Steel pipe quick connecting device

Abstract

The utility model discloses a steel pipe quick connection device, and particularly relates to the technical field of steel pipe quick connection, which comprises a quick connection cylinder and sealing sleeves in threaded connection with the left end and the right end of the quick connection cylinder, sealing air bags are fixedly mounted on the left side and the right side in the quick connection cylinder, and two air transmission cylinders are fixedly mounted on the outer surface of the quick connection cylinder. And gas conveying pipes are fixedly mounted on one sides of the outer surfaces of the two gas conveying cylinders. According to the steel pipe quick connecting device, in actual work, the two sealing sleeves are arranged on the outer surfaces of the two steel pipes to be in butt joint in a sleeved mode, one ends of the two steel pipes are both inserted into the quick connecting cylinder, the two sealing sleeves are rotated to be in threaded connection with the quick connecting cylinder, the rubber sealing rings can be inserted into gaps between the steel pipes and the quick connecting cylinder, and the steel pipes can be in butt joint with the quick connecting cylinder. And the first threaded rod is rotated to push the two pistons to descend, so that air in the two air conveying barrels is conveyed into the sealing air bags, the two sealing air bags are expanded, and therefore the gap between the steel pipe and the inner wall of the quick connecting barrel can be sealed twice, and the sealing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of quick-connect steel pipe technology, and specifically to a quick-connect steel pipe device. Background Technology

[0002] Explosion-proof electrical equipment mainly refers to electrical equipment used in hazardous locations and flammable and explosive environments. Commonly used explosion-proof electrical equipment mainly includes explosion-proof motors, explosion-proof transformers, explosion-proof switches, and explosion-proof lighting fixtures. Some explosion-proof electrical equipment is used in conjunction with steel pipes to transmit certain media. When installing steel pipes, quick-connect devices are often used to quickly assemble and splice the pipes to meet the usage requirements of different explosion-proof electrical equipment.

[0003] A search revealed, for example, a utility model with publication number CN212273313U, which discloses a quick pipe connection device, including an upper clamp and a lower clamp. The two ends of the upper and lower clamps are movably connected by fastening bolts and nuts. The middle of the upper and lower clamps forms a hollow space to accommodate the pipe to be connected. This utility model can realize the quick connection of pipes of various diameters. However, when connecting pipes of various diameters, this utility model will cause a large gap between the upper and lower clamps and the pipe to be connected, which will lead to poor sealing effect. Therefore, in order to solve the above defects, the inventor proposes a quick connection device for steel pipes. Utility Model Content

[0004] Therefore, this utility model provides a quick-connect device for steel pipes to solve the problem of poor sealing effect of quick-connect devices in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A quick-connect device for steel pipes includes a quick-connect cylinder, sealing sleeves threaded to both ends of the quick-connect cylinder, sealing airbags fixedly installed on both sides of the inside of the quick-connect cylinder, two air supply cylinders fixedly installed on the outer surface of the quick-connect cylinder, and air supply pipes fixedly installed on one side of the outer surface of each of the two air supply cylinders. The two air supply pipes are respectively fixedly connected to the two sealing airbags. Piston rods are slidably connected to the outer top surfaces of the two air supply cylinders, with a portion of each piston rod located inside the two air supply cylinders and the other portion of each piston rod located outside the two air supply cylinders. A piston is fixedly installed at the end of each piston rod located inside the air supply cylinder, and a connecting plate is fixedly installed at the end of each piston rod located outside the air supply cylinder. A first threaded rod is rotatably connected to the outer surface of the quick-connect cylinder on one side of the air supply cylinder, and the connecting plate is threadedly connected to the first threaded rod.

[0007] Preferably, a rubber sealing ring is fixedly installed on the side of the sealing sleeve near the quick-connect sleeve, and two fixing rings are fixedly installed on the side of the sealing sleeve away from the rubber sealing ring, with two connecting holes opened on the opposite side of the two fixing rings.

