Air tightness testing device for metal pipe body of valve

Abstract

The invention discloses an air tightness testing device for a metal pipe body of a valve, and relates to the technical field of air tightness detection. Comprising a test water tank; the steel pipe mounting assembly and the steel pipe supporting assembly are sequentially arranged in the test water tank from top to bottom; the steel pipe mounting assembly comprises a fixed cylinder seat horizontally arranged on the inner wall of the test water tank, a pressing cylinder is embedded in the fixed cylinder seat, a piston rod of the pressing cylinder is provided with a pressing disc, and the pressing disc is connected with an inflator pump arranged on the outer wall of the test water tank; the steel pipe supporting assembly comprises a lifting air cylinder arranged at the bottom of the testing water tank, a lifting plate is arranged on a piston rod of the lifting air cylinder, a plurality of supporting plates are slidably arranged on the lifting plate, pipe grooves are formed in the ends, away from the lifting plate, of the supporting plates, and limiting grooves are formed in the side walls of the supporting plates. The lifting plate is further provided with a limiting clamping assembly matched with the limiting groove. The device has the advantages that the fixing effect of the position of the metal pipe body before testing can be improved, and gas leakage points can be observed conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection, and in particular to an air tightness testing device for a valve metal pipe body. Background Art

[0002] A valve is installed on a pipe body to control the flow of various types of fluids. If the pipe body has airtightness problems during use, it will affect the use of the valve. Therefore, the pipe body needs to be tested for airtightness during the production process. At present, the metal pipe body is often pressurized by filling gas into it, and then observing whether there are leaks on the metal pipe body in a water tank. During the test, the inflator head is generally installed at both ends of the metal pipe body, and then the metal pipe body is directly placed in the water tank. After the gas is introduced, the air pressure is filled into the inside of the metal pipe body through the inflator head to observe whether there are leaks on the metal pipe body. During use, the metal pipe body is generally placed directly in the water tank, which makes the metal pipe body easy to move in the water tank; at the same time, because the floating impurities in the water tank will adhere to the outer wall of the metal pipe body to be tested or will not be suspended in the water around the metal pipe body to be tested, it will have a certain impact on the observation of leaks. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a valve metal tube air tightness testing device, which has the advantages of improving the fixing effect of the metal tube position before testing and facilitating the observation of leakage points.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a valve metal pipe air tightness test device, comprising: Test water tanks; Steel pipe mounting assembly; The steel pipe support assembly, the steel pipe installation assembly and the steel pipe support assembly are arranged in the test water tank in sequence from top to bottom; The steel pipe installation assembly includes a fixed cylinder seat horizontally arranged on the inner wall of the test water tank, a clamping cylinder is embedded in the fixed cylinder seat, a clamping plate is arranged on the piston rod of the clamping cylinder, and the clamping plate is connected to an air pump arranged on the outer wall of the test water tank; The steel pipe support assembly includes a lifting cylinder arranged at the bottom of the test water tank, a lifting plate is arranged on the piston rod of the lifting cylinder, a plurality of support plates are slidingly arranged on the lifting plate, a pipe groove is arranged at one end of the support plate away from the lifting plate, a limiting groove is arranged on the side wall of the support plate, and a limiting card assembly matching the limiting groove is also arranged on the lifting plate.

[0005] Preferably, a circular groove is provided on the circular surface of the fixed cylinder seat facing the clamping disk, and the clamping cylinder is embedded in the circular groove, so that one end of the metal tube to be tested is inserted into the circular groove, which is beneficial to improve the sealing of the test.

