Heading machine and cooling system thereof

Abstract

The utility model belongs to the technical field of full-section tunneling equipment, and particularly provides a tunneling machine and a cooling system thereof. The heading machine cooling system comprises an inner circulating water system, a refrigerating unit and an outer circulating water system, the refrigerating unit comprises a water-cooled condenser, the outer circulating water system comprises an outer cooling device and an outer circulating loop, and the condenser is connected to the outer circulating loop to cool the condenser. The heading machine comprises the heading machine cooling system. Compared with the prior art, the outer cooling device is located outside the tunnel and is not affected by the temperature in the tunnel, the cooling and heat dissipation effect of water cooling is better than that of air cooling, and therefore the cooling effect of the condenser is improved, it is guaranteed that the refrigerating unit can work normally, and the cooling device is suitable for stratums with the high environment temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field of full-section tunneling equipment, in particular to a tunneling machine and a cooling system thereof. Background Art

[0002] The tunnel boring machine is equipped with a cooling system for cooling down and dissipating heat from various working equipment (main drive, hydraulic pump station, frequency conversion cabinet, air compressor, etc.). Currently, the commonly used cooling systems mainly include an internal circulating water system, a heat exchanger, and an external circulating water system. The internal circulating water system is used to cool the working equipment of the tunnel boring machine, and the external circulating water system is used to cool the internal circulating water. Specifically, the internal circulating water includes a cold water tank, an internal cooling water circulation loop, a water pump, a valve, etc. The external circulating water system includes a cooling tower, an external cooling water circulation loop, a water pump, a valve, etc., which are arranged outside the tunnel. The internal circulating water circulation loop and the external circulating water circulation loop are connected to the heat exchanger, and the internal and external cooling waters undergo heat exchange in the heat exchanger to achieve cooling of the internal circulating water.

[0003] When constructing in strata with rich geothermal resources or high ambient temperature, the heating of various equipment is unstable, and there is a common problem of equipment overheating. Traditional cooling systems have difficulty cooling the temperature of the equipment to the ideal working temperature. In related technologies, technical solutions have begun to appear to add refrigeration units to the circulation loop of the internal circulation water system. For example, the patent application of the applicant with application publication number CN109944598A provides an internal circulation water cooling system equipped with a refrigeration unit, which includes a refrigeration unit connected in series to the water circulation loop. The refrigeration unit includes a compressor, a condenser and an evaporator, etc., which can realize forced cooling of the internal circulation cooling water in the tunnel.

[0004] When working, the condenser in the refrigeration unit will also release heat, so the heat released by the condenser also needs to be cooled. In the above cooling system, the condenser of the refrigeration unit is connected to the return air duct of the tunnel, and the return air in the return air duct is used to cool the condenser, which is actually an air-cooled condenser. However, when constructing in a stratum with a relatively high ambient temperature, the return air in the return air duct is actually at a relatively high temperature. At this time, it is difficult to cool the refrigeration unit to the ideal temperature using the return air, and there is a problem that the refrigeration unit is prone to overheating. Utility Model Content

[0005] The purpose of the utility model is to provide a roadheader cooling system to solve the technical problem of insufficient cooling effect of a refrigeration unit for cooling internal circulating water in the prior art. The purpose of the utility model is also to provide a roadheader to solve the same technical problem.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the cooling system of the tunnel boring machine provided by the utility model is:

[0007] A tunnel boring machine cooling system includes an internal circulation water system, the internal circulation water system includes an internal circulation loop, and the internal circulation water system is equipped with a refrigeration unit for cooling water in the internal circulation loop, the refrigeration unit includes a condenser, and the condenser is a water-cooled condenser. The tunnel boring machine cooling system also includes an external circulation water system, the external circulation water system includes an external circulation loop and an external cooling device connected to the external circulation loop and used to be arranged outside the tunnel, and the condenser is connected to the external circulation loop.

[0008] As a further improvement, the internal circulation water system includes a heat exchanger, the refrigeration unit is provided with an independent cooling circuit, and both the internal circulation circuit and the cooling circuit are connected to the heat exchanger to complete the heat exchange in the heat exchanger.

[0009] As a further improvement, the loop in the external circulation loop connected to the condenser is defined as the main line, and the external circulation loop also includes a branch line connected to the heat exchanger.

[0010] As a further improvement, the refrigeration unit is a variable frequency unit including a variable frequency controller, and the tunnel boring machine cooling system also includes a temperature detection device for detecting the water temperature of the inner circulation loop, and the temperature detection device is communicatively connected to the variable frequency controller.

