Helium leak detection device for inner hole welding

Abstract

The utility model relates to the technical field of air tightness detection, in particular to a helium leak detection device for inner hole welding, which is characterized by comprising a workbench, a top seat, a lower sealing seat, an upper sealing seat, a leak detection left end head and a leak detection right end head, the lower sealing seat is horizontally fixed to the portion, under the top seat, of the workbench, the upper sealing seat is located over the lower sealing seat, a downward-pressing clamping electric cylinder is installed on the top seat, and the shaft outlet end of the downward-pressing clamping electric cylinder penetrates through the top seat to be connected with the upper sealing seat. A first mounting seat and a second mounting seat are fixed in the left end and the right end of the lower sealing seat respectively, the leakage detection left end is connected with the first mounting seat through a clamping electric cylinder, and the leakage detection right end is fixedly arranged on the side, facing the first mounting seat, of the second mounting seat. The design has the advantages of simple structure, convenience in use, practicability and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to a helium leak detection device for inner hole welding. Background Art

[0002] After welding, the sealing performance of pipe fittings needs to be tested, especially for pipe fittings with inner hole welding. Helium is often needed for airtightness testing of pipe fittings. However, once an airtightness problem occurs during the actual testing process, the helium used for testing will escape along the gaps left after welding, resulting in a waste of resources. Therefore, in order to solve the above problem, it is particularly important to design an airtight leak detection device that can recover all the helium. Summary of the invention

[0003] In order to solve the above problems, the utility model designs a helium leak detection device for inner hole welding, which can collect the escaped helium through the lower sealing seat and the upper sealing seat, thereby completing the recovery of all the helium, playing a role in saving resources and reducing costs.

[0004] In order to solve the above technical problems, the utility model provides a helium leak detection device for inner hole welding, which is characterized by comprising a workbench, a top seat, a lower sealing seat, an upper sealing seat, a left end of the leak detection and a right end of the leak detection, the top seat is located directly above the workbench and is fixedly connected to the workbench through a column, the lower sealing seat is horizontally fixed on the workbench directly below the top seat, the upper sealing seat is located directly above the lower sealing seat, a downward clamping electric cylinder is installed on the top seat, the shaft end of the downward clamping electric cylinder passes through the top seat and is connected to the upper sealing seat, a first mounting seat and a second mounting seat are fixed in the left and right ends of the lower sealing seat respectively, and the left end of the leak detection is connected to the first mounting seat through the clamping electric cylinder. The right end of the leak detection is fixedly arranged on the side of the second mounting seat facing the first mounting seat, and the upper sealing seat is closed on the lower sealing seat by pressing down to clamp the electric cylinder cover. After covering, the left and right ends between the upper sealing seat and the lower sealing seat are sealed respectively by the first mounting seat and the second mounting seat, and the second mounting seat is connected to a pressurized helium delivery pipeline on a side away from the first mounting seat, and air guide channels are provided in the right end of the leak detection and the second mounting seat at positions relative to the pressurized helium delivery pipeline, and an air pressure detection sensor is installed on the side of the left end of the leak detection facing the right end of the leak detection, and a helium recovery hole is provided at the bottom of the lower sealing seat, and the helium recovery hole is connected to the return air pipeline connection valve through a pipeline.

[0005] Further: the lower sealing seat and the upper sealing seat are both semi-cylindrical in shape, and two arc-shaped support plates are arranged on the inner wall of the lower sealing seat from left to right.

[0006] Furthermore, a sealing strip is disposed on the top of each of the front and rear ends of the lower sealing seat, and a first sealing groove is disposed on the bottom of each of the front and rear ends of the upper sealing seat at a position relative to the sealing strip.

[0007] Furthermore: the outer walls of the first mounting seat and the second mounting seat are sleeved with sealing rings, and the inner walls of the left and right ends of the upper sealing seat and the lower sealing seat are provided with second sealing grooves matching the sealing rings.

[0008] Furthermore: the return air duct connecting valve includes a first valve body, a second valve body, a valve core and a spring, one end of the first valve body is connected to the helium recovery hole through a pipeline, the other end of the first valve body is fixed to the outer wall of the second valve body, there is a gap between the inner wall of the first valve body and the outer wall of the second valve body, one end of the second valve body in the first valve body is sealed, the other end of the second valve body extends out of the first valve body and is open, the valve core is piston-connected in the second valve body and is connected to one end of the seal of the second valve body through a spring, an air guide hole is opened on the side wall of the second valve body in the first valve body, and the air guide hole is sealed by the valve core.

[0009] Furthermore: the return air duct connecting valve is connected to the return air duct through a joint, and the joint includes a third valve body, a push rod and a support plate. The return air duct is integrated with one end of the third valve body and are interconnected. The other end of the third valve body is open and an internal thread is provided on its inner wall. An external thread matching the internal thread is provided on the outer wall of one end of the second valve body extending out of the first valve body. The third valve body is detachably connected to the second valve body through the cooperation of the internal thread and the external thread. The support plate is fixed in the third valve body and has a number of through holes evenly arranged thereon. One end of the push rod is fixed on the support plate, and the other end of the push rod extends to the outside of the third valve body along the open first section of the third valve body.

