Air tightness detection device for valve production

Abstract

The utility model discloses an air tightness detection device for valve production, which comprises a detection table, the top end of the detection table is fixedly connected with a fixing frame, the top end of the fixing frame is fixedly connected with an electric cylinder, one end of the electric cylinder is connected with the top of an upper sealing cover, and the top end of the detection table is fixedly provided with an engine connecting mold. A sealing detection assembly is arranged on the engine connecting mold; the sealing detection assembly comprises a lower sealing cover fixed to the top end of the engine connecting mold, a to-be-detected valve rod is inserted into the engine connecting mold, the bottom of the fixing frame is in lifting connection with an upper sealing cover, the bottom of the upper sealing cover is of a protruding structure, and an annular groove is formed in the top of the lower sealing cover. The protruding structure is matched with the annular groove structure, the upper sealing cover and the lower sealing cover are spliced to form a sealing structure, and an inflation pump and a pressure gauge are arranged on the upper sealing cover. The device can improve the detection effect of the to-be-detected valve rod, and guarantees the sealing performance of the to-be-detected valve rod after the to-be-detected valve rod and an engine are installed.

Description

Technical Field

[0001] The utility model relates to the technical field of valve production, in particular to an airtightness detection device for valve production. Background Technique

[0002] The function of the valve is to be specifically responsible for inputting air into the engine and discharging the exhaust gas after combustion; structurally, the valve is divided into an intake valve and an exhaust valve; the function of the intake valve is to suck air into the engine and mix it with fuel for combustion; the function of the exhaust valve is to discharge and dissipate the exhaust gas after combustion.

[0003] During the production process of the valve, in order to ensure the quality, airtightness detection work needs to be carried out. The existing detection method for the valve usually directly inflates the valve, and judges whether the valve leaks by detecting the air pressure of the valve after inflation. However, since the valve is installed on the engine, the above detection method cannot ensure the sealing performance of the valve after it is installed on the engine, so improvement is needed. Content of the Utility Model

[0004] The purpose of the utility model is to provide an airtightness detection device for valve production to solve the problem of poor airtightness detection effect of the valve proposed in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an airtightness detection device for valve production, including a detection table, a fixed frame is fixedly connected to the top of the detection table, an engine connection mold is fixed on the top of the detection table, and a seal detection component is arranged on the engine connection mold;

[0006] The seal detection component includes a lower seal cover fixed to the top of the engine connection mold, a valve rod to be detected is inserted on the engine connection mold, the bottom of the fixed frame is connected with a lifting upper seal cover, the upper seal cover and the lower seal cover are spliced to form a sealing structure, and an air inflation pump and a pressure gauge are arranged on the upper seal cover.

[0007] Preferably, a cylinder is fixedly connected to the top of the fixed frame, and one end of the cylinder is connected to the top of the upper seal cover.

[0008] Preferably, the bottom of the upper seal cover is in a convex structure, and an annular groove is opened on the top of the lower seal cover, and the convex structure is matched with the annular groove structure.

[0009] Preferably, a connecting pipe is connected to one side of the top of the upper seal cover, one end of the connecting pipe is connected to the air inflation pump, and a one-way valve is arranged on the connecting pipe.

[0010] Preferably, an exhaust pipe is connected to the other side of the top of the upper seal cover, and an exhaust valve is arranged on the exhaust pipe.

[0011] Preferably, the pressure gauge is located on one side of the exhaust pipe, and the pressure gauge is used for pressure detection.

[0012] Preferably, the engine connecting mold and the lower sealing cover are integrally connected.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] (1) This device can improve the detection effect of the valve stem to be detected and ensure the sealing performance after the valve stem to be detected is installed on the engine.

[0015] (2) By setting an engine connecting mold with the same shape and size as the engine valve connection port on the top of the detection table, and performing air inflation detection work after inserting the valve stem to be detected into the engine connecting mold, this device can not only detect the air tightness of the valve stem to be detected but also ensure the sealing performance when the valve stem to be detected is installed and used, improving the detection efficiency.

