Error-proofing device

Abstract

The utility model relates to a mistake proofing device, which belongs to the technical field of volute detection, and comprises a test seat, the bottom of the test seat is provided with a first annular groove, a second annular groove and a blind hole, the blind hole, the second annular groove and the first annular groove are arranged from inside to outside, and the first annular groove and the second annular groove are distributed at intervals. A first annular groove and a second annular groove are formed in the testing seat, a first sealing piece is installed in the first annular groove, a second sealing piece is installed in the second annular groove, an air hole is formed in one side of the testing seat, and a testing pipe is arranged at the outer end of the air hole. When the pressure air between the first air channel and the second air channel can circulate and the air pressure value detected by the signaling device is within the set range, it is judged that the volute is provided with a pin hole, and when the pressure air between the first air channel and the second air channel cannot circulate and the air pressure value detected by the signaling device is not within the set range, it is judged that the volute is provided with a pin hole; the detection function of the pin hole in the volute is realized.

Description

Technical Field

[0001] The utility model relates to an error-proofing device and belongs to the technical field of volute detection. Background Art

[0002] At present, many cars use engines with turbocharger structures. Turbochargers are actually a kind of air compression. They use the inertia of exhaust gas discharged by the engine to drive the turbine. The turbine drives the coaxial impeller. The impeller presses the air sent from the air filter pipe to make it pressurized and enter the cylinder. The volute casing is one of the important parts of the turbocharger. During the production process, the volute casing needs to be tested for leakage through a measuring device.

[0003] The invention patent with publication number CN108151983A discloses a volute assembly leakage detection mechanism, including a bottom plate, a fixed seat connected to the bottom plate, a positioning core fixedly connected to the fixed seat, and a directional component arranged on the fixed seat, a through hole is opened in the center of the positioning core along the vertical direction, a pull rod is arranged in the through hole so as to be movable up and down, a pull rod head is connected to the top of the pull rod, a top plate is connected to the bottom plate, an upper pressure cover is connected to the top plate so as to be movable up and down, a first air hole is opened on the upper pressure cover, a side pressure cover is connected to the bottom plate so as to be movable horizontally, a second air hole is opened on the side pressure cover, and a top pressure component for preventing the valve cover of the volute assembly from opening is also arranged on the top plate. The invention has the characteristics of simple structure, easy implementation, and low manufacturing cost, and it can not only realize the leakage detection at the gap between the valve stem and the bushing, but also realize the leakage detection at the gap between the exhaust hole and the valve cover surface, thereby meeting the leakage detection requirements. However, when a pin hole needs to be opened at the air outlet end of the volute due to process requirements, it is difficult to detect whether the pin hole has been opened with the existing technology, which may easily lead to outflow of the volute without a pin hole and cause customer complaints.

[0004] Therefore, a kind of error-proofing device is needed to realize the pin hole detection on the volute. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, an error-proofing device for detecting pin holes on a volute is provided.

[0006] The technical solution adopted by the utility model to solve the above-mentioned problem is: an error-proofing device, including a test seat, a first annular groove, a second annular groove and a blind hole are arranged at the bottom of the test seat, the blind hole, the second annular groove and the first annular groove are arranged from the inside to the outside, the first annular groove and the second annular groove are distributed at intervals, a first sealing member is installed in the first annular groove, a second sealing member is installed in the second annular groove, an air hole is provided on one side of the test seat, a test tube is provided at the outer end of the air hole, a signal transmitting device is connected to the test tube, and a first air duct and a second air duct are provided on the test seat.

[0007] Preferably, the first air channel comprises a circular hole, the circular hole is arranged at the bottom of the test seat, the circular hole extends to the air hole, and the circular hole is between the first annular groove and the second annular groove.

[0008] Preferably, the first air channel further includes a third annular groove, which is disposed at the bottom of the test seat, the first annular groove, the third annular groove and the second annular groove are sequentially spaced from outside to inside, and the third annular groove is connected to the circular hole.

[0009] Preferably, the vertical cross-section shape of the third annular groove is V-shaped.

