CN220017334U - A water level detection structure for steam boilers - Google Patents

Abstract

The utility model discloses a water level detection structure of a steam boiler, which comprises: a furnace body. The floating body is arranged in the furnace body and is used for floating up and down along with the height of the liquid level in the furnace body. The sliding rod is sleeved with the furnace body top in a sliding way, and the bottom end of the sliding rod is fixedly connected with the floating body. The distance measuring sensor is arranged on the top wall of the furnace body and used for detecting the distance between the floating body and the distance measuring sensor. The pump body is electrically connected with the ranging sensor, is connected with the furnace body through a pipeline and is used for supplementing water to the inside of the furnace body. When the steam boiler is used, the distance of the floating body in the communicating cylinder is measured through the distance measuring sensor to measure the water level of the boiler cylinder, but after the steam boiler is used for a long time, a large amount of scale can be generated, the scale can only accumulate on the bottom surface of the floating body, the lifting movement of the floating body is not blocked, and therefore the water level height can be accurately detected.

Description

A water level detection structure for steam boilers

Technical field

The utility model relates to the technical field of boiler equipment, and in particular to a water level detection structure of a steam boiler.

Background technique

Steam boilers refer to boiler equipment that produces steam. They are special equipment. Their design, production, delivery, and installation must be inspected by the national technical supervision department. Users need to obtain a boiler usage certificate to operate the boiler. Different from normal pressure boilers, steam boilers must have boiler procedures when leaving the factory. Boiler procedures include boiler body diagrams, installation diagrams, instrument valve diagrams, piping diagrams and inspection certificates, etc.

Chinese patent application number: 202223289748.7 discloses an automatic water replenishment steam boiler, including a furnace body, a water level detection device, an electronic control valve, an electronic control water pump, a water storage tank and a water replenishment pipeline. The furnace body is provided with a drum for storing boiler water. , the water level detection device is used to detect the water level in the drum, the water level detection device is electrically connected to the electronically controlled valve and the electronically controlled water pump respectively, and the drum is connected to all locations through the water supply pipe. In the water storage tank, the water supply pipe is provided with the electronically controlled valve and the electronically controlled water pump, and the electronically controlled water pump can transport the boiler water in the water storage tank into the drum. The automatic water replenishing steam boiler described in the utility model can automatically replenish water to the steam boiler according to the water level. The specific steps in use are: the communicating drum and the drum form a communicating device, the water level in the communicating drum is the same as the water level in the drum, and the ranging sensor located on the top of the communicating drum measures The water level of the drum can be measured from the distance between the floating body in the communicating drum. The distance sensor is electrically connected to the electronically controlled valve and the electronically controlled water pump, and can be controlled according to the measured water level. The electronically controlled valve and the electronically controlled water pump (not involving software control): When it is detected that the water level drops to a specified height, the electronically controlled valve opens, the electronically controlled water pump starts, and the electronically controlled water pump pumps water into the water storage tank. Boiler water is transported into the drum through the water supply pipe. When it is detected that the water level rises to a specified height, the electronically controlled valve and the electronically controlled water pump are closed to complete the boiler water replenishment operation.

Regarding the above-mentioned related technologies, when using the steam boiler, the water level of the drum is measured by measuring the distance of the floating body in the communicating drum through the distance measuring sensor. However, after long-term use of the steam boiler, a large amount of water will be generated. The scale will adhere to the inner wall of the communication tube and the surface of the floating body, causing the floating body to be unable to move up and down suddenly, resulting in the inability to correctly detect the water level.

Utility model content

In view of the above technical problems, the present utility model provides a water level detection structure for a steam boiler, including:

Furnace body.

The floating body is located in the furnace body and used to float up and down according to the liquid level in the furnace body.

The sliding rod is slidably connected to the top of the furnace body, and the bottom end is fixedly connected to the floating body.

The ranging sensor is installed on the top wall of the furnace body and is used to detect the distance between the floating body and the ranging sensor.

The pump body is electrically connected to the distance sensor and connected to the furnace body through pipelines, and is used to replenish water inside the furnace body.

