Watertight test device suitable for engine body

Abstract

The utility model relates to a watertight test device suitable for an engine body in the field of engine detection, and the device comprises a roller way positioning device which is used for bearing and positioning the engine body; the plugging device is erected beside the roller way positioning device and is used for plugging the water hole of the engine body; and the water injection mechanism is erected beside the roller way positioning device and used for blocking a water inlet hole and a water outlet hole of the engine body and injecting water into the cooling liquid cavity through the water inlet hole. The watertight test device can quickly and accurately determine an unqualified engine body leakage part, and effectively reduces the difficulty of sealing test detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engine detection, and in particular to a water tightness test device for engine body. BACKGROUND

[0002] Before assembling internal parts, the engine body needs to be detected for water cavity sealing performance, which is of great significance for ensuring engine performance, improving engine reliability and ensuring engine safety. At present, most of the sealing performance detection is air tightness test. When the engine body air tightness test is unqualified, only the current detected engine body has performance defects, but the specific position cannot be determined. CONTENT OF THE UTILITY MODEL

[0003] In view of the problems in the background art, the present application provides a water tightness test device for engine body, which can quickly and accurately determine the leakage position of unqualified engine body, and effectively reduce the difficulty of sealing test detection.

[0004] According to one aspect of the present application, a water tightness test device for engine body is provided, comprising: a roller positioning device for carrying and positioning the engine body; a plugging device erected beside the roller positioning device for plugging the water hole of the engine body; a water injection mechanism erected beside the roller positioning device for plugging the water inlet hole and the water outlet hole of the engine body and filling the cooling liquid cavity with water through the water inlet hole.

[0005] In some embodiments of the present application, the roller positioning device comprises: a chassis; a mounting rail mounted on the top of the chassis; a plurality of rollers mounted on the mounting rail in the length direction of the mounting rail, the axis of the roller being perpendicular to the length direction of the mounting rail and parallel to the upper surface of the chassis, the upper top of the plurality of rollers being flush with each other and higher than the upper surface of the mounting rail; a first driving device for driving at least one of the plurality of rollers to rotate; a positioning pin mounted on the chassis for sliding insertion into the positioning hole on the engine body, the positioning hole being adapted to the positioning pin.

[0006] In some embodiments of the present application, the roller positioning device further comprises: a position detection sensor mounted on the top of the mounting rail for real-time detection of the motion state and position of the engine body; a deceleration signal inductor mounted on the top of the mounting rail for sending a deceleration signal to the first driving device when the engine body is detected to pass.

[0007] In some embodiments of the utility model, the roller positioning device further includes: a plurality of bottom supports, the plurality of bottom supports are arranged at intervals on the top of the chassis, a supporting plane is formed on the top of the bottom support, and a hole is formed on the mounting rail for mounting each bottom support; a height adjuster for adjusting the height of the mounting rail is mounted between the mounting rail and the chassis, and / or a height adjuster for adjusting the height of the bottom support is mounted between the bottom support and the chassis.

[0008] In some embodiments of the utility model, the roller positioning device further includes: a blocking baffle mounted on the top of the chassis and close to one end of the mounting rail.

[0009] In some embodiments of the utility model, the sealing device includes: a two-side sealing mechanism for sealing the water holes on both sides of the engine body; a top sealing mechanism for sealing the water holes on the top of the engine body; a front and rear end sealing mechanism for sealing the water holes on both ends of the engine body; and a bottom sealing mechanism for sealing the water holes on the bottom of the engine body.

[0010] In some embodiments of the utility model, the water injection mechanism includes: a water injection channel erected on one side of the roller positioning device for airtight docking with the water inlet hole of the engine body and for injecting water into the cooling liquid cavity; and a water outlet channel erected on the other side of the roller positioning device for airtight docking with the water outlet hole of the engine body and for discharging water from the cooling liquid cavity after the test is completed.

[0011] In some embodiments of the utility model, the water injection channel and the roller positioning device are connected through a second linear guide rail, and the water outlet channel and the roller positioning device are connected through a second linear guide rail.

