A shunt with in-situ self-checking function

Abstract

The present invention discloses a flow divider with an in-situ self-checking function, comprising a flow divider housing, a self-checking structure is further arranged in the flow divider housing, the self-checking structure comprises a left steering valve, a left self-checking oil circuit, a right steering valve, a right self-checking oil circuit, a confluence oil circuit, a flow measuring plate, an indicator and a third overflow valve, the flow measuring plate is installed near the inlet of the confluence oil circuit, a plate shaft is fixed at the center of the flow measuring plate, the plate shaft can be rotatably installed in the confluence oil circuit, the left end of the flow measuring plate is close to the left side of the confluence oil circuit, the right end of the flow measuring plate is close to the right side of the confluence oil circuit, the incoming oil of the left self-checking oil circuit and the right self-checking oil circuit can impact the left end and the right end of the flow measuring plate respectively, so that the flow measuring plate rotates, the indicator is arranged on the surface of the flow divider housing, an indicator needle is arranged in the indicator needle, the root of the indicator needle is fixedly connected to the plate shaft, and when the plate shaft rotates, the indicator needle can be driven to rotate. The present invention can in-situ self-check whether the oil outlets on both sides are balanced, greatly reducing the time cost and detection cost of troubleshooting the flow divider fault.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic flow dividers, and in particular relates to a flow divider with an in-situ self-checking function. Background Art

[0002] Hydraulic systems use the pressure of liquids to transfer energy and are widely used in industries, construction, aviation, etc. As one of the core components of hydraulic systems, hydraulic manifolds are responsible for distributing the high-pressure oil flow from the hydraulic pump to different actuators, such as hydraulic cylinders and hydraulic motors.

[0003] Hydraulic flow dividers can be classified according to different working principles and structural forms. Common types include: mechanical flow dividers and electronically controlled flow dividers. Mechanical flow dividers achieve oil flow distribution through mechanical structures and usually have high reliability and durability. Electronically controlled flow dividers combined with electrical control technology can achieve more precise flow control and distribution, but the application scenarios are more demanding and control circuits need to be allocated to electronically controlled flow dividers. They are suitable for hydraulic systems with a high degree of automation.

[0004] Existing hydraulic flow dividers need to undergo hydraulic flow diversion tests before leaving the factory, and only qualified products can be put on the market. However, during the use of hydraulic flow dividers, due to factors such as parts fatigue and wear, the valve core components are easily damaged, resulting in reduced flow diversion accuracy of the flow divider, unbalanced oil supply on both sides of the actuator, and production accidents.

[0005] When hydraulic imbalance is found on both sides of the actuator, it cannot be completely confirmed that it is a fault of the hydraulic diverter. Failure of the actuator itself or the connecting pipeline may also cause hydraulic imbalance on both sides of the actuator. Therefore, when testing the hydraulic diverter, the hydraulic diverter needs to be removed from the equipment and pressure tested on a special testing device, which is a cumbersome, time-consuming and labor-intensive process. Summary of the invention

[0006] In order to solve the deficiencies of the prior art, the present invention provides a flow divider with an in-situ self-checking function. The flow divider of the present invention can in-situ self-check whether the oil outlets on both sides are balanced without being removed from the equipment, which can greatly reduce the time cost and detection cost of troubleshooting the flow divider fault.

