Negative pressure measuring device and vacuum ladle system

Abstract

The utility model provides a negative pressure measuring device and vacuum ladle system relates to aluminum electrolysis technical field, said negative pressure measuring device includes negative pressure measuring instrument and mobile dolly, the negative pressure measuring instrument is installed on the mobile dolly, the negative pressure measuring instrument is used for communicating with vacuum ladle siphon. The negative pressure measuring instrument of the negative pressure measuring device is directly connected with the siphon of the vacuum ladle, a ladle cover of the vacuum ladle does not need to be damaged, and the safe sealing performance of the vacuum ladle is better. Besides, the negative pressure measuring instrument is arranged on the moving trolley, and the moving trolley drives the negative pressure measuring instrument to move, so that one negative pressure measuring device is used for carrying out negative pressure measurement on a plurality of vacuum two-man ladles, a plurality of negative pressure meters do not need to be arranged, and the installation and maintenance cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolysis, in particular to a negative pressure measuring device and a vacuum ladle lifting system. Background Art

[0002] The vacuum ladle is a common turnover equipment in the aluminum metallurgical production process. The vacuum ladle includes a ladle body, a ladle cover, and a siphon and an ejector arranged on the ladle cover. The ejector is used to form a negative pressure inside the ladle body, so that the aluminum liquid can be sucked into the ladle body from the siphon and then discharged, thereby realizing the transportation of high-temperature aluminum liquid. The vacuum ladle needs to be cleaned regularly after being used for a period of time. In order to avoid the aluminum liquid condensing and clogging the siphon due to too low negative pressure in the vacuum ladle, the vacuum ladle needs to be tested and adjusted after cleaning and reassembling.

[0003] In the prior art, a mounting hole is generally provided on the cover of the vacuum ladle, and a negative pressure gauge is inserted into the mounting hole. Then, compressed air is passed to the ejector, and the fast-flowing high-pressure gas generates negative pressure in the ejector. The amount of compressed air introduced is adjusted according to the negative pressure value displayed on the negative pressure gauge until the negative pressure value in the ladle body meets the requirement of siphoning aluminum liquid. This negative pressure measurement method not only requires a mounting hole for installing the negative pressure gauge on the cover of the vacuum ladle, which reduces the safety and sealing performance of the vacuum ladle, but also requires a negative pressure gauge for each vacuum ladle. When there are a large number of vacuum ladle, a large number of negative pressure gauges are required, and the installation and maintenance costs are high. Utility Model Content

[0004] The utility model aims to solve the technical problems that the existing negative pressure measuring device will damage the structure of the vacuum bag itself during installation and has high installation and maintenance costs.

[0005] On the one hand, the utility model provides a negative pressure measuring device, including a negative pressure measuring and moving trolley, wherein the negative pressure measuring instrument is installed on the moving trolley, and the negative pressure measuring instrument is connected to a siphon tube of a vacuum lifting bag.

[0006] Optionally, the negative pressure measuring device further comprises a connecting device, one end of which is connected to the negative pressure measuring instrument, and the other end of which is used to connect to the siphon tube.

[0007] Optionally, the connecting device includes a hollow box and a hose, the box is arranged on the mobile vehicle, the box is respectively connected to the negative pressure measuring instrument and one end of the hose, and the other end of the hose is used to connect to the siphon.

[0008] Optionally, the negative pressure measuring device further comprises a first clamp, the side wall of the box body is provided with an opening, the inner wall of the opening extends outward to form a mounting section, and one end of the hose is sleeved outside the mounting section and clamped by the first clamp;

[0009] And / or, the negative pressure measuring device further comprises a second clamp, and an end of the hose away from the box body is used to be connected to the siphon tube through the second clamp.

[0010] Optionally, the mobile vehicle includes a frame and wheels, the frame includes a plurality of connecting rods, the plurality of connecting rods are cross-arranged to form a frame structure, and the wheels are provided at the bottom of the frame structure.

[0011] Optionally, the frame further includes a first support rod and a second support rod, the first support rod and the second support rod are respectively arranged on two opposite surfaces of the frame structure, and the connecting device is connected between the first support rod and the second support rod.

[0012] Optionally, the first support rod is hollow inside, one end of the first support rod is connected to the connecting device, and the other end of the first support rod extends out of the frame structure and is connected to the negative pressure measuring instrument.

[0013] Optionally, the frame further includes a plurality of adapters, and a plurality of connecting rods are connected to each other through the adapters to form the frame-type structure; the adapter has a plurality of interfaces, each of the interfaces is provided with a first thread, and the end of the connecting rod is provided with a second thread matching the first thread.

[0014] Optionally, the negative pressure measuring instrument is a negative pressure gauge.

[0015] On the other hand, the utility model proposes a vacuum lifting bag system, including multiple vacuum lifting bags and the above-mentioned negative pressure measuring device, the vacuum lifting bag is provided with a siphon tube and an ejector, and the negative pressure measuring device is used to connect with the siphon tube of a target vacuum lifting bag among the multiple vacuum lifting bags.