[0006] Preferably, an air outlet sleeve is provided on the circular surface of the pressure plate facing the fixed cylinder seat, and an external thread is provided on the outside of the piston rod of the pressure cylinder. The air outlet sleeve is a hollow annular structure, and an internal thread matching the external thread on the piston rod of the pressure cylinder is provided on the inner circumferential wall of the air outlet sleeve, and the air outlet sleeve is threadedly connected to the piston rod of the pressure cylinder, and a plurality of air outlet holes are provided on the outer circumferential wall of the air outlet sleeve, and the air outlet end of the inflation pump is connected to the air outlet sleeve through a hose, and the fixed cylinder seat, the annular groove, the piston rod of the pressure cylinder, the pressure plate and the air outlet sleeve are coaxial, so that after the metal tube body to be detected is sleeved on the outside of the piston rod of the pressure cylinder, the air outlet sleeve is threadedly connected to the outside of the piston rod of the pressure cylinder, and the pressure cylinder is started to drive the pressure plate to move in the direction close to the metal tube body to be detected, thereby fixing the metal tube body to be detected.

[0007] Preferably, a guide tube sleeve is provided on the inner wall of the test water tank, and the guide tube sleeve is arranged on the inner wall of the test water tank opposite to the fixed cylinder seat. A guide tube is slidably penetrated in the guide tube sleeve, and the end of the guide tube away from the guide tube sleeve is connected to the clamping plate. The hose movably penetrates the guide tube and is connected to the air outlet sleeve. The clamping plate, the guide tube sleeve and the guide tube are coaxial, so when the clamping cylinder is started to drive the clamping plate to clamp the metal tube body to be tested, the guide tube can slide in the guide tube sleeve, which is beneficial to keep the position of the metal tube body to be tested stable when clamped.

[0008] Preferably, the limit card assembly includes: A rotating motor is arranged on the side wall of the lifting plate; A rotating rod, the rotating rod being coaxially arranged on the output shaft of the rotating motor; There are multiple limit cards, and the limit cards are spaced apart along the length direction of the rotating rod, so that the rotating rod and the limit card can be driven by the rotating motor to rotate toward the support plate, so that the limit cards can be inserted into the limit slots at the corresponding positions respectively, thereby preventing the support plate from sliding.

[0009] Preferably, the limit card is an L-shaped structure, and the vertical end of the limit card is fixedly arranged on the outer peripheral wall of the rotating rod, and the horizontal end of the limit card is movably inserted into the limit groove at the corresponding position, and the distance between two adjacent limit cards is greater than the thickness of the support plate, so that the rotating rod and the limit card can be driven by the rotating motor to rotate in the direction close to the support plate, so that the limit cards can be respectively inserted into the limit grooves at the corresponding positions, which can prevent the support plate from sliding.

[0010] Preferably, the lifting plate is provided with a left support seat and a right support seat at intervals, a sliding rod is horizontally provided between the left support seat and the right support seat, the support plate is movably provided between the left support seat and the right support seat, and the support plate is slidably sleeved on the outside of the sliding rod. The position of the support plate can be adjusted according to the different lengths of the metal tube body to be inspected, so as to facilitate the support of the metal tube body to be inspected before clamping.

[0011] Preferably, a pressure plate cylinder is provided on the top of the test water tank, and a pressure plate is provided on the piston rod of the pressure plate cylinder. The pressure plate is a filter mesh structure, the pressure plate is perpendicular to the support plate, and a plurality of through grooves corresponding to the support plates are provided on the pressure plate. After the air tightness test of the metal pipe body is carried out for a period of time, the pressure plate cylinder is started to push the pressure plate to move toward the bottom surface of the test water tank. At this time, each support plate can pass through the through grooves at its corresponding position respectively, and the metal pipe body to be tested is located above the pressure plate, thereby preventing impurities in the water in the test water tank from affecting the test.

[0012] The beneficial effects of the present invention are: 1. The clamping cylinder drives the clamping plate to move, and with the cooperation of the fixed cylinder seat (i.e., one end of the metal tube body to be tested is inserted into the circular groove), it is convenient to clamp and fix the metal tube bodies to be tested of different lengths, thereby improving the applicability and sealing of the test.