[0010] After adopting the above structure, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model can collect the escaped helium by means of the lower sealing seat and the upper sealing seat, thereby completing the recovery of all the helium, thus playing a role in saving resources and reducing costs.

[0012] 2. The utility model can automatically seal the helium recovery hole when the joint is not connected through the return air pipeline connection valve, and can automatically open after the joint is connected, which plays a role in increasing practical performance.

[0013] 3. The utility model has the advantages of simple structure, easy manufacture, practicality and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 for Figure 1 A is an enlarged view of the middle image.

[0017] Figure 3 This is a top view of the lower sealing seat.

[0018] Figure 4 This is a connection diagram for the return air pipeline connecting the valve and the connector. DETAILED DESCRIPTION

[0019] like Figure 1 , Figure 2 and Figure 3The helium leak detection device for inner hole welding shown in the figure comprises a workbench 1, a top seat 2, a lower sealing seat 3, an upper sealing seat 10, a left leak detection end 5 and a right leak detection end 7, wherein the top seat 2 is located directly above the workbench 1 and is fixedly connected thereto through a column, the lower sealing seat 3 is horizontally fixed on the workbench directly below the top seat, the upper sealing seat is located directly above the lower sealing seat 3, a downward clamping electric cylinder 12 is installed on the top seat, the shaft end of the downward clamping electric cylinder passes through the top seat and is connected to the upper sealing seat, a first mounting seat 4 and a second mounting seat 6 are fixed in the left and right ends of the lower sealing seat respectively, the left leak detection end is connected to the first mounting seat through the clamping electric cylinder 8, and the leak detection The right end of the leak is fixedly arranged on the side of the second mounting seat facing the first mounting seat, and the upper sealing seat is closed on the lower sealing seat by pressing down to clamp the electric cylinder cover. After covering, the left and right ends between the upper sealing seat and the lower sealing seat are sealed respectively by the first mounting seat and the second mounting seat, and the side of the second mounting seat away from the first mounting seat is connected to a pressurized helium delivery pipeline 9, and the right end of the leak detection and the second mounting seat are both provided with air guide channels at positions relative to the pressurized helium delivery pipeline, and the left end of the leak detection is installed with an air pressure detection sensor 14 on the side facing the right end of the leak detection, and a helium recovery hole 3-1 is provided at the bottom of the lower sealing seat, and the helium recovery hole is connected to the return air pipeline connection valve 11 through a pipeline. When working, first put the inner hole welded pipe into the lower sealing seat, start the clamping electric cylinder to clamp the pipe using the left and right leak detection ends, and seal the two ends of the pipe through the left and right leak detection ends, then start the lower pressure clamping electric cylinder to cover the upper sealing seat on the lower sealing seat, at this time, pressurized helium is delivered to the pipe through the pressurized helium delivery pipeline, and the pressure change is observed through the air pressure detection sensor to determine whether there is a leak. When the air tightness is good, all the helium is pumped out through the pressurized helium delivery pipeline. When there is a problem with the inner hole welding, part of the helium will escape along the gap left by the welding. At this time, this part of the helium is collected through the cooperation of the upper sealing seat and the lower sealing seat. The utility model can collect the helium that escapes through the lower sealing seat and the upper sealing seat, thereby completing the recovery of all the helium, which plays a role in saving resources and reducing costs; the utility model has the advantages of simple structure, easy manufacturing, practicality and high efficiency.

[0020] like Figure 3 The lower sealing seat shown and the upper sealing seat are both semi-cylindrical in shape, and two arc-shaped support plates 15 are arranged on the inner wall of the lower sealing seat from left to right.

[0021] like Figure 1 , Figure 2 and Figure 3A sealing strip 13 is provided on the top of each of the front and rear ends of the lower sealing seat, and a first sealing groove is provided at the bottom of the front and rear ends of the upper sealing seat relative to the position of the sealing strip; a sealing ring is sleeved on the outer wall of the first mounting seat and the second mounting seat, and a second sealing groove matching the sealing ring is provided on the inner wall of the left and right ends of the upper sealing seat and the lower sealing seat.

