Bedding fabric air permeability detection device

Abstract

The invention discloses a bedding fabric air permeability detection device, and relates to the technical field of fabric air permeability detection.The bedding fabric air permeability detection device comprises a detector and a first assembly installed on the detector, a sample clamping device is arranged on the detector, and a man-machine interaction unit fixedly connected to the detector is arranged on one side of the sample clamping device; an airflow generation unit is arranged in an inner cavity of the detector, the first assembly comprises a placement cavity fixedly connected into the airflow generation unit through a bolt, and a pipeline mounting hole is formed in the eccentric position of the bottom of the placement cavity; the control system automatically drives the electric control telescopic rod to stretch out and draw back according to fabric parameters input by the man-machine interaction unit, the outer shell drives the sliding block to slide along the U-shaped groove, then the rotary base is driven to accurately rotate by 45 degrees, and rapid switching of the eight sets of nozzles is completed. The nozzle does not need to be manually disassembled and replaced in the process, the interval time of detection of the fabrics with different air permeability is greatly shortened, the device is particularly suitable for a detection scene of batch bedding fabrics, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fabric air permeability detection, in particular to a bedding fabric air permeability detection device. BACKGROUND

[0002] The air permeability of bedding fabric is one of the core indicators for measuring its comfort performance, directly affecting the heat and moisture exchange efficiency and the body experience during the user's sleep process. With the upgrading of the home textile industry, the market has higher requirements for the accuracy, efficiency and universality of bedding fabric air permeability detection. At present, the mainstream bedding fabric air permeability detection devices in the industry are all designed based on the principle of differential pressure method, that is, by building a constant pressure difference environment, measuring the gas flow per unit area through the fabric sample per unit time, and then calculating the key parameters such as air permeability, which are widely used in quality control of home textile production enterprises, compliance certification of third-party testing institutions and other scenes.

[0003] In order to adapt to bedding fabrics with different air permeability ranges, the existing detection devices usually configure multiple groups of nozzles with different specifications, and adjust the airflow channel size by replacing the nozzles to realize wide-range detection.

[0004] However, the existing bedding fabric air permeability detection device still has many technical shortcomings in actual application, and it is difficult to fully meet the upgrading needs of the industry in detection accuracy, efficiency and universality. The specific deficiencies of the prior art are as follows, and these deficiencies are solved by the corresponding structure designed in the present application:

[0005] The installation of the nozzle relies on manual adjustment, the coaxiality deviation is large, and the detection accuracy is limited. In the prior art, the installation of the nozzle is mostly in the form of manual positioning and fixing, and the operator needs to manually align the nozzle with the detection area of the sample clamping device, and then fix it through bolts, buckles and other fasteners. This method is greatly affected by human operation experience, and it is easy to cause nozzle eccentricity, which causes uneven distribution of airflow after passing through the nozzle, and cannot act vertically and uniformly on the effective area of the fabric sample, thereby causing air permeability detection data deviation. At the same time, for nozzles of different specifications, the prior art needs to configure corresponding special fixtures to realize stable installation, which not only increases the cost of equipment accessories, but also reduces the universality of the equipment, and cannot quickly adapt to multi-range detection requirements.

[0006] The nozzle switching automation degree is low, and the detection efficiency is low. When the existing device replaces the nozzle, the operator needs to stop the machine first, manually disassemble the old nozzle and the corresponding fixed structure, install the new nozzle of the new specification, and recalibrate the position. The whole process takes a long time. For batch bedding fabric detection scenarios, frequent manual switching operations can significantly prolong the detection cycle and reduce the detection efficiency. In addition, the switching mechanism of some so-called "automatic switching" devices is complex and has a long transmission chain. Not only does it occupy a lot of equipment space, but it also has the problem of insufficient switching angle control precision, which cannot guarantee the alignment consistency of different nozzles after switching with the detection area, resulting in poor repeatability and comparability of detection data of different nozzle specifications.

[0007] Therefore, the present application provides a bedding fabric air permeability detection device to solve the above problems. SUMMARY

[0008] In view of the deficiencies of the prior art, the present application provides a bedding fabric air permeability detection device to solve the problems raised in the background art.

[0009] To achieve the above purpose, the present application provides the following technical scheme: a bedding fabric air permeability detection device, comprising: a detector and a first assembly mounted thereon, the detector is provided with a sample clamping device, one side of the sample clamping device is provided with a man-machine interaction unit fixedly connected to the detector, an airflow generating unit is arranged in the inner cavity of the detector, the airflow generating unit is located directly below the sample clamping device, and a compressed air source pipeline is fixedly connected to the bottom of the airflow generating unit; the first assembly comprises: a mounting cavity fixedly connected to the airflow generating unit by bolts, and a pipeline mounting hole is formed in the eccentric position of the bottom of the mounting cavity;

[0010] The first assembly further comprises: a rotating base rotatably connected to the center of the mounting cavity, the rotating base is in the shape of a hollow cylinder, a U-shaped groove is formed in the inner wall of the rotating base, an electric control telescopic rod is arranged in the middle of the rotating base, the electric control telescopic rod is fixedly connected to the center of the mounting cavity, an auxiliary spring is arranged on the outer circle of the electric control telescopic rod, an outer shell is sleeved on the electric control telescopic rod and the outer circle of the auxiliary spring, a sliding block is fixedly connected to the outer circle of the outer shell, the sliding block is slidably connected in the U-shaped groove, an outer ring groove is formed in the middle of the outer circle of the rotating base, and a rotating ring body is rotatably connected in the outer ring groove;

[0011] It also includes a nozzle of different specifications for realizing wide-range air permeability measurement.