[0012] In some embodiments of the utility model, the water injection channel and the water outlet channel are each provided with one at multiple positions.

[0013] In some embodiments of the utility model, the water tightness test device further includes: a master control regulator connected to the roller positioning device, the sealing device and the water injection mechanism through signal data lines.

[0014] Compared with the prior art, the utility model achieves the following technical effects:

[0015] The embodiment of the application provides a water-tight test device for an engine body, which can place the engine body to be tested on the top of a roller positioning device, position the engine body through the roller positioning device, block other water holes of the engine body except water inlet holes and water outlet holes through a blocking device, then completely block the water inlet holes and the water outlet holes through a water injection mechanism, fill the water inlet holes and the water outlet holes with water, completely discharge air in a cooling liquid cavity through the water inlet holes, and seal detection is carried out by using water with certain water pressure instead of gas, whether water leakage phenomenon exists on the outside of the engine body is observed, and unqualified engine body leakage positions can be quickly and accurately determined according to water leakage conditions of the engine body, so that the difficulty of sealing test detection is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0017] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the water-tight test device of the present application;

[0018] Figure 2 Fig. 2 is a schematic diagram of the structure of the roller positioning device of the present application;

[0019] Figure 3 Fig. 3 is a schematic diagram of the structure of the side blocking assembly of the present application;

[0020] Figure 4 Fig. 4 is a schematic diagram of the structure of the water injection mechanism of the present application.

[0021] The various reference signs in the drawings represent the following:

[0022] 10, roller positioning device; 11, underframe; 12, mounting rail; 13, roller; 14, first driving device; 15, positioning pin; 16, position detection sensor; 17, deceleration signal sensor; 18, base; 19, blocking baffle; 21, side blocking assembly; 211, blocking plate; 212, rubber ring; 213, third driving device; 214, fixing frame; 215, first linear guide rail; 216, positioning rod; 22, top blocking mechanism; 221, upper blocking head; 222, fifth driving device; 223, spring; 224, bottom plate; 225, fixing seat; 226, cylindrical guide rail; 227, sixth driving device; 23, end blocking assembly; 231, end blocking head; 232, seventh driving device; 233, stand; 234, fixed plate; 235, movable plate; 236, eighth driving device; 24, lower blocking assembly; 241, lower blocking head; 242, ninth driving device; 30, water injection mechanism; 31, water injection channel; 32, water outlet channel; 33, tenth driving device; 34, second linear guide rail; 40, general control regulator; 41, signal data line; 50, engine body. DETAILED DESCRIPTION

[0023] It should be noted that the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] The following description refers to the accompanying drawings. In the following description, same numbers in different drawings represent the same or similar elements unless otherwise represented. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0025] In the description of the present application, it should be understood that the terms "first", "second", and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, "multiple" means two or more, unless otherwise stated. "And / or", which describes the relationship between the associated objects, means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship.

[0026] The engine body water tightness test device provided by the embodiments of the present application is described below in conjunction with the drawings.

[0027] The embodiment of the application discloses a water tightness test device suitable for an engine body. Figure 1 As shown in the figure, the engine body 50 is internally formed with a cooling liquid cavity, and the surface of the engine body 50 is formed with water holes, water inlet holes and water outlet holes which are in communication with the cooling liquid cavity.

[0028] As shown in the figure, Figure 1 The water tightness test device comprises a roller positioning device 10, a plugging device and a water injection mechanism 30. The roller positioning device 10 is used for bearing and positioning the engine body 50. The plugging device is arranged beside the roller positioning device 10 and is used for plugging the water holes of the engine body 50. The water injection mechanism 30 is arranged beside the roller positioning device 10 and is used for plugging the water inlet holes and the water outlet holes of the engine body 50 and injecting water into the cooling liquid cavity through the water inlet holes.

