Double-liquid-seal sealing mechanism

Abstract

The utility model discloses a sealing mechanism with double liquid seals, which is characterized in that a first fixing plate and a second fixing plate are fixedly arranged on a sealing cover, the second fixing plate is positioned below the first fixing plate, a shaft sleeve penetrates through the center of the first fixing plate and the center of the second fixing plate, and the shaft sleeve is fixed on the first fixing plate and the second fixing plate; the first sealing ring sleeve and the second sealing ring sleeve are both arranged on the shaft sleeve in a sleeving mode, the first sealing ring is located below the first fixing plate, the top of the first sealing ring abuts against the bottom face of the first fixing plate, and the second sealing ring is located below the second fixing plate; the top of the second sealing ring abuts against the bottom face of the second fixing plate, the shaft sleeve can be stably fixed to the center of the sealing cover through the first fixing plate and the second fixing plate, the first sealing ring and the second sealing ring are arranged below the first fixing plate and the second fixing plate correspondingly, and through double sealing of the first sealing ring and the second sealing ring, the sealing effect is good. A gap between the first fixing plate and the shaft sleeve and a gap between the second fixing plate and the shaft sleeve are sealed, and double-layer liquid sealing prevents liquid from permeating into the motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial pump technical field especially relates to a double liquid seal sealing mechanism. BACKGROUND

[0002] The industrial pump is suitable for non-corrosive or slightly corrosive liquid, and can transport liquid with a maximum temperature of 120 DEG C. It is widely used in water supply, industrial pressurization, industrial liquid transportation, water treatment, air conditioning cooling, heating circulation, irrigation and other industries.

[0003] The industrial pump usually comprises two main parts of a motor and a pump body, and the motor and the pump body are connected through a sealing mechanism. The sealing mechanism is mainly used for preventing liquid from penetrating into the motor. In the prior art, the sealing mechanism is mainly single-layer sealing, and the sealing mechanism is simple and can seal to a certain extent, but liquid penetration still occurs. SUMMARY

[0004] Based on the above, the purpose of the utility model is to provide a double liquid seal sealing mechanism, double-layer liquid seal, prevent liquid from penetrating into the motor.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a double liquid seal sealing mechanism, which comprises a sealing cover, a shaft sleeve, a first fixed plate, a second fixed plate, a first sealing ring and a second sealing ring.

[0007] The sealing cover is a hollow structure with an upper opening and a lower opening, the first fixed plate and the second fixed plate are fixedly arranged on the sealing cover, the second fixed plate is located below the first fixed plate, the shaft sleeve passes through the center of the first fixed plate and the second fixed plate, the shaft sleeve is fixed on the first fixed plate and the second fixed plate, the first sealing ring and the second sealing ring are sleeved on the shaft sleeve, the first sealing ring is located below the first fixed plate, the top of the first sealing ring abuts against the bottom surface of the first fixed plate, the second sealing ring is located below the second fixed plate, and the top of the second sealing ring abuts against the bottom surface of the second fixed plate.

[0008] Further, the first sealing ring and the second sealing ring are consistent in structure.

[0009] The first sealing ring comprises a ring body, and a sealing body is connected to the top of the ring body.

[0010] Further, the ring body and the sealing body are elastically connected.

[0011] Further, a first clamping groove and a second clamping groove are arranged on the outer periphery of the shaft sleeve.

[0012] The ring body is also provided with a ring on the side facing the bushing, the ring of the first sealing ring is inserted into the first groove, and the ring of the second sealing ring is inserted into the second groove.

[0013] Furthermore, the bushing has a central hole and several cooling holes near its bottom, which communicate with the central hole.

[0014] Furthermore, the inner wall of the sealing cover near the top is provided with a first annular mounting step, and the first fixing plate is mounted on the first annular mounting step.

[0015] Furthermore, the inner wall of the sealing cover near the bottom is provided with a second annular mounting step, and the second fixing plate is mounted on the second annular mounting step.

