Nozzle coaxial sealing detector

Abstract

The nozzle coaxial sealing detector comprises a detection assembly and an ejector rod arranged in the detection assembly, the detection assembly comprises a center cylinder, a limiting block detachably installed at the bottom of the center cylinder and an upper protruding base fixed to the upper end face of the center cylinder, and the center cylinder is of a hollow cavity structure with the two ends provided with openings. A sliding groove penetrating through the two sides of the upper protruding base is formed in the upper protruding base, the ejector rod is installed in the sliding groove in a sliding mode, the top of the ejector rod abuts against a detection ball, the detection ball is used for being in contact connection with a to-be-detected nozzle, the to-be-detected nozzle is arranged on the top of the upper protruding base in a sleeving mode, a top cover is arranged on the outer side of the to-be-detected nozzle in a sleeving mode, and a testing air inlet is connected to the outer side of the upper protruding base. The detection assembly further comprises a gas leak detector. According to the nozzle coaxial sealing detector, the ejector rod and the detection ball are driven to ascend and descend in a gas pushing mode, a mechanical structure such as an air cylinder is avoided, and the gas leakage phenomenon caused by factors such as tolerance of the mechanical structure is avoided.

Description

Technical Field

[0001] The utility model relates to a nozzle detector, in particular to a nozzle coaxial sealing detector. Background Art

[0002] One of the most important properties of a nozzle is its airtightness. A nozzle with excellent airtightness can work stably for a long time and is not prone to malfunction. This is why the nozzle coaxial seal tester was created to test the airtightness of various nozzles with a minimalist design, stable structure, and the highest standards. Current instruments for nozzle airtightness testing require the use of cylinder-type equipment to move a test ball, which contacts the inner wall of each nozzle to be tested. The instrument itself then performs an airtightness test at the junction of the nozzle and the test ball. The disadvantage of cylinder-type equipment is that its accuracy is not very high, and it is easy for the instrument itself to leak due to factors such as mechanical structure tolerance, making it impossible to accurately test the airtightness of the nozzle. Utility Model Content

[0003] The purpose of the utility model is to provide a nozzle coaxial sealing tester, which drives the push rod and the detection ball to rise and fall by gas propulsion, avoiding the use of mechanical structures such as cylinders in the existing technology, avoiding the use of mechanical structures, and avoiding air leakage caused by factors such as tolerance of the mechanical structure.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a nozzle coaxial seal tester, comprising a detection component and a push rod arranged in the detection component, the detection component comprising a central cylinder, a limit block detachably mounted on the bottom of the central cylinder and an upper boss fixed to the upper end face of the central cylinder, the central cylinder is a cavity structure with openings at both ends and a hollow interior, a slide groove is formed on the upper boss running through both sides thereof, the push rod is slidably mounted in the slide groove, and the top of the push rod abuts a detection ball, the detection ball is used to contact and connect with the nozzle to be detected, the nozzle to be detected is sleeved on the top of the upper boss, and the outer side of the nozzle to be detected is sleeved with a top cover, and a test air inlet is connected to the outer side of the upper boss, the detection component also includes a gas leak detector, the gas leak detector is arranged directly above the nozzle to be detected, and is used to detect whether there is a gap between the detection ball and the nozzle to be detected.

[0005] Preferably, a first gap is provided between the central cylinder and the limit block, and a first sealing gasket is fixedly connected to the outer circle of the limit block, and the first sealing gasket fits against the inner wall of the first gap; so that the limit block can enhance the air tightness through the first sealing gasket to avoid air leakage at the position where the limit block is located.

[0006] Preferably, a second gap is provided between the upper boss and the push rod, and a second sealing gasket is fixedly connected to the outer circle of the push rod, and the second sealing gasket fits against the inner wall of the second gap; so that when the push rod is raised or lowered, the second sealing gasket is driven to rise or fall with it, thereby avoiding air leakage at the position where the second gap is located.

[0007] Preferably, an inner sealing assembly is provided in the cavity structure of the central cylinder, and the inner sealing assembly includes a third sealing gasket and bearing sleeves symmetrically connected on both sides of the third sealing gasket, the push rod is installed on the two bearing sleeves, and the third sealing gasket fits the inner wall of the central cylinder; thereby, the push rod can drive the bearing sleeve to rise and fall when it is lifted or lowered, so that the bottom of the push rod remains stable when it is lifted or lowered, and the third sealing gasket plays a sealing role, so that there will be no air leakage in the space on the upper and lower sides of the inner sealing assembly in the cavity structure of the central cylinder.

[0008] Preferably, the space inside the cavity of the central cylinder is dynamically divided into two parts by an inner sealing component.

[0009] Preferably, a forward air inlet and a backward air inlet are connected to the outer side of the central cylinder, and the forward air inlet and the backward air inlet are distributed on the upper and lower sides of the inner sealing component.

