Casting pressure testing system and device

Abstract

The invention discloses a casting pressure testing system and device, belongs to the field of casting detection, and solves the problems that an existing casting pressure testing device cannot mark damaged parts in a casting and cannot guarantee safety in the detection process, and the casting pressure testing system comprises a testing bottom plate, a supporting column, an upper top plate, an injection molding assembly and a lifting connecting rod. The protective cover plate can quickly and stably close and shield an opening in the periphery of the equipment, the situation that a detected casting in the equipment is broken due to too large pressure, and fragment sputtering is caused is prevented, so that the safety of the equipment during operation is guaranteed, after the protective cover plate is closed, workers can be effectively prevented from making contact with the casting in the detection process, and the safety of the equipment is improved. The installation of the detection pad is matched with the liquid in the casting, so that the broken parts of the casting can be marked, once the broken parts of a plurality of castings are the same, it is indicated that equipment for casting the casting is misplaced, workers can check errors in time, and the stability and safety of the equipment during operation are guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of casting detection, and in particular relates to a casting pressure testing system and device. Background Art

[0002] A casting is a metal shaped object obtained by various casting methods, that is, the smelted liquid metal is poured into a pre-prepared mold by pouring, injection, suction or other casting methods, and then cooled and polished to obtain an object with a certain shape, size and performance. The casting needs to go through multiple inspection steps, including pressure testing for the sealing of the casting itself. It can accurately detect the sealing and stability of the casting itself, and is now a very commonly used inspection device.

[0003] At present, the pressure test of castings is mainly carried out by changing the internal pressure of the castings, and then observing the pressure of the air pressure detector to judge the sealing of the castings according to the changes in the pressure value. When the casting pressure is tested by the testing device, although the sealing of the castings themselves can be stably detected, the specific location of the casting breakage cannot be detected. In addition, during the detection, the castings may have excessive internal pressure values ​​and structural problems, resulting in breakage, causing flying debris to fly around, affecting the safety of surrounding workers. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In order to solve the problems raised in the above background technology, the present invention adopts the following technical solutions.

[0006] A casting pressure testing system and device, including a test base plate, a support column, an upper top plate, an injection and pressure assembly and a lifting connecting rod, wherein the support columns are symmetrically installed on the surface of the test base plate, the upper top plate is installed on the top of the support column, and the lifting connecting rod is slidably installed in the upper top plate, the injection and pressure assembly for inputting liquid into the casting is fixedly installed on the side of the test base plate, the upper surface of the upper top plate is installed with a limiting mechanism for squeezing and limiting the casting, the side of the upper top plate is installed with a detection mechanism for sealing the side of the support column, the detection mechanism includes a rotating connecting plate and a detection component, the rotating connecting plate is symmetrically rotatably installed on the side of the upper top plate, and the end of the rotating connecting plate is fixedly installed with a detection component for shielding the side of the support column and assisting in detecting the crushing position of the casting.

[0007] As a preferred technical solution of the present invention, the detection mechanism also includes a transmission groove and a transmission assembly. The upper top plate is symmetrically provided with a transmission groove, and a transmission assembly is installed inside the transmission groove to drive the rotating connecting plate to rotate synchronously with the movement of the lifting connecting rod.

[0008] As a preferred technical solution of the present invention, the transmission assembly includes a rotating seat, a first linkage rod, a mating gear, a second linkage rod, a bevel gear group and a transmission gear group. The rotating seat is fixedly installed inside the transmission groove, the first linkage rod is rotatably installed outside the rotating seat, the mating gear is fixedly installed at the end of the first linkage rod, the second linkage rod is rotatably installed inside the transmission groove, the second linkage rod and the first linkage rod end are jointly installed with a bevel gear group, the transmission gear group is installed on the side of the second linkage rod end away from the bevel gear group, and the output end of the transmission gear group is fixedly connected to the rotating connecting plate.

[0009] As a preferred technical solution of the present invention, the transmission gear set consists of a worm wheel, a worm and a transmission rod, the transmission rod is rotatably installed inside the upper top plate, the transmission rod is fixedly connected to the rotating connecting plate, the worm wheel is fixedly installed outside the transmission rod, the worm is installed on the side of the second linkage rod, and the worm is meshingly connected with the worm wheel.

[0010] As a preferred technical solution of the present invention, the detection component includes a protective cover plate, a casting detection pad and an interface detection pad. The protective cover plate is fixedly installed on the side of the rotating connecting plate, the casting detection pad is installed on the surface of the protective cover plate, and the interface detection pad is symmetrically installed on the surface of the protective cover plate at the upper and lower sides of the casting detection pad.