[0011] As a further improvement, valves whose opening and closing are controlled by valve controllers are provided on both the main pipeline and the branch pipeline. The valve controller is communicatively connected with the frequency conversion controller to control the opening and closing of the valves according to the working frequency of the refrigeration unit.

[0012] As a further improvement, the refrigeration unit is directly connected to the return water pipeline of the internal circulation loop.

[0013] As a further improvement, the internal circulation water system also includes an internal water tank, and the water outlet of the refrigeration unit is connected to the internal water tank.

[0014] As a further improvement, the return water pipeline connected to the refrigeration unit in the internal circulation loop is defined as the main return water pipeline, and the return water pipeline in the internal circulation loop also includes a branch return water pipeline directly connected to the internal water tank.

[0015] As a further improvement, the refrigeration unit is a variable frequency unit including a variable frequency controller, and the tunnel boring machine cooling system also includes a temperature detection device for detecting the water temperature of the inner circulation loop, and the temperature detection device is communicatively connected to the variable frequency controller.

[0016] As a further improvement, the external cooling device includes a cooling tower and a circulating water pool.

[0017] The beneficial effect is that the utility model is an improved invention. When working, the refrigeration unit can cool the cooling water in the internal circulation loop of the cooling working equipment. At the same time, the external circulation loop in the configured external circulation water system is connected to the water-cooled condenser, so that the condenser can be cooled to ensure the normal operation of the refrigeration unit. Compared with the prior art, the external cooling device in the utility model is located outside the tunnel and is not affected by the temperature in the tunnel, and the cooling and heat dissipation effect of water cooling is also better than air cooling, so the cooling effect of the condenser is also improved, ensuring that the refrigeration unit can work normally, and is suitable for use in strata with high ambient temperature.

[0018] In order to achieve the above-mentioned purpose, the technical solution of the tunnel boring machine provided by the utility model is:

[0019] A tunnel boring machine includes a cooling system, the cooling system includes an internal circulation water system, the internal circulation water system includes an internal circulation loop, and the internal circulation water system is equipped with a refrigeration unit for cooling water in the internal circulation loop, the refrigeration unit includes a condenser, and the condenser is a water-cooled condenser. The tunnel boring machine cooling system also includes an external circulation water system, the external circulation water system includes an external circulation loop and an external cooling device connected to the external circulation loop and used to be arranged outside the tunnel, and the condenser is connected to the external circulation loop.

[0020] As a further improvement, the internal circulation water system includes a heat exchanger, the refrigeration unit is provided with an independent cooling circuit, and both the internal circulation circuit and the cooling circuit are connected to the heat exchanger to complete the heat exchange in the heat exchanger.

[0021] As a further improvement, the loop in the external circulation loop connected to the condenser is defined as the main line, and the external circulation loop also includes a branch line connected to the heat exchanger.

[0022] As a further improvement, the refrigeration unit is a variable frequency unit including a variable frequency controller, and the tunnel boring machine cooling system also includes a temperature detection device for detecting the water temperature of the inner circulation loop, and the temperature detection device is communicatively connected to the variable frequency controller.

[0023] As a further improvement, valves whose opening and closing are controlled by valve controllers are provided on both the main pipeline and the branch pipeline. The valve controller is communicatively connected with the frequency conversion controller to control the opening and closing of the valves according to the working frequency of the refrigeration unit.

[0024] As a further improvement, the refrigeration unit is directly connected to the return water pipeline of the internal circulation loop.

[0025] As a further improvement, the internal circulation water system also includes an internal water tank, and the water outlet of the refrigeration unit is connected to the internal water tank.

[0026] As a further improvement, the return water pipeline connected to the refrigeration unit in the internal circulation loop is defined as the main return water pipeline, and the return water pipeline in the internal circulation loop also includes a branch return water pipeline directly connected to the internal water tank.

[0027] As a further improvement, the refrigeration unit is a variable frequency unit including a variable frequency controller, and the tunnel boring machine cooling system also includes a temperature detection device for detecting the water temperature of the inner circulation loop, and the temperature detection device is communicatively connected to the variable frequency controller.

[0028] As a further improvement, the external cooling device includes a cooling tower and a circulating water pool.

