Single and twin screw feeding device for loss-in-weight scale and loss-in-weight scale

Abstract

The application discloses a single-double screw feeding device for a loss-in-weight scale and a loss-in-weight scale, wherein the feeding device comprises a feeding motor, a feeding screw, a feeding pipe, a transmission box and a transmission mechanism; the feeding motor is fixed at one end of the transmission box, and the other end of the transmission box is rotationally connected with one end of the feeding pipe; the transmission mechanism comprises an input shaft, a transmission assembly and an output shaft; the other end of the transmission box is provided with a locking portion, and one end of the feeding pipe is provided with a first locking hole and a second locking hole; when the locking portion is connected with the first locking hole, the two output shafts are arranged in a vertical state, and the feeding screw is installed on any output shaft; when the locking portion is connected with the second locking hole, the two output shafts are arranged in a horizontal state, and the two feeding screws are respectively installed on the two output shafts; one feeding screw or two feeding screws can be connected according to actual requirements, and the single-double screw universal feeding device is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material processing, in particular to a single / double screw feeding device for a loss-in-weight scale and a loss-in-weight scale. BACKGROUND

[0002] The loss-in-weight scale is a kind of weighing equipment with intermittent feeding and continuous discharging. Since the loss control is carried out in the hopper, it can achieve high control accuracy, and the structure is easy to seal, so it is a great improvement compared with the screw scale in powder control. It is suitable for controlling and batching of fine materials such as plastics.

[0003] The existing loss-in-weight scale is fed by a single screw feeding device or a double screw feeding device. The single screw feeding device and the double screw feeding device are fixed on the loss-in-weight scale, and they cannot be interchangeable. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a single / double screw feeding device for a loss-in-weight scale. The single / double screw of the feeding device can be interchangeable, and only single screw feeding or double screw feeding can be used.

[0005] Further, the present application also provides a loss-in-weight scale based on the above-mentioned feeding device.

[0006] The technical scheme adopted by the present application is as follows:

[0007] The single / double screw feeding device for a loss-in-weight scale comprises a feeding motor, a feeding screw and a feeding pipe. One end of the feeding pipe is provided with a feeding groove for connecting with a hopper, and the other end is provided with a discharge port. The feeding screw is arranged in the feeding pipe, one end of which is connected with the feeding motor, and the other end penetrates through the feeding pipe and extends into the discharge port.

[0008] It also comprises a transmission box and a transmission mechanism. The feeding motor is fixed on one end of the transmission box, and the other end of the transmission box is rotatably connected with one end of the feeding pipe. The transmission mechanism comprises an input shaft, a transmission assembly and an output shaft. One end of the input shaft extends out of the transmission box and is connected with the feeding motor, and the other end is connected with the input end of the transmission assembly. The output shaft is two independent shafts, one end of each of which is connected with the transmission assembly. The feeding screw is one or two, which can be detachably installed on the other end of the output shaft.

[0009] The other end of the transmission box is provided with a locking part, and one end of the feeding pipe is provided with a first locking hole and a second locking hole; when the locking part is connected with the first locking hole, the two output shafts are vertically arranged, and the feeding screw is one, which is detachably installed on any output shaft; when the locking part is connected with the second locking hole, the two output shafts are horizontally arranged, and the feeding screw is two, which are respectively detachably installed on the two output shafts.

[0010] Further, the transmission assembly comprises a first gear and a second gear, the other end of the input shaft is connected with the first gear, the first gear is provided with internal teeth, and the second gear is two, both of which are provided with external teeth and are respectively engaged with the internal teeth of the first gear, and the two output shafts are respectively connected with the corresponding second gears.

[0011] Further, a fixed frame is further included, the upper part of the fixed frame is provided with a fixed part for being connected with the hopper, and one end of the transmission box is rotatably installed at the lower part of the fixed frame.

[0012] Further, the lower part of the fixed frame is provided with a mounting hole, one end of the transmission box is inserted into the mounting hole and installed in the mounting hole through a first bearing.

[0013] Further, the other end of the transmission box is inserted into one end of the feeding pipe and installed at the other end of the feeding pipe through a second bearing.

[0014] Further, the transmission box comprises a first transmission section and a second transmission section, the first transmission section is detachably connected with the second transmission section, the transmission assembly is installed in the first transmission section, and the output shaft is installed in the second transmission section.

[0015] Further, the output shaft is installed in the second transmission section through a third bearing.

[0016] Further, the locking part is a lug fixedly arranged at the outer wall of the other end of the transmission box, the first locking hole and the second locking hole are arranged at the end face of one end of the feeding pipe, and the lug is connected with the first locking hole or the second locking hole through a fastener.

