Positioning jig for gas test of cylindrical water tank

Abstract

The utility model provides a positioning jig for gas testing of a cylindrical water tank. The positioning jig comprises a positioning clamp, a plugging assembly, an annular guide rail and an upper pressing plate, an interval used for bearing and positioning the water tank is defined by all movable clamping units of the positioning clamp, each movable clamping unit comprises a clamping block and an adjusting assembly, and the adjusting assembly can drive the clamping block to move in the radial direction of the interval so as to conduct adaptive adjustment according to the radial size of the water tank. The plugging assembly comprises a lifting adjusting assembly, a first driving part and a plug used for plugging the corresponding communicating hole, the lifting adjusting assembly can correspondingly adjust the height of the plug according to the height of the communicating hole in the water tank, and the first driving part can drive the plug to plug the communicating hole; the lifting adjusting assembly is installed on the annular guide rail. The plugging assembly can move and adjust along the annular guide rail according to the position of a communicating hole in the water tank. The upper pressing plate can plug the opening of the water tank through the second driving piece so as to be matched with the plugging assembly to seal the water tank, and after sealing, the air inflation connector is connected with the air tightness detection assembly so that air tightness detection can be conducted.

Description

Technical Field

[0001] The utility model relates to the technical field of processing and testing of ventilator parts, in particular to a positioning fixture for gas testing of a columnar water tank. Background Art

[0002] In modern clinical medicine, ventilators are a common medical device whose main function is to artificially replace spontaneous breathing and ventilation. At present, ventilators have been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support therapy and emergency resuscitation, and they occupy a very important position in the field of modern medicine.

[0003] The water tank is an essential component of the ventilator. The water tank needs to be tested for air tightness after processing. For different types of cylindrical water tanks, the height, diameter, and the location of the input and output ports on the circumference are different. The existing air tightness detection method is to manually plug the various box ports on the circumference of the water tank with a plug, seal the upper end of the water tank with a gland, and then connect the air tightness detection equipment through the inflation joint on the gland to pass gas into the water tank for pressure maintenance testing. The water tank needs to be fixed before the air tightness test, but there is currently a lack of universal jigs for fixing the cylindrical water tank. It is necessary to separately configure corresponding fixing jigs for different types of cylindrical water tanks. The configuration of a large number of jigs not only leads to high production costs, but a large number of jigs also increases the difficulty of equipment management. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the utility model provides a positioning fixture for a cylindrical water tank gas test, which can be adapted to the fixation of cylindrical water tanks within a certain size range, thereby reducing the cost of purchasing the fixture and the difficulty of management.

[0005] The purpose of the utility model is to provide a positioning fixture for a cylindrical water tank gas test, comprising:

[0006] The positioning fixture is installed on the base, and includes at least three mobile clamping units evenly distributed around the circumference, and each mobile clamping unit forms a zone for supporting and positioning the water tank; the mobile clamping unit includes a clamping block and an adjustment component, and the adjustment component can drive the clamping block to move radially along the zone, and the clamping block is provided with a positioning bracket for supporting the peripheral side of the bottom of the water tank;

[0007] The plugging assembly is arranged one by one corresponding to the communication holes on the peripheral side of the water tank, and includes a lifting and adjusting assembly, a first driving member and a plug for plugging the corresponding communication hole, which are connected in sequence. The lifting and adjusting assembly can adjust the height of the plug, and the first driving member can drive the plug to move closer to or away from the communication hole;

[0008] An annular guide rail is installed on the base and is located at the outer periphery of the positioning fixture, and the lifting and lowering adjustment component is slidably installed on the base via the annular guide rail;

[0009] The upper pressure plate is driven to rise and fall by a second driving member installed on the base, and is used to close the box opening at the upper end of the water tank. An inflation joint for connecting an air tightness detection component is installed in the middle of the upper pressure plate, and the inflation joint is located on the inner side of the inner wall of the box opening of the water tank supported and positioned on the positioning fixture.

[0010] The steps for using this cylindrical water tank gas testing positioning fixture are as follows:

[0011] Set the stroke of the upper pressing plate according to the height of the water tank;

[0012] According to the radial size of the water tank, the position of each clamping block is adjusted by moving the adjusting assembly of the clamping unit so that the interval is adapted to the water tank;

[0013] Place the water tank on the positioning fixture for positioning;

[0014] According to the position of the connecting hole on the water tank, the position of the plugging component is adjusted through the annular guide rail;

[0015] According to the height of the connecting hole on the water tank, the height of the plug is correspondingly adjusted through the lifting and lowering adjustment component of the plugging component;

[0016] The second driving member drives the upper pressing plate to move downward to close the box opening at the upper end of the water tank;

[0017] The first driving member drives the plug to seal the communicating hole;

[0018] Connect the inflation joint to the air tightness detection assembly through the pipeline, and then perform air tightness detection on the water tank.

