A multifunctional strength detection device for collagen sausage casing

Abstract

This invention discloses a multifunctional strength testing device for collagen casings, relating to the field of sausage casing tensile strength testing technology. It includes: a testing platform, a main rod fixed to the platform, two fixing rings on the main rod, and mounting frames snapped onto opposite sides of the two fixing rings. A ring of evenly distributed support cylinders is rotatably connected to the mounting frames. A circular band is wound around two corresponding support cylinders on the two mounting frames, with an airbag placed in the center of the circular band. This invention uses the airbag to expand the circular band, applying radial compressive force to the casing to test its radial compressive strength. By controlling the rotational resistance of the support cylinders, the frictional resistance that the circular band needs to overcome during movement is changed, thus altering the magnitude of the axial tensile force on the casing during pulling, and testing its axial tensile strength. In this way, by pulling the casing, dual strength testing of different locations on the casing is achieved, reducing testing steps and improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of sausage casing tensile strength testing technology, and more particularly to a multifunctional strength testing device for collagen sausage casings. Background Technology

[0002] Collagen casings are edible artificial casings made from animal hides, tendons, etc., and are commonly used for making sausages, hams, and other meat products. After the collagen casings are formed, in order to ensure their production quality and prevent damage during filling and hanging, it is necessary to evaluate their radial compressive strength and axial tensile strength.

[0003] Currently, the radial compressive strength of sausage casings is usually tested by inflating the casings with air. However, when testing the axial tensile strength of sausage casings, it is necessary to sample the casings and test the samples using a tensile testing machine. Since the equipment used for the two strength testing methods is not the same, and the axial test is destructive, it will lead to sample loss and increase the number of operation steps, making the overall testing process cumbersome and inefficient. Summary of the Invention

[0004] This invention provides a multifunctional strength testing device for collagen casings, overcoming the shortcomings of inconsistent equipment, cumbersome testing procedures, and low efficiency in testing the mirror compressive strength and axial tensile strength of casings.

[0005] The technical implementation of the present invention is as follows: a multifunctional strength testing device for collagen casings, comprising: a testing platform, a main rod fixedly connected to the testing platform, two symmetrically distributed fixing rings on the main rod, the fixing ring on the side away from the testing platform being fixedly connected to the main rod, and the fixing ring on the side closer to the testing platform being slidably connected to the main rod for limiting, mounting frames being snapped onto opposite sides of the two fixing rings, and annularly distributed support springs being rotatably connected to the mounting frames, with a common circumferential band wound around the two corresponding support springs on the two mounting frames, the circumferential band being used to contact the casing, an air bladder being placed in the middle of the circumferential band, the air bladder being used to expand the circumferential band, a return spring being fixedly connected between the fixing ring on the side closer to the testing platform and the main rod, and a control component being provided on the main rod for controlling the rotational resistance of the support springs.

[0006] Furthermore, the surrounding band is made of an elastic material, and the elastic coefficient of the surrounding band is greater than the elastic coefficient of the return spring.

[0007] Furthermore, the control component includes: a hollow frame fixed to the side of the main rod away from the detection table; through holes are provided at the positions corresponding to all the support cylinders on the adjacent mounting frame; friction cylinders are fixed to the hollow frame near the through holes; the friction cylinders are made of elastic rubber; after the friction cylinders expand, they contact the corresponding support cylinders to provide frictional resistance for the rotation of the support cylinders.

[0008] Furthermore, an inner rod is fixedly connected to the main rod, and the main rod and the inner rod together form an annular cavity. The annular cavity and the inner rod are respectively connected to a separate air pump in the testing platform. The inner rod is connected to a number of annularly distributed connecting pipes. All the airbags correspond one-to-one with all the connecting pipes and are staggered. Two adjacent airbags are sealed and rotatably connected to the corresponding connecting pipes. The hollow frame is connected to the annular cavity.

[0009] Furthermore, positioning protrusions are provided on both sides of the surrounding belt, and the two positioning protrusions on the same surrounding belt are respectively located on both sides of the corresponding support cylinder. The positioning protrusions are used to maintain the stability of the relative position between the surrounding belt and the corresponding support cylinder.

