Diaphragm air tightness testing device

Abstract

The utility model relates to the technical field of air tightness detection devices, in particular to a diaphragm air tightness testing device. Comprising a lower cylinder body which is fixed on a bearing platform, is provided with an opening at the upper end, is used for constructing a closed gas chamber and is communicated with a gas pressure reading device; the upper cylinder body mechanism comprises a straight-through upper cylinder body arranged on a vertical lifting assembly, and the vertical lifting assembly drives the upper cylinder body to vertically lift; the upper barrel is used for constructing a water chamber, the vertical lifting assembly is installed on the horizontal plane moving assembly, and the horizontal plane moving assembly drives the upper barrel to move to the position over the lower barrel on the horizontal plane; and the limiting mechanism is used for limiting when the horizontal plane moving assembly drives the upper barrel body to move to the position over the lower barrel body and is matched with the upper barrel body mechanism to achieve axial alignment of the upper barrel body and the lower barrel body. According to the utility model, the diaphragm does not need to be cut, the test is non-destructive, different areas of the same sample can be tested, the tedious operation of traditional bolt fastening is avoided, the detection efficiency is high, and the practicability is strong.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing devices, and in particular to a diaphragm airtightness testing device. Background Technology

[0002] In the process of hydrogen production through water electrolysis, the airtightness of the diaphragm has a significant impact on the hydrogen production efficiency. The main function of the diaphragm is to isolate the hydrogen and oxygen produced at the cathode and anode, ensuring that they accumulate in their respective chambers and flow out of the electrolyzer through their respective channels, thereby achieving the separation of hydrogen and oxygen. A diaphragm with good airtightness can effectively prevent gas mixing and improve gas purity, so testing diaphragm samples is of great significance.

[0003] Existing diaphragm testing devices generally consist of a lower cylinder with an upper flange, a diaphragm, and an upper cylinder with a lower flange, arranged from bottom to top. The lower cylinder forms a sealed air chamber connected to a pressure instrument, while the upper cylinder forms a water chamber. The diaphragm acts as a gas-liquid interface separating the sealed air chamber and the water chamber. During testing, air is gradually introduced into the sealed air chamber, and the airtightness is determined by monitoring the pressure gauge reading (bubble point pressure) when the first bubble appears in the water chamber. In existing diaphragm testing devices, the diaphragm is placed on the lower cylinder and then bolted to the flange of the upper cylinder. The diaphragm is clamped between the lower and upper cylinders. If the diaphragm is too large, it will interfere with the bolts, requiring it to be cut to a suitable size. This is a destructive test and makes it difficult to test different areas of the same sample. Furthermore, replacing the test sample in existing diaphragm testing devices requires removing the bolts, a complex and inefficient process that cannot meet the needs of large-scale sample testing. This paper proposes a diaphragm airtightness testing device to address the problems existing in the prior art. Utility Model Content

[0004] The purpose of this invention is to provide a diaphragm airtightness testing device to solve the problem that the existing diaphragm testing devices are destructive tests, making it difficult to test different areas of the same sample, and the steps are complicated and inefficient, which makes it difficult to meet the needs of large-scale sample testing.

[0005] The technical solution of this utility model is: a diaphragm airtightness testing device, comprising:

[0006] The lower cylinder is fixed on the support platform and has an open top to form a sealed air chamber, which is connected to a gas pressure reading device.

[0007] The upper cylinder mechanism includes a straight upper cylinder mounted on a vertical lifting assembly, the vertical lifting assembly driving the upper cylinder to move vertically; the upper cylinder is used to construct a water chamber, the vertical lifting assembly is mounted on a horizontal plane moving assembly, the horizontal plane moving assembly driving the upper cylinder to move horizontally to directly above the lower cylinder;

[0008] The limiting mechanism limits the movement of the upper cylinder when the horizontal plane moving component drives the upper cylinder to move directly above the lower cylinder, and works with the upper cylinder mechanism to achieve axial alignment between the upper and lower cylinders;

[0009] The sealing element seals the joint between the lower and upper cylinders.