[0008] Preferably, the quick-connect cylinder has two threaded rods threadedly connected to both sides of its interior, and a fixed plate is rotatably connected to one end of each of the two threaded rods. The two fixed plates are located between the two sealing airbags. Two telescopic rods are fixedly installed on both sides of the second threaded rods inside the quick-connect cylinder, and the four telescopic rods are respectively fixedly connected to the two fixed plates.

[0009] Preferably, a handle is fixedly installed at one end of each of the two second threaded rods extending outside the quick-connect sleeve.

[0010] Preferably, two movable rods are hinged to both sides of the outer surface of the quick-connect cylinder, and a reinforcing ring is fixedly installed on one side of the two movable rods. Two limiting blocks are rotatably connected to one side of the two reinforcing rings, and two limiting holes are opened on the other side of the two reinforcing rings.

[0011] Preferably, the dimensions of the two limiting blocks are the same as the dimensions of the two limiting holes, and the cross-sectional shape of the two limiting blocks is rectangular, just like the cross-sectional shape of the two limiting holes.

[0012] This utility model has the following advantages:

[0013] This utility model discloses a quick-connect device for steel pipes. By setting up sealing airbags and sealing sleeves, in actual operation, two sealing sleeves are placed on the outer surfaces of two steel pipes to be connected. Then, one end of each steel pipe is inserted into the inside of the quick-connect cylinder. The two sealing sleeves are then rotated to connect them to the quick-connect cylinder by threads. The rubber sealing ring is then inserted into the gap between the steel pipe and the quick-connect cylinder. Then, the first threaded rod is rotated to push the two pistons down, so that the air in the two air supply cylinders is transmitted to the sealing airbags, causing the two sealing airbags to expand. This allows for a double seal between the steel pipe and the inner wall of the quick-connect cylinder, thereby improving the sealing effect. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. disclosed in this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the quick-connect sleeve of this utility model;

[0018] Figure 3 This is a schematic diagram of the sealing sleeve structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the fixing plate structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the reinforcing ring structure of this utility model.

[0021] In the diagram: 1. Quick-connect sleeve; 2. Sealing sleeve; 101. Sealing airbag; 102. Air supply pipe; 103. Air supply cylinder; 104. Piston; 105. Piston rod; 106. Connecting plate; 107. First threaded rod; 201. Rubber sealing ring; 202. Fixing ring; 203. Connecting hole; 1011. Second threaded rod; 1012. Telescopic rod; 1013. Fixing plate; 1021. Movable rod; 1022. Reinforcing ring; 1023. Limiting hole; 1024. Limiting block. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] This utility model discloses a quick-connect device for steel pipes, such as Figure 1-5 As shown, it includes a quick-connect sleeve 1, sealing sleeves 2 threaded to the left and right ends of the quick-connect sleeve 1, and sealing airbags 101 fixedly installed on both the left and right sides inside the quick-connect sleeve 1. When gas is injected into the sealing airbags 101, the sealing airbags 101 will expand to seal the gap between the steel pipe and the inner wall of the quick-connect sleeve 1.

[0024] Two air cylinders 103 are fixedly installed on the outer surface of the quick-connect tube 1, and an air supply pipe 102 is fixedly installed on one side of the outer surface of each of the two air cylinders 103. The two air supply pipes 102 are fixedly connected to two sealing air bags 101 respectively. The air in the air cylinder 103 can be transmitted to the sealing air bag 101 through the air supply pipes 102.

[0025] Piston rods 105 are slidably connected to the outer top surfaces of both air cylinders 103. Parts of the two piston rods 105 are located inside the two air cylinders 103, and the other parts are located outside the two air cylinders 103. A piston 104 is fixedly installed at one end of the two piston rods 105 inside the air cylinder 103. When the piston rods 105 move up and down, they will drive the pistons 104 to move up and down. When the pistons 104 descend inside the air cylinder 103, they will transfer the air inside the air cylinder 103 to the sealing airbag 101. When the pistons 104 rise inside the air cylinder 103, they will draw the air out of the sealing airbag 101 into the air cylinder 103.