[0013] 2. The support plate can be slidably arranged on the slide rod, so that the position of the support plate can be adjusted according to the different lengths of the metal tube to be detected, and then the limit card assembly can be used to fix the limit, so as to support the metal tube to be detected before clamping.

[0014] 3. The setting of the pressure plate in the test water tank makes it easy to filter and isolate impurities in the water before testing the metal pipe body to be tested, so that the impurities in the water will not adhere to the outer wall of the metal pipe body to be tested or will not be suspended in the water around the metal pipe body to be tested, thereby reducing or avoiding the impact on the metal pipe body to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the internal structure of a valve metal tube air tightness testing device provided in an embodiment of the present invention.

[0017] Figure 2A schematic structural diagram of a steel pipe installation assembly of a valve metal pipe body air tightness testing device provided in an embodiment of the present invention.

[0018] Figure 3 A schematic structural diagram of a steel pipe support assembly of a valve metal pipe body air tightness testing device provided in an embodiment of the present invention.

[0019] Figure 4 Based Figure 3 A schematic diagram of the enlarged structure in the middle.

[0020] Figure 5 A schematic diagram of the pressure plate structure of a valve metal tube air tightness testing device provided in an embodiment of the present invention.

[0021] Figure 6 A schematic structural diagram of a limit card assembly of a valve metal tube air tightness testing device provided in an embodiment of the present invention.

[0022] Explanation of the reference numerals in the accompanying drawings: 1. Test water tank; 2. Steel pipe installation assembly; 21. Fixed cylinder seat; 211. Circular clamping groove; 22. Clamping cylinder; 23. Clamping plate; 24. Air outlet sleeve; 241. Air outlet hole; 3. Steel pipe support assembly; 31. Lifting cylinder; 32. Lifting plate; 321. Left support seat; 322. Right support seat; 323. Slide rod; 33. Support plate; 34. Pipe groove; 35. Limiting groove; 4. Limiting card assembly; 41. Rotating motor; 42. Rotating rod; 43. Limiting card; 5. Guide pipe sleeve; 51. Guide pipe; 6. Pressure plate cylinder; 61. Pressure plate; 62. Through groove; 7. Air pump; 71. Hose. DETAILED DESCRIPTION

[0023] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0024] Embodiment 1 like Figures 1 to 5As shown, the present invention provides a valve metal pipe air tightness test device, including a test water tank 1; a steel pipe installation component 2 and a steel pipe support component 3 are arranged in the test water tank 1 from top to bottom in sequence; the steel pipe installation component 2 includes a fixed cylinder seat 21 horizontally arranged on the inner wall of the test water tank 1, and a clamping cylinder 22 is embedded in the fixed cylinder seat 21, and a clamping plate 23 is arranged on the piston rod of the clamping cylinder 22, and the clamping plate 23 is connected to the air pump 7 arranged on the outer wall of the test water tank 1; the steel pipe support component 3 includes a lifting cylinder 31 arranged at the bottom of the test water tank 1, and a lifting plate 32 is arranged on the piston rod of the lifting cylinder 31, and a plurality of support plates are slidably arranged on the lifting plate 32 33, a pipe groove 34 is provided at one end of the support plate 33 away from the lifting plate 32, a limiting groove 35 is provided on the side wall of the support plate 33, and a limiting clamping assembly 4 matched with the limiting groove 35 is also provided on the lifting plate 32; a circular ring clamping groove 211 is provided on the circular surface of the fixed cylinder seat 21 facing the clamping plate 23, and the clamping cylinder 22 is embedded in the circular ring clamping groove 211; a left support seat 321 and a right support seat 322 are arranged at intervals on the lifting plate 32, a sliding rod 323 is horizontally arranged between the left support seat 321 and the right support seat 322, the support plate 33 is movably arranged between the left support seat 321 and the right support seat 322, and the support plate 33 is slidably sleeved on the outside of the sliding rod 323.