[0029] By using the water tightness test device, the engine body 50 is first placed on the top of the roller positioning device 10, and then the engine body 50 is positioned by the roller positioning device 10. Then, the plugging device is used to plug the other water holes of the engine body 50 except the water inlet holes and the water outlet holes. Then, the water injection mechanism 30 is used to completely plug the water inlet holes and the water outlet holes, and water is injected into the cooling liquid cavity through the water inlet holes to completely discharge the air in the cooling liquid cavity and to replace the gas for sealing detection. By observing whether there is water leakage phenomenon on the outside of the engine body 50, the leakage position of the unqualified engine body 50 can be quickly and accurately determined according to the water leakage condition of the engine body 50, the difficulty of sealing test detection is effectively reduced, and after the leakage test is completed, the water flow in the cooling liquid cavity can be discharged through the water outlet holes and recycled after filtration.

[0030] In some embodiments of the utility model, as shown in the figure, Figure 2 The roller positioning device 10 comprises a base frame 11, a mounting rail 12, a plurality of rollers 13, a first driving device 14 and a positioning pin 15. The mounting rail 12 is mounted on the top of the base frame 11 and is arranged along the length direction of the base frame 11. The plurality of rollers 13 are mounted on the mounting rail 12 along the length direction of the mounting rail 12, the axis of the roller 13 is perpendicular to the length direction of the mounting rail 12 and is parallel to the upper surface of the base frame 11, the upper top of the plurality of rollers 13 is flush with each other and is higher than the upper surface of the mounting rail 12. The first driving device 14 is used for driving at least one of the plurality of rollers 13 to rotate. The positioning pin 15 is mounted on the base frame 11 and is used for slidingly inserting into a positioning hole on the engine body 50, and the positioning hole is adapted to the positioning pin 15.

[0031] In the embodiment, the engine body 50 to be tested is placed on top of the plurality of rollers 13, first supported by part of the plurality of rollers 13, and then the first driving device 14 is started to drive the rollers 13 at the bottom of the engine body 50 to rotate, thereby moving the engine body 50 on the chassis 11 through friction until the engine body 50 is moved to a suitable position, and the positioning pin 15 is inserted into the positioning hole on the engine body 50 to stably place the engine body 50 on top of the chassis 11, facilitating subsequent operation of the plugging device and the water injection mechanism 30 on the engine body 50.

[0032] In some embodiments of the utility model, as shown in Figure 2 The mounting rails 12 can be arranged in two or more parallel on top of the chassis 11, and the plurality of rollers 13 can be divided into groups according to the number of mounting rails 12, with one group of rollers 13 installed on each mounting rail 12. The plurality of rollers 13 in parallel can provide multi-line support for the bottom of the engine body 50, increase the support area, and improve the stability of the engine body 50 moving on the chassis 11.

[0033] In some embodiments of the utility model, part or all of the plurality of rollers 13 arranged on the mounting rail 12 can be used as the driving roller 13, and the remaining rollers 13 can be used as the driven roller 13, that is, the driving roller 13 is connected to the first driving device 14 and driven by the first driving device 14.

[0034] Preferably, all rollers 13 on the mounting rail 12 are used as driving rollers 13.

[0035] Further, the first driving device 14 can be an electric motor, which can drive the rollers 13 to rotate through coaxial connection, or can use gear transmission, chain transmission or belt transmission to realize the rotation of multiple driving rollers 13 driven by one motor.

[0036] Further, when using the arrangement of multiple mounting rails 12, the rollers 13 on the multiple mounting rails 12 can be aligned one by one and connected by a long shaft to form a whole, which is convenient for driving the paired rollers 13 by a motor through the long shaft.

[0037] In some embodiments of the utility model, the positioning pin 15 can be inserted into or withdrawn from the positioning hole on the chassis 11 by the second driving device.

[0038] In some embodiments of the utility model, the second driving device includes but is not limited to an electric push rod, a linear motor and other linear driving mechanisms.

[0039] Further, the shape of the positioning hole includes, but is not limited to, a round hole, a polygonal hole, and the like.

