Rail injection device for floating-rolling-method plastic straw mats

Abstract

The rail injection device comprises a hanging ball and a rail injection device, the hanging ball comprises a first limiting end and a second limiting end, one side of the second limiting end is connected with the first limiting end through a limiting rod, and an elastic connecting piece is arranged on the other side, opposite to the first limiting end, of the second limiting end; the rail injection device comprises a fixing support, an upper rail plate and a lower rail plate which are oppositely arranged up and down are installed on the fixing support, a front tongue plate is arranged at the front end of the rail plate, and a rear tongue plate is arranged at the rear end of the rail plate. The upper track plate and the lower track plate are each provided with a ridge-shaped protrusion in the axial direction, the ridge-shaped protrusions extend to the upper tongue plate and the lower tongue plate, and the two ridge-shaped protrusions are oppositely arranged to form a gap for the limiting rod to slide. The front tongue plate is provided with a rail slot for connecting a plastic straw mat rail; the device solves the problems that the constraint force of the hanging ball on the plastic cover is insufficient, the hanging ball derails and the hanging ball is difficult to enter the rail in the using process of the plastic cover hanging ball and the rail injection device.

Description

Technical Field

[0001] The utility model relates to the technical field of salt pan mechanical equipment, and particularly relates to an in-rail device for plastic covering by the floating-rolling method. Background Art

[0002] In the salt pan production activities in China, the plastic film covering (abbreviation: "plastic covering") technology is currently the main salt pan rain-proof technology. This technology mainly covers the crystallization pond liquid surface of the salt pan by releasing the covering during rainfall, preventing rainwater from entering the crystallization pond and diluting the salt liquid in the pond, so as to play a role in stabilizing the raw salt production and improving the salt production quality and efficiency. The method of retracting and releasing the plastic covering is the core of the plastic film covering technology, and there are mainly two methods: the pulling and squeezing method and the floating-rolling method. Among them, the floating-rolling method is the most widely used plastic covering retracting and releasing method at present due to its advantages such as convenient operation, fast plastic covering retracting and releasing speed, and few personnel occupied.

[0003] In order to enable the plastic covering to cover the crystallization pond liquid surface well, the current floating-rolling plastic covering retracting and releasing system mostly adopts a guide rail device. Hanging balls are fixed on both sides of the plastic covering of this system. When the plastic covering is released, the hanging balls enter the tracks fixed on both sides of the salt pan vertically through the in-rail device. Through the limiting effect of the hanging balls and the guide rails, the plastic covering is pulled to cover the entire pond surface. After the plastic covering is completely released, this structure also fixes the edge of the plastic covering to the edge of the salt pan, effectively resisting the influence of external forces such as wind on the plastic covering, and playing a role in keeping the covering state of the plastic covering stable.

[0004] However, limited by the special production environment of the salt pan and the slow development and lag of salt pan equipment over the years. At present, there are many reliability problems in the in-rail mechanism of the floating-rolling method.

[0005] The Chinese patent document with the publication number of CN205204844U discloses a plastic covering hanging ball in-rail device, and its in-rail device is only composed of two simple arc-shaped thin tongue plates. The tongue plates are fixed on the upper and lower sides of the track respectively in a vertically symmetrical manner to form a horn-shaped opening. The efficiency of guiding the hanging ball into the track of this structure is low. When in use, a certain length of the plastic covering must be manually guided into the track, and then the subsequent hanging balls can be automatically guided into the track under the traction of the plastic covering that has been guided into the track, which requires extra time and personnel. The reliability of this structure is not good. Due to the overly simple shape of the tongue plate itself, the guiding effect on the hanging ball is limited. At the same time, the tongue plate body is in a thin sheet structure with insufficient stiffness and is prone to force deformation, and partial hanging balls are prone to deviation and inability to enter the track during the use process.