[0012] As preferred, the sample clamping device is composed of an annular lower clamp with air-permeable hole plate and an upper pressing ring, the human-computer interaction unit is composed of a touch screen or a key panel + display screen, the airflow generating unit core is a high-pressure fan, matched with a pressure stabilizing valve and a throttle valve, and the compressed air source pipeline is connected with an external compressed air source device.

[0013] As preferred, the U-shaped grooves are equidistantly arranged on the inner wall of the rotating base, eight groups of the U-shaped grooves are in a communicating state, the electric control telescopic rod is connected with an external controller, the outer shell is an open-ended cylinder, the outer shell is arranged on the electric control telescopic rod and the outer ring of the auxiliary spring, the auxiliary spring is fixedly connected at both ends with the outer shell and the accommodation cavity, and eight groups of the sliding blocks are equidistantly arranged.

[0014] As preferred, the second assembly comprises a spacer fixedly connected to the outer ring of the rotating base, eight groups of the spacers are equidistantly arranged, and adjacent spacers are fixedly connected with mounting bases, the mounting base is composed of a circular ring base and arc-shaped bodies fixed to the two sides of the circular ring base, an inner pipeline is arranged in the mounting base, the transverse section of the inner pipeline is L-shaped, a sidewall hole is arranged in the middle of the sidewall of the arc-shaped body, and arc-shaped bottom grooves are symmetrically arranged on the upper surface of the circular ring base.

[0015] The third assembly for improving the tightness of the nozzle after replacement is further included.

[0016] As preferred, the second assembly further comprises a positioning assembly slidingly inserted into the sidewall hole, and an arc-shaped trigger assembly is slidingly inserted into the arc-shaped bottom groove, one end of the arc-shaped trigger assembly away from the arc-shaped bottom groove is fixedly connected with a base plate, and fastening rods are symmetrically slidingly connected to the lower surface of the base plate.

[0017] As preferred, the positioning assembly is composed of a reset spring, an insertion column and an arc-shaped clamping body, the arc-shaped clamping body is arranged in close contact with the inner surface of the arc-shaped body, the arc-shaped trigger assembly is composed of a plurality of reset springs fixedly connected to the bottom of the arc-shaped bottom groove and an arc-shaped insertion body, the base plate is an annular plate, the fastening rods are slidingly inserted into the mounting base, and the fastening rods and the arc-shaped trigger assembly are arranged in perpendicular on the same horizontal plane.

[0018] As preferred, the third component comprises a top cover fixedly connected to the top of the installation cavity, a straight slot is formed in one side of the top cover close to the installation cavity, a trigger lever is fixedly connected to the outer shell below the top cover, the trigger lever is clamped in the straight slot of the top cover, the trigger lever is vertically arranged with the outer shell, a vertical rod is fixedly connected to one end of the trigger lever away from the outer shell, the vertical rod is vertically arranged with the trigger lever, a reverse L-shaped positioning body is fixedly connected to one side of the top cover close to the trigger lever, a limiting slot is formed in the middle of the upper surface of the reverse L-shaped positioning body, the limiting slot is horizontally arranged on the same vertical line with the trigger lever, and limiting columns are fixedly connected to both sides of one end of the reverse L-shaped positioning body away from the top cover.

[0019] As preferred, the third component further comprises L-shaped bodies arranged on both sides of one end of the reverse L-shaped positioning body away from the top cover, a sliding slot is formed in the L-shaped body, the limiting column is slidingly connected in the sliding slot, one end of the vertical rod away from the trigger lever is fixedly connected with the L-shaped body, and a connecting rod group is fixedly connected to one end of the L-shaped body away from the limiting column, the connecting rod group is composed of a symmetric rod and a pushing block.

[0020] The L-shaped body is L-shaped in the transverse section, the reverse L-shaped positioning body is symmetrically arranged with two groups with the installation base axis as the center, and the symmetric surfaces of the reverse L-shaped positioning body are arc-shaped and fit the outer arc surface of the nozzle.

[0021] As preferred, the third component further comprises a convex shell fixedly connected to the outer circle of the rotating ring body, the convex shell is directly below the reverse L-shaped positioning body, the convex shell is convex in the transverse section, the connecting rod group is slidingly connected in the convex shell, a reset component is fixedly connected to the upper surface of one end of the connecting rod group away from the L-shaped body, one end of the reset component away from the connecting rod group is fixedly connected with the top of the convex shell, and the reset component is composed of a spring and an air pressure rod.

