Raw rubber plastication equipment

Abstract

The utility model provides raw rubber plastication equipment, and belongs to the technical field of plastication equipment. Comprising a mounting cylinder, a rotating cylinder is rotationally embedded in the mounting cylinder, a plastifying cavity is formed in the center of the rotating cylinder, plastifying rollers are symmetrically and rotationally arranged at the positions, corresponding to the plastifying cavity, of the mounting cylinder, and bearing cavities are symmetrically formed in the positions, corresponding to the plastifying cavity, of the rotating cylinder; the position, corresponding to the bearing cavity, of the outer side edge of the rotating cylinder is covered with a baffle, the edge of the baffle is fixed to the rotating cylinder through multiple sets of positioning bolts, blocking cavities are symmetrically formed in the inner side edge of the plastifying cavity, blocking assemblies are installed at the blocking cavities, and a transmission gear ring is installed on the outer side edge of the rotating cylinder in an embedded mode. And a transmission assembly for driving the transmission gear ring to rotate is mounted on the mounting cylinder. According to the utility model, the loading and unloading structure is used for receiving raw materials and overturning instead of manual guarding, so that the overall automation of rubber mixing can be ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plasticizing equipment, in particular to a plasticizing equipment for raw rubber materials. Background Art

[0002] Rubber is widely used in our daily life. Rubber needs to be plasticized during processing. Plasticization refers to the process of changing the properties of raw materials through mechanical destruction, improving the plasticity of rubber, improving the fluidity of rubber and increasing the adhesion of rubber. Rubber mixing on a mixing mill refers to the process of mixing, plasticizing and calendering rubber using a mixing mill. A mixing mill usually consists of two parallel, relatively rotating rollers. By adjusting the gap and speed between the rollers, rubber mixing, calendering and sheeting can be achieved.

[0003] The existing rubber raw material plasticizing equipment, when plasticating the rubber through an open mixing mill, mostly adopts manual labor to take over the plasticized rubber and put it onto the plasticizing roller again, so as to realize the overall plasticizing process of the rubber. During operation, manual labor is required to frequently take the rubber raw material and place it on the plasticizing roller. The overall operation is relatively cumbersome. Therefore, the present application provides a rubber raw material plasticizing equipment to meet the demand. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a rubber raw material raw rubber plasticizing equipment to solve the problem that the existing rubber raw material raw rubber plasticizing equipment, when plasticating the rubber through an open mixing mill, mostly adopts manual labor to take over the plasticized rubber and put it onto the plasticizing roller again, so as to realize the overall plasticizing treatment of the rubber. During operation, manual labor is required to frequently take over the rubber raw materials and place them on the top of the plasticizing roller, and the overall operation is relatively cumbersome.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A rubber raw material plasticizing equipment comprises a mounting cylinder, a rotating cylinder is rotatably embedded and installed inside the mounting cylinder, a plasticizing chamber is provided at the center of the rotating cylinder, a plasticizing roller is symmetrically rotatably provided at the mounting cylinder corresponding to the plasticizing chamber, a receiving chamber is symmetrically provided at the rotating cylinder corresponding to the position of the plasticizing chamber, a baffle is covered on the outer side of the rotating cylinder corresponding to the receiving chamber, the edge of the baffle is fixed to the rotating cylinder by multiple sets of positioning bolts, a blocking chamber is symmetrically provided on the inner side of the plasticizing chamber, a blocking assembly is installed at the blocking chamber, a transmission gear ring is embedded and installed on the outer side of the rotating cylinder, and a transmission assembly for driving the transmission gear ring to rotate is installed on the mounting cylinder.

[0007] Optionally, the blocking assembly includes a transmission gear rotatably embedded in the blocking cavity, a blocking plate is slidably arranged in the blocking cavity, the top of the blocking plate is meshed with the outer edge of the transmission gear, and a sealed motor is installed inside the rotating cylinder to drive the transmission gear to rotate.

[0008] Optionally, the transmission assembly includes a transmission motor installed on a mounting tube, a bevel gear is installed at the front end of the shaft of the transmission motor, a transmission member is rotatably arranged inside the mounting tube, and the transmission member is respectively meshed with the transmission gear ring and the bevel gear for transmission.

[0009] Optionally, the transmission member includes a bevel gear and a meshing gear, the bevel gear and the meshing gear are connected and fixed via a connecting column, the bevel gear is meshed with the bevel gear, and the meshing gear is meshed with the transmission gear ring.

