Filter device, system and control method for quickly cutting off oil in oil suction pipeline

Abstract

The present invention relates to a filter device, system and control method for quickly cutting off the oil in an oil suction pipeline. The filter device comprises an oil suction filter body (2), one end of which is provided with an oil suction port (3), and the other end of which is provided with a single-acting oil cylinder with a spring and an end cover assembly (1), and the outer side of the oil suction port (3) is provided with an oil suction port cover plate (4) and an oil suction port cover plate spring (5) in sequence. The filter system comprises a pressure oil source (33), an accumulator assembly (35), an emergency operation valve group (40) and a plurality of filter devices for quickly cutting off the oil in an oil suction pipeline, the pressure oil source (33) is connected to the accumulator assembly (35), the accumulator assembly (35) is connected to the emergency operation valve group (40), and the emergency operation valve group (40) is respectively connected to the plurality of filter devices for quickly cutting off the oil in an oil suction pipeline. The present invention is easy to operate and can achieve the technical effect of quickly cutting off the oil in the oil suction filter pipeline of a hydraulic oil tank.

Description

Technical Field

[0001] The invention belongs to the field of mechanical hydraulic systems, and in particular relates to a filter device, a system and a control method for quickly cutting off oil in an oil suction pipeline. Background Art

[0002] my country's railway network is widely distributed. In the construction of new lines, overhaul of old lines and maintenance of operating lines, the application of large-scale road maintenance machinery is indispensable. The hydraulic system is an important component of most large-scale road maintenance machinery, and the capacity of the hydraulic oil tank in the hydraulic system is almost greater than 1000L, and some even exceed 2000L. The diameter of the multiple oil suction pipelines at the bottom of the hydraulic oil tank is as large as 102mm. Therefore, when an emergency fire occurs in a large-scale road maintenance machinery, if the oil suction pipeline is burned and the leaked hydraulic oil will greatly fuel the fire, causing a larger fire accident, thereby endangering the safety of the workshop or line where the vehicle is located.

[0003] At present, the oil suction filter used in the hydraulic oil tank of large-scale railway maintenance machinery is to remove the end cover assembly at the end to release the axial force of the oil suction port cover plate, and the oil suction port is closed under the action of the oil suction port cover plate spring, thereby cutting off the connection channel between the hydraulic oil tank oil and the oil suction pipeline. Although this scheme can realize the function of cutting off the hydraulic oil of the oil suction pipeline, since the end cover assembly is connected to the oil suction filter body through a thread, it is necessary to manually remove the end cover assemblies of several oil suction filters installed in the hydraulic oil tank of large-scale maintenance machinery one by one to complete the cutting off of the oil of all oil suction pipelines. The operation is cumbersome and time-consuming and laborious. Especially in the event of an emergency fire, if this scheme of removing the end cover assembly is used to cut off the oil in the oil suction pipeline, it will definitely not meet the technical requirements of emergency disposal.

[0004] Therefore, it is necessary to design a filter device that can quickly cut off the oil in the oil suction pipeline, so as to quickly isolate the oil in the hydraulic oil tank from the oil suction pipeline in an emergency fire and prevent the occurrence of larger fire accidents.

[0005] The Chinese utility model patent with the patent number ZL201120467284.7 discloses a hydraulic oil tank suction filter. According to the embodiment of the utility model, the hydraulic oil tank suction filter comprises: a flange, the flange having an oil hole; an oil suction pipe, one end of which is connected to one side of the flange and the oil suction pipe and the flange are integrally formed by injection molding; an oil suction filter, which is installed on the other side of the flange and is connected to the oil suction pipe through the oil hole of the flange. The hydraulic oil tank suction filter according to the embodiment of the utility model has the advantages of simple manufacturing process, low cost, high internal cleanliness, etc. by setting the flange and the oil suction pipe as an integral part. However, the utility model is only applicable to automobiles, and is not applicable to the hydraulic system of large-scale railway maintenance machinery, so it still needs to be improved. Summary of the invention

[0006] In order to solve the above technical defects of the existing hydraulic oil tank suction filter and achieve the technical effect of quickly cutting off the oil in the hydraulic oil tank suction pipeline of large-scale railway maintenance machinery, so as to effectively prevent greater safety problems caused by hydraulic oil leakage and combustion in emergency fire, thereby ensuring the safety of the workshop or line where the vehicle is located. The present invention provides a filter device, system and control method for quickly cutting off the oil in the oil suction pipeline.