[0010] Preferably, the bottom and side of the nozzle to be detected are in contact with the upper boss, and the top of the nozzle to be detected is in contact with the top cover; so that after the nozzle to be detected and the top cover are installed, the nozzle to be detected remains fixed under the action of the upper boss and the top cover.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, when testing the air tightness of the nozzle to be tested, the nozzle to be tested is placed on the testing ball, and the bottom and side of the nozzle to be tested are both in contact with the upper convex seat. Then the top cover is put on the nozzle to be tested, and the nozzle to be tested can be completely fixed. At this time, gas is introduced into the cavity of the central cylinder through the front air inlet, so that the gas pushes the push rod to rise, driving the testing ball to generate pressure on the nozzle to be tested, and then an air tightness test can be performed above the nozzle to be tested through a gas leak detector. If there is a gap between the nozzle to be tested and the testing ball, the gas leak detector will detect it and give feedback, thereby accurately realizing the automatic detection of the air tightness of the nozzle to be tested. This scheme drives the push rod and the testing ball to rise and fall by gas propulsion, avoiding the use of mechanical structures such as cylinders in the prior art, avoiding the use of mechanical structures, and avoiding leakage caused by factors such as tolerances of the mechanical structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0013] Figure 2 For the utility model Figure 1 A magnified view of the structure at center A;

[0014] Figure 3 For the utility model Figure 1 Enlarged view of the structure at point B in the middle.

[0015] The reference numerals and names in the figure are as follows: 1. Detection assembly; 11. Center cylinder; 12. Limit block; 13. Upper boss; 14. Slide groove; 15. First gap; 16. First sealing gasket; 17. Second gap; 18. Second sealing gasket; 19. Gas leak detector; 2. Push rod; 3. Forward air inlet; 4. Retract air inlet; 5. Test air inlet; 6. Detection ball; 7. Nozzle to be detected; 8. Top cover; 9. Inner sealing assembly; 91. Bearing sleeve; 92. Third sealing gasket. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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 embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot 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 one or more of the features. In the description of the embodiments of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0018] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0019] See also Figure 1 The present invention provides an embodiment of a nozzle coaxial sealing detector, comprising a detection assembly 1 and a push rod 2 arranged in the detection assembly 1, the detection assembly 1 comprising a central cylinder 11, a limit block 12 detachably mounted on the bottom of the central cylinder 11 and an upper boss 13 fixed to the upper end surface of the central cylinder 11, the central cylinder 11 is a cavity structure with openings at both ends and a hollow interior, a slide groove 14 is formed on the upper boss 13 and runs through both sides thereof, the push rod 2 is slidably mounted in the slide groove 14, a first gap 15 is provided between the central cylinder 11 and the limit block 12, and the outer circle of the limit block 12 is fixedly connected to a first sealing gasket 16, the first sealing gasket 16 is in contact with the inner wall of the first gap 15, so that the limit block 12 can enhance the airtightness through the first sealing gasket 16 to avoid air leakage at the position where the limit block 12 is located, and a second gap 1 is provided between the upper boss 13 and the push rod 2 7. A second sealing gasket 18 is fixedly connected to the outer circle of the push rod 2, and the second sealing gasket 18 fits with the inner wall of the second gap 17, so that the push rod 2 drives the second sealing gasket 18 to rise and fall when it is lifted or lowered, thereby avoiding air leakage at the position where the second gap 17 is located. An inner sealing component 9 is provided in the cavity structure of the central cylinder 11, and the space in the cavity of the central cylinder 11 is dynamically divided into two parts by the inner sealing component 9. A forward air inlet 3 and a backward air inlet 4 are connected to the outside of the central cylinder 11. The forward air inlet 3 and the backward air inlet 4 are distributed on the upper and lower sides of the inner sealing component 9, and a test air inlet 5 is connected to the outside of the upper boss 13. The forward air inlet 3, the backward air inlet 4 and the test air inlet 5 are all provided with valves, and the structure of the valve is the existing technology and will not be repeated here. The pressure in the forward air inlet 3, the backward air inlet 4 and the test air inlet 5 can be adjusted;

[0020] See also Figure 2, the top of the push rod 2 is abutted with a detection ball 6, which is a G5-grade ceramic ball and can be replaced. The detection ball 6 is used to contact and connect with the nozzle to be detected 7. The nozzle to be detected 7 is sleeved on the top of the upper boss 13, and the outer side of the nozzle to be detected 7 is sleeved with a top cover 8. The bottom and side of the nozzle to be detected 7 are abutted with the upper boss 13, and the top of the nozzle to be detected 7 is abutted with the top cover 8, so that after the nozzle to be detected 7 and the top cover 8 are installed, the nozzle to be detected 7 remains fixed under the action of the upper boss 13 and the top cover 8. The detection assembly 1 also includes a gas leak detector 19, which is arranged just above the nozzle to be detected 7 to perform an inclination coaxial airtightness test on the nozzle to be detected 7. The gas leak detector 19 is used to detect whether there is a gap between the detection ball 6 and the nozzle to be detected 7, and the gas leak detector 19 can display the leakage situation (the technical principle of the gas leak detector 19 can refer to the patent application number CN202322985877.8);