Compared with the existing technology, the utility model has the following advantages: as the liquid level of the water surface in the boiler decreases, the height of the floating body decreases, and the ranging sensor detects the distance between itself and the floating body. When the distance increases to the first predetermined When setting the value, the pump body automatically starts working, and the pump body transports water to the furnace body. As the water level in the furnace body rises, the height of the floating body rises. At this time, the distance sensor detects that the distance between the floating body and itself decreases. When the distance reduces to the second preset value, the pump automatically stops working. During the lifting process, the sliding rod slides relative to the top wall of the furnace body, and scale only accumulates on the surface of the floating body, not on the sliding rod, so that the water level can be accurately detected.

Further preferably, it also includes:

The rollers are rotatably connected to the furnace body, and their edges are in contact with the sliding rods. There are multiple rollers, and the plurality of rollers are distributed in a circular array on the side walls of the sliding rods.

Using the above technical solution, the roller can reduce the friction between the sliding rod and the furnace body and improve the sensitivity of the floating body lifting.

Further preferably, it also includes:

The slide block is rotatably connected with the roller and slidingly connected with the furnace body. The sliding direction is close to or away from the slide rod.

The elastic member has one end connected to the slide block and the other end connected to the furnace body, and is used to exert force on the slide block so that the slide block drives the roller to contact the slide rod.

Using the above technical solution, when the sliding rod rocks in the furnace body, it will exert force on the roller. This force is transmitted to the elastic part through the slider, causing the elastic part to deform. At the same time, the elastic part exerts reverse force in the form of reaction force. The slide block is transferred to the slide rod through the roller to buffer the shaking of the slide rod and ensure that the slide rod can be in a stable state during the lifting process.

Further preferably, it also includes:

The card slot is located on the top wall of the furnace body and is used to embed the floating body.

The scraper is slidingly connected to the furnace body.

The driving device is connected with the scraper drive and is used to drive the scraper to slide.

Using the above technical solution, the sliding rod is pulled upward so that the floating body is embedded in the slot. The slot fixes the floating body. The driving device drives the scraper to move. The scraper scrapes off the scale at the bottom of the floating body, thereby reducing the mass of the floating body and improving the lifting efficiency of the floating body. sensitivity.

Further preferably, the driving device includes:

The rack is fixedly connected to the scraper, and its length is along the sliding direction of the scraper.

The gear is rotatably connected to the furnace body and meshes with the rack.

The drive assembly is connected to the gear drive and is used to drive the gear to rotate.

Using the above technical solution, the driving assembly drives the gear to rotate, the gear drives the rack to slide, and the rack drives the scraper to move.

Further preferably, the driving assembly includes:

The worm gear is fixedly connected coaxially with the gear.

The worm is rotatably connected to the furnace body and meshes with the worm gear.

The driving part is connected to the worm drive and is used to drive the worm to rotate.

Using the above technical solution, the driving part drives the worm to rotate, the worm drives the worm gear to rotate, and the worm gear drives the gear to rotate. The worm gear and the worm cooperate to have a self-locking effect, which can prevent the scraper from moving by itself under the action of steam.

It is further preferred that a handle is fixedly connected to one end of the sliding rod away from the floating body for holding.

Using the above technical solution, the handle is easy to hold and pulls the sliding rod to drive the floating body to move up and down.

It is further preferred that a sealing strip is provided between the sliding rod and the furnace body.

Using the above technical solution, the sealing strip can improve the sealing performance of the furnace body and maintain the pressure in the furnace body.

It is further preferred that an anti-collision block is fixedly installed on the side of the floating body close to the top wall of the furnace body.

Using the above technical solution, the anti-collision block prevents the floating body from being damaged by collision with the top of the furnace body.

It is further preferred that the sliding rod surface is coated with a wear-resistant coating.

The above technical solution is adopted to improve the service life of the sliding rod.