[0010] Furthermore, when the airbag is in a free state and fully inflated, it is cylindrical. At this time, the diameter of the airbag is larger than the diameter of the supporting cartridge, which increases the contact area between the airbag and the corresponding surrounding band.

[0011] Furthermore, the friction cylinder is located inside the corresponding surrounding belt, the symmetry plane of the friction cylinder is coplanar with the symmetry plane of the corresponding supporting spring cylinder, the projections of the friction cylinder and the supporting spring cylinder on the plane where the end face of the fixed ring is located are both fan-shaped, and the central angle corresponding to the fan-shaped projection of the friction cylinder is smaller than the central angle corresponding to the fan-shaped projection of the supporting spring cylinder.

[0012] Furthermore, the surrounding belt is provided with equidistant friction ridges along its surrounding direction.

[0013] Furthermore, the projections of all the surrounding bands onto the plane containing the end face of the fixed ring are all fan-shaped, and the sum of the central angles corresponding to the fan-shaped projections of all the surrounding bands is greater than 300°.

[0014] Furthermore, a mounting ring is fixed to the main rod, and a set of support bars is provided at the position corresponding to each of the mounting rings and all the surrounding strips. Each set of support bars consists of multiple arc-shaped equidistant distributions, and the support bars are used to support the surrounding strips.

[0015] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: This invention uses an airbag to expand the surrounding belt and apply radial compressive force to the casing, thereby testing the radial compressive strength of the casing. By controlling the rotational resistance of the support spring, the frictional resistance that the casing needs to overcome to move the surrounding belt synchronously during being pulled is changed, thus changing the magnitude of the axial tensile force on the casing during being pulled, and testing the axial tensile strength of the casing. In this way, by pulling the casing, dual strength testing of different positions on the casing can be achieved, reducing the testing steps and improving testing efficiency.

[0016] The positioning protrusions bring the two ends of the wrapping belt inward. On the one hand, the positioning protrusions help stabilize the relative position of the wrapping belt and the corresponding support tube. On the other hand, the positioning protrusions change the overall shape of the wrapping belt, reducing the probability of fluid impurities on the casing flowing to the inside of the wrapping belt, thereby maintaining the stability of the friction coefficient between the wrapping belt and the support tube.

[0017] By limiting the diameter of the air bladder in its inflated state, the air bladder can remain flat under the tension of the surrounding belt after being compressed and expanded. This ensures that the air bladder and the surrounding belt are in surface contact, increasing the contact area between the casing and the surrounding belt, ensuring the friction between the casing and the surrounding belt, and reducing the probability of slippage between the casing and the surrounding belt. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the main rod and the surrounding belt of the present invention; Figure 3 This is a three-dimensional structural diagram of the surrounding belt and airbag of the present invention; Figure 4 This is a three-dimensional structural diagram of the airbag and hollow frame of the present invention; Figure 5 This is a three-dimensional structural diagram of the connecting pipe and support strip of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the hollow frame and friction cylinder of the present invention; Figure 7 This is a three-dimensional cross-sectional view of the surrounding belt of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1-Detection platform, 2-Main rod, 201-Annular cavity, 3-Fixing ring, 4-Mounting frame, 5-Supporting spring, 6-Circling belt, 601-Positioning protrusion, 602-Friction protrusion, 7-Airbag, 8-Reset spring, 9-Hollow frame, 901-Through hole, 10-Friction cylinder, 11-Inner rod, 12-Connecting pipe, 13-Mounting ring, 14-Supporting bar. Detailed Implementation

[0020] To make the above features and advantages of the present invention more readily understood, specific embodiments are described below in conjunction with the accompanying drawings, but the present invention is not limited thereto. Example 1

[0021] This embodiment discloses a multifunctional strength testing device for collagen casings, which solves the problems of inconsistent equipment used in the testing of the mirror compressive strength and axial tensile strength of casings, and the cumbersome and inefficient testing process.

