Hydraulic control mechanism for temporary support of steam generator

Abstract

The utility model provides a hydraulic control mechanism for temporary supporting of a steam generator. The hydraulic control mechanism comprises an oil tank assembly, a circumferential oil cylinder assembly, a radial oil cylinder assembly, a lower supporting oil cylinder assembly and a vertical oil cylinder assembly. Oil inlets of the circumferential oil cylinder assembly, the radial oil cylinder assembly and the lower supporting oil cylinder assembly are connected into the low-pressure adjusting loop in parallel, an oil inlet of the vertical oil cylinder assembly is connected with the high-pressure adjusting loop, and the low-pressure adjusting loop and the high-pressure adjusting loop are connected into the pump assembly in parallel. The pressure loss and the overflow valve loss are small, the energy consumption is low, the heat productivity is low, the flow of the high-pressure pipeline and the low-pressure pipeline is controlled through the pressure reducing valve, redundant flow directly returns to the oil tank instead of returning to the oil tank through the overflow valve, and the pressure loss and the overflow loss are reduced, so that the system energy consumption is reduced, and the system heat productivity is reduced.

Description

Technical Field

[0001] The utility model relates to a hydraulic control mechanism for the temporary support of a steam generator. Background Art

[0002] Energy is the foundation of social and economic development, and nuclear power plays an important role in the energy structure. At present, the vast majority of nuclear power plants built and operated in China are pressurized water reactor nuclear power plants. As one of the key components of a nuclear power unit, the steam generator has a net weight of about 624t and has technical characteristics such as heavy tonnage, large volume, long hoisting time, and high installation accuracy requirements. Before the steam generator is in place, it needs temporary support to keep it in a stable "standing" position, which is mainly divided into upper temporary support and lower temporary support. The accurate alignment of the steam generator and the main pipeline is completed through temporary support, which is convenient for the installation of the permanent support of the steam generator. The hydraulic system provides power for the temporary support of the steam generator. The upper temporary support is installed on the top of the CA01 wall, and the three-dimensional movement, verticality, rotation, and locking functions of the steam generator are realized through 8 horizontal hydraulic cylinders and 4 vertical hydraulic cylinders on the upper part; the lower temporary support is installed at the trunnion part in the middle of the steam generator body, and the verticality adjustment and locking functions of the steam generator body are realized through 4 hydraulic cylinders.

[0003] The steam generator needs to move in multiple degrees of freedom, and the maximum horizontal movement speed of the hydraulic cylinder needs to reach 75mm / min, the rated vertical speed needs to reach 2.5mm / min, the circumferential rotation angle is ±1°, the verticality range is 0 - 0.5°, and the angle adjustment accuracy is 0.01°. However, the existing hydraulic support system for the steam generator does not meet the above requirements. For example, a support device, system, and installation method for the installation of a nuclear steam generator disclosed in CN116928497A can drive the base to move horizontally or longitudinally in a plane perpendicular to the vertical direction through the transverse drive part and the longitudinal drive part that are 90 degrees to each other in the first drive part, which can meet the need to move the nuclear steam generator in a plane perpendicular to the vertical direction; however, it cannot support the rotation of the steam generator and cannot meet the use requirements. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a hydraulic control mechanism for the temporary support of a steam generator.

[0005] The present invention is achieved through the following technical solutions.