[0010] Optionally, a feed port is provided at the top of the installation barrel, a slag discharge port is provided at the bottom of the installation barrel, and a base frame for auxiliary installation barrel support is installed at the bottom of the installation barrel.

[0011] Optionally, sliding cavities are opened on the side edges of both ends of the mounting cylinder, sliding blocks are symmetrically slidably arranged in the sliding cavities, both ends of the plasticizing roller are rotatably arranged on the sliding blocks, and an adjustment cavity is opened vertically below the mounting cylinder corresponding to the sliding cavity, and an adjustment component for assisting in adjusting the position of the sliding block is installed in the adjustment cavity.

[0012] Optionally, the adjustment component includes a rotating rod rotatably arranged in the adjustment cavity, a slider is mounted on the rotating rod, the rotating rod and the slider are threadedly engaged, a support rod is hingedly installed between the slider and the sliding block, and an adjustment motor for assisting the rotation of the rotating rod is installed on the mounting tube.

[0013] Optionally, a limit strip is symmetrically protruding in the sliding cavity, and a limit groove for the limit strip to slide is symmetrically opened on the sliding block, and the limit groove and the limit strip slide in cooperation with each other.

[0014] Optionally, a rotating motor is installed on each of the two sliding blocks at one end, and a front end of a shaft of the rotating motor is fixed to one end of the plasticating roller.

[0015] Optionally, a scale plate is horizontally embedded and installed on the mounting cylinder corresponding to the upper side of the sliding cavity, scale lines are engraved on the scale plate, a pointer is protrudingly provided on the sliding block, and the scale plate and the pointer cooperate to read the numbers.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] In the above scheme, the natural rubber raw material is placed on the top of the plasticating roller by means of the cooperation between the rotating cylinder rotatably arranged inside the mounting cylinder and the receiving cavity and blocking component, as well as the transmission component and the transmission gear ring, etc. At this time, the baffle is closed and kept in a closed state, and the rotating motor is started. When the rotating motor rotates, it drives the two plasticating rollers to rotate in opposite directions, so that the plasticating rollers assist in plasticizing the natural rubber raw material. At this time, the receiving cavity at the bottom is in an open state, and the raw materials plasticized by the plasticating rollers are accumulated in the receiving cavity below. When the weight on the baffle at the bottom does not change, the sealing motor is started at this time, and the sealing motor drives the transmission gear to rotate, and the transmission gear and the blocking plate are meshed for transmission, so that the blocking plate is extended as a whole. Out, and then the receiving chamber is auxiliary sealed through two blocking plates, the transmission motor is started, the transmission motor drives the bevel gear to rotate, the bevel gear and the bevel gear on the transmission member are meshed and transmitted, so that the transmission member rotates as a whole, and at the same time the transmission ring gear is meshed and transmitted with the meshing gear, so that the transmission ring gear is rotated as a whole, and then the rotating drum is driven to rotate and flip. When the rotating drum rotates and flips 180 degrees, the sealing motor drives the transmission gear to rotate, and the transmission gear and the blocking plate are meshed and transmitted, so that the blocking plate is extended and retracted as a whole. At this time, the raw materials blocked by the blocking plate in the receiving chamber fall and fall between the two plasticizing rollers. The loading and unloading structure receives the raw materials and flips them instead of manual supervision, which can ensure the overall automation of rubber mixing and improve production efficiency.

[0018] Through the cooperation between the set sliding blocks and adjusting components, the two plasticizing rollers can be conveniently adjusted to the predetermined positions according to work requirements before work, thereby facilitating the subsequent rubber mixing process and adapting to various work requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the present invention and enable those skilled in the relevant art to make and use the present invention.

[0020] Figure 1 This is a three-dimensional structural diagram of the rubber raw material plasticizing equipment;

[0021] Figure 2 It is a longitudinal cross-sectional view of a rubber raw material plasticizing equipment;

[0022] Figure 3 Rubber raw material plasticizing equipment Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the transmission parts of the rubber raw material plasticizing equipment.

[0024] Reference numerals

[0025] 1. Mounting cylinder; 2. Rotating cylinder; 21. Baffle; 22. Positioning bolt; 3. Base frame; 4. Transmission assembly; 5. Transmission gear ring; 6. Transmission member; 7. Bevel gear; 8. Meshing gear; 9. Transmission motor; 10. Plasticizing chamber; 11. Receiving chamber; 12. Blocking assembly; 13. Blocking plate; 14. Transmission gear; 15. Plasticizing roller; 151. Rotating motor; 16. Sliding block; 17. Adjustment assembly; 171. Rotating rod; 172. Sliding block; 173. Support rod; 174. Adjustment motor; 18. Scale plate; 19. Pointer.