[0022] See Figures 1 to 5 A multifunctional strength testing device for collagen casings includes: a testing platform 1, a main rod 2 fixedly connected to the testing platform 1, a winding traction mechanism installed on the left side of the testing platform 1, the winding traction mechanism being used to move the casing while keeping the length of the suspended section of the casing constant; the winding traction mechanism is an existing structure and is not shown in the attached drawings; two symmetrically distributed fixing rings 3 are provided on the main rod 2, the left fixing ring 3 being fixedly connected to the main rod 2, and the right fixing ring 3 being slidably connected to the main rod 2; mounting frames 4 are snapped onto the opposite sides of the two fixing rings 3; six evenly distributed ring-shaped support springs 5 ​​are rotatably connected to the mounting frames 4; the support springs 5 ​​are composed of an inner helical spring tube and an outer rubber sleeve, the helical spring tube being used to maintain the shape of the support springs 5 ​​and provide a flexible range for the support springs 5, and the rubber sleeve being used to maintain the friction between the support springs 5 ​​and the surrounding belt 6; two On the mounting bracket 4, two corresponding support cylinders 5 are wound with a common loop belt 6. The loop belt 6 is used to contact the casing. An air bladder 7 is placed in the middle of the loop belt 6 to expand the loop belt 6. Both the loop belt 6 and the air bladder 7 are made of wear-resistant material. The fixing ring 3 on the right side is fixed to the main rod 2 with an initial compression storage return spring 8. The return spring 8 provides a rightward tendency to the fixing ring 3 on the right side, thereby maintaining the tension of the six loop belts 6. The loop belt 6 is made of elastic material. The outer part of the loop belt 6 is in a stretched state, and the inner part of the loop belt 6 is in an undeformed state, so that the loop belt 6 can deform itself according to the shape of the support cylinder 5 under its own elastic force. The elastic coefficient of the loop belt 6 is greater than the elastic coefficient of the return spring 8, so that the loop belt 6 can pull the return spring 8 to deform. The main rod 2 is equipped with a control component for controlling the rotation resistance of the support cylinder 5.

[0023] The above setup enables the use of airbags 7 to expand the surrounding belt 6, applying radial compressive force to the casing to test its radial compressive strength. By controlling the rotational resistance of the support spring 5, the frictional resistance that the casing needs to overcome to move the surrounding belt 6 synchronously during being pulled is changed, thus altering the magnitude of the axial tensile force on the casing during pulling and testing its axial tensile strength. In this way, by pulling the casing, dual strength tests can be performed on different locations on the casing, reducing testing steps and improving testing efficiency.

[0024] It should be noted that in this embodiment, the airbag 7 can be a curved cylinder, and initially, only the middle part of it contacts the surrounding belt 6.

[0025] See Figures 3 to 6 The control components include: a hollow frame 9, which is fixed to the left side of the main rod 2. A set of through holes 901 is provided at the corresponding positions of all the support springs 5 ​​on the left mounting bracket 4. Each set of through holes 901 consists of three equally spaced holes. A friction cylinder 10 is fixed to the hollow frame 9 near any set of through holes 901. The friction cylinder 10 is made of elastic rubber and is fixed to the hollow frame 9 at only its two ends. This allows the middle part of the friction cylinder 10 to expand under air pressure. After the friction cylinder 10 expands, it contacts the corresponding support spring 5, thereby providing frictional resistance for the rotation of the support spring 5.

[0026] The above settings enable the control of the rotational resistance of the support cylinder 5 by controlling the air pressure inside the friction cylinder 10, thereby changing the contact area between the friction cylinder 10 and the corresponding support cylinder 5 and the interaction force between them.

[0027] See Figure 2 , Figure 5 and Figure 6 An inner rod 11 is fixedly connected inside the main rod 2. The main rod 2 and the inner rod 11 together form an annular cavity 201. The annular cavity 201 and the inner rod 11 are respectively connected to a separate air pump in the testing platform 1. The inner rod 11 is connected to six annularly distributed connecting pipes 12. All the airbags 7 correspond one-to-one with all the connecting pipes 12 and are staggered. The connecting pipe 12 is sealed and rotatably connected to its corresponding two airbags 7. The hollow frame 9 is connected to the annular cavity 201.

