Cylinder head leak tester

Abstract

The invention discloses a cylinder head leak tester, comprising a detection device and a frame, wherein the frame is located at the front side of the detection device, a positioning fixture for positioning the cylinder head is slidable forward and backward in the middle of the frame, a lifting mechanism I capable of driving the positioning fixture to rise and fall is provided below, a bottom sealing plate capable of blocking the water channel openings of the lower end face of the cylinder head is provided at the inner bottom of the positioning fixture, an air supply mechanism, a detection chamber and a liftable water tank are provided in the detection device from top to bottom, a slide rail I for sliding the positioning fixture is provided on both sides of the detection chamber along the front-back direction, a left sealing mechanism for blocking the oil channel opening of the cylinder head is installed in the detection chamber on the left side, a lifting plate is installed above, and an upper sealing member and a front sealing mechanism connected to the air supply mechanism are installed at the lower end of the lifting plate. In this way, it can adapt to cylinder heads of various specifications, expand the detection range, and has a simple process, saves time and labor, and improves the detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of cylinder head air tightness detection, in particular to a cylinder head leak tester. Background Art

[0002] With the rapid development of the machinery industry, cylinder heads are used more and more frequently in the industry. During the production process of cylinder heads, the cylinder heads are often tested for air tightness. The current traditional test is to assemble the cylinder head with the cylinder, and after the assembly is completed, block the other holes and leave one hole for water injection to perform a leak test. This is extremely cumbersome, which reduces production efficiency and is inconvenient to use. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides a cylinder head leak testing machine.

[0004] A cylinder head leak tester proposed in the present invention comprises a detection device and a frame, the frame is located at the front side of the detection device, a positioning fixture for positioning the cylinder head is slidable forward and backward in the middle part of the frame, a lifting mechanism I is provided at the bottom which can drive the positioning fixture to rise and fall, the inner bottom of the positioning fixture is provided with a bottom sealing plate which can block the various water channel cavities on the lower end face of the cylinder head, an air supply mechanism, a detection chamber and a liftable water tank are provided in the detection device from top to bottom, the detection chamber is provided with slide rails I for the sliding of the positioning fixture on both sides along the front-to-back direction, a left side sealing mechanism for blocking the oil channel water channel opening of the cylinder head is installed in the left side of the detection chamber, a lifting plate is installed at the top, an upper sealing member and a front side sealing mechanism connected to the air supply mechanism are installed at the lower end of the lifting plate, the upper sealing member is used to block the upper oil port of the cylinder head and inflate the upper oil port, the front side sealing mechanism is used to block the exhaust side water channel opening and the water inlet opening on the front side of the cylinder head, and can inflate the water inlet opening.

[0005] Preferably, the left side sealing mechanism comprises:

[0006] The left sealing plate has a left plug on its inner side which can seal the oil and water channel openings of the cylinder head;

[0007] The output end of the left cylinder is fixed to the outer side of the left sealing plate, driving the left sealing plate to move left and right to approach or move away from the left side of the cylinder head.

[0008] Preferably, the upper end of the lifting plate is connected to the output end of a lifting cylinder, and the lifting cylinder is fixed on the top of the detection device.

[0009] Preferably, the upper sealing member is configured as a hard inflation tube I, and the end of the hard inflation tube I is interference fit with the oil port at the upper end of the cylinder head.

[0010] Preferably, the front side sealing mechanism comprises:

[0011] A front sealing plate, the inner side of which is provided with a front plug capable of sealing the exhaust side water channel opening on the front side of the cylinder head and a hard air charging pipe II for interference fit with the water inlet opening;

[0012] The front cylinder has an output end fixed to the outer side of the front sealing plate, driving the front sealing plate to move forward and backward to approach or move away from the front side of the cylinder cover.

[0013] Preferably, it also includes a control device, which is communicatively connected to the air supply mechanism, the lifting mechanism I, the left side sealing mechanism, the lifting cylinder, the front side sealing mechanism, and the liftable water tank.

[0014] Preferably, the control device is configured as a PLC controller.