[0007] The preferred technical solution of the filter device for quickly cutting off the oil in the oil suction pipeline of the present invention is as follows:

[0008] A filter device for quickly cutting off oil in an oil suction pipeline comprises an oil suction filter body, one end of the oil suction filter body is provided with an oil suction port, an oil suction port cover plate is installed on the outer side of the oil suction port, an oil suction port cover plate spring is installed on the outer side of the oil suction port cover plate, and the other end of the oil suction filter body is provided with a single-acting cylinder with a spring and an end cover assembly.

[0009] Preferably, the single-acting cylinder with spring and end cover assembly comprises a single-acting cylinder with spring and an end cover body, the single-acting cylinder with spring and the end cover body are fixedly and sealedly connected, a through hole is opened in the center of the end cover body, the single-acting cylinder with spring comprises a shell, a piston rod and a spring top plate assembly, the front end of the piston rod passes through the through hole and is connected to the spring top plate assembly through a connecting sleeve.

[0010] In any of the above schemes, it is preferred that the front end face of the shell is a mounting surface, a sealing groove is opened on the mounting surface and a plurality of threaded mounting holes are evenly distributed along the circumferential direction, a sealing ring is installed in the sealing groove, a sinker is opened at one end of the end cover body, a plurality of mounting holes are evenly distributed on the bottom surface of the sinker along the circumferential direction, the plurality of threaded mounting holes correspond one to one with the plurality of mounting holes and are fixed and sealed by bolts, the bottom surface of the sinker and its inner circular surface are respectively in contact with the mounting surface and its outer circular surface to form a joint surface.

[0011] In any of the above schemes, it is preferred that an oil inlet, a breathing port and an oil drain port are respectively opened on the shell, and a spring is sleeved on the rear end of the piston rod.

[0012] The preferred technical solution of the filter system for quickly cutting off the oil in the oil suction pipeline of the present invention is as follows:

[0013] A filter system for quickly cutting off the oil in an oil suction pipeline comprises a pressure oil source, an accumulator assembly and an emergency operation valve group, wherein the pressure oil source is connected to the accumulator assembly via a first pipeline, and the accumulator assembly is connected to the emergency operation valve group via a third pipeline, and comprises a plurality of filter devices for quickly cutting off the oil in the oil suction pipeline, and the emergency operation valve group is respectively connected to the plurality of filter devices for quickly cutting off the oil in the oil suction pipeline.

[0014] Preferably, the accumulator assembly comprises an accumulator and a safety valve, the accumulator is connected to the safety valve, and the safety valve is respectively provided with a first pressure oil port, a stop valve, a second pressure oil port and an oil return port.

[0015] In any of the above schemes, it is preferred that a first hydraulic oil tank is included, and the first hydraulic oil tank is connected to the oil return port through a second pipeline.

[0016] In any of the above schemes, it is preferred that the emergency operation valve group includes a transition block and a three-way rotary valve, the transition block is provided with a plurality of joints, the transition block is connected to the three-way rotary valve, and the three-way rotary valve is equipped with a pressure gauge.

[0017] In any of the above schemes, it is preferred that a second hydraulic oil tank is included, and the second hydraulic oil tank is connected to the three-way rotary valve through a fourth pipeline.

