CN220396760U - A device to prevent the limit pipe clamps of the four major vertical pipes of thermal power plants from falling off - Google Patents

Abstract

The utility model provides a device for preventing the four major vertical pipe limit pipe clamps from falling off in a thermal power plant. The utility model includes a support member and a spring hanger. The support member is arranged above the riser limiting pipe clamp. The top end of the spring hanger is connected to the support member. The bottom end of the spring hanger is connected to the riser pipe. The limit pipe clamps are connected. The spring hanger installed in this utility model is integrated with the pipeline, which will not affect the expansion of the pipeline, and also ensures that the displacement of the limit pipe clamp is within the preset range and will not break away from the limit frame, thereby making the limit pipe The clamp will not fail during operation. The modification cost of each pipe clamp is low, saving modification costs.

Description

A device to prevent the limit pipe clamps of the four major vertical pipes of thermal power plants from falling off

Technical field

The utility model relates to the technical field of pipeline installation, and in particular to a device that prevents the vertical pipeline limit clamps of four major pipelines in thermal power plants from falling off.

Background technique

The four major pipelines of thermal power plants include main steam pipelines, hot reheat steam pipelines, cold reheat steam pipelines, and high-pressure water supply pipelines. In order to ensure that the stress of each part of the pipeline is within a safe range during operation, the four major pipelines will limit the displacement of the pipeline in a certain direction during design. Limiting pipe clamps are usually installed on the pipelines, and limiting frames are installed on the surrounding steel beams. The pipe clamps are connected to the pipes. The gap in the limiting frame is used to limit the expansion displacement of the pipeline. The installation of pipe clamps is generally fastened to the pipe by bolts. However, due to the frequent starts and stops of the unit and the action of alternating hot and cold conditions during operation, the pipe clamps installed on the vertical pipes will loosen the bolts and the friction between the pipe clamps and the pipes will decrease. Small, causing the limiting pipe clamp to fall downward. The limit pipe clamp will fail after it comes out of the limit frame. In severe cases, the pipe clamp will be stuck in the adjacent limit frame, blocking the displacement of the pipeline in the designed expansion direction, generating large stress during operation, and posing serious safety risks. Hidden danger.

At present, common methods to solve the above technical problems include the following two methods: 1. Add another pipe clamp below the limit pipe clamp to prevent the limit pipe clamp from falling off by increasing the friction with the pipe. This method cannot completely solve the problem. As the running time increases, the newly added limit pipe clamp still has the risk of sliding down. Moreover, the limit pipe clamp needs to be made of the same material as the pipe to meet the operating temperature requirements, and high-alloy pipe clamps are expensive to manufacture. 2. Weld the limit block on the pipe to prevent the pipe clamp from sliding down. As the running time of the unit increases, the pipeline has a certain displacement, and the limit block may not correspond to the original limit frame. This is also the reason why the limit block is not welded during the pipeline design. In addition, if the limit block is welded on site, the heat treatment effect is poor and the welding quality cannot be guaranteed, which may cause damage to the base metal.

Utility model content

According to the technical problems raised above, a device is provided to prevent the four major vertical pipe limit pipe clamps from falling off in thermal power plants. The technical means adopted by this utility model are as follows:

A device for preventing the limit pipe clamps of the four major vertical pipes of thermal power plants from falling off, including a support member and a spring hanger. The support member is arranged above the riser limit pipe clamp, and the top end of the spring hanger is connected to the spring hanger. The supporting parts are connected, and the bottom end of the spring hanger is connected with the riser limiting pipe clamp.

Further, the number of the spring hangers is at least two.

Further, the spring hanger includes a spring and a first hanger and a second hanger arranged on both sides of the spring. The top of the first hanger is connected to the support member, and the bottom of the second hanger is connected to the support member. The end is connected to the riser limit pipe clamp.

Further, the spring has a preset elasticity, so that the maximum compression displacement of the spring does not exceed the maximum expansion of the pipe between the support member and the riser limiting pipe clamp.

Further, the support member is set at a position 3-6 meters above the riser limit pipe clamp.

Further, the support member includes a pipe clamp of an elastic or rigid hanger, and the pipe clamp is fixed at a preset position through positioning blocks and bolts.