[0011] As a preferred technical solution of the present invention, the limiting mechanism includes a fixed connecting seat, an electric push rod, a sliding sleeve rod, a matching rod and a casting top cover. The fixed connecting seat is installed on the upper surface of the upper top plate by bolts, the electric push rod is fixedly installed on the top of the fixed connecting seat, the output end of the electric push rod passes through the fixed connecting seat and is slidably connected to the upper top plate, the matching rod is fixedly installed at the output end of the electric push rod, the lifting connecting rod is fixedly connected to the matching rod, the sliding sleeve rod is installed on the outside of the matching rod, the casting top cover is installed at the bottom end of the lifting connecting rod, and the casting top cover is in extrusion contact with the upper surface of the casting.

[0012] As a preferred technical solution of the present invention, the limiting mechanism further includes a matching rack, which is symmetrically fixedly mounted on the side of the sliding sleeve rod, and the matching rack is meshingly connected with the matching gear.

[0013] As a preferred technical solution of the present invention, a threaded end is installed at the bottom end of the lifting connecting rod, an engaging groove is opened in the casting top cover, the threaded end is threadedly connected to the engaging groove, and a plug-in tube that fits the top opening of the casting is installed at the bottom end of the casting top cover.

[0014] As a preferred technical solution of the present invention, the injection and pressure assembly includes an input pipe, a bottom receiving seat and a mounting base. The input pipe is fixedly installed on the side of the test base plate. A cavity for conveying liquid is opened inside the test base plate, and the input pipe is connected to the internal cavity of the test base plate. The input pipe is used to input the detection liquid into the test base plate. The mounting base is installed on the upper surface of the test base plate, and the bottom receiving seat is installed on the surface of the mounting base. The bottom receiving seat is connected to the internal cavity of the test base plate.

[0015] As a preferred technical solution of the present invention, the injection molding assembly further includes a pressure detector, which is fixedly mounted on the side of the test base plate and is connected to the internal cavity of the test base plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) In the present invention, by setting up a detection mechanism, the openings around the equipment can be quickly and stably closed and shielded to prevent the castings being detected in the equipment from being broken due to excessive pressure, resulting in splashing of fragments, thereby ensuring the safety of the equipment during operation. After the protective cover is closed, it can effectively prevent the staff from contacting the castings during the detection process. The installation of the detection pad and the cooperation of the liquid inside the casting can mark the broken parts of the casting. Once the broken parts of multiple castings are the same, it indicates that the equipment for casting the castings is misaligned, and the staff can promptly check the errors, thereby ensuring the stability and safety of the equipment during operation.

[0018] (2) In the present invention, by setting up an injection-pressing assembly and a limiting mechanism, liquid and injection pressure can be input into the interior of the casting. In conjunction with a pressure detector, the pressure detection status of the casting itself can be accurately reflected, and the staff can be assisted in recording and using the pressure. The cooperation between the lifting connecting rod and the limiting mechanism provides power for the operation of the detection mechanism, fully utilizing the power of the electric push rod itself, thereby improving the working quality of the equipment itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention.

[0020] Figure 2 It is a three-dimensional diagram of the structure of the casting pressure testing device of the present invention from another angle.

[0021] Figure 3 It is a three-dimensional diagram of the external structure of the upper top plate of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the detection mechanism in the present invention.

[0023] Figure 5 It is a structural schematic diagram of the transmission component in the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the detection component in the present invention.

[0025] Figure 7 It is a structural schematic diagram of the limiting mechanism in the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the injection molding assembly in the present invention.

[0027] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0028] 1. Test base plate; 2. Support column; 3. Upper top plate; 4. Injection pressure assembly; 41. Input pipeline; 42. Bottom receiving seat; 43. Mounting base; 44. Pressure detector; 5. Lifting connecting rod; 6. Limiting mechanism; 61. Fixed connecting seat; 62. Electric push rod; 63. Sliding sleeve rod; 64. Matching rod; 65. Casting top cover; 66. Matching rack; 7. Detection mechanism; 71. Transmission groove; 72. Transmission assembly; 721. Rotating seat; 722. First linkage rod; 723. Matching gear; 724. Second linkage rod; 725. Bevel gear set; 726. Transmission gear set; 73. Rotating connecting plate; 74. Detection component; 741. Protective cover plate; 742. Casting detection pad; 743. Interface detection pad. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0032] Depend on Figure 1 , Figure 2 and Figure 3As shown, it is a structural schematic diagram of the casting pressure testing device in this embodiment, including a test base plate 1, a support column 2, an upper top plate 3, an injection and pressure assembly 4 and a lifting connecting rod 5. The support column 2 is symmetrically installed on the surface of the test base plate 1, the upper top plate 3 is installed on the top of the support column 2, and the lifting connecting rod 5 is slidably installed in the upper top plate 3. The injection and pressure assembly 4 for inputting liquid into the casting is fixedly installed on the side of the test base plate 1, and a limiting mechanism 6 for squeezing and limiting the casting is installed on the upper surface of the upper top plate 3. A detection mechanism 7 for sealing the side of the support column 2 is installed on the side of the upper top plate 3.