[0010] Preferably, the second air channel comprises a strip groove, the strip groove is arranged on the inner wall of the blind hole, and one end of the strip groove extends to the bottom of the blind hole.

[0011] Preferably, two ends of the strip groove extend to the top and the bottom of the blind hole respectively.

[0012] Preferably, the second air channel further includes a fourth annular groove, which is disposed at the bottom of the test seat, the second annular groove, the fourth annular groove and the blind hole are spaced from outside to inside, and the fourth annular groove is connected to the strip groove.

[0013] Preferably, the vertical cross-section shape of the fourth annular groove is V-shaped.

[0014] Preferably, the first sealing member is a first sealing ring, and the second sealing member is a second sealing ring.

[0015] Preferably, the blind hole is cylindrical, and the axis of the blind hole is arranged vertically.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] The utility model discloses an error-proofing device. A first air passage and a second air passage are arranged on a test seat. When the pressure air between the first air passage and the second air passage can flow, the air pressure value detected by the signaling device is within a set range, and it is determined that a pin hole is provided in the volute. When the pressure air between the first air passage and the second air passage cannot flow, the air pressure value detected by the signaling device is not within the set range, and it is determined that a pin hole is provided in the volute, thereby realizing the pin hole detection function on the volute. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a working state of an error-proofing device of the utility model;

[0019] Figure 2 for Figure 1 Left view of

[0020] Figure 3 for Figure 2 AA direction cross-sectional view;

[0021] Figure 4 is a three-dimensional diagram of the volute;

[0022] Figure 5 for Figure 4 A magnified view of part B;

[0023] Figure 6 This is a three-dimensional diagram of an error-proofing device of the utility model;

[0024] Figure 7 This is a top view of an error-proofing device of the utility model;

[0025] Figure 8 for Figure 7 CC direction cross-sectional view;

[0026] Fig. 9 for Figure 8 A magnified view of the D portion;

[0027] Fig.10 A three-dimensional diagram of the test socket;

[0028] Fig.11 for Fig.11 A magnified view of part E;

[0029] Fig.12 This is a bottom view of the test socket;

[0030] Fig.13 for Fig.12 FF direction cross-sectional view;

[0031] Fig.14 for Fig.13 Enlarged view of the G section.

[0032] in:

[0033] Test seat 1, first annular groove 2, second annular groove 3, blind hole 4, first sealing member 5, second sealing member 6, air hole 7, test tube 8, round hole 9, third annular groove 10, strip groove 11, fourth annular groove 12;

[0034] Volute 100 , connection end 200 , gas outlet end 300 , flange end 400 , boss 500 , pin hole 600 . DETAILED DESCRIPTION

[0035] like Figure 1-14As shown, an error-proofing device in this embodiment includes a test seat 1, a first annular groove 2, a second annular groove 3 and a blind hole 4 are arranged at the bottom of the test seat 1, the blind hole 4 is cylindrical, the axis of the blind hole 4 is arranged vertically, the blind hole 4, the second annular groove 3 and the first annular groove 2 are arranged from the inside to the outside, the first annular groove 2 and the second annular groove 3 are distributed at intervals, a first sealing member 5 is installed in the first annular groove 2, the first sealing member 5 is a first sealing ring, a second sealing member 6 is installed in the second annular groove 3, and the second sealing member 6 is a second sealing ring, an air hole 7 is provided on one side of the test seat 1, a test tube 8 is provided at the outer end of the air hole 7, and a first air channel and a second air channel are provided on the test seat 1, during operation, the air hole 7 is communicated with the pin hole 600 on the volute 100 through the first air channel, and the second air channel is used to connect the pin hole 600 on the volute 100 with the blind hole 4;

[0036] The working steps are as follows:

[0037] First, the connection end 200 of the volute 100 is sealed downwardly and sleeved on the air supply seat for leak detection. The connection end 200 of the volute 100 is sealed and connected to the driving source of the impeller during use. The air supply seat is connected to the air supply system, which can be an air pump. At the same time, the flange end 400 of the volute 100 is sealed by the sealing system, which can be a cylinder and a sealing plate. The sealing plate is driven by the cylinder to fit with the flange end 400 of the volute 100 to achieve sealing of the flange end 400.