[0021] See also Figure 3 The inner sealing assembly 9 includes a third sealing gasket 92 and bearing sleeves 91 symmetrically connected to both sides of the third sealing gasket 92. The push rod 2 is installed on the two bearing sleeves 91. The third sealing gasket 92 fits the inner wall of the central cylinder 11, so that the push rod 2 can drive the bearing sleeves 91 to rise and fall when it is lifted or lowered, so that the bottom of the push rod 2 remains stable when it is lifted or lowered. The third sealing gasket 92 plays a sealing role, so that there will be no air leakage in the space on the upper and lower sides of the inner sealing assembly 9 in the cavity structure of the central cylinder 11.

[0022] During the operation of the present invention, the retreat air inlet 4 is closed, the nozzle to be detected 7 is installed on the upper convex seat 13, and then the top cover 8 is installed on the nozzle to be detected 7. The nozzle to be detected 7 can be fixed by the top cover 8 and the upper convex seat 13. Then, gas (which can be air or other suitable media) is filled into the cavity structure of the central cylinder 11 through the forward air inlet 3. After the gas enters the cavity structure of the central cylinder 11, it pushes the inner sealing component 9 and the push rod 2, so that the push rod 2 rises and drives the detection ball 6 to rise. Finally, the detection ball 6 is completely fitted with the nozzle to be detected 7 (as shown in the attached figure). Figure 2 As shown in the state, a gas leak detector 19 is used to detect above the nozzle 7 to be detected. If there is a gap between the detection ball 6 and the nozzle 7 to be detected, the gas leak detector 19 will detect the gap and give feedback. This solution uses gas to push the detection ball 6 and the nozzle 7 to be detected, eliminating the need for a cylinder-like structure in traditional technology to push, thereby avoiding leakage caused by factors such as tolerance of the mechanical structure. After the test is completed, the gas in the forward air inlet 3 is discharged from the detection component 1 and ventilated toward the retreat air inlet 4, so that the push rod 2 can lower the detection ball 6 by one end, so that the nozzle 7 to be detected can be smoothly taken out.

[0023] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A nozzle coaxial seal detector, comprising a detection assembly (1) and a push rod (2) arranged in the detection assembly (1), characterized in that: The detection assembly (1) includes a central cylinder (11), a limit block (12) detachably mounted on the bottom of the central cylinder (11), and an upper boss (13) fixed to the upper end surface of the central cylinder (11). The central cylinder (11) is a cavity structure with openings at both ends and a hollow interior. A slide groove (14) is formed on the upper boss (13) and passes through both sides thereof. The push rod (2) is slidably mounted in the slide groove (14), and the top of the push rod (2) is abutted against a detection ball (6). The detection ball (6) is used to contact and connect with the nozzle to be detected (7). The nozzle to be detected (7) is sleeved on the top of the upper boss (13), and the outer side of the nozzle to be detected (7) is sleeved with a top cover (8). The outer side of the upper boss (13) is connected to a test air inlet (5). The detection assembly (1) also includes a gas leak detector (19), and the gas leak detector (19) is arranged directly above the nozzle to be detected (7).

2. The nozzle coaxial seal detector according to claim 1, characterized in that: A first gap (15) is provided between the central cylinder (11) and the limiting block (12), and a first sealing gasket (16) is fixedly connected to the outer circle of the limiting block (12), and the first sealing gasket (16) is in contact with the inner wall of the first gap (15).

3. The nozzle coaxial seal detector according to claim 1, characterized in that: A second gap (17) is provided between the upper boss (13) and the push rod (2), and a second sealing gasket (18) is fixedly connected to the outer circle of the push rod (2), and the second sealing gasket (18) is in contact with the inner wall of the second gap (17).

4. The nozzle coaxial seal detector according to claim 1, characterized in that: An inner sealing assembly (9) is provided in the cavity structure of the central cylinder (11), and the inner sealing assembly (9) includes a third sealing gasket (92) and bearing sleeves (91) symmetrically connected to both sides of the third sealing gasket (92). The push rod (2) is mounted on the two bearing sleeves (91), and the third sealing gasket (92) is in contact with the inner wall of the central cylinder (11).

5. The nozzle coaxial seal detector according to claim 4, characterized in that: The space inside the cavity of the central cylinder (11) is dynamically divided into two parts by the inner sealing component (9).

6. The nozzle coaxial seal detector according to claim 4, characterized in that: The outer side of the central cylinder (11) is connected to a forward air inlet (3) and a backward air inlet (4), and the forward air inlet (3) and the backward air inlet (4) are distributed on the upper and lower sides of the inner sealing component (9).

7. The nozzle coaxial seal detector according to claim 1, characterized in that: The bottom and side of the nozzle to be detected (7) are in contact with the upper convex seat (13), and the top of the nozzle to be detected (7) is in contact with the top cover (8).

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