hot water flow, all welding seams related to the cold/hot water circulation cavity 3 need to be subjected to watertight welding when the structure of the cold/hot water circulation cavity 3 is manufactured; after welding, 100% PT (dye penetrant inspection) or 100% MT (magnetic powder inspection) must be carried out on all watertight welds, so that all watertight welds are ensured to have no defects such as cracks.
In order to ensure the pressure bearing capacity and the working reliability of the cold and hot water circulation cavity 3, a pressure-resistant test needs to be performed on the cold and hot water circulation cavity 3 after the structure of the cold and hot water circulation cavity 3 is manufactured, and the pressure of the pressure-resistant test is greater than the cold/hot water supply pressure during actual work.
The working principle is as follows: when the shield machine is in a high and cold external environment, the standing working temperature of the main driving sealing ring 1 is also lower. When the standing detection temperature of the main driving seal ring 1 is lower than the ideal working temperature (such as 20 ℃) of the sealing material, an operator must start the shield machine main driving seal temperature control system first, and water bath heating is carried out on the main driving seal ring 1 and the sealing friction plate 2 thereof in a hot water circulation mode. When the temperature value detected by the sealing working temperature sensor 6 reaches the ideal working temperature range (such as +20 ℃ to +60 ℃) of the sealing material, the shield machine cutter head is started to rotate.
When the shield tunneling machine is in a high-heat external environment, the standing working temperature of the main driving sealing ring 1 is higher. When the standing detection temperature of the main driving seal ring 1 is higher than the ideal working temperature (such as 60 ℃) of the sealing material, an operator must start the shield machine main driving seal temperature control system firstly, and water bath cooling is carried out on the main driving seal ring 1 and the sealing friction plate 2 thereof in a cold water circulation mode. When the temperature value detected by the sealing working temperature sensor 6 reaches the ideal working temperature range (such as +20 ℃ to +60 ℃) of the sealing material, the shield machine cutter head is started to rotate.
In the normal operation process of the cutter head of the shield tunneling machine, friction and heat generation are generated between a main driving sealing ring 1 and a sealing friction plate 2 (generally made of steel wear-resistant materials). The sealing working temperature sensor 6 monitors the heat in real time, when the heat value detected by the sealing working temperature sensor 6 is higher than the ideal working temperature (such as 60 ℃) of the sealing material, the temperature overrun signal is fed back to the shield machine main driving sealing temperature control system in real time, and the temperature control system automatically starts the cold water supply system 9 to perform circulating flow cooling on the main driving sealing ring 1 and the sealing friction plate 2 thereof.
The temperature of the water supplied by the cold water supply system 9 can be adjusted between 5 ℃ and 20 ℃. When the heat generation efficiency of the friction of the main driving seal ring 1 is too fast and the temperature rise is too large, the main driving seal ring 1 and the sealing friction plate 2 thereof need to be efficiently and rapidly cooled, and at this time, the water supply temperature of the cold water supply system 9 needs to be set to a lower value.
If the temperature value detected by the sealing working temperature sensor 6 is always in a low-temperature overrun state (such as tunneling under frozen soil geology) in the normal operation process of the cutter head of the shield tunneling machine, the temperature overrun signal is fed back to the shield tunneling machine main driving sealing temperature control system in real time, and the temperature control system automatically and continuously starts the hot water supply system 10 to perform circulating flow heating on the main driving sealing ring 1 and the sealing friction plate 2 thereof.
The temperature of the water supplied to the hot water supply system 10 may be adjusted between 50 c and 80 c. When the operating temperature of the main drive seal ring 1 is too low and the temperature drop range is too large, the water supply temperature of the hot water supply system 10 can be set to a high value.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a shield constructs owner and drives sealing system who possesses initiative accuse temperature function which characterized in that: the hot and cold water circulating cavity comprises a main driving sealing ring, a sealing friction plate and a cold and hot water circulating cavity body; the friction surface of the main driving sealing ring is attached to the annular sealing friction plate; the sealing friction plate covers the surface of the cold and hot water circulation cavity; the cold and hot water circulation cavity is an annular cavity, and at least two water inlets and outlets are arranged on the wall of the cavity; and a separation baffle is arranged between the water inlet and the water outlet inside the cold and hot water circulation cavity.
2. The shield machine main driving sealing system with the active temperature control function according to claim 1, characterized in that: the sealing friction plate is made of a wear-resistant steel plate, and the wear-resistant steel plate is covered on the surface of the cold and hot water circulation cavity in a watertight welding mode at two ends after being rolled.
3. The shield machine main driving sealing system with the active temperature control function according to claim 2, characterized in that: the thickness range of the wear-resistant steel plate is 10-15 mm.
4. The shield machine main driving sealing system with the active temperature control function according to claim 1, characterized in that: also comprises a sealing grease injection pipe; the sealing grease injection pipe penetrates through the cold and hot water circulation cavity and the sealing friction plate and leads to the contact surface of the main driving sealing ring and the sealing friction plate; and lubricating grease is injected to the surface of the main driving sealing ring through a sealing grease injection pipe.
5. The shield machine main driving sealing system with the active temperature control function according to claim 1, characterized in that: the device also comprises a sealed working temperature sensor; the sealing working temperature sensor is embedded at the back of the sealing friction plate and penetrates through the cold and hot water circulation cavity.
6. The shield machine main driving sealing system with the active temperature control function according to claim 5, characterized in that: the distance between the temperature probe at the front end of the sealing working temperature sensor and the surface of the sealing friction plate is controlled within 5 mm.
7. The shield machine main driving sealing system with the active temperature control function according to claim 5, characterized in that: the device also comprises a signal processing and displaying unit; and the heat signal monitored by the sealing working temperature sensor is acquired into a signal processing and displaying unit to carry out analog/digital conversion and numerical value display.
8. The shield machine main driving sealing system with the active temperature control function according to claim 7, characterized in that: the system also comprises an overrun judging and temperature controlling execution unit, a cold water supply system and a hot water supply system; the monitoring signal of the sealing working temperature sensor is transmitted to the overrun judging and temperature controlling execution unit, and the overrun judging and temperature controlling execution unit is compared with a self-defined temperature limit value, so that the main driving seal is automatically judged to be in high temperature overrun or low temperature overrun, and a corresponding cold water supply system or hot water supply system is automatically started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220619301.2U CN216951654U (en) | 2022-03-22 | 2022-03-22 | Shield constructs owner and drives sealing system that possesses initiative accuse temperature function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220619301.2U CN216951654U (en) | 2022-03-22 | 2022-03-22 | Shield constructs owner and drives sealing system that possesses initiative accuse temperature function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216951654U true CN216951654U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220619301.2U Active CN216951654U (en) | 2022-03-22 | 2022-03-22 | Shield constructs owner and drives sealing system that possesses initiative accuse temperature function |
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| Country | Link |
|---|---|
| CN (1) | CN216951654U (en) |
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- 2022-03-22 CN CN202220619301.2U patent/CN216951654U/en active Active
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