阅读说明：本技术 一种牛奶机活塞结构 (Piston structure of milk machine ) 是由 聂磊 胡燕林 于 2019-10-29 设计创作，主要内容包括：本发明涉及活塞领域,尤指一种牛奶机活塞结构,包括由超高分子量聚乙烯制成的主体和压盖、以及不锈钢连接螺杆,所述主体一侧的中心位置设有基座,并且基座内部设有连接孔,所述连接孔内设有螺纹,所述连接螺杆与连接孔螺接固定,所述中心基座与主体外圈之间设有一圈空位,并且空位内填充固化后的硅胶,所述主体外圈中间设有一圈凸台,所述主体位于凸台的两侧形成薄壁,所述压盖与连接螺杆表面螺接,并且外表面与主体紧配。本发明活塞结构达到食品级要求,能满足直接与牛奶接触的要求,且超高分子量聚乙烯主体和压盖十分耐磨,在使用时摩擦力十分小,无爬行现象,经久耐用,能够代替国外的进口件,从而大大降低生产和维护成本。(The invention relates to the field of pistons, in particular to a piston structure of a milk machine, which comprises a main body made of ultra-high molecular weight polyethylene, a gland and a stainless steel connecting screw rod, wherein a base is arranged at the center position of one side of the main body, a connecting hole is formed in the base, threads are arranged in the connecting hole, the connecting screw rod is fixedly connected with the connecting hole in a screwed mode, a circle of vacant positions are formed between the central base and an outer ring of the main body and filled with solidified silica gel, a circle of boss is arranged in the middle of the outer ring of the main body, thin walls are formed on two sides of the boss of the main body, the gland is in screwed connection with the. The piston structure of the invention meets the requirement of food grade, can meet the requirement of direct contact with milk, and the ultra-high molecular weight polyethylene main body and the gland are very wear-resistant, have very small friction force when in use, have no creeping phenomenon, are durable in use, and can replace foreign inlet parts, thereby greatly reducing the production and maintenance cost.)

1. The utility model provides a milk machine piston structure which characterized in that: including main part and gland and the stainless steel connecting screw who is made by ultra high molecular weight polyethylene, the central point of main part one side puts and is equipped with the base to the inside connecting hole that is equipped with of base, be equipped with the screw thread in the connecting hole, connecting screw is fixed with the connecting hole spiro union, be equipped with the round vacancy between central base and the main part outer lane to silica gel after the solidification is filled in the vacancy, be equipped with the round boss in the middle of the main part outer lane, the main part is located the both sides of boss and forms the thin wall, gland and connecting screw surface spiro union to surface and main part tight fit.

2. A piston structure of a milk machine according to claim 1, characterized in that: the left side and the right side of the main body outer ring are provided with guide angles, and the other side of the main body is a plane.

3. A piston structure of a milk machine according to claim 1, characterized in that: the outer diameter of the boss is in interference fit with the corresponding piston cylinder.

4. A piston structure of a milk machine according to claim 1, characterized in that: and a gap is reserved in the silica gel filled in the vacancy.

5. A piston structure of a milk machine according to claim 1, characterized in that: the height of the central base is lower than that of the outer ring of the main body.

6. A piston structure of a milk machine according to claim 1, characterized in that: the gland comprises a connecting part and an annular part, the connecting part is in threaded connection with the connecting screw rod, and the annular part is tightly matched with the main body.

7. A piston structure of a milk machine according to claim 1, characterized in that: glue is also arranged between the connecting screw rod and the connecting hole.

8. A piston structure of a milk machine according to claim 1, characterized in that: silica gel is respectively coated between the gland and the main body and between the gland and the connecting screw rod.

9. A piston structure of a milk machine according to claim 1, characterized in that: the hardness of the silica gel is 60 degrees.

10. A piston structure of a milk machine according to claim 1, characterized in that: the connecting screw is an SS301 stainless steel connecting screw.

Technical Field

The invention relates to the field of pistons, in particular to a piston structure of a milk machine.

Background

The milk filling machine is a modern automatic device specially designed for milk packaging, and can effectively improve the milk production efficiency and ensure the sanitation, taste and safety of milk. The use of seals on machines is directly related to the quality of the milk product.

