Deep hole sealing performance test platform

Abstract

The utility model discloses a deep hole sealing performance test platform, which relates to the technical field of sealing performance test, can solve the technical problem of low sealing performance detection efficiency, and is characterized in that at least one plugging tool is arranged at the top of a pressure test base, and a water tank and a water pump are arranged below the pressure test base; a plugging head is arranged at one end of each plugging tool, a tool hole channel is formed in at least one plugging tool, and an outlet of each tool hole channel is located in the middle of the corresponding plugging head. A liquid outlet of the water tank is connected with a liquid inlet of the water pump through a pipeline, a liquid outlet of the water pump is connected with a liquid inlet of the first valve and a liquid inlet of the second valve through a pipeline and a three-way connector respectively, a liquid outlet of the first valve is connected with a liquid inlet of the liquid injection pipe through a pipeline, and a pressure gauge is arranged between the liquid outlet of the liquid injection pipe and the first valve. A liquid outlet of the liquid injection pipe is connected with an inlet of the tool hole channel, and a liquid outlet of the second valve is connected with a liquid inlet of the water tank through a pipeline. The deep hole sealing detection device can be used for deep hole sealing detection.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing test, in particular to a deep hole sealing test platform. Background Art

[0002] During the machining of the oil channel holes in the workpiece, the long oil channel is often machined in half at both ends. Considering the influence of many factors such as machining accuracy, equipment accuracy, and casting stability, the oil channel holes after machining need to be tested for sealing. The traditional testing method is mainly to design a sealing steel plate, drill holes and process threaded holes in the steel plate corresponding to the oil channel holes in the workpiece, install quick connectors, and groove and install sealing rings on the contact side of the steel plate and the workpiece for sealing. During the test, the steel plate is pressed with fastening screws to seal the two end faces of the workpiece. After the quick connector is connected to the air source, the workpiece is hoisted with the help of the hoisting hole of the workpiece and immersed in the water tank to observe the leakage. After the test is passed, the workpiece needs to be lifted out of the water tank, the air source and fastening screws removed, the sealing steel plate removed, and the accumulated water in the workpiece cleaned.

[0003] Traditional testing methods have many problems: to complete the sealing test of a workpiece, a series of tedious operations need to be carried out in sequence, including installation of sealing fixtures, inflation of oil channel holes, lifting the workpiece and immersing it in water, visual inspection, lifting the workpiece and removing the sealing fixtures, and cleaning the workpiece. The entire process is extremely time-consuming; each test requires repeated installation and removal of sealing steel plates and screws, which consumes a lot of time and seriously affects production efficiency; the tedious operating procedures require operators to frequently perform high-intensity operations, which is extremely labor-intensive and is not conducive to long-term work of personnel and sustainable development of production; immersion testing will cause a large amount of water to be poured into other pore spaces outside the oil holes of the workpiece. The residual water is difficult to clean, which not only increases the extra workload, but may also affect the subsequent performance and life of the workpiece due to incomplete cleaning.

[0004] To address the shortcomings of traditional testing methods, Chinese patent document CN204269302U discloses a tractor transmission oil channel hole leak detection device. This solution utilizes a combination of a sealing panel assembly, a threaded hole blocking block assembly, and an internal expansion plug assembly to seal the oil channel holes. This device is connected to a leak tester via a compressed air line assembly, and a reversing valve controls the air flow to achieve leak detection. The key to this approach is the design of specialized sealing assemblies for different hole types (plain holes, threaded holes, and internal cross holes). For example, the internal expansion plug assembly uses a cylinder to drive an internal expansion rubber to expand and seal the internal cross hole. Limitations of this solution include: the internal expansion plug requires insertion into the workpiece, making it difficult to effectively seal deep holes, especially when the length exceeds the cylinder stroke. Separate sealing assemblies must be designed for different hole types, resulting in high conversion costs. The installation process relies on screws, making it cumbersome and inefficient. Furthermore, the use of pneumatic pressure testing requires a complex air control system, which carries the risk of gas leakage and affects detection accuracy.

[0005] To address the shortcomings of traditional testing methods, Chinese patent document CN213239330U discloses a device for detecting oil channel leaks in tractor transmissions. This solution optimizes the air pipe layout, achieving S-shaped storage of the air pipe by installing a block and spring structure inside the housing, reducing ground space. The limitations of this solution are: it is still based on the principle of air pressure detection and does not address the issues of universality and deep-hole adaptability of the sealing component; it does not improve the sealing method and still relies on traditional screws to fix the sealing panel, which cannot avoid the time-consuming and labor-intensive manual installation; it lacks specificity for deep-hole sealing testing and does not include pressure testing solutions for liquid media, limiting the detection scenarios. Utility Model Content

[0006] In order to solve one or more technical problems in the prior art, the utility model provides a deep hole sealing test platform.