[0038] Subsequently, the test seat 1 can be driven up and down by the elevator to move the test seat 1 downward, and the blind hole 4 is sleeved on the air outlet end 300 of the volute 100, and at this time, a gap is provided between the air outlet end 300 of the volute 100 and the inner wall of the blind hole 4. In fact, an annular boss 500 is provided on the outer wall of the air outlet end 300 of the volute 100. After the blind hole 4 is sleeved on the air outlet end 300, the bottom of the test seat 1 fits with the boss 500, and the sealing between the boss 500 and the test seat 1 is achieved by the first sealing ring and the second sealing ring, wherein the pin hole 600 is opened on the fitting surface of the boss 500 and the test seat 1, and at this time, the pin hole 600 is opposite to the second sealing ring and is located on the inner side of the first sealing ring, and the aperture of the pin hole 600 is larger than the groove width of the second annular groove 3;

[0039] Finally, the pressurized air is delivered to the connection end 200 of the volute 100 through the air supply system, the pressurized air in the connection end 200 is delivered to the exhaust end of the volute 100, the pressurized air in the exhaust end is then delivered to the blind hole 4, the pressurized air in the blind hole 4 is delivered to the pin hole 600 from the second air passage, and the pressurized air in the pin hole 600 is then delivered to the air hole 7 from the first air passage. In fact, a signal transmitting device is connected to the test tube 8, and the pressurized air in the air hole 7 is delivered from the test tube 8 to the signal transmitting device, and the air pressure is detected by the signal transmitting device. When the detected air pressure value is within the set range, it is determined that the volute 100 has a pin hole 600, and the subsequent leak detection work is performed;

[0040] On the contrary, when the pin hole 600 is not provided on the volute 100, the pressurized air in the second air passage cannot enter the first air passage through the pin hole 600, that is, the air pressure value detected by the signal transmitting device is not within the set range, and it is determined that the volute 100 does not have the pin hole 600, the volute 100 is unqualified, and the subsequent leak detection work is stopped;

[0041] The first air passage includes a circular hole 9, which is arranged at the bottom of the test seat 1 and extends to the air hole 7. The circular hole 9 is between the first annular groove 2 and the second annular groove 3. During operation, the pressurized air in the pin hole 600 is transported to the circular hole 9, and the pressurized air in the circular hole 9 enters the air hole 7.

[0042] The first air passage also includes a third annular groove 10, which is arranged at the bottom of the test seat 1. The first annular groove 2, the third annular groove 10 and the second annular groove 3 are spaced from the outside to the inside, and the third annular groove 10 is connected to the circular hole 9, wherein the distance between the third annular groove 10 and the second annular groove 3 is less than the radius of the pin hole 600. During operation, the pressurized air in the pin hole 600 is transported from the third annular groove 10 to the circular hole 9, and the pressurized air in the circular hole 9 enters the air hole 7. When the air outlet end 300 of the volute 100 deflects around the axis of the blind hole 4, that is, when the position between the pin hole 600 and the circular hole 9 is offset, the third annular groove 10 can ensure that the pressurized air in the pin hole 600 can be transported to the circular hole 9;

[0043] The second air passage includes a strip groove 11, which is arranged on the inner wall of the blind hole 4, and one end of the strip groove 11 extends to the bottom of the blind hole 4, wherein the other end of the strip groove 11 is located above the volute 100 when it is inserted into the blind hole 4, that is, the other end of the strip groove 11 is located above the air outlet 300 on the volute 100. Of course, the best solution is that the two ends of the strip groove 11 extend to the top and the bottom of the blind hole 4 respectively. When working, the pin hole 600 is connected with the strip groove 11, and the pressure air in the air outlet 300 is transported to the blind hole 4, and the pressure air in the blind hole 4 is transported from the strip groove 11 to the pin hole 600;