[0040] Preferably, the shape of the positioning hole is a round hole, and two positioning holes are arranged on the engine body 50, and two positioning pins 15 are arranged on the chassis 11, so that the positioning pins 15 are inserted into the positioning holes, and two-pin positioning is achieved.

[0041] In some embodiments of the present application, as shown in Figure 2 The roller positioning device 10 further includes a position detection sensor 16 and a deceleration signal sensor 17. The position detection sensor 16 is installed on the top of the mounting rail 12 and is used to detect the movement state and position of the engine body 50 in real time. The deceleration signal sensor 17 is installed on the top of the mounting rail 12 and is used to send a deceleration signal to the first driving device 14 when the engine body 50 is detected to pass.

[0042] In the present embodiment, the first driving device 14 drives the roller 13 on the mounting rail 12 to move the engine body 50. During the movement of the engine body 50, the position detection sensor 16 detects the movement state and position of the engine body 50 in real time. When the engine body 50 passes the position of the deceleration signal sensor 17, the deceleration signal sensor 17 can send a deceleration signal to the first driving device 14, so that the first driving device 14 controls the roller 13 to decelerate and stop. When the roller 13 decelerates and stops, the engine body 50 reaches the designated position, so that the engine body 50 can be automatically and accurately controlled to reach the designated position.

[0043] In some embodiments of the present application, as shown in Figure 2 The roller positioning device 10 further includes a plurality of bottom supports 18. The plurality of bottom supports 18 are arranged on the top of the chassis 11. The top of each bottom support 18 forms a support plane. The mounting rail 12 is provided with a plurality of accommodation holes for mounting the plurality of bottom supports 18. A height adjuster for adjusting the height of the mounting rail 12 is installed between the mounting rail 12 and the chassis 11, and / or a height adjuster for adjusting the height of the bottom support 18 is installed between the bottom support 18 and the chassis 11.

[0044] It should be understood that the height adjuster can be arranged between the mounting rail 12 and the chassis 11 or between the bottom support 18 and the chassis 11, or two height adjusters can be arranged between the mounting rail 12 and the chassis 11 and between the bottom support 18 and the chassis 11, respectively. The height adjuster includes, but is not limited to, a jacking cylinder and the like.

[0045] In the embodiment, when the engine body 50 reaches the specified position on the top of the chassis 11, the height of the mounting rail 12 and / or the base support 18 can be adjusted by the height adjuster, so that the support plane of the base support 18 is in contact with and bears against the bottom of the engine body 50, and the support of the engine body 50 by the rollers 13 is changed to the support by the base support 18, thereby making the positioning of the engine body 50 on the top of the chassis 11 more stable.

[0046] Further, the number of the base supports 18 in the embodiment includes but is not limited to two, three or four, and when the mounting rail 12 is provided with two or more, preferably four base supports 18 can be used, which form a four-point support for the engine body 50 in a rectangular shape.

[0047] In some embodiments of the utility model, as shown in Figure 2 The roller positioning device 10 further includes a position blocking baffle 19, which is installed on the top of the chassis 11 and close to one end of the mounting rail 12.

[0048] In the embodiment, if the engine body 50 moves excessively in the length direction of the mounting rail 12 due to the failure of the deceleration signal sensor 17, the engine body 50 can be blocked by the position blocking baffle 19, so as to avoid the continuous movement of the engine body 50 forward or even falling off the chassis 11, thereby effectively preventing risks.

[0049] Further, after the engine body 50 is blocked by the position blocking baffle 19, a stop signal can be transmitted to the first driving device 14 at the same time, such as through the contact switch linkage control mode, so as to stop the movement of the rollers 13 in time.

[0050] In some embodiments of the utility model, as shown in Figure 1 The blocking device includes two side blocking mechanisms, a top blocking mechanism 22, front and rear end blocking mechanisms and a bottom blocking mechanism. The two side blocking mechanisms are used for blocking the water holes on the two sides of the engine body 50, the top blocking mechanism 22 is used for blocking the water holes on the top of the engine body 50, the front and rear end blocking mechanisms are used for blocking the water holes on the two ends of the engine body 50, and the bottom blocking mechanism is used for blocking the water holes on the bottom of the engine body 50.