[0010] Preferably, the sealing element is fixed to the end face of the lower cylinder that contacts the upper cylinder, or fixed to the end face of the upper cylinder that contacts the lower cylinder;

[0011] The vertical lifting assembly drives the upper cylinder to rotate and vertically lift along the axis of the upper cylinder.

[0012] The horizontal plane moving assembly includes a fixed member fixed to the support platform and a horizontal rod hinged to the fixed member, the horizontal rod swinging freely with the fixed member as the base point;

[0013] The limiting mechanism is a stop mechanism.

[0014] Preferably, the vertical lifting assembly includes a fastening screw threadedly connected to the horizontal rod, and the upper cylinder is coaxially fixed to the lower end of the fastening screw.

[0015] The fixing component is a first upright pole arranged vertically. The top surface of the first upright pole is provided with a second internal threaded hole facing downwards. The horizontal pole is provided with a through hole with a smooth inner wall in a vertical direction corresponding to the second internal threaded hole. After the first Torx screw passes through the through hole, it is threadedly locked with the second internal bolt hole, so as to realize the hinge of the horizontal pole on the first upright pole.

[0016] Preferably, a first internal threaded hole is vertically through the horizontal rod, and the fastening screw is screwed into the first internal threaded hole.

[0017] Preferably, the stop mechanism includes a stop assembly fixed on the support platform and a locking component that can be detachably fixed to the limiting assembly after the horizontal bar is limited;

[0018] The horizontal bar has a slot, and the stop bar mechanism has a stop bar that engages with the slot.

[0019] Preferably, the stop rod assembly includes a second upright rod disposed vertically on the support platform and a second Torx screw threadedly attached to the top of the second upright rod. The locking component is the second Torx screw, and the stop rod is the screw rod of the second Torx screw.

[0020] Preferably, the lower end of the lower cylinder is closed, and two air holes are opened radially on the cylinder wall of the lower cylinder; one air hole is connected to a gas pressure reducer and a gas source in sequence through a pipe, and the other air hole is connected to a gas pressure reading device through a pipe.

[0021] Preferably, the top of the fastening screw is a handle;

[0022] The sealing element is a sealing ring, which is glued to the top surface of the lower cylinder.

[0023] Preferably, the slot is a U-shaped groove with its opening facing the screw of the second Torx screw.

[0024] Compared with the prior art, the advantages of this utility model are:

[0025] (1) A diaphragm airtightness testing device of the present invention includes: a lower cylinder, an upper cylinder mechanism, a limiting mechanism, and a sealing element for sealing the pressing joint between the lower and upper cylinders; the present invention achieves rapid axial alignment and pressing of the upper and lower cylinders by adjusting the swing of the horizontal rod, limiting the slot and the second Torx screw, fixing the second Torx screw, and tightening the fastening screw, avoiding the cumbersome operation of traditional bolt tightening, and achieving high testing efficiency; the fastening screw drives the upper cylinder to press down vertically, ensuring uniform force on the diaphragm, high clamping stability, and reducing the risk of gas leakage. The present invention does not require cutting the diaphragm, is a non-destructive test, and can test different areas of the same sample, making it highly practical.

[0026] (2) In this utility model, a sealing ring is provided at the pressing point between the lower cylinder and the upper cylinder for sealing. The sealing ring can compensate for the microscopic unevenness of the contact surface between the upper cylinder and the lower cylinder, and can prevent the gas in the sealed air chamber or the water in the water chamber from leaking from the pressing point, thus ensuring the airtightness of the test environment.

[0027] (3) In this utility model, the upper cylinder is vertically lifted and lowered by rotating the screw by holding the hand part of the screw. No external power source is required. The operation is intuitive and easy to finely adjust the pressure of the diaphragm. The threaded connection (screw and horizontal bar) forms a self-locking effect, ensuring that there is no slippage or deviation during the lifting and lowering of the upper cylinder. At the same time, it reduces additional fixing parts and the overall structure is simple and compact.

