Workpiece air tightness experiment equipment

Abstract

The utility model provides a piece air tightness experiment device. The piece air tightness experiment device comprises a water tank, a mounting frame, a sliding frame, a bottom cover, a top cover and a pushing piece. According to the workpiece airtightness experiment equipment provided by the utility model, the water tank is arranged, the mounting rack is fixedly mounted in the water tank, the sliding rack is slidably arranged on the mounting rack along the vertical direction, the bottom cover is mounted on the sliding rack, and the top cover is further mounted at the top of the sliding rack; the position, on the sliding frame, of the top cover has the freedom degree capable of being adjusted in the vertical direction, and when the fire valve shell is squeezed between the bottom cover and the top cover, the interior of the fire valve shell is pressurized by communicating the gas channel in the top cover with external gas supply equipment. And finally, the sliding frame moves downwards, so that the fire valve shell is immersed in the liquid in the water tank. Therefore, the detection of the air tightness of the fire valve shell is realized, the operation is simple, the observation is convenient, and the detection efficiency of the fire valve air tightness experiment is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of airtightness detection equipment, and particularly relates to a workpiece airtightness experiment equipment. Background Technique

[0002] The fire valve is a very important part of fire-fighting facilities, and it has the functions of fire prevention isolation and controlling the spread of fire. The outer shell of the fire valve is usually formed by casting, and then the installation part is machined. Since the inside of the fire valve is always in a high-pressure state during use, the outer shell of the fire valve needs to be subjected to an airtightness experiment before leaving the factory after processing to detect the airtightness of the outer shell of the fire valve. Ensure the safety of the fire valve during use. At present, the detection method of the airtightness of the fire valve outer shell usually adopts filling a certain pressure of gas into the inside of the fire valve shell, and a pressure gauge is installed on the gas pipeline. The airtightness of the fire valve shell is judged by observing the change of the pressure gauge value. Using this detection method, on the one hand, it is necessary to observe the change of the pressure gauge value within a certain time range. The detection efficiency is low, and when the air leakage effect of the fire valve shell is small, it is not easy to observe and it is easy to miss detection. Content of the Utility Model

[0003] An embodiment of the utility model provides a workpiece airtightness experiment equipment, aiming to solve the problems of low efficiency and unsatisfactory experimental effect in the airtightness experiment of the fire valve in the prior art.

[0004] To achieve the above object, the technical solution adopted by the utility model is: to provide a workpiece airtightness experiment equipment, including:

[0005] A water tank;

[0006] A mounting frame, installed inside the water tank;

[0007] A sliding frame, installed on the mounting frame, the position of the sliding frame on the mounting frame has the freedom to adjust in the vertical direction, and the sliding frame can slide into the inside of the water tank;

[0008] A bottom cover, installed on the sliding frame, used to cover the mouth at the bottom end of the fire valve shell and be hermetically connected to the fire valve shell;

[0009] A top cover, slidably arranged in the vertical direction on the sliding frame, used to cover and seal the mouth at the top end of the fire valve shell, and a gas passage for filling gas into the inside of the fire valve shell is arranged on the bottom cover;

[0010] A pushing member, installed between the top cover and the sliding frame, used to push the top cover to move on the sliding frame.

[0011] In a possible implementation, the top cover abuts against the driving end of the pushing member, and a pulling member for pulling the top cover to abut against the pushing member is arranged between the top cover and the sliding frame.

[0012] In a possible implementation, a sliding groove for accommodating the sliding frame is recessed on the inner wall of the mounting frame. The number of the sliding grooves is two, and the two sliding grooves are located on both sides of the sliding frame, and the length direction of the sliding groove is arranged in the vertical direction.

[0013] In a possible implementation, the mounting frame includes two vertical columns arranged in the vertical direction. The two columns are arranged at intervals, and two baffle plates are fixedly installed on the outer sides of the columns. The two baffle plates and the outer side walls of the columns form the sliding groove.

[0014] In a possible implementation, a support plate is fixedly installed on the sliding frame, and the bottom cover is freely placed on the support plate. A support plate for placing the bottom cover is also fixedly installed on the top of the water tank. When the sliding frame moves upward, the support plate and the support plate form a moving platform for the movement of the bottom cover.

[0015] In a possible implementation, convex ribs for guiding the movement of the bottom cover are arranged on both the support plate and the support plate.

