A portable high-pressure common rail system press detection device

Abstract

The application discloses a portable high-pressure common rail system pressing detection device, which comprises a table top, support legs are fixedly arranged at the four corners of the bottom of the table top, two parallel through holes are formed in the upper end of the table top, slide rods are fixedly arranged in the through holes, two groups of symmetrically arranged square ring frames are assembled on the two slide rods and slide on the two slide rods in common; a bidirectional synchronous driving mechanism for driving the two groups of square ring frames to move towards each other / sideways is arranged at the bottom of the table top, a slot is formed in the top of the square ring frame, an insertion block is inserted into the slot, and a clamp is integrally arranged at the upper end of the insertion block. The portable high-pressure common rail system pressing detection device is purely mechanical and does not comprise electrical components, a detachable hand pump is free from power supply limitation, and the portable high-pressure common rail system pressing detection device is suitable for field and power failure emergency repair. The bidirectional synchronous clamping is accurate, the worm and the worm gear are self-locked to avoid pressure holding loosening, the clamp can be quickly disassembled and assembled, the structure is compact and portable, and the portable high-pressure common rail system pressing detection device can efficiently complete sealing pressing detection of high-pressure common rail components of different specifications.

Description

Technical Field

[0001] This invention relates to the field of diesel engine testing technology, specifically a portable high-pressure common rail system pressure testing device. Background Technology

[0002] The high-pressure common rail system for diesel engines boasts advantages such as flexible and adjustable injection pressure, high injection pressure, controllable injection rate, and high control precision. It can precisely adjust parameters such as injection advance angle, injection pressure, injection timing, and injection flow rate, enabling low-speed, high-pressure injection and multiple injection functions. It is a core component for improving diesel engine performance and reducing exhaust emissions. The high-pressure common rail system can withstand a maximum fuel pressure of 300 MPa, placing stringent requirements on overall sealing. If leakage occurs after the entire engine is assembled, disassembly and repair are time-consuming and labor-intensive. Therefore, pressure testing and sealing checks must be performed before installation.

[0003] The existing high-pressure common rail pressure testing equipment has obvious defects: (1) The mainstream pressure testing equipment relies on variable frequency motors and frequency converters for drive, and must be connected to an external AC power supply. The equipment integrates a large number of electrical components, which cannot be used in power-free scenarios such as in the field, on ships, mobile repairs on vehicles, and power plant areas without power supply; (2) The equipment is large in size, inconvenient to disassemble and assemble, and difficult to transport, making it difficult to meet the needs of outdoor emergency repairs and on-site mobile testing; (3) The traditional clamping mechanism does not have a synchronous bidirectional clamping structure, and the positioning accuracy of clamping different specifications of common rail components is poor. The clamping is easy to loosen during the pressure test, and the stability of pressure holding test is insufficient; in addition, the tooling fixtures are cumbersome to disassemble and assemble, and it takes a long time to replace different models of common rail components, resulting in low testing efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a portable high-pressure common rail system pressure testing device that enables power-free field operation, bidirectional synchronous self-locking clamping, quick fixture assembly and disassembly, and is compatible with sealing testing of various specifications of high-pressure common rail components.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable pressure testing device for a high-pressure common rail system, comprising a platform, with support legs fixed at the four corners of the bottom of the platform, and two parallel through holes at the upper end of the platform, with sliding rods fixed inside the through holes, and two sets of symmetrically arranged square ring frames slidably mounted on the two sliding rods.

[0006] The bottom of the platform is provided with a bidirectional synchronous drive mechanism for driving two sets of square ring frames to move synchronously towards each other or away from each other.

[0007] The top of the square ring frame has a slot, a plug is inserted into the slot, the upper end of the plug has a clamp integrally formed, and the outer side of the square ring frame is equipped with a locking component. The side wall of the plug has a locking groove that matches the locking component.

[0008] A manual pump is detachably mounted on the upper edge of the platform. The output end of the manual pump is connected to a high-pressure hose. A connector is fixed at the end of the high-pressure hose. A pressure gauge is installed on the manual pump.

[0009] As a preferred embodiment of the present invention, the bidirectional synchronous drive mechanism includes two drive plates arranged in an inclined and staggered manner, and the two drive plates are respectively fixed to the bottom of two square ring frames.

[0010] A lead screw is rotatably mounted at the center of the bottom of the platform, and the bottom end of the lead screw is rotatably supported on the upper surface of the connecting plate.

[0011] The lead screw is threaded with a lifting seat, and a drive rod is fixed on both sides of the lifting seat. The drive plate is provided with an elongated hole that matches the drive rod, and the drive rod is slidably embedded in the corresponding elongated hole.