[0028] (4) In this utility model, the stop bar mechanism is used to limit the horizontal bar by directly inserting the screw into the slot. The operation is simple and does not require precise alignment. The horizontal bar can be fixed and released quickly by turning the second Torx screw. At the same time, the screw of the second Torx screw also has the function of a stop bar. Compared with the prior art, which requires a clamp to fix the horizontal bar on the stop bar after setting the stop bar, the structure of this utility model is simpler and more practical. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Figure 1 This is a schematic diagram of the structure of a diaphragm airtightness testing device described in this embodiment;

[0031] Figure 2 This is a schematic diagram of the diaphragm airtightness testing device from another perspective, as described in this embodiment.

[0032] Figure 3 for Figure 1 Front view.

[0033] The components are: 1. Upper cylinder, 2. Lower cylinder, 3. Sealing ring, 4. Support platform, 5. Fastening screw, 6. Horizontal bar, 7. First upright, 8. First Torx screw, 9. Slot, 10. Second upright, 11. Second Torx screw, 12. Air hole. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to specific embodiments:

[0035] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0036] like Figures 1-3 As shown, a diaphragm airtightness testing device includes: a lower cylinder 2, an upper cylinder mechanism, a limiting mechanism, and a sealing element for sealing the pressing joint between the lower cylinder 2 and the upper cylinder 1. The lower cylinder 2 is fixed on a support platform 4 and has an open upper end for constructing a sealed air chamber, and is connected to a gas pressure reading device; the upper cylinder mechanism includes a straight upper cylinder 1 disposed on a vertical lifting assembly. In this embodiment, the upper cylinder 1 is straight, i.e. Figure 2 As shown, the upper cylinder is hollow and open at both ends; the vertical lifting assembly drives the upper cylinder 1 to move vertically; the upper cylinder 1 is used to construct the water chamber, the vertical lifting assembly is installed on the horizontal moving assembly, the horizontal moving assembly drives the upper cylinder 1 to move horizontally to directly above the lower cylinder 2; the limiting mechanism limits the movement of the upper cylinder 1 when the horizontal moving assembly drives it to move to directly above the lower cylinder 2, and cooperates with the upper cylinder mechanism to achieve axial alignment between the upper cylinder 1 and the lower cylinder 2.

[0037] The sealing element is fixed to the end face of the lower cylinder 2 that contacts the upper cylinder 1, or fixed to the end face of the upper cylinder 1 that contacts the lower cylinder 2. The sealing element is a sealing ring 3, which is glued to the top surface of the lower cylinder 2. The sealing ring 3 can compensate for the microscopic unevenness of the contact surface between the upper cylinder 1 and the lower cylinder 2, and can prevent gas in the sealed air chamber or water in the water chamber from leaking from the pressure joint, ensuring the airtightness of the test environment. It should be noted that the sealing ring is generally required. However, it may not be necessary when the upper and lower cylinders have high precision and the diaphragm is thick. Functionally, it is sufficient to ensure that there is no water or air leakage and that the upper cylinder 1 and lower cylinder 2 are not damaged during pressurization.

[0038] The horizontal movement component includes a fixed part fixed to the support platform 4 and a horizontal rod 6 hinged to the fixed part. The horizontal rod 6 swings freely around the fixed part as a base point. The free swing of the horizontal rod 6 facilitates the placement and removal of the diaphragm when the diaphragm area is large. The vertical lifting component drives the upper cylinder 1 to rotate and vertically lift along the axis of the upper cylinder 1. The vertical lifting component includes a fastening screw 5 threadedly connected to the horizontal rod 6. The upper cylinder 1 is coaxially fixed to the lower end of the fastening screw 5. The top of the fastening screw 5 is a handle. By holding the handle of the fastening screw 5 and turning the fastening screw 5, the upper cylinder 1 is vertically lifted and lowered without the need for an external power source. The operation is intuitive and easy to fine-tune the diaphragm pressing force. The threaded connection (fastening screw 5 and horizontal rod 6) forms a self-locking effect, ensuring that the upper cylinder 1 does not slip or deviate during the lifting process. At the same time, it reduces additional fixing parts, and the overall structure is simple and compact.