[0016] Compared with the prior art, the negative pressure measuring device and vacuum bag lifting system of the present invention have at least the following advantages:

[0017] When the vacuum ladle needs to measure the negative pressure value in the ladle body before use, the negative pressure measuring instrument of the negative pressure measuring device is connected to the siphon tube of the vacuum ladle. After that, high-speed compressed air is introduced into the ejector on the vacuum ladle. The compressed air generates negative pressure after slowing down inside the ejector. The gas in the ladle body is led to the ejector, so that negative pressure is formed inside the ladle body to simulate the process of the siphon tube adsorbing aluminum liquid. The negative pressure value displayed on the negative pressure measuring instrument is the negative pressure value in the ladle body. The negative pressure in the ladle body can be measured by observing the value on the negative pressure measuring instrument. The amount of compressed air introduced into the ejector is adjusted to change the negative pressure value in the ladle body until the negative pressure value in the ladle body reaches a preset value (such as 0.4MPa) to ensure the siphon efficiency. Since the negative pressure measuring device is directly connected to the siphon tube, there is no need to damage the cover of the vacuum ladle, and the safety sealing performance of the vacuum ladle is better. In addition, since the negative pressure measuring instrument is set on the mobile trolley, the negative pressure measuring instrument is moved to the vacuum ladle to be measured by the mobile trolley. Therefore, one negative pressure measuring device can be used to measure the negative pressure of multiple vacuum ladle. There is no need to set up multiple negative pressure gauges, and the installation and maintenance costs are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a negative pressure measuring device according to an embodiment of the utility model;

[0019] Figure 2 A schematic structural diagram of the negative pressure measuring device of another embodiment of the utility model from another perspective;

[0020] Figure 3 A schematic structural diagram of the negative pressure measuring device according to another embodiment of the utility model from another perspective;

[0021] Figure 4 This is a structural schematic diagram of the negative pressure measuring device of an embodiment of the utility model from another perspective.

[0022] Description of reference numerals:

[0023] 1. Negative pressure measuring instrument; 2. Mobile trolley; 21. Frame; 211. Connecting rod; 212. First supporting rod; 213. Second supporting rod; 214. Adapter; 22. Wheel; 3. Connecting device; 31. Box; 32. Hose; 4. First clamp; 5. Second clamp. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, it should be noted that in the description of the present invention, it should be noted that the terminology nouns in the various embodiments, such as "upper", "lower", "front", "back" and other words indicating directions, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the components and devices referred to must be operated in accordance with the specific directions and specified operations and methods and structures in the specification. Such directional nouns do not constitute a limitation on the present invention.

[0027] like Figure 1-Figure 4 As shown, a negative pressure measuring device of an embodiment of the utility model comprises a negative pressure measuring instrument 1 and a moving trolley 2, wherein the negative pressure measuring instrument 1 is installed on the moving trolley 2, and the negative pressure measuring instrument 1 is used to be connected to a siphon of a vacuum ladle.

[0028] Specifically, the negative pressure measuring instrument 1 adopts the existing technology, can be directly purchased, has a digital display function, and can directly display the negative pressure value. The mobile vehicle 2 has a walking function and can drive the negative pressure measuring instrument 1 to move.

[0029] The vacuum ladle includes a ladle body, a ladle cover, a siphon tube and an ejector. The ladle body and the ladle cover are installed in coordination. The siphon tube and the ejector are installed on the ladle cover. The siphon tube can be a siphon cast iron pipe. The ejector has three ports: a high-pressure air inlet, a low-pressure air inlet and an exhaust port. The high-pressure air inlet is connected to the air compressor, the low-pressure air inlet is connected to the inside of the ladle body, and the exhaust port is connected to the external environment. When the air compressor is started, the fast-flowing high-pressure air enters the ejector through the high-pressure air inlet, and negative pressure is generated after the air is decelerated in the ejector, so that the gas in the ladle body is sucked into the ejector from the low-pressure air inlet and discharged from the exhaust port. The more gas in the ladle body is sucked out, the greater the negative pressure value in the ladle body.

[0030] In this embodiment, when it is necessary to measure the negative pressure value in the ladle body of the vacuum ladle, the negative pressure measuring instrument 1 of the negative pressure measuring device is connected to the siphon tube of the vacuum ladle, and then compressed air is introduced into the ejector on the vacuum ladle to form a negative pressure inside the ejector, and the gas in the ladle body is introduced to the ejector, so that a negative pressure is formed inside the ladle body to simulate the process of the siphon tube adsorbing aluminum liquid. The negative pressure value displayed on the negative pressure measuring instrument 1 is the negative pressure value in the ladle body. The measurement of the negative pressure in the ladle body can be achieved by observing the value on the negative pressure measuring instrument 1, and the amount of compressed air introduced into the ejector is adjusted to change the negative pressure value in the ladle body until the negative pressure value in the ladle body reaches a preset value (such as 0.4MPa) to ensure the siphon efficiency. Since the negative pressure measuring device is directly connected to the siphon tube, there is no need to destroy the bag cover of the vacuum ladle, thereby making the safety sealing performance of the vacuum ladle better. In addition, since the negative pressure measuring instrument 1 is arranged on the mobile trolley 2, the negative pressure measuring instrument 1 is moved to the vacuum ladle to be measured by the mobile trolley 2, so that the negative pressure measurement of multiple vacuum ladle can be carried out by using one negative pressure measuring device, without setting up multiple negative pressure gauges, and the installation and maintenance cost is low.