Description of the drawings

Figure 1 is a schematic structural diagram of this embodiment;

Figure 2 is a partial enlarged view of position A in Figure 1;

Figure 3 is a partial enlarged view of B in Figure 1;

Reference signs: 1-furnace body; 2-floating body; 3-sliding rod; 4-distance sensor; 5-pump body; 6-roller; 7-sliding block; 8-elastic member; 9-slot; 10- Scraper; 11-rack; 12-gear; 13-worm wheel; 14-worm; 15-driving part; 16-handle; 17-sealing strip; 18-anti-collision block.

Detailed ways

When the boiler in the prior art is used, the distance of the floating body in the communicating drum is measured by the distance measuring sensor to measure the water level of the drum. However, after long-term use of the steam boiler, a large amount of scale will be generated. It will adhere to the inner wall of the connecting tube and the surface of the floating body, causing the floating body to suddenly be unable to move up and down, resulting in the inability to correctly detect the water level.

Based on the above technical problems, the applicant developed the following technical solutions:

The floating body is only in contact with the water surface inside the furnace body, and scale can only accumulate on the surface of the floating body without affecting the up and down movement of the floating body.

Based on the above concept, the present utility model introduces the technical solution in conjunction with Figures 1-3, as follows:

A water level detection structure for a steam boiler, as shown in Figures 1, 2 and 3, includes: a furnace body 1. The floating body 2 is located in the furnace body 1 and is used to float up and down according to the liquid level in the furnace body 1. The sliding rod 3 is slidably connected to the top of the furnace body 1, and the bottom end is fixedly connected to the floating body 2. The distance sensor 4 is installed on the top wall of the furnace body 1 and is used to detect the distance between the floating body 2 and itself. The larger the distance is, the lower the liquid level in the furnace body 1 is. The smaller the distance is, the higher the liquid level is in the furnace body 1 . The pump body 5 is electrically connected to the distance sensor 4 and connected to the furnace body 1 through pipelines, and is used to replenish water inside the furnace body 1 to increase the water level in the furnace body 1 . During the use of the boiler, as the liquid level of the water surface in the furnace body 1 decreases, the height of the floating body 2 also decreases. The distance sensor 4 detects that the distance between the floating body 2 and itself increases. When the distance increases to the first preset When the value is reached, the distance sensor 4 transmits the distance to the controller in the pump body 5 in the form of an electrical signal. The controller controls the pump body 5 to automatically start working. The pump body 5 transports water to the furnace body 1. As the furnace body The water level in 1 rises, and the height of the floating body 2 rises accordingly. During this period, the distance detected by the distance sensor 4 gradually decreases. When the distance decreases to the second preset value, the distance sensor 4 transmits the distance at this time as an electrical signal. The form is transmitted to the controller in the pump body 5, and the controller controls the pump body 5 to automatically stop working. During the lifting process of the floating body 2, the floating body 2 drives the sliding rod 3 to slide relative to the top wall of the furnace body 1. In the furnace body 1, the bottom of the floating body 2 is in direct contact with the water surface, and the sliding rod 3 is not in contact with the water surface. When scale is generated, the scale will only accumulate on the bottom surface of the floating body 2 and will not accumulate on the side walls of the sliding rod 3. Therefore, it will not hinder the lifting movement of the floating body 2, so that the water level can be accurately detected.

Specifically, as shown in Figures 1, 2 and 3, it also includes: rollers 6, which are rotationally connected to the furnace body 1, and the edges are in contact with the sliding rods 3. There are multiple rollers 6 distributed in a circumferential array. On the side wall around the sliding rod 3, the sliding rod 3 forms an opposite rolling motion with the roller 6 during the lifting process, thereby reducing the friction between the sliding rod 3 and the furnace body 1, so that the sliding rod 3 can move in the furnace. The smooth movement in the body 1 enables the floating body 2 to move up and down quickly, thereby improving the lifting sensitivity of the floating body 2.

