Oil passage structure of heat exchange valve processing jig

Abstract

This utility model relates to the technical field of heat exchange valve processing equipment, and discloses an oil circuit structure for a heat exchange valve processing fixture, including a base, a fixture, a pipe bracket, an adapter sleeve, and a connecting column. The fixture is mounted on the base for fixing and clamping the heat exchange valve. The pipe bracket is mounted on the base. The inner wall of the adapter sleeve has threads for connecting with a shaft. The outer wall of the adapter sleeve has multiple oil inlets, and an oil passage gap is left between the threads and the shaft for oil to pass through. One end of the connecting column is connected to the adapter sleeve, and the other end is connected to the pipe bracket. The connecting column has a first oil circuit channel inside, and the pipe bracket has a second oil circuit channel inside. By hiding the oil circuit channels inside the connecting column, pipe bracket, and base, wear and contamination are avoided. Furthermore, the rotation of the shaft does not cause the oil inlets and oil circuit channels to rotate, thus preventing damage to the oil circuit channels and ensuring their normal operation.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchange valve processing equipment, and in particular to an oil circuit structure for a heat exchange valve processing fixture. Background Technology

[0002] Heat exchange valves are key components in heat exchange systems used to control the direction, flow rate, or on / off state of fluid flow. Their core function is to ensure efficient and stable heat transfer by adjusting fluid parameters. When machining the valve body flow channel and flange plane of a heat exchange valve, a fixture is needed to fix the heat exchange valve on the machine tool table to ensure the accurate relative position of the machining surface and the cutting tool.

[0003] For example, Chinese utility model patent with announcement number CN217860142U discloses a hydraulic clamping fixture for a multi-axis CNC machining center, and Chinese utility model patent with announcement number CN212552817U discloses a special precision machining fixture for the middle housing of an automobile gearbox.

[0004] In the aforementioned technical solution with announcement number CN212552817U, the oil passage of the machining fixture is often exposed outside the machine tool. It is easily worn and broken due to the impact of debris and friction during the machining process. At the same time, the exposed oil passage is easily contaminated with oil, polluting the machining environment. In the aforementioned technical solution with announcement number CN217860142U, due to the size and specifications of the machine tool, when the position of the parts on the machine tool changes, the position of the oil passage changes synchronously, which can easily cause the oil passage to twist and be damaged, affecting the normal operation of the machining fixture. Utility Model Content

[0005] To overcome at least one of the defects described in the prior art, this utility model provides an oil passage structure for a heat exchange valve machining fixture. By concealing the oil passage inside the connecting column, pipe bracket, and base to avoid wear and contamination, and by preventing the oil inlet and oil passage from rotating when the shaft rotates, damage to the oil passage is avoided, ensuring the normal operation of the oil passage.

[0006] The technical solution of this utility model is implemented as follows: An oil circuit structure for a heat exchange valve machining fixture includes a base, a fixture, a pipe support, an adapter sleeve, and a connecting column. The fixture is mounted on the base for fixing and clamping the heat exchange valve. The pipe support is mounted on the base. The inner wall of the adapter sleeve is provided with threads for connection with a shaft. The outer wall of the adapter sleeve is provided with multiple oil inlets, and an oil passage gap is left between the threads and the shaft for oil to pass through. One end of the connecting column is connected to the adapter sleeve, and the other end is connected to the pipe support. The connecting column has a first oil passage, the pipe support has a second oil passage, and the base has a third oil passage. The oil passage gap communicates sequentially with the first, second, and third oil passages. Oil flowing through the third oil passage drives the longitudinal displacement of the fixture.

[0007] Based on the above technical solutions, preferably, the clamp includes a first hydraulic cylinder, a pressure plate, a fixed frame, a first pressure block, a second hydraulic cylinder, and a second pressure block. The first hydraulic cylinder is disposed on opposite sides of the heat exchange valve. The pressure plate is operatively connected to the output end of the first hydraulic cylinder for pressing the heat exchange valve. The fixed frame is disposed between the first hydraulic cylinders on opposite sides. The first pressure block is disposed above the fixed frame for abutting against the heat exchange valve. The second hydraulic cylinder is disposed beside the fixed frame. The second pressure block is operatively connected to the output shaft of the second hydraulic cylinder. The first pressure block and the second pressure block form a longitudinal clamping mechanism for the heat exchange valve.

