Pressure maintaining testing device

Abstract

The utility model discloses a pressure maintaining testing device, a supporting piece of the pressure maintaining testing device is provided with at least two positioning grooves with groove openings facing the same direction, the supporting piece is further provided with at least two on-off controllable air supply holes, the at least two air supply holes are communicated with the corresponding positioning grooves, and air inlet holes of valves can be located in the positioning grooves and communicated with the air supply holes. And the air inlet requirement is met. The pressing assembly is connected with the supporting piece and provided with movable pressing pieces opposite to notches of the at least two positioning grooves, and the pressing pieces move relative to the supporting piece to be pressed on the at least two valves so as to rapidly clamp the valves. The air supply end of the air supply part supplies air to the air supply hole, the air enters the valve from the air supply hole, and after the pressure in the valve reaches a pressure maintaining value, the air supply hole can be closed to carry out a pressure maintaining test. According to the invention, the valve positioning time is short, at least two valves can be tested in batch, the efficiency of the pressure maintaining test on the valves can be improved, and the technical problem that the efficiency of the pressure maintaining test is not ideal enough is solved to a certain extent.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pressure retention testing devices, and particularly relates to a pressure retention testing device. BACKGROUND

[0002] Pressure retention testing is used for detecting the air tightness of products, and the air tightness performance of products such as valves can also be detected by means of pressure retention testing. When products such as valves are subjected to pressure retention testing, a pressure retention testing device needs to be used.

[0003] At present, when the pressure retention testing device tests products such as valves, the clamping and positioning effect on the valves is not good enough, and the valves are prone to move, which leads to the need for re-clamping and testing, thereby affecting the efficiency of pressure retention testing and making the efficiency of pressure retention testing not ideal. SUMMARY

[0004] The application aims to at least solve the technical problem of the inefficiency of pressure retention testing to some extent. To this end, the application provides a pressure retention testing device.

[0005] The application provides a pressure retention testing device, which comprises:

[0006] A support member is provided with at least two positioning grooves and on-off controllable gas supply holes, the grooves of the at least two positioning grooves are oriented in the same direction, and one end of the at least two gas supply holes is respectively communicated with the at least two positioning grooves;

[0007] A gas supply member is provided with a gas supply end, and the other end of the at least two gas supply holes is communicated with the gas supply end;

[0008] A pressing assembly is connected with the support member and is provided with a movable pressing member, the pressing member is opposite to the grooves of the at least two positioning grooves, and is used for moving relative to the support member to approach or move away from the positioning grooves.

[0009] In some or certain embodiments, the at least two positioning grooves are arranged at equal distances.

[0010] In some or certain embodiments, the pressing member is provided with at least two protrusions corresponding to the positioning grooves one by one, and the protrusions are provided with pressing grooves opposite to the corresponding positioning grooves.

[0011] In some or certain embodiments, the support member is further provided with an on-off controllable air release hole, one end of the air release hole is communicated with one of the gas supply holes, and the other end of the air release hole is communicated with the surface of the support member.

[0012] In some or certain embodiments, the support member is provided with at least two air release holes corresponding to the at least two gas supply holes one by one.

[0013] In some or certain embodiments, the support comprises:

[0014] The mounting portion is provided with a mounting groove and an air inlet communicating with the mounting groove.

[0015] The support portion is rotationally connected with the mounting portion and covers a slot opening of the mounting groove, the positioning groove and the air supply hole are both arranged in the support portion, the other end of the air supply hole communicates with the air inlet, and the air supply end communicates with the air supply hole through the air inlet.

[0016] The connecting portion detachably connects the mounting portion and the support portion.

[0017] In some or certain embodiments, the pressure maintaining test device further comprises at least two transition pipes and at least two control valves in the mounting groove, the at least two transition pipes correspond to the at least two air supply holes one by one, and the two ends of each transition pipe respectively communicate with the air inlet and the corresponding air supply hole, the at least two control valves are arranged in the at least two transition pipes one by one and are used for controlling the on-off of the corresponding transition pipes.

[0018] In some or certain embodiments, the support is provided with a protruding portion spaced from the positioning groove, and the pressing assembly further comprises:

[0019] The telescopic cylinder is connected with the protruding portion, and the telescopic rod is telescopically extended relative to the cylinder base to approach or move away from the positioning groove, and the pressing member is fixedly connected with one end of the telescopic cylinder.