Specifically, as shown in Figures 1, 2 and 3, it also includes: a slider 7, which is rotatably connected to the roller 6, and slidingly connected to the furnace body 1, and the sliding direction is close to or away from the slide bar 3. The elastic member 8 has one end connected to the slide block 7 and the other end connected to the furnace body 1 for exerting force on the slide block 7 so that the slide block 7 drives the roller 6 to contact the slide rod 3 . When the sliding rod 3 rocks in the furnace body 1, it will exert a force on the roller 6. This force is transmitted to the elastic member 8 through the slider 7, causing the elastic member 8 to deform. At the same time, the elastic member 8 reacts in the form of a reaction force. The force applied to the slider 7 is transmitted to the slider 3 through the roller 6 through the slider 7, thereby buffering the shaking of the slider 3 and ensuring that the slider 3 can be in a stable state during the lifting process.

Specifically, as shown in Figures 1, 2 and 3, it also includes: a clamping slot 9, which is provided on the top wall of the furnace body 1 and is used to embed the floating body 2. The scraper 10 is slidingly connected to the furnace body 1. The driving device is drivingly connected with the scraper 10 and is used to drive the scraper 10 to slide. Pull the sliding rod 3 upward to make the floating body 2 embedded in the slot 9. The slot 9 fixes the floating body 2, and the driving device drives the scraper 10 to move. The scraper 10 scrapes off the scale at the bottom of the floating body 2, reducing the mass of the floating body 2. Improve the sensitivity of floating body 2 lifting.

Specifically, as shown in Figures 1, 2 and 3, the driving device includes a rack 11, which is fixedly connected to the scraper 10, and the length direction is along the sliding direction of the scraper 10. The gear 12 is rotatably connected to the furnace body 1 and meshes with the rack 11. The driving component is drivingly connected to the gear 12 and is used to drive the gear 12 to rotate. The driving assembly drives the gear 12 to rotate, the gear 12 drives the rack 11 to slide, and the rack 11 drives the scraper 10 to move.

Specifically, as shown in Figures 1, 2 and 3, the driving assembly includes: a worm gear 13, which is coaxially and fixedly connected to the gear 12. The worm 14 is rotatably connected with the furnace body 1 and meshes with the worm gear 13 . The driving member 15 is drivingly connected with the worm 14 and is used to drive the worm 14 to rotate. The driving member 15 drives the worm 14 to rotate, the worm 14 drives the worm gear 13 to rotate, and the worm gear 13 drives the gear 12 to rotate. The worm gear 13 and the worm 14 cooperate to have a self-locking effect, which can prevent the scraper 10 from moving by itself under the action of steam.

Specifically, as shown in Figures 1, 2 and 3, a handle 16 is fixedly connected to the end of the sliding rod 3 away from the floating body 2 for holding. The handle 16 is convenient for holding and pulling the sliding rod 3 to drive the floating body 2 to move up and down.

Specifically, as shown in Figures 1, 2 and 3, a sealing strip 17 is provided between the sliding rod 3 and the furnace body 1. The sealing strip 17 can improve the sealing performance of the furnace body 1 and maintain the pressure inside the furnace body 1 .

Specifically, as shown in Figures 1, 2 and 3, an anti-collision block 18 is fixedly installed on the side of the floating body 2 close to the top wall of the furnace body 1. The anti-collision block 18 prevents the floating body 2 from colliding with the top of the furnace body 1 from damage.

Specifically, as shown in Figures 1, 2 and 3, the surface of the sliding rod 3 is coated with a wear-resistant coating. Improve the service life of slide rod 3.

Working principle and process

Please describe in detail the principle process of the present invention as follows in conjunction with Figures 1-3:

