CN112431984B - A compensator without internal pressure thrust - Google Patents

Abstract

The invention discloses a compensator without internal pressure thrust, wherein the lower end of a steel pipe is inserted into a first medium flow channel body and is fixed at the bottom of the first medium flow channel body, an outer sleeve is sleeved on the steel pipe, and a heat insulation material layer is arranged on the outer wall of the steel pipe; when the medium runner is in a thermal expansion state, the rotatable screw is meshed with the gear, and the compensator can offset internal pressure thrust, simplify the design of a support and hanger, reduce the using amount of civil engineering structural materials, save investment and increase the safety of a medium runner system.

Description

A compensator without internal pressure thrust

technical field

The invention belongs to the field of fluid conveying pipelines, and relates to a compensator without internal pressure thrust.

Background technique

In almost all industrial production fields such as steel, electric power, building materials, chemicals, non-ferrous metals, etc., the transportation and discharge of fluid media are involved. Most of the medium flow channels use compensators to compensate for thermal expansion. Conventional compensators generally achieve free compensation through non-metallic materials or metal bellows. After the compensator is installed in the pipeline, the elbows at both ends of the medium flow channel will be subjected to the tensile force caused by the medium pressure. At this time, fixed brackets are generally set at both ends of the compensator to balance the internal pressure thrust and prevent the compensator from being pulled apart.

On the one hand, under the background of reducing production capacity in the industrial field, industrial furnaces tend to be large-scale and high-efficiency, so the size of the medium flow channel is also getting larger and larger, and the internal pressure thrust at both ends of the compensator is also increasing. On the other hand, with the popularization and application of the compensator in high pressure occasions, the internal pressure thrust of the compensator is also increasing. The increase of the internal pressure thrust of the compensator leads to an increasing horizontal thrust of the fixed supports and hangers at both ends to the civil structure. Especially for the medium flow channel laid at high altitude, the structural design for bearing the horizontal thrust is more and more complicated, which consumes a lot of steel, and there is a great potential safety hazard.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a compensator without internal pressure thrust, which can offset the internal pressure thrust, simplify the design of the support and hanger, reduce the consumption of civil structure materials, save investment, and at the same time Increase the safety of the media flow channel system.

In order to achieve the above purpose, the compensator without internal pressure thrust according to the present invention is installed on the medium flow channel, and includes steel pipes, rotatable screws, round steel, bearings and gears, and the medium flow channel includes the first medium flow channel body. , the second medium flow channel body and the soft connecting part used to connect the first medium flow channel body and the second medium flow channel body, the lower end of the steel pipe is inserted into the first medium flow channel body and fixed to the first medium flow channel body The bottom of the steel pipe is sleeved with an outer casing, and the outer wall of the steel pipe is provided with a thermal insulation material layer, wherein the thermal insulation material layer is located in the outer casing, the lower end of the round steel is fixed on the body of the second medium flow channel, and the upper end of the steel pipe is bent with The rotatable screw rod is connected, the upper end of the round steel is bent and then sleeved with a gear, wherein a bearing is arranged between the gear and the round steel;

When the medium flow channel is in the state of thermal expansion, the rotatable screw meshes with the gear.

The round steel is welded on the outer wall of the second medium flow channel body or welded on the reinforcing rib on the outer wall of the second medium flow channel body.

The soft connecting parts are metal bellows.

The material of the soft connection part is fabric or skin.

The bottom of the medium flow channel is provided with two fixing brackets, wherein one fixing bracket is fixed to the bottom of the first medium flow channel body, and the other fixing bracket is fixed to the bottom of the second medium flow channel body.

The steel pipe is a seamless steel pipe.

The present invention has the following beneficial effects:

During the specific operation of the compensator without internal pressure thrust according to the present invention, when the medium flow channel is in a cold state, the gear and the rotatable screw are in a state of just disengaging, and when the medium flow channel is put into operation, the temperature of the wall plate begins to rise , the height of the gear is raised due to the thermal expansion of the second medium flow channel body, and the gear and the rotatable screw begin to mesh. Or when the industrial load is reduced, the temperature of the wall plate gradually decreases, contrary to the thermal expansion process, until it is unlocked, so as to realize the self-absorption of the internal pressure thrust by the compensator, without human intervention, offset the internal pressure thrust, simplify the support and hanger design, and reduce the civil structure. Material consumption, saving investment, while increasing the safety of the media flow channel system.

Description of drawings

1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a connection diagram of the gear 6 and the rotatable screw 3 .

Among them, 1 is a soft connection part, 2 is a steel pipe, 3 is a rotatable screw, 4 is a round steel, 5 is a bearing, 6 is a gear, 71 is the first medium flow channel body, 72 is the second medium flow channel body, 8 For the fixed bracket, 9 is the reinforcement rib.

Detailed ways

Below in conjunction with accompanying drawing, the present invention is described in further detail:

1 and 2, the compensator without internal pressure thrust according to the present invention is installed on the medium flow channel, and includes a steel pipe 2, a rotatable screw 3, a round steel 4, a bearing 5 and a gear 6. The medium flow channel It includes a first medium flow channel body 71, a second medium flow channel body 72, and a soft connection part 1 for connecting the first medium flow channel body 71 and the second medium flow channel body 72. The lower end of the steel pipe 2 is inserted into the first medium. Inside the flow channel body 71 and fixed at the bottom of the first medium flow channel body 71, the steel pipe 2 is sleeved with an outer casing, and the outer wall of the steel pipe 2 is provided with a thermal insulation material layer, wherein the thermal insulation material layer is located in the outer casing, and the round steel 4 is provided with a thermal insulation material layer. The lower end is fixed on the second medium flow channel body 72, the upper end of the steel pipe 2 is bent and connected to the rotatable screw 3, and the upper end of the round steel 4 is bent and sleeved with a gear 6, wherein the gear 6 and the round steel 4 are connected. A bearing 5 is arranged between them; when the medium flow channel is in a state of thermal expansion, the rotatable screw 3 is engaged with the gear 6 .