[0006] A hydraulic control mechanism for the temporary support of a steam generator provided by the present invention includes an oil tank assembly, a circumferential oil cylinder assembly, a radial oil cylinder assembly, a lower support oil cylinder assembly, and a vertical oil cylinder assembly; the oil inlets of the circumferential oil cylinder assembly, the radial oil cylinder assembly, and the lower support oil cylinder assembly are connected in parallel to a low-pressure regulating circuit, the oil inlet of the vertical oil cylinder assembly is connected to a high-pressure regulating circuit, both the low-pressure regulating circuit and the high-pressure regulating circuit are connected in parallel to a pump assembly, the oil return ports of the circumferential oil cylinder assembly, the radial oil cylinder assembly, the lower support oil cylinder assembly, and the vertical oil cylinder assembly are all connected in parallel to an oil return pipeline, the pump assembly is connected to the oil outlet of the oil tank assembly, a first pressure reducing valve and a second pressure reducing valve are respectively installed on the low-pressure regulating circuit and the high-pressure regulating circuit, a check valve, a single-cylinder pipeline filtering combination, and a ball valve are sequentially arranged between the pump assembly and the low-pressure regulating circuit and the high-pressure regulating circuit; the circumferential oil cylinder assembly, the radial oil cylinder assembly, the lower support oil cylinder assembly, and the vertical oil cylinder assembly are respectively composed of four groups of circumferential oil cylinder control circuits, four groups of radial oil cylinder control circuits, four groups of lower support oil cylinder control circuits, and four groups of vertical oil cylinder control circuits connected in parallel.

[0007] An oil suction filter is installed in the oil tank assembly and connected to the oil outlet of the oil tank assembly, and an oil return filter is also provided on the oil tank assembly and connected to the oil return pipeline.

[0008] A butterfly valve and a first flexible joint are also sequentially connected between the oil suction filter and the pump assembly.

[0009] A liquid level transmitter, a temperature transmitter, and an air filter are also installed on the oil tank assembly, a cooler is also provided on the oil tank assembly, and both ends of the cooler are respectively connected to the oil tank assembly through pipelines, and a first stop valve and a second stop valve are respectively installed at both ends of the cooler.

[0010] The pump assembly includes a piston pump, and the piston pump is connected to the motor through a bell-type housing coupling.

[0011] The outlet of the check valve is also connected to a needle valve, and a pressure gauge and a pressure transmitter are installed on the needle valve.

[0012] The outlet of the check valve is also connected to the oil return pipeline through an electromagnetic overflow valve.

[0013] Each of the circumferential oil cylinder control circuit, the radial oil cylinder control circuit, and the lower support oil cylinder control circuit includes an M-type electromagnetic reversing valve. The oil inlet of the M-type electromagnetic reversing valve is connected to the low-pressure regulating circuit through a branch pipe. The two working ports of the M-type electromagnetic reversing valve are respectively and sequentially connected to the oil inlet and the oil outlet of a circumferential oil cylinder through a stacked hydraulic check valve, a stacked double one-way throttle valve, and a pressure measuring joint. The oil return port of the M-type electromagnetic reversing valve is connected to the oil return pipeline.

[0014] The vertical oil cylinder control circuit includes an O-type electromagnetic directional control valve; the oil inlet of the O-type electromagnetic directional control valve is connected to the high-pressure regulation circuit, and the working port is sequentially connected to the vertical oil cylinder through a stacked hydraulic check valve, a stacked one-way throttle valve, a pressure gauge adapter, and an explosion-proof valve.

[0015] A connecting pipe is provided between the stacked one-way throttle valves on any two sets of circumferential oil cylinder control circuits, any two sets of radial oil cylinder control circuits, any two sets of lower support oil cylinder control circuits, and any two sets of vertical oil cylinder control circuits among the circumferential oil cylinder assembly, the radial oil cylinder assembly, the lower support oil cylinder assembly, and the vertical oil cylinder assembly.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The system has a simple structure, high reliability, stable operation, and is easy to maintain, meeting the requirements of the maximum horizontal movement speed of the hydraulic cylinder of 75 mm / min, the rated vertical speed of 2.5 mm / min, the circumferential rotation angle of ±1°, the verticality range of 0 - 0.5°, and the angle adjustment accuracy of 0.01°;

[0018] Considering the problem of mismatched flow rates in the vertical oil cylinder hydraulic pipeline after a 0.5° off-load, it has hydraulic and mechanical locking functions, is connected with an explosion-proof valve to prevent accidental lowering due to overloading of the load, and ensures the synchronous and stable operation of the vertical oil cylinder and the coordinated linkage of multiple hydraulic cylinders;

[0019] The pressure loss and the loss of the relief valve are small, the energy consumption is low, and the heat generation is less. The flow rates of the high-pressure and low-pressure pipelines are controlled by a pressure reducing valve, and the excess flow directly returns to the oil tank instead of returning to the oil tank through the relief valve, reducing the pressure loss and the relief loss, thereby reducing the system energy consumption and the heat generation of the system. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the system principle of the present utility model.