[0018] In any of the above schemes, it is preferred that the several filter devices for quickly cutting off the oil in the oil suction line are set to seven, namely, a first filter device for quickly cutting off the oil in the oil suction line, a second filter device for quickly cutting off the oil in the oil suction line, a third filter device for quickly cutting off the oil in the oil suction line, a fourth filter device for quickly cutting off the oil in the oil suction line, a fifth filter device for quickly cutting off the oil in the oil suction line, a sixth filter device for quickly cutting off the oil in the oil suction line and a seventh filter device for quickly cutting off the oil in the oil suction line, and the seven filter devices for quickly cutting off the oil in the oil suction line are connected to the emergency operation valve group through a fifth pipeline, a sixth pipeline, a seventh pipeline, an eighth pipeline, a ninth pipeline, a tenth pipeline and an eleventh pipeline respectively.

[0019] The preferred technical solution of the control method of the filter system for quickly cutting off the oil in the oil suction pipeline of the present invention is as follows:

[0020] A control method for a filter system for quickly cutting off oil in an oil suction line, the control method is implemented by any of the above-mentioned filter devices and systems for quickly cutting off oil in an oil suction line, including a pressure oil storage component, namely the accumulator assembly, an emergency operation component, namely the emergency operation valve group, and an actuator, namely the filter device for quickly cutting off oil in an oil suction line, comprising the following steps: during pressurization, the stop valve in the accumulator assembly is opened, at which time the three-way rotary valve in the emergency operation valve group and the third pipeline are in a cut-off state, the pressure oil source enters the accumulator through the first pipeline, and the stop valve is closed when the oil pressure reaches the set pressure of the safety valve, at which time the pressure oil can be stored in the accumulator assembly; when an emergency fire occurs, the three-way rotary valve handle in the emergency operation valve group is turned until the third pipeline and the three-way rotary valve are in a connected position, at which time the several filter devices for quickly cutting off oil in the oil suction line start to operate, thereby realizing the rapid cutting off of oil in the oil suction line.

[0021] Preferably, in an emergency fire situation, when the three-way rotary valve handle in the emergency operating valve group is turned, the filter devices for quickly cutting off the oil in the oil suction pipeline are switched from a normal state to an emergency state, and the pressure oil stored in the accumulator assembly respectively enters the oil inlet on the spring-acting single-acting cylinder in the filter devices for quickly cutting off the oil in the oil suction pipeline through the several pipelines, enters the internal cavity thereof and overcomes the force of the spring on the piston rod, at which time the piston rod retracts, and the spring-acting single-acting cylinder and the end cover assembly are switched from a normal state to an emergency state, at which time the axial force of the oil suction port cover plate is released, and the oil suction port is closed under the action of the oil suction port cover plate spring, thereby realizing the rapid cutting off of the oil in the oil suction pipeline.

[0022] Compared with the prior art, the beneficial effect of the present invention is that by improving the end cover assembly of the existing oil suction filter into a filter device with a spring single-acting oil cylinder and an end cover assembly for quickly cutting off the oil in the oil suction pipeline, the oil in the oil suction pipeline can be quickly cut off without removing the spring single-acting oil cylinder and the end cover assembly, that is, the oil suction port is quickly closed by releasing the axial force of the oil suction port cover plate through the action of the piston rod in the spring single-acting oil cylinder, thereby achieving the technical effect of quickly cutting off the oil in the oil suction filter pipeline of the hydraulic oil tank. The present invention can quickly cut off the oil in the oil suction pipeline system of the hydraulic oil tank of a large road maintenance machinery, and the oil suction ports of several filter devices in the filter system for quickly cutting off the oil in the oil suction pipeline can be closed at the same time, which is convenient to operate and cuts off quickly, thereby ensuring the safety of the workshop or line where the vehicle is located when an emergency fire occurs in a large road maintenance machinery. The present invention can also quickly cut off the oil in the oil suction pipeline corresponding to the hydraulic pump that needs to be removed, repaired or replaced without pumping out the oil in the hydraulic oil tank, thereby greatly reducing the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A front view of a preferred embodiment of a filter device for quickly cutting off oil in an oil suction line according to the present invention.