When the boiler is in use, as the liquid level of the water surface in the boiler decreases, the height of the floating body 2 decreases. The distance sensor 4 detects the distance between itself and the floating body 2. When the distance increases to the first preset value, the pump body 5 automatically starts working, and the pump body 5 delivers water to the furnace body 1. As the water level in the furnace body 1 rises, the height of the floating body 2 rises. At this time, the distance sensor 4 detects that the distance between the floating body 1 and itself decreases. When the distance reduces to the second preset value, the pump body 5 Automatically stops working. During the lifting process of the floating body 2, the sliding rod 3 slides relative to the top wall of the furnace body 1. In the furnace body 1, the bottom of the floating body 2 is in direct contact with the water surface, and scale accumulates on the surface of the floating body 2. When scale accumulates on the bottom surface of the floating body 2, pull the sliding rod 3 upward so that the floating body 2 is embedded in the slot 9. The slot 9 fixes the floating body 2. The driving device drives the scraper 10 to move. The scraper 10 scrapes the scale on the bottom of the floating body 2. In addition, the mass of the floating body 2 is reduced, and the sensitivity of the lifting and lowering of the floating body 2 is improved, so that the water level height can be correctly detected.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. Those skilled in the art can make modifications to this embodiment without creative contribution as needed after reading this specification. However, as long as the utility model is used in this application, All new types of products are protected by patent law.

Claims (10)

1. A water level detecting structure of a steam boiler, comprising:

a furnace body (1);

the floating body (2) is arranged in the furnace body (1) and is used for floating up and down along with the height of the liquid level in the furnace body (1);

the sliding rod (3) is in sliding sleeve connection with the top of the furnace body (1), and the bottom of the sliding rod is fixedly connected with the floating body (2);

the distance measuring sensor (4) is arranged on the top wall of the furnace body (1) and is used for detecting the distance between the floating body (2) and the sensor;

the pump body (5) is electrically connected with the distance measuring sensor (4), is connected with the furnace body (1) through a pipeline and is used for supplementing water into the furnace body (1).

2. The water level detecting structure of a steam boiler according to claim 1, further comprising:

the rollers (6) are rotationally connected with the furnace body (1), the edges of the rollers are abutted with the sliding rods (3), the number of the rollers is multiple, and the rollers (6) are distributed on the side walls of the sliding rods (3) in a circumferential array.

3. The water level detecting structure of a steam boiler according to claim 2, further comprising:

the sliding block (7) is rotationally connected with the roller (6), is in sliding connection with the furnace body (1), and is close to or far away from the sliding rod (3) in the sliding direction;

and one end of the elastic piece (8) is connected with the sliding block (7), and the other end of the elastic piece is connected with the furnace body (1) and is used for applying acting force to the sliding block (7) so that the sliding block (7) drives the roller (6) to be abutted with the sliding rod (3).

4. The water level detecting structure of a steam boiler according to claim 1, further comprising:

the clamping groove (9) is arranged on the top wall of the furnace body (1) and is used for embedding the floating body (2);

the scraper (10) is connected with the furnace body (1) in a sliding manner;

and the driving device is in driving connection with the scraper (10) and is used for driving the scraper (10) to slide.

5. The water level detecting structure of a steam boiler according to claim 4, wherein the driving means comprises:

the rack (11) is fixedly connected with the scraper (10), and the length direction of the rack is along the sliding direction of the scraper (10);

the gear (12) is rotationally connected with the furnace body (1) and meshed with the rack (11);

and the driving assembly is in driving connection with the gear (12) and is used for driving the gear (12) to rotate.

6. The water level detecting structure of a steam boiler according to claim 5, wherein the driving assembly comprises:

a worm wheel (13) which is coaxially and fixedly connected with the gear (12);

a worm (14) which is rotationally connected with the furnace body (1) and meshed with the worm wheel (13);

and the driving piece (15) is in driving connection with the worm (14) and is used for driving the worm (14) to rotate.

7. The water level detection structure of a steam boiler according to claim 6, wherein a handle (16) is fixedly connected to one end of the sliding rod (3) far away from the floating body (2) for holding.

8. The water level detection structure of a steam boiler according to claim 6, wherein a sealing strip (17) is arranged between the sliding rod (3) and the boiler body (1).

9. The water level detecting structure of a steam boiler according to claim 6, wherein an anti-collision block (18) is fixedly installed on one side of the floating body (2) close to the top wall of the boiler body (1).

10. A water level detecting structure of a steam boiler according to claim 6, characterized in that the surface of the slide bar (3) is coated with a wear-resistant coating.