[0016] In a possible implementation, a limiting component for limiting the movement of the bottom cover is also installed on the support plate. When the bottom cover abuts against the limiting component, the bottom cover is located directly below the top cover.

[0017] In a possible implementation, the limiting component includes a fixed block fixedly installed on the support plate and a limiting member threadedly connected to the fixed block. The end of the limiting member is used to limit the movement of the bottom cover.

[0018] In a possible implementation, a power component for driving the sliding frame to move upward is arranged on the mounting frame. The power component includes:

[0019] A sprocket, rotatably arranged on the top of the mounting frame;

[0020] A chain, meshed with the sprocket, and one end of the chain is fixedly installed on the sliding frame;

[0021] A power member, installed on the mounting frame or the water tank, and the driving end of the power member is connected to the other end of the chain for driving the chain to move.

[0022] The solution shown in the embodiments of the present application, compared with the prior art, is provided with a water tank. An installation frame is fixedly installed inside the water tank. A sliding frame is slidably arranged on the installation frame in the vertical direction. A bottom cover is installed on the sliding frame, and a top cover is also installed on the top of the sliding frame. The position of the top cover on the sliding frame has the freedom to be adjusted in the vertical direction. Sealing gaskets for sealingly connecting with the port of the fire valve housing are arranged on both the top cover and the bottom cover. When the fire valve housing is squeezed between the bottom cover and the top cover, the inside of the fire valve housing is a sealed cavity, and the outside air supply equipment is connected through the gas passage on the top cover to pressurize the inside of the fire valve housing. Finally, the sliding frame is moved downward to immerse the fire valve housing in the liquid inside the water tank. Observe whether there are bubbles generated, so as to realize the detection of the air tightness of the fire valve housing. The operation is simple and easy to observe, effectively improving the detection efficiency of the air tightness test of the fire valve. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the workpiece air tightness test equipment provided by the embodiment of the present utility model;

[0024] Figure 2 is a schematic installation structure diagram of the baffle provided by the embodiment of the present utility model;

[0025] Figure 3 is a schematic installation structure diagram of the support plate and the support tray provided by the embodiment of the present utility model.

[0026] Description of the Reference Numerals:

[0027] 1. Water tank; 11. Support plate; 2. Installation frame; 21. Column; 22. Baffle; 3. Sliding frame; 31. Support tray; 311. Rib; 4. Bottom cover; 5. Top cover; 6. Pushing member; 61. Pulling member; 7. Limiting component; 71. Fixed block; 72. Limiting member; 8. Power component; 81. Sprocket; 82. Chain; 83. Power member. Detailed Embodiment

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] Please refer to Figures 1 to 3, the airtightness test equipment for the workpiece provided by the present utility model will be described. The airtightness test equipment for the workpiece includes a water tank 1, a mounting frame 2, a sliding frame 3, a bottom cover 4, a top cover 5, and a pushing member 6. The mounting frame 2 is installed inside the water tank 1; the sliding frame 3 is installed on the mounting frame 2, and the position of the sliding frame 3 on the mounting frame 2 has the freedom to be adjusted in the vertical direction, and the sliding frame 3 can slide into the inside of the water tank 1; the bottom cover 4 is installed on the sliding frame 3 and is used to cover the mouth at the bottom end of the fire valve housing and is hermetically connected to the fire valve housing; the top cover 5 is slidably arranged on the sliding frame 3 in the vertical direction and is used to cover and seal the mouth at the top end of the fire valve housing. A gas passage for filling gas into the inside of the fire valve housing is provided on the top cover 5; the pushing member 6 is installed between the top cover 5 and the sliding frame 3 and is used to push the top cover 5 to move on the sliding frame 3.

[0030] Compared with the prior art, the airtightness test equipment for the workpiece provided in this embodiment is provided with a water tank 1. An installation frame 2 is fixedly installed inside the water tank 1. A sliding frame 3 is slidably arranged on the installation frame 2 in the vertical direction. A bottom cover 4 is installed on the sliding frame 3, and a top cover 5 is also installed on the top of the sliding frame 3. The position of the top cover 5 on the sliding frame 3 has the freedom to be adjusted in the vertical direction. Sealing gaskets for hermetically connecting to the ports of the fire valve housing are provided on both the top cover 5 and the bottom cover 4. When the fire valve housing is squeezed between the bottom cover 4 and the top cover 5, the inside of the fire valve housing is a sealed cavity, and the outside air supply equipment is connected through the gas passage on the top cover 5 to pressurize the inside of the fire valve housing. Finally, the sliding frame 3 is moved downward to immerse the fire valve housing in the liquid inside the water tank 1. Observe whether bubbles are generated, so as to realize the detection of the airtightness of the fire valve housing. The operation is simple and convenient for observation, effectively improving the detection efficiency of the airtightness test of the fire valve.