[0007] A deep hole sealing test platform includes a base support, on which a pressure test base is provided:

[0008] At least one sealing fixture is provided on the top of the pressure test base, and a water tank and a water pump are provided below the pressure test base;

[0009] A plugging head is provided at one end of the plugging tool, and a tool channel is provided inside at least one of the plugging tools, and the outlet of the tool channel is located in the middle of the plugging head;

[0010] The liquid outlet of the water tank is connected to the liquid inlet of the water pump through a pipeline, the liquid outlet of the water pump is connected to the liquid inlet of the first valve and the liquid inlet of the second valve through a pipeline and a three-way joint respectively, the liquid outlet of the first valve is connected to the liquid inlet of the injection pipe through a pipeline, a pressure gauge is provided between the liquid outlet of the injection pipe and the first valve, the liquid outlet of the injection pipe is connected to the inlet of the tooling channel, and the liquid outlet of the second valve is connected to the liquid inlet of the water tank through a pipeline.

[0011] Preferably, a cylinder is further provided on the top of the pressure test base, and a telescopic rod of the cylinder is threadedly connected to the sealing fixture.

[0012] Preferably, a guide groove is provided on the top of the pressure test base, and the cylinder is adjustably connected to the guide groove through the cylinder base.

[0013] Preferably, a guide rod is provided on the cylinder base, a through hole is provided at one end of the blocking tool, and the guide rod is slidably connected to the through hole.

[0014] Preferably, a sealing ring groove is provided on the sealing head, and a sealing ring is embedded in the sealing ring groove.

[0015] Preferably, the blocking tool comprises a first blocking tool and a second blocking tool that are arranged opposite to each other.

[0016] Preferably, a positioning pin is connected to the top of the pressure test base.

[0017] Preferably, a pad is connected to the top of the pressure test base.

[0018] Preferably, a plurality of threaded mounting holes are provided on the top of the pressure test base, and the positioning pins and / or the pads are connected to the threaded mounting holes via bolts.

[0019] Preferably, the first valve is connected to a first switch, the second valve is connected to a second switch, and the cylinder is connected to a reversing valve;

[0020] The first switch, the second switch and / or the reversing valve are arranged on the top of the pressure test base.

[0021] Beneficial effects of the utility model:

[0022] This new design uses a plugging fixture and a water pump to inject liquid into the oil channel. A tooling channel is located within the plugging fixture, and the outlet is positioned in the center of the plugging head. This design allows the test liquid to be injected directly and accurately into the deep hole to be tested. Compared to traditional testing methods, this avoids complex piping connections and liquid dispersion, ensuring a stable test pressure that is concentrated in the deep hole. This improves the accuracy and reliability of seal testing, providing the hardware foundation for accurately determining deep hole sealing performance, thereby shortening testing time and improving test efficiency.

[0023] This new design eliminates the need to immerse the entire workpiece in liquid, eliminating the tedious steps of hoisting the workpiece, immersing it in water, and cleaning out the accumulated water. This effectively reduces the time required to clean the waterways and internal cavities after the pressure test, significantly shortening the test cycle. Furthermore, the water pump, valve, injection pipe, and plugging fixture work together to allow liquid to be directly injected into the deep hole for leak testing. This makes the entire process more streamlined and efficient, reducing multiple complex steps compared to existing technologies and significantly improving test efficiency.

[0024] This new model uses a pneumatic cylinder in conjunction with a reversing valve to drive the plugging fixture, achieving automated operation. Operators no longer need to perform the arduous task of manually installing and removing plugging plates and screws. Instead, they simply control the movement of the pneumatic cylinder to move the plugging fixture and securely fit the plugging head to the deep hole. This reduces operator labor intensity, makes testing operations simpler and easier, and is beneficial to long-term operation and sustainable production.

[0025] Compared with the internal expansion plugs in the prior art, the plugging head of the present invention does not need to be inserted into the workpiece for complex operations and is not limited by the length of the deep hole. It can also achieve fast, accurate and stable plugging for workpieces with complex structures such as long deep holes. The internal expansion plugs in the prior art often need to be inserted into the workpiece to a certain depth to achieve plugging. When the deep hole length exceeds the cylinder stroke, it is difficult to achieve effective plugging. The plugging head of the present application is located at one end of the plugging tool and acts directly on the deep hole orifice. The plugging operation can be completed by driving the plugging tool with the cylinder to move the plugging head, which is more applicable to deep holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0027] Figure 1 1 is an overall schematic diagram of a deep hole sealing test platform according to an embodiment of the present utility model;

[0028] Figure 2 is located in Figure 1 Schematic diagram of the connection between the plugging fixture on the left and the pressure test base;

