A packing clamping force compensation structure

Abstract

This utility model discloses a packing clamping force compensation structure, including a reactor body; the top of the reactor body is integrally formed with a packing cavity, a rotating shaft passes through the packing cavity, and a blocking ring is provided at the lower end of the packing cavity; a sealing packing is provided between the outer wall of the rotating shaft and the inner wall of the packing cavity, wherein the lower end of the sealing packing abuts against the upper end of the blocking ring; a clamping ring is also provided above the sealing packing, and the upper end of the sealing packing abuts against the lower end of the clamping ring; a first connecting flange is provided at the top of the packing cavity; the disc spring assembly of this utility model can compensate for the decrease in sealing effect caused by the shrinkage of the packing; the labyrinth seal formed by the annular sealing teeth and the packing seal formed by the sealing packing constitute a composite sealing mechanism, further improving the sealing effect of the reactor.

Description

Technical Field

[0001] This utility model relates to the field of packing seals, specifically a packing clamping force compensation structure. Background Technology

[0002] In many industrial sectors of the chemical industry, reaction vessels, as critical reaction containers, play a vital role in the production process and product quality due to their stable operation and cleanliness. A stirring device is installed in the reaction vessel to agitate the reactants. Generally, the main shaft of the stirring assembly is sealed to the vessel body using a packing seal.

[0003] For example, patent CN208302752U discloses a sealing and cooling device for a stirring shaft of a reactor, including a bottom cover fixed to the lower end of the stirring shaft and a sealing box provided above the bottom cover. A mechanical seal is provided above the sealing box. The stirring shaft passes through the bottom cover and the sealing box. A packing box is provided between the sealing box and the bottom cover. A sealing cavity is formed between the packing box and the stirring shaft. Sealing packing is provided in the sealing cavity. A compression ring is provided in the sealing box.

[0004] The aforementioned patent improves the cooling box by changing it to a fully enclosed cooling system, which enhances the cooling effect, increases the water flow area, and the increased contact surface can cool both the bottom packing seal and the upper mechanical seal, thus achieving a triple sealing effect, including packing seal, liquid seal, and mechanical seal.

[0005] However, the drawback of the aforementioned patent is that, due to the internal pressure generated during reactor operation, the packing seal is gradually pushed outwards by this pressure. This pressure causes the packing itself to deform and shrink. Although the clamping ring prevents the packing from escaping the sealing chamber, it loses its compressive effect on the deformed and shrunken packing, leading to a decrease in sealing performance. To maintain the sealing effect, the position of the clamping ring needs to be adjusted after a period of use to keep it in a state of constant compression of the packing. This results in the packing seal requiring tightening after a period of use, making the operation cumbersome.

[0006] For example, authorization

[0007] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0008] The purpose of this invention is to provide a packing clamping force compensation structure to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A packing clamping force compensation structure includes a reactor body; the top of the reactor body is integrally formed with a packing cavity, a rotating shaft passes through the packing cavity, and a blocking ring is provided at the lower end of the packing cavity; a sealing packing is provided between the outer wall of the rotating shaft and the inner wall of the packing cavity, wherein the lower end of the sealing packing abuts against the upper end of the blocking ring; a clamping ring is also provided above the sealing packing, and the upper end of the sealing packing abuts against the lower end of the clamping ring; a first connecting flange is provided at the top of the packing cavity; a second connecting flange is provided at the top of the clamping ring; the second connecting flange and the first connecting flange are connected by a plurality of clamping bolts; the clamping bolts include clamping screws and clamping nuts; a disc spring assembly is also sleeved on the clamping screw, and the upper and lower ends of the disc spring assembly abut against the clamping nut and the second connecting flange, respectively; a plurality of sequentially arranged annular sealing teeth are also provided at intervals on the inner wall of the blocking ring.

[0011] Furthermore, the first connecting flange is provided with a plurality of first connecting holes in a circular array, and the second connecting flange is provided with a plurality of second connecting holes in a circular array. The first connecting holes and the second connecting holes are provided in a one-to-one correspondence. The clamping bolt passes through the first connecting holes and the second connecting holes to connect the second connecting flange to the first connecting flange.

[0012] Furthermore, the clamping screw passes through the first connecting hole and the second connecting hole in sequence and is threadedly connected to the clamping nut.

[0013] Furthermore, the first connecting hole and the second connecting hole are each provided with six.

[0014] Furthermore, the disc spring assembly is composed of several disc springs stacked together.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] Disc spring assemblies can compensate for the decrease in sealing performance caused by the shrinkage of the packing material;

[0017] The labyrinth seal formed by the annular sealing teeth, combined with the packing seal formed by the sealing packing, constitutes a composite sealing mechanism, which further improves the sealing effect of the reactor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a packing clamping force compensation structure.

[0019] Figure 2 This is a front view of a packing clamping force compensation structure.

[0020] Figure 3 for Figure 2 Sectional view along the AA direction.