[0006] The Chinese patent document with the publication number CN208327406U discloses a slideway system for the plastic covering track-in device in a salt pan. The hanging ball used in this system is a simple lollipop-shaped ball-rod structure. During use, the spherical part is located outside the track to play a limiting role, and the rod-shaped part extends from between the tracks to the other side and is connected to the edge of the plastic covering through a connecting line at the tail. During the use process, due to the relatively slender rod-shaped part, the connection between it and the spherical part is prone to breakage due to stress concentration. The limiting effect of the spherical limiting structure is not reliable enough. There is only unilateral limiting, and it can only maintain stability on the track under the traction of the plastic covering. Since the plastic covering film is stretched for a long time during use, it will cause its longitudinal elongation. At this time, it is easy to shift to one side during the retraction and release process. At this time, the hanging ball with only unilateral limiting cannot play a role in stabilizing the plastic covering. In addition, when the track deforms due to reasons such as thermal expansion and contraction, due to the weak constraint between this kind of hanging ear and the track, it is easy to get out of the track when subjected to external forces. The connection method between the hanging ear and the plastic covering through a connecting line is also prone to accidental situations such as the hanging ball getting knotted and the hanging ball head reversing, which affects the normal entry of the hanging ball into the track. The existence of these problems significantly affects the reliability of the plastic covering system and poses a hidden danger to the stable production of the salt pan.

[0007] Problem solving

[0008] The purpose of the present utility model is to provide an in-rail device for the plastic covering of the floating roll method, which solves the reliability problems such as insufficient binding force of the hanging ball on the plastic covering, derailment of the hanging ball, and difficulty in the hanging ball entering the track during the use of the current plastic covering hanging ball and the track-in device. Content of the utility model

[0009] In order to solve the above technical problems, the present utility model adopts the following technical solutions:

[0010] An in-rail device for the plastic covering of the floating roll method includes a hanging ball and a track-in device. The hanging ball includes a first limiting end and a second limiting end. One side of the second limiting end is connected to the first limiting end through a limiting rod. On the other side of the second limiting end opposite to the first limiting end, there is an elastic connecting piece for connecting with the plastic covering body.

[0011] The track-in device includes a fixed bracket. An upper track plate and a lower track plate are installed on the fixed bracket and are arranged opposite to each other up and down. The front end of the track plate is provided with a front tongue plate, and the rear end is provided with a rear tongue plate; an axial ridge-like protrusion is provided on each of the upper track plate and the lower track plate and extends to the upper and lower tongue plates. The two ridge-like protrusions are arranged opposite to each other to form a gap for the limiting rod to slide; the front tongue plate is provided with a track slot for connecting the plastic covering track.

[0012] Furthermore, the hanging ball is also provided with an accessory kit magnetic hanging ball sleeve, and the magnetic hanging ball sleeve is sleeved on the limiting end; a magnetic detector for automatic parking is provided on the plastic covering track.

[0013] Furthermore, the gap between the rear tongue plates gradually decreases from both sides towards the location of their ridge-like protrusions, and the gap on the side of the rear tongue plate close to the plastic sheeting body is larger than that on the side away from the plastic sheeting body.

[0014] Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0015] (1) The technical solution of the present utility model provides a rail entry device for a floating-rolling plastic sheeting, including a hanging ball and a rail entry device. The hanging ball includes a first limiting end and a second limiting end, so that the hanging ball has a limiting effect on both sides of the track, and the exertion of this limiting effect no longer relies on the traction force of the plastic sheeting. Whether the plastic sheeting undergoes longitudinal deformation after long-term use or offsets during the retraction and extension process, the hanging ball can play a role in stabilizing the retraction and extension operation of the plastic sheeting. At the same time, the mechanical limiting effect between the hanging ball and the plastic sheeting track is more firm, reducing the probability of the hanging ball slipping out of the track.

[0016] (2) In the technical solution of the present utility model, the hanging ball is connected to the plastic sheeting body using an elastic connector. This connector is more robust and has a certain anti-torsion effect. It can effectively support the hanging ball before it enters the rail entry device, which is beneficial to stabilizing the attitude of the hanging ball when entering the track. At the same time, it makes it difficult for the hanging balls to knot, thereby improving the success rate of the hanging ball entering the track.

