CN204717214U - The reducible multi-sealed sleeve expansion joint of a kind of thermal insulation layer - Google Patents

Abstract

The utility model relates to a sleeve compensator, in particular to a multi-seal sleeve compensator with resettable insulation layers. The sleeve compensator includes a core tube, one end of the core tube is sealed and plugged into the socket slot at the opposite end of the socket tube, and the socket tube has an outer circular fixed ring-shaped socket tube pressure at one end of the socket slot. cover, the outer wall of the core tube is fixedly connected with a ring-shaped core tube gland and a reset ring plate, the reset ring plate is located between the socket tube gland and the core tube gland, and the socket tube gland and the core tube The glands are connected by screws, the core tube gland is connected with the ring plate outside the core tube by a spring, and the insulation layer is filled between the ring plate and the reset ring plate, and the reset ring plate passes through The sealing bellows is connected with the retaining ring adjacent to the socket gland. Adopting this structure can effectively prevent medium leakage and improve heat preservation efficiency.

Description

A multi-seal sleeve compensator with resettable insulation layer

technical field

The utility model relates to a sleeve compensator, in particular to a multi-seal sleeve compensator with resettable insulation layers.

Background technique

At present, the sleeve compensator adopts packing type seal, the sealing form is single, and the packing is easy to wear, resulting in leakage of the heating medium, which directly affects the large-scale application of the product. It has a greater impact on the insulation layer, and there is currently no better solution for this. After searching, it was found that the existing sleeve compensator (patent number: 201020275186.9) uses graphite packing as the main sealing form, and the sealing effect is good in a short time, but in the process of long-term use, the packing wear caused by axial reciprocating motion cannot be repaired , the sealing performance is greatly reduced. The sleeve compensator prefabricated insulation device (patent number: 201320752808.6) adopts a built-in insulation layer structure with an outer sheath, which reduces the energy consumption loss of the heating medium to a certain extent, but the core tube produces axial displacement after thermal expansion of the insulation layer. It causes the insulation layer to be squeezed, and it is difficult for the insulation layer to restore its original shape after the extrusion force disappears. Because it does not have the ability to reset, it will cause a partial vacancy of the insulation layer and increase the energy consumption of heating medium transportation. Therefore, it is necessary to improve its structure to meet the use requirements of the heating medium delivery pipeline.

Utility model content

The technical problem to be solved by the utility model is to overcome the drawbacks of the prior art and provide a multi-seal sleeve compensator with a resettable insulation layer, which has better sealing performance and uses a built-in insulation layer to prevent the insulation layer from being affected by the outside world. Environmental impact. On the other hand, the resettable structure is adopted to realize that the insulation layer can change its length with the expansion and contraction of the core tube, which ensures the effective area of insulation to the maximum extent and reduces the energy loss of heating medium transportation.

In order to achieve the above purpose, the technical solution of the utility model is as follows: a multi-sealed sleeve compensator with resettable insulation layer, including a core tube, one end of the core tube is sealed and inserted into the socket slot at the opposite end of the socket tube, The socket tube has an outer circular ring-shaped socket tube gland at one end of the socket socket, and the outer wall of the core tube is fixedly connected with the ring-shaped core tube gland and a reset ring plate, and the reset ring plate is located on the bearing Between the intubation gland and the core tube gland, the socket tube gland and the core tube gland are connected by a screw, which is characterized in that the core tube gland is connected outside the core tube by a spring The ring plates are connected, and the insulation layer is filled between the ring plate and the reset ring plate, and the reset ring plate is connected with the retaining ring adjacent to the gland of the intubation tube through the sealing bellows.

Further, the core tube and the socket slot are interference fit through at least one set of sealing rings, and the set of sealing rings is a combination of a sealing ring filled in the groove of the inner wall of the core tube and a sealing ring filled in the groove of the outer wall of the core tube. combination.

Further, the insulation layer and the sealing bellows are covered by an outer sheath, one end of the outer sheath is fixedly connected to the retaining ring, and the other end of the outer sheath is connected to the ring plate.

Further, the ring plate is glued to the insulation layer, and its outer circumference is fixedly connected with the screw rod.

Further, the sealing ring is made of non-metal elastic material and flexible graphite filler.

Further, several clamping devices are distributed on the side of the reset ring plate facing the thermal insulation layer.

Compared with the prior art, the utility model is a multi-seal sleeve compensator with resettable insulation layer, which has the following advantages: 1. It adopts multiple seal structures, which changes the single sealing form of the sleeve compensator in the past; In the form of connection, the flexible graphite filler is radially compressed by the resilience of the elastic non-metallic material to ensure the reliability of the seal. At the same time, the sealing cavity formed by the sealing bellows is used to supplement the sealing performance of the compensator. 2. The thermal insulation reset mechanism is adopted, which changes the previous form of sleeve compensator relying on the outer layer of thermal insulation cotton for thermal insulation, and uses a fully enclosed outer sheath to protect the thermal insulation layer, eliminating the external factors that existed in the previous external thermal insulation If the insulation layer fails, the reset ring plate uses the clamping device arranged in the circumferential direction to reset the insulation layer by stretching and compressing.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model embodiment one;