[0029] The beneficial effect is that the utility model is an improved invention. When working, the refrigeration unit can cool the cooling water in the internal circulation loop of the cooling working equipment. At the same time, the external circulation loop in the configured external circulation water system is connected to the water-cooled condenser, so that the condenser can be cooled to ensure the normal operation of the refrigeration unit. Compared with the prior art, the external cooling device in the utility model is located outside the tunnel and is not affected by the temperature in the tunnel, and the cooling and heat dissipation effect of water cooling is also better than air cooling, so the cooling effect of the condenser is also improved, ensuring that the refrigeration unit can work normally, and is suitable for use in strata with high ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of Example 1 of the cooling system for a roadheader in the utility model;

[0031] Figure 2 It is a structural schematic diagram of Example 2 of the cooling system of the tunnel boring machine in the utility model.

[0032] Description of reference numerals:

[0033] 1. Cooling tower; 2. Circulating water pool; 3. Water pump; 4. External water return pipeline; 5. External water inlet pipeline; 6. Cooling return pipeline; 7. Condenser; 8. Main return pipeline; 9. Main inlet pipeline; 10. Valve; 11. Branch return pipeline; 12. Evaporator; 13. Branch inlet pipeline; 14. Heat exchanger; 15. Internal water tank; 16. Temperature detection device; 17. Internal water return pipeline; 18. Internal water inlet pipeline; 19. First internal water branch pipeline; 20. Second internal water branch pipeline; 21. Third internal water branch pipeline; 22. Fourth internal water branch pipeline; 23. Fifth internal water branch pipeline; 24. Internal branch return pipeline; 25. Internal main return pipeline; 26. Cooling inlet pipeline. DETAILED DESCRIPTION

[0034] In order to improve the cooling effect of the refrigeration unit, the basic technical concept of the utility model is to provide a water-cooled refrigeration unit, specifically a tunnel boring machine cooling system including an internal circulation water system, a refrigeration unit and an external circulation water system, wherein the internal circulation water system is used to cool the various working equipment of the tunnel boring machine, the refrigeration unit is used to cool the circulating water in the internal circulation water system, and the refrigeration unit is a water-cooled unit using a water-cooling method, and the external circulation water system is used to cool the refrigeration unit. Compared with the air-cooled refrigeration unit solution in the prior art, the use of a water-cooled unit obviously has a better cooling effect, can ensure that the heat of the refrigeration unit is fully cooled, and is suitable for complex environments with high temperatures.

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Specific embodiment 1 of the cooling system for a tunnel boring machine provided by the utility model:

[0037] The cooling system of the tunnel boring machine provided in this embodiment is as follows: Figure 1 As shown, it includes an internal circulation water system, which includes an internal circulation loop. The internal circulation loop is used to cool the various working equipment of the tunnel boring machine, specifically including an internal water inlet pipeline 18 and an internal water return pipeline 17. Several branch pipelines are arranged on the internal water inlet pipeline 18 and the internal water return pipeline 17, such as a first internal water branch pipeline 19 for cooling the air compressor, a second internal water branch pipeline 20 for cooling the frequency converter cabinet, a third internal water branch pipeline 21 for cooling the hydraulic pump station, a fourth internal water branch pipeline 22 for cooling the screw machine drive, a fifth internal water branch pipeline 23 for cooling the main drive, etc. A water pump 3 is provided on the internal water inlet management to pump cooling water to each internal water branch pipeline.

[0038] The internal circulation water system is also equipped with a refrigeration unit, which refers to a unit including a compressor, an evaporator 12, a condenser 7 and other devices, which is used to cool the water in the internal circulation loop or the cooling water. The condenser 7 in this embodiment is a water-cooled condenser 7, that is, a cooling device that uses water as a cooling medium to condense a high-temperature and high-pressure gaseous refrigerant. Specifically, a water-cooled condenser 7 in the prior art can be selected according to the cooling capacity requirements.

[0039] The tunnel boring machine cooling system in this embodiment also includes an external circulating water system, which includes an external cooling device and an external circulation loop. The external cooling device is used to be arranged outside the tunnel, for example, at the starting position. The external cooling device is connected to the condenser 7 of the refrigeration unit through the external circulation loop. Specifically, the external circulation loop includes an external water inlet pipeline 5 and an external water return pipeline 4. A water pump 3 is arranged on the external water inlet pipeline 5. The external cooling water enters the cooling water flow channel of the condenser 7 through the main inlet pipeline 9, and flows back from the main return pipeline 8 to the external water return pipeline 4. In this way, the cooling water in the external circulation loop can play a role in cooling the refrigeration unit, ensuring that the refrigeration unit can work normally in a high temperature environment.

[0040] Specifically, as a low-cost and good cooling effect implementation, the external cooling device includes a cooling tower 1 and a circulating water pool 2, so that the conventional external circulating water system complete set of equipment in the prior art can be directly used. Of course, in other implementations, the external cooling device can also use a complete set of refrigeration units.