[0020] In some or certain embodiments, the support is further provided with at least two rod portions arranged side by side and spaced from the positioning groove, the axial direction of the rod portion extends along the axial direction of the telescopic rod, and the pressing member is slidably sleeved on the at least two rod portions along the axial direction of the telescopic rod.

[0021] In some or certain embodiments, the support further comprises:

[0022] The reinforcing portion connects the rod portion and the protruding portion.

[0023] According to one or at least two embodiments of the present application, the following beneficial effects are provided:

[0024] The support of the pressure maintaining test device is provided with at least two positioning grooves with the same direction, and at least two valves can be placed in the corresponding positioning grooves to realize the rapid positioning of the at least two valves, at least two valves can be tested each time, and the pressure maintaining test efficiency of the batch valves can be improved. The support is also provided with at least two controllable gas supply holes, and the at least two gas supply holes are respectively communicated with the corresponding positioning grooves, the gas inlet hole of the valve can be located in the positioning groove and communicated with the gas supply hole, and the basic requirement of the valve gas pressure maintaining is met. The pressing assembly is connected with the support and is provided with a movable pressing part opposite to the grooves of the at least two positioning grooves, the pressing part can move relative to the support to approach the positioning groove until the pressing part is pressed on the at least two valves, the pressing part cooperates with the positioning groove to realize the rapid positioning and clamping of the valve, the time required for the valve position adjustment is reduced, and the pressure maintaining test efficiency is improved. After the valve is clamped and positioned by the pressing part and the positioning groove, the gas supply end of the gas supply part can supply gas to the gas supply hole, the gas in the gas supply hole can enter the valve, the valve can be closed after the pressure in the valve reaches a certain value, and the pressure maintaining test of the at least two valves can be performed. The valve positioning time is short, and at least two valves can be tested in batches, and the pressure maintaining test efficiency of the valve can be improved, and the technical problem that the pressure maintaining test efficiency is not ideal is solved to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 A perspective view of a pressure maintaining test device in some embodiments or certain embodiments of the present application is shown.

[0027] Figure 2 A front view of a pressure maintaining test device in some embodiments or certain embodiments of the present application is shown.

[0028] Figure 3 A side view of a pressure maintaining test device in some embodiments or certain embodiments of the present application is shown.

[0029] Figure 4 A simplified structure schematic diagram of a transition pipe in some embodiments or certain embodiments of the present application is shown.

[0030] Explanation of reference signs: 1, support piece; 11, positioning groove; 12, air supply hole; 13, air release hole; 14, mounting portion; 141, mounting groove; 142, air inlet; 15, support portion; 16, connecting portion; 17, protruding portion; 171, sliding rail; 18, rod portion; 19, reinforcing portion; 2, air supply piece; 21, air supply end; 22, air supply carrier; 3, compression assembly; 31, compression piece; 311, compression groove; 32, telescopic cylinder; 321, cylinder base; 322, telescopic rod; 4, transition pipe; 5, control valve; 6, control button. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or rotating connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that the technical solutions can be realized by those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0035] In the related art, when the pressure maintaining test device tests the valve and other products, the position of the valve and other products needs to be adjusted for a certain period of time, and each test is usually performed on a single valve or a single product, and the efficiency of the pressure maintaining test is affected, and there is a technical problem that the efficiency of the pressure maintaining test is not ideal. The embodiments of the present application provide a pressure maintaining test device which can at least solve the above technical problems to some extent.

[0036] The present application will be described below in conjunction with the drawings:

[0037] Figure 1 The present application shows an isometric view of a pressure maintaining test device in some embodiments or certain embodiments of the present application, Figure 2 The present application shows a front view of a pressure maintaining test device in some embodiments or certain embodiments of the present application, Figure 3 The present application shows a side view of a pressure maintaining test device in some embodiments or certain embodiments of the present application, with reference to Figures 1 to 3 The embodiments of the present application provide a pressure maintaining test device, which comprises:

[0038] The support 1 is provided with at least two positioning grooves 11 and on-off controllable gas supply holes 12, the grooves of the at least two positioning grooves 11 are oriented in the same direction, and the at least two gas supply holes 12 are communicated to the corresponding positioning grooves 11.

[0039] The gas supply member 2 is provided with a gas supply end 21, and the gas supply end 21 is communicated with the gas supply hole 12.