[0019] In a preferred technical solution of the present invention, the adjustment component includes a first screw rod and a radial guide rail installed on a base and arranged in parallel. The radial guide rail is arranged radially along the interval. The inner end of the first screw rod is rotatably connected to a clamping block, and the clamping block is slidably arranged on the radial guide rail. A bracket is installed on the base at the outer end of the radial guide rail. The first screw rod passes through the bracket and is threadedly matched with the bracket. By rotating the outer end of the first screw rod, the first screw can drive the clamping block to move along the radial guide rail.

[0020] In a preferred technical solution of the utility model, the lifting and adjusting assembly includes a sliding seat and a frame body, the sliding seat is slidably matched with the annular guide rail, a locking member for locking the sliding seat and the annular guide rail is installed on the sliding seat, a second screw is vertically installed on the sliding seat, a lifting nut is installed on the second screw, the lifting nut is vertically slidably matched with the frame body, and the first driving member is installed on the lifting nut.

[0021] In a preferred technical solution of the present utility model, the first driving member is a plug cylinder arranged along the radial direction of the interval.

[0022] In a preferred technical solution of the utility model, a rotating operating handle is installed on the outer end of the first screw and the top end of the second screw.

[0023] In a preferred technical solution of the utility model, a first connecting hole and a second connecting hole with a height difference are provided on the peripheral side of the water tank;

[0024] The water tank is provided with vertical ribs around its periphery, wherein one of the movable clamping units is used as a positioning unit, and a positioning vertical groove for accommodating the vertical ribs is provided on the side wall of its positioning bracket, and the other movable clamping units avoid the positions of the water tank with the vertical ribs.

[0025] In a preferred technical solution of the utility model, the second driving member is a vertical downward pressure cylinder, and the downward pressure cylinder is installed on the base via a support frame.

[0026] In a preferred technical solution of the utility model, a connecting plate is installed on the top surface of the upper pressure plate, and the end of the cylinder rod of the downward pressure cylinder is connected to the connecting plate. A vertical guide rod is arranged on the connecting plate on the outer periphery of the downward pressure cylinder. The vertical guide rod passes through the support frame, and the vertical guide rod slides with the support frame in the vertical direction.

[0027] In a preferred technical solution of the utility model, a flexible sealing layer is provided on the bottom surface of the upper pressing plate.

[0028] In a preferred technical solution of the utility model, the flexible sealing layer is a rubber layer.

[0029] The beneficial effects of the utility model are:

[0030] It can adapt to the fixation of cylindrical water tanks within a certain size range, so as to cooperate with the air-tightness detection component to stagger the water tanks for air-tightness, which is conducive to reducing the cost of purchasing fixtures and the difficulty of equipment management; specifically, the various mobile clamping units of the positioning fixture form an interval for supporting the positioning water tank, and the mobile clamping unit includes a clamping block and an adjustment component, and the adjustment component can drive the clamping block to move radially along the interval to perform adaptive adjustment according to the radial size of the water tank; the plugging component includes a lifting and adjusting component, a first driving member and a plug for plugging the corresponding connecting hole connected in sequence, the lifting and adjusting component can adjust the height of the plug according to the height of the connecting hole on the water tank, and the first driving member can drive the plug to plug the connecting hole; the lifting and adjusting component is installed on the annular guide rail, so that the plugging component can be adjusted accordingly according to the position of the connecting hole on the water tank; the upper pressure plate can be moved downward by the second driving member to block the box port at the upper end of the water tank, so as to cooperate with the plugging component to ensure the overall closure of the water tank. After closure, the air-tightness detection component can be connected to the air-tightness detection component to perform air-tightness detection on the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of a cylindrical water tank.

[0032] Figure 2 It is a schematic diagram of the structure of a positioning fixture for testing gas in a cylindrical water tank.

[0033] Figure 3 It is a schematic diagram of the positioning fixture, the plugging assembly and the annular guide rail working together to fix the cylindrical water tank.

