Filter cartridge bandage testing mechanism

Abstract

The utility model discloses a filter cartridge bandage testing mechanism which comprises two groups of stretching devices which are oppositely arranged, the stretching device comprises a mounting seat, a fixed shaft and a bearing; the mounting seats of the two groups of stretching devices are respectively arranged at the moving end of the strength tester and the rack; a plurality of fixing shafts are installed on the side face of the installation base and are arranged at equal intervals in the horizontal direction, and the intervals are adjustable. The fixing shafts of the two groups of stretching devices are positioned on the opposite surfaces of the two mounting seats; and the bearing is axially mounted on the fixed shaft in a limiting manner. According to the utility model, equal tensile force can be provided for each bonding point of the binding band during the binding band strength test, the detection precision is improved, and the binding band bonding strength of filter cartridges with various specifications can be tested by one set of testing mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of filter material testing, in particular to a filter cartridge binding belt testing mechanism. Background Art

[0002] In the existing technical requirements standard for dust filter cartridges (hereinafter referred to as the "standard"), the part about the strength test requirements for the connection between the bandage and the filter material only roughly defines "several bonding points" and "a certain length", and does not clearly stipulate the sample processing requirements before the test. At the same time, the standard provides a corresponding test method: during the test, the filter material connected with the bandage is connected in a ring shape from head to tail, so that the bonding points between the bandage and the filter material are distributed in a ring shape, and then the connection between the head and tail of the filter material is fixed to the clamp of the strength machine, and then the hook of the strength machine is used to pull the free end of the bandage for testing.

[0003] Since the above-mentioned bonding points are distributed in a ring shape, the calculation method of taking the average value of the number of different bonding points that are broken at the same time has a greater impact. During the test process, the position of the bonding points of the straps varies greatly due to the influence of factors such as the stiffness of the filter material, the pleat depth material, and the number of pleats. This causes a large change in the angle between the force at each bonding point and the vertical force component. Each bonding point cannot ensure balanced force, which will affect the final test results. Moreover, the position of the hook of this test method cannot effectively ensure that it is at the center of the two bonding points. In addition, when the diameter of the filter cartridge is large, the stretching stroke of the strap and filter material may exceed the effective operating range of the strength machine, resulting in invalid test results. The test method provided by the standard has great limitations. Utility Model Content

[0004] The purpose of the utility model is to provide a filter cartridge strap testing mechanism to solve the problems existing in the prior art. It can provide equal pulling force for each bonding point of the strap during the strap strength test, thereby improving the detection accuracy. Moreover, a set of testing mechanisms can test the bonding strength of the straps of filter cartridges of various specifications.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A filter cartridge band testing mechanism comprises two sets of stretching devices arranged opposite to each other; the stretching devices comprise a mounting seat, a fixed shaft and a bearing; the mounting seats of the two sets of stretching devices are respectively arranged on the moving end and the frame of a strength machine; a plurality of fixed shafts are installed on the side of the mounting seat, and the fixed shafts are arranged at equal intervals in the horizontal direction and the intervals are adjustable; the fixed shafts of the two sets of stretching devices are located on the opposite surfaces of the two mounting seats; the bearing is axially limitedly mounted on the fixed shaft.

[0007] A slot for assembling the fixed shaft is provided on the side of the mounting seat, the slot extends along the length direction of the mounting seat, and a plurality of positioning slots are provided on the upper wall or the lower wall of the slot at equal intervals; a rib matching the positioning slot is provided on the upper surface or the lower surface of the fixed shaft; the rear end of the fixed shaft is inserted and placed in the slot and is loosely matched with the slot, and the rib is loosely matched with the positioning slot.

[0008] Preferably, the spacing of the positioning grooves is 0.5-1.5 mm, the width of the positioning grooves is 0.48-1.4 mm; the length of the slots is 100-120 mm; the width of the ribs is 0.45-1.34 mm; and the diameter of the fixed shaft is 3-5 mm.

[0009] Preferably, a locking hole is provided on the upper surface of the mounting seat, and the locking hole is downwardly connected to the upper wall of the slot; a threaded hole is provided on the circumferential surface of the rear end of the fixed shaft; a screw is passed through the locking hole and locked in the threaded hole to fix the fixed shaft.

[0010] A limiting flange is arranged on the circumferential surface of the middle end of the fixed shaft, the bearings are sequentially inserted into the front end of the fixed shaft, and the bearing located on the inner side abuts against the limiting flange, and the bearing located on the outer side is limited by a retaining ring; a limiting ring groove is arranged on the circumferential surface of the front end of the fixed shaft; the retaining ring is embedded in the limiting ring groove.

[0011] Preferably, the outer diameter of the bearing is 5 to 8 mm.

