Screen mesh tensioning structure and screen mesh
By designing the tensioning structure and installing elastic strips on the screen of the material screening equipment, the problem of easy hole blockage and damage of the screen is solved, the anti-blocking performance and service life are improved, and the screening efficiency is enhanced.
Patent Information
- Application Number
- CN202421162692.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The screens of existing material screening equipment are prone to hole blockage, damage and difficult to replace, which affects the service life and screening efficiency of the screen.
A screen tensioning structure is designed, including a tension hook, a first connection and a tensioning adjustment mechanism, to prevent hole blockage and extend the screen life by adjusting the tension, and to install elastic strips on the screen to prevent material clogging.
By adjusting the tension of the screen, the anti-blocking performance of the screen is improved, the service life of the screen is extended, and the screening efficiency is improved.
Smart Images
Figure CN222587285U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of material screening, in particular to a screen tensioning structure and a screen. Background Art
[0002] The screening equipment commonly used in the field of material screening now has problems such as screen blockage, easy damage and difficult replacement. In particular, the screening equipment used in the sand-making plant has a multi-layer screen arrangement, which can classify materials of various sizes in a limited space, but the distance between the upper and lower layers of the screen is small, and there is no maintenance space inside. The small-aperture screens used for sand and gravel aggregates on the existing market are generally metal diamond screens, which have a certain anti-blocking effect. However, when screening fine and sticky materials, screen blockage and damage problems still occur frequently, affecting the service life and screening efficiency of the screen.
[0003] The existing screen has a method of using a metal chain to prevent vibration and blockage to increase the service life of the screen, but the metal chain itself is heavy, which increases the weight of the screen, increases the difficulty of installing and replacing the screen, and there is a risk of impact and wear on the screen during the striking process. Utility Model Content
[0004] The purpose of the utility model is to provide a screen tensioning structure and a screen, which is equipped with a tensioning structure based on an ordinary anti-blocking screen, is easy to disassemble and install, improves the anti-blocking performance of the screen, and prolongs the service life of the screen. To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0005] In a first aspect, the utility model provides a screen tensioning structure, characterized in that it comprises a first connecting member 15,
[0006] A tensioning hook 16 extending from the body of the screen 1 is provided on one side edge of the screen 1, and the tensioning hook 16 is arranged on the opposite side or fixedly arranged; the first connecting member 15 includes a first support beam 13, a buckle 11 and a tensioning adjustment mechanism, and the tensioning adjustment mechanism includes a push rod 7 and a push rod driving member; the first support beam 13 is fixedly arranged; the buckle 11 is fixedly arranged on one side of the upper end surface of the first support beam 13, and can be engaged with the tensioning hook 16; the push rod 7 is slidably arranged on the upper end surface of the first support beam 13, and the push rod driving member is used to drive the push rod 7 to slide toward the buckle 11 or away from the buckle 11; when the buckle 11 is engaged with the tensioning hook 16, the push rod 7 can slide to contact the tensioning hook 16, and push the tensioning hook 16 to drive the screen 1 to deform.
[0007] The utility model can adjust the tightness of the screen, so as to avoid shortening the life of the screen due to over-tightening during use of the screen, and can make the screen easy to replace and install, thereby improving the working efficiency during screening.
[0008] Optionally, a mounting plate 12 is provided on the first support beam 13 on the opposite side of the buckle 11; the push rod driving component is installed on the side of the mounting plate 12 away from the buckle 11; the mounting plate 12 is provided with a threaded hole penetrating the plate surface; the push rod driving component includes a screw rod and a first nut 10; the first nut 10 is threadedly connected to one end of the screw rod, and the other end of the screw rod can be threadedly connected to the threaded hole and contact the push rod 7; the screw rod cooperates with the first nut 10 to move and fix along the inner thread of the threaded hole, and can drive the push rod 7 to slide and position.
[0009] The screw rod cooperates with the first nut 10 to adjust the position of the screw rod, thereby adjusting the position of the push rod 7 and changing the deformation degree of the tensioning hook 16.