[0021] In the figure: 1 - fuel tank assembly, 101 - oil suction filter, 102 - butterfly valve, 103 - first flexible joint, 104 - liquid level transmitter, 105 - temperature transmitter, 106 - air filter, 107 - oil return filter, 108 - liquid level and liquid temperature gauge, 109 - drain ball valve, 110 - first stop valve, 111 - second stop valve, 112 - cooler, 2 - pump assembly, 201 - piston pump, 202 - bell housing coupling, 203 - motor, 3 - check valve, 4 - needle valve, 5 - pressure gauge, 6 - pressure transmitter, 7 - single - cylinder pipeline filter combination, 8 - ball valve, 9 - first pressure reducing valve, 10 - second pressure reducing valve, 11 - electromagnetic overflow valve, 12 - circumferential oil cylinder assembly, 1201 - M - type electromagnetic directional valve A, 1202 - stacked pilot - operated check valve A, 1203 - stacked double - one - way throttle valve A, 1204 - first pressure measuring joint A, 1205 - second pressure measuring joint A, 1206 - circumferential oil cylinder, 13 - radial oil cylinder assembly, 1301 - M - type electromagnetic directional valve B, 1302 - stacked pilot - operated check valve B, 1303 - stacked double - one - way throttle valve B, 1304 - first pressure measuring joint B, 1305 - second pressure measuring joint B, 1306 - radial oil cylinder, 14 - lower support oil cylinder assembly, 1401 - M - type electromagnetic directional valve C, 1402 - stacked pilot - operated check valve C, 1403 - stacked double - one - way throttle valve C, 1404 - first pressure measuring joint C, 1405 - second pressure measuring joint C, 1406 - lower support oil cylinder, 15 - vertical oil cylinder assembly, 1501 - O - type electromagnetic directional valve, 1502 - stacked pilot - operated check valve D, 1503 - one - way throttle valve D, 1504 - pressure measuring joint D, 1505 - explosion - proof valve, 1506 - vertical oil cylinder, 16 - low - pressure regulating circuit, 17 - high - pressure regulating circuit. Detailed implementation mode

[0022] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0023] As Figure 1 shown, a hydraulic control mechanism for the temporary support of a steam generator includes a fuel tank assembly 1, a pump assembly 2, a check valve 3, a needle valve 4, a pressure gauge 5, a pressure transmitter 6, a single - cylinder pipeline filter combination 7, a ball valve 8, a pressure reducing valve 19, a pressure reducing valve 210, an electromagnetic overflow valve 11, a circumferential oil cylinder and a control valve group 12, a radial oil cylinder and a control valve group 13, a lower support oil cylinder and a control valve group 14, and a vertical oil cylinder and a control valve group 15 that are connected in sequence;

[0024] The fuel tank assembly 1 includes an oil suction filter 1.1, a liquid level transmitter 1.4, a temperature transmitter 1.5, an air filter 1.6, a liquid level and temperature gauge 1.8, and an oil drain ball valve 1.9 installed on the fuel tank. It is connected to a cooler 1.12 through stop valves 1.10 and 1.11, connected to an oil return filter 1.7 through an oil return pipeline interface, and connected to an axial piston pump 2.1 through a butterfly valve 1.2 and a flexible joint 1.3 in sequence; the pump assembly 2 includes a bell-shaped cover coupling 2.2 of the axial piston pump 2.1 and a motor M 2.3; the circumferential oil cylinder and control valve group 12, the radial oil cylinder and control valve group 13, and the lower support oil cylinder and control valve group 14 are connected in sequence through a one-way valve 3, a single-barrel pipeline filter combination 7, a ball valve 8, a pressure reducing valve 19, and a low-pressure regulating pipeline; the vertical oil cylinder and control valve group 15 are connected in sequence through a one-way valve 3, a single-barrel pipeline filter combination 7, a ball valve 8, a pressure reducing valve 210, and a high-pressure regulating pipeline.

