Pressure testing device for automobile pipe fitting

Abstract

The utility model belongs to the field of automobile part connection, and particularly relates to an automobile pipe fitting pressure testing device, which comprises a working table, a clamping mechanism, an air pump, a top sealing mechanism and a rubber sealing sleeve, the working table is provided with a through hole, the air pump is fixed below the working table, the air pump is provided with an air outlet pipe, and the air outlet pipe is provided with an air inlet. The air outlet pipe can penetrate through the through hole to be located on the upper surface of the workbench, the rubber sealing sleeve is fixedly arranged outside the air outlet pipe in a sleeving mode, the clamping mechanism comprises a fixed clamping jaw and a movable clamping jaw which are located on the two sides of the air outlet pipe respectively, and the top sealing mechanism can automatically ascend and descend. The chuck of the movable clamping jaw and the chuck of the fixed clamping jaw are both arc-shaped sections, clamping is more stable, damage to a pipe fitting caused by line contact is avoided, the movable clamping jaw can automatically move in a reciprocating mode, and then the movable clamping jaw is matched with the fixed clamping jaw to clamp or loosen the pipe fitting. The trouble that a clamping plate of an existing pressure testing device needs to be manually opened and pressed down is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of compressive testing tools, and particularly relates to a pressure testing device for automobile pipe fittings. Background Art

[0002] During the use of pipe fittings such as the oil pipe assembly and air-conditioning pipe of an automobile, the pipe fittings may burst due to excessive pressure, affecting the use safety and even threatening the lives of passengers. Therefore, after the pipe fittings are produced and before they are used, it is a necessary procedure to conduct a pressure test on the pipe fittings to determine the pressure-bearing range of the pipe fittings. Generally, the pressure test process for pipe fittings is to connect one end of the pipe fitting to the air outlet of an air pump, then seal the other end of the pipe fitting with a sealing mechanism, and finally start the air pump to introduce the gas released by the air pump into the pipe fitting to determine the pressure-bearing capacity of the pipe fitting.

[0003] The existing pipe fitting pressure testing device includes a workbench, an air pump and clamping plates. When conducting a pressure test on a pipe fitting, the pipe fitting is horizontally placed on the workbench, the clamping plates press on the upper part of the pipe fitting, and the clamping plates and the workbench cooperate with each other to fix the pipe fitting. One end of the pipe fitting is blocked by a sealing mechanism, and high-pressure gas generated by the air pump is introduced into the other end. However, this device has two defects: when the pipe fitting is fixed, its circumferential surface is clamped, only in line contact, including the contact between the workbench and the pipe fitting and the contact between the clamping plates and the pipe fitting. The stress borne by the contact part of the pipe fitting is relatively large, making the pipe fitting easy to be damaged; secondly, it is necessary to manually open and press the clamping plates, the operation is relatively troublesome, and the pressure test efficiency is relatively low. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems that when conducting a pressure test on pipe fittings such as the oil pipe assembly and air-conditioning pipe of an automobile at present, the pipe fitting is in line contact when being fixed, which is easy to damage the pipe fitting, and the clamping plates need to be manually opened and closed, the operation is relatively troublesome, and the pressure test efficiency is relatively low.

[0005] To solve the above technical problems, the utility model provides a pressure testing device for automobile pipe fittings, which includes a workbench, a clamping mechanism, an air pump, a top sealing mechanism and a rubber sealing sleeve. The workbench is provided with a through hole. The air pump is fixed below the workbench. The air pump is provided with an air outlet pipe, and the air outlet pipe can pass through the through hole and be located on the upper surface of the workbench. The rubber sealing sleeve is completely sleeved and fixed outside the air outlet pipe. The aperture of the through hole is smaller than the aperture of the pipe fitting. The clamping mechanism includes a fixed clamping jaw and a movable clamping jaw respectively located on both sides of the air outlet pipe. The fixed clamping jaw is fixed on the upper surface of the workbench. The clamping heads of the fixed clamping jaw and the movable clamping jaw are both arc-shaped sections. The movable clamping jaw is slidably arranged on the upper surface of the workbench and can move away from or towards the air outlet pipe. The fixed clamping jaw and the movable clamping jaw can cooperate with each other to clamp the pipe fitting. The top sealing mechanism can be automatically lifted and lowered to seal the top end of the pipe fitting or move away from the pipe fitting.

[0006] Preferably, the clamping mechanism further includes a transmission mechanism and a driving member. The transmission mechanism includes two sets of slider-rail pairs and a ball screw pair. The movable clamping jaw is fixed to two sliders and a ball nut at the same time. The driving member is a hydraulic rotary cylinder. The rotating shaft of the hydraulic rotary cylinder is concentrically fixed to one end of the screw rod, and the movable clamping jaw is fixed to the ball nut.

[0007] Preferably, the movable clamping jaw includes a first chuck and a first connecting frame. The first chuck is fixed to the top of the first connecting frame, and the bottom of the first connecting frame is fixed to two sliders and the ball nut at the same time. The fixed clamping jaw includes a second chuck and a second connecting frame. The second chuck is fixed to the bottom of the second connecting frame, and the bottom of the second connecting frame is fixed to the upper surface of the workbench.