The spring hanger installed in this utility model is integrated with the pipeline, which will not affect the expansion of the pipeline, and also ensures that the sliding displacement of the limit pipe clamp is within the preset range and will not break away from the limit frame, thereby making the limit pipe The clamp will not fail during operation. The modification cost of each pipe clamp is low, saving modification costs.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic structural diagram of the utility model.

In the picture: 1. First boom; 2. Spring; 3. Second boom; 4. Support; 5. Standpipe limit clamp.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the description The embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

As shown in Figure 1, an embodiment of the present utility model discloses a device for preventing the four major vertical pipe limit pipe clamps of a thermal power plant from falling off. It includes a support member 4 and a spring hanger. The support member is arranged on the standpipe limiter. Above the pipe clamp 5, the top end of the spring hanger is connected to the support member, and the bottom end of the spring hanger is connected to the riser limiting pipe clamp.

The number of the spring hangers is at least two.

The spring hanger includes a spring 2 and a first hanger 1 and a second hanger 3 arranged on both sides of the spring. The top of the first hanger is connected to the support member, and the bottom of the second hanger is connected to the support member. The end is connected to the riser limit pipe clamp.

The spring has a preset elasticity, so that the maximum compression displacement of the spring does not exceed the maximum expansion of the pipe between the support member and the riser limiting pipe clamp.

The position of the support member is 3-6 meters above the standpipe limit pipe clamp.

The support member includes a pipe clamp of an elastic or rigid hanger, and the pipe clamp is fixed at a preset position through positioning blocks and bolts.

As an optional implementation, there are elastic or rigid hanger pipe clamps 3-6 meters above each riser limit pipe clamp. These pipe clamps are fixed on the pipeline through positioning blocks and bolts. Falling off may occur. Connect the upper fixed pipe clamp and the lower limiting pipe clamp through the spring hanger of the present invention. According to the relative distance between the two pipe clamps, calculate the maximum expansion value of this section of pipe, select the appropriate spring, and use it during cold installation. The spring is completely relaxed, and when the hot pipe expands and stretches the spring, the maximum compression displacement of the spring is limited to 50mm. The spring hanger installed in this way is integrated with the pipeline, which will not affect the expansion of the pipeline. It also ensures that the downward displacement of the limit pipe clamp is within 50mm and will not break away from the limit frame, thus keeping the limit pipe clamp in operation. Will not fail.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that : It is still possible to modify the technical solutions recorded in the foregoing embodiments, or to equivalently replace some or all of the technical features; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the embodiments of the present invention. Scope of technical solutions.

Claims (6)

1. A device for preventing the limit pipe clamps of the four major vertical pipes of thermal power plants from falling off. It is characterized in that it includes: a support member and a spring hanger. The support member is arranged above the riser limit pipe clamp. The spring The top end of the hanger is connected to the support member, and the bottom end of the spring hanger is connected to the standpipe limiting pipe clamp. 2. The device for preventing the limit pipe clamps of the four major vertical pipes of the thermal power plant from falling off according to claim 1, characterized in that the number of the spring hangers is at least two. 3. The device for preventing the limit pipe clamps of the four major vertical pipelines of the thermal power plant from falling off according to claim 1, characterized in that the spring hanger includes a spring and a first suspender and a second suspender arranged on both sides of the spring. A suspension rod, the top end of the first suspension rod is connected to the support member, and the bottom end of the second suspension rod is connected to the riser limiting pipe clamp. 4. The device for preventing the limit pipe clamps of the four major vertical pipes of thermal power plants from falling off according to claim 1, characterized in that the spring has a preset elasticity so that the maximum compression displacement of the spring does not exceed the support. The maximum expansion of the pipe between the riser clamp and the riser clamp. 5. The device for preventing the limit pipe clamps of the four major vertical pipes of thermal power plants from falling off according to claim 1, characterized in that the support member is set at a position 3-6 meters above the riser limit pipe clamps. 6. The device for preventing the four major vertical pipe limit pipe clamps of the thermal power plant from falling off according to any one of claims 1 to 5, characterized in that the support member includes a pipe clamp of an elastic or rigid hanger, and the The pipe clamp is fixed at the preset position through positioning blocks and bolts.