[0024] Figure 2 It is an isometric view of a preferred embodiment of a filter device for quickly cutting off oil in an oil suction line according to the present invention.

[0025] Figure 3 It is an isometric view of a preferred embodiment of a single-acting cylinder with a spring in a filter device for quickly cutting off the oil in the oil suction pipeline according to the present invention.

[0026] Figure 4 The present invention is a cross-sectional view of a preferred embodiment of a single-acting cylinder with a spring in a filter device for quickly cutting off the oil in an oil suction pipeline according to the present invention.

[0027] Figure 5 The invention discloses an isometric view of a single-acting oil cylinder with a spring and an end cover assembly in a normal state in a filter device for quickly cutting off oil in an oil suction pipeline according to the present invention.

[0028] Figure 6 The present invention is a partial cross-sectional view of a single-acting oil cylinder with a spring and an end cover assembly in a normal state in a filter device for quickly cutting off oil in an oil suction pipeline according to the present invention.

[0029] Figure 7 The invention discloses an isometric view of a single-acting oil cylinder with a spring and an end cover assembly in an emergency state in a filter device for quickly cutting off oil in an oil suction pipeline according to the present invention.

[0030] Figure 8The present invention is a partial cross-sectional view of a single-acting oil cylinder with a spring and an end cover assembly in an emergency state in a filter device for quickly cutting off oil in an oil suction pipeline according to the present invention.

[0031] Fig. 9 The present invention is a front view of a preferred embodiment of an accumulator assembly in a filter system for quickly shutting off oil in an oil suction line according to the present invention.

[0032] Fig.10 It is a front view of a preferred embodiment of the emergency operation valve group in the filter system for quickly cutting off the oil in the oil suction pipeline according to the present invention.

[0033] Fig.11 The figure is a schematic diagram of the working principle of a hydraulic system according to a preferred embodiment of the filter system for quickly cutting off the oil in the oil suction pipeline of the present invention.

[0034] Fig.12 It is the front view of the existing large-scale road maintenance machinery oil suction filter.

[0035] Fig.13 This is an isometric view of an existing large-scale road maintenance machinery oil suction filter.

[0036] Fig.14 It is a front view of an existing oil suction filter end cover assembly.

[0037] Fig.15 It is a cross-sectional view of an existing oil suction filter end cover assembly.

[0038] Description of reference numerals:

[0039] 1 Single-acting cylinder with spring and end cover assembly; 2 Oil suction filter body; 3 Oil suction port; 4 Oil suction port cover; 5 Oil suction port cover spring; 6 Threaded mounting hole; 7 Housing; 8 Oil inlet; 9 Breathing port; 10 Spring; 11 Oil drain port; 12 Mounting surface; 13 Piston rod; 14 Seal groove; 15 Single-acting cylinder with spring; 16 End cover body; 17 Through hole; 18 Mounting hole; 19 Bolt; 20 Joint surface; 21 Connecting sleeve; 22 Spring top plate assembly; 23 Accumulator; 24 Safety valve; 25 First pressure oil port; 26 Stop valve; 27 Second pressure oil port; 28 Oil return port; 29 Transition block; 30 Joint; 31 Three-way rotary valve; 32 Pressure gauge; 33 Pressure oil source; 34 First pipeline; 35 Accumulator assembly; 36 Second pipeline; 37.1 First hydraulic oil tank; 37. 2 second hydraulic oil tank; 38 third pipeline; 39 fourth pipeline; 40 emergency operation valve group; 41 fifth pipeline; 42 sixth pipeline; 43 seventh pipeline; 44 eighth pipeline; 45 ninth pipeline; 46 tenth pipeline; 47 eleventh pipeline; 48.1 first quick-cut filter device for oil in the oil suction pipeline; 48.2 second quick-cut filter device for oil in the oil suction pipeline; 48.3 third quick-cut filter device for oil in the oil suction pipeline; 48.4 fourth quick-cut filter device for oil in the oil suction pipeline; 48.5 fifth quick-cut filter device for oil in the oil suction pipeline; 48.6 sixth quick-cut filter device for oil in the oil suction pipeline; 48.7 seventh quick-cut filter device for oil in the oil suction pipeline; 49 existing end cover assembly; 50 existing end cover body. DETAILED DESCRIPTION