[0033] During use, the casting that needs to be tested for sealing is placed on the upper surface of the upper base plate 1, and it is ensured that the bottom opening of the casting is aligned with the delivery port in the injection-pressing assembly 4. Then, the position of the casting is fixed by the operation of the limiting mechanism 6 to facilitate subsequent injection-pressing. When the limiting mechanism 6 is in operation, the detection mechanism 7 will work synchronously to close the side of the support column 2 to ensure the safety of the overall detection. The detection mechanism 7 itself can display the broken position of the casting. Once the broken positions of multiple castings are consistent, it indicates that there is a problem with the casting equipment, which is convenient for timely discovery of the problem and subsequent rapid detection of the equipment. By using the injection-pressing assembly 4, the interior of the casting is filled with liquid, and then the interior of the casting is pressurized. By running the injection-pressing assembly 4, the sealing of the casting itself is accurately detected to complete the casting pressure test.

[0034] By the attached Figure 4 As shown, it is a structural schematic diagram of the detection mechanism 7 in this embodiment, the detection mechanism 7 includes a transmission groove 71, a transmission assembly 72, a rotating connecting plate 73 and a detection component 74, the rotating connecting plate 73 is symmetrically rotatably installed on the side of the upper top plate 3, and the end of the rotating connecting plate 73 is fixedly installed with a detection component 74 for shielding the side of the support column 2 and assisting in detecting the crushing position of the casting, the upper top plate 3 is symmetrically provided with a transmission groove 71, and the transmission groove 71 is installed with a transmission assembly 72 that drives the rotating connecting plate 73 to rotate synchronously with the movement of the lifting connecting rod 5.

[0035] During use, the operation of the limiting mechanism 6 causes the transmission assembly 72 to work inside the transmission groove 71, driving the rotating connecting plate 73 to operate synchronously, adjusting the angle of the detection component 74 itself, and converting the detection component 74 originally parallel to the upper top plate 3 to be perpendicular to the upper top plate 3, closing and shielding the side of the support column 2, which can effectively prevent the casting from being broken due to injection pressure, resulting in splashing of fragments, thereby improving the safety of equipment operation. Through the use of the detection component 74, the part of the casting where the liquid is splashed can be detected, which is convenient for the staff to respond and record the damaged parts of the casting in time. Once the broken positions of multiple castings are the same, it indicates that there is an error in the casting equipment, which can timely reflect the quality of the casting processing equipment.

[0036] By the attached Figure 5 As shown, it is a structural schematic diagram of the transmission component 72 in this embodiment, the transmission component 72 includes a rotating seat 721, a first linkage rod 722, a matching gear 723, a second linkage rod 724, a bevel gear set 725 and a transmission gear set 726, the rotating seat 721 is fixedly installed inside the transmission groove 71, the first linkage rod 722 is rotatably installed outside the rotating seat 721, the matching gear 723 is fixedly installed at the end of the first linkage rod 722, the second linkage rod 724 is rotatably installed inside the transmission groove 71, the second linkage rod 724 is connected to the end of the first linkage rod 722 through the bevel gear set 725, the transmission gear set 726 is installed on the side of the end of the second linkage rod 724 away from the bevel gear set 725, and the output end of the transmission gear set 726 is fixedly connected to the rotating connecting plate 73.

[0037] During use, the operation of the limiting mechanism 6 causes the matching gear 723 to drive the first linkage rod 722 to rotate, and the conduction and cooperation of the bevel gear set 725 drive the second linkage rod 724 to rotate inside the transmission groove 71, providing power for the rotation of the transmission gear set 726. Afterwards, driven by the transmission gear set 726, the position and angle of the rotating connecting plate 73 and the detection component 74 are adjusted, and the thrust of the limiting mechanism 6 itself during operation is fully utilized to provide power for the operation of the detection component 74. There is no need to install other drive components, making the use of the equipment itself more efficient and stable.

