A snow ice machine rotary evaporator of convenient assembly

Abstract

A snow ice machine rotary evaporator of convenient assembly, including cylinder, one side of cylinder is provided with rotating shaft, the other side is provided with the middle shaft pipe of cold energy input and the sealing seat for middle shaft pipe installation, the front end of middle shaft pipe is provided with first shaft hole, the rear end is provided with liquid inlet shaft hole and back gas shaft hole, liquid inlet shaft hole and shaft hole are arranged in error, and all are in communication with first shaft hole, back gas pipe is worn in back gas shaft hole and first shaft hole, the front end of back gas pipe is sealed with first shaft hole, the rear end is sealed with back gas shaft hole, the inner wall of first shaft hole and back gas shaft hole and the outer wall of back gas pipe form liquid inlet cavity, the front end of middle shaft pipe is provided with capillary liquid outlet in communication with liquid inlet cavity, liquid inlet pipe is inserted into liquid inlet shaft hole, and is in communication with liquid inlet cavity, liquid inlet pipe and the rear end of liquid inlet shaft hole are sealed with each other, the utility model discloses, through the design of optimizing middle shaft pipe, sealing seat and limiting structure, effectively solved the problems of poor sealing, assembly complex and sealing failure under no load state in background art.

Description

Technical Field

[0001] This utility model relates to the field of shaved ice machine technology, and in particular to a rotary evaporator for shaved ice machines that is easy to assemble. Background Technology

[0002] A rotary evaporator generally includes a cylindrical body with a rotating shaft on one side and a central tube for cold energy input and a sealing seat for mounting the central tube on the other side. An inlet pipe and a return pipe are press-fitted onto one side of the central tube. A liquid inlet chamber is formed between the inner wall of the central tube and the outer wall of the return pipe, and refrigerant is pumped in through a capillary outlet. The refrigerant is then recycled through the return pipe to achieve cyclic cooling of the cylindrical body. For example, an improved rotary evaporator for a shaved ice machine is disclosed in patent number CN202420749279.2.

[0003] However, during the research and development process, the applicant discovered the following problems with the rotary evaporator structure described above: 1. Its inlet pipe and return pipe are squeezed together into the end of the central tube and then welded and fixed. After being squeezed in, there are gaps between the two and the central tube, and it is difficult to fix their positions accurately. In addition, poor welding is prone to occur, resulting in poor airtightness.

[0004] 2. The central tube and the sealing seat are equipped with a sealing ring. The sealing ring is located at the transition position between two adjacent inner sleeves and is placed between the inner sleeve and the outer cylinder platform. The cylinder is filled with refrigerant, which absorbs heat and vaporizes, causing the cylinder to be under high pressure. This causes the central tube to press tightly against the sealing seat to achieve a sealing effect. However, when the rotary evaporator is close to the outside temperature and reaches the no-load operation condition, the refrigerant inside the cylinder does not undergo heat exchange and vaporization. The cylinder is then in a non-high-pressure state. At this time, the pressure between the central tube and the sealing seat decreases, and the sealing ring may fail to seal. 3. Both the central shaft tube and the sealing seat are limited by retaining rings. Workers need additional tools to assemble the retaining rings, making the assembly process complicated.

[0005] Therefore, further improvements are needed. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rotary evaporator for a snow ice machine that is easy to assemble.

[0007] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a rotary evaporator for a snow ice machine that is easy to assemble, including a cylinder, a rotating shaft is provided on one side of the cylinder, and a central tube for cold energy input and a sealing seat for installing the central tube are provided on the other side. The central tube has a first shaft hole at its front end and a liquid inlet shaft hole and a gas return shaft hole at its rear end. The liquid inlet shaft hole and the shaft hole are staggered and both communicate with the first shaft hole. The gas return pipe passes through the gas return shaft hole and the first shaft hole. The front end of the gas return pipe is sealed to the first shaft hole, and the rear end is sealed to the gas return shaft hole. A liquid inlet cavity is formed between the inner wall of the first shaft hole and the gas return shaft hole and the outer wall of the gas return pipe. The central tube has a capillary outlet at its front end that communicates with the liquid inlet cavity. The liquid inlet pipe is inserted into the liquid inlet shaft hole and communicates with the liquid inlet cavity. The liquid inlet pipe is sealed to the rear end of the liquid inlet shaft hole.

[0008] Optionally, the sealing seat has a stepped cylindrical inner sleeve structure with an enlarged radial dimension at one end facing the cylinder; the outer wall of the central tube has an outer cylinder platform that matches the radial dimension of the inner sleeve; a sealing ring is abutted between the ends of the outer cylinder platform and the inner sleeve.

[0009] Optionally, a limiting device is provided at the open end of the inner sleeve; a spring is provided between the limiting device and the outer cylinder platform to keep the outer cylinder platform in a state of compressing the sealing ring.

