A vertical spiral scale

Abstract

The application relates to the technical field of vertical spiral scale clamping devices, and discloses a vertical spiral scale which comprises a rack, a clamping frame and a discharge pipe, the clamping frame comprises a connecting frame, a mounting frame and a clamping elastic pad, wherein: the top end of the connecting frame is rotationally hinged to the rack; the mounting frame is arranged at the bottom end position of the connecting frame, one side of the mounting frame is provided with a mounting groove; and the clamping elastic pad is arranged in the mounting groove and extends out of the mounting groove. The application has the effect of improving the clamping stability of a packaging bag.

Description

Technical Field

[0001] This application relates to the field of vertical screw scale clamping device technology, and in particular to a vertical screw scale. Background Technology

[0002] Vertical screw weighers, as precision continuous feeding and weighing devices, offer significant advantages in handling powder materials that are prone to bridging and have poor flowability. They typically consist of a vertically positioned screw conveyor and a discharge pipe located below it. To automate packaging operations, the bag openings must be reliably secured to the discharge pipe to prevent dust leakage, inaccurate metering, or even production interruptions caused by bag opening misalignment or detachment during material filling.

[0003] In existing technologies, a pneumatic clamping device is typically installed around the outer periphery of the discharge pipe to secure the packaging bag. This pneumatic clamping device includes a pair of symmetrically arranged clamping frames, which are rotatably mounted on a frame via a hinge shaft, and one or more cylinders as a drive source. The piston rods of the cylinders are connected to the clamping frames via a linkage mechanism or directly. By controlling the extension and retraction of the cylinder piston rods, the pair of clamping frames are driven to rotate around the hinge point, thereby opening and closing the clamping frames.

[0004] When it is necessary to clamp the packaging bag, the operator places the bag opening onto the predetermined position outside the discharge pipe. Subsequently, the cylinder retracts under the action of the control signal, pulling a pair of clamping frames closer together and rotating, thereby pressing the bag opening circumferentially against the outer wall of the discharge pipe to form a fixed shape.

[0005] However, due to the manufacturing tolerances of the cylinder itself, the elastic deformation of the internal seals, and the compressibility of the gas medium, there may still be a slight misalignment when the piston rod reaches the theoretical end of its stroke. This can cause the clamping frame to fail to reach the predetermined clamping position accurately and stably, resulting in insufficient or inconsistent clamping force on the packaging bag and affecting the clamping stability of the packaging bag. Utility Model Content

[0006] To improve the stability of clamping packaging bags, this application provides a vertical screw scale.

[0007] The vertical screw scale provided in this application adopts the following technical solution: A vertical screw scale includes a frame, a clamping frame, and a discharge pipe. The clamping frame includes a connecting frame, a mounting frame, and a clamping elastic pad, wherein: The top end of the connecting frame is rotatably hinged to the frame; the mounting bracket is located at the bottom end of the connecting frame, and a mounting groove is provided on one side of the mounting bracket; the clamping elastic pad is placed in the mounting groove and extends out of the mounting groove.

[0008] Optionally, the mounting bracket includes a crossbar and clamping plates, wherein the crossbar is located at the bottom end of the connecting bracket, and the clamping plates are provided in pairs, which clamp the crossbar and cooperate with the crossbar to form the mounting groove.

[0009] Optionally, the crossbar includes a positioning rod and a clamping rod, wherein the positioning rod is provided in pairs, and the pair of positioning rods are respectively provided at both ends of the clamping rod, and the positioning rod is provided on the connecting frame.

[0010] Optionally, the clamping rod is arranged in an arc shape.

[0011] Optionally, a push bolt is threaded onto the crossbar, and the push bolt contacts the clamping elastic pad.

[0012] Optionally, multiple push bolts are provided along the length of the crossbar.

[0013] Optionally, the clamping plate is provided with an observation groove, and the clamping elastic pad is provided with an observation rod, which is disposed through the observation groove.

[0014] Optionally, the observation rod is bonded to the clamping elastic pad near the end of the push bolt.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. The rubber clamping elastic pad combined with the arc-shaped clamping rod can adaptively wrap and press the bag opening, effectively compensating for the cylinder's misalignment, ensuring stable and uniform clamping force, thereby significantly improving the sealing and reliability of the packaging process; 2. Multiple push bolts arranged along the length of the crossbar allow for independent and precise fine-tuning of the compression of different parts of the clamping elastic pad. This function can compensate for manufacturing tolerances and wear, ensure uniform circumferential force on the packaging bag opening, and optimize the clamping effect. 3. The clamping plate and crossbar are connected by screws, which facilitates the disassembly and replacement of the clamping elastic pad; at the same time, the cooperation between the observation rod and the observation slot provides intuitive visual feedback, which can effectively prevent damage to the elastic pad due to excessive adjustment of the push bolt, thus improving maintenance convenience and operational safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a schematic diagram illustrating the relative positions of the feed tube and the clamping frame in an embodiment of this application.