[0016] Furthermore, the first sealing ring and the second sealing ring are corrosion-resistant sealing rings.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model provides a double liquid seal mechanism. The bushing can be stably fixed in the center of the sealing cover by the first fixing plate and the second fixing plate. The first sealing ring and the second sealing ring are respectively set below the first fixing plate and the second fixing plate. The gap between the first fixing plate and the bushing and the gap between the second fixing plate and the bushing are sealed by the double sealing of the first sealing ring and the second sealing ring. The double liquid seal prevents liquid from penetrating into the motor. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0020] Figure 1 This invention provides a schematic diagram of the structure of a double liquid seal mechanism according to an embodiment of the present invention;

[0021] Figure 2 A cross-sectional structural schematic diagram of a double liquid seal mechanism is provided for an embodiment of this utility model;

[0022] Figure 3 An exploded view of a dual liquid seal mechanism is provided in an embodiment of this utility model;

[0023] Figure 4A cross-sectional structural diagram of the sealing cap provided in an embodiment of this utility model.

[0024] In the picture:

[0025] 1. Sealing cap; 11. First annular mounting step; 12. Second annular mounting step; 2. Bushing; 21. Shaft hole; 22. Cooling hole; 23. First slot; 24. Second slot; 3. First fixing plate; 4. Second fixing plate; 5. First sealing ring; 51. Ring body; 52. Sealing body; 53. Ring; 6. Second sealing ring. Detailed Implementation

[0026] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] like Figures 1 to 4 As shown, this utility model embodiment provides a double liquid seal mechanism, including a sealing cover 1, a bushing 2, a first fixing plate 3, a second fixing plate 4, a first sealing ring 5, and a second sealing ring 6. The sealing cover 1 is a hollow structure with the top and bottom connected. The first fixing plate 3 and the second fixing plate 4 are both fixedly disposed on the sealing cover 1, with the second fixing plate 4 located below the first fixing plate 3. The bushing 2 passes through the center of the first fixing plate 3 and the second fixing plate 4, and is fixed on the first fixing plate 3 and the second fixing plate 4. The first sealing ring 5 and the second sealing ring 6 are both sleeved on the bushing 2. The first sealing ring 5 is located below the first fixing plate 3, with its top abutting against the bottom surface of the first fixing plate 3. The second sealing ring 6 is located below the second fixing plate 4, with its top abutting against the bottom surface of the second fixing plate 4.

[0031] This utility model provides a double liquid seal mechanism. The bushing 2 can be stably fixed in the center of the sealing cover 1 by the first fixing plate 3 and the second fixing plate 4. The first sealing ring 5 and the second sealing ring 6 are respectively set below the first fixing plate 3 and the second fixing plate 4. The gap between the first fixing plate 3 and the bushing 2 and the gap between the second fixing plate 4 and the bushing 2 are sealed by the double sealing of the first sealing ring 5 and the second sealing ring 6. The double liquid seal prevents liquid from penetrating into the motor.

[0032] like Figure 2 and 3 As shown, the first sealing ring 5 and the second sealing ring 6 have the same structure; the first sealing ring 5 includes a ring body 51, and a sealing body 52 is connected to the top of the ring body 51. The ring body 51 and the sealing body 52 are elastically connected. Specifically, in this embodiment, during installation, the first fixing plate 3 is installed, the bushing 2 is fixed on the first fixing plate 3, and the first sealing ring 5 is fitted onto the bushing 2. Since the ring body 51 and the sealing body 52 are elastically connected, the sealing body 52 can be pressed downwards towards the first fixing plate 3 to achieve a better sealing effect. After installing the first fixing plate 3 and the first sealing ring 5, the second fixing plate 4 and the second sealing ring 6 are sealed in sequence.

[0033] likeFigure 2 and 3 As shown, the outer periphery of the bushing 2 is provided with a first groove 23 and a second groove 24; the ring body 51 is also provided with a ring 53 on the side facing the bushing 2. The ring 53 of the first sealing ring 5 is engaged in the first groove 23, and the ring 53 of the second sealing ring 6 is engaged in the second groove 24. Specifically, in this embodiment, by providing the first groove 23 and the second groove 24, the first sealing ring 5 and the second sealing ring 6 can be fixedly sleeved on the outside of the bushing 2. At the same time, the cooperation between the groove and the ring 53 can better seal the gap between the bushing 2 and the sealing ring.