[0010] Optionally, the screen tensioning structure includes an elastic buffer 8 and a second nut 9, wherein the elastic buffer 8 is sleeved on the outer periphery of the screw rod between the mounting plate 12 and the first nut 10, and the second nut 9 is threadedly connected to the screw rod along one end of the screw rod away from the mounting plate 12. When the first nut 10 is fixed in position, screwing the second nut 9 can make it fit the first nut 10 until it is fixed in position, and / or the elastic buffer 8 is a disc spring or a compression spring.
[0011] The addition of the elastic buffer 8 can avoid over-tensioning, and when the working screen is working, the screen tension force is buffered to prevent the screen from being damaged. When fixing the tension of the screen, the second nut 9 cooperates with the first nut 10 to fix the position of the screw rod, which has the effect of double nut anti-loosening and protecting the screw rod thread.
[0012] Optionally, the push rod driving component adopts a cylinder, which is installed on the first support beam 13, and its piston rod is fixedly connected to the push rod 7 and can drive the push rod 7 to approach or move away from the buckle 11, or the motor is fixedly connected to the first support beam 13, and the motor output shaft is connected to the connecting rod mechanism, and the connecting rod mechanism includes a fixed rod, a movable rod and a hinge, the output shaft is fixedly connected to the fixed rod, the hinge connects the fixed rod and the movable rod, and the movable rod is fixedly connected to the push rod 7. When the motor is running, the movable rod can drive the push rod 7 to approach or move away from the buckle 11.
[0013] In addition to manual adjustment, the push rod drive can also use a cylinder or other machinery, such as a motor, in conjunction with a corresponding transmission mechanism to convert the motor's rotational motion into linear motion, driving the push rod to achieve reciprocating motion.
[0014] Optionally, the tensioning hook 16 is provided on one side edge of the screen 1, and the second connecting member 14 is hingedly connected to the opposite side, and the second connecting member is fixedly provided.
[0015] The screen 1 can be provided with a tensioning mechanism on one side and fixed at the other end.
[0016] Optionally, a sleeve is provided on the edge of the screen 1 for connecting to the second connecting member 14; the second connecting member 14 includes a second support beam 5 and a pin 6 fixed to the second support beam 5; the sleeve of the screen 1 is movably sleeved on the pin 6.
[0017] Optionally, a screen support beam 4 is arranged below the screen 1 , and the screen support beam 4 is arc-shaped, and a plurality of screen support beams 4 are arranged in an arc shape along the length direction of the screen 1 .
[0018] The screen support beam 4 can support the middle position of the screen 1 , and the arc-shaped design presets a certain initial deformation of the screen, making it easier to adjust and control the deformation degree of the screen 1 .
[0019] In the above technical scheme, the utility model adopts the form of setting tensioning mechanisms on both sides of the screen or setting a tensioning mechanism on one side and fixing the other side, which is convenient for adjusting the tension of the screen and replacing the fixed screen, thereby extending the service life of the screen.
[0020] In a second aspect, the utility model provides a screen using the screen tensioning mechanism described in the first aspect, wherein at least one edge of the screen (1) is provided with a limit hook 3, and an elastic strip 2 is hung on the limit hook 3, and the elastic strip 2 extends on the upper surface of the screen 1.
[0021] The screen 1 is equipped with elastic strips 2, which can beat and clean the screen 1 through the jumping and twisting of the elastic strips 2 when the screen 1 is working, effectively preventing the material from clogging the screen holes or sticking to the screen wire diameter.
[0022] Optionally, the limiting hooks 3 are provided on both sides of the screen 1 in the length direction and / or width direction, and at least one end of the elastic strip 2 is hooked on the limiting hook 3, or both ends of the elastic strip 2 are respectively hooked on the limiting hooks 3 on opposite sides.
[0023] The limit hooks 3 are symmetrically arranged on the edges of the upper end surfaces on both sides of the screen 1 . The arrangement form of the elastic strip 2 is not limited, and at least one end thereof can be hung on the limit hook 3 .
[0024] Optionally, the elastic strip 2 is made of a lightweight elastic material, with a mounting hole 17 provided at one or both ends, and / or the elastic strip 2 is straight or wavy, and / or the elastic strip 2 is a polyurethane strip.