[0028] The double strength testing process for collagen casings is as follows: First, the pre-formed casings are placed on the main rod 2, and the casings are piled up on the right side of the main rod 2. Then, the left end of the casing is pulled to the left until the left end of the casing moves out of the main rod 2. The left end of the casing is then connected to the winding and pulling mechanism. During this process, the casing wraps the wrapping belt 6 inside it. Air is injected into the annular cavity 201 and the inner rod 11 using an air pump. The gas in the annular cavity 201 enters the hollow frame 9 and is injected into the friction cylinder 10 through the through hole 901, causing the friction cylinder 10 to expand and contact the corresponding support spring cylinder 5. This changes the friction between the support spring cylinder 5 and the friction cylinder 10.

[0029] Gas inside the inner rod 11 is injected into the air bladder 7 through the connecting pipe 12 and the conduit. The air bladder 7 expands and opens the middle of the circumferential band 6, increasing the maximum distance between the circumferential band 6 and the main rod 2. This causes the circumferential band 6 to gradually open the casing, and the length of the circumferential band 6 in the axial direction of the main rod 2 decreases. During this process, the circumferential band 6 pulls the right-side support spring 5, mounting bracket 4 and fixing ring 3 to move to the left together, and compresses the return spring 8. In this way, by controlling the air pressure inside the air bladder 7, the radial extrusion force of the circumferential band 6 on the casing can be controlled.

[0030] The casing is pulled to the left by the winding traction mechanism, changing the corresponding position of the casing and the air bladder 7, thereby applying the same radial compressive force to different positions on the casing, and realizing the test of the radial compressive strength of different positions of the casing. During the leftward movement of the casing, the friction force drives the surrounding belt 6 to move, causing the surrounding belt 6 to drive the corresponding two support spring cylinders 5 to rotate. During the movement of the surrounding belt 6, its inner and outer sides move relative to each other, and during the relative movement of the inner and outer sides of the surrounding belt 6, the corresponding air bladders 7 roll. All the air bladders 7 roll together, and the air bladders 7 maintain a stable connection with the connecting pipe 12 under the action of the rotary joint. During the rotation, the support spring cylinder 5 overcomes the frictional resistance between itself and the corresponding friction cylinder 10. Relying on the above frictional resistance, the tension of the suspended section of the casing (the suspended section refers to the part of the casing that is suspended between the main rod 2 and the winding traction mechanism) is maintained, thus the axial tensile strength of the suspended section of the casing is tested.

[0031] As the test proceeds, the sausage casings piled up on the right side of the main rod 2 gradually decrease until they are completely transferred to the winding and traction mechanism, thus completing the test on the sausage casing. In this way, the dual strength test of the sausage casing in both the axial and radial directions can be achieved through a simple traction action, reducing the operation steps and improving the operation efficiency. After the test of a single sausage casing is completed, the air pump in the control test platform 1 extracts the gas from the air bladder 7 and the friction cylinder 10, allowing the air bladder 7 and the friction cylinder 10 to recover under their own elasticity, and the wrapping belt 6 to recover its shape under the elastic force of the return spring 8. Example 2

[0032] This embodiment is a further optimization based on Embodiment 1.

[0033] See Figure 7 Positioning protrusions 601 are provided on both sides of the surrounding belt 6, and the two positioning protrusions 601 on the same surrounding belt 6 are located on both sides of the corresponding support cartridge 5.

[0034] The above configuration enables the two ends of the surrounding belt 6 to be brought inward by the positioning protrusion 601. On the one hand, the positioning protrusion 601 helps stabilize the relative position of the surrounding belt 6 and the corresponding support spring 5. On the other hand, the positioning protrusion 601 changes the overall shape of the surrounding belt 6, reducing the probability of fluid impurities on the casing flowing to the inside of the surrounding belt 6, thereby maintaining the stability of the friction coefficient between the surrounding belt 6 and the support spring 5.