[0008] Preferably, the first chuck and the first connecting frame are detachably connected, and the second chuck and the second connecting frame are detachably connected.

[0009] Preferably, the top sealing mechanism includes a cylinder and a rubber sealing cover. The cylinder is fixed above the workbench, and one end of the telescopic rod extended by the cylinder faces downward. The rubber sealing cover is fixed to the free end of the telescopic rod.

[0010] The technical solution of the present utility model has the following beneficial effects:

[0011] The present utility model is provided with a movable clamping jaw and a fixed clamping jaw. The chucks of both are arc segments, which just fit the arc surface of the pipe fitting. When the pipe fitting is clamped and fixed, it is in surface contact with both clamping jaws, so the clamping is more stable, and the damage to the pipe fitting caused by line contact is avoided. Moreover, the movable clamping jaw can move back and forth automatically, and then cooperate with the fixed clamping jaw to clamp or loosen the pipe fitting, avoiding the trouble of manually opening and pressing down the clamping plate in the existing pressure testing device and improving the pressure testing efficiency. Description of the Drawings

[0012] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a top view of the present utility model;

[0014] Figure 2 It is a front view of the present utility model.

[0015] Description of reference numerals: 1, workbench; 11, through hole; 21, transmission mechanism; 211, slider-rail pair; 212, ball screw pair; 22, driving member; 23, movable clamping jaw; 231, first chuck; 232, first connecting frame; 24, fixed clamping jaw; 241, second chuck; 242, second connecting frame; 3, air pump; 31, air outlet pipe; 4, top sealing mechanism; 41, cylinder; 42, rubber sealing cover; 5, rubber sealing sleeve. Detailed implementation manners

[0016] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0018] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0019] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] The utility model provides a pressure testing device for automobile pipe fittings, which includes a workbench 1, a clamping mechanism, an air pump 3, a top sealing mechanism 4, and a rubber sealing sleeve 5. The workbench 1 is provided with a through hole 11. The air pump 3 is fixed below the workbench 1. The air pump 3 is provided with an air outlet pipe 31. The air outlet pipe 31 can pass through the through hole 11 and be located on the upper surface of the workbench 1. The rubber sealing sleeve 5 is completely sleeved and fixed outside the air outlet pipe 31. The aperture of the through hole 11 is smaller than the aperture of the pipe fitting. The clamping mechanism includes a fixed clamping jaw 24 and a movable clamping jaw 23 respectively located on both sides of the air outlet pipe 31. The fixed clamping jaw 24 is fixed on the upper surface of the workbench 1. The clamping heads of the movable clamping jaw 23 and the fixed clamping jaw 24 are both arc-shaped sections. The movable clamping jaw 23 is slidably arranged on the upper surface of the workbench 1 and can move away from or towards the air outlet pipe 31. The fixed clamping jaw 24 and the movable clamping jaw 23 can cooperate with each other to clamp the pipe fitting. The top sealing mechanism 4 can be automatically lifted and lowered to seal the top end of the pipe fitting or move away from the pipe fitting.

[0021] The basic working principle of the utility model:

[0022] When a pressure resistance test needs to be carried out on the pipe fitting, first vertically sleeve the pipe fitting on the air outlet pipe 31 with the rubber sealing sleeve 5. This can not only position the center point of the pipe fitting, facilitate the clamping by the fixed clamping jaw 24 and the movable clamping jaw 23, but also make the bottom end of the pipe fitting communicate with the air outlet pipe 31 of the air pump 3. The rubber sealing sleeve 5 can play a role in sealing the bottom end of the pipe fitting to prevent air leakage due to gaps between the air outlet pipe 31 and the inside of the pipe fitting. At this time, the circumferential surface of the pipe fitting also abuts against the fixed clamping jaw 24. Then move the movable clamping jaw 23 to the position of the pipe fitting and cooperate with the fixed clamping jaw 24 to clamp the pipe fitting together. Then lower the top sealing mechanism 4 to seal the top end of the pipe fitting. Finally, start the air pump 3 to let high-pressure gas enter the pipe fitting to carry out a pressure test on the pipe fitting.

[0023] The clamping mechanism further includes a transmission mechanism 21 and a driving member 22. The transmission mechanism 21 includes two sets of slider-rail pairs 211 and a ball screw pair 212. The movable clamping jaw 23 is simultaneously fixed on two sliders and the ball nut. The driving member 22 is a hydraulic rotary cylinder. The rotary shaft of the hydraulic rotary cylinder is fixed to one end of the screw. The movable clamping jaw 23 is fixed to the ball nut. When the hydraulic rotary cylinder is started, the rotary shaft can rotate in two directions, forward and backward, thereby driving the ball nut to move back and forth on the screw, approaching or moving away from the pipe fitting. The cooperation of the slider and the rail provides a linear motion guiding function for the ball nut to slide on the screw, further reducing friction and wear, and improving the stability and durability of the ball nut and the screw.