[0017] Further, the application further provides a loss weight scale, which comprises a hopper, a base, a feeding box and a feeding device, the feeding box is installed between the base and the hopper, and the feeding device adopts the single / double screw feeding device for the loss weight scale, the feeding device is arranged in the feeding box, and the other end of the feeding pipe of the feeding device is arranged outside the feeding box, and the feeding groove is fixed at the bottom of the hopper in a hanging manner.

[0018] Further, a support frame is further included, the lower end of the support frame is fixed on the base, and the upper end of the support frame is fixed at the bottom of the hopper.

[0019] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the accompanying drawings or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or prior art. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0021] Figure 1 The schematic structural diagram of the single-double screw feeding device for the loss-in-weight scale provided in Embodiment 1 of the present application is shown in Figure 1.

[0022] Figure 2 The enlarged view of part A of Figure 1 is shown in Figure 2. Figure 1

[0023] Figure 3 The schematic structural diagram of the double-screw state of the single-double screw feeding device for the loss-in-weight scale provided in Embodiment 1 of the present application is shown in Figure 3.

[0024] Figure 4 The schematic structural diagram of the connection between the transmission case and the feeding pipe provided in Embodiment 1 of the present application is shown in Figure 4.

[0025] Figure 5 The schematic structural diagram of the loss-in-weight scale provided in Embodiment 2 of the present application is shown in Figure 5.

[0026] In the drawings, 100 is the feeding device, 200 is the hopper, 300 is the discharge port, 400 is the support frame, 500 is the feeding case, 600 is the base, 1 is the feeding pipe, 2 is the feeding groove, 3 is the feeding screw, 4 is the feeding motor, 5 is the input shaft, 61 is the first transmission section, 62 is the second transmission section, 7 is the first bearing, 8 is the second bearing, 9 is the fixing frame, 10 is the first gear, 11 is the second gear, 12 is the output shaft, 13 is the third bearing, 14 is the transmission cavity, 15 is the locking part, 16 is the second locking hole, and 17 is the first locking hole. DETAILED DESCRIPTION

[0027] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the skilled person in the field of the present application.

[0029] Embodiment 1 ​

[0030] Referring to Figures 1-4 The application discloses a single-double screw feeding device 100 for a loss-in-weight scale, which comprises a feeding motor 4, a feeding screw 3 and a feeding pipe 1, one end top of the feeding pipe 1 is provided with a feeding groove 2 for being connected with a hopper 200, and the other end is provided with a discharge port 300; the feeding screw 3 is arranged in the feeding pipe 1, one end of the feeding screw 3 is connected with the feeding motor 4, and the other end penetrates through the feeding pipe 1 and extends into the discharge port 300.

[0031] The application further comprises a transmission box and a transmission mechanism, the feeding motor 4 is fixed at one end of the transmission box, and the other end of the transmission box is rotationally connected with one end of the feeding pipe 1; the transmission mechanism comprises an input shaft 5, a transmission assembly and an output shaft 12; one end of the input shaft 5 extends out of the transmission box and is connected with the feeding motor 4, and the other end is connected with an input end of the transmission assembly; the output shaft 12 is composed of two independent output shafts, and one end of each of the two output shafts 12 is connected with the transmission assembly; the feeding screw 3 is composed of one or two feeding screws, and the feeding screw 3 is detachably arranged at the other end of the output shaft 12.

[0032] The other end of the transmission box is provided with a locking portion 15, and one end of the feeding pipe 1 is provided with a first locking hole 17 and a second locking hole 16; when the locking portion 15 is connected with the first locking hole 17, the two output shafts 12 are arranged in a vertical state, the feeding screw 3 is composed of one feeding screw, and the feeding screw 3 is detachably arranged on any one of the output shafts 12; when the locking portion 15 is connected with the second locking hole 16, the two output shafts 12 are arranged in a horizontal state, the feeding screw 3 is composed of two feeding screws, and the two feeding screws 3 are respectively detachably arranged on the two output shafts 12.

[0033] In use, after materials enter the hopper 200, the materials enter the feeding device 100 through the feeding groove 2 under the action of a stirring device, and the materials entering the feeding device 100 are conveyed to the discharge port 300 under the action of the feeding screw 3 and then discharged.

[0034] According to the application, the output shaft 12 of the transmission mechanism is arranged in two independent output shafts, each of the output shafts 12 is detachably connected with the feeding screw 3, in use, one feeding screw 3 or two feeding screws 3 can be connected according to actual requirements, and the single-double screw universal function of the same feeding device 100 is realized.