[0029] Figure 3 is located in Figure 1 Schematic diagram of the connection between the plugging fixture and the pressure test base in the middle right;

[0030] Figure 4 This is a schematic diagram of the connection between the water tank, water pump and injection pipe according to an embodiment of the utility model;

[0031] In the figure: 1. Base bracket; 2. Pressure test base; 21. Guide groove; 22. Locating pin; 23. Spacer; 24. Threaded mounting hole; 3. Sealing tool; 31. Sealing head; 311. Sealing ring groove; 32. Tool channel; 301. First sealing tool; 302. Second sealing tool; 41. Water tank; 42. Water pump; 43. T-joint; 44. First valve; 441. First switch; 45. Second valve; 451. Second switch; 46. Liquid filling pipe; 47. Pressure gauge; 51. Cylinder; 511. Telescopic rod; 512. Reversing valve; 52. Cylinder base; 521. Guide rod. DETAILED DESCRIPTION

[0032] With the continuous development of the business and the continuous increase in product output, how to reduce labor intensity and improve testing efficiency has become a key demand for the development of the industry. The deep hole sealing test platform technical solution proposed in this utility model can solve these existing technical problems and can realize efficient, simple and low-cost oil channel hole sealing testing. It can also solve the problem that after the oil channel holes are processed, the oil channel hole sealing tooling at both ends of various models of workpieces has many types, which is complicated, time-consuming and labor-intensive, and inefficient.

[0033] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is expected that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0034] In the description of this application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and do not require that this application must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application. The terms "connected", "connected", and "set" used in this application should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Example 1:

[0036] like Figures 1 to 4 As shown, a deep hole sealing test platform includes a base bracket 1, on which a pressure test base 2 is provided:

[0037] At least one sealing fixture 3 is provided on the top of the pressure test base 2, and a water tank 41 and a water pump 42 are provided below the pressure test base 2;

[0038] A plugging head 31 is provided at one end of the plugging tool 3, and a tool channel 32 is provided inside at least one plugging tool 3, and the outlet of the tool channel 32 is located in the middle of the plugging head 31;

[0039] The liquid outlet of the water tank 41 is connected to the liquid inlet of the water pump 42 through a pipeline, the liquid outlet of the water pump 42 is connected to the liquid inlet of the first valve 44 and the liquid inlet of the second valve 45 through a pipeline and a three-way joint 43 respectively, the liquid outlet of the first valve 44 is connected to the liquid inlet of the injection pipe 46 through a pipeline, a pressure gauge 47 is provided between the liquid outlet of the injection pipe 46 and the first valve 44, the liquid outlet of the injection pipe 46 is connected to the inlet of the tooling channel 32, and the liquid outlet of the second valve 45 is connected to the liquid inlet of the water tank 41 through a pipeline.

[0040] In practice, the design of a tooling channel 32 within the sealing tool 3 and its outlet located in the center of the sealing head 31 allows the test liquid to be directly and accurately injected into the deep hole to be tested. Compared with traditional testing methods, this avoids complex piping connections and liquid dispersion, ensures stable and concentrated test pressure in the deep hole, improves the accuracy and reliability of sealing tests, and provides a hardware foundation for accurately determining deep hole sealing performance.

[0041] The injection tube 46 can be made of a high-pressure rubber hose, which is convenient for flexible connection with the inlet of the tooling channel 32. When specifically connected, the injection tube 46 and the inlet of the tooling channel 32 can be connected by threads. For example, matching internal and external threads are processed at the outlet of the injection tube 46 and the inlet of the tooling channel 32, and the connection is achieved by rotating and tightening. This connection method has a simple structure and a firm connection. It can effectively prevent the leakage of the test liquid, ensure the sealing of the test process, ensure pressure stability, and thus improve the accuracy of the test results. In addition, the injection tube 46 and the inlet of the tooling channel 32 can also be connected by a clamp. For example, the tooling channel 32 has a protrusion protruding outward. When connected, the injection tube 46 is sleeved on the protrusion of the tooling channel 32 and then fastened by a clamp.