The round steel 4 is welded to the outer wall of the second medium flow channel body 72 or welded to the reinforcement ribs 9 on the outer wall of the second medium flow channel body 72 .

The soft connection part 1 is a metal corrugated pipe, or the material of the soft connection part 1 is fabric or skin, and the steel pipe 2 is a seamless steel pipe.

The bottom of the medium flow channel is provided with two fixing brackets 8 , wherein one fixing bracket 8 is fixed to the bottom of the first medium flow channel body 71 , and the other fixing bracket 8 is fixed to the bottom of the second medium flow channel body 72 .

The concrete working process of the present invention is:

When the medium flow channel is in a cold state, the gear 6 and the rotatable screw 3 are in a state of just disengagement. When the medium flow channel is put into operation, the temperature of the wall plate begins to rise. Due to the thermal expansion of the second medium flow channel body 72, the gear 6 has a height of lifted. The gear 6 starts to mesh with the rotatable screw 3 to realize self-locking start. At this time, the internal pressure thrust of the medium flow channel will be balanced with the frictional force between the gear 6 and the rotatable screw 3 .

When the temperature of the wall plate is further increased, the height of the gear 6 is further increased, and at the same time, it follows the medium flow channel for thermal expansion in the horizontal direction. The gear teeth of the gear 6 have a small upper and a large lower shape, so that the gear 6 and the rotatable screw 3 are further meshed until the maximum operating temperature, and the two are fully meshed. During this period, as the temperature of the medium flow channel fluctuates, the meshing degree of the gear 6 and the rotatable screw 3 changes accordingly, but it is always in a self-locking state.

When the medium flow channel is out of operation or the industrial load is reduced, the temperature of the wall plate gradually decreases, which is opposite to the thermal expansion process. At this time, on the one hand, the gear 6 moves in the direction of the compensator stretching along with the thermal contraction in the horizontal direction of the medium flow channel. On the other hand, with the radial thermal contraction of the medium flow channel, it moves downward, that is, the gear 6 and the rotatable screw 3 are gradually disengaged from the meshing state, until the medium flow channel is completely stopped and even cooled to room temperature, so that the gear 6 and the rotatable screw 3 are completely disconnected. Turning screw 3 just disengaged. During this period, as the temperature of the medium flow channel fluctuates, the meshing degree of the gear 6 and the rotatable screw 3 changes accordingly, but it is always in a self-locking state.

In the specific operation of the present invention, the tooth height and shape of the gear 6 need to be designed, and its height should be consistent with the height difference between thermal expansion and cold contraction on both sides. to match the reduced size.

In actual operation, in general, three groups of the present invention can be installed, which are located on the front side, rear side and top of the medium flow channel respectively; when the size of the medium flow channel is small, only one set needs to be installed on the top of the medium flow channel The present invention is sufficient.

Take a 10m (length) × 15m (width) steel structure frame as an example, assuming the frame height is 50m, after laying a large medium flow channel on the top, considering the size of the flow channel or the large pressure, the horizontal thrust to the top of the frame is 50 tons about. After rough estimation, the total amount of steel structure using the conventional compensator is about 375 tons, but after using the present invention, the total amount of steel structure is 150 tons, the total amount of steel saved is about 225 tons, and the direct economic benefit is more than 2 million yuan. .

Claims (6)

1. A compensator without internal pressure thrust, installed on the medium flow channel, characterized in that it comprises a steel pipe (2), a rotatable screw (3), a round steel (4), a bearing (5) and a gear (6) , the medium flow channel includes a first medium flow channel body (71), a second medium flow channel body (72), and a connection for connecting the first medium flow channel body (71) and the second medium flow channel body (72) The soft connecting component (1), the lower end of the steel pipe (2) is inserted into the first medium flow channel body (71) and fixed to the bottom of the first medium flow channel body (71), and the steel pipe (2) is sleeved with an outer casing The outer wall of the steel pipe (2) is provided with an insulating material layer, wherein the insulating material layer is located in the outer casing, the lower end of the round steel (4) is fixed on the second medium flow channel body (72), and the upper end of the steel pipe (2) is bent and then connected with the rotatable screw (3), the upper end of the round steel (4) is bent and then sleeved with a gear (6), wherein a bearing (5) is arranged between the gear (6) and the round steel (4); When the medium flow channel is in a state of thermal expansion, the rotatable screw (3) is engaged with the gear (6). 2. The compensator without internal pressure thrust according to claim 1, wherein the round steel (4) is welded to the outer wall of the second medium flow channel body (72) or welded to the second medium flow channel body (72). 72) On the reinforcement rib (9) on the outer wall. 3. The compensator without internal pressure thrust according to claim 1, characterized in that, the soft connecting part (1) is a metal bellows. 4. The compensator without internal pressure thrust according to claim 1, characterized in that, the material of the soft connecting part (1) is fabric or skin. 5 . The compensator without internal pressure thrust according to claim 1 , wherein two fixing brackets ( 8 ) are arranged at the bottom of the medium flow channel, wherein one fixing bracket ( 8 ) is fixed to the first medium flow. 6 . The bottom of the channel body (71), and another fixing bracket (8) is fixed on the bottom of the second medium flow channel body (72). 6. The compensator without internal pressure thrust according to claim 1, wherein the steel pipe (2) is a seamless steel pipe.

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