Leakage testing device for internal leakage of bolt hole of cylinder body and cylinder cover

Abstract

The utility model discloses a cylinder body and cylinder cover bolt hole internal leakage test device, and relates to the technical field of cylinder body leakage test detection. Comprising a fixing frame, a bearing frame is welded and fixed to the bottom of a top plate of the fixing frame, a water tank is arranged below the bearing frame, a high-pressure air pump is installed in the center of the top of the fixing frame, symmetrically-distributed leakage testing mechanisms are connected to the lower portion of the high-pressure air pump, and each leakage testing mechanism comprises an air inlet pipe, a spiral pipe and an air injection head; the heating mechanism comprises a protective shell and an electric heating plate, a sealing mechanism is arranged on the outer side of the air injection head and comprises a sealing block and a sealing air bag, regulation and control mechanisms for controlling the leakage testing mechanism are arranged on the two sides of the high-pressure air pump, and drying mechanisms for drying the cylinder body are arranged on the two sides of the water tank. According to the utility model, the spiral pipe and the heating mechanism are arranged, so that inner leakage testing detection can be carried out on the automobile engine in different temperature environments, the influence of temperature change on the detection result is reduced, and the accuracy and reliability of detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder block leak detection, in particular to an internal leak detection device for cylinder block cylinder head bolt holes. Background Technique

[0002] During the production process of automobile engines, it is necessary to detect the internal leakage of bolt holes in the cylinder block and cylinder head to avoid leakage caused by poor sealing, thereby preventing engine compression loss, coolant or oil leakage.

[0003] In the prior art, an automobile cylinder block leak detection device with the publication number of CN213748945U includes: a water tank; fixed seats, and four fixed seats are respectively fixedly installed at the front and rear ends on the left and right sides of the water tank; first electric push rods, and the first electric push rods are respectively fixedly installed at the top ends of the fixed seats along the up and down direction; connecting rods, and the connecting rods are respectively fixedly installed on the inner sides of the top ends of the first electric push rods along the up and down direction, and the outer walls of the connecting rods are clamped on the inner sides of the inner walls of the water tank; a lifting table, and the lifting table is fixedly installed on the inner side of the bottom end of the connecting rod along the horizontal direction; a placement rack, and the placement rack is fixedly installed at the middle position of the top end of the lifting table; this solution can achieve a semi-automatic leak detection effect, with a smooth process connection, reasonable structural design, reducing the labor intensity of workers and ensuring work efficiency.

[0004] However, there are still some deficiencies in the above solution. For example, there is a large temperature change in the engine before and after operation, and the performance differences of different materials at different temperatures may affect the sealing effect. The above solution only conducts leak detection under a single temperature adjustment, resulting in incomplete detection data and possible misjudgment of leak detection. In view of this, the utility model proposes an internal leak detection device for cylinder block cylinder head bolt holes. Content of the Utility Model

[0005] The purpose of the utility model is to provide an internal leak detection device for cylinder block cylinder head bolt holes to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an internal leak detection device for cylinder block cylinder head bolt holes, including a fixed frame, a bearing frame is fixedly welded to the bottom of the top plate of the fixed frame, a water tank is arranged below the bearing frame, a high-pressure air pump is installed at the center of the top of the fixed frame, a symmetrically distributed leak detection mechanism is connected below the high-pressure air pump, the leak detection mechanism includes an air inlet pipe, a spiral pipe and an air injection head, a heating mechanism is arranged outside the spiral pipe, the heating mechanism includes a protective shell and an electric heating plate, a sealing mechanism is arranged outside the air injection head, the sealing mechanism includes a sealing block and a sealing airbag, a control mechanism for controlling the leak detection mechanism is arranged on both sides of the high-pressure air pump, and a drying mechanism for drying the cylinder block is arranged on both sides of the water tank.

[0007] Preferably, drive seats are welded and fixed on the left and right side walls of the water tank near the top, and symmetrically distributed hydraulic cylinders are installed below the drive seats.

[0008] Furthermore, a tee pipe penetrating the fixing frame is installed at the bottom of the high-pressure air pump, and a pressure gauge is installed on the tee pipe.

[0009] Preferably, one end of the air inlet pipe is connected to the tee pipe. The spiral pipe is installed inside the protective shell and its top end is connected to the other end of the air inlet pipe. The air injection head is installed at the bottom of the protective shell and is connected to the bottom end of the spiral pipe.

[0010] Furthermore, a connecting seat is welded and fixed on the top of the protective shell. A plurality of electric heating plates are evenly distributed in an annular array on the inner and outer sides of the spiral pipe and are in contact with the surface of the spiral pipe. A temperature sensor is installed at the bottom of the protective shell and outside the air injection head.