[0034] Reference numerals:

[0035] 100, water tank; 110, tank opening; 120, first connecting hole; 130, second connecting hole; 140, vertical rib; 200, base; 300, positioning fixture; 310, radial guide rail; 320, first screw rod; 330, clamping block; 331, positioning bracket; 340, bracket; 400, annular guide rail; 500, plugging assembly; 510, sliding seat; 520, frame; 530, second screw rod; 540, lifting nut; 550, first driving member; 560, plug; 600, upper pressure plate; 610, flexible sealing layer; 700, support frame; 800, inflation joint; 900, second driving member; 910, downward pressure cylinder; 920, connecting plate; 930, vertical guide rod; 940, guide sleeve. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0037] The water tank is an essential component of the ventilator. The water tank needs to be tested for air tightness after processing. For different types of cylindrical water tanks, the height, diameter, and the location of the input and output ports on the circumference are different. The existing air tightness detection method is to manually plug the various box ports on the circumference of the water tank with a plug, seal the upper end of the water tank with a gland, and then connect the air tightness detection equipment through the inflation joint on the gland to pass gas into the water tank for pressure maintenance testing. The water tank needs to be fixed before the air tightness test, but there is currently a lack of universal jigs for fixing the cylindrical water tank. It is necessary to separately configure corresponding fixing jigs for different types of cylindrical water tanks. The configuration of a large number of jigs not only leads to high production costs, but a large number of jigs also increases the difficulty of equipment management. Example

[0038] In view of the above problems, the present embodiment provides a positioning fixture for testing the gas in a cylindrical water tank, which can be adapted to fix cylindrical water tanks within a certain size range and reduce the cost of purchasing the fixture.

[0039] like Figure 1-3 As shown, a positioning fixture for a cylindrical water tank gas test:

[0040] The positioning fixture 300 is installed on the base 200, and includes at least three mobile clamping units evenly distributed around the circumference, and each mobile clamping unit forms a section for supporting and positioning the water tank 100; the mobile clamping unit includes a clamping block 330 and an adjustment component, and the adjustment component can drive the clamping block 330 to move radially along the section, and the clamping block 330 is provided with a positioning bracket 331 for supporting the bottom circumference of the water tank 100. When in use, the adjustment component can drive the clamping block 330 to move radially along the section to adjust the adaptability according to the radial size of the water tank 100;

[0041] The plugging assembly 500 is arranged one by one corresponding to the communication holes on the peripheral side of the water tank 100, and includes a lifting and adjusting assembly, a first driving member 550 and a plug 560 for plugging the corresponding communication hole, which are connected in sequence. The lifting and adjusting assembly can adjust the height of the plug 560, and the first driving member 550 can drive the plug 560 to be close to or away from the communication hole. When in use, the lifting and adjusting assembly can adjust the height of the plug 560 according to the height of the communication hole on the water tank 100, and the first driving member 550 can drive the plug 560 to plug the communication hole.

[0042] The annular guide rail 400 is mounted on the base 200 and is located at the outer periphery of the positioning fixture 300. The lifting and lowering adjustment component is slidably mounted on the base 200 via the annular guide rail 400. Specifically, the annular guide rail 400 is coaxially arranged with the interval, and the mobile clamping unit is evenly distributed around the circumference with the axis of the annular guide rail 400 as the reference. Since the lifting and lowering adjustment component is mounted on the annular guide rail 400, the plugging component 500 can be adapted to the position of the connecting hole on the water tank 100.

[0043] The upper pressure plate 600 is driven to rise and fall by a second driving member 900 installed on the base 200, and is used to close the box opening 110 at the upper end of the water tank 100. An inflation joint 800 for connecting an air tightness detection component is installed in the middle of the upper pressure plate 600. The inflation joint 800 is located on the inner side of the inner wall of the box opening 110 of the water tank 100 supported and positioned on the positioning fixture 300. When in use, the upper pressure plate 600 can be moved downward by the second driving member 900 to block the box opening 110 at the upper end of the water tank 100, so as to cooperate with the sealing component 500 to ensure the overall closure of the water tank 100. After closure, the inflation joint 800 is connected to the air tightness detection component to perform an air tightness detection on the water tank 100.

[0044] The positioning fixture for testing the cylindrical water tank 100 can be adapted to fix the cylindrical water tank 100 within a certain size range, so as to cooperate with the air tightness detection component to perform air tightness staggering on the water tank 100, which is beneficial to reduce the cost of purchasing the fixture and the difficulty of equipment management.