[0015] Preferably, a light curtain sensor and a safety door lock are installed at the entrance of the detection room.

[0016] Preferably, a U-shaped handle is provided on the front side of the positioning fixture.

[0017] In summary, the present invention has the following beneficial effects: first, the cylinder head to be tested is placed in the positioning fixture, and each water channel cavity on the lower end surface of the cylinder head is sealed by the bottom sealing plate in the positioning fixture, and then the positioning fixture with the cylinder head positioned is slid into the detection chamber through the slide rail I, and then the upper sealing member, the left sealing mechanism and the front sealing mechanism are used to seal each channel opening of the cylinder head that needs to be sealed, and the lifting water tank is controlled to rise, and then the upper oil port of the cylinder head and the water inlet are inflated by the air supply mechanism, and whether bubbles are generated in the water. If no bubbles are generated, the air tightness is good. In this way, the air tightness test of the water channel and the oil channel of the cylinder head is completed. In this way, it can adapt to cylinder heads of various specifications, expand the detection range, and the process is simple, time-saving and labor-saving, and the detection efficiency is improved.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a cylinder head leak tester in which a liftable water tank is located below a detection chamber in an embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a cylinder head leak tester in which a liftable water tank is located in a detection chamber in an embodiment of the present invention.

[0021] In the figure:

[0022] 1. Frame; 2. Positioning fixture; 3. Cylinder head; 4. Lifting mechanism Ⅰ; 5. Detection device; 51. Detection chamber; 6. Liftable water tank; 7. Slide rail Ⅰ; 8. Lifting cylinder; 9. Left side sealing mechanism; 10. Lifting plate; 11. Front side sealing mechanism; 12. U-shaped handle; 13. Air cylinder; 14. Safety door. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] like Figure 1-2 As shown, a cylinder head leak tester proposed in this embodiment includes a detection device 2 and a frame 1. The frame 1 is located at the front side of the detection device 5. A positioning fixture 2 for positioning the cylinder head 3 is slidable forward and backward in the middle of the frame 1. A lifting mechanism Ⅰ4 capable of driving the positioning fixture 2 to rise and fall is provided below. A bottom sealing plate capable of blocking each water channel cavity opening on the lower end surface of the cylinder head 3 is provided at the inner bottom of the positioning fixture 2. An air supply mechanism, a detection chamber 51 and a liftable water tank 6 are provided in the detection device 5 from top to bottom. The detection chamber 51 Slide rails Ⅰ7 for sliding the positioning fixture are provided on both sides along the front-to-back direction. A left-side sealing mechanism 9 for sealing the oil and water channel openings of the cylinder head 3 is installed on the left side of the detection chamber 51, and a lifting plate 10 is installed on the top. An upper sealing member and a front side sealing mechanism 11 connected to the air supply mechanism are installed at the lower end of the lifting plate 10. The upper sealing member is used to seal the upper oil port of the cylinder head 3 and inflate the upper oil port. The front side sealing mechanism 11 is used to seal the exhaust side water channel opening and the water inlet opening on the front side of the cylinder head 3, and can inflate the water inlet opening.

[0025] Specifically, a slide rail II extending in the front-rear direction is provided in the middle of the frame 1, and the positioning fixture 2 can slide on the slide rail II in the front-rear direction.

[0026] The upper end of the lifting plate 10 is connected to the output end of the lifting cylinder 8 , and the lifting cylinder 8 is fixed on the top of the detection device 5 . The lifting cylinder 8 controls the up and down movement of the lifting plate 10 .

[0027] At the same time, the lifting and lowering of the liftable water tank 6 can also be controlled by a cylinder or an electric cylinder or a motor screw nut mechanism, etc., and the specific structure of the lifting mechanism Ⅰ4 also refers to the existing structure, and this article will not repeat it.

[0028] It should be noted that, in order to facilitate pushing the positioning fixture 2 with the cylinder head 3 positioned thereon to the detection chamber 51 , a U-shaped handle 12 is provided on the front side of the positioning fixture 2 .