[0022] Compared with the prior art, the bed linen air permeability detection device has the following beneficial effects:

[0023] After the nozzle is placed on the base plate, the base plate and the arc-shaped trigger component are driven to move downward by the self-gravity, and the gas in the arc-shaped bottom groove is compressed; the gas is transmitted to the side wall hole through the L-shaped inner pipeline, the arc-shaped clamping body of the positioning component is driven to move to the center of the base plate, and the nozzle is automatically calibrated to the coaxial position; the structure does not need manual adjustment, solves the problem of coaxiality deviation of the manually installed nozzle, ensures the alignment of the detection area of the nozzle and the sample clamping device, avoids the uneven airflow distribution caused by the eccentric nozzle, and improves the accuracy of the fabric detection data.

[0024] The clamping power of the positioning assembly is derived from the nozzle gravity, different weights and specifications of the nozzle can produce different downward pressure, and then form different gas pressure to drive the positioning assembly to clamp. This design does not need to additionally configure different specifications of the clamp, can be compatible with the stable installation of multi-range nozzles, expands the detection range of the device on different air permeability bed fabric, and improves the versatility and compatibility of the equipment.

[0025] The arc-shaped clamping body of the positioning assembly is attached to the outer wall of the nozzle, and the clamping force is continuously provided by the gas pressure. Even if it is impacted by airflow during the detection process, the nozzle will not be displaced or loosened. This structure eliminates the problem of airflow leakage caused by nozzle deviation, ensures that all test airflow passes through the effective area of the fabric, and reduces the detection error.

[0026] The control system automatically drives the electric telescopic rod to extend or retract according to the fabric parameters input by the human-computer interaction unit, drives the slider to slide along the U-shaped groove through the outer shell, and then drives the rotating base to accurately rotate by forty-five degrees, completing the rapid switching of the eight nozzles. This process does not require manual disassembly and replacement of the nozzle, greatly shortens the interval time of different air permeability fabric detection, especially suitable for batch bed fabric detection scenarios, and improves the detection efficiency.

[0027] The eight U-shaped grooves are equally distributed along the inner wall of the rotating base, and the slider is guided by the U-shaped groove, which can ensure that the rotating angle of the rotating base is accurately controlled at forty-five degrees each time, and the target nozzle and the sample clamping device detection area are accurately aligned. Compared with the traditional manual switching of the nozzle, this structure avoids the random error of manual alignment, ensures the airflow path consistency when different specifications of nozzles are detected, and improves the repeatability and comparability of the detection data.

[0028] The nozzle switching mechanism is integrated in the installation cavity, and the linear motion of the electric telescopic rod is converted into the rotary motion of the rotating base. The structure is compact and the transmission chain is short, without occupying additional external space of the equipment. At the same time, the eight nozzles are arranged in a ring shape around the outer circle of the rotating base, which greatly reduces the storage space of the multi-specification nozzles and optimizes the overall layout of the equipment.

[0029] During the nozzle switching stage, the electric telescopic rod is retracted to drive the trigger rod to move downward, and the V-shaped body is removed from the resistance of the fastening rod; after the nozzle switching is completed, the electric telescopic rod is extended, the reset spring of the reset assembly is restored, the V-shaped body is reset, the fastening rod is pushed to move the nozzle upward, and the gap between the nozzle and the top cover is further reduced, avoiding the detection data being too large caused by airflow leakage, and improving the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0031] Figure 2 It is a structure diagram of the detector of the present application;

[0032] Figure 3 is a partial sectional view of the present application;

[0033] Figure 4 is an exploded view of the first assembly of the present application;

[0034] Figure 5 is a sectional view of the second assembly of the present application;

[0035] Figure 6 is an exploded view of the second assembly of the present application;

[0036] Figure 7 is a partial view of the present application;

[0037] Figure 8 is a view of the first assembly and the third assembly of the present application;

[0038] Figure 9 is an enlarged view of A in the present application; Figure 8

[0039] Figure 10 is an enlarged view of B in the present application. Figure 8 In the drawings:

[0040]

[0041] 11, detector; 12, sample clamping device; 13, human-computer interaction unit; 14, air flow generating unit; 15, compressed air source pipeline;

[0042] 21, accommodating cavity; 22, pipeline mounting hole; 23, rotating base; 24, U-shaped groove; 25, electric control telescopic rod; 26, auxiliary spring; 27, outer shell; 28, sliding block; 29, outer ring groove; 210, rotating ring body;

[0043] 31, spacer; 32, mounting base; 33, inner pipeline; 34, side wall hole; 35, positioning assembly; 36, arc-shaped bottom groove; 37, arc-shaped triggering assembly; 38, base plate; 39, fastening rod;

[0044] 41, top cover; 42, triggering rod; 43, inverted L-shaped positioning body; 44, limiting groove; 45, limiting column; 46, L-shaped body; 47, sliding groove; 48, vertical rod; 49, connecting rod set; 410, convex shell; 411, reset assembly. DETAILED DESCRIPTION

[0045] ​​With reference to the drawings and embodiments, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. 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 the present application.

[0046] The present application will be further described in detail below according to the drawings and embodiments.