[0012] The bottom of the platform is also equipped with an anti-reverse drive assembly that is linked to the lead screw.

[0013] As a preferred embodiment of the present invention, vertical rods are symmetrically fixed to the bottom of the platform on both sides of the lead screw, and the lower ends of the two vertical rods are jointly fixed to a connecting plate. The lifting seat is slidably fitted onto the outside of the two vertical rods.

[0014] As a preferred embodiment of the present invention, the anti-reverse drive assembly includes a fixed plate, a worm gear, a fixed base, a crank handle, and a worm wheel;

[0015] The fixing plate is fixed to the bottom of the table, and the worm gear is rotatably mounted on the fixing plate;

[0016] A fixed base is fixedly provided at the bottom of the platform. The fixed base is located on one side of the fixed plate. The middle section of the worm gear passes through the fixed base and rotates with it. The extended end of the worm gear passes through the fixed base and is fixedly connected to a crank handle.

[0017] A worm gear is fixedly connected to the upper end of the lead screw, and the worm gear meshes with the worm to form a self-locking anti-reverse structure.

[0018] As a preferred embodiment of the present invention, the locking assembly includes a housing, a slider, a locking block, a pull rod, a pull plate, and a spring;

[0019] The outer shell is fixed to the outside of the square ring frame, and a slider is slidably assembled inside the outer shell. A locking block is fixed on the side of the slider facing the locking groove, and a third guide slope is opened on the top surface of the insertion end of the locking block.

[0020] The slider is connected to a pull rod on the side away from the locking groove, and one end of the pull rod extends out of the outer shell and is fixedly connected to a pull plate;

[0021] The spring is sleeved on the outside of the pull rod and placed inside the housing, with the two ends of the spring abutting against the inner wall of the housing and the slider, respectively.

[0022] As a preferred embodiment of the present invention, a first guide slope is provided around the bottom of the insert block, and a second guide slope is formed on the edge of the slot that is adapted to the first guide slope.

[0023] As a preferred embodiment of the present invention, a travel limiting plate is fixedly provided at the center of the through hole, and the travel limiting plate is used to limit the sliding limit travel of the square ring frame.

[0024] Compared with the prior art, the beneficial effects of the present invention are: (1) The device adopts a pure mechanical structure, without electrical components such as motors and frequency converters. The pressure is provided by a detachable manual pump. The manual pump can be disassembled and stored separately and carried independently. It is not limited by the power supply conditions and is suitable for field repair, ship engine room, vehicle-mounted mobile detection, power plant area and other scenarios. It is convenient to transport. (2) The bidirectional synchronous drive mechanism, together with the screw lifting and tilting drive plate, realizes the synchronous clamping of two sets of clamps in opposite directions and the clamping force is uniform. The worm gear meshing has mechanical self-locking characteristics. The screw will not rotate in the opposite direction during the pressure holding process, avoiding the loosening of the workpiece. It greatly improves the stability and accuracy of high pressure holding detection and can be adapted to high pressure common rail parts of different shapes and sizes. (3) The insert and slot are set with bidirectional guide slopes, and the insertion and alignment are simple. The matching spring automatic locking structure automatically locks after insertion. When changing the clamp, it is only necessary to pull the pull plate to unlock. No additional fasteners are required, and the tooling replacement time is greatly shortened. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the bidirectional synchronous drive mechanism in this invention;

[0027] Figure 3 This is a disassembly diagram of the slot-plug junction in this invention;

[0028] Figure 4 This is a schematic diagram of the locking component in this invention.

[0029] In the diagram: 1. Tabletop, 2. Through hole, 3. Slide rod, 4. Square ring frame, 5. Two-way synchronous drive mechanism, 501. Drive plate, 502. Lead screw, 503. Vertical rod, 504. Connecting plate, 505. Lifting seat, 506. Drive rod, 507. Long hole, 508. Anti-reverse drive assembly, 5081. Fixing plate, 5082. Worm gear, 5083. Fixing seat, 5084. Handle, 5085. Worm wheel, 6. Slot, 7. Insert block, 8. Clamp, 9. Locking assembly, 901. Housing, 902. Slider, 903. Locking block, 904. Pull rod, 905. Pull plate, 906. Spring, 907. Third guide slope, 10. Locking groove, 11. Manual pump, 12. High-pressure hose, 13. Connector, 14. Pressure gauge, 15. Stroke limit plate, 16. First guide slope, 17. Second guide slope. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments (for ease of description and understanding, the following refers to...). Figure 1 (The above is described above). Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0031] like Figure 1 As shown, the present invention provides a technical solution: a portable high-pressure common rail system pressure testing device, including a platform 1, with fixed support legs welded to the four corners of the bottom of the platform 1, and two parallel through holes 2 opened at the upper end of the platform 1. A sliding rod 3 is fixed inside each through hole 2 along its length direction, and two sets of symmetrical square ring frames 4 are passed through the two sliding rods 3. The square ring frames 4 can slide horizontally along the sliding rods 3.