[0041] like Figure 1 As shown, the internal circulation water system also includes a heat exchanger 14, and the refrigeration unit is equipped with an independent cooling circuit. The internal circulation circuit is connected to the heat exchanger 14, and the cooling circuit is connected to the heat exchanger 14. The heat exchanger 14 can be a heat exchanger 14 in the prior art, such as a plate heat exchanger 14. The cooling circuit includes a cooling inlet pipeline 26 and a cooling return pipeline 6. Specifically, the cooling water in the internal water return pipeline 17 completes heat exchange (cooling) with the water in the cooling circuit through the heat exchanger 14 and then enters each internal water branch pipeline again from the internal water inlet pipeline 18. This design of separating the cooling water in the refrigeration unit and the cooling water in the internal circulation circuit can ensure the purity of the internal circulation water.

[0042] On the basis of being equipped with a heat exchanger 14, the external circulation loop also includes a branch loop with the heat exchanger 14, so that when the temperature is relatively low in the formation, the external circulation water in the external circulation loop can exchange heat with the cooling water in the internal circulation loop, expanding the cooling mode of the cooling system. Specifically, the external water inlet pipeline 5 is connected in parallel with the main inlet pipeline 9 and the branch inlet pipeline 13, the external water return pipeline 4 is connected in parallel with the main return pipeline 8 and the branch return pipeline 11, and the branch inlet pipeline 13 and the branch return pipeline 11 are connected to the heat exchanger 14. The main inlet pipeline 9, the branch inlet pipeline 13, the main return pipeline 8, and the branch return pipeline 11 are all provided with valves 10, which can control the opening and closing of the valves 10 to switch different modes. For example, when the valves 10 on the main return pipeline 8 and the main inlet pipeline 9 are closed, and the valves 10 on the branch return pipeline 11 and the branch inlet pipeline 13 are opened, the external circulation water in the external circulation loop can directly exchange heat with the cooling water in the internal circulation loop in the heat exchanger 14.

[0043] In order to improve the energy efficiency ratio of the refrigeration unit, the refrigeration unit in this embodiment preferably adopts a variable frequency unit, and the variable frequency unit includes a variable frequency controller. At the same time, a temperature detection device 16 is also configured on the inner circulation loop, and the temperature detection device 16 can be used to detect the water temperature of the inner circulation loop. The temperature detection device 16 is connected to the variable frequency controller in communication, that is, the water temperature data detected by the temperature detection device 16 can be transmitted to the variable frequency controller, and the variable frequency controller can adjust the frequency of the refrigeration unit according to the water temperature data. The temperature detection device 16 referred to here refers to a temperature detection device 16 including a temperature sensor and a communication module, wherein the communication module can be a wired module or a wireless module.

[0044] The internal circulation water system in this embodiment includes an internal water tank 15, which is connected in series to the internal circulation loop, so that sufficient flowing cooling water can be ensured in the internal circulation loop. At this time, the temperature detection device 16 can be set on the internal water tank 15, which is convenient for setting. Of course, in other embodiments, whether or not the internal water tank 15 is configured, the temperature detection device 16 can be set on the internal water return pipeline 17.

[0045] Furthermore, the valves 10 configured for the main inlet pipeline 9, the branch inlet pipeline 13, the main return pipeline 8, and the branch return pipeline 11 are all valves 10 whose opening and closing are controlled by a valve controller, such as an electric ball valve. The valve controller is connected to the frequency conversion controller in communication. When the refrigeration unit is lower than the lowest operating frequency (for example, it has passed through a high-temperature formation), the valve controller can automatically control the closing of the valves 10 on the main return pipeline 8 and the main inlet pipeline 9, and the opening of the valves 10 on the branch inlet pipeline 13 and the branch return pipeline 11, and automatically switch to the working mode in which the external cooling water system directly cools the internal circulating water. Of course, in other implementations, each valve can also be a manually controlled valve. During operation, the valve is manually controlled to open and close by the staff to switch the working mode.