[0008] Based on the above technical solutions, preferably, the pipe rack includes a column frame and a mounting frame, wherein the column frame is vertically arranged on the base, and the mounting frame is vertically arranged on the top of the column frame.

[0009] Based on the above technical solutions, preferably, the pipe rack further includes a connecting frame, wherein the connecting frame is disposed between the column frame and the mounting frame.

[0010] Based on the above technical solutions, preferably, the first oil passage is provided with multiple channels, and the multiple first oil passages are arranged at intervals along the circumference of the connecting column.

[0011] Based on the above technical solutions, preferably, the number of the second oil passage is the same as that of the first oil passage, and the second oil passage is connected to the first oil passage in a one-to-one correspondence.

[0012] Based on the above technical solutions, preferably, the number of the third oil passage is the same as that of the second oil passage, and the third oil passage is connected to the second oil passage in a one-to-one correspondence.

[0013] Based on the above technical solutions, preferably, each of the third oil passages is connected to the first oil cylinder or the second oil cylinder.

[0014] Based on the above technical solutions, preferably, it also includes a placement platform, which is disposed on the base and used to place the heat exchange valve.

[0015] Based on the above technical solutions, preferably, a support structure is also included, with the base mounted on the support structure to reserve assembly space between the base and the horizontal plane.

[0016] In summary, the oil circuit structure of the heat exchange valve machining fixture provided by this utility model has the following advantages over the prior art: (1) By setting a first oil passage inside the connecting column, a second oil passage inside the pipe rack, and a third oil passage inside the base, the oil can flow in these internal channels. Compared with the exposed oil supply pipes of traditional machining fixtures, this can effectively avoid wear and breakage of the pipes caused by the impact of machining debris and friction during handling, and reduce the risk of pipe damage. (2) The oil passages are no longer exposed, which reduces the possibility of oil stains on the machine tool equipment, effectively avoids oil pollution of the processing environment, and helps to maintain the cleanliness of the machine tool processing environment; (3) The oil transmission relies on the oil passages inside the connecting column, pipe rack and base. These passages are fixed with the components and will not change position or twist due to the change of the position of the components on the machine tool. This can avoid the torsional damage caused by the synchronous position change of the oil passages in traditional fixtures, ensure the stability of oil transmission and ensure the normal operation of the machining fixture. (4) When the shaft rotates, it will not drive the oil inlet on the adapter sleeve to rotate synchronously, nor will it drive the oil passage to rotate synchronously, so that the oil inlet and oil passage can work normally, ensuring the stability and reliability of the oil supply of the machining fixture cylinder. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of the base and clamp according to an embodiment of the present utility model; Figure 3This is a partial structural schematic diagram of the clamp according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the planar structure of the adapter sleeve and connecting post according to an embodiment of the present utility model; Figure 5 In this utility model Figure 4 Sectional view along axis AA; Figure 6 This is a three-dimensional structural diagram of the adapter sleeve according to an embodiment of the present utility model; Figure 7 This is a schematic cross-sectional view of the mounting bracket according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the first three-dimensional structure of the column frame according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the second three-dimensional structure of the column frame according to an embodiment of the present utility model; Figure 10 This is a schematic cross-sectional view of the base structure according to an embodiment of the present utility model.

[0019] The meanings of the reference numerals in the attached drawings are as follows: 1. Base; 11. Third oil passage; 12. Connecting passage; 2. Clamp; 21. First oil cylinder; 22. Pressure plate; 23. Fixing frame; 24. First pressure block; 25. Second oil cylinder; 26. Second pressure block; 27. Connecting rod; 28. Mounting plate; 3. Pipe rack; 31. Second oil passage; 32. Column rack; 33. Mounting frame; 34. Connecting frame; 4. Adapter sleeve; 41. Thread; 42. Oil inlet; 43. Oil passage clearance; 5. Connecting column; 51. First oil passage; 6. Heat exchange valve; 7. Placement platform; 8. Support structure; 10. Shaft. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0021] See Figures 1-10 This utility model discloses a heat exchange valve processing fixture, including a base 1, a fixture 2, a pipe rack 3, an adapter sleeve 4, and a connecting column 5.