[0017] (3) In the technical solution of the present utility model, a rail entry device with a ridge-like protrusion structure is adopted. This structure not only plays a role in limiting and guiding the hanging ball but also serves as a reinforcing rib for the track plate of the rail entry device, improving the mechanical strength of the track plate part, reducing the stress deformation of the track plate during the entry of the hanging ball, and reducing the probability of the hanging ear slipping out. When designing the track plate of the rail entry device, the manufacturability is considered, and an upper and lower two-piece combined plate-like structure is adopted. The structure is simple and can be mass-produced at low cost through injection molding and compression molding methods.

[0018] (4) In the technical solution of the present utility model, the structural design of the rear tongue plate of the rail entry device takes into account the stress state when the hanging ball enters the track and adopts an asymmetric design. It can utilize the traction force of the plastic sheeting and the gravity of the hanging ball itself to further enhance the guiding effect of the tongue plate on the hanging ear, further improving the success rate of the hanging ball entering the track. The front tongue plate is provided with a track slot, which can be directly compatible with the existing plastic sheeting track, further reducing the transformation and use costs.

[0019] (5) In the technical solution of the present invention, a magnetic detector and a magnetic hanging ball sleeve for automatic parking are added. The above components have a simple structure and are convenient to install. Using a non-contact detection method, each component is very easy to isolate from the environment by means such as sealing or coating with corrosion-resistant materials to adapt to a relatively harsh salt pan environment. After installation, it can enable automatic parking during the retraction and extension process of the plastic sheeting system, effectively improving the automation level of the plastic sheeting retraction and extension operation. Description of the Drawings

[0020] To more conveniently explain the structure and characteristics of the present utility model, the following drawings are provided:

[0021] Figure 1 It is a single-side schematic diagram of the working state of the rail entry device described in the present utility model.

[0022] Figure 2 It is a structural schematic diagram of the hanging ball.

[0023] Figure 3 It is a front view of the structure of the rail entry device.

[0024] Figure 4 It is a side view of the structure of the rail entry device.

[0025] Figure 5 It is a rear view of the structure of the rail entry device.

[0026] Figure 6 It is a structural and installation schematic diagram of the hanging ball sleeve

[0027] In the figure: 101 is the hanging ball, 102 is the rail entry device, 103 is the fixed bracket, 104 is the plastic covering body, 105 is the magnetic hanging ball sleeve, 106 is the magnetic detector, 107 is the plastic covering track, 108 is the plastic covering floating board, 109 is the towing rope, 110 is the salt pond surface, 201 is the first limiting end, 202 is the second limiting end, 203 is the limiting column, 204 is the elastic connecting piece, 301 is the upper track plate, 302 is the lower track plate, 303 is the front tongue plate, 304 is the rear tongue plate, 305 is the ridge protrusion, 306 is the track slot. Detailed implementation manners

[0028] To more clearly understand the purpose, technical features and effects of the present utility model, the following is a detailed description in conjunction with the drawings and embodiments.

[0029] The present utility model provides a rail entry device for plastic covering by the floating roll method, which consists of two parts: a hanging ball 101 and a rail entry device 102.

[0030] Referring to the drawings, the structure of the hanging ball 101 used in the rail entry device is as Figure 2As shown, the outer shapes of its first limiting end 201 and second limiting end 202 are ellipsoidal, and the limiting ends are connected by a columnar limiting post 203. The connection between the limiting post 203 and the limiting ends (201, 202) adopts a smooth transition to solve the stress concentration problem and reinforce the connection part to prevent the hanging ball 101 from breaking during use. An elastic connecting member 204 is installed on the side of the second limiting end 202 away from the first limiting end 201. It has a structure of a long strip-shaped thin sheet and is made of a fiber-reinforced elastic polymer, with a certain anti-torsion ability, so that the hanging ball is not prone to entanglement and reverse folding. The hanging ball limiting ends (201, 202) and the limiting post 203 are made of high molecular polymers such as PTFE, PVC or PE. When manufacturing the hanging ball 101, the elastic connecting member 204 is prefabricated first, and then the elastic connecting member 204 is integrally injection-molded with other parts of the hanging ball 101.