[0040] Combine the following Figure 1-13 The technical solution of the filter device, system and control method for quickly cutting off the oil in the oil suction pipeline is described in detail:

[0041] The preferred technical solution of the filter device for quickly cutting off the oil in the oil suction pipeline of the present invention comprises an oil suction filter body 2, an oil suction port 3 is opened at one end of the oil suction filter body 2, an oil suction port cover plate 4 is installed on the outer side of the oil suction port 3, an oil suction port cover plate spring 5 is installed on the outer side of the oil suction port cover plate 4, and a single-acting cylinder with a spring and an end cover assembly 1 are installed on the other end of the oil suction filter body 2.

[0042] The single-acting cylinder with spring and end cover assembly 1 comprises a single-acting cylinder with spring 15 and an end cover body 16. The single-acting cylinder with spring 15 and the end cover body 16 are fixedly and sealedly connected. A through hole 17 is opened in the center of the end cover body 16. The single-acting cylinder with spring 15 comprises a housing 7, a piston rod 13 and a spring top plate assembly 22. The front end of the piston rod 13 passes through the through hole 17 and is connected to the spring top plate assembly 22 through a connecting sleeve 21.

[0043] The front end face of the shell 7 is a mounting surface 12, a sealing groove 14 is opened on the mounting surface 12 and a plurality of threaded mounting holes 6 are evenly distributed along the circumferential direction, a sealing ring is installed in the sealing groove 14, a sinking platform is opened at one end of the end cover body 16, a plurality of mounting holes 18 are evenly distributed on the bottom surface of the sinking platform along the circumferential direction, a plurality of threaded mounting holes 6 correspond to a plurality of mounting holes 18 one by one and are fixedly sealed and connected by bolts 19, the bottom surface of the sinking platform and its inner circular surface are respectively in contact with the mounting surface 12 and its outer circular surface to form a joint surface 20.

[0044] The housing 7 is provided with an oil inlet 8, a breathing port 9 and an oil drain port 11, respectively. A spring 10 is sleeved on the rear end of the piston rod 13.

[0045] The present invention improves the end cover assembly 49 of the existing oil suction filter into a filter device with a spring single-acting cylinder and an end cover assembly 1 for quickly cutting off the oil in the oil suction pipeline. This can achieve the goal of quickly cutting off the oil in the oil suction pipeline without removing the spring single-acting cylinder and the end cover assembly 1. That is, the piston rod 13 in the spring single-acting cylinder 15 is actuated to release the axial force of the oil suction port cover plate 4 to quickly close the oil suction port 3, thereby achieving the technical effect of quickly cutting off the oil in the hydraulic oil tank oil suction filter pipeline.

[0046] The preferred technical solution of the filter system for quickly cutting off the oil in the oil suction line of the present invention includes a pressure oil source 33, an accumulator assembly 35 and an emergency operation valve group 40. The pressure oil source 33 and the accumulator assembly 35 are connected by a first pipeline 34, and the accumulator assembly 35 and the emergency operation valve group 40 are connected by a third pipeline 38. It includes several filter devices for quickly cutting off the oil in the oil suction line, and the emergency operation valve group 40 is respectively connected to the several filter devices for quickly cutting off the oil in the oil suction line.

[0047] The accumulator assembly 35 includes an accumulator 23 and a safety valve 24 . The accumulator 23 is connected to the safety valve 24 . The safety valve 24 is provided with a first pressure oil port 25 , a stop valve 26 , a second pressure oil port 27 and an oil return port 28 .

[0048] It comprises a first hydraulic oil tank 37 . 1 , and the first hydraulic oil tank 37 . 1 is connected to the oil return port 28 via a second pipeline 36 .