[0035] Specifically, since the transmission box is rotationally connected with the feeding pipe 1, a locking portion 15 is arranged at the other end of the transmission box, and a first locking hole 17 and a second locking hole 16 are arranged at one end of the feeding pipe 1; when the single-screw feeding device 100 needs to be used, the transmission box is rotated, the locking portion 15 is rotated to the position of the first locking hole 17, and the locking portion 15 is connected with the first locking hole 17, at this time, the two output shafts 12 are arranged in a vertical state, and the feeding screw 3 can be installed on only one output shaft 12, so that single-screw feeding is realized; when double-screw feeding needs to be used, the connection between the locking portion 15 and the first locking hole 17 is disconnected, the transmission box is rotated, the locking portion 15 is rotated to the position of the second locking hole 16, and the locking portion 15 is connected with the second locking hole 16, at this time, the two output shafts 12 are arranged in a horizontal state, and the feeding screw 3 can be installed on the two output shafts 12 respectively, so that double-screw feeding is realized.

[0036] Since the feeding motor 4 is installed on the transmission box, when the transmission box is rotated, the feeding motor 4 rotates with the transmission box, that is, in the present application, the feeding motor 4, the transmission box and the transmission mechanism can be rotated as a whole between the vertical state and the horizontal state.

[0037] The transmission assembly comprises a first gear 10 and a second gear 11, one end of the input shaft 5 is connected with the first gear 10, the first gear 10 is provided with internal teeth, the second gear 11 is two, both of the two second gears 11 are provided with external teeth and are respectively meshed with the internal teeth of the first gear 10, and the two output shafts 12 are respectively connected with the corresponding second gears 11.

[0038] The first gear 10 is an internal gear, which has an open end and a closed end, the input shaft 5 is fixed at the closed end of the first gear 10, and the input shaft 5 can be integrally formed with the first gear 10; the internal teeth are arranged along the inner circumference of the first gear 10, the second gear 11 is two, both of the two second gears 11 are arranged in the first gear 10 and are meshed with the first gear 10, and the two output shafts 12 are respectively installed on the two second gears 11.

[0039] The torque of the feeding motor 4 is transmitted to the first gear 10, the second gear 11 and then the output shaft 12 connected with the second gear 11 in sequence through the input shaft 5, and then transmitted to the feeding screw 3, so that material conveying is realized.

[0040] The two output shafts 12 are respectively meshed with the first gear 10 through the second gear 11, and can be synchronously rotated under the driving of the feeding motor 4.

[0041] The transmission box comprises a first transmission section 61 and a second transmission section 62, the first transmission section 61 and the second transmission section 62 are detachably connected, the transmission assembly is installed in the first transmission section 61, and the output shaft 12 is installed in the second transmission section 62.

[0042] One end of the first transmission section 61 is closed, and the other end is connected to one end of the second transmission section 62 through a bolt, and the other end of the second transmission section 62 is closed; the feeding motor 4 can be fixedly installed on the closed end face of the first transmission section 61 through a bolt, to realize synchronous rotation with the transmission box; the transmission mechanism is installed in the first transmission section 61, and the input shaft 5 of the transmission mechanism passes through the closed end of the first transmission section 61 and is connected with the feeding motor 4; the output shaft 12 of the transmission mechanism is installed in the second transmission section 62 through the third bearing 13, one end of which extends out of the second transmission section 62 and is connected with the second gear 11, and the other end passes through the closed end of the second transmission section 62 and is connected with the feeding screw 3.

[0043] Specifically, two independent transmission cavities 14 are arranged along the circumference of the second transmission section 62, and the two output shafts 12 are respectively installed in the transmission cavities 14 through the third bearings 13, that is, the third bearings 13 are arranged in pairs, and the third bearings 13 can be arranged in two pairs or three pairs in the axial direction of the output shaft 12. In the embodiment, the third bearings 13 are arranged in two pairs.

[0044] In order to improve the stability of the feeding device 100, a fixing frame 9 is further included, an upper part of the fixing frame 9 is provided with a fixing part for connecting with the hopper 200, and one end of the transmission box is rotatably installed at a lower part of the fixing frame 9.

[0045] Specifically, the lower part of the fixing frame 9 is provided with a mounting hole, one end of the transmission box is inserted into the mounting hole and installed in the mounting hole through the first bearing 7. The other end of the transmission box is inserted into one end of the feeding pipe 1 and installed at the other end of the feeding pipe 1 through the second bearing 8.

[0046] The locking part 15 is a supporting lug fixedly arranged on the outer wall of the other end of the transmission box, the first locking hole 17 and the second locking hole 16 are arranged on the end face of one end of the feeding pipe 1, and the supporting lug is connected with the first locking hole 17 or the second locking hole 16 through a fastener such as a screw.