[0031] Specifically, in this embodiment, the above-mentioned sliding frame 3 is a square frame. The fixed end of the pushing member 6 is fixedly installed on the top cross beam of the square frame, and the chassis is installed on the cross beam at the bottom of the square frame.

[0032] Specifically, in this embodiment, when performing the airtightness test on the fire valve housing, only the two largest mouths at both ends are left, and the remaining holes are temporarily blocked before the airtightness test. The airtightness test of the inside of the fire valve housing is carried out by respectively abutting the two port parts on the fire valve housing against the sealing gaskets on the bottom cover 4 and the top cover 5.

[0033] In some embodiments, the above-mentioned top cover 5 can adopt the structure as Figure 1 shown. Refer to Figure 1, the top cover 5 abuts against the driving end of the driving member 6, and a pulling member 61 for pulling the top cover 5 to abut against the driving member 6 is provided between the top cover 5 and the sliding frame 3. The driving member 6 is a hydraulic cylinder, and the fixed end of the driving member 6 is fixedly installed on the sliding frame 3. The driving end of the driving member 6 extends downward, and the top cover 5 abuts against the bottom end of the driving end of the driving member 6. The pulling member 61 is a tension spring. A pull rod is fixedly installed on the outer side of the top cover 5, and the pulling member 61 is installed between the end of the pull rod and the sliding frame 3, so that the top cover 5 can always abut against the driving end of the driving member 6.

[0034] Preferably, in this embodiment, an annular sealing ring is installed at the bottom end of the top cover 5. When installing the fire valve housing, the port of the fire valve housing abuts against the annular sealing ring. And a gas joint communicating with the gas passage is installed on the side wall of the top cover 5, and the air outlet hole of the gas passage is located inside the annular sealing ring.

[0035] Specifically, in this embodiment, the number of the pulling members 61 is multiple, and the multiple pulling members 61 are evenly arranged at intervals along the circumferential direction of the top cover 5 on the outer side of the top cover 5.

[0036] In some embodiments, the above-mentioned mounting frame 2 can adopt a structure as shown in Figure 1 , Figure 2 . Referring to Figure 1 , Figure 2 together, a chute for accommodating the sliding frame 3 is recessed on the inner wall of the mounting frame 2. The number of the chutes is two, and the two chutes are located on both sides of the sliding frame 3, and the length direction of the chutes is arranged in the vertical direction. The mounting frame 2 includes two columns 21, the two columns 21 are arranged in the vertical direction, and the bottom ends of the two columns 21 are fixedly installed at the bottom of the water tank 1. Chutes are provided on the opposite sides of the two columns 21, and the length direction of the chutes is arranged in the vertical direction. The sliding frame 3 is located between the two columns 21, and the two opposite outer side walls of the sliding frame 3 are respectively located inside the chutes. The chutes are provided for guiding the sliding frame 3 to slide in the vertical direction.

[0037] In some embodiments, the above-mentioned mounting frame 2 can adopt a structure as shown in Figure 1 , Figure 2 . Referring to Figure 1 , Figure 2, the mounting bracket 2 includes two columns 21 arranged vertically. The two columns 21 are spaced apart, and two baffles 22 are fixedly installed on the outer sides of the columns 21. The two baffles 22 and the outer side walls of the columns 21 form a chute. The baffle 22 is processed from angle steel. One wing plate of the baffle 22 is fixedly installed on the outer side wall of the column 21, and the two baffles 22 are respectively installed on two opposite outer side walls of the column 21. The wing plates on the other side of the two baffles 22 form two opposite inner walls of the chute. When in use, both sides of the sliding frame 3 are located inside the chute, facilitating the guiding of the sliding frame 3 to move vertically. The setting of the baffle 22 facilitates the processing of the chute and the installation of the sliding frame 3.