[0012] After adopting the above technical solution, the utility model has the following technical effects:

[0013] ① The utility model can test the separation of filter material and its binding tape by installing two sets of stretching devices on the moving end and the frame of the strength machine. The stretching device is provided with a fixed shaft with adjustable spacing and bearings installed. The fixed shaft can adjust the spacing according to the spacing between the bonding points of the filter material and the binding tape, so that the force of the stretching device on the filter material and the binding tape is applied to the center position of the adjacent bonding points, ensuring that the forces on each bonding point are equal during the test, thereby improving the test accuracy and effectiveness. At the same time, since the spacing of the fixed shafts is adjustable, the utility model only needs one set of testing mechanism to test the binding tape bonding strength of filter cartridges of various specifications;

[0014] ② The bearing can effectively reduce the friction between the filter material / bandage and the fixed shaft, so that there is only vertical tension between the bearing and the filter material / bandage, thereby avoiding the influence of friction on the test results;

[0015] ③ The utility model can realize multi-point synchronous stretching, and the relative displacement of the two sets of stretching devices is small, that is, the stroke is small, which can limit the strength technical requirements of the binding tape bonding point within the effective stroke range of the strength machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a specific embodiment of the utility model;

[0017] Figure 2 A three-dimensional diagram of a stretching device according to a specific embodiment of the utility model;

[0018] Figure 3 This is an exploded view of a stretching device according to a specific embodiment of the utility model;

[0019] Figure 4 It is a cross-sectional view of a stretching device according to a specific embodiment of the utility model;

[0020] Figure 5 This is a partial enlarged view of the mounting base of a specific embodiment of the utility model;

[0021] Figure 6 It is a schematic diagram of the use of a specific embodiment of the utility model;

[0022] Description of Figure Numbers:

[0023] 1---Stretching device; 11---Mounting seat; 111--Slot; 112--Location slot; 113--Locking hole; 12--Fixed shaft; 121--Rebar; 122--Threaded hole; 123--Limiting flange; 124--Limiting ring groove; 13---Bearing; 14---Screw; 15---Snap ring;

[0024] a----binding tape; b----filter material. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0026] refer to Figures 1 to 5 As shown, the utility model discloses a filter cartridge binding testing mechanism, comprising two sets of stretching devices 1 arranged opposite to each other;

[0027] The stretching device 1 comprises a mounting seat 11, a fixed shaft 12 and a bearing 13;

[0028] The mounting bases 11 of the two sets of stretching devices 1 are respectively arranged on the moving end and the frame of the strength machine (the strength machine is a prior art and is not shown in the figure); that is, one set of stretching devices 1 can move vertically up and down along with the moving end of the strength machine, and the other set of stretching devices 1 remains relatively fixed to the strength machine. The movement of the two sets of stretching devices 1 away from each other can achieve the stretching of the bandage a to break the bonding point;

[0029] A plurality of fixed shafts 12 are installed on the side of the mounting seat 11. The fixed shafts 12 are arranged at equal intervals in the horizontal direction and the intervals are adjustable. The intervals of the fixed shafts 12 are adjusted as needed to ensure that the intervals of the fixed shafts 12 are equal to the intervals of the bonding points. The fixed shafts 12 of the two sets of stretching devices 1 are located on the opposite surfaces of the two mounting seats 11, so as to respectively penetrate the filter material b and the connecting strap a from both sides of the filter material b.

[0030] The bearing 13 is mounted on the fixed shaft 12 in an axially limited manner.

[0031] Specific embodiments of the present utility model are shown below.

[0032] The mounting seat 11 can be mounted on a corresponding position of the strength machine by bolt locking, clamp fixing, etc.

[0033] The side of the mounting seat 11 is provided with a slot 111 for assembling the fixed shaft 12, the slot 111 extends along the length direction of the mounting seat 11, and the upper wall or lower wall of the slot 111 is provided with a plurality of positioning slots 112 at equal intervals; the upper surface or lower surface of the fixed shaft 12 is provided with ribs 121 matching the positioning slots 112, and the ribs 121 extend along the axial direction of the fixed shaft 12; the rear end of the fixed shaft 12 is inserted and placed in the slot 111 and is loosely matched with the slot 111, and the positioning and anti-rotation of the fixed shaft 12 are achieved through the cooperation of the ribs 121 and the positioning slots 112. During assembly, a fixed shaft 12 is assembled to each positioning slot 112 with a certain number of spacings, so that the spacing of the fixed shaft 12 can be adjusted. In this embodiment, the spacing of the positioning grooves 112 is 0.5 to 1.5 mm, and the width of the positioning grooves 112 is 0.48 to 1.4 mm; the length of the slot 111 is 100 to 120 mm; the width of the rib 121 is 0.45 to 1.34 mm; the fixed shaft 12 can be adjusted to a horizontal spacing of a minimum unit of 0.5 mm, and its diameter is 3 to 5 mm.

[0034] Furthermore, the upper surface of the mounting seat 11 is provided with a locking hole 113, which is connected downward to the upper wall of the slot 111; a threaded hole 122 is provided on the peripheral surface of the rear end of the fixed shaft 12; when the screw 14 is inserted into the locking hole 113 and locked in the threaded hole 122, the fixed shaft 12 is installed so that the fixed shaft 12 and the mounting seat 11 remain relatively fixed. The assembly method of this structure can better adapt to the adjustment of the fixed shaft 12, and the screw 14 can be directly inserted into the locking hole 113 and locked with the fixed shaft 12 when the fixed shaft 12 is adjusted to any position. In this embodiment, the threaded hole 122 is an M2 threaded hole.