[0032] The bottom of the platform 1 is equipped with a bidirectional synchronous drive mechanism 5, which is used to synchronously drive the two square ring frames 4 to approach or separate.

[0033] An open slot 6 is provided at the top of the square ring frame 4. A plug block 7 is vertically inserted into the slot 6. A clamp 8 is integrally formed at the upper end of the plug block 7. The clamp 8 is used to fit and hold the high-pressure common rail workpiece.

[0034] A locking component 9 is installed on the outer side of the square ring frame 4. A locking groove 10 matching the locking component 9 is opened on the side wall of the plug 7. The locking component 9 is inserted into the locking groove 10 to lock the plug 7.

[0035] A detachable manual pump 11 is installed on one edge of the upper surface of the table 1. The manual pump 11 can be removed and stored separately. It can perform pressure operation without power. The oil outlet of the manual pump 11 is connected to a high-pressure hose 12. A metal connector 13 is installed at the end of the high-pressure hose 12. The connector 13 is used to seal the connection with the high-pressure common rail workpiece inspection port. A pressure gauge 14 is installed on the manual pump 11 to display the internal pressure of the pipeline in real time.

[0036] like Figure 2 As shown, in this embodiment, the bidirectional synchronous drive mechanism 5 includes two inclined and staggered drive plates 501, which are respectively welded to the bottom of two square ring frames 4.

[0037] A rotatable lead screw 502 is installed at the center of the bottom of the tabletop 1, and the lower end of the lead screw 502 is rotatably supported on the upper surface of the connecting plate 504.

[0038] The lead screw 502 is threaded with a lifting seat 505. The lifting seat 505 has drive rods 506 extending laterally from both sides. The drive plate 501 has elongated holes 507 that are adapted to the drive rods 506. The drive rods 506 are slidably embedded in the corresponding elongated holes 507.

[0039] When the lead screw 502 rotates in the forward direction, the lifting seat 505 moves downward along the lead screw 502, the drive rod 506 presses down on the elongated hole 507, pushes the two inclined drive plates 501 to move closer to each other, and drives the two square ring frames 4 to slide towards each other synchronously to clamp the workpiece; when the lead screw 502 rotates in the reverse direction, the lifting seat 505 moves upward, and the square ring frames 4 synchronously separate and release the workpiece.

[0040] Furthermore, vertical rods 503 are symmetrically fixed on the bottom surface of the platform 1 and on both sides of the lead screw 502. The lower ends of the two vertical rods 503 are welded together with a connecting plate 504. The bottom end of the lead screw 502 is rotatably supported at the center of the connecting plate 504. The lifting seat 505 has through holes on the left and right sides and is slidably fitted on the outside of the two vertical rods 503. The vertical rods 503 play a vertical limiting and guiding role for the lifting seat 505, ensuring that the lifting action of the lifting seat 505 is stable and without deflection.

[0041] In this embodiment, the bottom of the platform 1 is also equipped with an anti-reverse drive assembly 508 that is linked with the lead screw 502. The anti-reverse drive assembly 508 includes a fixed plate 5081, a worm gear 5082, a fixed base 5083, a crank handle 5084, and a worm wheel 5085.

[0042] The fixing plate 5081 is fixed to the bottom of the table 1. One end of the worm gear 5082 is rotatably mounted on the fixing plate 5081. A fixing seat 5083 is welded to the bottom of the table 1. The fixing seat 5083 is located on one side of the fixing plate 5081. The middle section of the worm gear 5082 passes through the fixing seat 5083 and rotates with it. The extended end of the worm gear 5082 passes through the fixing seat 5083 and is fixedly connected to the crank handle 5084.

[0043] A worm gear 5085 is coaxially fixed at the upper end of the lead screw 502. The worm gear 5085 meshes with the worm 5082 for transmission. During operation, the crank handle 5084 is manually rotated to drive the worm 5082 to rotate. The worm 5082 drives the worm gear 5085 to rotate synchronously. The worm gear 5085 drives the lead screw 502 to rotate. Due to the one-way self-locking characteristic of the worm gear-worm, after the crank handle 5084 is released, the worm 5082 cannot be driven in the opposite direction by the worm gear 5085. The lead screw 502 is locked and fixed, and the clamped state will not loosen, which meets the high-pressure holding test requirements.