[0016] (3) By setting a lower sealing cover on the outer wall of the engine connecting mold and an upper sealing cover that can be automatically spliced and separated on the lower sealing cover, the airtight requirement for detection can be quickly realized through the splicing of the upper sealing cover and the lower sealing cover. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an airtightness detection device for valve production according to the present utility model;

[0018] Figure 2 It is an Figure 1 enlarged view of part A in the airtightness detection device for valve production according to the present utility model;

[0019] Figure 3 It is a cross-sectional view of an airtightness detection device for valve production according to the present utility model.

[0020] In the figure: 1. Electric cylinder; 2. Fixed frame; 3. Sealing detection assembly; 31. Pressure gauge; 32. Exhaust pipe; 33. Exhaust valve; 34. Upper sealing cover; 35. Lower sealing cover; 36. Air inflation pump; 37. Check valve; 38. Connecting pipe; 4. Engine connecting mold; 5. Detection table; 6. Valve stem to be detected. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the 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.

[0022] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: an airtightness detection device for valve production, including a detection table 5, a fixed frame 2 is fixedly connected to the top of the detection table 5, an electric cylinder 1 is fixedly connected to the top of the fixed frame 2, and one end of the electric cylinder 1 is connected to the top of the upper sealing cover 34; this structure can push the upper sealing cover 34 to be automatically sealed with the lower sealing cover 35 through the electric cylinder 1; an engine connection mold 4 is fixed on the top of the detection table 5, and the engine connection mold 4 is integrally connected with the lower sealing cover 35; this structure can ensure the sealing performance at the connection between the engine connection mold 4 and the lower sealing cover 35; a sealing detection assembly 3 is arranged on the engine connection mold 4.

[0023] The sealing detection assembly 3 includes a lower sealing cover 35 fixed to the top of the engine connection mold 4. The engine connection mold 4 of this device has the same shape and size as the engine valve connection port, so as to ensure the sealing performance between the valve stem 6 to be detected and the engine after the detection is completed. A valve stem 6 to be detected is inserted into the engine connection mold 4. The upper sealing cover 34 is connected to the bottom of the fixed frame 2 in a lifting manner. The bottom of the upper sealing cover 34 is of a convex structure, and an annular groove is opened at the top of the lower sealing cover 35. The convex structure matches the annular groove structure; this structure can ensure the sealing performance after the upper sealing cover 34 and the lower sealing cover 35 are spliced; a connecting pipe 38 is connected to one side of the top of the upper sealing cover 34, one end of the connecting pipe 38 is connected to an air inflation pump 36, and a one-way valve 37 is arranged on the connecting pipe 38; this structure can avoid air leakage at the connecting pipe 38 by setting the one-way valve 37; a discharge pipe 32 is connected to the other side of the top of the upper sealing cover 34, and an exhaust valve 33 is arranged on the discharge pipe 32; the exhaust valve 33 of this structure is an electromagnetic valve, and the automatic discharge of the gas inside the lower sealing cover 35 and the upper sealing cover 34 can be realized through the exhaust valve 33, which is convenient for separating the lower sealing cover 35 and the upper sealing cover 34; the upper sealing cover 34 and the lower sealing cover 35 are spliced to form a sealed structure. An air inflation pump 36 and a pressure gauge 31 are arranged on the upper sealing cover 34. The pressure gauge 31 is located on one side of the discharge pipe 32, and the pressure gauge 31 is used for pressure detection; this structure detects the pressure between the lower sealing cover 35 and the upper sealing cover 34 through the pressure gauge 31, and whether there is leakage at the connection between the valve stem 6 to be detected and the engine connection mold 4 can be judged according to the display of the pressure on the pressure gauge 31; after the lower sealing cover 35 and the upper sealing cover 34 are spliced and sealed, a closed space is formed inside the lower sealing cover 35 and the upper sealing cover 34. After a certain air pressure is supplemented into the lower sealing cover 35 and the upper sealing cover 34 through the air inflation pump 36, the pressure inside the lower sealing cover 35 and the upper sealing cover 34 can be detected through the pressure gauge 31. If there is leakage at the connection between the valve stem 6 to be detected and the engine connection mold 4, the pressure gauge 31 will fluctuate, and it can be judged whether there is leakage at the connection between the valve stem 6 to be detected and the engine connection mold 4.