[0049] The emergency operation valve group 40 includes a transition block 29 and a three-way rotary valve 31 . The transition block 29 is provided with a plurality of joints 30 . The transition block 29 is connected to the three-way rotary valve 31 . The three-way rotary valve 31 is provided with a pressure gauge 32 .

[0050] It includes a second hydraulic oil tank 37 . 2 , and the second hydraulic oil tank 37 . 2 is connected to the three-way rotary valve 31 via a fourth pipeline 39 .

[0051] The plurality of filter devices for quickly cutting off the oil in the oil suction line are preferably set to seven, namely, a first filter device 48.1 for quickly cutting off the oil in the oil suction line, a second filter device 48.2 for quickly cutting off the oil in the oil suction line, a third filter device 48.3 for quickly cutting off the oil in the oil suction line, a fourth filter device 48.4 for quickly cutting off the oil in the oil suction line, a fifth filter device 48.5 for quickly cutting off the oil in the oil suction line, a sixth filter device 48.6 for quickly cutting off the oil in the oil suction line and a seventh filter device 48.7 for quickly cutting off the oil in the oil suction line. The seven filter devices for quickly cutting off the oil in the oil suction line are connected to the emergency operation valve group 40 through the fifth pipeline 41, the sixth pipeline 42, the seventh pipeline 43, the eighth pipeline 44, the ninth pipeline 45, the tenth pipeline 46 and the eleventh pipeline 47 respectively.

[0052] The preferred technical solution of the control method of the filter system for quickly cutting off the oil in the oil suction line of the present invention is as follows: the control method is implemented by the filter device and system for quickly cutting off the oil in the oil suction line of any one of the above embodiments, including a pressure oil storage component, i.e., an accumulator assembly 35, an emergency operation component, i.e., an emergency operation valve group 40, and an actuator, i.e., the filter device for quickly cutting off the oil in the oil suction line, comprising the following steps: when charging, opening the stop valve 26 in the accumulator assembly 35, at this time, the three-way rotary valve 31 in the emergency operation valve group 40 The third pipeline 38 is in a cut-off state, and the pressure oil source 33 enters the accumulator 23 through the first pipeline 34. When the oil pressure reaches the set pressure of the safety valve 24, the stop valve 26 is closed. At this time, the pressure oil can be stored in the accumulator assembly 35; when an emergency fire occurs, the handle of the three-way rotary valve 31 in the emergency operation valve group 40 is turned until the third pipeline 38 and the three-way rotary valve 31 are in a connected position. At this time, the filter devices for quickly cutting off the oil in the oil suction pipeline start to operate, thereby realizing the rapid cutting off of the oil in the oil suction pipeline.

[0053] In an emergency fire, when the handle of the three-way rotary valve 31 in the emergency operating valve group 40 is turned, the filter devices for quickly cutting off the oil in the oil suction pipeline are switched from a normal state to an emergency state, and the pressure oil stored in the accumulator assembly 35 respectively enters the filter devices for quickly cutting off the oil in the oil suction pipeline through the several pipelines, and the oil inlet 8 on the spring-acting single-acting cylinder 15 enters its internal cavity and overcomes the force of the spring 10 on the piston rod 13. At this time, the piston rod 13 retracts, and the spring-acting single-acting cylinder and the end cover assembly 1 are switched from a normal state to an emergency state. At this time, the axial force of the oil suction port cover plate 4 is released, and the oil suction port 3 is closed under the action of the oil suction port cover plate spring 5, thereby realizing the rapid cutting off of the oil in the oil suction pipeline.

[0054] The above embodiments are only preferred technical solutions, and the connection relationship between the various components or the sequence of the various steps involved are not limited to the above-described implementation schemes. The connection relationship between the various components or the sequence of the various steps in the preferred solutions can be arbitrarily arranged and combined to form a complete technical solution.