[0024] The movable jaw 23 includes a first chuck 231 and a first connecting frame 232. The first chuck 231 is fixed to the top of the first connecting frame 232, and the bottom of the first connecting frame 232 is simultaneously fixed to two sliders and a ball nut. The fixed jaw 24 includes a second chuck 241 and a second connecting frame 242. The second chuck 241 is fixed to the bottom of the second connecting frame 242, and the bottom of the second connecting frame 242 is fixed to the upper surface of the workbench 1. The first connecting frame 232 connects the first chuck 231 to the ball nut and two sliders. The second connecting frame 242 connects the second chuck 241 to the workbench 1.

[0025] In order to be able to clamp pipe fittings with different pipe diameters, the first chuck 231 and the first connecting frame 232 are detachably connected, and the second chuck 241 and the second connecting frame 242 are detachably connected. In this way, the first chuck 231 and the second chuck 241 can be replaced according to different specifications of pipe fittings. This avoids the need for pipe fitting manufacturers to produce clamping mechanisms of various specifications and reduces costs.

[0026] The top sealing mechanism includes a cylinder 41 and a rubber sealing cover 42. The cylinder 41 is fixed above the workbench 1, and one end of the telescopic rod extended by the cylinder 41 faces downward. The rubber sealing cover 42 is fixed to the free end of the telescopic rod. After the pipe fitting is clamped by the clamping mechanism, the elongation control button of the telescopic rod of the cylinder 41 can be pressed, and the telescopic rod of the cylinder 41 extends to move the rubber sealing cover 42 downward. The rubber sealing cover 42 just covers the top end of the pipe fitting to seal the top end. After the pipe fitting completes the compressive test, the shortening control button of the telescopic rod of the cylinder 41 is pressed, and the telescopic rod shortens to raise the rubber sealing cover 42 for the clamping of the next pipe fitting.

[0027] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all implementation manners here. The obvious changes or variations derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A pressure test device for an automotive pipe fitting, comprising a workbench (1), a clamping mechanism, an air pump (3), and a top sealing mechanism (4), characterized in that it further comprises a rubber sealing sleeve (5). The workbench (1) is provided with a through hole (11). The air pump (3) is fixed below the workbench (1). The air pump (3) is provided with an air outlet pipe (31). The air outlet pipe (31) can pass through the through hole (11) and be located on the upper surface of the workbench (1). The rubber sealing sleeve (5) is completely sleeved and fixed outside the air outlet pipe (31). The aperture of the through hole (11) is smaller than the aperture of the pipe fitting. The clamping mechanism includes a fixed clamping jaw (24) and a movable clamping jaw (23) respectively located on both sides of the air outlet pipe (31). The fixed clamping jaw (24) is fixed on the upper surface of the workbench (1). The clamping heads of the movable clamping jaw (23) and the fixed clamping jaw (24) are both arc-shaped sections. The movable clamping jaw (23) is slidably arranged on the upper surface of the workbench (1) and can move away from or towards the air outlet pipe (31). The fixed clamping jaw (24) and the movable clamping jaw (23) can cooperate with each other to clamp the pipe fitting. The top sealing mechanism (4) can be automatically lifted and lowered to seal the top end of the pipe fitting or move away from the pipe fitting.

2. The pressure testing device for an automotive pipe fitting according to claim 1, wherein The clamping mechanism further comprises a transmission mechanism (21) and a driving member (22). The transmission mechanism (21) includes two sets of slider-rail pairs (211) and a ball screw pair (212). The movable clamping jaw (23) is simultaneously fixed on two sliders and a ball nut. The driving member (22) is a hydraulic rotary cylinder. The rotary shaft of the hydraulic rotary cylinder is concentrically fixed with one end of the screw. The movable clamping jaw (23) is fixed to the ball nut.

3. The pressure testing device for an automotive pipe fitting according to claim 2, wherein, The movable clamping jaw (23) includes a first clamping head (231) and a first connecting frame (232). The first clamping head (231) is fixed on the top of the first connecting frame (232). The bottom of the first connecting frame (232) is simultaneously fixed on two sliders and the ball nut. The fixed clamping jaw (24) includes a second clamping head (241) and a second connecting frame (242). The second clamping head (241) is fixed on the bottom of the second connecting frame (242). The bottom of the second connecting frame (242) is fixed on the upper surface of the workbench (1).

4. The pressure test device for an automotive pipe fitting according to claim 3, wherein, The first clamping head (231) is detachably connected to the first connecting frame (232), and the second clamping head (241) is detachably connected to the second connecting frame (242).

5. A pressure test device for an automotive pipe fitting according to claim 1, wherein, The top sealing mechanism includes a cylinder (41) and a rubber sealing cover (42). The cylinder (41) is fixed above the workbench (1), and one end of the telescopic rod extended by the cylinder (41) faces downward. The rubber sealing cover (42) is fixed to the free end of the telescopic rod.

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