[0039] The fixing component is a first upright post 7 arranged vertically. The top surface of the first upright post 7 has a second internally threaded hole facing downwards. A horizontal post 6 has a smooth-walled through hole perpendicularly through the second internally threaded hole. A first Torx screw 8 passes through the through hole and is threaded into the second internally threaded bolt hole, thus achieving the hinge connection of the horizontal post 6 to the first upright post 7. A first internally threaded hole is also perpendicularly through the horizontal post 6, and a fastening screw 5 is screwed into this hole.

[0040] The limiting mechanism is a stop mechanism. The stop mechanism includes a stop assembly fixed to the support platform 4 and a locking component that detachably fixes the horizontal bar 6, after being limited, to the limiting assembly. A slot 9 is provided on the horizontal bar 6, and a stop bar is provided on the stop mechanism to engage with the slot 9. The stop assembly includes a second vertical rod 10 vertically mounted on the support platform 4 and a second Torx screw 11 threaded onto the top of the second vertical rod 10. The locking component is the second Torx screw 11, and the stop bar is the screw rod of the second Torx screw 11. The slot 9 is a U-shaped groove with its opening facing the screw rod of the second Torx screw 11. The stop mechanism limits the horizontal bar 6 by directly inserting the screw into the slot 9. It is easy to operate and does not require precise alignment. Tightening the second Torx screw 11 can quickly fix and release the horizontal bar 6. At the same time, the screw of the second Torx screw 11 also functions as a stop. Compared with the existing technology, which requires a clamp to fix the horizontal bar 6 to the stop after setting the stop, the structure of this utility model is simpler and more practical.

[0041] The lower end of the lower cylinder 2 is closed, and two air holes 12 are radially opened on the cylinder wall of the lower cylinder 2. One air hole 12 is connected to a gas pressure reducer and a gas source through a pipe, and the other air hole 12 is connected to a gas pressure reading device through a pipe. Gas is slowly added from the gas source through the gas pressure reducer to slowly increase the gas pressure in the lower cylinder, and the pressure is read by the gas pressure reading device. Of course, in another embodiment, the formation of the sealed air chamber can also be: the lower cylinder 2 is a cylinder with an open upper end and a closed bottom. A water injection pipe with a valve is provided at the bottom end of the lower cylinder 2. Water is filled in the lower cylinder 2, and a pressure gauge is connected to the upper end of the lower cylinder 2. Water is injected into the lower cylinder 2 through the water injection pipe to increase the pressure in the sealed air chamber of the lower cylinder 2.

[0042] The working principle of the diaphragm airtightness testing device of this utility model is as follows: The diaphragm is placed on the top surface of the lower cylinder 2. The horizontal rod 6 is moved, swinging towards the lower cylinder 2 with the first vertical rod 7 as the base point, thereby driving the upper cylinder 1 to move towards the lower cylinder 2 until the slot 9 of the horizontal rod 6 engages with the screw of the second Torx screw 11 above the second vertical rod 10. The horizontal rod 6 stops moving. At this time, the upper cylinder 1 moves directly above the lower cylinder 2, and the axial directions of the upper cylinder 1 and the lower cylinder 2 are aligned. The second Torx screw 11 is tightened to fix the horizontal rod 6, and then the fastening screw 5 is tightened to move the upper cylinder 1 vertically downward until the upper cylinder 1 is tightly pressed against the diaphragm. Stop; inject water through the upper opening of the upper cylinder 1, and fill the sealed air chamber with gas through the air source. When the first bubble appears in the water chamber, record the gas pressure value in the gas pressure reading device to determine the airtightness of the diaphragm. After the determination is completed, remove the water from the upper cylinder 1; tighten the fastening screw 5 to raise the upper cylinder 1, move the diaphragm, change the placement position of the diaphragm on the lower cylinder 2, and test multiple areas of a diaphragm sample; or place the next diaphragm on the top surface of the lower cylinder 2, tighten the fastening screw 5 to move the upper cylinder 1 vertically downward until the upper cylinder 1 is tightly pressed against the diaphragm and stop. Repeat the same steps to complete the testing of multiple diaphragm samples.