[0029] In this way, firstly, the cylinder head 3 to be tested is placed in the positioning fixture 2, and the water channel cavity openings on the lower end surface of the cylinder head 3 are blocked by the bottom sealing plate in the positioning fixture 2. Then, the position of the positioning fixture 2 is adjusted by the up and down movement of the lifting mechanism Ⅰ4, so that the positioning fixture 2 is highly aligned with the slide rails Ⅰ7 on both sides of the detection chamber 51, and then the positioning fixture 2 with the cylinder head 3 positioned is slid to the detection position in the detection chamber 51 through the slide rails Ⅰ7. At this time, the lifting plate 10 is controlled to move downward, so that the upper sealing piece is pressed down to block the oil port on the upper end of the cylinder head 3, and at the same time, the front side sealing mechanism 11 is driven to descend to the cylinder head. 3, control the left sealing mechanism 9 to act to block the oil and water channel openings of the cylinder head 3; at the same time, control the front side sealing mechanism 11 to act to block the exhaust side water channel openings and water inlet openings on the front side of the cylinder head 3. After the sealing work of each opening of the cylinder head 3 is completed, control the liftable water tank 6 to rise until the cylinder head 3 is located in the liftable water tank 6, and finally start the air supply mechanism to inflate the oil port at the upper end of the cylinder head 3 and the water inlet opening, respectively, and observe whether there are bubbles in the water. If no bubbles are generated, the air tightness is good. After the test is completed, the cylinder head 3 is exhausted. In this way, the air tightness test of the water and oil channels of the cylinder head 3 is completed. In this way, it can adapt to cylinder heads of various specifications, expand the detection range, and the process is simple, time-saving and labor-saving, and the detection efficiency is improved.

[0030] Further, the left side sealing mechanism 9 comprises:

[0031] The left sealing plate has a left plug on its inner side which can seal the oil and water channel openings of the cylinder head 3;

[0032] The output end of the left cylinder is fixed to the outer side of the left sealing plate, driving the left sealing plate to move left and right to approach or move away from the left side of the cylinder head 3.

[0033] It should be noted that the driving mechanism of the left sealing plate in the left sealing mechanism 9 can also be a motor and a screw nut mechanism.

[0034] In this embodiment, the upper sealing member is a hard inflation tube I (not shown in the figure), and the end of the hard inflation tube I is interference fit with the upper oil port of the cylinder head 3. It can play a blocking role and inflate the upper oil port at the same time.

[0035] Further, the front side sealing mechanism 11 comprises:

[0036] A front sealing plate, the inner side of which is provided with a front plug capable of sealing the exhaust side water channel opening on the front side of the cylinder head 3 and a hard air charging pipe II for interference fit with the water inlet opening;

[0037] The output end of the front cylinder is fixed to the outer side of the front sealing plate, driving the front sealing plate to move forward and backward to approach or move away from the front side of the cylinder head 3.

[0038] It should be noted that the driving mechanism of the front side sealing plate in the front side sealing mechanism 11 can also be a motor and a screw nut mechanism.

[0039] Furthermore, the air supply mechanism includes an air cylinder 13 and an air pump fixed at the upper end of the detection device 5, and two air cylinders 13 and two air pumps are respectively provided, one of which is used to inflate the upper oil port; and the other air cylinder 13 and air pump are used to inflate the water inlet.

[0040] In this embodiment, in order to facilitate the operator's control, a control device is also included, and the control device is communicatively connected with the air supply mechanism, the lifting mechanism I4, the left sealing mechanism 9, the lifting cylinder 8, the front sealing mechanism 11, and the liftable water tank 6. Specifically, the control device is set as a PLC controller, which can automatically complete a series of operations such as clamping, sealing, inflating, testing, and exhausting of the cylinder head according to a preset program, greatly improving the detection efficiency and reducing labor costs and labor intensity.

[0041] At the same time, the PLC controller can record and store test data and establish a database to facilitate the query and tracing of historical test results, providing data support for product quality analysis and improvement.