[0038] By the attached Figure 5 As shown, it is a structural schematic diagram of the transmission assembly 72 in this embodiment, the transmission gear set 726 consists of a worm wheel, a worm and a transmission rod, the transmission rod is rotatably installed inside the upper top plate 3, the transmission rod is fixedly connected to the rotating connecting plate 73, the worm wheel is fixedly installed outside the transmission rod, the worm is installed on the side of the second linkage rod 724, and the worm is meshingly connected with the worm wheel.

[0039] During use, the rotation of the second linkage rod 724 drives the worm to rotate, and the meshing of the worm and the worm wheel is utilized to enable the transmission rod to drive the rotating connecting plate 73 to adjust the angle. The irreversibility of the meshing of the worm wheel and the worm is fully utilized during use to prevent the detection component 74 from tilting due to the impact of the broken casting, thereby ensuring the stability and safety of the detection component 74 during use.

[0040] By the attached Figure 6 As shown, it is a structural schematic diagram of the detection component 74 in this embodiment, and the detection component 74 includes a protective cover 741, a casting detection pad 742 and an interface detection pad 743. The protective cover 741 is fixedly mounted on the side of the rotating connecting plate 73, the casting detection pad 742 is mounted on the surface of the protective cover 741, and the interface detection pad 743 is symmetrically mounted on the surface of the protective cover 741 and located on the upper and lower sides of the casting detection pad 742.

[0041] During use, the protective cover 741 is used to shield and seal the space on the side of the support column 2, ensuring the safety and stability of the internal components during operation of the equipment. When the detection component 74 is closed, it effectively prevents the staff from contacting the casting during the operation of the equipment, further enhancing the rationality and safety of the equipment during operation. When the casting is damaged and the liquid inside the casting splashes out, this type of liquid is sprayed onto the surface of the casting detection pad 742 due to the internal pressure of the casting. The casting detection pad 742 itself is made of cloth, and the liquid injected into the injection molding assembly 4 has a pigment, and its color is different from the color of the cloth of the casting detection pad 742, so that the liquid splashed on the surface of the casting detection pad 742 is very clear. At this time By observing the liquid splashing area on the surface of the casting detection pad 742, the staff can quickly identify the damaged part of the casting, which is convenient for subsequent recording and marking of each damaged part of the casting. The casting detection pad 742 is installed on the side of the protective cover 741 by bonding, which is convenient for subsequent rapid replacement. The setting of the interface detection pad 743 can check the sealing performance of the bottom end of the limiting mechanism 6 and the surface of the upper top plate 3 when they are matched with the casting. The interface detection pad 743 and the casting detection pad 742 are made of the same material and have the same installation method. The position of the leakage port is detected according to the position of the water stain on the surface to prevent the final detection data from being deviated due to the gap when the casting contacts the upper top plate 3 and the limiting mechanism 6, thereby improving the operation stability and work quality of the equipment itself.

[0042] By the attached Figure 7 As shown, it is a structural schematic diagram of the limiting mechanism 6 in this embodiment, the limiting mechanism 6 includes a fixed connecting seat 61, an electric push rod 62, a sliding sleeve rod 63, a matching rod 64 and a casting top cover 65, the fixed connecting seat 61 is installed on the upper surface of the upper top plate 3 by bolts, the electric push rod 62 is fixedly installed on the top of the fixed connecting seat 61, the output end of the electric push rod 62 passes through the fixed connecting seat 61 and is slidably connected to the upper top plate 3, the matching rod 64 is fixedly installed at the output end of the electric push rod 62, the lifting connecting rod 5 is fixedly connected to the matching rod 64, the sliding sleeve rod 63 is installed on the outside of the matching rod 64, the casting top cover 65 is installed at the bottom end of the lifting connecting rod 5, and the casting top cover 65 is in extrusion contact with the upper surface of the casting.

[0043] During use, the electric push rod 62 is started, so that the output end of the electric push rod 62 pushes the position of the matching rod 64, thereby changing the overall position of the lifting link 5. Then, with the cooperation of the lifting link 5 and the casting top cover 65, the surface of the casting is pushed and squeezed, so that the casting is stably installed between the upper top plate 3 and the limiting mechanism 6, which is convenient for the subsequent input of the internal liquid of the lifting link 5 into the casting and the injection pressure into the casting.