[0026] Furthermore, a connecting plate 106 is fixedly installed on one end of the two piston rods 105 located outside the gas cylinder 103. A first threaded rod 107 is rotatably connected to the outer surface of the quick-connect cylinder 1 located on one side of the gas cylinder 103. The connecting plate 106 is threadedly connected to the first threaded rod 107. By rotating the first threaded rod 107, the connecting plate 106 can drive the two piston rods 105 to rise and fall, so as to inject gas into the two sealing airbags 101 at the same time.

[0027] A rubber sealing ring 201 is fixedly installed on the side of the sealing sleeve 2 closest to the quick-connect sleeve 1, and two fixing rings 202 are fixedly installed on the side of the sealing sleeve 2 away from the rubber sealing ring 201. Two connecting holes 203 are opened on the opposite side of the two fixing rings 202. The sealing sleeve 2 is placed on the outer surface of the steel pipe to be connected. When the two steel pipes are inserted into the quick-connect sleeve 1, the two sealing sleeves 2 can be rotated to make the two sealing sleeves 2 threadedly connected to the two ends of the quick-connect sleeve 1. The rubber sealing ring 201 will be inserted into the gap between the steel pipe and the quick-connect sleeve 1 to provide initial sealing. Then, the bolt can be inserted into the two overlapping connecting holes 203 and fixed with nuts to complete the installation of the sealing sleeve 2 and the quick-connect sleeve 1.

[0028] The quick-connect sleeve 1 has two threaded rods 1011 threaded on both sides inside, and a fixed plate 1013 is rotatably connected to one end of each of the two threaded rods 1011. The two fixed plates 1013 are located between the two sealing airbags 101. Two telescopic rods 1012 are fixedly installed on both sides of the second threaded rods 1011 inside the quick-connect sleeve 1, and the four telescopic rods 1012 are fixedly connected to the two fixed plates 1013 respectively. Rotating the second threaded rods 1011 can push the fixed plates 1013 to move. When the two fixed plates 1013 are close to each other, the two steel pipes inserted into the quick-connect sleeve 1 can be clamped and fixed.

[0029] Each of the two second threaded rods 1011 has a handle fixedly installed at one end extending to the outside of the quick-connect sleeve 1.

[0030] Two movable rods 1021 are hinged to both sides of the outer surface of the quick-connect sleeve 1, and a reinforcing ring 1022 is fixedly installed on the opposite side of the two movable rods 1021. Two limiting blocks 1024 are rotatably connected to one side of the opposite side of the two reinforcing rings 1022, and two limiting holes 1023 are opened on the other side of the opposite side of the two reinforcing rings 1022. When the two steel pipes are inserted into the quick-connect sleeve 1, the two movable rods 1021 can be flipped to make the reinforcing rings 1022 move closer to each other until the limiting blocks 1024 pass through the limiting holes 1023. Then the limiting blocks 1024 are rotated so that they do not coincide with the limiting holes 1023, so that the two reinforcing rings 1022 clamp and fix the steel pipes.

[0031] The dimensions of the two limiting blocks 1024 are the same as the dimensions of the two limiting holes 1023, and the cross-sectional shape of the two limiting blocks 1024 and the cross-sectional shape of the two limiting holes 1023 are both rectangular.