[0011] Preferably, the sealing block is arranged outside the air injection head. The sealing airbag is arranged at the bottom of the sealing block and is adhesively fixed to the outer surface of the air injection head. An air charging pipe communicating with the sealing airbag is arranged on the right side of the sealing block, and a micro air pump connected to the air charging pipe is installed outside the protective shell.

[0012] Furthermore, the regulation mechanism includes guide rails symmetrically arranged on both sides of the high-pressure air pump. A sliding seat is slidably connected to the inner side of the guide rails. A cylinder is installed on the top of the sliding seat. The piston rod of the cylinder is fixedly connected to the top of the connecting seat. A locking bolt is threadedly connected to the front side of the sliding seat.

[0013] Preferably, the drying mechanism includes an inclined frame installed on the top of the drive seat. A fan is installed on the inclined side of the inclined frame. Arrayed air permeable grooves are formed on the side wall of the inclined frame. An electric heating net is installed inside the inclined frame and near the fan.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] For the internal leakage test leak detection device for the cylinder block and cylinder head bolt holes, by providing a spiral pipe and a heating mechanism, the internal leakage test leak detection of an automobile engine can be carried out in different temperature environments. Through multi-temperature point testing, it is possible to avoid the situation where the leakage of the engine at different temperatures cannot be fully reflected during single-temperature point testing, reduce the influence of temperature change on the detection result, and improve the accuracy and reliability of the detection.

[0016] Meanwhile, by providing a drying mechanism, after the leakage point of the engine block is located through the water tank, hot air flow can be blown outside the engine block through the cooperation of the fan and the electric heating grid, thereby drying the surface of the engine block and avoiding water accumulation on the surface of the engine block. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the leak detection mechanism structure of the present utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the protective shell of the present utility model;

[0020] Figure 4 It is a schematic diagram of the water tank structure of the present utility model;

[0021] Figure 5 It is a schematic diagram of the drying mechanism structure of the present utility model.

[0022] In the figure: 1, fixing frame; 11, carrier frame; 2, water tank; 21, drive seat; 22, hydraulic cylinder; 3, high-pressure air pump; 31, three-way pipe; 32, pressure gauge; 4, intake pipe; 41, spiral pipe; 42, gas injection head; 5, protective shell; 51, connection seat; 52, electric heating plate; 53, temperature sensor; 6, sealing block; 61, sealing airbag; 62, charging pipe; 63, micro air pump; 7, guide rail; 71, sliding seat; 72, cylinder; 73, locking bolt; 8, inclined frame; 81, fan; 82, ventilation slot; 83, electric heating grid. Detailed Implementation Modes

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] During the production process of an automotive engine, internal leakage detection needs to be carried out on the bolt holes of the cylinder block and cylinder head to avoid leakage due to poor sealing, thereby preventing engine compression loss, coolant or oil leakage. The leak detection device provided by the present utility model is mainly used for internal leakage detection of automotive engines in different temperature environments. By testing at multiple temperature points, it can avoid the situation where the leakage of the engine at different temperatures cannot be comprehensively reflected during single-temperature-point testing, thereby improving the detection accuracy.

[0025] AsFigures 1 - 5 As shown in the figure, the utility model provides a technical solution: an internal leakage testing device for bolt holes in a cylinder block and a cylinder head, which includes a fixing frame 1. A bearing frame 11 is fixedly welded to the bottom of the top plate of the fixing frame 1. A water tank 2 is arranged below the bearing frame 11. A high-pressure air pump 3 is installed at the center of the top of the fixing frame 1. A leakage testing mechanism is connected below the high-pressure air pump 3. The leakage testing mechanism includes an air inlet pipe 4, a spiral pipe 41 and an air injection head 42. A heating mechanism is arranged outside the spiral pipe 41. The heating mechanism includes a protective shell 5 and an electric heating plate 52. A sealing mechanism is arranged outside the air injection head 42. The sealing mechanism includes a sealing block 6 and a sealing airbag 61. Control mechanisms for controlling the leakage testing mechanism are arranged on both sides of the high-pressure air pump 3. Drying mechanisms for drying the cylinder block are arranged on both sides of the water tank 2.

[0026] When conducting leakage testing, the engine cylinder block is carried to the bearing frame 11 to move the air injection head 42 to the inside of the bolt hole. Then, a seal is made between the air injection head 42 and the bolt hole through the sealing mechanism to prevent gas leakage outside the air injection head 42. Then, high-pressure gas is continuously injected through the high-pressure air pump 3, the air inlet pipe 4, the spiral pipe 41 and the air injection head 42 for leakage testing. Then, through the cooperation of the heating mechanism and the spiral pipe 41, the input air is heated to control the high-pressure air at different temperature points for leakage testing, avoiding the influence of performance differences of different materials at different temperatures on the leakage detection results, and thus improving the detection accuracy.