[0045] The steps to use are as follows:

[0046] The stroke of the upper pressing plate 600 is set according to the height of the water tank 100;

[0047] According to the radial size of the water tank 100, the position of each clamping block 330 is adjusted by moving the adjustment assembly of the clamping unit so that the interval is adapted to the water tank 100;

[0048] Place the water tank 100 on the positioning fixture 300 for positioning;

[0049] According to the position of the communication hole on the water tank 100, the position of the blocking assembly 500 is adjusted through the annular guide rail 400;

[0050] According to the height of the connecting hole on the water tank 100, the height of the plug 560 is correspondingly adjusted by the lifting and lowering adjustment component of the plugging component 500;

[0051] The second driving member 900 drives the upper pressing plate 600 to move downward to close the tank opening 110 at the upper end of the water tank 100;

[0052] The first driving member 550 drives the plug 560 to block the communication hole;

[0053] The inflation connector 800 is connected to the air tightness detection assembly through a pipeline, and then the water tank 100 is tested for air tightness.

[0054] In this embodiment, the adjustment component includes a first screw 320 and a radial guide rail 310 installed on the base 200 and arranged in parallel. The radial guide rail 310 is arranged radially along the interval. The inner end of the first screw 320 is rotatably connected to the clamp block 330. Exemplarily, the inner end of the first screw 320 is universally hinged with the clamp block 330, or the inner end of the first screw 320 is installed on the clamp block 330 via a bearing seat. The clamp block 330 is slidably set on the radial guide rail 310. A bracket 340 is installed on the base 200 at the outer end of the radial guide rail 310. The first screw 320 penetrates the bracket 340 and is threadedly matched with it. By rotating the outer end of the first screw 320, the first screw 320 can drive the clamp block 330 to move along the radial guide rail 310.

[0055] In this embodiment, the lifting and adjusting assembly includes a sliding seat 510 and a frame 520. The sliding seat 510 is slidably matched with the annular guide rail 400. A locking member is installed on the sliding seat 510 to lock the sliding seat 510 and the annular guide rail 400. Exemplarily, the locking member is a locking nail. A second screw 530 is vertically installed on the sliding seat 510. A lifting nut 540 is installed on the second screw 530. The lifting nut 540 is vertically slidably matched with the frame 520, and the first driving member 550 is installed on the lifting nut 540.

[0056] In this embodiment, the first driving member 550 is a plug cylinder arranged along the radial direction of the interval.

[0057] In this embodiment, a rotating operating handle is installed at the outer end of the first screw rod 320 and the top end of the second screw rod 530.

[0058] In this embodiment, the water tank 100 is provided with a first communication hole 120 and a second communication hole 130 with a height difference.

[0059] The water tank 100 is provided with vertical ribs 140 around its periphery, wherein one of the movable clamping units serves as a positioning unit, and a positioning vertical groove for accommodating the vertical ribs 140 is provided on the side wall of its positioning bracket 331, and the other movable clamping units avoid the positions of the water tank 100 having the vertical ribs 140.

[0060] In this embodiment, the second driving member 900 is a vertical pressing cylinder 910 , and the pressing cylinder 910 is installed on the base 200 via a supporting frame 700 .

[0061] In this embodiment, a connecting plate 920 is installed on the top surface of the upper pressure plate 600, and the end of the cylinder rod of the downward pressure cylinder 910 is connected to the connecting plate 920. A vertical guide rod 930 is arranged on the connecting plate 920 at the periphery of the downward pressure cylinder 910. The vertical guide rod 930 passes through the support frame 700, and the vertical guide rod 930 slides with the support frame 700 in the vertical direction.

[0062] In practical applications, there are four vertical guide rods 930 , which are respectively arranged at the four corners of the connecting plate 920 , or there are two vertical guide rods 930 , which are symmetrically arranged on both sides of the downward pressure cylinder 910 .

[0063] In practical applications, in order to ensure the stability of the movement of the upper pressing plate 600 , a guide sleeve 940 or a linear bearing is sleeved on the vertical guide rod 930 , and the guide sleeve 940 or the linear bearing is installed on the support frame 700 .

[0064] In this embodiment, a flexible sealing layer 610 is provided on the bottom surface of the upper pressure plate 600, and the flexible sealing layer 610 is used to ensure the sealing after the lower pressure plate covers the upper box opening 110 of the water tank 100, so as to avoid gas overflowing from the contact surface between the box opening 110 and the upper pressure plate 600 during the air tightness test.