[0040] The pressing assembly 3 is connected with the support 1 and is provided with a movable pressing member 31, the pressing member 31 is opposite to the grooves of the at least two positioning grooves 11, and is used to move relative to the support 1 to approach or move away from the positioning grooves 11.

[0041] The support 1 of the pressure maintaining test device is provided with at least two positioning grooves 11 with the same direction, so that at least two valves can be placed in the corresponding positioning grooves 11, the at least two valves can be quickly positioned, at least two valves can be tested at a time, and the pressure maintaining test efficiency of the batch valves can be improved. The support 1 is also provided with at least two controllable air supply holes 12, and the at least two air supply holes 12 are communicated with the corresponding positioning grooves 11. The air inlet hole of the valve can be located in the positioning groove 11 and communicated with the air supply hole 12, so as to meet the basic requirement of the valve air inlet pressure maintaining. The pressing assembly 3 is connected with the support 1, and is provided with a movable pressing part 31 opposite to the grooves of the at least two positioning grooves 11. The pressing part 31 can move relative to the support 1 to approach the positioning groove 11 until the pressing part 31 is pressed on the at least two valves. The pressing part 31 cooperates with the positioning groove 11 to quickly position and clamp the valve, the time required for adjusting the position of the valve is reduced, and the pressure maintaining test efficiency is improved. After the valve is clamped and positioned by the pressing part 31 and the positioning groove 11, air can be supplied to the air supply hole 12 through the air supply end 21 of the air supply part 2, and the air entering the air supply hole 12 enters the valve. The valve pressure reaches a certain value, and the air supply hole 12 is closed, and the pressure maintaining test of the at least two valves is performed. The time required for positioning the valve is short, and at least two valves can be tested in batches, so that the pressure maintaining test efficiency of the valve can be improved, and the technical problem that the pressure maintaining test efficiency is not ideal is solved to a certain extent.

[0042] It should be noted that the valve is one of the products that can be tested by the pressure maintaining test device in the application. In order to facilitate understanding, the application will be described below by taking the valve as an example. Figure 1 With Figure 2 The air supply part 2 is not shown in the above description.

[0043] In some or certain embodiments, the at least two positioning grooves 11 are arranged at equal intervals. The valve is placed and quickly positioned, and the pressing part 31 can be uniformly pressed on the at least two valves.

[0044] In some or certain embodiments, three or more positioning grooves 11 can also be arranged on the support 1. The directions of the grooves of the plurality of positioning grooves 11 can be consistent, the pressing part 31 can be opposite to each positioning groove 11, and the spacing between the pressing part 31 and each positioning groove 11 is the same. The plurality of valves of the same specification can be quickly positioned and tested in batches.

[0045] In some or certain embodiments, the pressure maintaining test device can also be used to test at least two valves of the same or different specifications. When testing at least two valves of different specifications, the shape of the pressing part 31 and the spacing between the pressing part 31 and the different positioning grooves 11 can be changed.

[0046] In some or certain embodiments, the pressing member 31 is provided with at least two protrusions corresponding to the positioning grooves 11, and the protrusions are provided with pressing grooves 311 opposite to the corresponding positioning grooves 11.

[0047] The protrusions correspond to the positioning grooves 11, and the protrusions are provided with the pressing grooves 311 opposite to the corresponding positioning grooves 11. The valve is placed on the positioning grooves 11 to achieve basic positioning. When the pressing member 31 approaches the positioning grooves 11, the pressing grooves 311 can press the valve. The pressing grooves 311 cooperate with the positioning grooves 11 to achieve quick positioning of the valve, improve the clamping and positioning effect of the valve, and also help to reduce the time required for clamping and positioning of the valve, and help to improve the efficiency of the pressure test. The pressing grooves 311 are arranged on the corresponding protrusions, which can avoid the possibility of interference.

[0048] In some or certain embodiments, the pressing member 31 can be in the form of a plate or a block, and the pressing member 31 can be provided with pressing grooves 311 corresponding to the positioning grooves 11, or the pressing member 31 can be provided with a pressing surface opposite to the positioning grooves 11. The pressing grooves 311 or the pressing surface can clamp and position the valve placed in the positioning grooves 11 when the pressing member 31 approaches the positioning grooves 11.