[0025] Polyurethane strips have good stability, chemical resistance, resilience and mechanical properties, are light in weight, low in price and cost-effective. The elastic strips are long strips, and the specific shape is not limited to straight strips or wavy shapes.
[0026] Beneficial effects:
[0027] Compared with the prior art, the utility model has the following advantages and progress:
[0028] The utility model provides a screen tensioning mechanism, which makes it easy to adjust the screen tension and replace the fixed screen. Different tensions affect the shape of the screen holes, which meets the anti-blocking requirements of different types of materials and prolongs the service life of the screen.
[0029] Furthermore, the specific implementation form of the screen tensioning mechanism is limited, and an elastic strip is installed to provide a practical screen tensioning mechanism and screen, which can facilitate the adjustment of the screen tensioning degree, easy to replace the screen, and has a stable structure, while taking into account the service life and anti-blocking effect.
[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a schematic structural cross-sectional diagram of an embodiment of the utility model;
[0032] Figure 2 yes Figure 1 A magnified schematic diagram of the local structure Ⅰ;
[0033] Figure 3 yes Figure 1 A top view of
[0034] Figure 4 This is a schematic diagram of the appearance of the elastic strip of the utility model;
[0035] Description of reference numerals:
[0036] 1-screen; 2-elastic strip; 3-limiting hook; 4-screen support beam; 5-second support beam; 6-pin shaft; 7-top rod; 8-elastic buffer; 9-second nut; 10-first nut; 11-buckle; 12-mounting plate; 13-first support beam; 14-second connecting piece; 15-first connecting piece; 16-tensioning hook; 17-mounting hole. DETAILED DESCRIPTION
[0037] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the utility model and its application or use.
[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0039] In addition, in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0040] Embodiment 1
[0041] This embodiment introduces a screen tensioning mechanism, combined with Figure 3 , comprising: a first connecting member 15;
[0042] A tensioning hook 16 extending from the body of the screen 1 is provided on one side edge of the screen 1, and the tensioning hook 16 is arranged on the opposite side or fixedly arranged; the first connecting member 15 includes a first support beam 13, a buckle 11 and a tensioning adjustment mechanism, and the tensioning adjustment mechanism includes a push rod 7 and a push rod driving member; the first support beam 13 is fixedly arranged; the buckle 11 is fixedly arranged on one side of the upper end surface of the first support beam 13, and can be engaged with the tensioning hook 16; the push rod 7 is slidably arranged on the upper end surface of the first support beam 13, and the push rod driving member is used to drive the push rod 7 to slide toward the buckle 11 or away from the buckle 11; when the buckle 11 is engaged with the tensioning hook 16, the push rod 7 can slide to contact the tensioning hook 16, and push the tensioning hook 16 to drive the screen 1 to deform.
[0043] refer to Figure 1 and Figure 2In application, when it is necessary to increase the tension of the screen 1, the push rod driving member drives the push rod 7 to slide to the right to squeeze the tensioning hook 16, so that the screen 1 is squeezed to present a more obvious curvature; conversely, when it is necessary to reduce the tension of the screen 1, the push rod driving member drives the screen to slide to the left to relax the squeezing of the tensioning hook 16, so that the screen 1 opens and presents a relatively gentle curvature.
[0044] refer to Figure 2 The portion of the top rod 7 that contacts the tension hook 16 can be a sloped structure, so that the top rod 7 and the tension hook 16 have a good shape fit, ensuring that the two have sufficient contact surface, and can stably adjust the tension of the screen 1. At the same time, it can also avoid the adverse effects of multiple push-and-relax processes on the initial hook shape of the tension hook 16, thereby extending the service life of the screen 1. The portion of the top rod 7 that contacts the tension hook 16 can also be a conjugate structure of the curvature of the tension hook 16, as well as other shapes that fit the tension hook 16.