[0042] The base bracket 1 can be made of metal, such as steel, to ensure sufficient strength and stability, and to be able to bear the weight of the pressure test base 2 and other components. The pressure test base 2 is arranged on the base bracket 1, and at least one sealing fixture 3 is installed on the top thereof. These sealing fixtures 3 are used to seal deep holes, and the number can be flexibly set according to the test requirements. A water tank 41 and a water pump 42 are provided under the pressure test base 2. The water tank 41 is used to store the test liquid, and the water pump 42 is responsible for transporting the liquid in the water tank 41 to the deep hole. There is a sealing head 31 at one end of the sealing fixture 3, and the sealing head 31 is in direct contact with the deep hole to realize the sealing function. At least one sealing fixture 3 is provided with a tooling channel 32 inside, and the outlet of the tooling channel 32 is located in the middle of the sealing head 31. This design enables the test liquid to be accurately injected into the deep hole to be tested area. The liquid outlet of the water tank 41 is connected to the liquid inlet of the water pump 42 via a pipeline, forming a liquid delivery channel; the liquid outlet of the water pump 42 is connected to the liquid inlets of the first valve 44 and the second valve 45 respectively via a pipeline and a three-way joint 43, and the three-way joint 43 acts as a diversion. The liquid outlet of the first valve 44 is connected to the liquid inlet of the injection pipe 46, which is used to transport liquid to the tooling channel 32 of the sealing tool 3. A pressure gauge 47 is installed between the liquid outlet of the injection pipe 46 and the first valve 44 for real-time monitoring of the liquid pressure. The liquid outlet of the second valve 45 is connected to the liquid inlet of the water tank 41 via a pipeline. When the second valve 45 is opened, the liquid can flow back to the water tank 41, realizing liquid circulation.

[0043] Before testing, make sure that there is sufficient test liquid in the water tank 41. Start the water pump 42. Under the action of the water pump 42, the liquid in the water tank 41 flows through the pipeline through the three-way joint 43 to the first valve 44 and the second valve 45. Close the second valve 45, open the first valve 44, and the liquid enters the injection pipe 46. At this time, the pressure gauge 47 starts to monitor the liquid pressure. The liquid enters the tooling channel 32 of the sealing tool 3 through the injection pipe 46, and is then injected into the deep hole from the middle outlet of the sealing head 31. Close the first valve 44, and judge the sealing of the deep hole according to the changes in the reading of the pressure gauge 47. If the pressure is stable, it indicates that the sealing is good; if the pressure drops, it indicates that there is a leak. After the test is completed, open the first valve 44 and the second valve 45, and the remaining liquid flows back to the water tank 41.

[0044] This testing platform utilizes a brand-new structural design, utilizing components such as a water pump 42, valves (first valve 44, second valve 45), a liquid injection tube 46, and a sealing fixture 3 to directly inject liquid into deep holes for leak testing. This eliminates the need to fully immerse the workpiece in liquid, thus avoiding cumbersome installation, disassembly, and cleaning procedures, significantly improving testing efficiency and reducing labor intensity. Furthermore, the platform's simple structure and high versatility make it suitable for deep-hole leak testing on a wide variety of workpieces, overcoming the high tooling costs associated with traditional testing methods due to the wide range of workpiece structures.

[0045] Existing internal expansion plugs primarily use cylinders to drive the expansion of internal expansion rubber to seal internal cross-holes. Their primary function is to provide a plugging function, without inherently providing a channel for liquid or gas transport. However, the core feature of the plug 31 of the present invention, compared to existing internal expansion plugs, lies in its connection with a tooling channel 32 within the plugging fixture 3. The outlet of this tooling channel 32 is located in the middle of the plug 31, thereby enabling active liquid or gas transport.

[0046] Example 2:

[0047] like Figure 2 、 3 As shown, further, a cylinder 51 is provided on the top of the pressure test base 2 , and a telescopic rod 511 of the cylinder 51 is threadedly connected to the blocking tool 3 .

[0048] In practice, an internally threaded hole can be provided at the end of the telescopic rod 511, and a through-hole can be provided at a corresponding position on the blocking fixture 3. During installation, a bolt can be passed through the through-hole of the blocking fixture 3 and screwed into the blind threaded hole at the end of the telescopic rod 511. By tightening the bolt, the blocking fixture 3 and the telescopic rod 511 are firmly fixed. Alternatively, the end of the telescopic rod 511 can be provided with an externally threaded rod, and a through-hole can be provided at a corresponding position on the blocking fixture 3. During installation, the externally threaded rod at the end of the telescopic rod 511 can be passed through the through-hole of the blocking fixture 3, and then the nut can be tightened to connect the two.

[0049] When a deep hole needs to be sealed, the cylinder 51 is activated, extending the cylinder's telescopic rod 511. Since the telescopic rod 511 is threadedly connected to the sealing fixture 3, the sealing fixture 3 moves as the telescopic rod 511 extends, until the sealing head 31 is firmly seated against the deep hole, completing the sealing operation. After the test is complete, the cylinder's telescopic rod 511 is retracted, separating the sealing fixture 3 from the deep hole and releasing it. This fully automates the entire process, reducing manual steps.

[0050] In traditional testing methods, the blocking and loosening operations rely on manual installation and removal of blocking steel plates, which is cumbersome and time-consuming. The present invention uses a cylinder 51 to drive the blocking tool 3, which can achieve fast and automatic blocking and loosening, not only improving testing efficiency but also reducing labor intensity.