[0031] The structure of the orbiter (102) part of the device is as Figure 3 、 Figure 4 and Figure 5As shown in the figure, it is composed of two upper and lower parallel track plates (301, 302). Each track plate is provided with a ridge-like protrusion 305 along the central axis in the opposite direction. The existence of this structure makes the upper and lower track plates form a gap that just allows the hanging ball limit post 203 to pass through, enabling the rail inserter to have the functions of guiding and limiting the hanging ball 101. At the same time, this structure also plays a role similar to an axial stiffener, enhancing the bending resistance of the track plate. At the front end of the track plate, there are a front tongue plate 303 and a track slot 306, and at the rear end, there is a rear tongue plate 304. The front and rear tongue plates on the upper and lower track plates are both in a slope-shaped curved surface structure that is mirror-symmetrical and smoothly connected to the track plate, which plays a role in assisting the hanging ball 101 to enter the gap between the track plates (301, 302). The ridge-like protrusion 305 extends along the slope of each tongue plate (303, 304) towards the outside of the rail inserter, and gradually embeds into the groove formed by the hanging ball limit ends (201, 202) and the limit post 203 during the process of the hanging ball 101 sliding from the tongue plate (303, 304) to the track plate (301, 302), guiding the hanging ball 101 to enter the rail inserter 102 in the correct posture. To strengthen the auxiliary effect of the rear tongue plate 304 on the entry of the hanging ball 101 into the track, the rear tongue plate 304 adopts an asymmetric design. The side of the rear tongue plate 304 close to the plastic covering extends forward, which is beneficial to quickly support the hanging ball 101 during the entry of the plastic covering into the track. The gap formed between the two upper and lower rear tongue plates 304 is smaller on the side close to the plastic covering body 104 and larger on the side far from the plastic covering body 104, making the slope of the rear tongue plate 304 on the side far from the plastic covering body 104 greater than that on the side close to the plastic covering body (104). Utilizing the difference in slopes on both sides, the hanging ball 101 can more easily embed its groove into the ridge-like protrusion 305 under the action of its own gravity and the traction of the plastic covering body 104, ensuring that the hanging ball 101 smoothly enters the rail inserter 102. The body of the rail inserter 102 can be made of materials such as PE, PC, PVC, PTFE, and fiberglass. When manufacturing, it is preferably to use the one-piece injection molding method to separately manufacture the two upper and lower track plates 301, 302, or the track plate part except for the track slot 306 can be first pressed by the molding method, and then the track slot 306 is fixed to the front tongue plate 303 by means of gluing or hot melting, etc.

[0032] Figure 1 Figure shows a single-sided schematic diagram of the device in the working state. In actual use, the device is deployed on both sides, and the situation on the other side is the same as Figure 1It is mirror symmetric. When the device works, the in-rail devices 102 are fixed to each other through the supporting rib plates 102, and are fixed to the salt pond ground through the feet of the supporting rib plates 103. Its front end is connected to the plastic sheet covering track 107 through the track slot. The hanging ball 101 is engaged with the plastic sheet covering body 104 through the elastic connecting piece 204. A magnetic detector 106 is installed on the plastic sheet covering track at a certain distance from the front end of the in-rail device 102. This distance is determined by the actual situation on site and the plastic sheet covering system, as long as it meets the need for the plastic sheet covering system to stop safely. The form of the magnetic detector 106 is a reed switch or a magnetoresistive type, and the Hall type is preferably used. During daily use, part of the plastic sheet covering has been inserted into the track as shown in the figure, and the plastic sheet covering is held partially on the track by clamping the plastic sheet covering with the magnetic hanging ball sleeve 105 installed on the hanging ball 101, so as to save the operation of manually assisting in inserting a certain length of the plastic sheet covering into the in-rail device during in-rail insertion.

[0033] When the plastic sheet covering is inserted into the track, the head of the plastic sheet covering body 104 is supported by the plastic sheet covering floating plate 108 floating on the salt pond surface 110, and is pulled by the traction rope 109 under the action of the traction mechanism to slide along the arrow direction close to the pond surface. The moving plastic sheet covering body 104 drives the hanging ball 101 to enter the in-rail device 102 through the rear tongue plate 304, and slides into the plastic sheet covering track 107 through the front tongue plate 303 under the guiding action of the track plates (301, 302). After the hanging ball 101 enters the track, the groove formed by the hanging ball limiting ends (201, 202) and the limiting column 203 meshes with the plastic sheet covering track 107, restricting the movement of the hanging ball 101 in the direction perpendicular to the track, and further restricting the plastic sheet covering body 104, so that the movement direction of the plastic sheet covering body 104 during the retraction and extension process is consistent with the track direction until it is pulled to the designated position by the traction system, realizing the complete coverage of the salt pond.