[0035] A limiting flange 123 is provided on the circumferential surface of the middle end of the above-mentioned fixed shaft 12, and the bearings 13 are sequentially inserted into the front end of the fixed shaft 12, and the bearing 13 located on the inner side abuts against the limiting flange 123, while the bearing 13 located on the outer side is limited by a retaining ring 15, and the outer diameter of the bearing is 5 to 8 mm; a limiting ring groove 124 is provided on the circumferential surface of the front end of the fixed shaft 12; the retaining ring 15 is embedded in the limiting ring groove 124.

[0036] refer to Figure 6 As shown, the test process of the utility model is:

[0037] In this test process, it is clearly agreed that the number of bonding points that are broken is 10. Cut the filter material b of the filter cartridge along the middle seam and take a certain length to ensure that it contains 10 bonding points, and lay the cut filter material b flat so that the bonding points are distributed linearly. Two sets of stretching devices 1 are inserted from both sides of the filter material b respectively. Between each fold of the filter material b, there are two sets of stretching devices 1 with two fixed shafts 12 and their bearings 13 facing each other up and down. Then start the strength machine. The moving end of the strength machine moves upward with the stretching device 1 in the previous group, and generates tension on the strap a. The filter material b is fixed by the stretching device 1 in the next group until the bonding point of the strap a is broken, and the test is completed.

[0038] Through the above scheme, the utility model can test the separation of filter material b and its binding band a by installing two sets of stretching devices 1 on the moving end and the frame of the strength machine. The stretching device 1 has a fixed shaft 12 with adjustable spacing and a bearing 13 installed. The fixed shaft 12 can adjust the spacing according to the spacing between the bonding points of the filter material b and the binding band a, so that the force of the stretching device 1 on the filter material b and the binding band a is applied to the center position of the adjacent bonding points, ensuring that the forces on each bonding point are equal during the test, thereby improving the test accuracy and effectiveness; at the same time, because the fixed shaft 12 The spacing is adjustable, and the utility model only needs one set of testing mechanism to test the bonding strength of the bands of filter cartridges of various specifications; secondly, the bearing 13 can effectively reduce the friction between the filter material b / band a and the fixed shaft 12, so that there is only tension in the vertical direction between the bearing 13 and the filter material b / band a, thereby avoiding the influence of friction on the test results; the utility model can realize multi-point synchronous stretching, and the relative displacement of the two sets of stretching devices 1 is small, that is, the stroke is small, which can limit the technical requirements for the strength of the bonding point of the band a to the effective stroke range of the strength machine.

[0039] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A filter cartridge strap testing mechanism, characterized in that: It includes two sets of stretching devices arranged opposite to each other; The stretching device comprises a mounting seat, a fixed shaft and a bearing; The mounting bases of the two sets of stretching devices are respectively arranged on the moving end and the frame of the strength machine; A plurality of fixed shafts are installed on the side of the mounting seat, and the fixed shafts are arranged at equal intervals in the horizontal direction and the intervals are adjustable; the fixed shafts of the two sets of stretching devices are located on the opposite surfaces of the two mounting seats; The bearing is mounted on the fixed shaft in an axially limited manner.

2. The filter cartridge strapping testing mechanism according to claim 1, characterized in that: A slot for assembling the fixed shaft is provided on the side of the mounting seat, the slot extends along the length direction of the mounting seat, and a plurality of positioning slots are provided on the upper wall or the lower wall of the slot at equal intervals; a rib matching the positioning slot is provided on the upper surface or the lower surface of the fixed shaft; the rear end of the fixed shaft is inserted and placed in the slot and is loosely matched with the slot, and the rib is loosely matched with the positioning slot.

3. The filter cartridge strapping testing mechanism according to claim 2, characterized in that: The spacing between the positioning grooves is 0.5-1.5 mm, and the width of the positioning grooves is 0.48-1.4 mm; the length of the slot is 100-120 mm; the width of the rib is 0.45-1.34 mm; and the diameter of the fixed shaft is 3-5 mm.

4. The filter cartridge strapping testing mechanism according to claim 2, characterized in that: A locking hole is provided on the upper surface of the mounting seat, and the locking hole is downwardly connected to the upper wall of the slot; a threaded hole is provided on the circumferential surface of the rear end of the fixed shaft; a screw is inserted into the locking hole and locked in the threaded hole to fix the fixed shaft.

5. The filter cartridge band testing mechanism according to claim 1, characterized in that: A limiting flange is arranged on the circumferential surface of the middle end of the fixed shaft, the bearings are sequentially inserted into the front end of the fixed shaft, and the bearing located on the inner side abuts against the limiting flange, and the bearing located on the outer side is limited by a retaining ring; a limiting ring groove is arranged on the circumferential surface of the front end of the fixed shaft; the retaining ring is embedded in the limiting ring groove.

6. The filter cartridge strapping testing mechanism according to claim 5, characterized in that: The outer diameter of the bearing is 5 to 8 mm.

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