[0044] By the attached Figure 7 As shown, it is a schematic diagram of the structure of the limiting mechanism 6 in this embodiment. The limiting mechanism 6 also includes a matching rack 66, which is symmetrically fixedly installed on the side of the sliding sleeve rod 63, and the matching rack 66 is meshed and connected with the matching gear 723.

[0045] During use, the installation of the mating rack 66 provides power for the operation of the internal components of the transmission assembly 72. When the mating rack 66 moves synchronously with the sliding sleeve 63, the mating rack 66 engages with the mating gear 723, driving the mating gear 723 to rotate, making full use of the thrust of the electric push rod 62 itself, and ensuring the stability of the equipment during operation.

[0046] By the attached Figure 7 As shown, it is a schematic diagram of the structure of the limiting mechanism 6 in this embodiment, the bottom end of the lifting connecting rod 5 is installed with a threaded end, an engaging groove is opened in the casting top cover 65, the threaded end is threadedly connected with the engaging groove, and the bottom end of the casting top cover 65 is installed with a plug-in tube that fits the top opening of the casting.

[0047] During use, the corresponding casting top cover 65 is selected according to the specifications and structure of the opening at the top of the casting, and then the corresponding casting top cover 65 is installed on the surface of the lifting connecting rod 5 through the threaded end, so that the subsequent matching rod 63 can drive the casting top cover 65 to move up and down, squeeze and reinforce the position of the casting, and after the limiting mechanism 6 is removed as a whole from the surface of the upper top plate 3, the matching rack 66 and the casting top cover 65 can be quickly replaced by rotating the casting top cover 65, which is convenient for the equipment to fix castings of different heights, and in the limiting process, the replaced matching rack 66 can still stably drive the detection mechanism 7 to close and operate.

[0048] By the attached Figure 8 As shown, it is a structural schematic diagram of the injection and pressure assembly 4 in this embodiment, the injection and pressure assembly 4 includes an input pipe 41, a bottom receiving seat 42 and a mounting base 43, the input pipe 41 is fixedly installed on the side of the test base plate 1, a cavity for conveying liquid is opened inside the test base plate 1, and the input pipe 41 is connected to the internal cavity of the test base plate 1, the input pipe 41 is for inputting the detection liquid into the test base plate 1, the mounting base 43 is installed on the upper surface of the test base plate 1, the bottom receiving seat 42 is installed on the surface of the mounting base 43, and the bottom receiving seat 42 is connected to the internal cavity of the test base plate 1.

[0049] During use, the liquid used for subsequent testing is input into the internal cavity of the test base plate 1 through the use of the input pipe 41, and then the liquid is injected into the interior of the casting through the use of the bottom receiving seat 42, and the structure of the bottom receiving seat 42 itself matches the bottom opening of the casting to ensure the sealing of the casting and the mounting base 43 when they are fitted.

[0050] By the attached Figure 8 As shown, it is a structural diagram of the injection-pressing assembly 4 in this embodiment. The injection-pressing assembly 4 also includes a pressure detector 44, which is fixedly mounted on the side of the test base plate 1, and the pressure detector 44 is connected to the internal cavity of the test base plate 1.

[0051] During use, by installing the pressure detector 44, the pressure input by the input pipe 41 can be observed in real time. The staff can observe the changes in the numerical value of the pressure detector 44 itself to quickly judge the sealing of the casting itself and the pressure test results, which simplifies the overall detection process and improves the stability and work efficiency of the equipment itself during operation.

[0052] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A casting pressure testing device, comprising a testing base plate (1), a support column (2), an upper top plate (3), an injection and pressure assembly (4) and a lifting connecting rod (5), wherein the testing base plate (1) is symmetrically mounted with the support column (2), the upper top plate (3) is mounted on the top of the support column (2), the lifting connecting rod (5) is slidably mounted in the upper top plate (3), and the injection and pressure assembly (4) for inputting liquid into the casting is fixedly mounted on the side of the testing base plate (1), characterized in that: The upper surface of the upper top plate (3) is provided with a limiting mechanism (6) for squeezing and limiting the casting, and the side of the upper top plate (3) is provided with a detection mechanism (7) for sealing the side of the support column (2). The detection mechanism (7) comprises a rotating connecting plate (73) and a detection component (74). The rotating connecting plate (73) is symmetrically rotatably installed on the side of the upper top plate (3), and the end of the rotating connecting plate (73) is fixedly provided with a detection component (74) for shielding the side of the support column (2) and assisting in detecting the broken position of the casting.