[0025] The circumferential oil cylinder and control valve group 12 is composed of 4 parallel circumferential oil cylinder control circuits, with a single-cylinder load capacity of ≥135t. It includes an M-type electromagnetic directional control valve A1201, a stacked hydraulic check valve A 1202, a stacked double one-way throttle valve A 1203, a first pressure measuring joint A1204 and a second pressure measuring joint A1205, and a circumferential oil cylinder 1206 connected in sequence, realizing the circumferential sliding and locking functions of the steam generator.

[0026] The radial oil cylinder and control valve group 13 is composed of 4 parallel radial oil cylinder control circuits, with a single-cylinder load capacity of ≥135t. It includes an M-type electromagnetic directional control valve B1301, a stacked hydraulic check valve B1302, a stacked double one-way throttle valve B1302, a first pressure measuring joint B1304 and a second pressure measuring joint B1305, and a radial oil cylinder 1306 connected in sequence, realizing the radial sliding and locking functions of the steam generator.

[0027] The lower support oil cylinder and control valve group 14 is composed of 4 parallel lower support oil cylinder control circuits, with a single-cylinder load capacity of ≥135t. It includes an M-type electromagnetic directional control valve C1401, a stacked hydraulic check valve C1402, a stacked double one-way throttle valve C1403, a first pressure measuring joint 1404 and a second pressure measuring head 1405, and a lower support oil cylinder 1406 connected in sequence, realizing the function of adjusting and locking the verticality of the steam generator body.

[0028] The vertical oil cylinder and control valve group 15 is composed of 4 parallel vertical oil cylinder control circuits, adopting a single-oil-way direct connection to the large cavity of the oil cylinder for oil supply, with a single-cylinder load capacity of ≥308t. It includes an O-type electromagnetic directional control valve 1501, a stacked hydraulic check valve D1502, a one-way throttle valve D1503, a pressure measuring joint D1504, an explosion-proof valve 1505, and a vertical oil cylinder 1506 connected in sequence, having mechanical and hydraulic locking functions, and realizing the vertical synchronous stable operation and locking functions of the steam generator body.

[0029] The circumferential oil cylinder and control valve group 12, radial oil cylinder and control valve group 13, and lower support oil cylinder and control valve group 14 are connected in parallel by a low-pressure regulating pipeline, and the vertical oil cylinder and control valve group 15 are connected in parallel by a high-pressure regulating pipeline. By controlling the valve groups respectively, functions such as three-dimensional movement, vertical sliding, rotation, and locking of the steam generator are achieved.

[0030] The hydraulic cylinders are quickly and automatically adjusted by a "chasing" adjustment method. Using the feedback signal of the displacement sensor, the current position of the hydraulic cylinders is continuously provided. Taking the telescopic amount of each hydraulic cylinder after each movement decomposition as the target, the other hydraulic cylinders approach the telescopic amount under the control of the displacement signal. Due to the coupling of each point, each position continuously approaches until all points reach the specified position simultaneously, and the adjustment process ends.