[0042] Furthermore, a light curtain sensor and a safety door lock are installed at the entrance of the detection room 51, wherein a safety door 14 may also be provided on the front side of the detection room 51, the safety door lock is installed on the safety door 14, and the light curtain sensor is installed above the safety door 14. When a person approaches or the machine operates abnormally, the light curtain sensor will sense human body signals or other abnormal signals and transmit the signals to the PLC controller. The PLC controller controls the detection work to stop running quickly, thereby ensuring the safety of the operator.

[0043] It should be noted that the cylinder head leak tester in this embodiment can also be provided with functions such as overload protection and leakage protection to prevent safety accidents caused by equipment failure, thereby improving the reliability and stability of the equipment. Specifically, the specific measures for overload protection and leakage protection can refer to the existing structure, such as installing a leakage protector, etc., and will not be repeated in this article.

[0044] Preferably, each plug of the bottom sealing plate, the left sealing plate, the front sealing plate and the upper sealing member can also be combined with high-precision sealing members such as O-rings and gaskets to seal the cylinder head to ensure that the cylinder head is leak-free during the leak test and improve the detection accuracy.

[0045] It should be noted that in the present embodiment, the cylinder head can be sealed in a variety of ways, such as mechanical sealing, hydraulic sealing, etc. For details, please refer to the existing structure, and this article will not repeat them.

[0046] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cylinder head leak tester, comprising a detection device and a frame, characterized in that: The frame is located at the front side of the detection device, and a positioning fixture for positioning the cylinder head is slid forward and backward in the middle part of the frame, and a lifting mechanism I is provided at the bottom to drive the positioning fixture to rise and fall. The inner bottom of the positioning fixture is provided with a bottom sealing plate that can block the various water channel cavities on the lower end face of the cylinder head. The detection device is provided with an air supply mechanism, a detection chamber and a liftable water tank from top to bottom, and the detection chamber is provided with slide rails I for the sliding of the positioning fixture on both sides along the front and rear directions. A left sealing mechanism for blocking the oil channel water channel opening of the cylinder head is installed on the left side of the detection chamber, and a lifting plate is installed on the top. The lower end of the lifting plate is provided with an upper sealing member and a front side sealing mechanism connected to the air supply mechanism, the upper sealing member is used to block the upper oil port of the cylinder head and inflate the upper oil port, and the front side sealing mechanism is used to block the exhaust side water channel opening and the water inlet opening on the front side of the cylinder head, and can inflate the water inlet opening.

2. The cylinder head leak tester according to claim 1, characterized in that: The left side sealing mechanism comprises: The left sealing plate has a left plug on its inner side which can seal the oil and water channel openings of the cylinder head; The output end of the left cylinder is fixed to the outer side of the left sealing plate, driving the left sealing plate to move left and right to approach or move away from the left side of the cylinder head.

3. The cylinder head leak tester according to claim 1, characterized in that: The upper end of the lifting plate is connected to the output end of the lifting cylinder, and the lifting cylinder is fixed on the top of the detection device.

4. The cylinder head leak tester according to claim 3, characterized in that: The upper sealing member is configured as a hard inflation tube I, and the end of the hard inflation tube I is interference fit with the oil port at the upper end of the cylinder head.

5. The cylinder head leak tester according to claim 3, characterized in that: The front side sealing mechanism comprises: A front sealing plate, the inner side of which is provided with a front plug capable of sealing the exhaust side water channel opening on the front side of the cylinder head and a hard air charging pipe II for interference fit with the water inlet opening; The front cylinder has an output end fixed to the outer side of the front sealing plate, driving the front sealing plate to move forward and backward to approach or move away from the front side of the cylinder cover.

6. The cylinder head leak tester according to claim 3, characterized in that: It also includes a control device, which is communicatively connected to the air supply mechanism, the lifting mechanism I, the left side sealing mechanism, the lifting cylinder, the front side sealing mechanism, and the liftable water tank.

7. The cylinder head leak tester according to claim 6, characterized in that: The control device is configured as a PLC controller.

8. The cylinder head leak tester according to claim 1, characterized in that: A light curtain sensor and a safety door lock are installed at the entrance of the detection room.

9. The cylinder head leak tester according to claim 1, characterized in that: A U-shaped handle is provided on the front side of the positioning fixture.

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