[0021] Figure 4 for Figure 3 A magnified view of a portion of point a.

[0022] Figure 5 This is a schematic diagram of a packing compression force compensation structure on a reactor body. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] Please see Figure 1-4 A packing compression force compensation structure includes a reactor body 1; the top of the reactor body 1 is integrally formed with a packing cavity 2, a rotating shaft 3 passes through the packing cavity 2, and a blocking annular portion 201 is provided at the lower end of the packing cavity 2.

[0025] Meanwhile, a sealing packing 4 is provided between the outer wall of the rotating shaft 3 and the inner wall of the packing cavity 2, wherein the lower end of the sealing packing 4 abuts against the upper end of the blocking annular part 201.

[0026] A clamping ring 5 is also provided above the sealing packing 4, and the upper end of the sealing packing 4 abuts against the lower end of the clamping ring 5.

[0027] The top of the packing cavity 2 is provided with a first connecting flange 202; the top of the clamping ring 5 is provided with a second connecting flange 501; the second connecting flange 501 and the first connecting flange 202 are connected by a number of clamping bolts 6.

[0028] The first connecting flange 202 is provided with a plurality of first connecting holes 203 arranged in a circular array, and the second connecting flange 501 is provided with a plurality of second connecting holes 502 arranged in a circular array. The first connecting holes 203 and the second connecting holes 502 are provided in a one-to-one correspondence. The clamping bolt 6 passes through the first connecting holes 203 and the second connecting holes 502 to connect the second connecting flange 501 to the first connecting flange 202.

[0029] In this design, six of the first connecting holes 203 and six of the second connecting holes 502 are provided.

[0030] The clamping bolt 6 includes a clamping screw 601 and a clamping nut 602. The clamping screw 601 passes through the first connecting hole 203 and the second connecting hole 502 in sequence and is threadedly connected to the clamping nut 602.

[0031] It is worth noting that a disc spring assembly 7 is also fitted onto the clamping screw 601. The upper and lower ends of the disc spring assembly 7 abut against the clamping nut 602 and the second connecting flange 501, respectively. The disc spring assembly 7 is composed of several stacked disc springs.

[0032] When using this utility model,

[0033] In this solution, due to the presence of the disc spring assembly 7, the sealing packing can always be compressed. When the sealing packing itself deforms and shrinks, the release force of the disc spring assembly 7 drives the compression ring 5 to move downward, so that the compression ring 5 can compress the sealing packing; thus compensating for the decrease in sealing effect caused by the shrinkage of the packing.

[0034] Meanwhile, in this scheme, the inner wall of the blocking annular part 201 is also provided with a number of sequentially arranged annular sealing teeth 9, and a series of interception gaps and expansion cavities are formed between the outer wall of the rotating shaft 3 and the adjacent annular sealing teeth 9. When the sealed medium passes through the gap of the tortuous labyrinth, a throttling effect is generated to achieve the purpose of preventing leakage.

[0035] In this design, the labyrinth seal formed by the annular sealing teeth 9 and the packing seal formed by the sealing packing constitute a composite sealing mechanism, which further improves the sealing effect of the reactor.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A packing compression force compensation structure, comprising a reactor body; characterized in that, The top of the reactor body is integrally formed with a packing cavity, through which a rotating shaft passes. A blocking ring is located at the lower end of the packing cavity. Sealing packing is placed between the outer wall of the rotating shaft and the inner wall of the packing cavity, with the lower end of the sealing packing abutting against the upper end of the blocking ring. A clamping ring is also located above the sealing packing, with the upper end of the sealing packing abutting against the lower end of the clamping ring. A first connecting flange is located at the top of the packing cavity. A second connecting flange is located at the top of the clamping ring. The second connecting flange and the first connecting flange are connected by several clamping bolts. Each clamping bolt includes a clamping screw and a clamping nut. A disc spring assembly is also fitted onto the clamping screw, with its upper and lower ends abutting against the clamping nut and the second connecting flange, respectively. The inner wall of the blocking ring is also provided with several sequentially arranged annular sealing teeth.

2. The packing clamping force compensation structure according to claim 1, characterized in that, The first connecting flange has a plurality of first connecting holes arranged in a circular array, and the second connecting flange has a plurality of second connecting holes arranged in a circular array. The first connecting holes and the second connecting holes are arranged in a one-to-one correspondence. The clamping bolts pass through the first connecting holes and the second connecting holes to connect the second connecting flange to the first connecting flange.

3. The packing clamping force compensation structure according to claim 2, characterized in that, The clamping screw passes through the first connecting hole and the second connecting hole in sequence and is threadedly connected to the clamping nut.

4. The packing clamping force compensation structure according to claim 3, characterized in that, The first connecting hole and the second connecting hole are each provided with six.

5. The packing clamping force compensation structure according to claim 1, characterized in that, The disc spring assembly is composed of several disc springs stacked together.

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