[0031] When the circumferential oil cylinder of the temporary support of the steam generator is working, the axial piston pump 201 is started. The hydraulic pump 201 pumps hydraulic oil out of the oil tank. The hydraulic oil passes through the suction filter 101, butterfly valve 102, flexible joint 103, axial piston pump 201, check valve 3, single-tube pipeline filter combination 7, ball valve 8, first pressure reducing valve 9, and second pressure reducing valve 10 and enters the low-pressure regulating pipeline and high-pressure regulating pipeline. The electromagnetic overflow valve 11 regulates the working pressure of the whole system. The O-type electromagnetic reversing valve 1501 of the vertical oil cylinder control valve group is powered off and in the middle position and does not work. The first pressure reducing valve 10 regulates the pressure of the high-pressure pipeline and returns the excess oil to the oil tank. The first pressure reducing valve 9 regulates the pressure of the low-pressure pipeline and returns the excess oil to the oil tank. The hydraulic oil enters the M-type electromagnetic reversing valve A1201 of the circumferential oil cylinder control valve group, the M-type electromagnetic reversing valve B1301 of the radial oil cylinder control valve group, and the M-type electromagnetic reversing valve C1401 of the lower support oil cylinder control valve group. At this time, the M-type electromagnetic reversing valve B1301 of the radial oil cylinder control valve group and the M-type electromagnetic reversing valve C1401 of the lower support oil cylinder control valve group are powered off and in the middle position and do not work. The left position of the M-type electromagnetic reversing valve A1201 of the circumferential oil cylinder control valve group is powered on and opened. The stacked pilot-operated check valve A1202 is opened, and the stacked double one-way throttle valve A1203 is opened. The hydraulic oil enters the large chamber of the circumferential oil cylinder 1206, and the piston rod of the circumferential oil cylinder 1206 extends to adjust the circumferential displacement and attitude of the steam generator. Similarly, when the right position of the M-type electromagnetic reversing valve A12.1 of the circumferential oil cylinder control valve group is powered on and opened, the stacked pilot-operated check valve A1202 is opened, and the stacked double one-way throttle valve A1203 is opened. The hydraulic oil enters the small chamber of the circumferential oil cylinder 1206, and the piston rod of the circumferential oil cylinder 1206 retracts to adjust the circumferential displacement and attitude of the steam generator. The M-type electromagnetic reversing valve A1201 of the circumferential oil cylinder control valve group is powered off and in the middle position, and the hydraulic pipeline of the circumferential oil cylinder 1206 is pressurized to achieve hydraulic locking.

[0032] When the radial oil cylinder of the temporary support of the steam generator is working, the M-type electromagnetic directional control valve A1201 of the circumferential oil cylinder control valve group and the M-type electromagnetic directional control valve C1401 of the lower support oil cylinder control valve group are de-energized and in the middle position without working. The left position of the M-type electromagnetic directional control valve B1301 of the radial oil cylinder control valve group is energized and opened, the pilot-operated check valve B1302 is opened, the double one-way throttle valve B1303 is opened, and the hydraulic oil enters the large chamber of the radial oil cylinder B1306. The piston rod of the radial oil cylinder B1306 extends to adjust the radial displacement and attitude of the steam generator. Similarly, when the right position of the M-type electromagnetic directional control valve B1301 of the radial oil cylinder control valve group is energized and opened, the pilot-operated check valve B1302 is opened, the double one-way throttle valve B1303 is opened, and the hydraulic oil enters the small chamber of the radial oil cylinder 1306. The piston rod of the radial oil cylinder 1306 retracts to adjust the radial displacement and attitude of the steam generator. When the M-type electromagnetic directional control valve B1301 of the radial oil cylinder control valve group is de-energized and in the middle position, the hydraulic pipeline of the radial oil cylinder 1306 is pressurized to achieve hydraulic locking.