[0007] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0008] A flow divider with an in-situ self-checking function comprises a flow divider housing, the flow divider housing comprises an oil inlet and two left and right oil outlets, an oil dividing valve core, a left oil circuit and a right oil circuit are arranged in the flow divider housing, the oil inlet is connected to the inlet end of the oil dividing valve core, the oil dividing valve core divides the incoming oil into two equal parts, and respectively inputs the left oil circuit and the right oil circuit, the left oil circuit and the right oil circuit are respectively connected to an oil outlet, a self-checking structure is also arranged in the flow divider housing, the self-checking structure comprises a left steering valve, a left self-checking oil circuit, a right steering valve, a right self-checking oil circuit, a merging oil circuit, a flow measuring piece, an indicator and a third overflow valve, the left steering valve is used to change the left oil circuit to be connected to the left self-checking oil circuit inlet, the right steering valve is used to change the right oil circuit to be connected to the right self-checking oil circuit inlet The outlet of the left self-test oil circuit is connected with the left side of the inlet of the merging oil circuit, and the outlet of the right self-test oil circuit is connected with the right side of the inlet of the merging oil circuit. The flow measuring piece is installed near the inlet of the merging oil circuit. A piece shaft is fixed at the center of the flow measuring piece, and the piece shaft is rotatably installed in the merging oil circuit. The left end of the flow measuring piece is close to the left side of the merging oil circuit, and the right end of the flow measuring piece is close to the right side of the merging oil circuit. The incoming oil of the left self-test oil circuit and the right self-test oil circuit can impact the left end and the right end of the flow measuring piece respectively, so that the flow measuring piece rotates. The indicator meter is installed on the surface of the diverter housing, and an indicator needle is arranged in the indicator meter. The root of the indicator needle is fixedly connected to the piece shaft. When the piece shaft rotates, it can drive the indicator needle to rotate. The outlet of the merging oil circuit is connected to the third relief valve, and the third relief valve is connected to the external oil tank.

[0009] To optimize the above technical solutions, the specific measures taken also include:

[0010] The oil-dividing valve core comprises an upper front oil-dividing chamber, a lower front oil-dividing chamber, an upper valve core chamber, a lower valve core chamber, an upper left oil-dividing pipe, a lower right oil-dividing pipe, a first gear, a second gear, a third gear and a fourth gear, and the oil-dividing valve core is divided into two mutually isolated upper and lower layers, wherein the upper front oil-dividing chamber, the upper valve core chamber, the upper left oil-dividing pipe, the first gear and the second gear are located in the upper layer, the lower front oil-dividing chamber, the lower valve core chamber, the lower right oil-dividing pipe, the third gear and the fourth gear are located in the lower layer, the upper front oil-dividing chamber is connected to the oil inlet, the upper front oil-dividing chamber is communicated with the lower front oil-dividing chamber, the upper front oil-dividing chamber is communicated with the front end of the upper valve core chamber, the first gear The first gear and the second gear are arranged in the upper valve core chamber in a mutually meshing manner, and the first gear and the second gear are respectively sealed with the side wall of the upper valve core chamber, the rear end of the upper valve core chamber is connected to the front end of the upper left oil distribution pipe, the rear end of the upper left oil distribution pipe is connected to the left oil circuit, the front lower oil distribution chamber is connected to the front end of the lower valve core chamber, the third gear and the fourth gear are arranged in the lower valve core chamber in a mutually meshing manner, and the third gear and the fourth gear are respectively sealed with the side wall of the lower valve core chamber, the first gear wheel center and the third gear wheel center are mutually connected through a gear shaft, and the second gear wheel center and the fourth gear wheel center are mutually connected through a gear shaft.

[0011] A first overflow valve is connected to the left oil circuit, and the first overflow valve includes a first adjusting nut, a first spring, a first sealing ball, a first valve chamber, a first overflow inlet hole and a first overflow outlet hole. The first adjusting nut is installed on the diverter housing, and the first adjusting nut extends into the first valve chamber. The first spring and the first sealing ball are both arranged in the first valve chamber. The first overflow inlet hole and the first overflow outlet hole are both connected to the first valve chamber. One end of the first spring is connected to the first adjusting nut, and the other end is connected to the first sealing ball. The first sealing ball is pressed against the first overflow inlet hole to seal the first overflow inlet hole. The first overflow inlet hole is connected to the left oil circuit, and the first overflow outlet hole is connected to the external oil tank.

[0012] The right oil circuit is connected with a second overflow valve, the structure of which is completely the same as that of the first overflow valve, wherein a second overflow inlet hole of the second overflow valve is communicated with the right oil circuit.

[0013] The left steering valve and the right steering valve have the same structure, both including a rotating handle and a rotating column connected to each other. The rotating column is provided with an oil path through hole and a detection path through hole, the oil path through hole is on the top, and the detection path through hole is on the bottom, and the oil path through hole and the detection path through hole are perpendicular to each other in the horizontal direction.