[0047] Embodiments

[0048] Please refer to Figures 1 to 6 as shown:

[0049] To solve the problems mentioned in the technical solutions, the present application provides a bedding fabric air permeability detection device, which comprises a detector 11 and a first assembly installed thereon. The detector 11 is provided with a sample clamping device 12 for flat and sealed fixation of the fabric sample, avoiding wrinkles and air flow short circuit. The diameter of the clamp can be replaced. One side of the sample clamping device 12 is provided with a human-computer interaction unit 13 fixedly connected to the detector 11, which is used for setting detection parameters, starting and stopping detection, displaying and storing detection results. The inner cavity of the detector 11 is provided with an air flow generating unit 14, which is located directly below the sample clamping device 12. The fan is used to provide stable air flow, the pressure stabilizing valve is used to maintain stable air flow pressure, and the throttle valve is used to coarsely adjust the air flow. A compressed air source pipeline 15 is fixedly connected to the bottom of the air flow generating unit 14 for providing stable and clean test gas. The first assembly comprises a placement cavity 21 fixedly connected to the air flow generating unit 14 by bolts. A pipeline mounting hole 22 is formed in the eccentric position of the bottom of the placement cavity 21, which is used to connect the compressed air source pipeline 15 and the air flow generating unit 14.

[0050] The first assembly further comprises a rotating base 23 rotatably connected to the center of the placement cavity 21. The rotating base 23 is in the form of a hollow cylinder. A U-shaped groove 24 is formed in the inner wall of the rotating base 23. An electric control telescopic rod 25 is arranged in the middle of the rotating base 23 and is fixedly connected to the center of the placement cavity 21. An auxiliary spring 26 is arranged on the outer circle of the electric control telescopic rod 25. An outer shell 27 is sleeved on the electric control telescopic rod 25 and the auxiliary spring 26. A sliding block 28 is fixedly connected to the outer circle of the outer shell 27 and is slidably connected to the U-shaped groove 24. An outer ring groove 29 is formed in the middle of the outer circle of the rotating base 23. A rotating ring body 210 is rotatably connected in the outer ring groove 29.

[0051] It also includes nozzles of different specifications for realizing wide-range air permeability accurate measurement.

[0052] The sample clamping device 12 is composed of an annular lower clamp with a gas-permeable hole plate and an upper pressing ring, the human-computer interaction unit 13 is composed of a touch screen or a key panel + display screen, the air flow generating unit 14 is composed of a high-pressure fan, a pressure stabilizing valve and a throttle valve, and the compressed air source pipeline 15 is connected with an external compressed air source device,

[0053] Eight groups of U-shaped grooves 24 are equidistantly arranged around the inner wall of the rotating base 23, the eight groups of U-shaped grooves 24 are in a communication state, the electric control telescopic rod 25 is connected with an external controller, the electric control telescopic rod 25 is used for controlling the up-down movement of the outer shell 27, and synchronously drives the slider 28 to move, and when the up-down position of the slider 28 changes, the slider 28 slidingly connected in the U-shaped groove 24 drives the rotating base 23 to rotate by forty-five degrees through the U-shaped groove 24, so as to change the position of the nozzle below the sample clamping device 12 and in communication with the air flow generating unit 14, the outer shell 27 is a cylindrical body with one end open, the outer shell 27 is arranged on the outer circle of the electric control telescopic rod 25 and the auxiliary spring 26, the auxiliary spring 26 is fixedly connected at both ends with the outer shell 27 and the accommodation cavity 21, and the slider 28 is equidistantly provided with eight groups of U-shaped grooves 24.

[0054] The second assembly includes a spacer 31 fixedly connected to the outer circle of the rotating base 23, the spacer 31 is equidistantly provided with eight groups, and adjacent spacers 31 are fixedly connected with mounting bases 32, the mounting bases 32 are provided with through holes in the middle, for the gas flow of the air flow generating unit 14, the mounting base 32 is composed of a circular ring base and arc-shaped bodies fixed on both sides of the circular ring base, the mounting base 32 is internally provided with an inner pipeline 33, the transverse section of the inner pipeline 33 is L-shaped, the sidewall of the arc-shaped body is provided with a sidewall hole 34 in the middle, and the upper surface of the circular ring base is symmetrically provided with an arc-shaped bottom groove 36 on both sides, the inner pipeline 33, the sidewall hole 34 and the arc-shaped bottom groove 36 are in a communication state.

[0055] It also includes a third assembly for improving the tightness of the nozzle after replacement.

[0056] The second assembly further includes a positioning assembly 35 slidingly inserted into the sidewall hole 34, and the arc-shaped trigger assembly 37 is slidingly inserted into the arc-shaped bottom groove 36, one end of the arc-shaped trigger assembly 37 away from the arc-shaped bottom groove 36 is fixedly connected with a base plate 38, the base plate 38 is used for placing nozzles of different specifications, and under the weight of the nozzle itself, the base plate 38 and the arc-shaped trigger assembly 37 are pushed to move into the arc-shaped bottom groove 36, the spring in the arc-shaped trigger assembly 37 is compressed, and the communicated gas in the arc-shaped bottom groove 36 and the inner pipeline 33 is compressed, the gas is transmitted to the sidewall hole 34, the sidewall hole 34 is pushed to move to the center of the base plate 38, and the cylindrical nozzle placed on the base plate 38 is clamped, so that the nozzle and the base plate 38 are on the same concentric circle, the lower surface of the base plate 38 is symmetrically slidingly connected with a fastening rod 39, the fastening rod 39 moves downward under the action of its own gravity, and the upper surface of the fastening rod 39 is on the same plane as the base plate 38.