[0033] When the lower support oil cylinder of the temporary support of the steam generator is working, the M-type electromagnetic directional control valve A1201 of the circumferential oil cylinder control valve group and the M-type electromagnetic directional control valve B1301 of the radial oil cylinder control valve group are de-energized and in the middle position without working. The left position of the M-type electromagnetic directional control valve 1401 of the lower support oil cylinder control valve group is energized and opened, the pilot-operated check valve C1402 is opened, the double one-way throttle valve C1403 is opened, and the hydraulic oil enters the large chamber of the lower support oil cylinder 1406. The piston rod of the lower support oil cylinder 1406 extends to adjust the support displacement and attitude of the steam generator. Similarly, when the right position of the M-type electromagnetic directional control valve C1401 of the lower support oil cylinder control valve group is energized and opened, the pilot-operated check valve C1402 is opened, the double one-way throttle valve C1403 is opened, and the hydraulic oil enters the small chamber of the lower support oil cylinder 1406. The piston rod of the lower support oil cylinder 1406 retracts to adjust the support displacement and attitude of the steam generator. When the M-type electromagnetic directional control valve C1401 of the lower support oil cylinder control valve group is de-energized and in the middle position, the hydraulic pipeline of the radial oil cylinder 1406 is pressurized to achieve hydraulic locking.

[0034] When the circumferential oil cylinder 1206, radial oil cylinder 1306 and lower support oil cylinder 1406 of the temporary support of the steam generator need to be adjusted and linked together, the M-type electromagnetic directional control valve A1201 of the circumferential oil cylinder control valve group, the M-type electromagnetic directional control valve B1301 of the radial oil cylinder control valve group and the M-type electromagnetic directional control valve C1401 of the lower support oil cylinder control valve group can be controlled according to the specific process to realize the three-dimensional movement, perpendicularity, rotation and locking functions of the steam generator.

[0035] When the three-dimensional attitude of the steam generator is adjusted in place, the vertical oil cylinder 1505 realizes the functions of vertical sliding and locking. When the vertical oil cylinder of the temporary support of the steam generator is working, the M-type electromagnetic directional control valve A1201 of the circumferential oil cylinder control valve group, the M-type electromagnetic directional control valve B1301 of the radial oil cylinder control valve group, and the M-type electromagnetic directional control valve C1401 of the lower support oil cylinder control valve group are de-energized and in the middle position without working. The left position of the O-type electromagnetic directional control valve 1501 of the vertical support oil cylinder control valve group is energized and opened. The pilot-operated check valve D1502, the one-way throttle valve D1503, and the explosion-proof valve 1505 are opened. The hydraulic oil enters the large chamber of the vertical oil cylinder 1506, and the piston rod of the vertical oil cylinder 1505 slowly extends to adjust the support displacement and attitude of the steam generator; similarly, the right position of the M-type electromagnetic directional control valve D1501 of the vertical oil cylinder control valve group is energized and opened. The pilot-operated check valve D1502 is opened, the one-way throttle valve D1503 is opened, and the hydraulic oil enters the small chamber of the vertical oil cylinder 1506. The piston rod of the vertical oil cylinder 1506 retracts to adjust the vertical displacement and attitude of the steam generator; the M-type electromagnetic directional control valve D1501 of the vertical oil cylinder control valve group is de-energized and in the middle position, and the hydraulic pipeline of the vertical oil cylinder 1506 is pressurized to achieve hydraulic locking.

Claims

1. A hydraulic control mechanism for the temporary support of a steam generator, comprising an oil tank assembly (1), a circumferential oil cylinder assembly (12), a radial oil cylinder assembly (13), a lower support oil cylinder assembly (14), and a vertical oil cylinder assembly (15), characterized in that: The oil inlets of the circumferential oil cylinder assembly (12), radial oil cylinder assembly (13), and lower support oil cylinder assembly (14) are connected in parallel to the low-pressure regulating circuit (16). The oil inlet of the vertical oil cylinder assembly (15) is connected to the high-pressure regulating circuit (17). Both the low-pressure regulating circuit (16) and the high-pressure regulating circuit (17) are connected in parallel to the pump assembly (2). The oil return ports of the circumferential oil cylinder assembly (12), radial oil cylinder assembly (13), lower support oil cylinder assembly (14), and vertical oil cylinder assembly (15) are all connected in parallel to the oil return pipeline. The pump assembly (2) is connected to the oil outlet of the fuel tank assembly (1). A first pressure reducing valve (9) and a second pressure reducing valve (10) are respectively installed on the low-pressure regulating circuit (16) and the high-pressure regulating circuit (17). A check valve (3), a single-cylinder pipeline filter combination (7), and a ball valve (8) are successively arranged between the pump assembly (2) and the low-pressure regulating circuit (16) and the high-pressure regulating circuit (17). The circumferential oil cylinder assembly (12), radial oil cylinder assembly (13), lower support oil cylinder assembly (14), and vertical oil cylinder assembly (15) are respectively composed of four groups of circumferential oil cylinder control circuits, four groups of radial oil cylinder control circuits, four groups of lower support oil cylinder control circuits, and four groups of vertical oil cylinder control circuits connected in parallel.