[0014] Part of the pipelines of the left oil circuit and part of the pipelines of the left self-test oil circuit are arranged in parallel up and down, the rotating column of the left steering valve penetrates into the left oil circuit and the left self-test oil circuit at the same time, the rotating handle of the left steering valve is located on the upper surface of the diverter housing, the oil circuit through hole of the left steering valve is located in the left oil circuit, and the inspection circuit through hole of the left steering valve is located in the left self-test oil circuit. When the left steering valve rotates, one and only one of the oil circuit through hole and the inspection circuit through hole of the left steering valve can be connected to the corresponding oil circuit.

[0015] Part of the pipelines of the right oil circuit and part of the pipelines of the right self-test oil circuit are arranged in parallel up and down, the rotating column of the right steering valve penetrates into the right oil circuit and the right self-test oil circuit at the same time, the rotating handle of the right steering valve is located on the upper surface of the diverter housing, the oil circuit through hole of the right steering valve is located in the right oil circuit, and the inspection circuit through hole of the right steering valve is located in the right self-test oil circuit. When the right steering valve rotates, one and only one of the oil circuit through hole and the inspection circuit through hole of the right steering valve can be connected to the corresponding oil circuit.

[0016] The flow measuring piece is a diamond-shaped piece, and baffles are respectively provided on the incoming flow side and the outgoing flow side of the flow measuring piece. There is a gap between the baffle and the flow measuring piece. When the flow measuring piece rotates left or right to a predetermined angle, the baffle can block the flow measuring piece to prevent the flow measuring piece from excessive rotation.

[0017] The third overflow valve includes a detection overflow chamber, a detection spring, a detection sealing ball, a detection overflow inlet hole and a detection overflow outlet hole. The detection overflow inlet hole and the detection overflow outlet hole are both opened on the detection overflow chamber. The detection spring and the detection sealing ball are both located in the detection overflow chamber. One end of the detection spring is fixedly connected to the inner wall of the detection overflow chamber, and the other end is connected to the detection sealing ball. The detection sealing ball seals the detection overflow inlet hole under the pressure of the detection spring. The detection overflow inlet hole is connected to the combined oil circuit, and the detection overflow outlet hole is connected to the external oil tank.

[0018] The dial of the indicator is divided into two areas, namely the normal area and the excess area. When the left and right ends of the flow meter are not subjected to force or the force is balanced, the indicator needle points to the normal area. When the left and right ends of the flow meter are subjected to unbalanced force and exceed the threshold, the indicator needle points to the excess area.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention adds a self-checking structure to the flow divider, the self-checking structure includes self-checking oil circuits respectively connected to the left and right oil circuits, the self-checking oil circuits merge into the merging oil circuit, a flow measuring plate is installed in the merging oil circuit, the flow measuring plate is close to the inlet position of the merging oil circuit, when the oil from the left and right self-checking oil circuits entering the merging oil circuit is balanced, the impact forces on the left and right sides of the flow measuring plate are equal or very close, so that the pointer of the indicator coaxial with the flow measuring plate will point to the normal area in the middle of the dial, when there is a problem with the oil output of one side of the oil circuit, the oil from the left and right self-checking oil circuits entering the merging oil circuit is unbalanced, the flow measuring plate will inevitably be subjected to greater force on one side than the other side, the flow measuring plate rotates, and the pointer of the indicator plate will point to the excess area on both sides of the dial, thereby knowing whether the flow divider has a fault. The self-test structure of the present invention is extremely simple. Since it is only necessary to detect whether the flow of the left and right oil circuits is balanced, and there is no need to measure the specific flow value or hydraulic value of the left and right oil circuits, there is no need to use a pressure gauge or flow meter with a large volume and complex structure. The change to the diverter is small. The self-test oil circuit, the converging oil circuit and the third overflow valve chamber can be etched in the idle position of the original diverter. The volume of the diverter is not increased, and it is easy to use.