[0057] The positioning assembly 35 is composed of a reset spring, a plug-in post and an arc-shaped clamping body which is arranged in close contact with the inner surface of the arc-shaped body. The arc-shaped triggering assembly 37 is composed of a plurality of reset springs fixedly connected to the bottom of the arc-shaped bottom groove 36 and an arc-shaped plug-in body. The base plate 38 is an annular plate. The fastening rod 39 is slidingly plugged into the mounting base 32. The fastening rod 39 is arranged perpendicularly to the arc-shaped triggering assembly 37 on the same horizontal plane

[0058] Further embodiments are shown in the drawings Figures 7 to 10

[0059] The third assembly includes a top cover 41 fixedly connected to the top of the installation cavity 21 by a bolt. A straight groove is formed in the side of the top cover 41 close to the installation cavity 21. A triggering rod 42 is fixedly connected to the outer shell 27 below the top cover 41. The outer shell 27 moves vertically downward during the contraction of the electrically controlled telescopic rod 25, synchronously driving the triggering rod 42 fixedly connected to the outer shell 27 to move vertically downward and be clamped into the limiting groove 44. The triggering rod 42 moves downward to push the vertical rod 48 connected perpendicularly thereto to move downward. The vertical rod 48 pushes the L-shaped body 46 to move downward, thereby causing the sliding groove 47 to slide outside the limiting post 45. Under the limiting cooperation of the sliding groove 47 and the limiting post 45, the L-shaped body 46 moves downward and, through the cooperation of the connecting rod set 49 and the convex shell 410, the reset assembly 411, etc., causes the connecting rod set 49 to move vertically downward in the convex shell 410. The reset assembly 411 is stretched. The L-shaped body 46 releases the interference with the fastening rod 39. When the electrically controlled telescopic rod 25 extends to push the outer shell 27 to move upward, the L-shaped body 46 and other assemblies reset, and, under the restoring force of the reset assembly 411, indirectly pull the L-shaped body 46 upward through the connecting rod set 49, interfere with the fastening rod 39 in the next mounting base 32, push the fastening rod 39 to move upward, and place the nozzle on the base plate 38 in close contact with the upper side, thereby improving the tightness during the detection of the nozzle. The triggering rod 42 is clamped into the straight groove on the top cover 41. The triggering rod 42 is arranged perpendicularly to the outer shell 27. The triggering rod 42 is fixedly connected at the end away from the outer shell 27 to the vertical rod 48 which is arranged perpendicularly to the triggering rod 42. The top cover 41 is fixedly connected at the side close to the triggering rod 42 to the inverted L-shaped positioning body 43. The limiting groove 44 is formed in the middle of the upper surface of the inverted L-shaped positioning body 43. The limiting groove 44 is arranged horizontally on the same vertical line as the triggering rod 42. The limiting post 45 is fixedly connected to the two sides of the end of the inverted L-shaped positioning body 43 away from the top cover 41.

[0060] ​The third assembly further comprises L-shaped bodies 46 arranged on both sides of the end of the inverted L-shaped positioning body 43 away from the top cover 41, a sliding groove 47 is formed in the L-shaped body 46, the limiting column 45 is slidingly connected in the sliding groove 47, a vertical rod 48 is fixedly connected to the L-shaped body 46 at an end away from the trigger rod 42, an end of the L-shaped body 46 away from the limiting column 45 is fixedly connected with a connecting rod set 49, and the connecting rod set 49 is composed of symmetrical rods and pushing blocks.

[0061] The L-shaped body 46 has an L-shaped transverse section, and the inverted L-shaped positioning body 43 is symmetrically arranged with two groups with the axis of the mounting base 32 as the center, and the symmetric surfaces of the inverted L-shaped positioning body 43 are both arc-shaped and fit the outer arc surface of the nozzle.

[0062] The third assembly further comprises a convex shell 410 fixedly connected to the outer ring of the rotating ring body 210, the convex shell 410 is directly below the inverted L-shaped positioning body 43, the convex shell 410 has a convex transverse section, the connecting rod set 49 is slidingly connected in the convex shell 410, a reset assembly 411 is fixedly connected to the upper surface of an end of the connecting rod set 49 away from the L-shaped body 46, an end of the reset assembly 411 away from the connecting rod set 49 is fixedly connected to the top of the convex shell 410, and the reset assembly 411 is composed of a spring and an air pressure rod.

[0063] The working principle of all the contents in the above embodiments is as follows:

[0064] In use, an operator inputs the type of the bed product fabric to be detected, the target test pressure difference, the test area and other parameters through the touch screen / keypad+display screen of the man-machine interaction unit 13 installed on the detector 11; at the same time, an external compressed air source connected by the compressed air source pipeline 15 and a high-pressure fan in the airflow generating unit 14 are started, and after the airflow is stabilized and throttled by the pressure stabilizing valve and the throttle valve of the airflow generating unit 14, a stable airflow is formed for standby;

[0065] According to the size of the bed product fabric to be detected, a sample clamping device 12 of an appropriate specification is selected, the fabric sample is laid flat on the air-permeable hole plate of the annular lower clamp, the upper compression ring is compressed, the fabric is fixed flat through the sealing structure of the clamp, wrinkles and airflow short circuit are avoided, and it is ensured that the test airflow only passes through the effective area of the fabric.