[0018] Figure 3 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0019] Explanation of reference numerals in the attached figures: 1. Frame; 2. Clamping frame; 3. Discharge pipe; 4. Connecting frame; 5. Mounting frame; 51. Crossbar; 511. Positioning rod; 512. Pressing rod; 52. Clamping plate; 521. Observation slot; 53. Mounting slot; 6. Clamping elastic pad; 61. Observation rod; 7. Push bolt. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0021] This application discloses a vertical screw scale.

[0022] A vertical screw scale includes a frame 1, a clamping frame 2, and a discharge pipe 3. The clamping frame 2 further includes a connecting frame 4, a mounting frame 5, and a clamping elastic pad 6. The top end of the connecting frame 4 is rotatably connected to the frame 1 by a hinge. The mounting frame 5 is fixedly disposed at the bottom end of the connecting frame 4, and a mounting groove 53 is formed on the surface of the mounting frame 5 facing the discharge pipe 3. The clamping elastic pad 6 is fixedly disposed inside the mounting groove 53, and part of its structure protrudes outward from the mounting groove 53. The clamping elastic pad 6 is made of rubber.

[0023] When the clamping frame 2 closes towards the discharge pipe 3 under the action of a driving device, such as a cylinder, the elastic clamping pad 6 is the first part to come into contact with the opening of the packaging bag. Under continuous pressure, the elastic pad will compress and deform, and this deformation can adaptively fill the microscopic gaps between the clamping frame 2 and the outer wall of the packaging bag and the discharge pipe 3. The rebound force generated by the deformation of the elastic pad provides a uniform and flexible radial clamping force to the bag opening, thereby achieving stable clamping.

[0024] During operation, when it is necessary to clamp the packaging bag, the drive unit actuates, pushing a pair of clamping frames 2 to rotate around their top hinge point, causing them to move closer to the center of the discharge pipe 3. As the clamping frames 2 close, the clamping elastic pads 6, fixed in the mounting grooves 53 of the mounting bracket 5, first contact and press against the opening of the packaging bag fitted onto the discharge pipe 3. As the drive stroke continues, the clamping elastic pads 6 are compressed and undergo elastic deformation, compressing the portion extending out of the mounting grooves 53, thereby tightly wrapping and pressing the bag opening against the outer circumferential surface of the discharge pipe 3, completing the clamping action.

[0025] Mounting bracket 5 includes a crossbar 51 and a pair of clamping plates 52. The crossbar 51 is fixedly mounted at the bottom end of the connecting bracket 4. The pair of clamping plates 52 are mounted opposite each other on the crossbar 51, and the pair of clamping plates 52 cooperate with the crossbar 51 to form a mounting groove 53 for accommodating and clamping the elastic pad 6.

[0026] During the assembly of the clamping frame 2, the clamping elastic pad 6 is placed into the mounting groove 53 formed by the crossbar 51 and a pair of clamping plates 52. When the clamping frame 2 is driven to move, the force is transmitted to the crossbar 51 at the bottom through the connecting frame 4, thereby driving the entire mounting frame 5 and the clamping elastic pad 6 fixed in its groove to move synchronously, realizing the clamping operation of the packaging bag.

[0027] The clamping plate 52 is detachably connected to the crossbar 51 by screws, so that the mounting groove 53 can be opened when needed, making it easy to place the clamping elastic pad 6 into the mounting groove 53 formed by the crossbar 51 and the clamping plate 52, and after installation, the clamping plate 52 and the crossbar 51 are firmly connected by tightening the screws.

[0028] The use of screw connections makes the assembly and disassembly of the mounting bracket 5 simple and quick, greatly facilitating the initial installation of the clamping elastic pad 6 and subsequent replacement or maintenance work that may be required.

[0029] The crossbar 51 consists of a clamping rod 512 and a pair of positioning rods 511. The pair of positioning rods 511 are fixedly connected to both ends of the clamping rod 512. The positioning rods 511 are fixedly installed at the bottom end of the connecting frame 4, so that the entire crossbar 51 is stably connected to the connecting frame 4.

[0030] The clamping rod 512 has an arc-shaped structure. Mounting grooves 53 are also provided on a pair of positioning rods 511. These mounting grooves 53 together with the mounting grooves 53 on the clamping rod 512 form a continuous groove structure, and the clamping elastic pad 6 is constrained in the complete groove formed by the clamping rod 512 and the positioning rod 511.

[0031] When installing the clamping elastic pad 6, it is placed in the arc-shaped mounting groove 53 of the clamping rod 512, and both ends of the elastic pad are respectively embedded in the mounting grooves 53 of a pair of positioning rods 511. When the clamping frame 2 performs the clamping action, the clamping elastic pad 6 is subjected to radial compressive force, and its two ends are constrained by the groove walls of the positioning rods 511, so that misalignment, slippage or twisting will not occur. Multiple push bolts 7 are threaded onto the crossbar 51, and these push bolts 7 are arranged along the length of the crossbar 51. One end of each push bolt 7 is in contact with the back of the clamping elastic pad 6. By turning the push bolt 7, its length extending out of the crossbar 51 can be changed, thereby producing different degrees of local pushing force on the clamping elastic pad 6.