[0049] In some or certain embodiments, one end of the gas supply hole 12 can be connected to the corresponding positioning groove 11, and the other end of at least two gas supply holes 12 can be connected to the gas supply end 21. It is convenient for connection and preparation, and the gas supply hole 12 and the gas supply end 21 can also be connected through a pipe joint or the like.

[0050] In some or certain embodiments, one end of the gas supply hole 12 can be connected to the bottom of the positioning groove 11. One end of the gas supply hole 12 is connected to the bottom of the positioning groove 11, and when the valve is placed in the positioning groove 11, the weight of the valve will also cause the valve to be pressed in the positioning groove 11. The valve is positioned at the same time, which is also helpful to improve the tightness between the valve and the gas supply hole 12.

[0051] It should be noted that the gas inlet hole of the valve can be connected to one end of the gas supply hole 12 and sealingly cooperate with the hole wall of the gas supply hole 12. Or the gas inlet hole of the valve can also be inserted into one end of the gas supply hole 12 through a gas nozzle or a gas pipe structure, and the gas nozzle or the gas pipe structure sealingly cooperates with the hole wall of the gas supply hole 12. It can realize stable gas supply and pressure test of the valve. One end of the gas supply hole 12 can also be connected to the side wall of the positioning groove 11, and the position of the gas supply hole 12 can be changed according to the size and shape of the valve to be tested.

[0052] In some or certain embodiments, the support member 1 is also provided with a controllable on-off air release hole 13, one end of the air release hole 13 is connected to one gas supply hole 12, and the other end of the air release hole 13 is connected to the surface of the support member 1.

[0053] The on-off controllable vent hole 13, located outside the air supply element 2, provides space for air to escape or enter the air supply hole 12, facilitating the convenient pressure test. Alternatively, a gas cylinder or other gas source can be used to supply air to the air supply hole 12 through the vent hole 13. The gas entering the vent hole 12 can then enter the valve. After the pressure test is complete, the gas within the valve can also flow out through the vent hole 13. When not in use, the vent hole 13 can remain closed.

[0054] In some or certain embodiments, the support member 1 is provided with at least two air relief holes 13 corresponding to the at least two air supply holes 12, so as to facilitate rapid pressure relief of at least two valves and facilitate testing of the next batch of valves after the test is completed.

[0055] In some or certain embodiments, the opening and closing of the vent hole 13 can be controlled by providing a plug at the end of the vent hole 13 that communicates with the surface of the support member 1. The plug can be rotatably connected to the support member 1. Alternatively, an on-off valve or a movable switch card can be provided at the end of the vent hole 13 that communicates with the support surface to achieve control over the opening and closing of the vent hole 13.

[0056] In some or certain embodiments, one end of the air supply hole 12 is connected to the corresponding positioning groove 11, and the other end of the air supply hole 12 can also be connected to the surface of the support member 1, and then the air supply hole 12 can be controlled by a corresponding switch valve or plug. The air supply end 21 of the air supply member 2 can be connected to at least two air supply holes 12 through a multi-way connector to complete the air supply.

[0057] In some or certain embodiments, the gas supply member 2 may include a gas cylinder or a gas supply carrier 22 filled with different gases, and the output port of the gas cylinder may be configured as the gas supply end 21 .

[0058] In some or certain embodiments, the support member 1 may be a block-shaped or integral structure, the positioning groove 11 may be provided on the surface of the support member 1 , and the air supply hole 12 may also be provided through the support member 1 .

[0059] In some or certain embodiments, the support member 1 may also include:

[0060] The mounting portion 14 defines a mounting groove 141 and an air inlet 142 communicating with the mounting groove 141 .

[0061] The support portion 15 is rotatably connected to the mounting portion 14 and covers the slot of the mounting slot 141 . The positioning slot 11 and the air supply hole 12 are both provided on the support portion 15 . The other end of the air supply hole 12 is connected to the air inlet 142 . The air supply end 21 is connected to the air supply hole 12 through the air inlet 142 .

[0062] The connecting portion 16 is detachably connected to the mounting portion 14 and the supporting portion 15 .

[0063] The mounting groove 141 can reduce the overall weight of the support member 1. The mounting groove 141 between the mounting portion 14 and the support portion 15 of the support member 1 can form a certain space for the gas supply end 21 to connect or enter, which is also convenient for improving the integration of the pressure holding test device. If the sealing between the mounting portion 14 and the support portion 15 is good, the mounting groove 141 can also serve as a transition space, so that the gas entering from the air inlet 142 can evenly enter different air supply holes 12, which is convenient for testing valves of uniform specifications. The support portion 15 rotates relative to the mounting portion 14 to open or cover the mounting groove 141. When the mounting groove 141 needs to be in a closed state, the connecting portion 16 can be used to detachably connect the mounting portion 14 and the support portion 15.