[0026] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0027] The following is a detailed description of a rubber raw material plasticizing equipment provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0028] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0029] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0030] It is to be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0031] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0032] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a raw rubber plasticizing equipment, including a mounting cylinder 1, a rotating cylinder 2 is rotatably embedded and installed inside the mounting cylinder 1, a plasticizing chamber 10 is provided at the center of the rotating cylinder 2, a plasticizing roller 15 is symmetrically rotatably provided at the mounting cylinder 1 corresponding to the plasticizing chamber 10, sliding chambers are provided on both ends of the side edges of the mounting cylinder 1, and sliding blocks 16 are symmetrically slidably provided in the sliding chambers. When working, a scraper can be provided under the plastic roller to ensure that the rubber adhered to the plasticizing roller 15 can be stably scraped off, and both ends of the scraper are fixed to the sliding block 16 through a connecting rod, and both ends of the plasticizing roller 15 are rotatably provided on the sliding block 1 6, two sliding blocks 16 at one end are both equipped with a rotating motor 151, the front end of the machine shaft of the rotating motor 151 is fixed to one end of the plasticating roller 15, and an adjusting cavity is vertically opened below the corresponding sliding cavity on the mounting cylinder 1, and an adjusting component 17 for assisting the position adjustment of the sliding block 16 is installed in the adjusting cavity. The adjusting component 17 includes a rotating rod 171 rotatably arranged in the adjusting cavity, a sliding block 172 is sleeved and installed on the rotating rod 171, the rotating rod 171 and the sliding block 172 are threadedly matched, a support rod 173 is hingedly installed between the sliding block 172 and the sliding block 16, and an adjusting motor 174 for assisting the rotation of the rotating rod 171 is installed on the mounting cylinder 1.

[0033] Through the cooperation between the set sliding block 16 and the adjusting component 17, the adjusting motor 174 drives the rotating rod 171 to rotate as a whole, and the rotating rod 171 and the slider 172 are threadedly matched, so that the slider 172 moves as a whole. During the adjustment of the slider 172, the support rod 173 is pulled, so that the support rod 173 pulls the sliding block 16 to move as a whole, and adjusts the overall position of the sliding block 16. Before work, the two plasticizing rollers 15 can be conveniently adjusted to the predetermined position according to work requirements, thereby facilitating the subsequent rubber mixing process and adapting to various work requirements.

[0034] The above-mentioned sliding cavity is symmetrically provided with limit strips, and the sliding block 16 is symmetrically provided with limit grooves for the limit strips to slide. The limit grooves and the limit strips cooperate with each other to slide. Through the cooperation between the limit grooves and the limit strips, it can be ensured that the sliding block 16 can only be slidably set in the sliding cavity.

[0035] A scale plate 18 is horizontally embedded above the corresponding sliding cavity on the mounting cylinder 1, and scale lines are engraved on the scale plate 18. A pointer 19 is protrudingly provided on the sliding block 16. The scale plate 18 and the pointer 19 cooperate to read the readings. Through the cooperation between the scale plate 18 and the pointer 19, the overall position of the sliding block 16 after adjustment can be effectively determined during operation.

[0036] like Figure 1-Figure 4 As shown, the rotating cylinder 2 is symmetrically provided with a receiving cavity 11 at the position corresponding to the plasticizing cavity 10, and a baffle 21 is provided on the outer side of the rotating cylinder 2 to cover the receiving cavity 11, and a weight sensor is installed in the baffle 21. The model of the weight sensor is German HBM Z6FC3, which can be used but not limited to this model. The edge of the baffle 21 is fixed to the rotating cylinder 2 by multiple sets of positioning bolts 22, and a blocking cavity is symmetrically provided on the inner side of the plasticizing cavity 10, and a blocking assembly 12 is installed at the blocking cavity. A transmission gear ring 5 is embedded and installed on the outer side of the rotating cylinder 2, and a transmission assembly 4 for driving the transmission gear ring 5 to rotate is installed on the mounting cylinder 1. The transmission assembly 4 includes a transmission motor 9 installed on the mounting cylinder 1, and a bevel gear is installed at the front end of the shaft of the transmission motor 9. A transmission member 6 is rotatably arranged inside the mounting cylinder 1, and the transmission member 6 includes a bevel gear 7 and a meshing gear 8. The bevel gear 7 and the meshing gear 8 are connected and fixed by a connecting column, and the bevel gear 7 is meshed with the bevel gear, and the meshing gear 8 is meshed with the transmission gear ring 5.