Fig. 2 is a schematic diagram of the overall structure of Embodiment 1 of the utility model;

Fig. 3 is a structural schematic diagram of a combined sealing ring according to Embodiment 1 of the utility model;

Fig. 4 is a schematic structural diagram of the clamping device on the reset ring plate in Embodiment 1 of the present utility model;

Fig. 5 is a schematic diagram of the distribution of clamping devices in Embodiment 1 of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, a multi-sealed sleeve compensator with a resettable insulation layer includes a core tube 1, one end of the core tube 1 is sealed and inserted into the socket slot 18 at the opposite end of the socket tube 2, and the two Interference fit through at least one set of sealing rings. The socket tube 2 has an outer circular ring-shaped socket tube gland 4 at one end of the socket slot 18, and the outer wall of the core tube 1 is fixedly connected with a ring-shaped core tube gland 3, and the nut 5 and the screw rod 6 are passed between the two. connect. The reset ring plate 8 is located between the socket tube gland 4 and the core tube gland 3 , and its inner circle is fixedly connected with the outer wall of the core tube 1 . The core tube gland 3 is connected with the ring plate 9 outside the core tube 1 through the spring 14, and the insulation layer 12 is filled between the ring plate 9 and the reset ring plate 8, and the reset ring plate 8 is connected to the adjacent socket through the sealing bellows 11. The retaining ring 7 of the pipe gland 4 is engaged. The insulation layer 12 and the sealing bellows 11 are covered by the outer sheath 10 , one end of the outer sheath 10 is fixedly connected with the retaining ring 7 , and the other end is connected with the ring plate 9 . The ring plate 9 is glued to the insulation layer, and its outer circumference is fixedly connected with the screw rod 6 .

As shown in FIG. 3 , a set of sealing rings is a combination of sealing rings filled in the groove 16 on the inner wall of the core tube and sealing rings filled in the groove 15 on the outer wall of the core tube. The sealing ring 13 is made of rubber ring and flexible graphite packing.

As shown in Fig. 4 and Fig. 5, four sets of clamping devices 17 are evenly spaced at 90 degrees on the side of the reset ring plate 8 facing the insulation layer, two in each set. The device is a Y-shaped claw, and self-tightening bolts are fixed between the two claws.

When the pipeline is thermally expanded during work, the core tube 1 and the socket tube 2 move relative to each other, and the two sealing rings 13 arranged on the core tube 1 use the radial compression force of the rubber ring on the flexible graphite to realize the sealing between the core tube 1 and the socket tube 2. The first seal, if the first seal fails, the medium will enter the sealing cavity 19 along the socket slot 18 to realize the second seal, which can fully guarantee the sealing performance of the sleeve compensator. When the pipeline is thermally expanded during work, the core tube 1 moves to drive the reset ring plate 8, and the reset ring plate 8 uses the Y-shaped clamping device to pull the insulation layer 12 to move together with the core tube 1. The insulation layer 12 can effectively cover the working unit and keep the insulation The layer 12 is built between the reset ring plate 8 and the ring plate 9, and it is covered with the outer sheath 10, forming a closed insulation layer between the four, which can effectively prevent the influence of external environmental factors.

In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation all fall within the scope of protection required by the utility model.

Claims (6)

1. A multi-sealed sleeve compensator with resettable insulation layer, comprising a core tube (1), one end of the core tube is sealed and inserted into the socket slot (18) at the opposite end of the socket tube (2), and the The socket tube (2) has an outer circle fixed ring-shaped socket tube gland (4) at one end of the socket slot (18), and the outer wall of the core tube is fixedly connected to the ring-shaped core tube gland (3) and reset Ring plate (8), the reset ring plate is located between the socket tube gland and the core tube gland, and the screw rod (6) is passed between the socket tube gland (4) and the core tube gland (3) Connection, characterized in that: the core tube gland is connected with the ring plate (9) looped outside the core tube through a spring (14), and an insulating layer (12) is filled between the ring plate and the reset ring plate , the reset ring plate is connected with the retaining ring (7) adjacent to the gland of the socket tube through the sealing bellows (11). 2. The multi-seal sleeve compensator with resettable insulation layer according to claim 1, characterized in that: the core tube (1) and the socket slot (18) are interference fit through at least one set of sealing rings , the set of sealing rings is a combination of sealing rings filled in the inner wall groove (16) of the core tube and sealing rings filled in the outer wall groove (15) of the core tube. 3. The multi-seal sleeve compensator with resettable insulation layer according to claim 1, characterized in that: the insulation layer (12) and the sealing bellows (11) are covered by the outer sheath (10), One end of the outer sheath is fixedly connected with the retaining ring (7), and the other end is connected with the ring plate (9). 4. A multi-seal sleeve compensator with resettable insulation layer according to claim 1, characterized in that: the ring plate (9) is bonded to the insulation layer, and its outer circumference is fixed to the screw rod (6) connect. 5. The multi-seal sleeve compensator with resettable insulation layer according to claim 2, characterized in that: the sealing ring (13) is made of non-metallic elastic material and flexible graphite filler. 6. The multi-seal sleeve compensator with resettable insulation layer according to claim 1, characterized in that: the reset ring plate (8) has several clamping devices (17) distributed on the side facing the insulation layer .