Spiral instant freezer capable of avoiding excessive tension of return belt

Abstract

The utility model relates to a spiral instant freezer capable of avoiding overlarge tension of a return belt, which comprises a feed port and a discharge port, a rotatable scraper is arranged below the return belt of a conveyor belt in the discharge port, the rotatable scraper is connected with an elastic piece, the elastic piece is fixed with the discharge port through a fixing component, and a proximity switch is arranged behind the rotatable scraper. When uncooked food which is not severely adhered to the return belt of the conveying belt passes through the metal scraping plate, the metal scraping plate can directly scrape off the uncooked food. When a large number of adhered uncooked food or uncooked food severely frozen on the contact surface of the uncooked food and the return belt of the conveying belt passes through the metal scraper, the metal scraper cannot directly scrape off the uncooked food, the elastic piece is stretched and deformed, and the machine can be stopped immediately when the proximity switch at the deformation end point detects an electric signal generated by the metal scraper. And an electric signal sent by the proximity switch enables the equipment to stop and also gives a buzzing alarm.

Description

Technical Field

[0001] The utility model belongs to a spiral quick-freezing machine, in particular to a spiral quick-freezing machine which can avoid excessive pulling force of a return belt. Background Art

[0002] In recent years, people's living standards have greatly improved, and with the encouragement of national policies, the demand for frozen foods has shown a blowout growth.

[0003] As a key part in the quick freezing industry, the spiral quick freezer has the characteristics of compact structure, wide application, small footprint, and strong freezing capacity. It is an energy-saving quick freezing device.

[0004] The temperature inside the spiral freezer is extremely low, generally around -35°C. When raw food enters the spiral freezer without packaging or trays, the heat of the raw food is quickly lost due to the effect of heat transfer, and the contact surface between the raw food and the spiral freezer conveyor belt freezes instantly, resulting in adhesion.

[0005] During normal production, the frozen raw food will flow out of the spiral quick freezer's outlet to the customer's next production line. In some cases, such as raw food such as chicken or fish with skin, some of it will stick to the spiral quick freezer's conveyor belt. As the equipment runs, the raw food sticking to the conveyor belt will increase the friction between the conveyor belt and the conveyor belt track, and at the same time increase the load on the quick freezer's transmission motor. When the transmission motor has redundant performance, the conveyor belt is easily deformed or even broken; when the transmission motor has insufficient performance, the motor itself is easily burned out. Summary of the invention

[0006] The utility model aims to overcome the above disadvantages and provide a spiral quick-freezing machine which can avoid excessive pulling force of the return belt.

[0007] The purpose of the utility model is achieved through the following technical scheme: a spiral quick-freezing machine that avoids excessive tension on a return belt, comprising a feed port and a discharge port, a rotatable scraper is provided below the return belt of the conveyor belt in the discharge port, the rotatable scraper is connected to an elastic member, the elastic member is fixed to the discharge port through a fixing assembly, and a proximity switch is provided behind the rotatable scraper.

[0008] A further improvement of the utility model is that the rotatable scraper is fixed below the return belt of the conveyor belt through a fixed plate, and the rotatable scraper is connected to the fixed plate through bolts or pins.

[0009] A further improvement of the utility model is that the elastic member is a traction spring.

[0010] A further improvement of the utility model is that the rotatable scraper can touch the rear proximity switch when rotating backward.

[0011] A further improvement of the utility model is that the friction force of the return belt of the conveyor belt during normal operation plus the maximum traction force of the elastic member should be less than or equal to the safe bearing capacity of the return belt of the conveyor belt.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. When raw food that is not seriously adhered to the return belt of the conveyor belt passes through the metal scraper, the metal scraper can directly scrape off the raw food.

[0014] 2. When there is a large amount of raw food sticking to the conveyor or the contact surface with the conveyor return belt is severely frozen, the metal scraper cannot scrape it off directly. The elastic part is stretched and deformed. The proximity switch at the end point of the deformation can immediately stop the machine when it detects the electrical signal generated by the metal scraper.