[0021] The present invention does not need to remove the diverter from the equipment during self-inspection. It only needs to turn the left and right steering valves 90 degrees, connect the self-inspection oil circuit and close the left and right oil circuits at the same time, and then in-situ inspection can be performed, thereby greatly reducing the time cost and inspection cost of troubleshooting the diverter fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a left side view of the diverter of the present invention;

[0023] Figure 2 is a top view of the diverter of the present invention;

[0024] Figure 3 is a front view of the diverter of the present invention;

[0025] Figure 4 is a rear view of the diverter of the present invention;

[0026] Figure 5 When the shunt is in normal use Figure 1 AA section view;

[0027] Figure 6 When the shunt is in normal use Figure 1 BB cross-sectional view;

[0028] Figure 7 When the shunt switches to self-test mode Figure 1 AA section view;

[0029] Figure 8 When the shunt switches to self-test mode Figure 1 BB cross-sectional view;

[0030] Fig. 9 yes Figure 8 Enlarged view of the structure of the middle C section;

[0031] Fig.10 It is a structural diagram of a steering valve.

[0032] The accompanying drawings are marked as follows: diverter housing 1, oil inlet 11, oil outlet 12, left oil circuit 13, right oil circuit 14, oil distribution valve core 2, front upper oil distribution chamber 20, front lower oil distribution chamber 21, upper valve core chamber 22, lower valve core chamber 23, upper left oil distribution pipe 24, lower right oil distribution pipe 25, first gear 26, second gear 27, third gear 28, fourth gear 29, self-test structure 3, left steering valve 31, handle 31a, rotating column 31b, oil circuit through hole 31c, inspection circuit through hole 31d, left self-test oil circuit 32, right Steering valve 33, right self-test oil circuit 34, merging oil circuit 35, flow measuring plate 36, plate shaft 36a, indicator gauge 37, indicator needle 37a, third overflow valve 38, detection overflow chamber 38a, detection spring 38b, detection sealing ball 38c, detection overflow inlet hole 38d, detection overflow outlet hole 38e, baffle 39, first overflow valve 4, first adjusting nut 41, first spring 42, first sealing ball 43, first valve chamber 44, first overflow inlet hole 45, first overflow outlet hole 46, second overflow valve 5. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0034] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0035] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0036] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation and may indicate the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or units (units) is not limited to the listed steps or units, but may also include unlisted steps or units, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" / "several" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0037] A flow divider with an in-situ self-checking function, the main structures of which include a flow divider housing 1, an oil dividing valve core 2, a self-checking structure 3, a first overflow valve 4, a second overflow valve 5 and other main structures. The flow divider housing 1 is also provided with main oil pipelines such as a left oil circuit 13, a right oil circuit 14, a left self-checking oil circuit 32, and a right self-checking oil circuit 34.

[0038] like Figure 1-4 As shown, the diverter housing 1 includes an upper housing and a lower housing. The two housings can be separated so that various pipelines can be etched in the diverter housing 1 and the oil separator valve core 2 and the overflow valve can be installed. The base mounting frames are installed on both sides of the lower housing. The base mounting frames are used to install the diverter housing 1 at the corresponding position of the equipment. An overflow mounting port is set on the upper surface and the lower surface of the diverter housing 1. One of the two overflow mounting ports is connected to the overflow outlet hole of the first overflow valve 4 and the other is connected to the overflow outlet hole of the second overflow valve 5 in the diverter housing 1. The overflow mounting port is connected to the oil tank through a pipeline. The diverter housing 1 is made of stainless steel.

[0039] In this embodiment, the oil-dividing valve core 2 is a gear-type flow-dividing valve. The structure of the oil-dividing valve core 2 is divided into the upper front oil-dividing chamber 20, the lower front oil-dividing chamber 21, the upper valve core chamber 22, the lower valve core chamber 23, the upper left oil-dividing pipe 24, the lower right oil-dividing pipe 25, the first gear 26, the second gear 27, the third gear 28, the fourth gear 29 and other main structures. The pipelines and structures inside the flow divider are divided into upper and lower layers, such as Figure 5-6 As shown, Figure 5 For the upper structure diagram, Figure 6 The lower structure diagram shows that the valve core structure of the upper structure and the valve core structure of the lower structure are completely sealed and isolated, wherein only the front upper oil chamber 20 and the front lower oil chamber 21 are an integral chamber and are interconnected. The first gear 26, the second gear 27, the third gear 28 and the fourth gear 29 are of the same size, the first gear 26 and the second gear 27 are meshed with each other, and are located in the upper valve core chamber 22, and the outer side tooth tips of the first gear 26 and the second gear 27 are sealed with the side of the upper valve core chamber 22, the third gear 28 and the fourth gear 29 are meshed with each other, and are located in the lower valve core chamber 23, and the outer side tooth tips of the third gear 28 and the fourth gear 29 are sealed with the side of the lower valve core chamber 23, the first gear 26 and the third gear 28 are coaxially connected, and the second gear 27 and the fourth gear 29 are coaxially connected.