[0035] See Figure 2 and Figure 3 When the airbag 7 is in a free state and fully inflated, it is cylindrical. At this time, the diameter of the airbag 7 is larger than the diameter of the supporting cartridge 5. In the initial state, the pressure inside the airbag 7 is insufficient to overcome the elastic force of the return spring 8, so the airbag 7 is in a compressed state (the folds at the connection points between the airbag 7 and the connecting tube 12 are not clearly shown in the attached figure). As the pressure inside the airbag 7 increases, the thickness of the airbag 7 in the radial direction gradually increases, and the contact area between the airbag 7 and the corresponding surrounding band 6 in the axial direction gradually decreases.

[0036] The above setting enables the airbag 7 to remain flat under the tension of the surrounding belt 6 after being inflated by limiting the diameter of the airbag 7 in the inflated state. This ensures that the airbag 7 and the surrounding belt 6 are in surface contact, increases the contact area between the casing and the surrounding belt 6, ensures the friction between the casing and the surrounding belt 6, and reduces the probability of slippage between the casing and the surrounding belt 6.

[0037] See Figure 3 The friction cylinder 10 is located inside the corresponding surrounding belt 6. The symmetry plane of the friction cylinder 10 is coplanar with the symmetry plane of the corresponding support spring cylinder 5. The projections of the friction cylinder 10 and the support spring cylinder 5 on the plane where the end face of the fixed ring 3 is located are both fan-shaped, and the central angle corresponding to the fan-shaped projection of the friction cylinder 10 is smaller than the central angle corresponding to the fan-shaped projection of the support spring cylinder 5.

[0038] The above settings can reduce the probability that fluid impurities on the casing will adhere to the friction cylinder 10 and affect the friction coefficient between the friction cylinder 10 and the support spring cylinder 5 by limiting the position of the friction cylinder 10, thereby improving the stability of the friction resistance between the support spring cylinder 5 and the friction cylinder 10 and ensuring the accuracy of axial tensile strength detection.

[0039] See Figure 3 and Figure 7The surrounding belt 6 is provided with equidistant friction protrusions 602 along its surrounding direction. The friction protrusions 602 can increase the frictional resistance between the surrounding belt 6 and the casing in the axial direction and reduce the frictional resistance between the surrounding belt 6 and the casing in the radial direction. Therefore, when the radial pressure resistance of the casing is tested, the radial friction force is reduced to limit the longitudinal tearing of the casing, thereby improving the test accuracy of radial pressure resistance.

[0040] See Figure 2 and Figure 7 All the projections of the surrounding bands 6 onto the plane of the fixed ring 3 end face are fan-shaped, and the sum of the central angles corresponding to the fan-shaped projections of all the surrounding bands 6 is greater than 300°. All the surrounding bands 6 provide circumferential support to the inside of the casing, making the radial force of the casing more consistent with the actual force during filling. Example 3

[0041] This embodiment is a further optimization based on embodiment 2.