[0051] In the embodiment, according to the structural features of the engine body 50, that is, the characteristics of the distribution of the water holes, the two side blocking mechanisms, the top blocking mechanism 22, the front and rear end blocking mechanisms and the bottom blocking mechanism are respectively arranged, the water holes in each region are blocked in a targeted manner, and the blocking device has higher adaptability and can realize more stable blocking of the water holes.

[0052] In some embodiments of the utility model, as shown in Figure 1 and Figure 3As shown, the two side sealing mechanisms include two side sealing assemblies 21, which are arranged symmetrically above the roller positioning device 10 and on both sides of the roller positioning device 10, and are used for sealing the water holes on the corresponding side of the engine body 50.

[0053] As shown in the figure, Figure 3 The side sealing assembly 21 includes a sealing plate 211, a rubber ring 212 and a third driving device 213. The sealing plate 211 is arranged on one side of the corresponding side of the engine body 50 and is parallel to the surface of the corresponding side of the engine body 50. The rubber ring 212 is arranged on the side of the sealing plate 211 facing the engine body 50, and the number and shape of the rubber ring 212 are configured according to the water holes on the surface of the corresponding side of the engine body 50. The third driving device 213 is used to drive the sealing plate 211 to move towards the surface of the corresponding side of the engine body 50, so that the rubber ring 212 seals the water holes.

[0054] It should be noted that in the present application, the angle of the sealing plate 211 relative to the chassis 11 is arranged according to the type of the engine body 50. For example, the side surface of the V-type engine body 50 is inclined, and the sealing plate 211 is arranged inclined to the chassis 11.

[0055] In some embodiments of the present application, the third driving device 213 includes but is not limited to an electric push rod, a linear motor, a cylinder and other linear driving mechanisms.

[0056] In some embodiments of the present application, as shown in the figure, Figure 3 The side sealing assembly 21 further includes a fixing frame 214 arranged above the chassis 11. The bottom of the fixing frame 214 is provided with a mounting surface perpendicular to the surface of the corresponding side of the engine body 50. The third driving device 213 is mounted on the mounting surface through a first linear guide rail 215, which is arranged parallel to the mounting surface and perpendicular to the surface of the corresponding side of the engine body 50. The mounting surface is further provided with a fourth driving device for driving the third driving device 213 to slide on the first linear guide rail 215.

[0057] In this embodiment, according to the type and specification of the engine body 50, when the engine body 50 reaches the designated position on the top of the chassis 11, the position of the third driving device 213 and the sealing plate 211 can be adjusted by the fourth driving device, so that the movement direction of the third driving device 213 driving the sealing plate 211 is adapted to the water holes on the corresponding engine body 50, thereby adapting to more types of engine bodies 50.

[0058] In some embodiments of the present application, the fourth driving device includes but is not limited to an electric push rod, a linear motor, a cylinder and other linear driving mechanisms.

[0059] In some embodiments of the present application, as shown in Figure 3 The side plugging assembly 21 further comprises a positioning rod 216, and the engine body 50 is provided with a hole matching the positioning rod 216, the positioning rod 216 is connected to the positioning rod 216 on the side of the engine body 50 through a linear driving mechanism such as an electric push rod, a linear motor or a cylinder, thereby further confirming the position of the engine body 50 to ensure that the plugging plate 211 accurately plugs the water hole.

[0060] In some embodiments of the present application, as shown in Figure 3 The top plugging mechanism 22 comprises a plurality of upper plugging heads 221 and a plurality of fifth driving devices 222, the plurality of upper plugging heads 221 correspond to the water holes on the top of the engine body 50 one by one, and the plurality of fifth driving devices 222 correspond to the plurality of upper plugging heads 221 one by one, each fifth driving device 222 is used for driving the corresponding upper plugging head 221 to plug the corresponding water hole.