[0040] The flow diversion principle of the oil-dividing valve core 2 is as follows: the high-pressure oil in the front upper oil-dividing chamber 20 drives the first gear 26 and the second gear 27 to rotate at the same speed. During the rotation of the first gear 26 and the second gear 27, the tooth gap of each tooth will carry a certain amount of oil from the side of the upper valve core chamber 22 into the upper left oil-dividing pipe 24. Similarly, since the third gear 28 and the fourth gear 29 are coaxial with the first gear 26 and the second gear 27, the third gear 28 and the fourth gear 29 input an equal amount of oil into the front lower oil-dividing chamber 21.

[0041] Due to long-term use, the sealing between the gear and the valve core cavity will decrease due to damage of a gear tooth or other reasons, causing the oil in the high-pressure area to move to the low-pressure area through the gap, that is, the oil distribution pipe where the damaged gear is located will get more oil, resulting in uneven oil supply to the upper left oil distribution pipe 24 and the lower right oil distribution pipe 25.

[0042] The self-checking structure 3 includes a left steering valve 31 , a left self-checking oil circuit 32 , a right steering valve 33 , a right self-checking oil circuit 34 , a merging oil circuit 35 , a flow measuring piece 36 , an indicator 37 , a third overflow valve 38 , a baffle 39 and other structures.

[0043] The left steering valve 31 and the right steering valve 33 have the same structure. Fig.10 As shown, it includes a rotating handle 31a and a rotating column 31b, and the rotating column 31b is provided with an oil path through hole 31c and a detection path through hole 31d, the oil path through hole 31c is on the top, and the detection path through hole 31d is on the bottom, and the oil path through hole 31c and the detection path through hole 31d are perpendicular to each other in the horizontal direction.

[0044] The left self-test oil circuit 32 and the right self-test oil circuit 34 are mostly located in the lower layer. The front end of the left self-test oil circuit 32 is connected to the left oil circuit 13, and the rear end is connected to the self-test oil circuit 34. The front end of the right self-test oil circuit 34 is connected to the right oil circuit 14, and the rear end is connected to the self-test oil circuit 34. The self-test oil circuit 34 is a pipeline twice as wide as the left self-test oil circuit 32 and the right self-test oil circuit 34. The left self-test oil circuit 32 is connected to the left upper end of the self-test oil circuit 34, and the right self-test oil circuit 34 is connected to the right upper end of the self-test oil circuit 34. Fig. 9 It can be clearly seen that, taking the left steering valve 31 as an example, Figure 5 and 6 In the figure, the left steering valve 31 connects the left oil circuit 13 and closes the left self-test oil circuit 32. The oil flows in the direction indicated by the arrow in the figure. When the left steering valve 31 rotates 90°, the left oil circuit 13 is closed and the left self-test oil circuit 32 is connected. Figure 7 and 8 The oil flow direction is as indicated by the arrow in the figure.

[0045] The flow measuring piece 36 is installed near the inlet of the confluent oil circuit 35. A piece shaft 36a is fixed at the center of the flow measuring piece 36. The piece shaft 36a can be rotatably installed in the confluent oil circuit 35. The left end of the flow measuring piece 36 is close to the left side of the confluent oil circuit 35, and the right end of the flow measuring piece 36 is close to the right side of the confluent oil circuit 35. The oil from the left self-test oil circuit 32 and the right self-test oil circuit 34 can impact the left end and the right end of the flow measuring piece 36 respectively, so that the flow measuring piece 36 rotates. The indicator meter 37 is installed on the surface of the diverter housing 1. An indicator needle 37a is arranged in the indicator meter 37. The root of the indicator needle 37a is fixedly connected to the piece shaft 36a. When the piece shaft 36a rotates, it can drive the indicator needle 37a to rotate. The outlet of the confluent oil circuit 35 is connected to the third relief valve 38, and the third relief valve 38 is connected to one of the relief installation ports. The relief pressure threshold of the third relief valve 38 is lower than that of the first and second relief valves.