Claims

1. A filter device for quickly cutting off oil in an oil suction pipeline comprises an oil suction filter body (2), one end of the oil suction filter body (2) is provided with an oil suction port (3), an oil suction port cover plate (4) is arranged outside the oil suction port (3), and an oil suction port cover plate spring (5) is arranged outside the oil suction port cover plate (4), wherein: The other end of the oil suction filter body (2) is equipped with a spring-loaded single-acting oil cylinder and an end cover assembly (1); the spring-loaded single-acting oil cylinder and the end cover assembly (1) include a spring-loaded single-acting oil cylinder (15) and an end cover body (16); the spring-loaded single-acting oil cylinder (15) and the end cover body (16) are fixedly sealed and connected; a through hole (17) is opened at the center of the end cover body (16); the spring-loaded single-acting oil cylinder (15) includes a housing (7), a piston rod (13) and a spring top plate assembly (22); the front end of the piston rod (13) passes through the through hole (17) and is connected to the spring top plate assembly (22) through a connecting sleeve (21); in an emergency fire Under the circumstances, the filter device for quickly cutting off the oil in the oil suction pipeline switches from a normal state to an emergency state, and the pressurized oil enters the oil inlet (8) on the spring-acting single-acting oil cylinder (15) in the filter device for quickly cutting off the oil in the oil suction pipeline, enters the internal cavity thereof and overcomes the force of the spring (10) on the piston rod (13). At this time, the piston rod (13) retracts, and the spring-acting single-acting oil cylinder and the end cover assembly (1) switch from a normal state to an emergency state. At this time, the axial force of the oil suction port cover plate (4) is released, and the oil suction port (3) is closed under the action of the oil suction port cover plate spring (5), thereby realizing the rapid cutting off of the oil in the oil suction pipeline.

2. The filter device for quickly cutting off the oil in the oil suction pipeline according to claim 1, characterized in that: The front end surface of the housing (7) is a mounting surface (12), a sealing groove (14) is formed on the mounting surface (12) and a plurality of threaded mounting holes (6) are evenly distributed along the circumferential direction, a sealing ring is installed in the sealing groove (14), a sinking platform is formed at one end of the end cover body (16), a plurality of mounting holes (18) are evenly distributed on the bottom surface of the sinking platform along the circumferential direction, the plurality of threaded mounting holes (6) correspond to the plurality of mounting holes (18) one by one and are fixedly sealed and connected by bolts (19), the bottom surface of the sinking platform and its inner circumferential surface are in contact with the mounting surface (12) and its outer circumferential surface respectively to form a joint surface (20).

3. The filter device for quickly cutting off the oil in the oil suction pipeline according to claim 1, characterized in that: The housing (7) is respectively provided with an oil inlet (8), a breathing port (9) and an oil drain port (11), and a spring (10) is sleeved on the rear end of the piston rod (13).

4. A filter system for quickly cutting off the oil in an oil suction line comprises a filter device for quickly cutting off the oil in an oil suction line according to any one of claims 1 to 3, the system comprising a pressure oil source (33), an accumulator assembly (35) and an emergency operation valve group (40), the pressure oil source (33) and the accumulator assembly (35) are connected via a first pipeline (34), the accumulator assembly (35) and the emergency operation valve group (40) are connected via a third pipeline (38), and is characterized in that: It comprises a plurality of filter devices for quickly cutting off the oil in the oil suction pipeline, and the emergency operation valve group (40) is respectively connected to the plurality of filter devices for quickly cutting off the oil in the oil suction pipeline.

5. The filter system for quickly cutting off the oil in the oil suction pipeline according to claim 4, characterized in that: The accumulator assembly (35) comprises an accumulator (23) and a safety valve (24). The accumulator (23) is connected to the safety valve (24). The safety valve (24) is respectively provided with a first pressure oil port (25), a stop valve (26), a second pressure oil port (27) and an oil return port (28).

6. The filter system for quickly cutting off the oil in the oil suction pipeline according to claim 5, characterized in that: It comprises a first hydraulic oil tank (37.1), wherein the first hydraulic oil tank (37.1) is connected to the oil return port (28) via a second pipeline (36).