[0051] Example 3:

[0052] like Figure 2 、 3 As shown, further, a guide groove 21 is provided on the top of the pressure test base 2, and the cylinder 51 is adjustably connected to the guide groove 21 through the cylinder base 52.

[0053] In specific implementation, the guide groove 21 can be designed as a long waist-shaped slot hole.

[0054] The installation method of the cylinder in traditional test platforms is relatively fixed, making it difficult to flexibly adjust according to the size of different workpieces. However, the present invention provides a solution for the flexible adjustment of the position of the cylinder 51 by providing a guide groove 21 on the top of the pressure test base 2 and cooperating the cylinder base 52 with the guide groove 21 to achieve an adjustable connection. This design fully considers the differences in size of different types of workpieces, especially the requirements of the test platform for different workpiece lengths. Through the cooperation of the guide groove 21 and the cylinder base 52, the position of the cylinder 51 can be flexibly adjusted according to the length of the workpiece, realizing the wide adaptability of the test platform to various types of workpieces, without the need to equip each type of workpiece with a dedicated test platform or perform complex modifications.

[0055] By pushing the cylinder base 52 to move in the guide groove 21, the position of the cylinder 51 can be adjusted according to the length of different workpieces, so that the test platform can adapt to various types of workpieces. This means that companies do not need to purchase or customize test equipment for workpieces of different sizes, which can reduce equipment procurement costs and management costs, and can improve the efficiency and application range of the equipment. By allowing the cylinder 51 to operate within its effective stroke, the cylinder 51 can provide a stable and appropriate driving force to the sealing fixture 3, ensuring that the sealing fixture 3 is tightly fitted with the deep hole of the workpiece, avoiding problems such as loose sealing or uneven force caused by improper positioning of the cylinder 51, thereby improving the accuracy and reliability of the deep hole sealing test results and providing strong support for product quality control.

[0056] Operators can easily adjust the position of cylinder 51 within guide groove 21 to suit the workpiece size. This simple and quick operation requires no complex tools or specialized skills. This convenient adjustment method not only improves pre-test preparation efficiency but also reduces the time and labor wasted on equipment adjustments, thereby improving overall production efficiency.

[0057] Example 4:

[0058] like Figure 2 、 3 As shown, further, a guide rod 521 is provided on the cylinder base 52, a through hole is provided at one end of the blocking tool 3, and the guide rod 521 is slidably connected to the through hole.

[0059] In practice, the blocking fixture 3 is threadedly connected to the telescopic rod 511 of the cylinder 51. It also slidably engages the through-hole of the blocking fixture 3 with the guide rod 521 on the cylinder base 52. This design enables automated operation of the blocking fixture 3. By controlling the extension and retraction of the cylinder 51, deep holes can be quickly and accurately blocked and released. Furthermore, the guide rod 521 prevents the blocking fixture 3 from rotating during operation, ensuring accurate blocking positions. This improves test consistency and stability and reduces the uncertainty of manual operation.

[0060] The plugging fixture 3 utilizes a quick-change mechanism with a uniform spacing between the telescopic rod connection holes (for connecting to the telescopic rod 511) and the guide rod connection holes (for connecting to the guide rod 521). When faced with workpieces with different hole spacings, simply quickly replace the corresponding plugging fixture 3 to adapt to the new workpiece deep hole testing requirements. This improves the versatility of the testing platform, reduces fixture production and management costs, and improves production efficiency.

[0061] Example 5:

[0062] like Figure 2 、 3 As shown, further, a sealing ring groove 311 is provided on the sealing head 31 , and a sealing ring is embedded in the sealing ring groove 311 .

[0063] In practice, the sealing head 31 is provided with a sealing ring groove 311 and embedded with a sealing ring. This design enhances the sealing performance of the sealing head 31. Within the groove, the sealing ring adheres tightly to the deep hole wall, forming a sealed barrier that effectively prevents leakage of the test liquid. Compared with traditional, simple flat sealing methods, this design significantly improves the sealing performance of the test process, reduces test errors and the number of retests caused by leakage, and improves test efficiency and quality.

[0064] In actual production scenarios, some workpieces already have inherent sealing structures at their openings due to their design requirements and functional characteristics. When performing deep-hole tightness tests on such workpieces, even if the test platform's plugging head 31 lacks a sealing ring groove 311 and a sealing ring, the workpiece's inherent sealing structure can still be utilized to complete the tightness test.

[0065] Example 6:

[0066] like Figure 2 、 3 As shown, further, the blocking tool 3 includes a first blocking tool 301 and a second blocking tool 302 that are arranged opposite to each other.