[0043] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A diaphragm airtightness testing device, characterized in that, include: The lower cylinder is fixed on the support platform and has an open top to form a sealed air chamber, which is connected to a gas pressure reading device. The upper cylinder mechanism includes a straight upper cylinder mounted on a vertical lifting assembly, the vertical lifting assembly driving the upper cylinder to move vertically; the upper cylinder is used to construct a water chamber, the vertical lifting assembly is mounted on a horizontal plane moving assembly, the horizontal plane moving assembly driving the upper cylinder to move horizontally to directly above the lower cylinder; The limiting mechanism limits the movement of the upper cylinder when the horizontal plane moving component drives the upper cylinder to move directly above the lower cylinder, and works with the upper cylinder mechanism to achieve axial alignment between the upper and lower cylinders; The sealing element seals the joint between the lower and upper cylinders.

2. The diaphragm airtightness testing device according to claim 1, characterized in that: The sealing element is fixed to the end face of the lower cylinder that contacts the upper cylinder, or fixed to the end face of the upper cylinder that contacts the lower cylinder. The vertical lifting assembly drives the upper cylinder to rotate and vertically lift along the axis of the upper cylinder. The horizontal plane moving assembly includes a fixed member fixed to the support platform and a horizontal rod hinged to the fixed member, the horizontal rod swinging freely with the fixed member as the base point; The limiting mechanism is a stop mechanism.

3. The diaphragm airtightness testing device according to claim 2, characterized in that: The vertical lifting assembly includes a fastening screw that is threadedly connected to a horizontal rod, and the upper cylinder is coaxially fixed to the lower end of the fastening screw. The fixing component is a first upright pole arranged vertically. The top surface of the first upright pole is provided with a second internal threaded hole facing downwards. The horizontal pole is provided with a through hole with a smooth inner wall in a vertical direction corresponding to the second internal threaded hole. After the first Torx screw passes through the through hole, it is threadedly locked with the second internal bolt hole, so as to realize the hinge of the horizontal pole on the first upright pole.

4. The diaphragm airtightness testing device according to claim 3, characterized in that: A first internal threaded hole is vertically opened on the horizontal rod, and the fastening screw is screwed into the first internal threaded hole.

5. The diaphragm airtightness testing device according to claim 2, characterized in that: The stop mechanism includes a stop assembly fixed on the support platform and a locking component that can be detachably fixed to the limiting assembly after the horizontal bar is limited. The horizontal bar has a slot, and the stop bar mechanism has a stop bar that engages with the slot.

6. The diaphragm airtightness testing device according to claim 5, characterized in that: The stop rod assembly includes a second upright rod disposed vertically on the support platform and a second Torx screw threadedly attached to the top of the second upright rod. The locking component is the second Torx screw, and the stop rod is the screw rod of the second Torx screw.

7. The diaphragm airtightness testing device according to claim 1, characterized in that: The lower end of the lower cylinder is closed, and two air holes are opened radially on the cylinder wall of the lower cylinder; one air hole is connected to a gas pressure reducer and a gas source through a pipe, and the other air hole is connected to a gas pressure reading device through a pipe.

8. The diaphragm airtightness testing device according to claim 3, characterized in that: The top of the fastening screw is a handle; The sealing element is a sealing ring, which is glued to the top surface of the lower cylinder.

9. The diaphragm airtightness testing device according to claim 6, characterized in that: The slot is a U-shaped groove with its opening facing the screw rod of the second Torx screw.

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