7. The filter system for quickly cutting off the oil in the oil suction pipeline according to claim 4, characterized in that: The emergency operation valve group (40) comprises a transition block (29) and a three-way rotary valve (31). The transition block (29) is provided with a plurality of joints (30). The transition block (29) is connected to the three-way rotary valve (31). The three-way rotary valve (31) is provided with a pressure gauge (32).

8. The filter system for quickly cutting off the oil in the oil suction pipeline according to claim 7, characterized in that: It comprises a second hydraulic oil tank (37.2), wherein the second hydraulic oil tank (37.2) is connected to the three-way rotary valve (31) via a fourth pipeline (39).

9. The filter system for quickly cutting off the oil in the oil suction pipeline according to claim 4, characterized in that: The plurality of filter devices for quickly cutting off the oil in the oil suction line are provided with seven, namely a first filter device (48.1) for quickly cutting off the oil in the oil suction line, a second filter device (48.2) for quickly cutting off the oil in the oil suction line, a third filter device (48.3) for quickly cutting off the oil in the oil suction line, a fourth filter device (48.4) for quickly cutting off the oil in the oil suction line, a fifth filter device (48.5) for quickly cutting off the oil in the oil suction line, a sixth filter device (48.6) for quickly cutting off the oil in the oil suction line, and a seventh filter device (48.7) for quickly cutting off the oil in the oil suction line. The seven filter devices for quickly cutting off the oil in the oil suction line are connected to the emergency operation valve group (40) through a fifth pipeline (41), a sixth pipeline (42), a seventh pipeline (43), an eighth pipeline (44), a ninth pipeline (45), a tenth pipeline (46), and an eleventh pipeline (47), respectively.

10. A control method for a filter system for quickly cutting off oil in an oil suction line, wherein the control method is implemented by a filter system for quickly cutting off oil in an oil suction line as claimed in any one of claims 4 to 9, comprising a pressure oil storage component, namely an accumulator assembly (35), an emergency operation component, namely an emergency operation valve group (40), and an actuator, namely the filter device for quickly cutting off oil in an oil suction line, characterized in that: The method comprises the following steps: when charging, the stop valve (26) in the accumulator assembly (35) is opened, at which time the three-way rotary valve (31) in the emergency operation valve group (40) and the third pipeline (38) are in a cut-off state, and the pressure oil source (33) enters the accumulator (23) through the first pipeline (34); when the oil pressure reaches the set pressure of the safety valve (24), the stop valve (26) is closed, and the pressure oil can be stored in the accumulator assembly (35); when an emergency fire occurs, the handle of the three-way rotary valve (31) in the emergency operation valve group (40) is turned until the third pipeline (38) and the three-way rotary valve (31) are in a connected position, and at this time, the plurality of filter devices for quickly cutting off the oil in the oil suction pipeline start to operate, thereby realizing the rapid cutting off of the oil in the oil suction pipeline.

11. The control method of the filter system for quickly cutting off the oil in the oil suction pipeline according to claim 10, characterized in that: In an emergency fire situation, when the handle of the three-way rotary valve (31) in the emergency operation valve group (40) is turned, the filter devices for quickly cutting off the oil in the oil suction pipeline are switched from a normal state to an emergency state, and the pressure oil stored in the accumulator assembly (35) respectively enters the oil inlet (8) on the spring-acting single-acting cylinder (15) in the filter devices for quickly cutting off the oil in the oil suction pipeline through the several pipelines, enters the internal cavity thereof and overcomes the force of the spring (10) on the piston rod (13). At this time, the piston rod (13) retracts, and the spring-acting single-acting cylinder and the end cover assembly (1) are switched from a normal state to an emergency state. At this time, the axial force of the oil suction port cover plate (4) is released, and the oil suction port (3) is closed under the action of the oil suction port cover plate spring (5), thereby realizing the rapid cutting off of the oil in the oil suction pipeline.

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