[0038] In some embodiments, the above-mentioned sliding frame 3 can adopt a structure as shown in Figure 1 , Figure 3 . Referring to Figure 1 , Figure 3 , a support plate 31 is fixedly installed on the sliding frame 3. The bottom cover 4 is freely placed on the support plate 31, and a support plate 11 for placing the bottom cover 4 is also fixedly installed on the top of the water tank 1. When the sliding frame 3 moves upward, the support plate 31 and the support plate 11 form a moving platform for the movement of the bottom cover 4. A support plate 31 is fixedly installed on the bottom cross beam of the sliding frame 3, and the bottom cover 4 is freely placed on the support plate 31. The support plate 11 extends outward on the top of the water tank 1. When in use, the position of the sliding frame 3 can be lifted to make the support plate 31 flush with the support plate 11. The bottom cover 4 can be placed on the support plate 11, and then the fire valve housing can be placed on the bottom cover 4. By pushing the bottom cover 4, the bottom cover 4 can be moved to the support plate 31, facilitating the installation of the fire valve housing.

[0039] Preferably, in this embodiment, one side edge of the support plate 31 is slidably engaged with the inner wall of the water tank 1 on the side where the support plate 11 is provided. A handle for facilitating the pushing or pulling of the bottom cover 4 to move is fixedly installed on the bottom cover 4.

[0040] In some embodiments, the above-mentioned support plate 31 and support plate 11 can adopt a structure as shown in Figure 3 . Referring to Figure 3 , convex ribs 311 for guiding the movement of the bottom cover 4 are provided on both the support plate 31 and the support plate 11. Two convex ribs 311 are provided on both the support plate 31 and the support plate 11. The two convex ribs 311 on the support plate 31 form a gap for accommodating the bottom cover 4, and the bottom cover 4 is slidably arranged between the two convex ribs 311. Thereby, it is convenient to determine the installation position of the bottom cover 4.

[0041] In some embodiments, the above-mentioned support plate 31 can adopt a structure as shown in Figure 3 . Referring to Figure 3, a limiting component 7 for limiting the movement of the bottom cover 4 is further installed on the pallet 31. When the bottom cover 4 abuts against the limiting component 7, the bottom cover 4 is located directly below the top cover 5. A limiting component 7 for limiting the installation position of the bottom cover 4 is also provided on the pallet 31. The combination between the limiting component 7 and the rib 311 can determine the installation position of the bottom cover 4. When the bottom cover 4 is pushed upward onto the pallet 31 and abuts against the limiting component 7, the mouth at the top of the fire valve housing is directly opposite the gasket on the top cover 5. Thus, when the top cover 5 moves downward, the top cover 5 can abut against the mouth at the top of the fire valve housing, facilitating the alignment of the relative positions between the bottom cover 4 and the top cover 5.

[0042] In some embodiments, the above-mentioned limiting component 7 can adopt the structure as Figure 3 shown. Refer to Figure 3 , the limiting component 7 includes a fixed block 71 fixedly installed on the pallet 31 and a limiting member 72 threadedly connected to the fixed block 71. The end of the limiting member 72 is used to limit the movement of the bottom cover 4. The fixed block 71 is fixedly installed on the pallet 31 by welding. A limiting member 72 is threadedly connected to the fixed block 71. The limiting member 72 is a bolt and is arranged radially along the top cover 5. One end of the limiting member 72 can abut against the outer side surface of the bottom cover 4 to limit the position of the bottom cover 4. Specifically, the number of the limiting members 72 is multiple, and the multiple limiting members 72 are arranged at intervals, which can limit the position of the chassis in multiple directions.

[0043] Preferably, in this embodiment, a fixing member is further threadedly connected to the limiting member 72. The fixing member abuts against the outer side surface of the fixed block 71, and the setting of the fixing member is used to fix the position of the limiting member 72.

[0044] In some embodiments, the above-mentioned sliding frame 3 can adopt the structure as Figure 1 shown. Refer to Figure 1 , a power component 8 for driving the sliding frame 3 to move upward is arranged on the mounting frame 2. The power component 8 includes a sprocket 81, a chain 82 and a power member 83. The sprocket 81 is rotatably arranged at the top of the mounting frame 2; the chain 82 is meshed with the sprocket 81, and one end of the chain 82 is fixedly installed on the sliding frame 3; the power member 83 is installed on the mounting frame 2 or the water tank 1, and the driving end of the power member 83 is connected to the other end of the chain 82 for driving the chain 82 to move. The chain 82 is wound around the outside of the sprocket 81, and both ends of the chain 82 are respectively connected to the sliding frame 3 and the driving end of the power member 83. The power member 83 is a cylinder or a liquid oxygen cylinder, and the fixed end of the power member 83 is fixedly installed on the mounting frame 2 or the outer side surface of the water tank 1. When the driving end of the power member 83 moves upward, the sliding frame 3 moves downward according to its own gravity. When the driving end of the power member 83 moves downward, the chain 82 will be pulled to make the chain 82 pull the sliding frame 3 upward, thereby realizing the adjustment of the position of the sliding frame 3.