[0022] like Figure 2 and Figure 3 As shown, the clamp 2 is mounted on the base 1 and is used to fix and clamp the heat exchange valve 6. As described above, when machining the valve body flow channel and flange plane of the heat exchange valve 6, it is necessary to ensure that the relative position of the machining surface and the tool is accurate. The fixture 2 is set on the base 1. The base 1 serves as the basic support component of the entire machining fixture 2, and has good stability and rigidity. It can provide a stable mounting platform for the fixture 2, so that the fixture 2 can maintain a relatively fixed position during the machine tool operation.

[0023] In some embodiments, see Figure 2 As shown, it also includes a placement platform 7, which is located above the base 1 and is used to place the heat exchange valve 6. The heat exchange valve 6 is placed above the placement platform 7. Specifically, the placement position and number of placement platforms 7 are not specifically limited here, as long as it can be ensured that the heat exchange valve 6 does not shake when placed on the placement platform 7. As described above, since the bottom surface of the heat exchange valve 6 is not a flat structure, the placement platform 7 is set to fit against the bottom surface of the heat exchange valve 6 to reduce the machining error caused by the shaking or displacement of the fixture 2.

[0024] like Figure 1 , Figure 2 and Figure 6 As shown, the pipe rack 3 is disposed on the base 1 and is fixed to the base 1 by fasteners. Specifically, the fasteners are nut structures, which can be easily fixed to the base 1. As described above, the pipe rack 3 is mounted on the base 1 with fasteners. The installation and fixing process is simple, and disassembly and maintenance are also convenient. In addition, the pipe rack 3 can avoid other processing parts of the machine tool, thus providing space efficiency.

[0025] like Figure 5 and Figure 6 As shown, the inner wall of the adapter sleeve 4 is provided with a thread 41 for connecting with the shaft 10; the outer wall of the adapter sleeve 4 is provided with multiple oil inlets 42, and the arrangement of the multiple oil inlets 42 can be matrix arrangement, linear arrangement, or circumferential arrangement, which is not specifically limited here. There is an oil passage gap 43 between the thread 41 and the shaft 10 for the oil to pass through. The end of the oil inlet 42 is connected to an external oil supply device such as an oil supply pump so that the oil in the oil supply pump is sent into the oil passage gap 43 through the oil inlet 42. As described above, the shaft 10 will bear forces and torques in various directions. The threaded connection 41 can effectively prevent the shaft 10 from loosening or falling off from the adapter sleeve 4. In addition, multiple oil inlets 42 can supply oil from different directions to ensure normal oil flow. Furthermore, the integrated design of the oil inlet 42 and the adapter sleeve 4 reduces the number of parts in the machining fixture 2, making the entire structure more compact and saving space. Especially when the space of the machine tool is limited, it provides more space for the installation and layout of other components.

[0026] like Figure 1 and Figure 4 As shown, one end of the connecting post 5 is connected to the adapter sleeve 4, and the other end is connected to the pipe rack 3; specifically, one end of the connecting post 5 is connected to the adapter sleeve 4 by a fastener, and the other end of the connecting post 5 is also connected to the pipe rack 3 by a fastener; the installation and fixing process is simple, and disassembly and maintenance are also very convenient; specifically, the fastener is a nut structure.