[0010] Optionally, the limiting device is a limiting ring with an annular opening; the opening end of the inner sleeve is provided with a limiting ring groove for locking the limiting ring; the limiting ring can shrink and deform when pressed into the inner sleeve; when the limiting ring moves to the position of the limiting ring groove, the limiting ring can expand and be locked in the limiting ring groove.

[0011] Optionally, the limiting annular groove is located near the open end of the inner sleeve; the open end of the inner sleeve is provided with a tapered chamfer structure.

[0012] The beneficial effects of this utility model are as follows: By optimizing the design of the central shaft tube, sealing seat, and limiting structure, it effectively solves the problems of poor sealing performance, complex assembly, and sealing failure under no-load conditions existing in the prior art. Specific beneficial effects include: 1. Improved sealing and assembly precision: By setting independent first shaft hole, liquid inlet shaft hole and gas return shaft hole on the central shaft tube, and making the liquid inlet pipe and gas return pipe seal with each other with the shaft hole, the gap and poor air tightness problems caused by the traditional liquid inlet pipe and gas return pipe being squeezed and welded together are avoided, ensuring the reliability and stability of refrigerant circulation and reducing the product defect rate.

[0013] 2. Enhanced sealing reliability: A sealing ring and spring are installed between the sealing seat and the central tube, so that the central tube always keeps the sealing ring under pressure. Even under no-load operation (non-high pressure state inside the cylinder), an effective seal can be maintained to prevent refrigerant leakage.

[0014] 3. Simplified assembly process: The use of a limiting ring instead of a traditional snap ring allows the limiting ring to shrink and deform before being inserted into the limiting ring groove, eliminating the need for additional tools, reducing assembly difficulty and time, and improving production efficiency.

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the rotary evaporator for the snow ice machine of this utility model.

[0017] Explanation of key component symbols: 10. Cylinder body; 11. Drive shaft; 20. Sealing seat; 21. Inner sleeve; 22. Limiting ring groove; 30. Central shaft tube; 31. First shaft hole; 32. Liquid inlet shaft hole; 33. Gas return shaft hole; 34. Capillary liquid outlet; 35. Outer cylinder platform; 40. Sealing ring; 50. Gas return pipe; 60. Liquid inlet chamber; 70. Liquid inlet pipe; 80. Limiting device; 81. Spring component. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Example Reference Figure 1 The present invention proposes a convenient assembly rotary evaporator for a snow ice machine, including a cylinder 10, a rotating shaft on one side of the cylinder 10, and a central shaft tube 30 for cold energy input and a sealing seat 20 for mounting the central shaft tube 30 on the other side. The central shaft tube 30 has a first shaft hole 31 at its front end and a liquid inlet shaft hole 32 and a gas return shaft hole 33 at its rear end. The liquid inlet shaft hole 32 and the shaft hole are staggered and both communicate with the first shaft hole 31. The gas return pipe 50 passes through the gas return shaft hole 33 and the first shaft hole 31. The front end of the gas return pipe 50 is sealed to the first shaft hole 31 and the rear end is sealed to the gas return shaft hole 33. A liquid inlet chamber 60 is formed between the inner wall of the first shaft hole 31 and the gas return shaft hole 33 and the outer wall of the gas return pipe 50. The central shaft tube 30 has a capillary outlet 34 at its front end that communicates with the liquid inlet chamber 60. The liquid inlet pipe 70 is inserted into the liquid inlet shaft hole 32 and communicates with the liquid inlet chamber 60. The liquid inlet pipe 70 is sealed to the rear end of the liquid inlet shaft hole 32.

[0023] In this invention, by optimizing the design of the central shaft tube 30, the sealing seat 20, and the limiting structure, the problems of poor sealing performance, complex assembly, and sealing failure under no-load conditions existing in the prior art are effectively solved. Specific beneficial effects include: 1. Improved sealing and assembly precision: By setting independent first shaft hole 31, liquid inlet shaft hole 32 and gas return shaft hole 33 on the central shaft tube 30, and making the liquid inlet pipe 70 and gas return pipe 50 seal with each other with the shaft hole, the gap and poor air tightness problems caused by the traditional joint compression and welding of liquid inlet pipe 70 and gas return pipe 50 are avoided, ensuring the reliability and stability of refrigerant circulation and reducing the product defect rate.

[0024] 2. Enhanced sealing reliability: A sealing ring 40 and a spring 81 are set between the sealing seat 20 and the central shaft tube 30, so that the central shaft tube 30 always keeps the sealing ring 40 in a compressed state. Even under no-load operation (non-high pressure state inside the cylinder 10), an effective seal can be maintained to prevent refrigerant leakage.

[0025] 3. Simplified assembly process: The use of a limiting ring instead of a traditional snap ring. The limiting ring can shrink and deform to fit into the limiting ring groove 22, eliminating the need for additional tools, reducing assembly difficulty and time, and improving production efficiency.