[0022] like Figure 4 The return air pipeline connecting valve shown includes a first valve body 11-1, a second valve body 11-2, a valve core 11-4 and a spring 11-3, one end of the first valve body is connected to the helium recovery hole through a pipeline, the other end of the first valve body is fixed to the outer wall of the second valve body, there is a gap between the inner wall of the first valve body and the outer wall of the second valve body, one end of the second valve body in the first valve body is sealed, the other end of the second valve body extends out of the first valve body and is open, the valve core is piston-connected in the second valve body and connected to one end of the second valve body through a spring, an air guide hole 11-2-1 is opened on the side wall of the second valve body in the first valve body, and the air guide hole is sealed by the valve core; the return air pipeline The connecting valve is connected to the return air duct 17 through a joint, and the joint includes a third valve body 16-1, a push rod 16-3 and a support plate 16-2. The return air duct is integrated with one end of the third valve body and communicated with each other. The other end of the third valve body is open and an internal thread is provided on its inner wall. An external thread matching the internal thread is provided on the outer wall of one end of the second valve body extending out of the first valve body. The third valve body is detachably connected to the second valve body through the cooperation of the internal thread and the external thread. The support plate is fixed in the third valve body and has a plurality of through holes evenly arranged thereon. One end of the push rod is fixed on the support plate, and the other end of the push rod extends to the outside of the third valve body along the open first section of the third valve body.

[0023] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims

1. A helium leak detection device for inner hole welding, characterized in that: The invention comprises a workbench (1), a top seat (2), a lower sealing seat (3), an upper sealing seat (10), a left end of a leak detector (5) and a right end of a leak detector (7), wherein the top seat (2) is located directly above the workbench (1) and is fixedly connected to the workbench through a column, the lower sealing seat (3) is horizontally fixed on the workbench directly below the top seat, the upper sealing seat is located directly above the lower sealing seat (3), a downward clamping electric cylinder (12) is installed on the top seat, the shaft end of the downward clamping electric cylinder passes through the top seat and is connected to the upper sealing seat, a first mounting seat (4) and a second mounting seat (6) are respectively fixed in the left and right ends of the lower sealing seat, the left end of the leak detector is connected to the first mounting seat through a clamping electric cylinder (8), and the The right end of the leak detector is fixedly arranged on a side of the second mounting seat facing the first mounting seat, and the upper sealing seat is covered on the lower sealing seat by pressing down and clamping the electric cylinder cover. After covering, the left and right ends between the upper sealing seat and the lower sealing seat are sealed respectively through the first mounting seat and the second mounting seat, and the side of the second mounting seat away from the first mounting seat is connected to a pressurized helium delivery pipeline (9), and the right end of the leak detector and the second mounting seat are provided with air guide channels at positions relative to the pressurized helium delivery pipeline, and the left end of the leak detector is provided with an air pressure detection sensor (14) on the side facing the right end of the leak detector, and the bottom of the lower sealing seat is provided with a helium recovery hole (3-1), which is connected to a return air pipeline connection valve (11) through a pipeline.

2. A helium leak detection device for inner hole welding according to claim 1, characterized in that: The lower sealing seat and the upper sealing seat are both semi-cylindrical in shape, and two arc-shaped support plates (15) are arranged on the inner wall of the lower sealing seat from left to right.

3. A helium leak detection device for inner hole welding according to claim 1, characterized in that: A sealing strip (13) is respectively arranged at the top of the front and rear ends of the lower sealing seat, and a first sealing groove is respectively arranged at the bottom of the front and rear ends of the upper sealing seat relative to the position of the sealing strip.

4. The helium leak detection device for inner hole welding according to claim 1, characterized in that: The outer walls of the first mounting seat and the second mounting seat are sleeved with sealing rings, and the inner walls at the left and right ends of the upper sealing seat and the lower sealing seat are provided with second sealing grooves matching the sealing rings.

5. The helium leak detection device for inner hole welding according to claim 1, characterized in that: The return air duct connection valve comprises a first valve body (11-1), a second valve body (11-2), a valve core (11-4) and a spring (11-3); one end of the first valve body is connected to the helium recovery hole through a pipeline; the other end of the first valve body is fixed to the outer wall of the second valve body; a gap exists between the inner wall of the first valve body and the outer wall of the second valve body; one end of the second valve body in the first valve body is sealed; the other end of the second valve body extends out of the first valve body and is open; the valve core is piston-connected to the second valve body and is connected to one end of the second valve body through a spring; an air guide hole (11-2-1) is provided on the side wall of the second valve body in the first valve body; the air guide hole is sealed by the valve core.

6. A helium leak detection device for inner hole welding according to claim 5, characterized in that: The return air duct connecting valve is connected to the return air duct (17) through a joint, and the joint includes a third valve body (16-1), a push rod (16-3) and a support plate (16-2). The return air duct is connected to one end of the third valve body as a whole and are interconnected. The other end of the third valve body is open and an internal thread is provided on its inner wall. An external thread matching the internal thread is provided on the outer wall of one end of the second valve body extending out of the first valve body. The third valve body is detachably connected to the second valve body through the cooperation of the internal thread and the external thread. The support plate is fixed in the third valve body and has a plurality of through holes evenly arranged thereon. One end of the push rod is fixed on the support plate, and the other end of the push rod extends out of the third valve body along the first open section of the third valve body.

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