The piston of the milk machine is arranged in the piston cylinder, the piston is driven by the cylinder to move back and forth in the cylinder, and the milk in the charging basket is extracted and sprayed out when the piston moves back and forth. The amount of milk drawn and sprayed each time can be controlled by limiting and precisely adjusting the forward and backward positions of the piston during its movement, and the amount of milk filled each time can be precisely controlled. The milk piston has to have good sealing performance so as to ensure the accuracy of the filling quantity; the milk piston is ensured to be durable only by good wear resistance; the piston is directly contacted with the milk, so that the material for producing the sealing element is required to meet the requirement of food grade; because the milk is easy to breed bacteria, the piston is convenient to clean and disinfect and has no cleaning dead angle.

Most sealing parts on the milk filling machine visible in the market in China are inlet parts, and the production cost and the later maintenance cost are high. Therefore, there is a need to autonomously develop new seals to replace the inlet pieces, thereby reducing production and maintenance costs.

Disclosure of Invention

In order to solve the problems, the invention provides a piston structure of a milk machine, which replaces foreign inlet parts, thereby greatly reducing the production and maintenance cost.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a milk machine piston structure, includes main part and gland and the stainless steel connecting screw rod of being made by ultra high molecular weight polyethylene, the central point of main part one side puts and is equipped with the base to the inside connecting hole that is equipped with of base, be equipped with the screw thread in the connecting hole, connecting screw rod is fixed with the connecting hole spiro union, be equipped with the round vacancy between central base and the main part outer lane to silica gel after the solidification is filled to the vacancy, be equipped with the round boss in the middle of the main part outer lane, the main part is located the both sides of boss and forms the thin wall, gland and connecting screw rod surface spiro union to surface and main part.

Furthermore, the left side and the right side of the outer ring of the main body are provided with guide angles, and the other side of the main body is a plane.

Further, the outer diameter of the boss is in interference fit with the corresponding piston cylinder.

Furthermore, a gap is reserved in the silica gel filled in the vacancy.

Wherein, the height of the central base is lower than that of the outer ring of the main body.

Further, the gland comprises a connecting part and an annular part, the connecting part is in threaded connection with the connecting screw rod, and the annular part is tightly matched with the main body.

Furthermore, glue is arranged between the connecting screw rod and the connecting hole.

Furthermore, silica gel is respectively coated between the gland and the main body and between the gland and the connecting screw rod.

The hardness of the silica gel is 60 degrees, and the connecting screw is an SS301 stainless steel connecting screw.

The invention has the beneficial effects that:

1. the ultra-high molecular weight polyethylene main body and the gland, the stainless steel connecting screw and the silica gel material all meet the requirement of food grade and can meet the requirement of direct contact with milk, and the ultra-high molecular weight polyethylene main body and the gland are very wear-resistant, have very small friction force when in use, have no creeping phenomenon and are durable in use, and can replace foreign inlet parts, thereby greatly reducing the production and maintenance cost;

2. when the piston is arranged in the piston cylinder, the boss is in a compressed state, and a certain adhesion force exists between the outer diameter and the cylinder wall, so that the sealing performance of the piston is excellent, the piston can adapt to eccentricity generated in a certain operation process, and certain abrasion is compensated;

3. a circle of vacant sites are processed between the central base and the outer ring, and a section of thin wall is arranged on two sides of the boss, so that the boss can be freely compressed, and the deformation has better flexibility and freedom degree; the silica gel after solidification is filled in the vacant positions, and the silica gel provides larger elasticity and keeps the elasticity lasting when the lug boss is compressed;

4. when the gland is assembled, a small amount of silica gel is smeared on the tight fit position of the outer ring of the gland and the main body in advance, and the silica gel is also smeared on the position of the thread joint position of the gland and the connecting screw rod, so that the sealing of the micro-joint is ensured, and the piston is enabled not to have any cleaning dead angle after solidification.

Drawings

Fig. 1 is a cross-sectional view of a piston structure of the present invention.

Fig. 2 is a sectional view of the main body of the present invention.

Figure 3 is a cross-sectional view of a gland of the present invention.