[0026] In this embodiment, the sealing seat 20 has a stepped cylindrical inner sleeve 21 with an enlarged radial dimension at one end facing the cylinder 10; the outer wall of the central shaft tube 30 has an outer cylinder platform 35 that matches the radial dimension of the inner sleeve 21; a sealing ring 40 is abutted between the outer cylinder platform 35 and the end of the inner sleeve 21. The radial dimension matching between the inner sleeve 21 and the outer cylinder platform 35, and the sealing ring 40 at the end, enhances the sealing capability of the sealing seat 20. This structure effectively prevents refrigerant leakage under high pressure conditions inside the cylinder 10, and the mechanical fit improves the overall structural stability and pressure resistance.

[0027] Specifically, a limiting device 80 is provided at the open end of the inner sleeve 21; a spring 81 is provided between the limiting device 80 and the outer cylinder platform 35 to keep the outer cylinder platform 35 in a state of compressing the sealing ring 40. The addition of the spring 81 and the limiting device 80 ensures that the outer cylinder platform 35 continuously compresses the sealing ring 40 under the action of the spring. This ensures that even during no-load operation (non-high-pressure state inside the cylinder 10), the sealing ring 40 between the central shaft tube 30 and the sealing seat 20 can maintain sufficient clamping force, avoiding the risk of seal failure and improving the reliability of the equipment under varying operating conditions.

[0028] In this embodiment, the limiting device 80 is a limiting ring with an annular opening; the open end of the inner sleeve 21 is provided with a limiting ring groove 22 for engaging the limiting ring; the limiting ring can shrink and deform when pressed into the inner sleeve 21; when the limiting ring moves to the position of the limiting ring groove 22, the limiting ring can expand and be locked in the limiting ring groove 22. The limiting device 80 is specifically embodied as a limiting ring with an annular opening, and the engaging is achieved through the limiting ring groove 22. The limiting ring can shrink and deform to engage in the annular groove, eliminating the need for caliper tools during assembly, simplifying the operation steps, reducing labor costs, and ensuring the firmness and repeatability of the limiting, making it suitable for rapid assembly production lines.

[0029] Furthermore, the limiting ring groove 22 is located near the open end of the inner sleeve 21; the open end of the inner sleeve 21 is provided with a tapered chamfer structure. The tapered chamfer guides the limiting ring to be smoothly pressed in and expanded, further improving the convenience and precision of assembly. This design reduces resistance and wear during assembly, ensures that the limiting ring is properly secured, and enhances the durability and stability of the structure.

[0030] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A rotary evaporator for a conveniently assembled shaved ice machine, comprising a cylindrical body (10), a rotating shaft being provided on one side of the cylindrical body (10), and a central shaft tube (30) for cold energy input and a sealing seat (20) for mounting the central shaft tube (30) being provided on the other side; characterized in that: The central shaft tube (30) has a first shaft hole (31) at its front end and a liquid inlet shaft hole (32) and a gas return shaft hole (33) at its rear end; the liquid inlet shaft hole (32) and the shaft hole are staggered and both communicate with the first shaft hole (31); the gas return pipe (50) passes through the gas return shaft hole (33) and the first shaft hole (31); the front end of the gas return pipe (50) is sealed to the first shaft hole (31), and the rear end is sealed to the gas return shaft hole (33). Sealing; an inlet chamber (60) is formed between the inner wall of the first shaft hole (31) and the return air shaft hole (33) and the outer wall of the return air pipe (50); a capillary outlet (34) communicating with the inlet chamber (60) is opened at the front end of the central shaft pipe (30); the inlet pipe (70) is inserted into the inlet shaft hole (32) and communicates with the inlet chamber (60); the inlet pipe (70) and the rear end of the inlet shaft hole (32) are sealed to each other.

2. The conveniently assembled rotary evaporator for a shaved ice machine according to claim 1, characterized in that: The sealing seat (20) has a stepped inner sleeve (21) structure with an enlarged radial dimension at one end facing the cylinder (10); the outer wall of the central tube (30) has an outer cylinder platform (35) that matches the radial dimension of the inner sleeve (21); a sealing ring (40) is provided between the ends of the outer cylinder platform (35) and the inner sleeve (21).

3. The conveniently assembled rotary evaporator for a shaved ice machine according to claim 2, characterized in that: The inner sleeve (21) is provided with a limiting device (80) at its open end; a spring (81) is provided between the limiting device (80) and the outer cylinder platform (35) to keep the outer cylinder platform (35) in a state of compressing the sealing ring (40).

4. The conveniently assembled rotary evaporator for a shaved ice machine according to claim 3, characterized in that: The limiting device (80) is a limiting ring with an annular opening; the opening end of the inner sleeve (21) is provided with a limiting ring groove (22) for locking the limiting ring; the limiting ring can shrink and deform when it is pressed into the inner sleeve (21); when the limiting ring moves to the position of the limiting ring groove (22), the limiting ring can expand and be locked in the limiting ring groove (22).

5. The conveniently assembled rotary evaporator for a shaved ice machine according to claim 4, characterized in that: The limiting annular groove (22) is located near the opening end of the inner sleeve (21); the opening end of the inner sleeve (21) is provided with a tapered chamfer structure.

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