[0065] In this embodiment, the flexible sealing layer 610 is a rubber layer or a silicone layer, so as to achieve sealing of the contact part by utilizing elastic deformation.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0067] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning fixture for testing gas in a cylindrical water tank, characterized in that: include: The positioning fixture is installed on the base, and includes at least three mobile clamping units evenly distributed around the circumference, and each mobile clamping unit forms a zone for supporting and positioning the water tank; the mobile clamping unit includes a clamping block and an adjustment component, and the adjustment component can drive the clamping block to move radially along the zone, and the clamping block is provided with a positioning bracket for supporting the peripheral side of the bottom of the water tank; The plugging assembly is arranged one by one corresponding to the communication holes on the peripheral side of the water tank, and includes a lifting and adjusting assembly, a first driving member and a plug for plugging the corresponding communication hole, which are connected in sequence. The lifting and adjusting assembly can adjust the height of the plug, and the first driving member can drive the plug to move closer to or away from the communication hole; An annular guide rail is installed on the base and is located at the outer periphery of the positioning fixture, and the lifting and lowering adjustment component is slidably installed on the base via the annular guide rail; The upper pressure plate is driven to rise and fall by a second driving member installed on the base, and is used to close the box opening at the upper end of the water tank. An inflation joint for connecting an air tightness detection component is installed in the middle of the upper pressure plate, and the inflation joint is located on the inner side of the inner wall of the box opening of the water tank supported and positioned on the positioning fixture.

2. The positioning fixture for testing the gas in a cylindrical water tank according to claim 1, characterized in that: The adjustment assembly includes a first screw rod and a radial guide rail installed on a base and arranged in parallel. The radial guide rail is arranged radially along the interval. The inner end of the first screw rod is rotatably connected to a clamping block, and the clamping block is slidably arranged on the radial guide rail. A bracket is installed on the base at the outer end of the radial guide rail. The first screw rod penetrates the bracket and is threadedly matched with the bracket. By rotating the outer end of the first screw rod, the first screw can drive the clamping block to move along the radial guide rail.

3. The positioning fixture for testing the gas in a cylindrical water tank according to claim 2, characterized in that: The lifting and adjusting assembly includes a sliding seat and a frame body. The sliding seat is slidably matched with the annular guide rail. A locking member for locking the sliding seat and the annular guide rail is installed on the sliding seat. A second screw is vertically installed on the sliding seat. A lifting nut is installed on the second screw. The lifting nut is slidably matched with the frame body. The first driving member is installed on the lifting nut.

4. The positioning fixture for testing the gas in a cylindrical water tank according to claim 3, characterized in that: The first driving member is a plug cylinder arranged along the radial direction of the interval.

5. The positioning fixture for testing the gas in a cylindrical water tank according to claim 3, characterized in that: The outer end of the first screw and the top end of the second screw are both equipped with a rotating operating handle.

6. The positioning fixture for testing gas in a cylindrical water tank according to claim 1, characterized in that: The water tank is provided with a first communication hole and a second communication hole having a height difference on the circumference thereof; The water tank is provided with vertical ribs around its periphery, wherein one of the movable clamping units is used as a positioning unit, and a positioning vertical groove for accommodating the vertical ribs is provided on the side wall of its positioning bracket, and the other movable clamping units avoid the positions of the water tank with the vertical ribs.

7. The positioning fixture for testing the gas in a cylindrical water tank according to claim 1, characterized in that: The second driving member is a vertical downward pressure cylinder, and the downward pressure cylinder is installed on the base via a supporting frame.

8. The positioning fixture for testing the gas in a cylindrical water tank according to claim 7, characterized in that: A connecting plate is installed on the top surface of the upper pressure plate, and the end of the cylinder rod of the downward pressure cylinder is connected to the connecting plate. A vertical guide rod is arranged on the connecting plate on the outer periphery of the downward pressure cylinder. The vertical guide rod passes through the support frame, and the vertical guide rod slides with the support frame in the vertical direction.

9. The positioning fixture for testing the gas in a cylindrical water tank according to claim 1, characterized in that: The bottom surface of the upper pressing plate is provided with a flexible sealing layer.

10. The positioning fixture for testing the gas in a cylindrical water tank according to claim 9, characterized in that: The flexible sealing layer is a rubber layer.

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