The reference numbers illustrate: 1. a main body; 11. a base; 12. connecting holes; 13. a vacancy; 14. a boss; 15. thin wall; 16. a guide angle; 17. a void; 2. a gland; 21. a connecting portion; 22. an annular portion; 3. connecting a screw rod; silica gel.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-3, the present invention relates to a piston structure of a milk machine, which comprises a main body 1 made of ultra-high molecular weight polyethylene, a gland 2, and a stainless steel connecting screw rod 3, wherein a base 11 is disposed at the center of one side of the main body 1, a connecting hole 12 is arranged in the base 11, threads are arranged in the connecting hole 12, the connecting screw rod 3 is fixed with the connecting hole 12 in a threaded manner, a circle of vacant positions 13 are arranged between the central base 11 and the outer ring of the main body 1, and the solidified silica gel 4 is filled in the vacant site 13, a circle of boss 14 is arranged in the middle of the outer ring of the main body 1, the main body 1 is positioned at two sides of the boss 14 to form thin walls 15, the gland 2 is in threaded connection with the surface of the connecting screw rod 3, the outer surface of the gland is tightly matched with the main body 1, wherein, gland 2 outer lane surface and main part 1 tight fit not only can support main part 1, can also let the slit between gland 2 and the main part 1 littleer as far as possible.

In this embodiment, the boss 14 on the outer ring of the main body 1 is a main sealing part of the piston sealing element, the outer diameter of the boss 14 has a large interference with the piston cylinder, when the piston is installed in the piston cylinder, the boss 14 is in a compressed state, and a certain adhesion force is provided between the outer diameter and the cylinder wall, so that the sealing performance of the piston is excellent, and the piston can adapt to a certain eccentricity generated in the operation process and compensate a certain abrasion.

A circle of vacant sites 13 are formed between the central base 11 and the outer ring of the main body 1, thin-wall parts can be arranged on two sides of each boss 14 due to the vacant sites 13, and the bosses 14 can be freely compressed to deform, so that the bosses have better flexibility and freedom. The empty position 13 is filled with the silica gel 4 with the hardness of 60 degrees after solidification, the silica gel 4 provides larger elasticity and keeps the durability of the elasticity when the boss 14 is compressed, a small amount of gaps 17 are slightly reserved when the silica gel 4 is filled, and when the boss 14 is compressed and then the silica gel 4 is compressed, the total volume of the silica gel 4 has a position capable of avoiding.

In this embodiment, the clearance between the outer diameter of the thin wall 15 portion and the inner diameter of the piston cylinder is relatively small, and the outer diameter portion extends to a portion of the thicker portion of the main body 1, which can play a guiding role during operation. In addition, the left side and the right side of the outer ring of the main body 1 are provided with 15-degree chamfers, so that a guide angle 16 is formed, and the installation is convenient. The other side of the main body 1 is of a plane structure, and the main body is simple and convenient and is easy to process and clean.

Referring to fig. 1 and 3, the gland 2 includes a connecting portion 21 and an annular portion 22, the connecting portion 21 is provided with a thread for screwing the central base 11, the annular portion 22 covers an opening on the empty space 13 of the main body 1, the main body 1 is tightly fitted, the height of the central base 11 is lower than that of the outer ring of the main body 1, and the thickness of the annular portion 22 is the same as that of the height, so that the gland 2 can be tightly fitted with the main body 1; in addition, silica gel 4 is coated between the gland 2 and the main body 1 and between the gland 2 and the connecting screw rod 3 respectively, so that the integral sealing performance of the product is ensured, and no cleaning dead angle is generated.

In a preferred embodiment, the silicone rubber 4 is a silicone rubber 4 with a shore a hardness of 60 °, and the connecting screw 3 is an SS301 stainless steel connecting screw 3.

The mounting process of the piston of the milk machine in the embodiment is as follows: firstly, the connecting screw rod 3 is fixed with the base 11 of the main body 1 in a threaded manner through threads, a certain amount of glue is pre-placed in the connecting hole 12 before the threaded manner, and the glue is also arranged between the connecting screw rod 3 and the connecting hole 12, so that the connecting screw rod 3 and the main body 1 are ensured not to loosen when in use; then, the gland 2 is sleeved on the connecting screw rod 3 and screwed tightly, covers the opening on the vacancy 13 of the main body 1 and completely covers the opening, so that the surface of the outer ring of the gland 2 is tightly matched with the main body 1; when the gland 2 is assembled, a small amount of silica gel is smeared on the tight fit position of the outer ring of the gland 2 and the main body 1 in advance, and the silica gel 4 is also smeared on the position of the thread joint of the gland 2 and the connecting screw rod 3, so that the micro-seam is sealed, and after solidification, a whole finished product without any cleaning dead angle can be obtained.

It is further understood that the terms "fixed," "connected," and the like are to be construed broadly and their meanings in the context of the invention may be understood by those skilled in the art as appropriate, unless otherwise explicitly stated or limited.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and not restrictive, and various changes and modifications to the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are intended to fall within the scope of the present invention defined by the appended claims.