[0025] First, according to the length of the metal tube to be detected, the position of the support plate 33 is slidably adjusted on the lifting plate 32 (that is, the support plate 33 is slid on the slide bar 323 between the left support seat 321 and the right support seat 322, and then the position of the support plate 33 is fixed by the limit card assembly 4 to prevent the metal tube to be detected from being offset when supporting the metal tube to be detected), so that when the metal tube to be detected is horizontally clamped between the fixed cylinder seat 21 and the clamping plate 23 under the action of the clamping cylinder 22 (the water surface in the test water tank 1 is above the metal tube to be detected), the lifting plate 32 and the support plate 33 are driven up and down by starting the lifting cylinder 31, so that the metal tube to be detected is located in the pipe groove 34 on the support plate 33, so as to improve the supporting effect on the metal tube to be detected and keep its position stable during detection; then the air pump 7 is started to inflate, and it is observed whether there is a leak point on the metal tube to be detected and the position of the leak point, so as to determine the position of the leak.

[0026] Before using the clamping cylinder 22 to clamp the metal tube to be tested, one end of the metal tube to be tested can be inserted into the annular groove 211, so that the clamping plate 23 can be pressed against the other end of the metal tube to be tested under the drive of the clamping cylinder 22, which is beneficial to improve the sealing of the test.

[0027] A pressure plate cylinder 6 is provided on the top of the test water tank 1, and a pressure plate 61 is provided on the piston rod of the pressure plate cylinder 6. The pressure plate 61 is a filter mesh structure, and the pressure plate 61 is perpendicular to the support plate 33. The pressure plate 61 is provided with a plurality of through grooves 62 corresponding to the support plate 33 one by one. After the air tightness test of the metal pipe body is performed for a period of time, the pressure plate cylinder 6 is started to push the pressure plate 61 to move toward the bottom surface of the test water tank 1 (that is, the pressure plate 61 moves from the water surface in the test water tank 1 to the bottom of the test water tank 1, and the test water tank 1 can be The impurities in the water are pushed to the bottom of the test water tank 1. When the metal tube to be tested continues to be tested, the impurities in the water will not adhere to the outer wall of the metal tube to be tested or will not be suspended in the water around the metal tube to be tested, thereby reducing or avoiding the impact on the metal tube to be tested); at this time, each support plate 33 can pass through the through groove 62 at its corresponding position, and the metal tube to be tested is located above the pressure plate 61, thereby preventing the impurities in the water in the test water tank 1 from affecting the test.

[0028] Before using the pressure plate 61, the water in the test water tank 1 can be released so that the water level drops to the position below the steel pipe installation assembly 2, and then the pressure plate 61 is connected to the piston rod of the pressure plate cylinder 6 (a bolt connection method can be adopted, that is, the bolts pass through the pressure plate 61 and connect it to the piston rod of the pressure plate cylinder 6, which is convenient for disassembly), thereby preventing the steel pipe installation assembly 2 and the pressure plate 61 from interfering with each other.

[0029] Embodiment 2 Based on the first embodiment, Figures 1 to 3 , Figures 5 and 6 As shown, an air outlet sleeve 24 is provided on the circular surface of the compression plate 23 facing the fixed cylinder seat 21, and an external thread is provided on the outside of the piston rod of the compression cylinder 22. The air outlet sleeve 24 is a hollow annular structure, and an internal thread matching the external thread on the piston rod of the compression cylinder 22 is provided on the inner circumferential wall of the air outlet sleeve 24, and the air outlet sleeve 24 is threadedly connected with the piston rod of the compression cylinder 22. A plurality of air outlet holes 241 are provided on the outer circumferential wall of the air outlet sleeve 24, and the air outlet end of the air pump 7 is connected to the air outlet sleeve 24 through a hose 71, and The fixed cylinder seat 21, the annular groove 211, the piston rod of the clamping cylinder 22, the clamping plate 23 and the air outlet sleeve 24 are coaxial; a guide tube sleeve 5 is provided on the inner wall of the test water tank 1, and the guide tube sleeve 5 is provided on the inner wall of the test water tank 1 opposite to the fixed cylinder seat 21. A guide tube 51 is slidably penetrated in the guide tube sleeve 5, and one end of the guide tube 51 away from the guide tube sleeve 5 is connected to the clamping plate 23, and the hose 71 movably penetrates the guide tube 51 and is connected to the air outlet sleeve 24, and the clamping plate 23, the guide tube sleeve 5 and the guide tube 51 are coaxial.