[0067] During specific implementation, the sealing fixture 3 includes a first sealing fixture 301 and a second sealing fixture 302 arranged opposite to each other. This design is suitable for situations where both ends of a deep hole need to be sealed at the same time. The two sealing fixtures cooperate with each other to seal both ends of the deep hole at the same time, ensuring that the liquid does not leak from both ends of the deep hole during the test, thereby improving the accuracy and reliability of the test. During the test, the two oppositely arranged sealing fixtures are driven by the cylinder 51 to move simultaneously from both ends of the deep hole to the deep hole, until the two sealing heads 31 are tightly fitted with the orifices at both ends of the deep hole, respectively, to achieve a comprehensive seal of the deep hole. The test liquid is then injected into the deep hole through the injection tube 46 to perform a sealing test.

[0068] When the entrance and exit of the deep hole of the workpiece is only located on one side or the other side of the deep hole itself has a sealing plug, only one side of the deep hole needs to be sealed with a sealing fixture 3. During the test, the test liquid is injected through the fixture channel 32 inside the sealing fixture 3. Since the other side has a sealing plug, the liquid cannot flow out, thus forming a closed space. By observing the changes in the pointer of the pressure gauge 47, the sealing performance of the deep hole can be judged. In the case where only one side needs to be sealed by the sealing fixture 3, a baffle can be installed on the other side of the workpiece to be tested to ensure that the ejection of the sealing fixture 3 will not cause the workpiece to be tested to move.

[0069] Example 7:

[0070] like Figure 3 As shown, further, a positioning pin 22 is connected to the top of the pressure test base 2.

[0071] During implementation, the positioning pin 22 must have high strength, wear resistance, and good dimensional stability. The material can be tool steel (such as Cr12MoV steel) or alloy steel (such as 40Cr steel). For applications requiring special rust resistance, stainless steel (such as 304 stainless steel) can be used.

[0072] The locating pin 22 can be designed as a cylindrical pin and / or a conical pin. Cylindrical pins have a simple structure and are easy to manufacture. Their cylindrical surface mates with the workpiece locating hole, enabling excellent radial positioning. Conical pins utilize their taper to achieve self-centering and reliable positioning, with high positioning accuracy, making them suitable for applications requiring stringent positioning precision. Furthermore, special-shaped locating pins (not referenced) can be designed to accommodate the unique shape of the workpiece locating hole, such as those with keyways or notches, to achieve even more precise and stable positioning.

[0073] Locating pin 22 enables rapid positioning and alignment of the workpiece under test. In practice, the worker simply aligns the workpiece's locating hole with the locating pin 22 and inserts it. Leveraging the pin's shape and size, the workpiece quickly achieves the correct position and orientation. The self-centering nature of locating pin 22 allows the workpiece to automatically find its center during insertion, significantly reducing workpiece positioning time and improving testing efficiency.

[0074] Example 8:

[0075] like Figure 1 As shown, further, a cushion block 23 is connected to the top of the pressure test base 2.

[0076] In practice, the material of the pad 23 can be selected based on factors such as wear resistance, pressure resistance, and corrosion resistance. Metal materials, such as aluminum alloy, can be used, as they are lightweight, strong, and corrosion-resistant, making them suitable for applications with weight constraints and complex working conditions. Alternatively, high-strength engineering plastics, such as polyoxymethylene (POM), can be used, as they offer excellent wear resistance, self-lubrication, and dimensional stability, while being relatively low-cost and suitable for mass production.

[0077] The shape of the pad 23 can be designed to be rectangular, which is simple to process, easy to install and fix, and can provide stable support; it can also be designed to be trapezoidal. The trapezoidal pad can use its inclined surface characteristics to achieve some special positioning or guiding functions while ensuring the support strength; if it is necessary to evenly disperse the pressure, the pad 23 can also be designed to be circular, which is evenly stressed and wears more evenly.

[0078] First, the pad 23 can act as a buffer, reducing the impact force generated during the operation of the device and protecting the workpiece, the pressure test base 2 and other components from damage; secondly, the pad 23 can adjust the height so that the workpiece reaches the ideal position to be tested; it can also improve the stress distribution on the contact surface, avoid local stress concentration, and extend the service life of the device.

[0079] Example 9:

[0080] like Figure 1 、 3 As shown, further, a plurality of threaded mounting holes 24 are provided on the top of the pressure test base 2, and the positioning pins 22 and / or the pads 23 are connected to the threaded mounting holes 24 by bolts.

[0081] In specific implementation, this connection method is convenient and fast, and is easy to install or remove the locating pins 22 and the pads 23 according to the needs of different workpieces. When it is necessary to replace the locating pins 22 of different specifications or adjust the position of the pads 23, it can be achieved by simply turning the bolts, which can improve the flexibility and adjustability of the test platform. When installing the locating pins 22 or the pads 23, align the mounting holes on the locating pins 22 or the pads 23 with the threaded mounting holes 24 on the pressure test base 2, and then pass the bolts through the mounting holes (specifically, step holes) of the locating pins 22 or the pads 23 and screw them into the threaded mounting holes 24. Fix the locating pins 22 or the pads 23 on the pressure test base 2 by tightening the bolts. When disassembling, just turn the bolts in the opposite direction. This connection method is simple to operate and can quickly complete the installation and disassembly of the locating pins 22 and the pads 23.