[0027] like Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the connecting column 5 has a first oil passage 51 inside, the pipe frame 3 has a second oil passage 31 inside, and the base 1 has a third oil passage 11 inside. The oil passage gap 43 is connected to the first oil passage 51, the second oil passage 31 and the third oil passage 11 in sequence. The oil flowing through the third oil passage 11 is used to drive the longitudinal displacement of the clamp 2. As described above, the oil in the oil pump flows into the oil passage gap 43 through the oil inlet 42, and then sequentially passes through the first oil passage 51, the second oil passage 31, and the third oil passage 11 into the oil cylinder of the clamp 2 to provide power for the movement of the clamp 2. This forms a complete oil transmission path, ensuring that the oil can flow smoothly from the oil source through each passage in sequence, and finally reach the actuator that drives the longitudinal displacement of the clamp 2. This avoids the problem of oil interruption or poor backflow during transmission, and ensures the stability and reliability of the oil supply.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the clamp 2 includes a first hydraulic cylinder 21, a pressure plate 22, a fixing frame 23, a first pressure block 24, a second hydraulic cylinder 25, and a second pressure block 26. The first hydraulic cylinder 21 is disposed on opposite sides of the heat exchange valve 6, and the pressure plate 22 is connected to the output end of the first hydraulic cylinder 21 for pressing and holding the heat exchange valve 6. As described above, first hydraulic cylinders 21 are arranged on opposite sides of the heat exchange valve 6, and pressure plates 22 press the heat exchange valve 6 horizontally. Simultaneously, first pressure blocks 24 and second pressure blocks 26 form a longitudinal clamping mechanism. This multi-directional, coordinated clamping method applies force to the heat exchange valve 6 from different directions, firmly fixing it in the machining position. This effectively prevents displacement or shaking of the heat exchange valve 6 due to machine tool vibration, cutting force, or other factors during machining, ensuring the stability of the machining process. Furthermore, the use of hydraulic cylinders allows for automated control via a control system, improving operational efficiency. The rational layout of the fixture 2 evenly distributes the forces generated during machining to all parts of the heat exchange valve 6, improving the overall structural reliability of the fixture 2 and extending its service life.

[0029] More specifically, to ensure stable holding, four first cylinders 21 are provided and distributed on opposite sides of the heat exchange valve 6. Furthermore, since the outer shell of the heat exchange valve 6 has different heights on the two opposite sides, the heights of the first cylinders 21 on different sides are also different to better fit and hold the heat exchange valve 6. This allows the first cylinders 21 to better conform to the actual shape of the heat exchange valve 6, ensuring that each cylinder can fully contact the surface of the heat exchange valve 6 and apply effective pressure. Regardless of changes in the height of the heat exchange valve 6's outer shell, a good holding effect can be achieved, improving the adaptability of the clamp 2 to heat exchange valves 6 of different specifications. It should also be noted that the pressure plate 22 is fixedly connected to the output shaft of the first oil cylinder 21. The pressure plate 22 is moved longitudinally by the longitudinal movement of the first oil cylinder 21 to achieve the pressure of the heat exchange valve 6. The pressure plate 22 can also be rotatably connected to the output shaft of the first oil cylinder 21. In order to ensure the stability when the pressure plate 22 is rotatably connected to the first oil cylinder 21, a connecting rod 27 is provided on the first oil cylinder 21. A mounting plate 28 is provided between the connecting rod 27 and the pressure plate 22. The two ends of the mounting plate 28 are rotatably connected to the connecting rod 27 and the pressure plate 22, respectively. The pressure plate 22 is either fixedly connected to the output shaft of the first oil cylinder 21 or rotatably connected to the output shaft of the first oil cylinder 21. The choice is made according to the actual situation. In this embodiment, the pressure plate 22 is fixedly connected to the output shaft of the first oil cylinder 21 on one side and rotatably connected to the output shaft of the first oil cylinder 21 on the other side.

[0030] As described above, when the pressure plate 22 is fixedly connected to the output shaft of the first cylinder 21, the longitudinal movement of the first cylinder 21 can directly and accurately drive the pressure plate 22 to move synchronously longitudinally, thereby achieving the pressing action on the heat exchange valve 6. This connection method is simple to operate and facilitates precise control of the stroke and pressure of the first cylinder 21 through the control system, thus accurately controlling the pressing force and pressing position of the pressure plate 22 on the heat exchange valve 6, meeting the operational requirements of high-precision machining. When the pressure plate 22 is rotatably connected to the output shaft of the first cylinder 21, a connecting rod 27 is set on the first cylinder 21, and a mounting plate 28 is set between the connecting rod 27 and the pressure plate 22, so that both ends of the mounting plate 28 are rotatably connected to the connecting rod 27 and the pressure plate 22 respectively, providing the pressure plate 22 with a certain degree of rotational freedom. When machining the heat exchange valve 6 with a complex shape, the pressure plate 22 can automatically adjust its angle according to the curvature of the surface of the heat exchange valve 6, better fit the surface of the heat exchange valve 6, and achieve tighter and more stable pressing.