[0030] Before testing the metal tube to be tested, the metal tube to be tested is first sleeved on the outside of the piston rod of the clamping cylinder 22 (and one end of the metal tube to be tested is inserted into the annular clamping groove 211 on the fixed cylinder seat 21); then the air outlet sleeve 24 is threadedly connected to the piston rod of the clamping cylinder 22; the clamping cylinder 22 is started to drive the clamping plate 23 to move in the direction close to the metal tube to be tested, so that the metal tube to be tested can be clamped and fixed (when the clamping cylinder 22 drives the clamping plate 23 to clamp the metal tube to be tested, the metal tube to be tested is clamped and fixed). , which can simultaneously drive the guide tube 51 to slide in the guide tube sleeve 5, that is, the guide tube sleeve 5 can support the end of the guide tube 51 away from the clamping plate 23, so as to help keep the position of the metal tube to be inspected stable when clamped); then start the air pump 7 to inflate, the gas can enter the air outlet sleeve 24 through the hose 71, and then be discharged into the metal tube to be inspected through the air outlet hole 241 on the outer wall of the air outlet sleeve 24, observe whether there is a leak on the metal tube to be inspected, and the position of the leak, so as to determine the position of the leak.

[0031] Embodiment 3 Based on the first embodiment, Figure 1 , Figure 3 to Figure 4 , Figure 6 As shown, the limit card assembly 4 includes a rotating motor 41, which is arranged on the side wall of the lifting plate 32; the rotating rod 42 is coaxially arranged on the output shaft of the rotating motor 41; a plurality of limit cards 43 are provided, and the plurality of limit cards 43 are spaced apart along the length direction of the rotating rod 42; the limit card 43 is an L-shaped structure, and the vertical end of the limit card 43 is fixedly arranged on the outer peripheral wall of the rotating rod 42, and the horizontal end of the limit card 43 is movably inserted into the limit groove 35 at the corresponding position, and the distance between two adjacent limit cards 43 is greater than the thickness of the support plate 33.

[0032] After the position of the support plate 33 is adjusted by sliding on the slide bar 323 according to the different lengths of the metal tube to be detected, the rotating motor 41 is started to drive the rotating rod 42 and the limit card 43 to rotate in the direction close to the support plate 33, so that the horizontal ends of the limit cards 43 can be inserted into the limit grooves 35 at the corresponding positions, and then the position of the support plate 33 can be limited, which is beneficial to improve the stability of the support for the metal tube to be detected; the distance between two adjacent limit cards 43 is greater than the thickness of the support plate 33, which can avoid interference between the limit cards 43 that are not inserted into the limit grooves 35 and the support plate 33.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A valve metal tube air tightness test device, characterized in that: include: Test water tank (1); Steel pipe mounting assembly (2); The steel pipe support assembly (3), the steel pipe installation assembly (2) and the steel pipe support assembly (3) are arranged in sequence from top to bottom in the test water tank (1); The steel pipe installation assembly (2) comprises a fixed cylinder seat (21) horizontally arranged on the inner wall of the test water tank (1), a clamping cylinder (22) is embedded in the fixed cylinder seat (21), a clamping plate (23) is arranged on the piston rod of the clamping cylinder (22), and the clamping plate (23) is connected to an air pump (7) arranged on the outer wall of the test water tank (1); The steel pipe support assembly (3) comprises a lifting cylinder (31) arranged at the bottom of the test water tank (1); a lifting plate (32) is arranged on the piston rod of the lifting cylinder (31); a plurality of support plates (33) are slidably arranged on the lifting plate (32); a pipe groove (34) is arranged at one end of the support plate (33) away from the lifting plate (32); a limiting groove (35) is arranged on the side wall of the support plate (33); and a limiting card assembly (4) adapted to the limiting groove (35) is also arranged on the lifting plate (32).