[0082] Example 10:

[0083] like Figure 3 、 4 As shown, further, the first valve 44 is connected to the first switch 441, the second valve 45 is connected to the second switch 451, and the cylinder 51 is connected to the reversing valve 512;

[0084] The first switch 441 , the second switch 451 and / or the reversing valve 512 are arranged on the top of the pressure test base 2 .

[0085] In practice, the reversing valve 512 switches the cylinder 51 between extension and retraction, driving the sealing fixture 3 against the workpiece's end face, sealing the oil hole on that end face and achieving rapid clamping and release. The reversing valve 512 precisely controls the retraction and extension of the cylinder 51. During testing, the reversing valve 512 allows the cylinder 51 to rapidly extend and push the sealing fixture 3, achieving automatic sealing of the deep hole. Once the test is complete, the cylinder 51 can be quickly retracted to separate the sealing fixture 3 from the deep hole.

[0086] If the first switch 441 and the second switch 451 are mechanical switches, attention should be paid to the piping layout. The first valve 44 and the second valve 45 should be placed as close as possible to the bottom of the pressure test base 2, which facilitates the placement of the first switch 441 and the second switch 451 on the top of the pressure test base 2. This allows the operator to conveniently open and close the valves from the top of the pressure test base 2, conforming to ergonomic principles and improving operational convenience and efficiency.

[0087] If first switch 441 and second switch 451 are electric switches, piping layout is relatively flexible. Electric switches can be connected to a control unit (not referenced) via wires, eliminating strict restrictions on valve location. Even if the valve is installed in an inaccessible location, such as the bottom of the pressure test base 2, an operator can operate it from a distance using control buttons or a control panel.

[0088] Preferably, the first valve 44 and the second valve 45 are needle valves. The structure of the needle valve enables it to achieve precise regulation of the liquid flow rate. In the deep hole sealing test, the amount of liquid injected into the deep hole and the flow rate can be accurately controlled according to the requirements of different workpieces. For some deep holes that are more sensitive to pressure changes, the needle valve opening can be slowly adjusted to steadily increase the liquid pressure to avoid damage to the workpiece caused by a sudden pressure rise, and the sealing performance of the workpiece can also be more accurately judged. When the needle valve is in the closed state, the valve needle fits tightly against the valve seat, which can effectively prevent liquid leakage. This is crucial for deep hole sealing tests, because any slight leakage during the test may affect the accuracy of the test results. The good sealing performance of the needle valve can ensure the sealing of the test system and improve the reliability of the test results.

[0089] The test platform of the present invention can be used to test the sealing of the main oil channel of a workpiece after machining. Specifically, the following operations can be performed when using the test platform provided by the present invention:

[0090] 1. Preparation before testing

[0091] Perform a comprehensive inspection of all components of the test platform (base support 1, pressure test base 2, blocking fixture 3, cylinder 51, etc.) to ensure that there is no damage, the connections are firm, and all components can work normally.

[0092] According to the length of the workpiece to be tested, loosen the screws at the fixed position on the cylinder base 52, move the cylinder 51 within the guide groove 21 of the test platform through the cylinder bracket, adjust it to the appropriate position, tighten the screws to fix the cylinder base 52, and ensure that the cylinder 51 is within the effective stroke so that the sealing tool 3 can be accurately driven to seal the oil channel hole of the workpiece.

[0093] 2. Workpiece positioning and fixing

[0094] Use appropriate lifting equipment to stably lift the workpiece to be tested onto the pressure test platform.

[0095] The workpiece is accurately positioned above the pad 23 by the positioning pin 22 on the pressure test base 2, ensuring that the oil channel hole of the workpiece and the plugging tool 3 can be accurately aligned, preparing for the subsequent plugging operation.

[0096] 3. Seal the oil channel hole of the workpiece

[0097] Pull the reversing valve 512 to extend the cylinder 51. When the cylinder 51 extends, its telescopic rod 511 drives the blocking tool 3 connected thereto to move synchronously.

[0098] The plugging head 31 of the plugging tool 3 is pushed by the cylinder 51 to fit tightly against the oil hole on the end face of the workpiece, thereby effectively plugging the oil channel hole and preventing liquid leakage during the test.

[0099] 4. Sealing detection and judgment

[0100] Close the second valve 45 (ie, the pressure relief valve) to prevent the return liquid from flowing back to the water tank 41. At this time, the liquid can only enter the workpiece oil channel hole through the water inlet pipe.