[0066] The nozzle installation process is specifically referred to Figure 5 、 Figure 6 :

[0067] Different air permeability range corresponding nozzle placed on the substrate 38, the nozzle itself weight push the substrate 38 to the arc bottom groove 36 direction moves, synchronous drive arc trigger assembly 37 compression its inside reset spring; Arc bottom groove 36 and inner pipeline 33 communication, arc trigger assembly 37 moves when compression inner pipeline 33 inside gas, gas through the side wall hole 34 push positioning assembly 35 to the center of the substrate 38 direction moves, automatic centering clamping of cylindrical nozzle, ensure that the nozzle and substrate 38 is coaxial position, complete the preloading of multiple groups of different specifications nozzle.

[0068] When the nozzle is automatically switched, with reference to Figure 4 :

[0069] The control system outputs a driving signal to the electric control telescopic rod 25 arranged at the center of the cavity 21 according to the fabric parameters input by the human-computer interaction unit 13, and the electric control telescopic rod 25 performs a contraction action;

[0070] When the electric control telescopic rod 25 contracts, the outer shell 27 sleeved on the outer circle thereof moves vertically downward; Eight groups of sliders 28 fixed equidistantly on the outer circle of the outer shell 27 move downward synchronously, the sliders 28 are slidingly connected in the U-shaped grooves 24 on the inner wall of the rotating base 23, and under the guidance of the U-shaped grooves 24, when the outer shell 27 moves downward, the sliders 28 slide to the bottom of the U-shaped grooves 24, at this time, the rotating base 23 rotates by one-sixteenth of a circle, and when the outer shell 27 rises, under the guidance and limitation of the U-shaped grooves 24 on the outer shell 27, the rotating base 23 continues to rotate by one-sixteenth of a circle, so that the hollow cylindrical rotating base 23 is driven to rotate by forty-five degrees around its axis during the lifting of the outer shell 27, and the replacement work of the mounting base 32 is completed;

[0071] Among them: eight groups of U-shaped grooves 24 correspond to eight groups of nozzles, and one group of nozzles is switched every forty-five degrees of rotation.

[0072] Among them: eight groups of interval bodies 31 are fixed equidistantly on the outer circle of the rotating base 23, the mounting bases 32 are connected between adjacent interval bodies 31, and the nozzles are pre-installed on the substrates 38 of the mounting bases 32; When the rotating base 23 rotates, the mounting bases 32 are driven to rotate synchronously until the target nozzle moves to the third assembly and the lower side of the sample clamping device 12, and the accurate alignment of the nozzle and the sample detection area is completed.

[0073] Further, when the outer shell 27 moves downward, the trigger rod 42 fixed on the top thereof moves vertically downward synchronously, the trigger rod 42 is clamped into the straight groove of the top cover 41 and drives the vertical rod 48 connected vertically thereto to move downward; The vertical rod 48 drives the L-shaped body 46 to move downward along the limiting column 45; Among them: the sliding groove 47 of the L-shaped body 46 is slidingly matched with the limiting column 45;

[0074] When the L-shaped body 46 moves downward, the connecting rod set 49 is pulled to slide downward in the convex shell 410, the reset assembly 411 is stretched to store elastic potential energy, the L-shaped body 46 is removed from the interference with the fastening rod 39, the nozzle on the base plate 38 moves downward, the base 32 is conveniently rotated to move and the next group of nozzles is replaced;

[0075] When the next group of second assemblies rotates and moves by forty-five degrees, the outer shell 27 moves upward to move the trigger rod 42 and the vertical rod 48 upward, the nozzle outer ring is clamped into the symmetrical arc surfaces of the two groups of inverted L-shaped positioning bodies 43, so as to ensure that the nozzle is in the central position and to limit the position of the nozzle in the detection process, when the L-shaped body 46 and other assemblies move upward with the vertical rod 48, the end of the L-shaped body 46 away from the sliding groove 47 moves upward to interfere with the fastening rod 39, when the fastening rod 39 is interfered, the fastening rod 39 pushes the nozzle placed on the base plate 38 to move upward, the fit between the nozzle and the lower surface of the top cover 41 is improved, and the reliability of the detection result is ensured.

[0076] After the nozzle is placed on the base plate 38, the base plate 38 and the arc-shaped trigger assembly 37 are pushed downward by the gravity of the nozzle to compress the gas in the arc-shaped bottom groove 36; the gas is transmitted to the side wall hole 34 through the L-shaped inner pipeline 33 to drive the arc-shaped clamping body of the positioning assembly 35 to move to the center of the base plate 38 to automatically align the nozzle to the coaxial position; the structure does not need manual adjustment, solves the problem of deviation of the coaxiality of the manually installed nozzle, ensures the alignment of the nozzle and the detection area of the sample clamping device 12, avoids the uneven distribution of airflow caused by the eccentric nozzle, and improves the accuracy of the detection data.