[0061] It should be noted that in the present application, the fifth driving device 222 drives the upper plugging head 221 to move in a corresponding direction according to the type of the engine body 50; for example, the water holes on the top of the engine body 50 of a V-type engine are divided into two rows, and the planes where the two rows of water holes are located are V-shaped, that is, the two groups of fifth driving devices 222 corresponding to the two rows of water holes are arranged in a cross shape, and the movement direction of the fifth driving device 222 driving the corresponding upper plugging head 221 is perpendicular to the plane where the corresponding water hole is located.

[0062] In some embodiments of the present application, the fifth driving device 222 includes but is not limited to an electric push rod, a linear motor, a cylinder or other linear driving mechanism.

[0063] In some embodiments of the present application, as shown in Figure 3 The upper plugging head 221 and the fifth driving device 222 are connected through a spring 223, the compression direction of the spring 223 is the same as the movement direction of the fifth driving device 222 driving the upper plugging head 221, and a guide rod is further arranged between the upper plugging head 221 and the fifth driving device 222 to position the compression direction of the spring 223.

[0064] In this embodiment, the fifth driving device 222 drives the upper plugging head 221 to be embedded into the water hole on the top of the engine body 50, at this time the fifth driving device 222 continues to be elongated, and the spring 223 between the fifth driving device 222 and the upper plugging head 221 is squeezed, so that the upper plugging head 221 realizes complete plugging and sealing of the water hole on the top of the engine body 50.

[0065] In some embodiments of the present application, as shown in Figure 3As shown, the plurality of fifth driving devices 222 can be jointly installed on a bottom plate 224, the bottom plate 224 is located above the chassis 11, a fixed seat 225 is arranged above the bottom plate 224, and the bottom plate 224 and the fixed seat 225 are connected through a plurality of vertically arranged cylindrical guide rails 226, and the bottom plate 224 and the fixed seat 225 are connected through a sixth driving device 227.

[0066] In the present application, according to the different types and specifications of the engine block 50, when the engine block 50 reaches the specified position on the top of the chassis 11, the height of the bottom plate 224 can be adjusted through the sixth driving device 227, so that the movement direction of the fifth driving device 222 driving the upper blocking head 221 is adapted to the water hole on the corresponding engine block 50, thereby adapting to more types of engine blocks 50.

[0067] In some embodiments of the present application, the sixth driving device 227 includes but is not limited to an electric push rod, a linear motor, a cylinder and the like linear driving mechanism.

[0068] In some embodiments of the present application, as shown in Figure 1 and Figure 4 As shown, the front and rear end blocking mechanism includes four end blocking assemblies 23, the four end blocking assemblies 23 are respectively close to the four end corners of the roller positioning device 10, and the four end blocking assemblies 23 are respectively used for blocking the water hole at the corresponding end corner of the engine block 50.

[0069] As shown in Figure 4 , the end blocking assembly 23 includes an end blocking head 231 and a seventh driving device 232, the seventh driving device 232 is used for driving the end blocking head 231 to block the water hole at the corresponding end corner of the engine block 50.

[0070] In some embodiments of the present application, the seventh driving device 232 includes but is not limited to an electric push rod, a linear motor, a cylinder and the like linear driving mechanism.

[0071] In some embodiments of the present application, as shown in Figure 4 , the end blocking assembly 23 further includes a stand column 233, the top of the stand column 233 is provided with a fixed plate 234, the fixed plate 234 is provided with a movable plate 235 which is slidably connected with the fixed plate 234 along the width direction of the engine block 50, the seventh driving device 232 is assembled on the movable plate 235, and the fixed plate 234 is further provided with an eighth driving device 236 for driving the movable plate 235 to slide.

[0072] In the present application, according to the different types and specifications of the engine block 50, when the engine block 50 reaches the specified position on the top of the chassis 11, the eighth driving device 236 can adjust the position of the seventh driving device 232 and the end plug 231, so that the seventh driving device 232 drives the end plug 231 to adapt to the movement direction of the water hole at the corresponding end angle on the corresponding engine block 50, thereby adapting to more types of engine blocks 50.