[0027] As Figure 2 and Figure 3 shown, a three-way pipe 31 penetrating the fixing frame 1 is installed at the bottom of the high-pressure air pump 3. A pressure gauge 32 is installed on the three-way pipe 31. The gas pressure can be monitored during the detection through the pressure gauge 32. If the gas pressure continuously decreases, it indicates that

[0028] One end of the air inlet pipe 4 is connected to the three-way pipe 31. The spiral pipe 41 is installed inside the protective shell 5 and its top end is connected to the other end of the air inlet pipe 4. The air injection head 42 is installed at the bottom of the protective shell 5 and is connected to the bottom end of the spiral pipe 41. There is a leakage in the engine cylinder block.

[0029] A connecting seat 51 is fixedly welded to the top of the protective shell 5. A number of electric heating plates 52 are evenly distributed in an annular array on the inner and outer sides of the spiral pipe 41 and are in contact with the surface of the spiral pipe 41. A temperature sensor 53 is installed at the bottom of the protective shell 5 and outside the air injection head 42. The electric heating plates 52 and the spiral pipe 41 are in large-area contact.

[0030] Through the cooperation of the electric heating plate 52 and the spiral pipe 41, the heating area of the air can be increased, the heating efficiency can be improved, and the gas temperature can be monitored through the temperature sensor 53 to facilitate controlling the high-pressure gas at different temperatures for leakage testing.

[0031] The sealing block 6 is arranged on the outer side of the gas injection head 42. The sealing airbag 61 is arranged at the bottom of the sealing block 6 and is adhesively fixed to the outer surface of the gas injection head 42. An air charging pipe 62 communicating with the sealing airbag 61 is arranged on the right side of the sealing block 6. A micro air pump 63 connected to the air charging pipe 62 is installed on the outer side of the protective shell 5.

[0032] The micro air pump 63 can transport gas into the sealing airbag 61, so that the sealing airbag 61 is closely attached to the inside of the cylinder block bolt hole, thereby achieving a good sealing effect on the outer side of the gas injection head 42, further enhancing the detection accuracy, and facilitating the detection of the gas injection head 42 at bolt holes with different inner diameters.

[0033] The regulation mechanism includes guide rails 7 symmetrically arranged on both sides of the high-pressure air pump 3. A sliding seat 71 is slidably connected to the inner side of the guide rail 7. A cylinder 72 is installed on the top of the sliding seat 71. The piston rod of the cylinder 72 is fixedly connected to the top of the connecting seat 51. A locking bolt 73 is threadedly connected to the front side of the sliding seat 71 to fix the sliding seat 71.

[0034] The sliding of the sliding seat 71 along the guide rail 7 can drive the cylinder 72 to move left and right, thereby adjusting the leak detection mechanism left and right. The operation of the cylinder 72 drives the protective shell 5 to move up and down, and the height of the leak detection mechanism can be adjusted to facilitate detection.

[0035] As Figure 4 and Figure 5 shown, driving seats 21 are welded and fixed to the left and right side walls of the water tank 2 near the top. Symmetrically distributed hydraulic cylinders 22 are installed below the driving seats 21.

[0036] The drying mechanism includes an inclined frame 8. The inclined frame 8 is installed on the top of the driving seat 21. A fan 81 is installed on the inclined side of the inclined frame 8. Arrayed air permeable grooves 82 are formed on the side wall of the inclined frame 8. An electric heating grid 83 is installed inside the inclined frame 8 near the fan 81.

[0037] When the air pressure shown by the pressure gauge 32 continues to decrease, it indicates that there is a leak in the engine cylinder block. At this time, the hydraulic cylinder 22 is operated to drive the water tank 2 to move upward, so that the engine cylinder block is immersed in water. By observing the position of the bubbles in the water, the leak point can be quickly located. Then, the water tank 2 is moved downward and separated from the engine cylinder block. Through the mutual cooperation of the fan 81 and the electric heating grid 83, a hot air flow is blown outside the engine cylinder block, and the surface of the engine cylinder block can be dried to avoid water accumulation on the surface of the engine cylinder block.