[0044] The second air passage also includes a fourth annular groove 12, which is arranged at the bottom of the test seat 1, and the fourth annular groove 12 is located on the inner side of the second annular groove 3, that is, the second annular groove 3, the fourth annular groove 12 and the blind hole 4 are spaced from the outside to the inside, and the fourth annular groove 12 is connected to the strip groove 11, wherein the distance between the fourth annular groove 12 and the second annular groove 3 is less than the radius of the pin hole 600, and the pressurized air in the blind hole 4 is transported from the strip groove 11 to the fourth annular groove 12, and the pressurized air in the fourth annular groove 12 is then transported to the blind hole 4, when the air outlet end 300 of the volute 100 deflects around the axis of the blind hole 4, that is, when the position between the pin hole 600 and the strip groove 11 is offset, the fourth annular groove 12 can ensure that the pressurized air in the pin hole 600 can be transported to the strip groove 11;

[0045] The vertical cross-sectional shapes of the third annular groove 10 and the fourth annular groove 12 are both V-shaped;

[0046] To summarize, by setting the first air duct and the second air duct on the test seat 1, when the pressurized air between the first air duct and the second air duct can flow, the air pressure value detected by the signal transmitting device is within the set range, and it is determined that the vortex casing 100 has a pin hole 600; when the pressurized air between the first air duct and the second air duct cannot flow, the air pressure value detected by the signal transmitting device is not within the set range, and it is determined that the vortex casing 100 has a pin hole 600, thereby realizing the pin hole 600 detection function on the vortex casing 100.

[0047] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An error-proofing device, comprising a test socket (1), characterized in that: The bottom of the test seat (1) is provided with a first annular groove (2), a second annular groove (3) and a blind hole (4); the blind hole (4), the second annular groove (3) and the first annular groove (2) are arranged from the inside to the outside; the first annular groove (2) and the second annular groove (3) are spaced apart; a first sealing member (5) is installed in the first annular groove (2); a second sealing member (6) is installed in the second annular groove (3); an air hole (7) is provided on one side of the test seat (1); a test tube (8) is provided at the outer end of the air hole (7); a signal transmitting device is connected to the test tube (8); and a first air passage and a second air passage are provided on the test seat (1).

2. The error-proofing device according to claim 1, characterized in that: The first air channel comprises a circular hole (9), the circular hole (9) is arranged at the bottom of the test seat (1), the circular hole (9) extends to the air hole (7), and the circular hole (9) is between the first annular groove (2) and the second annular groove (3).

3. The error-proofing device according to claim 2, characterized in that: The first air channel further comprises a third annular groove (10), the third annular groove (10) being arranged at the bottom of the test seat (1), the first annular groove (2), the third annular groove (10) and the second annular groove (3) being spaced apart in sequence from the outside to the inside, and the third annular groove (10) being in communication with the circular hole (9).

4. The error-proofing device according to claim 3, characterized in that: The vertical cross-sectional shape of the third annular groove (10) is V-shaped.

5. The error-proofing device according to claim 1, characterized in that: The second air channel comprises a strip groove (11), wherein the strip groove (11) is arranged on the inner wall of the blind hole (4), and one end of the strip groove (11) extends to the bottom of the blind hole (4).

6. The error-proofing device according to claim 5, characterized in that: Two ends of the strip-shaped groove (11) extend to the top and bottom of the blind hole (4) respectively.

7. An error-proofing device according to claim 5 or 6, characterized in that: The second air channel further comprises a fourth annular groove (12), the fourth annular groove (12) being arranged at the bottom of the test seat (1), the second annular groove (3), the fourth annular groove (12) and the blind hole (4) being spaced apart from the outside to the inside, and the fourth annular groove (12) being in communication with the strip groove (11).

8. The error-proofing device according to claim 7, characterized in that: The vertical cross-sectional shape of the fourth annular groove (12) is V-shaped.

9. The error-proofing device according to claim 1, characterized in that: The first sealing member (5) is a first sealing ring, and the second sealing member (6) is a second sealing ring.

10. The error-proofing device according to claim 1, characterized in that: The blind hole (4) is cylindrical, and the axis of the blind hole (4) is arranged vertically.

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