[0077] The clamping power of the positioning assembly 35 is derived from the gravity of the nozzle, nozzles of different weights and specifications can produce different downward pressures, and then different gas pressures are formed to drive the positioning assembly 35 to clamp. The design does not need to additionally configure clamps of different specifications, can be compatible with stable installation of multi-range nozzles, expands the detection range of the device on different air permeability bed fabrics, and improves the universality and compatibility of the equipment.

[0078] The arc-shaped clamping body of the positioning assembly 35 is in contact with the outer wall of the nozzle, and the clamping force is continuously provided by the gas pressure, so that the nozzle will not displace or loosen even if it is impacted by airflow during the detection process. The structure eliminates the problem of airflow leakage caused by the displacement of the nozzle, ensures that all test airflows pass through the effective area of the fabric, and reduces the detection error.

[0079] The control system automatically drives the electric control telescopic rod 25 to extend or retract according to the fabric parameters input by the human-computer interaction unit 13, drives the sliding block 28 to slide along the U-shaped groove 24 through the outer shell 27, and then drives the rotating base 23 to rotate accurately by forty-five degrees, thereby completing the rapid switching of the eight groups of nozzles. This process does not require manual disassembly and replacement of the nozzles, greatly shortens the interval time of detection of different air permeability fabrics, is especially suitable for the detection scene of batch bed linen fabrics, and improves the detection efficiency.

[0080] The eight groups of U-shaped grooves 24 are distributed equidistantly along the inner wall of the rotating base 23, and the sliding block 28 is guided by the U-shaped groove 24, which can ensure that the rotating angle of the rotating base 23 is accurately controlled at forty-five degrees each time, and the target nozzle and the detection area of the sample clamping device 12 are accurately aligned. Compared with the traditional manual switching mode of the nozzle, this structure avoids the random error of manual alignment, ensures the airflow path consistency during detection of nozzles of different specifications, and improves the repeatability and comparability of the detection data.

[0081] The nozzle switching mechanism is integrated in the placement cavity 21, and the linear motion of the electric control telescopic rod 25 is converted into the rotary motion of the rotating base 23, so that the structure is compact and the transmission chain is short, without occupying additional external space of the equipment. At the same time, the eight groups of nozzles are arranged in a ring shape at the outer circle of the rotating base 23, which greatly reduces the storage space of the multi-specification nozzles and optimizes the overall layout of the equipment.

[0082] During the nozzle switching stage, the electric control telescopic rod 25 is retracted to drive the trigger rod 42 to move downward, thereby removing the interference of the V-shaped body 46 with the fastening rod 39; after the nozzle switching is completed, the electric control telescopic rod 25 is extended, the spring restoring force of the reset component 411 pulls the V-shaped body 46 to reset, the interference of the fastening rod 39 is removed, the nozzle is pushed upward, the gap between the nozzle and the top cover 41 is further reduced, the detection data is prevented from being too large due to air leakage, and the detection accuracy is improved.

[0083] The above working process please refer to Figures 1 to 10 .

[0084] It should be noted that, in this article, relational terms such as first and second are used only to distinguish one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or equipment including the element.

[0085] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since various modifications can be made by those skilled in the art, without departing from the spirit and scope of the application, which are defined by the appended claims and their equivalents.

Claims

1. A device for testing the breathability of bedding fabrics, comprising: The detector (11) and the first component mounted thereon are characterized in that: the first component includes: a placement cavity (21) fixedly connected to the airflow generating unit (14) by bolts, wherein a pipeline installation hole (22) is provided at the bottom eccentric of the placement cavity (21); The first component also includes: a rotating base (23) rotatably connected to the center of the placement cavity (21), the rotating base (23) being hollow cylindrical, the inner wall of the rotating base (23) having a U-shaped groove (24), an electrically controlled telescopic rod (25) being provided in the middle of the rotating base (23), the electrically controlled telescopic rod (25) being fixedly connected to the center of the placement cavity (21), an auxiliary spring (26) being provided on the outer ring of the electrically controlled telescopic rod (25), an outer shell (27) being fitted around the outer ring of the electrically controlled telescopic rod (25) and the auxiliary spring (26), a slider (28) being fixedly connected on the outer ring of the outer shell (27), the slider (28) being slidably connected in the U-shaped groove (24), an outer ring groove (29) being provided in the middle of the outer ring of the rotating base (23), and a rotating ring (210) being rotatably connected in the outer ring groove (29). It also includes nozzles of different sizes for accurate measurement of a wide range of air permeability.

2. The bedding fabric breathability testing device according to claim 1, characterized in that: The detector (11) is provided with a sample clamping device (12). A human-machine interaction unit (13) is fixedly connected to the detector (11) on one side of the sample clamping device (12). An airflow generating unit (14) is provided in the inner cavity of the detector (11). The airflow generating unit (14) is located directly below the sample clamping device (12). A compressed air source pipeline (15) is fixedly connected to the bottom of the airflow generating unit (14). The sample clamping device (12) consists of an annular lower clamp with a perforated plate and an upper pressure ring. The human-machine interaction unit (13) consists of a touch screen or a button panel + display screen. The core of the airflow generating unit (14) is a high-pressure blower, equipped with a pressure stabilizing valve and a throttle valve. The compressed air source pipeline (15) is connected to an external compressed air source device.