[0046] The flow measuring piece 36 is a diamond-shaped piece, and a baffle 39 is provided on the incoming flow side and the outgoing flow side of the flow measuring piece 36, respectively. There is a gap between the baffle 39 and the flow measuring piece 36. When the flow measuring piece 36 rotates left and right to a predetermined angle, the baffle 39 can block the flow measuring piece 36 to prevent the flow measuring piece 36 from excessively rotating. The angle at which the baffle 39 blocks the flow measuring piece 36 from rotating is between 45° and 60°.

[0047] The first overflow valve 4, the second overflow valve 5 and the third overflow valve 38 are similar in structure, and the difference is that the first overflow valve 4 and the second overflow valve 5 have an adjusting nut which can adjust the spring force, so as to adjust the overflow pressure of the overflow valve.

[0048] The flow divider of the present invention, when used, has the following requirements:

[0049] 1. In order to ensure the efficient and accurate operation of the diverter, it is best for the diverter to operate near the rated input flow point.

[0050] 2. The minimum speed of the internal gear of the diverter is 500 rpm and the maximum speed is 3500 rpm. The inlet pressure value of the diverter and the maximum pressure difference between each outlet must be within the specified range.

[0051] 3. Overflow valves should be installed at both the inlet and outlet to ensure that the pressure does not exceed the rated value.

[0052] 4. The diverter is used when the oil is flowing. If the oil is not flowing, the diverter will not work.

[0053] 5. It is recommended to use petroleum-based hydraulic oil with a filtration accuracy of 25 microns.

[0054] 6. Do not use plastic tape for sealing during installation.

[0055] When the flow divider of the present invention is used, the oil inlet 11 is connected to the oil pump, the two oil outlets 12 are connected to the equipment that needs to divide the oil in equal amounts, and the two overflow installation ports are connected to the oil tank. In normal use, the left steering valve 31 and the right steering valve 33 are simultaneously turned to the working state, such as Figure 2 As shown, at this time, the oil flow direction in the diverter is as follows Figure 5-6 As shown in FIG. 1 , when the diverter needs to be self-checked, the diverter does not need to be removed. Instead, the left steering valve 31 and the right steering valve 33 are turned 90° at the same time, and the oil pump normally inputs oil to the oil inlet 11. At this time, the oil flow direction in the diverter is as follows: Figure 7-8 By observing the indicator gauge 37, it can be determined whether the shunt is damaged. If the indicator needle 37a is stably in the normal range of the dial, the shunt function is normal. If the indicator needle 37a shakes greatly for a long time or is in the excessive range of the dial, the shunt function is abnormal.