[0045] Specifically, in this embodiment, when the sliding carriage 3 abuts against the bottom of the water tank 1, the fire valve housing located on the sliding carriage 3 is completely immersed in the liquid inside the water tank 1.

[0046] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements 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. A workpiece air tightness test equipment, characterized in that: include: Water tank (1); A mounting frame (2) mounted inside the water tank (1); A sliding frame (3) is mounted on the mounting frame (2), the position of the sliding frame (3) on the mounting frame (2) having a degree of freedom of adjustment in a vertical direction, and the sliding frame (3) can slide into the interior of the water tank (1); A bottom cover (4) is mounted on the sliding frame (3) and is used to cover the opening at the bottom end of the fire valve housing and is sealed to the fire valve housing; A top cover (5) is slidably arranged on the sliding frame (3) in a vertical direction and is used to cover the opening sealed at the top end of the fire valve housing. The top cover (5) is provided with a gas passage for filling gas into the interior of the fire valve housing; A pushing member (6) is installed between the top cover (5) and the sliding frame (3) and is used to push the top cover (5) to move on the sliding frame (3).

2. The air tightness test equipment for a product as claimed in claim 1, characterized in that: The top cover (5) abuts against the driving end of the pushing member (6), and a pulling member (61) for pulling the top cover (5) to abut against the pushing member (6) is provided between the top cover (5) and the sliding frame (3).

3. The air tightness test equipment for a product as claimed in claim 1, characterized in that: A slide groove for accommodating the sliding frame (3) is recessed on the inner wall of the mounting frame (2), and the number of the slide grooves is two. The two slide grooves are located on both sides of the sliding frame (3), and the length direction of the slide groove is arranged along the vertical direction.

4. The air tightness test equipment for a product as claimed in claim 3, characterized in that: The mounting frame (2) comprises two columns (21) arranged in a vertical direction, the two columns (21) are arranged at an interval, and two baffles (22) are fixedly installed on the outer sides of the columns (21), and the two baffles (22) and the outer side walls of the columns (21) form the sliding groove.

5. The air tightness test equipment for a product as claimed in claim 1, characterized in that: A support plate (31) is fixedly mounted on the sliding frame (3), the bottom cover (4) is freely placed on the support plate (31), and a support plate (11) for placing the bottom cover (4) is also fixedly mounted on the top of the water tank (1); when the sliding frame (3) moves upward, the support plate (31) and the support plate (11) form a moving platform for moving the bottom cover (4).

6. The air tightness test equipment for a product as claimed in claim 5, characterized in that: The support plate (31) and the supporting plate (11) are both provided with convex ribs (311) for guiding the movement of the bottom cover (4).

7. The air tightness test equipment for a product as claimed in claim 5, characterized in that: A limiting assembly (7) for limiting the movement of the bottom cover (4) is also mounted on the support plate (31); when the bottom cover (4) abuts against the limiting assembly (7), the bottom cover (4) is located directly below the top cover (5).

8. The air tightness test equipment for a product as claimed in claim 7, characterized in that: The limiting assembly (7) comprises a fixing block (71) fixedly mounted on the supporting plate (31) and a limiting member (72) threadedly connected to the fixing block (71), wherein the end of the limiting member (72) is used to limit the movement of the bottom cover (4).

9. The air tightness test equipment for a product as claimed in claim 1, characterized in that: The mounting frame (2) is provided with a power assembly (8) for driving the sliding frame (3) to move upward, and the power assembly (8) comprises: A sprocket (81) rotatably mounted on the top of the mounting frame (2); A chain (82) is meshed with the sprocket (81), and one end of the chain (82) is fixedly mounted on the sliding frame (3); A power member (83) is mounted on the mounting frame (2) or the water tank (1); a driving end of the power member (83) is connected to the other end of the chain (82) for driving the chain (82) to move.

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