[0073] In some embodiments of the present application, the eighth driving device 236 can adopt gear and rack transmission, chain transmission or belt transmission driven by a motor, or adopt a linear driving mechanism including but not limited to an electric push rod, a linear motor, a cylinder, etc.

[0074] In some embodiments of the present application, as shown in Figure 1 and Figure 4 The bottom sealing mechanism includes two lower sealing assemblies 24, which are arranged on both sides of the roller positioning device 10, and are respectively used for sealing the water holes at the bottom of the corresponding side of the engine block 50.

[0075] As shown in Figure 4 The lower sealing assembly 24 includes a lower sealing head 241 and a ninth driving device 242, which is used for driving the lower sealing head 241 to seal the water holes at the bottom of the corresponding side of the engine block 50.

[0076] In some embodiments of the present application, the ninth driving device 242 can adopt gear and rack transmission, chain transmission or belt transmission driven by a motor, or adopt a linear driving mechanism including but not limited to an electric push rod, a linear motor, a cylinder, etc.

[0077] In some embodiments of the present application, as shown in Figure 4 The water injection mechanism 30 includes a water injection channel 31 and a water outlet channel 32. The water injection channel 31 is arranged on one side of the roller positioning device 10, and is used for sealingly connecting with the water inlet hole of the engine block 50 and injecting water into the cooling liquid cavity; the water outlet channel 32 is arranged on the other side of the roller positioning device 10, and is used for sealingly connecting with the water outlet hole of the engine block 50 and discharging water from the cooling liquid cavity after the test is completed.

[0078] In the present embodiment, when the engine block 50 reaches the specified position on the top of the chassis 11, the water injection channel 31 and the water outlet channel 32 are connected with the water inlet hole and the water outlet hole of the engine block 50 respectively, then water is injected into the cooling liquid cavity using the water injection channel 31, and after waiting for the test to be completed, it is detected whether the engine block 50 leaks and the accurate position of water leakage in the case of leakage, and then the water is discharged through the water outlet channel 32.

[0079] In some embodiments of the utility model, water injection channel 31 and water outlet channel 32 can be docked or undocked with water inlet hole and water outlet hole through tenth driving device 33.

[0080] In some embodiments of the utility model, tenth driving device 33 includes but is not limited to electric push rod, linear motor, cylinder and other linear driving mechanisms.

[0081] In some embodiments of the utility model, as shown in Figure 4 Water injection mechanism 30 also includes two second linear guide rails 34, and water injection channel 31 and water outlet channel 32 are connected with roller positioning device 10 through second linear guide rail 34 respectively, and second linear guide rail 34 is parallel to the length direction of roller positioning device 10.

[0082] In the application, according to the different types and specifications of engine body 50, when engine body 50 reaches the specified position on the top of chassis 11, the position of water injection channel 31 and water outlet channel 32 along the length direction of chassis 11 can be adjusted through second linear guide rail 34, so that water injection channel 31 and water outlet channel 32 are aligned with water inlet hole and water outlet hole of different engine bodies 50, to adapt to more types of engine bodies 50.

[0083] In some embodiments of the utility model, as shown in Figure 4 Water injection channel 31 and water outlet channel 32 are respectively provided with one at multiple positions.

[0084] By respectively providing water injection channel 31 and water outlet channel 32 at multiple positions in the three-dimensional space, more types of engine bodies 50 can be aligned with water inlet hole and water outlet hole, further improving the applicability.

[0085] Further, multiple water injection channels 31 can be installed on the same or different second linear guide rails 34 for position adjustment, and multiple water outlet channels 32 can be installed on the same or different second linear guide rails 34 for position adjustment.

[0086] In some embodiments of the utility model, as shown in Figure 1 And Figure 4 Water tightness test device also includes general control regulator 40, and general control regulator 40 is connected with roller positioning device 10, plugging device and water injection mechanism 30 through signal data line 41 respectively.