[0024] Working principle: When using this airtightness detection device for valve production, first insert the valve stem 6 to be detected into the top of the engine connection mold 4. Then, the electric cylinder 1 pushes the upper sealing cover 34 downwards, so that the upper sealing cover 34 is inserted into the lower sealing cover 35, and a closed space is formed after the upper sealing cover 34 and the lower sealing cover 35 are spliced. Next, start the air inflation pump 36 in the state where the exhaust valve 33 is closed. After the air inflation pump 36 starts, it inflates the inside of the upper sealing cover 34 and the lower sealing cover 35 through the connecting pipe 38, so that the pressure inside the upper sealing cover 34 and the lower sealing cover 35 increases. When the pressure inside the upper sealing cover 34 and the lower sealing cover 35 reaches an appropriate value, the air inflation pump 36 is closed. At this time, the pressure gauge 31 detects the pressure inside the upper sealing cover 34 and the lower sealing cover 35. By waiting and observing, if there is no leakage at the connection between the valve stem 6 to be detected and the engine connection mold 4, the pressure gauge 31 hardly fluctuates. When there is a leakage at the connection between the valve stem 6 to be detected and the engine connection mold 4, the pressure gauge 31 fluctuates. Thus, after exhausting the upper sealing cover 34 and the lower sealing cover 35, the defective valve stem 6 to be detected can be removed.

[0025] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An airtightness detection device for valve production, including a detection table (5), and a fixing frame (2) is fixedly connected to the top of the detection table (5), characterized in that: The top of the inspection table (5) is fixedly provided with an engine connection mold (4), and a seal inspection component (3) is arranged on the engine connection mold (4); The seal inspection component (3) includes a lower seal cover (35) fixed to the top of the engine connection mold (4). A valve stem (6) to be inspected is inserted into the engine connection mold (4). The bottom of the fixing frame (2) is connected with a liftable upper seal cover (34). The upper seal cover (34) and the lower seal cover (35) are spliced to form a sealing structure. An air inflation pump (36) and a pressure gauge (31) are arranged on the upper seal cover (34).

2. The airtightness detection device for valve production according to claim 1, wherein: The top of the fixing frame (2) is fixedly connected with an electric cylinder (1), and one end of the electric cylinder (1) is connected to the top of the upper seal cover (34).

3. The airtightness detection device for valve production according to claim 1, characterized in that: The bottom of the upper seal cover (34) is of a convex structure, and an annular groove is formed in the top of the lower seal cover (35). The convex structure matches the annular groove structure.

4. An airtightness detection device for valve production according to claim 1, characterized in that: One side of the top of the upper seal cover (34) is connected with a connecting pipe (38). One end of the connecting pipe (38) is connected to the air inflation pump (36), and a one-way valve (37) is arranged on the connecting pipe (38).

5. The airtightness detection device for valve production according to claim 1, characterized in that: The other side of the top of the upper seal cover (34) is connected with an exhaust pipe (32), and an exhaust valve (33) is arranged on the exhaust pipe (32).

6. The airtightness detection device for valve production according to claim 1, wherein: The pressure gauge (31) is located on one side of the exhaust pipe (32), and the pressure gauge (31) is used for pressure detection.

7. The airtightness detection device for valve production according to claim 1, characterized in that: The engine connection mold (4) is integrally connected with the lower seal cover (35).

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