[0038] Working principle: First, move the engine cylinder block onto the carrier 11. Then, slide the carriage 71 left and right to drive the cylinder 72 to move, and adjust the air injection head 42 above the bolt hole. After that, operate the cylinder 72 to drive the protective shell 5 to move downward, so that the air injection head 42 enters the inner side of the bolt hole. Then, operate the micro air pump 63 to inject air into the sealing airbag 61 through the air charging pipe 62, so that the sealing airbag 61 seals between the air injection head 42 and the inner surface of the bolt hole;

[0039] Further, operate the high-pressure air pump 3 to continuously supply high-pressure air to the engine cylinder block through the air inlet pipe 4, the spiral pipe 41 and the air injection head 42, and judge whether there is leakage by observing the pressure change of the pressure gauge 32. After that, connect the electric heating plate 52 to the power supply. The electric heating plate 52 cooperates with the spiral pipe 41 to detect the air at different temperatures;

[0040] When there is a leakage, operate the hydraulic cylinder 22 to drive the water tank 2 to move upward, so that the engine cylinder block is immersed in water, and locate the leakage point by observing the position of the bubbles in the water. After that, separate the water tank 2 from the engine cylinder block, and make the fan 81 and the electric heating grid 83 cooperate with each other to blow out a hot air flow outside the engine cylinder block to dry the surface of the engine cylinder block.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended embodiments and their equivalents.

Claims

1. A cylinder block and cylinder head bolt hole internal leakage test device, comprising a fixing frame (1), a bearing frame (11) is welded and fixed to the bottom of the top plate of the fixing frame (1), and a water tank (2) is arranged below the bearing frame (11), characterized in that: A high-pressure air pump (3) is installed at the top center of the fixing frame (1), and a symmetrically distributed leak test mechanism is connected below the high-pressure air pump (3), the leak test mechanism comprises an air inlet pipe (4), a spiral tube (41) and an air injection head (42), a heating mechanism is provided on the outer side of the spiral tube (41), the heating mechanism comprises a protective shell (5) and an electric heating plate (52), a sealing mechanism is provided on the outer side of the air injection head (42), the sealing mechanism comprises a sealing block (6) and a sealing air bag (61), regulating mechanisms for controlling the leak test mechanism are provided on both sides of the high-pressure air pump (3), and drying mechanisms for drying the cylinder body are provided on both sides of the water tank (2).

2. The cylinder head bolt hole internal leakage testing device according to claim 1, characterized in that: A driving seat (21) is welded and fixed on the left and right side walls of the water tank (2) near the top, and symmetrically distributed hydraulic cylinders (22) are installed below the driving seat (21).

3. The cylinder head bolt hole internal leakage testing device according to claim 1, characterized in that: A three-way pipe (31) penetrating the fixing frame (1) is installed at the bottom of the high-pressure air pump (3), and a pressure gauge (32) is installed on the three-way pipe (31).

4. The cylinder head bolt hole internal leakage testing device according to claim 1, characterized in that: One end of the air intake pipe (4) is connected to the three-way pipe (31), the spiral pipe (41) is installed on the inner side of the protective shell (5), and the top end is connected to the other end of the air intake pipe (4), and the gas injection head (42) is installed at the bottom of the protective shell (5) and connected to the bottom end of the spiral pipe (41).

5. The cylinder head bolt hole internal leakage testing device according to claim 1, characterized in that: A connecting seat (51) is welded and fixed on the top of the protective shell (5), and a plurality of the electric heating plates (52) are evenly distributed on the inner and outer sides of the spiral tube (41) in a ring array and fit with the surface of the spiral tube (41). A temperature sensor (53) is installed at the bottom of the protective shell (5) and on the outside of the gas injection head (42).

6. The cylinder head bolt hole internal leakage testing device according to claim 1, characterized in that: The sealing block (6) is arranged on the outside of the gas injection head (42), the sealing airbag (61) is arranged at the bottom of the sealing block (6) and is bonded and fixed to the outer surface of the gas injection head (42), an inflation tube (62) connected to the sealing airbag (61) is arranged on the right side of the sealing block (6), and a micro air pump (63) connected to the inflation tube (62) is installed on the outside of the protective shell (5).

7. The cylinder head bolt hole internal leakage testing device according to claim 1, characterized in that: The regulating mechanism comprises guide rails (7) symmetrically arranged on both sides of the high-pressure air pump (3); a slide seat (71) is slidably connected to the inner side of the guide rails (7); a cylinder (72) is installed on the top of the slide seat (71); a piston rod of the cylinder (72) is fixedly connected to the top of the connecting seat (51); and a locking bolt (73) is threadedly connected to the front side of the slide seat (71).

8. The cylinder head bolt hole internal leakage testing device according to claim 1, characterized in that: The drying mechanism comprises an inclined frame (8), the inclined frame (8) being mounted on the top of a driving seat (21), a fan (81) being mounted on the inclined surface side of the inclined frame (8), a ventilation groove (82) distributed in an array being provided on the side wall of the inclined frame (8), and an electric heating network (83) being mounted inside the inclined frame (8) and close to the fan (81).

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