[0101] Start the water pump 42, which injects the water in the water tank 41 into the workpiece oil passage hole through the pipeline, the three-way joint 43, the injection pipe 46, and the tooling channel 32. During the water injection process, closely observe the value changes of the pressure gauge 47.

[0102] When the pressure gauge 47 shows that the specified pressure value has been reached, the first valve 44 (i.e., the pressure maintaining valve) and the water pump 42 are closed to seal the water inlet pipe. At this time, the water flow in the oil channel maintains a certain pressure, and the pressure maintaining test begins.

[0103] During the pressure test, continuously observe the changes in the pointer of pressure gauge 47. If the pointer of pressure gauge 47 is stable within the specified test time and the pressure value does not drop significantly, it indicates that the oil passage hole of the workpiece is well sealed. If the pressure value drops significantly, it indicates that there is leakage in the oil passage hole of the workpiece and the sealing is unqualified.

[0104] 5. Post-test processing

[0105] After the test is completed, the first valve 44 (ie, the pressure maintaining valve) and the second valve 45 (ie, the pressure relief valve) are opened to gradually reduce the pressure in the oil passage.

[0106] After the liquid in the oil channel is depressurized, the reversing valve 512 is pulled to shrink the cylinder 51, driving the blocking tool 3 to separate from the oil channel hole of the workpiece, thereby releasing the blockage of the workpiece.

[0107] Use lifting equipment to lift the workpiece from the pressure test platform and transfer it to the designated location to complete the entire testing process.

[0108] In summary, the present invention has the technical advantages of greatly improving test efficiency, simplifying the operation process, and having a wide and flexible scope of application.

[0109] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A deep hole sealing test platform, comprising a base support (1), wherein a pressure test base (2) is provided on the base support (1), characterized in that: At least one sealing fixture (3) is provided on the top of the pressure test base (2), and a water tank (41) and a water pump (42) are provided below the pressure test base (2); A blocking head (31) is provided at one end of the blocking tool (3), and a tool channel (32) is provided inside at least one of the blocking tools (3), with the outlet of the tool channel (32) being located in the middle of the blocking head (31); The liquid outlet of the water tank (41) is connected to the liquid inlet of the water pump (42) through a pipeline. The liquid outlet of the water pump (42) is connected to the liquid inlet of the first valve (44) and the liquid inlet of the second valve (45) through a pipeline and a three-way joint (43). The liquid outlet of the first valve (44) is connected to the liquid inlet of the injection pipe (46) through a pipeline. A pressure gauge (47) is provided between the liquid outlet of the injection pipe (46) and the first valve (44). The liquid outlet of the injection pipe (46) is connected to the inlet of the tooling channel (32). The liquid outlet of the second valve (45) is connected to the liquid inlet of the water tank (41) through a pipeline.

2. The deep hole sealing test platform according to claim 1, characterized in that: A cylinder (51) is also provided on the top of the pressure test base (2), and a telescopic rod (511) of the cylinder (51) is threadedly connected to the blocking tool (3).

3. The deep hole sealing test platform according to claim 2, characterized in that: A guide groove (21) is provided on the top of the pressure test base (2), and the cylinder (51) is adjustably connected to the guide groove (21) via a cylinder base (52).

4. The deep hole sealing test platform according to claim 3, characterized in that: A guide rod (521) is provided on the cylinder base (52), a through hole is provided at one end of the blocking fixture (3), and the guide rod (521) is slidably connected to the through hole.

5. The deep hole sealing test platform according to claim 1, characterized in that: A sealing ring groove (311) is provided on the sealing head (31), and a sealing ring is embedded in the sealing ring groove (311).

6. The deep hole sealing test platform according to claim 1, characterized in that: The blocking tool (3) comprises a first blocking tool (301) and a second blocking tool (302) arranged opposite to each other.

7. The deep hole sealing test platform according to claim 1, characterized in that: A positioning pin (22) is connected to the top of the pressure test base (2).

8. The deep hole sealing test platform according to claim 7, characterized in that: A cushion block (23) is connected to the top of the pressure test base (2).

9. The deep hole sealing test platform according to claim 8, characterized in that: The top of the pressure test base (2) is provided with a plurality of threaded mounting holes (24), and the positioning pins (22) and / or the pads (23) are connected to the threaded mounting holes (24) via bolts.

10. The deep hole sealing test platform according to claim 2, characterized in that: The first valve (44) is connected to the first switch (441), the second valve (45) is connected to the second switch (451), and the cylinder (51) is in communication with the reversing valve (512); The first switch (441), the second switch (451) and / or the reversing valve (512) are arranged on the top of the pressure test base (2).

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