[0045] The screen tensioning structure can change its position accordingly with different forms of the screen 1, see Figure 1 When a tensioning hook 16 is provided on the left side of the screen 1 and is fixed on the right side, the screen tensioning structure is arranged on the left side of the screen 1; by analogy, when a tensioning hook 16 is provided on the right side of the screen 1 and is fixed on the left side, the screen tensioning structure is arranged on the right side of the screen 1; when tensioning hooks 16 are provided on both sides of the screen 1, the screen tensioning structure is arranged on both sides of the screen 1.
[0046] When the tensioning hook 16 is arranged on one edge of the screen 1, the second connecting member 14 is hinged on the opposite side, and the second connecting member 14 is fixedly arranged. That is, the screen 1 can be in the form of a tensioning mechanism installed on one side and a fixed arrangement on the other end. Figure 1 As shown, the edge of the screen 1 for connecting to the second connecting member 14 is provided with a sleeve; the second connecting member 14 includes a second support beam 5 and a pin 6 fixed on the second support beam 5; the sleeve of the screen 1 is movably sleeved on the pin 6.
[0047] A tensioning hook 16 is provided on one side of the screen to connect to the first connecting member 15, and the second connecting member 14 is hinged on the opposite side, or tensioning hooks 16 are provided on both sides to connect to the first connecting member 15. This embodiment can conveniently adjust the tension of the screen and make the screen easy to replace and install.
[0048] Embodiment 2
[0049] Based on Example 1, this example introduces a screen tensioning mechanism that can more specifically adjust the screen tension. Figures 1 to 3 As shown, the screen tensioning mechanism of this embodiment includes a specific implementation form of a push rod driving member and a screen structure form that is more convenient for tensioning. Specifically, it includes the following contents:
[0050] 1. Specific implementation form of the ejector drive member;
[0051] The push rod drive can be realized manually or mechanically, wherein mechanical drive is usually realized by a cylinder or a motor.
[0052] When the push rod driving member is driven manually, a mounting plate 12 is provided on the first support beam 13 on the opposite side of the buckle 11; the push rod driving member is installed on the side of the mounting plate 12 away from the buckle 11; the mounting plate 12 is provided with a threaded hole penetrating the plate surface; the push rod driving member includes a screw and a first nut 10; the first nut 10 is threadedly connected to one end of the screw, and the other end of the screw can be threadedly connected to the threaded hole and contact the push rod 7; the screw cooperates with the first nut 10 to move and fix along the inner thread of the threaded hole, and can drive the push rod 7 to slide and position. Reference Figure 2 When increasing the tension of the screen 1, the screw rod cooperates with the first nut 10 to make axial movement and horizontal movement to the right along the internal thread of the threaded hole, pushing the push rod 7 to slide to the right and squeeze the tensioning hook 16 to tension the screen 1; when reducing the tension of the screen 1, the screw rod cooperates with the first nut 10 to make axial movement and horizontal movement to the left along the internal thread of the threaded hole, driving the push rod 7 to slide to the left to loosen the tensioning hook 16 and thus loosen the screen 1; when the tension of the screen is adjusted, the first nut 10 makes axial movement and horizontal movement to the right along the screw rod thread and is screwed to the screw rod to fix it, so that the position of the push rod 7 is fixed, and the current tension of the screen 1 is fixed.
[0053] The push rod 7 and the screw rod may also be connected by a bearing to reduce the friction on the push rod caused by the rotation of the screw rod.
[0054] In order to better adjust and fix the adjusted screen tension, the screen tensioning structure includes an elastic buffer 8 and a second nut 9. The elastic buffer 8 is sleeved on the outer periphery of the screw rod between the mounting plate 12 and the first nut 10. The second nut 9 is threadedly connected to the screw rod along the end of the screw rod away from the mounting plate 12. When the first nut 10 is fixed in position, screwing the second nut 9 can make it fit the first nut 10 until it is fixed in position, and / or the elastic buffer 8 is a disc spring or a compression spring.
[0055] The addition of the elastic buffer 8 can avoid over-tensioning, and when the working screen is working, the screen tension force is buffered to prevent the screen from being damaged. When fixing the tension of the screen, the second nut 9 cooperates with the first nut 10 to fix the position of the screw rod, which has the effect of double nut anti-loosening and protecting the screw rod thread.