[0031] The fixing frame 23 is located between the first oil cylinders 21 on opposite sides, the first pressure block 24 is located above the fixing frame 23 and is used to abut against the heat exchange valve 6, the second oil cylinder 25 is located next to the fixing frame 23, and the second pressure block 26 is connected to the output shaft of the second oil cylinder 25. The first pressure block 24 and the second pressure block 26 form a longitudinal clamping of the heat exchange valve 6. As described above, stable longitudinal clamping can effectively reduce vibrations generated during processing. The second hydraulic cylinder 25 is located next to the fixed frame 23, which also avoids additional space occupation and reduces the overall size of the fixture 2. Specifically, the output shaft of the second pressure block 26 and the second hydraulic cylinder 25 can be fixedly connected or rotatably connected, which is the same as the connection method between the output shaft of the first hydraulic cylinder 21 and the pressure plate 22, and will not be elaborated here.

[0032] See Figure 1 As shown, in this embodiment, the pipe rack 3 includes a column rack 32, a mounting rack 33, and a connecting rack 34. The column rack 32 is vertically mounted on the base 1, specifically on the side of the base 1 away from the heat exchange valve 6. The mounting rack 33 is vertically mounted on the top of the column rack 32, and is parallel to the base 1. The column rack 32 and the mounting rack 33 are connected by nuts. Since a connecting column 5 is placed above the mounting rack 33, a connecting rack 34 is provided between the column rack 32 and the mounting rack 33 to improve the stability of the connection. The top surface of the connecting rack 34 is connected to the bottom surface of the mounting rack 33, and one side of the connecting rack 34 is connected to the side of the column rack 32. The connecting rack 34 can distribute the load borne by the mounting rack 33.

[0033] See Figure 6 and Figure 7 As shown, in this embodiment, multiple first oil passages 51 are provided, and the multiple first oil passages 51 are arranged at intervals along the circumference of the connecting column 5. As described above, multiple first oil passages 51 are provided to ensure that the hydraulic oil does not experience localized pressure concentration during its flow, thus ensuring balanced pipeline pressure.

[0034] See Figure 7 , Figure 8 and Figure 9 As shown, in this embodiment, there are multiple second oil passages 31. The number of second oil passages 31 is the same as the number of first oil passages 51, and the number of second oil passages 31 is the same as the number of first oil passages 51. The second oil passages 31 and the first oil passages 51 are connected in a one-to-one correspondence. As described above, since the number of channels is the same and they correspond one-to-one, the pressure can be transferred and balanced between the channels, reducing the phenomenon of excessive local pressure or too much or too little oil.

[0035] See Figure 10As shown, in this embodiment, the number of third oil passages 11 is the same as that of second oil passages 31, and the third oil passages 11 and second oil passages 31 are connected in a one-to-one correspondence. One end of each third oil passage 11 is connected to either the first oil cylinder 21 or the second oil cylinder 25. Specifically, one end of each third oil passage 11 is connected to either the first oil cylinder 21 or the second oil cylinder 25. In order to ensure the uniformity of the oil in the third oil passages 11, a connecting channel 12 is added to connect at least or all of the third oil passages 11, so that the oil in each third oil passage 11 can flow to each other, thereby achieving automatic pressure balance.

[0036] See Figure 1 As shown, in some embodiments, a support structure 8 is also included, and the base 1 is mounted on the support structure 8 so that an assembly space is reserved between the base 1 and the horizontal plane. The structure described above maintains a certain distance between the base 1 and the horizontal plane, which can effectively prevent water accumulation at the bottom of the equipment and reduce the erosion of the base 1 by moisture.