[0044] like Figure 3 , Figure 4 As shown, the locking assembly 9 includes a housing 901, a slider 902, a locking block 903, a pull rod 904, a pull plate 905, and a spring 906;

[0045] The outer shell 901 is fixed to the outside of the square ring frame 4. The inner side of the outer shell 901 is equipped with a slider 902. The side of the slider 902 facing the locking groove 10 is integrally formed with a locking block 903. The top surface of the insertion end of the locking block 903 is provided with a third guide slope 907.

[0046] A pull rod 904 is connected to the side of the slider 902 away from the locking groove 10. One end of the pull rod 904 extends out of the outer shell 901 and is fixedly connected to a pull plate 905.

[0047] Spring 906 is sleeved on the outside of pull rod 904 and placed inside housing 901. The two ends of spring 906 abut against the inner wall of housing 901 and slider 902 respectively. Under normal conditions, spring 906 pushes slider 902 to extend inward, and locking block 903 pops out.

[0048] When replacing clamp 8, pull the pull plate 905 outward, the slider 902 compresses the spring 906 and retracts, the locking block 903 disengages from the locking groove 10, and the insert 7 and clamp 8 can be pulled out upward; when installing a new clamp 8, insert 7 is vertically inserted into slot 6, the bottom end of insert 7 presses against the third guide slope 907, automatically pushing the locking block 903 back into the housing 901. After insert 7 is fully in place, spring 906 pushes the locking block 903 to automatically engage in the locking groove 10 to complete the locking, without the need for additional tightening operation.

[0049] Furthermore, the bottom of the insert 7 is provided with a first guide slope 16 around its perimeter, and the groove edge of the slot 6 is formed with a second guide slope 17 that is adapted to the first guide slope 16. With the two sets of slopes working together, the insert 7 is automatically centered and aligned when inserted into the slot 6, reducing the difficulty of manual alignment and improving the assembly speed of the fixture 8.

[0050] Furthermore, a travel limit plate 15 is fixed at the center of the through hole 2. When the square ring frame 4 slides towards the center, the maximum movement distance is limited by the travel limit plate 15, which prevents the two clamps 8 from colliding excessively and protects the workpiece and the device structure.

[0051] The usage process is as follows:

[0052] Workpiece clamping: First, place the high-pressure common rail component to be inspected between the two clamps 8. Turn the crank handle 5084, which drives the worm gear 5082 to rotate. The worm gear 5082 meshes with the worm wheel 5085, driving the lead screw 502 to rotate. The lead screw 502 drives the lifting seat 505 to move downward along the vertical rod 503. The drive rods 506 on both sides of the lifting seat 505 slide in the drive grooves 507 of the drive plate 501, pushing the two drive plates 501 and the square ring frame 4 to move synchronously towards each other along the slide rod 3. The stroke limit plate 15 restricts the sliding stroke of the square ring frame 4 until the two clamps 8 stably clamp the high-pressure common rail component. The worm wheel 5085 and worm gear 5082 rotate downward. The 82 structure achieves self-locking and anti-reverse rotation. The detachable manual pump 11 is quickly assembled and positioned. The high-pressure hose 12 is sealed and connected to the test port of the high-pressure common rail system through the connector 13. No power is required throughout the process. It is purely manual pressurization. The manual pump 11 is operated to pressurize the high-pressure common rail system. The pressure value is observed through the pressure gauge 14. Once the pressure reaches the set value, the pressurization is stopped and the pressure is maintained. The change in the value of the pressure gauge 14 is observed to judge the sealing performance of the high-pressure common rail system. After the test is completed, the handle 5084 is turned in the opposite direction to loosen the square ring frame 4 from the clamp 8. The high-pressure common rail component can be removed. The manual pump 11 can be quickly disassembled and stored separately for easy transfer to different scenes and field operations.

[0053] Fixture 8 replacement: When fixture 8 needs to be replaced, pull the pull plate 905. The pull plate 905 drives the slider 902 and locking block 903 to compress the spring 906 and disengage from the locking groove 10 via the pull rod 904. Pull the fixture 8 upward to disengage the insert 7 from the slot 6. When replacing with a new fixture 8, align the insert 7 with the slot 6 and insert it. The first guide slope 16 and the second guide slope 17 cooperate to guide. The insert 7 presses against the third guide slope 907 to automatically retract the locking block 903. After the insert 7 is in place, the locking block 903 is locked into the locking groove 10 under the action of the spring 906 to complete the automatic locking. The testing operation can then continue.