2. The casting pressure testing device according to claim 1, characterized in that: The detection mechanism (7) further comprises a transmission groove (71) and a transmission assembly (72). The transmission groove (71) is symmetrically provided in the upper top plate (3). The transmission groove (71) is provided with a transmission assembly (72) which drives the rotating connecting plate (73) to rotate synchronously with the movement of the lifting connecting rod (5).

3. The casting pressure testing device according to claim 2, characterized in that: The transmission assembly (72) comprises a rotating seat (721), a first linkage rod (722), a matching gear (723), a second linkage rod (724), a bevel gear set (725) and a transmission gear set (726); the rotating seat (721) is fixedly mounted inside the transmission groove (71); the first linkage rod (722) is rotatably mounted outside the rotating seat (721); the matching gear (723) is fixedly mounted at the end of the first linkage rod (722); the second linkage rod (724) is rotatably mounted inside the transmission groove (71); the second linkage rod (724) and the first linkage rod (722) are jointly mounted with a bevel gear set (725); the transmission gear set (726) is mounted on a side of the end of the second linkage rod (724) away from the bevel gear set (725); and the output end of the transmission gear set (726) is fixedly connected to the rotating connecting plate (73).

4. The casting pressure testing device according to claim 3, characterized in that: The transmission gear set (726) is composed of a worm wheel, a worm and a transmission rod. The transmission rod is rotatably mounted inside the upper top plate (3). The transmission rod is fixedly connected to the rotating connecting plate (73). The worm wheel is fixedly mounted outside the transmission rod. The worm is mounted on the side of the second linkage rod (724). The worm is meshingly connected to the worm wheel.

5. The casting pressure testing device according to claim 4, characterized in that: The detection component (74) comprises a protective cover plate (741), a casting detection pad (742) and an interface detection pad (743); the protective cover plate (741) is fixedly mounted on the side of the rotating connecting plate (73); the casting detection pad (742) is mounted on the surface of the protective cover plate (741); and the interface detection pad (743) is symmetrically mounted on the surface of the protective cover plate (741) and located at the upper and lower sides of the casting detection pad (742).

6. The casting pressure testing device according to claim 5, characterized in that: The limiting mechanism (6) comprises a fixed connection seat (61), an electric push rod (62), a sliding sleeve rod (63), a matching rod (64) and a casting top cover (65); the fixed connection seat (61) is mounted on the upper surface of the upper top plate (3) by means of bolts; the electric push rod (62) is fixedly mounted on the top of the fixed connection seat (61); the output end of the electric push rod (62) passes through the fixed connection seat (61) and is slidably connected to the upper top plate (3); the matching rod (64) is fixedly mounted on the output end of the electric push rod (62); the lifting connecting rod (5) is fixedly connected to the matching rod (64); the sliding sleeve rod (63) is mounted on the outside of the matching rod (64); the casting top cover (65) is mounted on the bottom end of the lifting connecting rod (5); and the casting top cover (65) is in extrusion contact with the upper surface of the casting.

7. The casting pressure testing device according to claim 6, characterized in that: The limiting mechanism (6) also includes a matching rack (66), which is symmetrically fixedly mounted on the side of the sliding sleeve rod (63), and the matching rack (66) is meshingly connected with the matching gear (723).

8. The casting pressure testing system and device according to claim 7, characterized in that: The bottom end of the lifting connecting rod (5) is provided with a threaded end, an engaging groove is provided in the casting top cover (65), the threaded end is threadedly connected to the engaging groove, and the bottom end of the casting top cover (65) is provided with a plug-in tube that fits the top opening of the casting.

9. The casting pressure testing device according to claim 1, characterized in that: The injection and pressing assembly (4) comprises an input pipe (41), a bottom receiving seat (42) and a mounting base (43); the input pipe (41) is fixedly mounted on the side of the test base plate (1); a cavity for conveying liquid is provided inside the test base plate (1); the input pipe (41) is connected to the cavity inside the test base plate (1); the input pipe (41) is used to input detection liquid into the test base plate (1); the mounting base (43) is mounted on the upper surface of the test base plate (1); the bottom receiving seat (42) is mounted on the surface of the mounting base (43); and the bottom receiving seat (42) is connected to the cavity inside the test base plate (1).

10. The casting pressure testing device according to claim 9, characterized in that: The injection molding assembly (4) further comprises a pressure detector (44), wherein the pressure detector (44) is fixedly mounted on the side of the test base plate (1), and the pressure detector (44) is connected to the internal cavity of the test base plate (1).

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