[0032] By individually adjusting the screw-in depth of each push bolt 7, a precisely controllable local preload is applied to the clamping elastic pad 6 at its end. This design enables local fine-tuning of the gap between the clamping elastic pad 6 and the discharge pipe 3, allowing the compression of the elastic pad to be controlled according to actual needs.

[0033] During debugging or maintenance, operators use tools to tighten each push bolt 7. When a push bolt 7 is screwed in towards the clamping elastic pad, the elastic pad at that location is pushed outward, increasing the pre-compression at that point; conversely, when the push bolt 7 is screwed back, the rebound space of the elastic pad at that location increases accordingly. By adjusting multiple push bolts 7 individually, the working surface of the clamping elastic pad 6 can be made to form a clamping curved surface that precisely matches the outer contour of the discharge pipe 3.

[0034] An observation slot 521 is provided on the clamping plate 52. An observation rod 61 is fixedly mounted on the clamping elastic pad 6, passing through the observation slot 521 and movable within the range defined by the observation slot 521. The end of the observation rod 61 is fixedly connected to the clamping elastic pad 6 by adhesive bonding, and its installation position is located in the contact area of ​​the clamping elastic pad 6 near the side of the push bolt 7. The observation rod 61 is provided to visually indicate the adjustment stroke of the push bolt 7.

[0035] The observation rod 61 is fixed in the area where the clamping elastic pad 6 is directly acted upon by the push bolt 7. When the push bolt 7 is screwed in and pushes against the clamping elastic pad 6, it will cause the observation rod 61 to move accordingly in the observation groove 521. By observing the relative position of the observation rod 61 in the observation groove 521, the operator can intuitively judge the degree of advancement of the push bolt 7, thereby avoiding excessive compression or damage to the clamping elastic pad 6 due to excessive tightening of the push bolt 7.

[0036] During the adjustment of the push bolt 7, the operator simultaneously observes the position change of the observation rod 61 in the observation groove 521. When the push bolt 7 is tightened to push it towards the clamping elastic pad 6, the observation rod 61 moves outward in the observation groove 521. Once the observation rod 61 moves to the edge of the observation groove 521, it indicates that the push bolt 7 has reached its maximum allowable adjustment stroke. At this point, the tightening operation should be stopped to prevent further pushing and damage to the clamping elastic pad 6.

[0037] The implementation principle of a vertical screw scale according to an embodiment of this application is as follows: When the driving device pushes the connecting frame 4 to rotate around its hinge point, causing the mounting frame 5 to press the clamping elastic pad 6 against the opening of the packaging bag on the discharge pipe 3, the clamping elastic pad 6 undergoes elastic deformation and presses the opening of the bag onto the discharge pipe 3; at this time, the clamping force on different parts of the clamping elastic pad 6 can be pre-adjusted or finely adjusted in real time by multiple pushing bolts 7 on the crossbar 51, and the observation rod 61 fixed on the clamping elastic pad 6 will move synchronously in the observation groove 521 of the clamping plate 52 with the adjustment of the bolts, providing visual reference for the operator, thereby preventing the pushing bolts 7 from being over-screwed.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vertical screw scale, characterized in that: The machine includes a frame, a clamping frame, and a discharge pipe. The clamping frame includes a connecting frame, a mounting frame, and a clamping elastic pad, wherein: The top end of the connecting frame is rotatably hinged to the frame; the mounting bracket is located at the bottom end of the connecting frame, and a mounting groove is provided on one side of the mounting bracket; the clamping elastic pad is placed in the mounting groove and extends out of the mounting groove.

2. A vertical screw scale according to claim 1, characterized in that: The mounting frame includes a crossbar and clamping plates. The crossbar is located at the bottom of the connecting frame, and the clamping plates are provided in pairs. The pair of clamping plates clamp the crossbar and cooperate with the crossbar to form the mounting groove.

3. A vertical screw scale according to claim 2, characterized in that: The crossbar includes a positioning rod and a clamping rod, wherein the positioning rod is provided in pairs, and the pair of positioning rods are respectively located at both ends of the clamping rod, and the positioning rod is located on the connecting frame.

4. A vertical screw scale according to claim 3, characterized in that: The clamping rod is arranged in an arc shape.

5. A vertical screw scale according to claim 2, characterized in that: A push bolt is threaded onto the crossbar, and the push bolt contacts the clamping elastic pad.

6. A vertical screw scale according to claim 5, characterized in that: Multiple push bolts are provided along the length of the crossbar.

7. A vertical screw scale according to claim 6, characterized in that: The clamping plate is provided with an observation groove, and the clamping elastic pad is provided with an observation rod, which is located through the observation groove.

8. A vertical screw scale according to claim 7, characterized in that: The observation rod is attached to the clamping elastic pad near the end of the push bolt.

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