[0064] In some or certain embodiments, the mounting portion 14 may be a box-shaped structure with one side open, the support portion 15 may be plate-shaped, and the connecting portion 16 may be a buckle or fastener structure to facilitate opening or closing the mounting slot 141 .

[0065] In some or certain embodiments, the pressure maintaining test device also includes at least two transition pipes 4 and at least two control valves 5 located in the installation groove 141, the at least two transition pipes 4 correspond one-to-one to the at least two air supply holes 12, and the two ends of each transition pipe 4 are respectively connected to the air inlet 142 and the corresponding air supply hole 12, and the at least two control valves 5 are arranged one-to-one in the at least two transition pipes 4 and are used to control the on and off of the corresponding transition pipes 4.

[0066] The transition tube 4 and control valve 5 can direct gas from the gas inlet 142 to different gas supply holes 12. Communication between at least two transition tubes 4 and the gas inlet 142 can be achieved through a structure such as a multi-way connector. The control valve 5 controls the opening and closing of each corresponding transition tube 4, thereby controlling the opening and closing of different gas supply holes 12. This structure provides a high level of integration for the pressure-maintaining test device and reduces manufacturing costs. The transition tube 4 can communicate with the end of the gas supply hole 12 that is away from the positioning groove 11.

[0067] For ease of understanding, here is Figure 4 , Figure 4 A simplified structural diagram of a transition duct 4 in some embodiments or certain embodiments of the present application is shown. Figure 4 It can be seen that the connection relationship between the transition pipe 4, the control valve 5, the air inlet 142 and the air supply hole 12.

[0068] In some or certain embodiments, the support member 1 is provided with a protrusion 17 spaced apart from the positioning groove 11, and the pressing assembly 3 further includes:

[0069] The telescopic cylinder 32 and the cylinder base 321 are connected to the protruding portion 17 , and one end of the telescopic rod 322 is telescopic relative to the cylinder base 321 to move closer to or away from the positioning groove 11 . The pressing member 31 is fixedly connected to one end of the telescopic cylinder 32 .

[0070] The protruding part 17 of the support 1 can provide a mounting space for the pressing mechanism, the telescopic cylinder 32 in the pressing assembly 3 can be arranged on the protruding part 17 to form a height difference with the positioning groove 11, the telescopic rod 322 of the telescopic cylinder 32 is connected to the pressing part 31, and the movement of the telescopic rod 322 can drive the pressing part 31 to approach or move away from the positioning groove 11 to press or release the valve on the positioning groove 11.

[0071] In some or certain embodiments, the pressing mechanism can also be a ball screw mechanism arranged on the support 1, and the pressing part 31 can be a sliding nut of the ball screw mechanism, and the shape of the sliding nut can be provided with a protrusion opposite to the positioning groove 11. The pressing of the valve on the positioning groove 11 can also be achieved.

[0072] In some or certain embodiments, the support 1 is further provided with at least two rod parts 18 arranged side by side and spaced from the positioning groove 11, the axial direction of the rod part 18 extends along the axial direction of the telescopic rod 322, and the telescopic rod 322 of the telescopic cylinder 32 is slidably sleeved on the at least two rod parts 18. The rod part 18 can guide the movement of the telescopic rod 322 to make the pressing part 31 move stably, and the valve on the positioning groove 11 can be stably pressed by the pressing part 31.

[0073] In some or certain embodiments, the support 1 further comprises a reinforcing part 19 connecting the rod part 18 and the protruding part 17. The reinforcing part 19 can improve the connection stability of the protruding part 17 and the rod part 18, and indirectly improve the movement stability of the pressing part 31.

[0074] In some or certain embodiments, the protruding part 17 of the support 1 can be arranged on the support part 15 of the support 1, the protruding part 17 can be plate-shaped and protrude from the support part 15, the positioning groove 11 is arranged on the support part 15 and spaced from the protruding part 17, one end of the rod part 18 can be connected to the support part 15, and the other end can be connected to the reinforcing part 19, the reinforcing part 19 can be plate-shaped and connected to the protruding part 17 on one side. The axial direction of the telescopic rod 322 in the telescopic cylinder 32 can extend along the slot of the positioning groove 11. The structure is simple and has high integration.