[0015] 3. The electrical signal from the proximity switch will shut down the equipment and sound a buzzer alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 This is an enlarged view of the discharge port when the rotatable scraper of the utility model does not rotate;

[0019] Figure 4 It is an enlarged view of the discharge port when the rotatable scraper of the utility model rotates;

[0020] Numbers in the figure: 1-rotatable scraper, 2-fixed component, 3-elastic member, 4-proximity switch, 5-discharge port, 6-return belt of conveyor belt, 7-feed port, 8-fixed plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The elements and features described in one embodiment of the utility model can be combined with the elements and features shown in one or more other embodiments. It should be noted that for the purpose of clarity, the description omits the representation and description of components and processes that are not related to the utility model and are known to ordinary technicians in this field. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 and Figure 2 As shown, a spiral quick-freezing machine for avoiding excessive tension of the return belt mainly utilizes a device consisting of a metal scraper, a fixing assembly, a traction spring, and a proximity switch, which is fixed near the return belt of the discharge port of the spiral quick-freezing machine. That is, it includes a feed port 7 and a discharge port 5, and a rotatable scraper 1 is provided below the return belt 6 of the conveyor belt in the discharge port 5. Specifically, the rotatable scraper 1 is fixed below the return belt 6 of the conveyor belt through a fixing plate 8, and the rotatable scraper 1 is connected to the fixing plate 8 through bolts or pins. The rotatable scraper 1 is connected to an elastic member 3, and the elastic member 3 is fixed to the discharge port 5 through a fixing assembly 2. The elastic member 3 is a traction spring, and a proximity switch 4 is provided behind the rotatable scraper 1. When the rotatable scraper 1 rotates backward, it can touch the proximity switch 4 behind.

[0023] During normal production, the frozen raw food will flow out of the spiral quick freezer outlet to the customer's next production. Figure 3 As shown in FIG. 1 , when raw food that is not seriously adhered to the return belt of the conveyor belt passes through the metal scraper, the metal scraper can directly scrape off the raw food; Figure 4 As shown in the figure, when raw food with a large amount of adhesion or severe ice on the contact surface of the conveyor return belt passes through the metal scraper, the metal scraper cannot scrape it off directly, and the traction tension spring will be affected by the external load and produce tensile deformation. The proximity switch at the end of the deformation detects the metal scraper to form an electrical circuit, and this electrical signal is given to the spiral quick freezer to stop it and immediately sound a buzzer alarm. The feedback of the loop signal formed by the proximity switch and the metal scraper stops the equipment from running, avoiding irreversible damage to the equipment and reducing losses caused by maintenance. The maximum traction force of the friction force plus the tension spring during normal operation of the conveyor return belt should be less than or equal to the safe bearing capacity of the conveyor return belt. The materials used for the components should be food grade materials.

[0024] Finally, it should be noted that: although the utility model and its advantages have been described in detail above, it should be understood that various changes, substitutions and transformations can be made without exceeding the spirit and scope of the utility model defined by the attached claims. Moreover, the scope of the utility model is not limited to the specific embodiments of the processes, devices, means, methods and steps described in the specification. It will be easily understood by those of ordinary skill in the art from the disclosure of the utility model that according to the utility model, existing and future processes, devices, means, methods or steps that perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the corresponding embodiments described herein can be used. Therefore, the attached claims are intended to include such processes, devices, means, methods or steps within their scope.

Claims

1. A spiral quick freezer for preventing excessive tension in a return belt, comprising a feed inlet (7) and a discharge outlet (5), characterized in that: A rotatable scraper (1) is provided below the return belt (6) of the conveyor belt in the discharge port (5); the rotatable scraper (1) is connected to an elastic member (3); the elastic member (3) is fixed to the discharge port (5) via a fixing assembly (2); and a proximity switch (4) is provided behind the rotatable scraper (1).

2. A spiral quick freezer for avoiding excessive tension of the return belt according to claim 1, characterized in that: The rotatable scraper (1) is fixed below the return belt (6) of the conveyor belt via a fixing plate (8), and the rotatable scraper (1) is connected to the fixing plate (8) via bolts or a pin shaft.

3. A spiral quick freezer for avoiding excessive tension of the return belt according to claim 1, characterized in that: The elastic member (3) is a traction spring.

4. A spiral quick freezer for avoiding excessive tension of the return belt according to claim 1, characterized in that: When the rotatable scraper (1) rotates backward, it can touch the proximity switch (4) at the rear.

5. A spiral quick freezer for avoiding excessive tension of the return belt according to claim 1, characterized in that: The friction force of the return belt (6) of the conveyor belt during normal operation plus the maximum traction force of the elastic member (3) should be less than or equal to the safe bearing capacity of the return belt (6) of the conveyor belt.

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