[0046] Specific embodiment 2 of the cooling system for a roadheader provided by the utility model:

[0047] In this embodiment, the connection methods of each pipeline are as follows Figure 2As shown, compared with Example 1, the main difference is that this embodiment does not have a heat exchanger 14, and the refrigeration unit is directly connected to the internal circulation loop. At this time, the cooling water in the internal circulation loop can be directly cooled by the refrigeration unit, eliminating the heat loss in the heat exchanger 14, and the thermal efficiency is higher. Specifically, the internal circulation water system is also equipped with an internal water tank 15, and the water outlet of the refrigeration unit is connected to the internal water tank 15 through the cooling inlet pipeline 26. The water cooled by the refrigeration unit can enter the internal water tank 15 from the cooling inlet pipeline 26. In this way, the internal water tank 15 can be used to store more cooling water to ensure that there is sufficient circulating water in each internal water branch pipeline. Of course, in other implementations, the internal water tank 15 may not be configured, and a refrigeration unit with a larger power may be configured. The internal water inlet pipeline 18 and the internal water return pipeline 17 are directly connected to the refrigeration unit to achieve the effect of immediate cooling and immediate use.

[0048] Furthermore, the inner water return pipeline 17 is divided into two parallel branches, one of which is connected to the refrigeration unit and is defined as the main pipeline, i.e., the inner main return pipeline 25, and the other is connected to the inner water tank 15 and is defined as the branch pipeline, i.e., the inner branch return pipeline 24. This ensures that water can be continuously returned to the inner water tank 15. The water cooled by the refrigeration unit enters the inner water tank 15 and mixes with the water in the inner water tank 15, which can also play a cooling role.

[0049] Of course, in this embodiment, the refrigeration unit can still use a variable frequency unit, and be equipped with a temperature detection device 16 for detecting the water temperature of the inner circulation loop. The temperature detection device 16 is communicated with the frequency conversion controller of the variable frequency unit to adjust the operating frequency of the refrigeration unit according to the water temperature in the inner circulation loop to improve the energy efficiency ratio.

[0050] Specific embodiment of the tunnel boring machine in the utility model:

[0051] The tunnel boring machine includes a cooling system having the same structure as the cooling system described in the above-mentioned embodiment of the tunnel boring machine cooling system, which will not be described in detail here.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cooling system for a roadheader, comprising an internal circulation water system, the internal circulation water system comprising an internal circulation loop, and the internal circulation water system is equipped with a refrigeration unit for cooling water in the internal circulation loop, the refrigeration unit comprising a condenser, characterized in that: The condenser is a water-cooled condenser. The tunnel boring machine cooling system also includes an external circulation water system, which includes an external circulation loop and an external cooling device connected to the external circulation loop and used to be arranged outside the tunnel. The condenser is connected to the external circulation loop.

2. The cooling system for a roadheader according to claim 1, characterized in that: The internal circulation water system includes a heat exchanger. The refrigeration unit is equipped with an independent cooling circuit. Both the internal circulation circuit and the cooling circuit are connected to the heat exchanger to complete heat exchange in the heat exchanger.

3. The cooling system of the tunnel boring machine according to claim 2, characterized in that: The loop connected to the condenser in the external circulation loop is defined as the main line, and the external circulation loop also includes a branch line connected to the heat exchanger.

4. The cooling system for a roadheader according to claim 3, characterized in that: The refrigeration unit is a variable frequency unit including a variable frequency controller. The tunnel boring machine cooling system also includes a temperature detection device for detecting the water temperature of the inner circulation loop. The temperature detection device is communicatively connected with the variable frequency controller.

5. The cooling system for a roadheader according to claim 4, characterized in that: Valves controlled by valve controllers are provided on the main pipeline and the branch pipeline. The valve controller is connected to the frequency conversion controller for controlling the opening and closing of the valves according to the working frequency of the refrigeration unit.

6. The cooling system for a roadheader according to claim 1, characterized in that: The refrigeration unit is directly connected to the return water pipe of the internal circulation loop.

7. The cooling system for a roadheader according to claim 6, characterized in that: The internal circulation water system also includes an internal water tank, and the water outlet of the refrigeration unit is connected to the internal water tank.

8. The cooling system for a roadheader according to claim 7, characterized in that: The return water pipeline connected to the refrigeration unit in the internal circulation loop is defined as the main return water pipeline. The return water pipeline in the internal circulation loop also includes a branch return water pipeline directly connected to the internal water tank.

9. The roadheader cooling system according to any one of claims 6 to 8, characterized in that: The refrigeration unit is a variable frequency unit including a variable frequency controller. The tunnel boring machine cooling system also includes a temperature detection device for detecting the water temperature of the inner circulation loop. The temperature detection device is communicatively connected with the variable frequency controller.

10. The cooling system for a roadheader according to any one of claims 1 to 8, characterized in that: External cooling devices include cooling towers and circulating water pools.

11. A roadheader, comprising a cooling system, characterized in that: The cooling system is the roadheader cooling system according to any one of claims 1 to 10.

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