[0032] The working principle of this utility model is as follows: Two sealing sleeves 2 are fitted onto the outer surfaces of two steel pipes to be connected. When the two steel pipes are inserted into the quick-connect sleeve 1, the two sealing sleeves 2 can be rotated to make the two sealing sleeves 2 threadedly connected to the two ends of the quick-connect sleeve 1. The rubber sealing ring 201 will then be inserted into the gap between the steel pipe and the quick-connect sleeve 1 to provide initial sealing. Then, bolts can be inserted into the two overlapping connection holes 203 and fixed with nuts to complete the installation of the sealing sleeves 2 and quick-connect sleeve 1. Afterward, the two second threaded rods 1011 are rotated to push the two fixing plates 1013 closer together. The two steel pipes inserted into the quick-connect cylinder 1 are clamped and fixed. Then, the two movable rods 1021 are flipped so that the reinforcing rings 1022 are brought closer to each other until the limiting block 1024 passes through the limiting hole 1023. Then, the limiting block 1024 is rotated so that it does not coincide with the limiting hole 1023, so that the two reinforcing rings 1022 clamp and fix the steel pipes. Then, the first threaded rod 107 is rotated to push the two pistons 104 down, so that the air in the two air cylinders 103 is transmitted to the sealing airbags 101, causing the two sealing airbags 101 to expand, so as to perform a secondary seal on the gap between the steel pipes and the inner wall of the quick-connect cylinder 1.

[0033] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A quick-connect device for steel pipes, comprising a quick-connect cylinder (1), characterized in that: The quick-connect sleeve (1) is threaded to the left and right ends of the sealing sleeve (2). Sealing airbags (101) are fixedly installed on both the left and right sides inside the quick-connect sleeve (1). Two air delivery cylinders (103) are fixedly installed on the outer surface of the quick-connect sleeve (1), and air delivery pipes (102) are fixedly installed on one side of the outer surface of each of the two air delivery cylinders (103). The two air delivery pipes (102) are respectively fixedly connected to the two sealing airbags (101). A piston rod (105) is slidably connected to the top surface of each of the two air delivery cylinders (103), and a portion of each piston rod (105) is respectively positioned... Inside the two gas cylinders (103), the other part of the two piston rods (105) are located outside the two gas cylinders (103). The piston rods (105) inside the gas cylinders (103) are fixedly mounted with pistons (104), and the piston rods (105) outside the gas cylinders (103) are fixedly mounted with connecting plates (106). The outer surface of the quick-connect cylinder (1) is rotatably connected to a first threaded rod (107) on one side of the gas cylinder (103), and the connecting plate (106) is threadedly connected to the first threaded rod (107).

2. The quick-connect device for steel pipes according to claim 1, characterized in that: A rubber sealing ring (201) is fixedly installed on the side of the sealing sleeve (2) close to the quick-connect sleeve (1), and two fixing rings (202) are fixedly installed on the side of the sealing sleeve (2) away from the rubber sealing ring (201). Two connecting holes (203) are opened on the opposite side of the two fixing rings (202).

3. The quick-connect device for steel pipes according to claim 1, characterized in that: The quick-connect cylinder (1) has two threaded rods (1011) threaded on both sides inside, and two fixed plates (1013) are rotatably connected to the opposite ends of the two second threaded rods (1011). The two fixed plates (1013) are located between the two sealing airbags (101). Two telescopic rods (1012) are fixedly installed on both sides of the second threaded rods (1011) inside the quick-connect cylinder (1), and the four telescopic rods (1012) are fixedly connected to the two fixed plates (1013) respectively.

4. A quick-connect device for steel pipes according to claim 3, characterized in that: Each of the two second threaded rods (1011) has a handle fixedly installed at one end extending to the outside of the quick-connect sleeve (1).

5. A quick-connect device for steel pipes according to claim 1, characterized in that: Two movable rods (1021) are hinged to both sides of the outer surface of the quick-connect cylinder (1), and a reinforcing ring (1022) is fixedly installed on the opposite side of the two movable rods (1021). Two limiting blocks (1024) are rotatably connected to one side of the two reinforcing rings (1022), and two limiting holes (1023) are opened on the other side of the two reinforcing rings (1022).

6. A quick-connect device for steel pipes according to claim 5, characterized in that: The dimensions of the two limiting blocks (1024) are the same as those of the two limiting holes (1023), and the cross-sectional shape of the two limiting blocks (1024) and the cross-sectional shape of the two limiting holes (1023) are both rectangular.

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