[0056] When the push rod driving member adopts a mechanical form, a cylinder can be used. When the push rod driving member adopts a cylinder, the cylinder is installed on the first support beam 13, and its piston rod is fixedly connected to the push rod 7. The horizontal extension of the piston rod can drive the push rod 7 to approach or move away from the buckle 11, thereby adjusting the tension of the screen 1.
[0057] The ejector drive can also be other mechanical parts, such as motors. When a motor is used, the motor output shaft is connected to the transmission mechanism, the transmission mechanism is connected to the ejector, and the rotational motion of the motor when running is converted and transmitted through the connecting rod mechanism to realize the linear motion of the ejector. The specific implementation method varies depending on the mechanism design, and it can achieve reciprocating linear motion of the ejector on the fixed rod.
[0058] 2. Screen structure that is easy to tension
[0059] refer to Figure 1 A screen support beam 4 is arranged below the screen 1 , and the screen support beam 4 is arc-shaped. A plurality of screen support beams 4 are arranged in an arc shape along the length direction of the screen 1 .
[0060] The screen support beam 4 can support the middle position of the screen 1, so that the structure of the screen 1 is stable and can provide reliable bearing capacity during operation. The curved screen support beam and the curved screen support beam arranged as a whole make the screen as a whole stable and present an arc shape, providing a certain initial deformation of the screen. Compared with the screen with an extruded plane, the curved screen is more convenient to adjust and control the deformation degree of the screen.
[0061] refer to Figure 3 The screen 1 can be a metal diamond-shaped screen used for screening fine materials and has a certain anti-blocking effect. The aforementioned length direction only provides the installation direction of the screen support beam with reference to the direction in which the connecting piece is set, that is, a tensioning mechanism is set in the width direction of the screen 1, and a screen support beam 4 is set in the length direction of the screen 1, which can make the tension of the screen easier to adjust.
[0062] Embodiment 3
[0063] This embodiment introduces a screen based on embodiment 1 or 2. In order to better extend the service life of the screen, this embodiment provides an effective anti-blocking screen.
[0064] refer to Figure 1 and Figure 3 , at least one edge of the screen 1 is provided with a limit hook 3, that is, the screen 1 can be provided with a limit hook 3 on one edge, or the limit hook 3 can be provided on both sides of the length direction and / or width direction of the screen 1, and the limit hook 3 is hung with an elastic strip 2, and the elastic strip 2 extends on the upper surface of the screen 1. At least one end of the elastic strip 2 is hung with the limit hook 3, and when the limit hook 3 is symmetrically arranged at both ends, the elastic strip 2 can be selected to be hung on the limit hooks 3 on the opposite sides at both ends.
[0065] refer to Figure 4 The elastic strip 2 is made of a lightweight elastic material, and a mounting hole 17 is provided at one or both ends, and / or the elastic strip 2 is straight or wavy, and / or the elastic strip 2 is a polyurethane strip.
[0066] The elastic strip 2 installed on the screen 1 can make the screen 1 jump and twist as the screen machine and the screen vibrate when the screen 1 is working, so as to beat and clean the screen 1, and effectively prevent the material from clogging the screen holes or sticking to the screen wire diameter.
[0067] refer to Figure 1 and Figure 3 The limit hooks 3 on the screen 1 are evenly arranged on both sides of the screen 1. Therefore, when the elastic strip is selected to be hung on one side of the limit hook 3, each elastic strip 2 can be arbitrarily hung on one side of the screen 1. Specifically, when the same direction is selected for hanging, the elastic strips 2 are all hung on the limit hooks 3 on the left side of the screen 1, or they can all be hung on the right side; when staggered installation is selected, one elastic strip 2 is hung on the limit hook 3 on the left side of the screen 1, the next one is hung on the right side, and the next one is hung on the left side. The staggered installation has multiple installation modes, which will not be repeated in this embodiment.
[0068] In addition, the utility model can also be equipped with fixing mechanisms on both sides or designed with suitable appearance shapes to match different models of screening machines according to the needs of actual applications, and can be applied to other occasions.
[0069] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.