[0037] Specific implementation steps

[0038] The oil supply pump supplies oil to the oil inlet 42. The oil at the oil inlet 42 passes sequentially through the oil passage gap 43, the first oil passage 51, the second oil passage 31 and the third oil passage 11 and enters the execution unit of the first oil cylinder 21 and the second oil cylinder 25, providing a power source for the operation of the first oil cylinder 21 and the second oil cylinder 25. The heat exchange valve 6 is placed on the placement platform 7, the first oil cylinder 21 is started to drive the pressure plate 22 to press the heat exchange valve 6, and then the second oil cylinder 25 is started to drive the second pressure block 26 to clamp the heat exchange valve 6, so that the subsequent processing operation can be realized.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil passage structure of a heat exchange valve processing jig, characterized by comprising: Includes base (1), clamp (2), pipe rack (3), adapter sleeve (4) and connecting column (5); The clamp (2) is disposed on the base (1) and is used to fix and clamp the heat exchange valve (6). The pipe rack (3) is mounted on the base (1); The inner wall of the adapter sleeve (4) is provided with a thread (41) for connection with the shaft (10). The outer wall of the adapter sleeve (4) is provided with multiple oil inlets (42), and there is an oil passage gap (43) between the thread (41) and the shaft (10) for oil to pass through. One end of the connecting column (5) is connected to the adapter sleeve (4), and the other end is connected to the pipe rack (3); The connecting column (5) is provided with a first oil passage (51), the pipe rack (3) is provided with a second oil passage (31), the base (1) is provided with a third oil passage (11), the oil passage gap (43) is connected to the first oil passage (51), the second oil passage (31) and the third oil passage (11) in sequence, and the oil flowing through the third oil passage (11) is used to drive the clamp (2) to move longitudinally.

2. The oil circuit structure of a heat exchange valve machining fixture according to claim 1, characterized in that, The clamp (2) includes a first hydraulic cylinder (21), a pressure plate (22), a fixing frame (23), a first pressure block (24), a second hydraulic cylinder (25), and a second pressure block (26), wherein, The first oil cylinder (21) is disposed on opposite sides of the heat exchange valve (6); The pressure plate (22) is connected to the output end of the first oil cylinder (21) for pressing the heat exchange valve (6). The fixing frame (23) is disposed between the first oil cylinders (21) on opposite sides; The first pressure block (24) is disposed above the fixed frame (23) and is used to abut against the heat exchange valve (6); The second hydraulic cylinder (25) is located next to the fixed frame (23); The second pressure block (26) is connected to the output shaft of the second oil cylinder (25) via a transmission connection; The first pressure block (24) and the second pressure block (26) form a longitudinal clamping of the heat exchange valve (6).

3. The oil circuit structure of a heat exchange valve machining fixture according to claim 1, characterized in that, The pipe rack (3) includes a column frame (32) and a mounting frame (33), wherein, The column frame (32) is vertically mounted on the base (1), and the mounting bracket (33) is vertically mounted on the top of the column frame (32).

4. The oil circuit structure of a heat exchange valve machining fixture according to claim 3, characterized in that, The pipe rack (3) also includes a connecting rack (34), wherein, The connecting frame (34) is disposed between the column frame (32) and the mounting frame (33).

5. The oil circuit structure of a heat exchange valve machining fixture according to claim 1, characterized in that, The first oil passage (51) is provided with multiple channels, and the multiple first oil passages (51) are arranged at intervals along the circumference of the connecting column (5).

6. The oil circuit structure of a heat exchange valve machining fixture according to claim 5, characterized in that, The number of the second oil passage (31) is the same as that of the first oil passage (51), and the second oil passage (31) and the first oil passage (51) are connected in a one-to-one correspondence.

7. The oil circuit structure of a heat exchange valve machining fixture according to claim 6, characterized in that, The number of the third oil passage (11) is the same as that of the second oil passage (31), and the third oil passage (11) and the second oil passage (31) are connected in a one-to-one correspondence.

8. The oil circuit structure of a heat exchange valve machining fixture according to claim 2, characterized in that, Each of the third oil passages (11) is connected to either the first oil cylinder (21) or the second oil cylinder (25).

9. The oil circuit structure of a heat exchange valve machining fixture according to claim 1, characterized in that, It also includes a placement platform (7), which is located on the base (1) and is used to place the heat exchange valve (6).

10. The oil circuit structure of a heat exchange valve machining fixture according to claim 1, characterized in that, It also includes a support structure (8), on which the base (1) is mounted, so that there is space reserved between the base (1) and the horizontal plane for assembly.

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