3. The bedding fabric breathability testing device according to claim 1, characterized in that: The U-shaped groove (24) is provided in eight sets at equal intervals around the inner wall of the rotating base (23). All eight sets of the U-shaped groove (24) are in a connected state. The electric telescopic rod (25) is connected to an external controller. The outer shell (27) is a cylinder with one end open. The outer shell (27) covers the outer ring of the electric telescopic rod (25) and the auxiliary spring (26). The two ends of the auxiliary spring (26) are fixedly connected to the outer shell (27) and the mounting cavity (21) respectively. The slider (28) is provided in eight sets at equal intervals around the base.

4. The bedding fabric breathability testing device according to claim 1, characterized in that: It also includes a second component, which includes a spacer (31) fixedly connected to the outer ring of the rotating base (23). The spacer (31) is arranged in eight sets at equal intervals, and each adjacent spacer (31) is fixedly connected to a mounting base (32). The mounting base (32) has a through hole in the middle. The mounting base (32) is composed of a circular base and an arc-shaped body fixed on both sides of the circular base. An inner pipe (33) is opened inside the mounting base (32). The cross-section of the inner pipe (33) is L-shaped. A side wall hole (34) is opened in the middle of the side wall of the arc-shaped body. An arc-shaped bottom groove (36) is symmetrically opened on both sides of the upper surface of the circular base. The inner pipe (33), the side wall hole (34), and the arc-shaped bottom groove (36) are all in a connected state. It also includes a third component to improve its tightness after nozzle replacement.

5. The bedding fabric breathability testing device according to claim 4, characterized in that: The second component also includes a positioning component (35) that is slidably inserted into the side wall hole (34), an arc-shaped trigger component (37) that is slidably inserted into the arc-shaped bottom groove (36), a base plate (38) that is fixedly connected to one end of the arc-shaped trigger component (37) away from the arc-shaped bottom groove (36), and fastening rods (39) that are symmetrically slidably connected to both sides of the lower surface of the base plate (38).

6. The bedding fabric breathability testing device according to claim 5, characterized in that: The positioning component (35) consists of a reset spring, a plug-in post, and an arc-shaped clamping body. The arc-shaped clamping body is fitted to the inner surface of the arc-shaped body. The arc-shaped trigger component (37) consists of multiple reset springs and arc-shaped plug-in bodies fixedly connected to the bottom of the arc-shaped bottom groove (36). The base plate (38) is an annular plate. The fastening rod (39) is slidably inserted into the mounting base (32). The fastening rod (39) and the arc-shaped trigger component (37) are set perpendicularly to each other on the same horizontal plane.

7. The bedding fabric breathability testing device according to claim 4, characterized in that: The third component includes a top cover (41) that is bolted to the top of the mounting cavity (21). A straight groove is formed on the side of the top cover (41) near the mounting cavity (21). A trigger rod (42) is fixedly connected to the outer shell (27) below the top cover (41). The trigger rod (42) engages with the straight groove on the top cover (41). The trigger rod (42) is perpendicular to the outer shell (27). The end of the trigger rod (42) away from the outer shell (27) is fixedly connected to… A vertical rod (48) is connected to the trigger rod (42). The top cover (41) is fixedly connected to an inverted L-shaped positioning body (43) on the side near the trigger rod (42). A limiting groove (44) is opened in the middle of the upper surface of the inverted L-shaped positioning body (43). The limiting groove (44) and the trigger rod (42) are horizontally arranged on the same vertical line. Limiting posts (45) are fixedly connected to both sides of the end of the inverted L-shaped positioning body (43) away from the top cover (41).

8. The bedding fabric breathability testing device according to claim 7, characterized in that: The third component also includes an L-shaped body (46) disposed on both sides of the inverted L-shaped positioning body (43) away from the top cover (41). The L-shaped body (46) has a sliding groove (47) inside. The limiting post (45) is slidably connected in the sliding groove (47). The end of the vertical rod (48) away from the trigger rod (42) is fixedly connected to the L-shaped body (46). The end of the L-shaped body (46) away from the limiting post (45) is fixedly connected to a connecting rod group (49). The connecting rod group (49) consists of symmetrical rods and a pushing block. The L-shaped body (46) has an L-shaped cross section. The inverted L-shaped positioning body (43) is symmetrically arranged in two sets with the mounting base (32) as the center. The symmetrical plane of the inverted L-shaped positioning body (43) is an arc that fits against the outer arc surface of the nozzle.

9. The bedding fabric breathability testing device according to claim 7, characterized in that: The third component also includes a convex housing (410) fixedly connected to the outer ring of the rotating body (210). The convex housing (410) is located directly below the inverted L-shaped positioning body (43). The cross-section of the convex housing (410) is convex. A connecting rod assembly (49) is slidably connected inside the convex housing (410). A reset assembly (411) is fixedly connected to the upper surface of the end of the connecting rod assembly (49) away from the L-shaped body (46). The end of the reset assembly (411) away from the connecting rod assembly (49) is fixedly connected to the top of the convex housing (410). The reset assembly (411) is composed of a spring and a pneumatic rod.

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