[0054] The parts of the invention not described in detail are prior art. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable pressure testing device for a high-pressure common rail system, comprising a platform (1), wherein support legs are fixed at the four corners of the bottom of the platform (1), characterized in that: The upper end of the platform (1) is provided with two parallel through holes (2), and a sliding rod (3) is fixed in the through hole (2). Two sets of symmetrically arranged square ring frames (4) are slidably assembled on the two sliding rods (3). The bottom of the platform (1) is provided with a bidirectional synchronous drive mechanism (5) for driving two sets of square ring frames (4) to move synchronously towards each other / backwards. The top of the square ring frame (4) has a slot (6), a plug (7) is inserted into the slot (6), and a clamp (8) is integrally formed on the upper end of the plug (7). The outer side of the square ring frame (4) is equipped with a locking component (9), and the side wall of the plug (7) has a locking groove (10) that matches the locking component (9). A manual pump (11) is detachably mounted on the upper edge of the platform (1). The output end of the manual pump (11) is connected to a high-pressure hose (12). A connector (13) is fixed at the end of the high-pressure hose (12). A pressure gauge (14) is installed on the manual pump (11).

2. The portable high-pressure common rail system pressure testing device according to claim 1, characterized in that: The bidirectional synchronous drive mechanism (5) includes two inclined and staggered drive plates (501), which are respectively fixed to the bottom of two square ring frames (4). A lead screw (502) is rotatably mounted at the center of the bottom of the table (1), and the bottom end of the lead screw (502) is rotatably supported on the upper surface of the connecting plate (504). The lead screw (502) is threaded with a lifting seat (505), and a drive rod (506) is fixed on both sides of the lifting seat (505). The drive plate (501) is provided with an elongated hole (507) adapted to the drive rod (506), and the drive rod (506) is slidably embedded in the corresponding elongated hole (507). The bottom of the platform (1) is also equipped with an anti-reverse drive assembly (508) that is linked to the lead screw (502).

3. The portable high-pressure common rail system pressure testing device according to claim 1, characterized in that: The bottom of the platform (1) is symmetrically fixed with vertical rods (503) on both sides of the lead screw (502). The lower ends of the two vertical rods (503) are fixed to the connecting plate (504). The lifting seat (505) is slidably fitted on the outside of the two vertical rods (503).

4. The portable high-pressure common rail system pressure testing device according to claim 1, characterized in that: The anti-reverse drive assembly (508) includes a fixed plate (5081), a worm gear (5082), a fixed base (5083), a crank handle (5084), and a worm wheel (5085); The fixing plate (5081) is fixed to the bottom of the table (1), and the worm gear (5082) is rotatably mounted on the fixing plate (5081); A fixed seat (5083) is fixedly provided at the bottom of the table (1). The fixed seat (5083) is located on one side of the fixed plate (5081). The middle section of the worm (5082) passes through the fixed seat (5083) and rotates with it. The extended end of the worm (5082) passes through the fixed seat (5083) and is fixedly connected to a crank (5084). The upper end of the lead screw (502) is fixedly connected to a worm gear (5085), and the worm gear (5085) meshes with the worm (5082) to form a self-locking anti-reverse structure.

5. The portable high-pressure common rail system pressure testing device according to claim 1, characterized in that: The locking assembly (9) includes a housing (901), a slider (902), a locking block (903), a pull rod (904), a pull plate (905), and a spring (906). The outer shell (901) is fixed to the outside of the square ring frame (4). The inner side of the outer shell (901) is equipped with a slider (902). The slider (902) is fixed with a locking block (903) on the side facing the locking groove (10). The top surface of the insertion end of the locking block (903) is provided with a third guide slope (907). The slider (902) is connected to a pull rod (904) on the side away from the locking groove (10). One end of the pull rod (904) extends out of the outer shell (901) and is fixedly connected to a pull plate (905). The spring (906) is sleeved on the outside of the pull rod (904) and placed inside the outer shell (901). The two ends of the spring (906) abut against the inner wall of the outer shell (901) and the slider (902), respectively.

6. The portable high-pressure common rail system pressure testing device according to claim 1, characterized in that: The bottom of the insert (7) is provided with a first guide slope (16) around its perimeter, and the slot (6) has a second guide slope (17) formed at the edge of its slot that is adapted to the first guide slope (16).

7. The portable high-pressure common rail system pressure testing device according to claim 1, characterized in that: A travel limit plate (15) is fixed at the center of the through hole (2), and the travel limit plate (15) is used to limit the sliding limit travel of the square ring frame (4).

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