[0034] like Figure 2 and 3 As shown, the bushing 2 has a central shaft hole 21, and several cooling holes 22 are located near the bottom of the bushing 2, communicating with the shaft hole 21. Cooling gas can be introduced into the bushing 2 through the cooling holes 22 to lower the temperature and effectively extend the service life of the entire sealing mechanism. It should be noted that the second sealing ring needs to be removed before introducing cold gas.

[0035] like Figure 2 and 3 As shown, the inner wall near the top of the sealing cover 1 is provided with a first annular mounting step 11, and the first fixing plate 3 is mounted on the first annular mounting step 11. Specifically, by providing the first annular mounting step 11, on the one hand, it facilitates the installation of the first fixing plate 3, and on the other hand, a misaligned sealing structure is formed between the first fixing plate 3 and the first annular mounting step 11, which is beneficial for better sealing.

[0036] like Figure 2 and 3 As shown, the inner wall near the bottom of the sealing cover 1 is provided with a second annular mounting step 12, and the second fixing plate 4 is mounted on the second annular mounting step 12. By providing the second annular mounting step 12, on the one hand, it facilitates the installation of the second fixing plate 4, and on the other hand, a staggered sealing structure is formed between the second fixing plate 4 and the second annular mounting step 12, which is conducive to better sealing.

[0037] In some embodiments, the first sealing ring 5 and the second sealing ring 6 are corrosion-resistant sealing rings, such as fluororubber sealing rings, polytetrafluoroethylene sealing rings, or silicone rubber sealing rings.

[0038] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A dual liquid seal sealing mechanism, characterized by, The sealing cover (1), the shaft sleeve (2), the first fixed plate (3), the second fixed plate (4), the first sealing ring (5) and the second sealing ring (6) are included. The sealing cover (1) is a hollow structure with an upper and lower communication, the first fixed plate (3) and the second fixed plate (4) are fixedly arranged on the sealing cover (1), the second fixed plate (4) is located below the first fixed plate (3), the shaft sleeve (2) passes through the center of the first fixed plate (3) and the second fixed plate (4), the shaft sleeve (2) is fixed on the first fixed plate (3) and the second fixed plate (4), the first sealing ring (5) and the second sealing ring (6) are sleeved on the shaft sleeve (2), the first sealing ring (5) is located below the first fixed plate (3), the top of the first sealing ring (5) abuts the bottom surface of the first fixed plate (3), the second sealing ring (6) is located below the second fixed plate (4), the top of the second sealing ring (6) abuts the bottom surface of the second fixed plate (4).

2. The dual liquid seal mechanism of claim 1, wherein, The first sealing ring (5) and the second sealing ring (6) are consistent in structure. The first sealing ring (5) comprises a ring body (51), and a sealing body (52) is connected to the top of the ring body (51).

3. A dual liquid seal sealing mechanism according to claim 2, wherein, The ring body (51) and the sealing body (52) are elastically connected.

4. The dual liquid seal mechanism of claim 3, wherein, The outer periphery of the shaft sleeve (2) is provided with a first clamping groove (23) and a second clamping groove (24). The ring body (51) is further provided with a ring (53) on one side of the shaft sleeve (2), the ring (53) of the first sealing ring (5) is clamped into the first clamping groove (23), and the ring (53) of the second sealing ring (6) is clamped into the second clamping groove (24).

5. A dual liquid seal mechanism according to any one of claims 1 to 4, wherein The center of the shaft sleeve (2) is provided with a shaft hole (21), and the position close to the bottom of the shaft sleeve (2) is provided with a plurality of cooling holes (22) which are communicated with the shaft hole (21).

6. A dual liquid seal mechanism according to any one of claims 1 to 4, wherein The inner wall close to the top of the sealing cover (1) is provided with a first annular mounting step (11), and the first fixed plate (3) is mounted on the first annular mounting step (11).

7. A dual liquid seal mechanism according to any one of claims 1 to 4, wherein The inner wall close to the bottom of the sealing cover (1) is provided with a second annular mounting step (12), and the second fixed plate (4) is mounted on the second annular mounting step (12).

8. The dual liquid seal mechanism of claim 1, wherein, The first sealing ring (5) and the second sealing ring (6) are corrosion-resistant sealing rings.

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