[0056] The above are preferred embodiments of the present application, but those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0057] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A flow divider with an in-situ self-checking function, comprising a flow divider housing (1), the flow divider housing (1) comprising an oil inlet (11) and two left and right oil outlets (12), an oil separation valve core (2), a left oil circuit (13) and a right oil circuit (14) are arranged in the flow divider housing (1), the oil inlet (11) is connected to the inlet end of the oil separation valve core (2), the oil separation valve core (2) divides the incoming oil into two equal parts, and respectively inputs them into the left oil circuit (13) and the right oil circuit (14), the left oil circuit (13) and the right oil circuit (14) are respectively connected to an oil outlet (12), wherein: A self-test structure (3) is also provided in the diverter housing (1). The self-test structure (3) comprises a left steering valve (31), a left self-test oil circuit (32), a right steering valve (33), a right self-test oil circuit (34), a merging oil circuit (35), a flow measuring plate (36), an indicator (37) and a third overflow valve (38). The left steering valve (31) is used to change the left oil circuit (13) to communicate with the inlet of the left self-test oil circuit (32). The right steering valve (33) is used to change the right oil circuit (14) to communicate with the inlet of the right self-test oil circuit (34). The outlet of the left self-test oil circuit (32) is connected to the left side of the inlet end of the merging oil circuit (35). The outlet of the right self-test oil circuit (34) is connected to the right side of the inlet end of the merging oil circuit (35). The flow measuring plate (36) is installed near the inlet of the merging oil circuit (35). The flow measuring plate (36) A plate shaft (36a) is fixed at the center. The plate shaft (36a) is rotatably installed in the converging oil circuit (35). The left end of the flow measuring plate (36) is close to the left side of the converging oil circuit (35), and the right end of the flow measuring plate (36) is close to the right side of the converging oil circuit (35). The oil from the left self-test oil circuit (32) and the right self-test oil circuit (34) can impact the left end and the right end of the flow measuring plate (36) respectively, so that the flow measuring plate (36) rotates. The indicator gauge (37) is installed on the surface of the diverter housing (1). An indicator needle (37a) is arranged in the indicator gauge (37). The root of the indicator needle (37a) is fixedly connected to the plate shaft (36a). When the plate shaft (36a) rotates, it can drive the indicator needle (37a) to rotate. The outlet of the converging oil circuit (35) is connected to the third overflow valve (38), and the third overflow valve (38) is connected to the external oil tank.The oil-dividing valve core (2) comprises an upper front oil-dividing chamber (20), a lower front oil-dividing chamber (21), an upper valve core chamber (22), a lower valve core chamber (23), an upper left oil-dividing pipe (24), a lower right oil-dividing pipe (25), a first gear (26), a second gear (27), a third gear (28) and a fourth gear (29). The oil-dividing valve core (2) is divided into upper and lower layers which are isolated from each other, wherein the upper front oil-dividing chamber (20), the upper valve core chamber (22), the upper left oil-dividing pipe (24), the first gear (26) and the second gear (27) are located in the upper layer, and the lower front oil-dividing chamber (21), the lower valve core chamber (23), the lower right oil-dividing pipe (25), the third gear (28) and the fourth gear (29) are located in the lower layer. The upper front oil-dividing chamber (20) is connected to the oil inlet (11) by a plurality of connecting rods. ), the front upper oil chamber (20) is connected with the front lower oil chamber (21), the front upper oil chamber (20) is connected with the front end of the upper valve core chamber (22), the first gear (26) and the second gear (27) are arranged in the upper valve core chamber (22) in a meshing manner, and the first gear (26) and the second gear (27) are respectively sealed with the side wall of the upper valve core chamber (22), the rear end of the upper valve core chamber (22) is connected with the front end of the left upper oil pipe (24), the rear end of the left upper oil pipe (24) is connected with the left oil path (13), the front lower oil chamber (21) is connected with the front end of the lower valve core chamber (23), the third gear (28) and the fourth gear (29) are arranged in the lower valve core chamber (23) in a meshing manner, and the third gear (28) and the fourth gear (29) are respectively The first gear (26) and the third gear (28) are respectively sealed with the side wall of the lower valve core chamber (23); the first gear (26) and the third gear (28) are connected to each other through a gear shaft; the second gear (27) and the fourth gear (29) are connected to each other through a gear shaft; the left oil circuit (13) is connected with a first overflow valve (4); the first overflow valve (4) comprises a first adjusting nut (41), a first spring (42), a first sealing ball (43), a first valve chamber (44), a first overflow inlet hole (45) and a first overflow outlet hole (46); the first adjusting nut (41) is mounted on the diverter housing (1); the first adjusting nut (41) extends into the first valve chamber (44); the first spring (42), the first sealing ball (43) 43) are both arranged in the first valve cavity (44), the first overflow inlet hole (45) and the first overflow outlet hole (46) are both connected to the first valve cavity (44), one end of the first spring (42) is connected to the first adjusting nut (41), and the other end is connected to the first sealing ball (43), the first sealing ball (43) presses against the first overflow inlet hole (45) to seal the first overflow inlet hole (45), the first overflow inlet hole (45) is connected to the left oil circuit (13), and the first overflow outlet hole (46) is connected to the external oil tank; the right oil circuit (14) is connected to the second overflow valve (5), the structure of the second overflow valve (5) is completely the same as that of the first overflow valve (4), wherein the second overflow inlet hole of the second overflow valve (5) is connected to the right oil circuit (14). ; 2. The shunt with in-situ self-checking function according to claim 1 is characterized in that: The left steering valve (31) and the right steering valve (33) have the same structure, and both comprise a rotating handle (31a) and a rotating column (31b) connected to each other. The rotating column (31b) is provided with an oil path through hole (31c) and a detection path through hole (31d). The oil path through hole (31c) is located at the top, and the detection path through hole (31d) is located at the bottom. The oil path through hole (31c) and the detection path through hole (31d) are perpendicular to each other in the horizontal direction.