[0075] In some or certain embodiments, the pressing part 31 can be further provided with a sliding groove, the protruding part 17 can be provided with a sliding rail 171 corresponding to the sliding groove, the length direction of the sliding rail 171 extends along the axial direction of the telescopic rod 322, and the sliding groove of the pressing part 31 can be sleeved on the sliding rail 171 and slide along the length direction of the sliding rail 171. The movement stability of the pressing part 31 can be further improved on the basis of the rod part 18.

[0076] In some or certain embodiments, the pressure maintaining test device can further comprise a controller (not shown in the figure) connected with the support 1, a pressure sensor (not shown in the figure) arranged on the support 1, etc., the controller can be electrically connected with the telescopic rod 322 and the pressure sensor. The automation degree of the pressure maintaining test can be improved.

[0077] In some or certain embodiments, the controller can also be integrated in the mounting groove 141, and the pressure maintaining test device can further comprise a control button 6 electrically connected with the controller, the control button 6 can be used to control the opening of the movement of the telescopic rod 322 of the telescopic cylinder 32 or the closing of the movement of the telescopic rod 322.

[0078] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or at least two embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0079] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0080] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pressure retention testing device, characterized by, The pressure maintaining testing device comprises: a support provided with at least two positioning grooves and at least two on-off controllable air supply holes, the grooves of the at least two positioning grooves are oriented to the same direction, and the air supply holes are communicated with the corresponding positioning grooves; a pressing assembly connected with the support and provided with a movable pressing member, the pressing member is opposite to the grooves of the at least two positioning grooves, and moves relative to the support to approach or move away from the positioning grooves; an air supply member provided with an air supply end, the air supply end is communicated with the air supply hole.

2. The pressure maintenance test device of claim 1, wherein, The at least two positioning grooves are arranged at equal intervals.

3. The pressure testing device of claim 1, wherein, The pressing member is provided with at least two protrusions corresponding to the positioning grooves one by one, and the protrusions are provided with pressing grooves opposite to the corresponding positioning grooves.

4. The pressure maintenance testing device according to any one of claims 1 to 3, characterized in that The support is further provided with an on-off controllable air release hole, one end of the air release hole is communicated with one of the air supply holes, and the other end of the air release hole is communicated with the surface of the support.

5. The pressure maintenance test device of claim 4, wherein, The support is provided with at least two air release holes corresponding to the at least two air supply holes one by one.

6. The pressure maintenance testing apparatus of any one of claims 1 to 3, wherein, The support comprises: a mounting portion provided with a mounting groove and an air inlet communicated with the mounting groove; a support portion rotationally connected with the mounting portion and covering the groove of the mounting groove, the positioning grooves and the air supply holes are arranged in the support portion, the other end of the air supply hole is communicated with the air inlet, and the air supply end is communicated with the air supply hole through the air inlet; a connecting portion detachably connecting the mounting portion and the support portion.

7. The pressure maintenance test device of claim 6, wherein, The pressure maintaining testing device further comprises at least two transition pipes and at least two control valves in the mounting groove, the at least two transition pipes correspond to the at least two air supply holes one by one, and the two ends of each transition pipe are respectively communicated with the air inlet and the corresponding air supply hole, the at least two control valves are arranged in the at least two transition pipes one by one and are used for controlling the on-off of the corresponding transition pipes.

8. The pressure maintenance testing apparatus of any one of claims 1 to 3, wherein, The support is provided with a protruding portion spaced from the positioning grooves, and the pressing assembly further comprises: a telescopic cylinder, a cylinder base is connected with the protruding portion, and one end of a telescopic rod is telescopically extended relative to the cylinder base to approach or move away from the positioning grooves, and the pressing member is fixedly connected with one end of the telescopic cylinder.

9. The pressure maintenance test device of claim 8, wherein, The support is further provided with at least two rod portions arranged side by side and spaced from the positioning grooves, the axial direction of the rod portions extends along the axial direction of the telescopic rod, and the pressing member is slidably sleeved on the at least two rod portions along the axial direction of the telescopic rod.

10. The pressure maintenance test device of claim 9, wherein, The support further comprises: a reinforcing portion connecting the rod portions and the protruding portion.

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