[0037] The natural rubber raw material is placed on the top of the plasticating roller 15 by means of the cooperation between the rotating cylinder 2 rotatably arranged inside the mounting cylinder 1, the receiving cavity 11 and the blocking component 12 arranged thereon, as well as the transmission component 4 and the transmission gear ring 5. At this time, the baffle 21 is closed and kept in a closed state, and the rotating motor 151 is started. When the rotating motor 151 rotates, it drives the two plasticating rollers 15 to rotate in opposite directions, so that the plasticating rollers 15 assist in plasticizing the natural rubber raw material. At this time, the receiving cavity 11 at the bottom is in an open state, and the raw materials plasticized by the plasticating rollers 15 are accumulated in the receiving cavity 11 below. When the weight on the baffle 21 at the bottom does not change, the sealing motor is started at this time, and the sealing motor drives the transmission gear 14 to rotate, and the transmission gear 14 is meshed with the blocking plate 13 for transmission, so that the blocking plate 13 is integrated. The body extends out, and then the receiving chamber 11 is auxiliary sealed through two blocking plates 13, and the transmission motor 9 is started. The transmission motor 9 drives the bevel gear to rotate, and the bevel gear and the bevel gear 7 on the transmission member 6 are meshed and transmitted, so that the transmission member 6 rotates as a whole. At the same time, the transmission gear ring 5 and the meshing gear 8 are meshed and transmitted, so that the transmission gear ring 5 rotates as a whole, and then drives the rotating cylinder 2 to rotate and flip. When the rotating cylinder 2 rotates and flips 180 degrees, the sealing motor drives the transmission gear 14 to rotate, and the transmission gear 14 and the blocking plate 13 are meshed and transmitted, so that the blocking plate 13 is extended and retracted as a whole. At this time, the raw materials blocked by the blocking plate 13 in the receiving chamber 11 fall and fall between the two plasticizing rollers 15. The loading and unloading structure receives the raw materials and flips them instead of manual supervision, which can ensure the overall automation of rubber mixing and improve production efficiency.

[0038] A feed port is provided at the top of the installation cylinder 1, a slag discharge port is provided at the bottom of the installation cylinder 1, and a base frame 3 for supporting the auxiliary installation cylinder 1 is installed at the bottom of the installation cylinder 1. Through the provided feed port and slag discharge port, the inside of the installation cylinder 1 can be effectively cleaned conveniently after the work is completed.

[0039] The working principle of the technical solution provided by the utility model is as follows:

[0040] Before work, start the adjustment motor 174, which drives the rotating rod 171 to rotate as a whole. The rotating rod 171 and the slider 172 are threadedly matched, so that the slider 172 moves as a whole. During the adjustment of the slider 172, the support rod 173 is pulled, so that the support rod 173 pulls the sliding block 16 to move as a whole, and the overall position of the sliding block 16 is adjusted.

[0041] During operation, when it is necessary to plasticize the rubber raw materials, open the top baffle 21 and put the natural rubber raw materials into the top of the plasticizing roller 15. At this time, close the baffle 21 and keep it in a closed state, start the rotating motor 151, and when the rotating motor 151 rotates, it drives the two plasticizing rollers 15 to rotate in opposite directions, so that the plasticizing rollers 15 assist in plasticizing the natural rubber raw materials. At this time, the receiving chamber 11 at the bottom is in an open state, and the raw materials plasticized by the plasticizing rollers 15 are accumulated in the receiving chamber 11 below. When the weight on the baffle 21 at the bottom does not change, start the sealing motor at this time, and the sealing motor drives the transmission gear 14 to rotate, and the transmission gear 14 is meshed with the blocking plate 13 for transmission, so that the blocking plate 13 is extended as a whole, and then the receiving chamber 11 is assisted in sealing by the two blocking plates 13.