3. The shunt with in-situ self-checking function according to claim 2 is characterized in that: Part of the pipeline of the left oil circuit (13) and part of the pipeline of the left self-test oil circuit (32) are arranged in parallel up and down; the rotating column (31b) of the left steering valve (31) penetrates into the left oil circuit (13) and the left self-test oil circuit (32) at the same time; the rotating handle (31a) of the left steering valve (31) is located on the upper surface of the diverter housing (1); the oil circuit through hole (31c) of the left steering valve (31) is located in the left oil circuit (13); the inspection circuit through hole (31d) of the left steering valve (31) is located in the left self-test oil circuit (32); when the left steering valve (31) rotates, only one of the oil circuit through hole (31c) and the inspection circuit through hole (31d) of the left steering valve (31) can be connected to the corresponding oil circuit.

4. The shunt with in-situ self-checking function according to claim 3 is characterized in that: Part of the pipeline of the right oil circuit (14) and part of the pipeline of the right self-test oil circuit (34) are arranged in parallel up and down, the rotating column (31b) of the right steering valve (33) penetrates into the right oil circuit (14) and the right self-test oil circuit (34) at the same time, the rotating handle (31a) of the right steering valve (33) is located on the upper surface of the diverter housing (1), the oil circuit through hole (31c) of the right steering valve (33) is located in the right oil circuit (14), and the inspection circuit through hole (31d) of the right steering valve (33) is located in the right self-test oil circuit (34), when the right steering valve (33) rotates, only one of the oil circuit through hole (31c) and the inspection circuit through hole (31d) of the right steering valve (33) can be connected to the corresponding oil circuit.

5. The shunt with in-situ self-checking function according to claim 4 is characterized in that: The flow measuring piece (36) is a diamond-shaped piece. The incoming flow side and the outgoing flow side of the flow measuring piece (36) are respectively provided with baffles (39). A gap is provided between the baffle (39) and the flow measuring piece (36). When the flow measuring piece (36) rotates left and right to a predetermined angle, the baffle (39) can block the flow measuring piece (36) to prevent the flow measuring piece (36) from excessively rotating.

6. The shunt with in-situ self-checking function according to claim 5, characterized in that: The third overflow valve (38) comprises a detection overflow chamber (38a), a detection spring (38b), a detection sealing ball (38c), a detection overflow inlet hole (38d) and a detection overflow outlet hole (38e). The detection overflow inlet hole (38d) and the detection overflow outlet hole (38e) are both opened on the detection overflow chamber (38a). The detection spring (38b) and the detection sealing ball (38c) are both located in the detection overflow chamber (38a). One end of the detection spring (38b) is fixedly connected to the inner wall of the detection overflow chamber (38a), and the other end is connected to the detection sealing ball (38c). The detection sealing ball (38c) seals the detection overflow inlet hole (38d) under the pressure of the detection spring (38b). The detection overflow inlet hole (38d) is connected to the combined oil circuit (35), and the detection overflow outlet hole (38e) is connected to the external oil tank.

7. A shunt with in-situ self-checking function according to any one of claims 1 to 6, characterized in that: The dial of the indicator (37) is divided into two areas, namely a normal area and an excess area. When the left and right ends of the flow measuring piece (36) are not subjected to force or the forces are balanced, the indicator needle (37a) points to the normal area. When the left and right ends of the flow measuring piece (36) are subjected to unbalanced forces and exceed a threshold value, the indicator needle (37a) points to the excess area.

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