Claims
1. A screen tensioning structure, characterized in that: comprising a first connecting member (15), A tensioning hook (16) extending from the body of the screen (1) is provided on one side edge of the screen (1), and the tensioning hook (16) is arranged on the opposite side or fixedly arranged; The first connecting member (15) comprises a first supporting beam (13), a buckle (11) and a tensioning adjustment mechanism, wherein the tensioning adjustment mechanism comprises a push rod (7) and a push rod driving member; The first support beam (13) is fixedly arranged; the buckle (11) is fixedly arranged on one side of the upper end surface of the first support beam (13) and can be engaged with the tensioning hook (16); the push rod (7) is slidably arranged on the upper end surface of the first support beam (13), and the push rod driving member is used to drive the push rod (7) to slide towards the buckle (11) or away from the buckle (11); When the buckle (11) and the tensioning hook (16) are in a state of being engaged, the push rod (7) can slide until it contacts the tensioning hook (16) and push the tensioning hook (16) to cause the screen (1) to deform.
2. The screen tensioning structure according to claim 1, characterized in that On the opposite side of the buckle (11), a mounting plate (12) is provided on the first support beam (13); The push rod driving member is mounted on a side of the mounting plate (12) facing away from the buckle (11); The mounting plate (12) is provided with a threaded hole penetrating the plate surface; The push rod driving member comprises a screw rod and a first nut (10); The first nut (10) is threadedly connected to one end of the screw rod, and the other end of the screw rod is threadedly connected to the threaded hole and contacts the push rod (7); The screw rod cooperates with the first nut (10) to move and fix along the inner thread of the threaded hole, and can drive the push rod (7) to slide and position.
3. The screen tensioning structure according to claim 2, characterized in that: comprising an elastic buffer (8) and a second nut (9), The elastic buffer (8) is sleeved on the outer circumference of the screw rod between the mounting plate (12) and the first nut (10). The second nut (9) is threadedly connected to the screw rod along an end of the screw rod away from the mounting plate (12); when the first nut (10) is fixed in position, the second nut (9) can be screwed to fit the first nut (10) until the position is fixed. And / or the elastic buffer (8) is a disc spring or a compression spring.
4. The screen tensioning structure according to claim 1, characterized in that: The push rod driving member is a cylinder, which is mounted on the first support beam (13). The piston rod of the cylinder is fixedly connected to the push rod (7) and can drive the push rod (7) to move closer to or away from the buckle (11).
5. The screen tensioning structure according to claim 1, characterized in that: The tensioning hook (16) is arranged on one side edge of the screen (1), and the second connecting member (14) is hingedly connected to the opposite side, and the second connecting member (14) is fixedly arranged.
6. The screen tensioning structure according to claim 5, characterized in that: The edge of the screen (1) used for connecting to the second connecting piece (14) is provided with a sleeve; The second connecting member (14) comprises a second supporting beam (5) and a pin shaft (6) fixed on the second supporting beam (5); The sleeve of the screen (1) is movably sleeved on the pin shaft (6).
7. The screen tensioning structure according to claim 1, characterized in that: Screen support beams (4) are arranged below the screen (1); the screen support beams (4) are arc-shaped; a plurality of screen support beams (4) are arranged in an arc shape along the length direction of the screen (1).
8. A screen, characterized in that: Adopting the screen tensioning structure described in any one of claims 1 to 7; At least one edge of the screen (1) is provided with a limit hook (3), an elastic strip (2) is hung on the limit hook (3), and the elastic strip (2) extends on the upper surface of the screen (1).
9. The screen according to claim 8, characterized in that: The limit hooks (3) are arranged on both sides of the screen (1) in the length direction and / or the width direction, and at least one end of the elastic strip (2) is hooked on the limit hook (3), or both ends of the elastic strip (2) are respectively hooked on the limit hooks (3) on two opposite sides.
10. The screen according to claim 8, characterized in that: The elastic strip (2) is made of a lightweight elastic material and has a mounting hole (17) at one or both ends. and / or the elastic strip (2) is straight or wavy, And / or the elastic strip (2) is a polyurethane strip.