[0042] At this time, the transmission motor 9 is started, and the transmission motor 9 drives the bevel gear to rotate. The bevel gear and the bevel gear 7 on the transmission member 6 are meshed and transmitted, so that the transmission member 6 rotates as a whole. At the same time, the transmission gear ring 5 and the meshing gear 8 are meshed and transmitted, so that the transmission gear ring 5 rotates as a whole, and then drives the rotating cylinder 2 to rotate and flip. When the rotating cylinder 2 rotates and flips 180 degrees, the sealing motor drives the transmission gear 14 to rotate, and the transmission gear 14 and the blocking plate 13 are meshed and transmitted, so that the blocking plate 13 is extended and retracted as a whole. At this time, the raw material blocked by the blocking plate 13 in the receiving chamber 11 falls and falls between the two plasticizing rollers 15, and the plasticizing process is continued. How to reciprocate, when adding auxiliary agents, the baffle 21 can be opened during the falling process of the raw materials for addition.

[0043] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rubber raw material plasticizing equipment, characterized in that: It includes an installation cylinder, a rotating cylinder is rotatably embedded and installed inside the installation cylinder, a plasticizing chamber is opened at the center of the rotating cylinder, a plasticizing roller is symmetrically rotatably arranged at the installation cylinder corresponding to the plasticizing chamber, a receiving chamber is symmetrically opened at the rotating cylinder corresponding to the position of the plasticizing chamber, a baffle is covered on the outer side of the rotating cylinder corresponding to the receiving chamber, the edge of the baffle is fixed to the rotating cylinder by multiple sets of positioning bolts, a blocking chamber is symmetrically opened on the inner side of the plasticizing chamber, a blocking assembly is installed at the blocking chamber, a transmission gear ring is embedded and installed on the outer side of the rotating cylinder, and a transmission assembly for driving the transmission gear ring to rotate is installed on the installation cylinder.

2. The rubber raw material plasticizing equipment according to claim 1, characterized in that: The blocking assembly includes a transmission gear rotatably embedded in the blocking cavity, a blocking plate is slidably arranged in the blocking cavity, the top of the blocking plate is meshed with the outer edge of the transmission gear, and a sealed motor is installed inside the rotating cylinder to drive the transmission gear to rotate.

3. The rubber raw material plasticizing equipment according to claim 1, characterized in that: The transmission assembly includes a transmission motor installed on a mounting tube, a bevel gear is installed at the front end of the shaft of the transmission motor, a transmission member is rotatably arranged inside the mounting tube, and the transmission member is meshed with the transmission gear ring and the bevel gear for transmission respectively.

4. The rubber raw material plasticizing equipment according to claim 3, characterized in that: The transmission member comprises a bevel gear and a meshing gear, wherein the bevel gear and the meshing gear are connected and fixed via a connecting column, the bevel gear is meshed with the bevel gear, and the meshing gear is meshed with the transmission gear ring.

5. The rubber raw material plasticizing equipment according to claim 1, characterized in that: A feed port is provided at the top of the installation tube, a slag discharge port is provided at the bottom of the installation tube, and a base frame for auxiliary installation tube support is installed at the bottom of the installation tube.

6. The rubber raw material plasticizing equipment according to claim 1, characterized in that: Sliding cavities are provided on the sides of both ends of the installation cylinder, and sliding blocks are symmetrically slidably arranged in the sliding cavities. Both ends of the plasticizing roller are rotatably arranged on the sliding blocks. An adjustment cavity is vertically provided below the corresponding sliding cavity on the installation cylinder, and an adjustment component for assisting the position adjustment of the sliding block is installed in the adjustment cavity.

7. The rubber raw material plasticizing equipment according to claim 6, characterized in that: The adjustment component includes a rotating rod rotatably arranged in the adjustment cavity, a sliding block is sleeved on the rotating rod, the rotating rod and the sliding block are threadedly matched, a support rod is hingedly installed between the sliding block and the sliding block, and an adjustment motor for assisting the rotation of the rotating rod is installed on the installation cylinder.

8. The rubber raw material plasticizing equipment according to claim 6, characterized in that: The sliding cavity is symmetrically provided with a limit strip protruding therein, and the sliding block is symmetrically provided with a limit slot for the limit strip to slide therein, and the limit slot and the limit strip slide in cooperation with each other.

9. The rubber raw material plasticizing equipment according to claim 6, characterized in that: A rotating motor is installed on the two sliding blocks at one end, and the front end of the shaft of the rotating motor is fixed on one end of the plasticating roller.

10. The rubber raw material plasticizing equipment according to claim 9, characterized in that: A scale plate is horizontally embedded and installed on the installation cylinder corresponding to the upper side of the sliding cavity, and scale lines are engraved on the scale plate. A pointer is protrudingly provided on the sliding block, and the scale plate and the pointer cooperate to read the numbers.

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