[0034] When the plastic sheet covering is retracted, the plastic sheet covering moves in the reverse direction under the action of the retraction system. Under the traction of the plastic sheet covering, the hanging ball 101 enters the in-rail device 101 through the front tongue plate 303 and exits from the rear tongue plate 304. At this time, the magnetic detector 106 is activated. When the hanging ball 101 installed with the magnetic hanging ball sleeve 105 passes through the magnetic detector 106, the detector senses the change in the magnetic field and sends a signal to the retraction system to make it brake, avoiding damage to the plastic sheet covering when the retraction system continues to work when the magnetic hanging ball sleeve 105 contacts the in-rail device 102. At the same time, the plastic sheet covering continues to retract under the action of inertia. Since the outer dimension of the hanging ball 101 after installing the magnetic hanging ball sleeve 105 increases and it cannot enter the in-rail device 102 again, the plastic sheet covering finally stops under the blocking action of the in-rail device 102, completing the retraction operation. It should be noted that the traction system and the retraction system here refer to those including the traction motor, the plastic sheet covering roller and related mechanical equipment, etc., which are part of the plastic sheet covering system, and their forms and structures are determined by the situation of the salt field site, so they are not specifically shown in the present utility model.

[0035] Figure 6It is a structural and installation schematic diagram of the magnetic hanging ball sleeve 105. The hanging ball sleeve in the figure is designed according to the structural characteristics of the hanging ball 101, and is composed of two mutually meshing semi-rings, and is made of a ferromagnetic material coated with a polymer such as PTFE, PVC or PE. The semi-rings are fixed by the way that their inner arc surfaces fit with the limiting ends (201, 202) of the hanging ball. During installation, the four semi-rings are paired up in pairs by magnetic attraction and respectively fixed on the two limiting ends (201, 202) of the hanging ball 101 to complete the installation. This installation method does not require tools and is fast and convenient, which is conducive to the maintenance and debugging operations of the plastic covering system. After installation, the hanging ball 101 can immediately be used as a fixing mechanism for the plastic covering and a detected mechanism for the magnetic detector 106.

Claims

1. An in-rail device for plastic covering by floating roll method, comprising a hanging ball (101) and an in-rail device (102), characterized in that, The hanging ball includes a first limiting end (201) and a second limiting end (202). One side of the second limiting end (202) is connected to the first limiting end (201) through a limiting rod (203). An elastic connecting piece (204) is provided on the other side of the second limiting end (202) opposite to the first limiting end (201) for connecting with the plastic covering body (104). The rail inserter includes a fixed bracket (103). An upper track plate (301) and a lower track plate (302) which are arranged oppositely up and down are installed on the fixed bracket (103). A front tongue plate (303) is provided at the front end of each track plate, and a rear tongue plate (304) is provided at the rear end. A ridge-shaped protrusion (305) is provided on each of the upper track plate (301) and the lower track plate (302) along the axial direction and extends to the upper and lower tongue plates. The two ridge-shaped protrusions (305) are arranged oppositely to form a gap for the limiting rod (203) to slide. The front tongue plate (303) is provided with a track slot (306) for connecting the plastic covering track (107).

2. The in-rail device for plastic sheet covering by floating roll method according to claim 1, characterized in that, The hanging ball is further provided with a magnetic hanging ball sleeve (105), and the magnetic hanging ball sleeve (105) is sleeved on the limiting end. A magnetic detector (106) for automatic parking is provided on the plastic covering track.

3. The in-rail device for plastic sheeting covering by floating roll method according to any one of claims 1 or 2, characterized in that, The gap between the rear tongue plates (304) gradually decreases from both sides to the position where the ridge-shaped protrusions (305) are located, and the gap on the side of the rear tongue plate (304) close to the plastic covering body (104) is larger than the gap on the side away from the plastic covering body (104).

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