[0042] See Figure 4 and Figure 5 The main rod 2 is fixed with a mounting ring 13 near the right fixing ring 3. A set of support bars 14 is provided at the position corresponding to each of the mounting rings 13 and all the surrounding belts 6. Each set of support bars 14 consists of three arc-shaped equal-distance distributions. The support bars 14 are used to support the inner side of the surrounding belts 6 and prevent the airbag 7 from expanding inward, thereby improving the response speed of the airbag 7 driving the deformation of the surrounding belts 6.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multifunctional strength testing device for collagen casings, characterized in that, include: A testing platform (1) is fixedly connected to a main rod (2). Two symmetrically distributed fixing rings (3) are provided on the main rod (2). The fixing ring (3) on the side furthest from the testing platform (1) is fixedly connected to the main rod (2), while the fixing ring (3) on the side closest to the testing platform (1) is slidably connected to the main rod (2). Mounting brackets (4) are snapped onto the opposite sides of the two fixing rings (3). Ring-shaped, evenly distributed support cartridges (5) are rotatably connected to the mounting brackets (4). On the mounting bracket (4), two corresponding support tubes (5) are wrapped with a common circumferential band (6), which is used to contact the casing. An air bladder (7) is placed in the middle of the circumferential band (6) to open the circumferential band (6). A return spring (8) is fixed between the fixing ring (3) near the testing table (1) and the main rod (2). A control component is provided on the main rod (2) to control the rotation resistance of the support tubes (5). The control component includes: A hollow frame (9) is fixed to the side of the main rod (2) away from the testing table (1). The hollow frame (9) and all the support cylinders (5) on the adjacent mounting frame (4) are provided with through holes (901). Friction cylinders (10) are fixed to the hollow frame (9) near the through holes (901). The friction cylinders (10) are made of elastic rubber. After the friction cylinders (10) expand, they contact the corresponding support cylinders (5) to provide friction resistance for the rotation of the support cylinders (5).

2. A multifunctional strength testing device for collagen casings according to claim 1, characterized in that, The surrounding band (6) is made of elastic material, and the elastic coefficient of the surrounding band (6) is greater than the elastic coefficient of the return spring (8).

3. A multifunctional strength testing device for collagen casings according to claim 1, characterized in that, An inner rod (11) is fixedly connected inside the main rod (2). The main rod (2) and the inner rod (11) together form an annular cavity (201). The annular cavity (201) and the inner rod (11) are respectively connected to a separate air pump in the testing platform (1). The inner rod (11) is connected to a number of annularly distributed connecting pipes (12). All the airbags (7) correspond one-to-one with all the connecting pipes (12) and are staggered. Two adjacent airbags (7) are sealed and rotatably connected to the corresponding connecting pipes (12) and are connected. The hollow frame (9) is connected to the annular cavity (201).

4. A multifunctional strength testing device for collagen casings according to claim 1, characterized in that, Positioning protrusions (601) are provided on both sides of the surrounding band (6). The two positioning protrusions (601) on the same surrounding band (6) are respectively located on both sides of the corresponding support cylinder (5). The positioning protrusions (601) are used to maintain the stability of the relative position between the surrounding band (6) and the corresponding support cylinder (5).

5. A multifunctional strength testing device for collagen casings according to claim 4, characterized in that, When the airbag (7) is in a free state and fully inflated, it is cylindrical. At this time, the diameter of the airbag (7) is larger than the diameter of the supporting bullet tube (5), which is used to increase the contact area between the airbag (7) and the corresponding surrounding band (6).

6. A multifunctional strength testing device for collagen casings according to claim 4, characterized in that, The friction cylinder (10) is located inside the corresponding surrounding belt (6). The plane of symmetry of the friction cylinder (10) is coplanar with the plane of symmetry of the corresponding support spring cylinder (5). The projections of the friction cylinder (10) and the support spring cylinder (5) on the plane where the end face of the fixed ring (3) is located are both fan-shaped, and the central angle corresponding to the fan-shaped projection of the friction cylinder (10) is smaller than the central angle corresponding to the fan-shaped projection of the support spring cylinder (5).

7. A multifunctional strength testing device for collagen casings according to claim 6, characterized in that, The surrounding belt (6) is provided with equidistant friction ridges (602) along its surrounding direction.

8. A multifunctional strength testing device for collagen casings according to claim 7, characterized in that, All the projections of the surrounding bands (6) onto the plane of the end face of the fixed ring (3) are fan-shaped, and the sum of the central angles corresponding to the fan-shaped projections of all the surrounding bands (6) is greater than 300°.

9. A multifunctional strength testing device for collagen casings according to claim 8, characterized in that, A mounting ring (13) is fixedly connected to the main rod (2). A set of support bars (14) is provided at the position corresponding to each of the mounting ring (13) and all the surrounding strips (6). Each set of support bars (14) consists of multiple arc-shaped equidistant distributions. The support bars (14) are used to support the surrounding strips (6).

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