2. The hydraulic control mechanism for the temporary support of the steam generator according to claim 1, wherein: An oil suction filter (101) is installed in the fuel tank assembly (1) and connected to the oil outlet of the fuel tank assembly (1). A return oil filter (107) is also provided on the fuel tank assembly (1) and connected to the oil return pipeline.

3. The hydraulic control mechanism for temporary support of a steam generator according to claim 2, characterized in that: A butterfly valve (102) and a first flexible joint (103) are successively connected between the oil suction filter (101) and the pump assembly (2).

4. The hydraulic control mechanism for temporary support of a steam generator according to claim 2, characterized in that: A liquid level transmitter (104), a temperature transmitter (105), and an air filter (106) are also installed on the fuel tank assembly (1). A cooler (112) is also provided on the fuel tank assembly (1). The two ends of the cooler (112) are respectively connected to the fuel tank assembly (1) through pipelines, and a first stop valve (110) and a second stop valve (111) are respectively installed at the two ends of the cooler (112).

5. The hydraulic control mechanism for the temporary support of the steam generator according to claim 1, characterized in that: The pump assembly (2) includes a piston pump (201), and the piston pump (201) is connected to the motor (203) through a bell-type housing coupling (202).

6. The hydraulic control mechanism for the temporary support of the steam generator according to claim 1, characterized in that: The outlet of the check valve (3) is also connected to a needle valve (4), and a pressure gauge (5) and a pressure transmitter (6) are installed on the needle valve (4).

7. The hydraulic control mechanism for temporary support of a steam generator according to claim 6, characterized in that: The outlet of the check valve (3) is also connected to the oil return pipeline through an electromagnetic overflow valve (11).

8. The hydraulic control mechanism for the temporary support of the steam generator according to claim 1, wherein: The circumferential oil cylinder control circuit, radial oil cylinder control circuit, and lower support oil cylinder control circuit all include an M-type electromagnetic directional valve. The oil inlet of the M-type electromagnetic directional valve is connected to the low-pressure regulating circuit (16) through a branch pipe. The two working ports of the M-type electromagnetic directional valve are respectively connected to the oil inlet and outlet of a circumferential oil cylinder through a stacked hydraulic check valve, a stacked double one-way throttle valve, and a pressure measuring joint in sequence. The oil return port of the M-type electromagnetic directional valve is connected to the oil return pipeline.

9. The hydraulic control mechanism for the temporary support of a steam generator as described in claim 1, characterized in that: The vertical oil cylinder control circuit includes an O-type electromagnetic directional control valve; the oil inlet of the O-type electromagnetic directional control valve is connected to the high-pressure regulating circuit (17), and the working port is sequentially connected to the vertical oil cylinder through a stacked hydraulic check valve, a stacked one-way throttle valve, a pressure measuring joint, and an explosion-proof valve.

10. The hydraulic control mechanism for the temporary support of the steam generator according to claim 1, wherein: A connecting pipeline is provided between the stacked one-way throttle valves on any two sets of circumferential oil cylinder control circuits, any two sets of radial oil cylinder control circuits, any two sets of lower support oil cylinder control circuits, and any two sets of vertical oil cylinder control circuits in the circumferential oil cylinder assembly (12), the radial oil cylinder assembly (13), the lower support oil cylinder assembly (14), and the vertical oil cylinder assembly (15).

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