2. A valve metal tube air tightness testing device as claimed in claim 1, characterized in that: A circular groove (211) is provided on the circular surface of the fixed cylinder seat (21) facing the pressing disc (23), and the pressing cylinder (22) is embedded in the circular groove (211).

3. A valve metal pipe air tightness testing device as claimed in claim 1, characterized in that: An air outlet sleeve (24) is arranged on the circular surface of the clamping plate (23) facing the fixed cylinder seat (21), and an external thread is arranged on the outside of the piston rod of the clamping cylinder (22). The air outlet sleeve (24) is a hollow annular structure, and an internal thread matching the external thread on the piston rod of the clamping cylinder (22) is arranged on the inner circumferential wall of the air outlet sleeve (24), and the air outlet sleeve (24) and the piston rod of the clamping cylinder (22) are threadedly connected, and a plurality of air outlet holes (241) are arranged on the outer circumferential wall of the air outlet sleeve (24). The air outlet end of the air pump (7) is connected to the air outlet sleeve (24) through a hose (71), and the fixed cylinder seat (21), the annular groove (211), the piston rod of the clamping cylinder (22), the clamping plate (23) and the air outlet sleeve (24) are coaxial.

4. A valve metal pipe air tightness testing device as claimed in claim 3, characterized in that: A guide tube sleeve (5) is provided on the inner wall of the test water tank (1). The guide tube sleeve (5) is provided on the inner wall of the test water tank (1) opposite to the fixed cylinder seat (21). A guide tube (51) is slidably provided in the guide tube sleeve (5). One end of the guide tube (51) away from the guide tube sleeve (5) is connected to the compression plate (23). The hose (71) movably passes through the guide tube (51) and is connected to the air outlet sleeve (24). The compression plate (23), the guide tube sleeve (5) and the guide tube (51) are coaxial.

5. A valve metal pipe air tightness testing device as claimed in claim 1, characterized in that: The limit card assembly (4) includes: A rotating motor (41), wherein the rotating motor (41) is arranged on a side wall of the lifting plate (32); A rotating rod (42), the rotating rod (42) being coaxially arranged on an output shaft of the rotating motor (41); A limit card (43), wherein a plurality of limit cards (43) are provided, and the plurality of limit cards (43) are spaced apart and distributed along the length direction of the rotating rod (42).

6. A valve metal pipe air tightness testing device as claimed in claim 5, characterized in that: The limiting card (43) is an L-shaped structure, and the vertical end of the limiting card (43) is fixedly arranged on the outer peripheral wall of the rotating rod (42), and the horizontal end of the limiting card (43) is movably inserted into the limiting groove (35) at the corresponding position, and the distance between two adjacent limiting cards (43) is greater than the thickness of the support plate (33).

7. A valve metal pipe air tightness testing device as claimed in claim 1, characterized in that: A left support seat (321) and a right support seat (322) are arranged on the lifting plate (32) at intervals, a slide bar (323) is arranged horizontally between the left support seat (321) and the right support seat (322), the support plate (33) is movably arranged between the left support seat (321) and the right support seat (322), and the support plate (33) is slidably sleeved on the outside of the slide bar (323).

8. A valve metal pipe air tightness testing device as claimed in claim 1, characterized in that: A pressure plate cylinder (6) is arranged on the top of the test water tank (1), and a pressure plate (61) is arranged on the piston rod of the pressure plate cylinder (6). The pressure plate (61) is a filter mesh structure. The pressure plate (61) is perpendicular to the support plate (33), and a plurality of through grooves (62) corresponding to the support plates (33) are arranged on the pressure plate (61).

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