[0087] In the embodiment, when a part of the watertight test device fails during the watertight test, the total control regulator 40 can be reset manually, and the control signal is transmitted to the failure part through the signal data line 41 to adjust the corresponding process.

[0088] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An engine block water tightness testing device suitable for use with an engine block having a cooling liquid chamber formed therein, the surface of the engine block having a water hole, a water inlet hole and a water outlet hole formed therein in communication with the cooling liquid chamber, characterized by, The water tightness testing device comprises: a roller positioning device (10) for carrying and positioning the engine body; a blocking device arranged beside the roller positioning device (10) for blocking the water holes of the engine body; a water injection mechanism (30) arranged beside the roller positioning device (10) for blocking the water inlet and outlet holes of the engine body and injecting water into the cooling liquid cavity through the water inlet hole.

2. The water tightness testing apparatus according to claim 1, wherein The roller positioning device (10) comprises: a chassis (11); a mounting rail (12) mounted on the top of the chassis (11); a plurality of rollers (13) mounted on the mounting rail (12) along the length direction of the mounting rail (12), the axis of the roller (13) being perpendicular to the length direction of the mounting rail (12) and parallel to the upper surface of the chassis (11), the upper top of the plurality of rollers (13) being flush with each other and higher than the upper surface of the mounting rail (12); a first driving device (14) for driving at least one of the plurality of rollers (13) to rotate; a positioning pin (15) mounted on the chassis (11) for sliding insertion into a positioning hole on the engine body, the positioning hole being adapted to the positioning pin (15).

3. The water tightness testing apparatus according to claim 2, wherein The roller positioning device (10) further comprises: a position detection sensor (16) mounted on the top of the mounting rail (12) for real-time detection of the motion state and position of the engine body; a deceleration signal sensor (17) mounted on the top of the mounting rail (12) for sending a deceleration signal to the first driving device (14) when the engine body is detected to pass.

4. The water tightness testing apparatus according to claim 2, wherein The roller positioning device (10) further comprises: a plurality of bottom supports (18) arranged on the top of the chassis (11), the top of the bottom support (18) being formed with a support plane, and the mounting rail (12) being provided with a clearance hole for mounting each bottom support (18); a height adjuster mounted between the mounting rail (12) and the chassis (11) for adjusting the height of the mounting rail (12), and / or a height adjuster mounted between the bottom support (18) and the chassis (11) for adjusting the height of the bottom support (18).

5. The water tightness testing apparatus according to claim 2, wherein The roller positioning device (10) further comprises: a position blocking baffle (19) mounted on the top of the chassis (11) near one end of the mounting rail (12).

6. The water tightness testing apparatus according to claim 1, wherein The blocking device comprises: a two-side blocking mechanism for blocking the water holes on both sides of the engine body; a top blocking mechanism (22) for blocking the water holes on the top of the engine body; a front and rear end blocking mechanism for blocking the water holes on both ends of the engine body; a bottom blocking mechanism for blocking the water holes on the bottom of the engine body.

7. The water tightness testing apparatus according to claim 1, wherein The water injection mechanism (30) comprises: a water injection channel (31) arranged on one side of the roller positioning device (10) for airtight connection with the water inlet hole of the engine body and for injecting water into the cooling liquid cavity; A water outlet channel (32) is arranged on the other side of the roller positioning device (10) and is used to seal and connect with the water outlet hole of the engine block and to drain the water in the cooling liquid cavity after the test is completed.

8. The water tightness testing apparatus according to claim 7, wherein The water injection channel (31) and the water outlet channel (32) are respectively connected with the roller positioning device (10) through a second linear guide rail (34) parallel to the length direction of the roller positioning device (10).

9. The water tightness testing apparatus according to claim 8, wherein The water injection channel (31) and the water outlet channel (32) are respectively provided with one at each position.

10. The water tightness testing device according to any one of claims 1 to 9, wherein Further comprising: A general control regulator (40) is connected with the roller positioning device (10), the sealing device and the water injection mechanism (30) through a signal data line (41).

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