[0047] Embodiment 2

[0048] Referring to Figure 5 In the embodiment, the application further provides a loss-in-weight scale, which comprises a hopper 200, a base 600, a feeding box 500 and a feeding device 100, the feeding box 500 is installed between the base 600 and the hopper 200, the feeding device 100 adopts the single-double screw feeding device 100 for a loss-in-weight scale as described in Embodiment 1, the feeding device 100 is arranged in the feeding box 500, and the other end of the feeding pipe 1 of the feeding device 100 extends out of the feeding box 500, and the feeding chute 2 is fixed in a suspended manner at the bottom of the hopper 200.

[0049] In order to further support the hopper 200 and improve the metering accuracy, a support frame 400 is further included, the lower end of the support frame 400 is fixed on the base 600, and the upper end is fixed on the bottom of the hopper 200.

[0050] The loss-in-weight scale adopts the feeding device 100 described in Embodiment 1, and in use, single screw or double screw can be used according to actual needs, and the universality of single screw and double screw is realized, and single screw and double screw can be conveniently converted.

[0051] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the specification of the present application, a large number of specific details are explained. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, systems and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0053] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, systems, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A single- or twin-screw feeding device for a loss-in-weight scale, comprising a feeding motor, a feeding screw, and a feeding tube, wherein one end of the feeding tube has a feeding trough for connection to a hopper, and the other end has a discharge port; the feeding screw is disposed inside the feeding tube, one end of which is connected to the feeding motor, and the other end passes through the feeding tube and extends into the discharge port; characterized in that, It also includes a transmission box and a transmission mechanism. The feeding motor is fixed to one end of the transmission box, and the other end of the transmission box is rotatably connected to one end of the feeding tube. The transmission mechanism includes an input shaft, a transmission assembly, and an output shaft. One end of the input shaft extends out of the transmission box and is connected to the feeding motor, and the other end is connected to the input end of the transmission assembly. There are two independent output shafts, and one end of each output shaft is connected to the transmission assembly. There are one or two feeding screws, and the feeding screws are detachably installed on the other end of the output shafts. The other end of the transmission box is provided with a locking part, and one end of the feeding tube is provided with a first locking hole and a second locking hole; when the locking part is connected to the first locking hole, the two output shafts are arranged vertically, and there is one feeding screw, which can be detachably installed on either output shaft; when the locking part is connected to the second locking hole, the two output shafts are arranged horizontally, and there are two feeding screws, which can be detachably installed on the two output shafts respectively. The locking part is a lug fixedly installed on the outer wall of the other end of the transmission box. The first locking hole and the second locking hole are opened on one end face of the feeding tube. The lug is connected to the first locking hole or the second locking hole by fasteners. The transmission assembly includes a first gear and a second gear. The other end of the input shaft is connected to the first gear. The first gear has internal teeth. There are two second gears, each with external teeth, which mesh with the internal teeth of the first gear. The two output shafts are connected to the corresponding second gears.

2. The single and twin screw feeding device for loss-in-weight weighing according to claim 1, characterized in that, It also includes a fixing frame, the upper part of which is provided with a fixing part for connecting with the hopper, and one end of the transmission box is rotatably mounted on the lower part of the fixing frame.

3. The single and twin screw feeding device for loss-in-weight weighing according to claim 2, characterized in that, The lower part of the fixed frame is provided with a mounting hole, and one end of the transmission box is inserted into the mounting hole and installed in the mounting hole through the first bearing.

4. The single and twin screw feeding device for loss-in-weight weighing according to claim 1, characterized in that, The other end of the transmission box is inserted into one end of the feeding tube and is mounted on the other end of the feeding tube via a second bearing.

5. The single and twin-screw feeding device for loss-in-weight weighing according to claim 1, characterized in that, The transmission box includes a first transmission section and a second transmission section, which are detachably connected. The transmission assembly is installed in the first transmission section, and the output shaft is installed in the second transmission section.

6. The single and twin-screw feeding device for loss-in-weight weighing according to claim 5, characterized in that, The output shaft is mounted in the second transmission section via a third bearing.

7. A loss-in-weight scale, comprising a hopper, a base, a feed box, and a feeding device, wherein the feed box is installed between the base and the hopper, characterized in that, The feeding device is a single or twin screw feeding device for loss-in-weight weighing as described in any one of claims 1 to 6. The feeding device is disposed inside the feeding box, and the other end of its feeding tube extends out of the feeding box. The feeding trough is fixed to the bottom of the hopper in a suspended manner.

8. The loss-in-weight scale according to claim 7, characterized in that, It also includes a support frame, the lower end of which is fixed to the base and the upper end of which is fixed to the bottom of the hopper.

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