[0031] like Figure 1-Figure 4 As shown, optionally, the negative pressure measuring device further comprises a connecting device 3, one end of the connecting device 3 is connected to the negative pressure measuring instrument 1, and the other end of the connecting device 3 is used to connect to the siphon tube.

[0032] Specifically, the connecting device 3 serves to connect the negative pressure measuring instrument 1 and the vacuum ladle, and the connecting device 3 may be composed of a connecting pipe or other structures.

[0033] In this embodiment, by providing the connecting device 3, the negative pressure measuring instrument 1 can measure the vacuum ladle at a long distance, which is more convenient to use and avoids the frequent movement of the mobile trolley 2.

[0034] like Figure 1-Figure 4 As shown, optionally, the connecting device 3 includes a hollow box 31 and a hose 32, the box 31 is arranged on the mobile vehicle 2, the box 31 is respectively connected to the negative pressure measuring instrument 1 and one end of the hose 32, and the other end of the hose 32 is used to connect to the siphon.

[0035] Specifically, the box 31 can be a square sealing structure made of a hard material, which is convenient for fixed installation on the mobile vehicle 2. The box 31 is hollow inside, and the hose 32 can be a stainless steel corrugated hose. The box 31 and the hose 32 are detachably connected and the two are interconnected.

[0036] In this embodiment, the connection device 3 is configured to include a box body 31 and a hose 32 to achieve the connection between the negative pressure measuring instrument 1 and the siphon of the vacuum ladle. The box body 31 and the negative pressure measuring instrument 1 are connected to each other, and both are fixedly mounted on the mobile trolley 2, which is conducive to ensuring the connection stability and airtightness between the two. The hose 32 can be rolled up and stored. When not in use, the hose 32 is separated from the siphon of the corresponding vacuum ladle, and it is rolled up and placed on the mobile trolley 2 to avoid entanglement and interference when the mobile trolley 2 moves.

[0037] like Figure 1-Figure 2 As shown, optionally, the negative pressure measuring device further includes a first clamp 4, the side wall of the box body 31 is provided with an opening, the inner wall of the opening extends outward to form a mounting section, and one end of the hose 32 is sleeved outside the mounting section and clamped by the first clamp 4;

[0038] And / or, the negative pressure measuring device further comprises a second clamp 5 , and one end of the hose 32 away from the box body 31 is used to be connected to the siphon tube through the second clamp 5 .

[0039] In this embodiment, the side wall of the box 31 may be provided with two openings, one of which is used to communicate with the negative pressure measuring instrument 1, and the other opening is used to install the hose 32. The inner wall of the opening for installing the hose 32 is extended outward to form a mounting section, and the hose 32 is sleeved on the mounting section to achieve the coordinated installation of the two. The first clamp 4 may be a stainless steel annular clamp. The first clamp 4 is used to tighten the hose 32 and the mounting section of the box 31, which can improve the sealing between the hose 32 and the box 31 and avoid affecting the siphon effect due to air leakage.

[0040] The second clamp 5 can be a stainless steel annular clamp. After the hose 32 is plugged into the siphon tube, it is tightened by the second clamp 5 to improve the sealing between the hose 32 and the siphon tube and avoid affecting the siphon effect due to air leakage.

[0041] like Figure 1 , Figure 2 and Figure 4 As shown, optionally, the mobile vehicle 2 includes a frame 21 and wheels 22, the frame 21 includes a plurality of connecting rods 211, and the plurality of connecting rods 211 are cross-arranged to form a frame structure, and the wheels 22 are provided at the bottom of the frame structure.

[0042] In this embodiment, the connecting rod 211 can be a hollow galvanized steel pipe with a long service life and corrosion resistance. A plurality of cross-arranged connecting rods 211 are used to form a frame structure to form the main part of the frame 21, which has a simple structure and reliable strength. A wheel 22 can be set at each of the four corners of the bottom of the frame structure. The wheel 22 is a universal wheel to ensure the convenience of the mobile trolley 2. At the same time, it has a self-locking function and can be locked after being moved into place, which is convenient for the disassembly and assembly between the negative pressure measuring instrument 1 and the vacuum lifting bag.

[0043] like Figure 1-Figure 2 As shown, optionally, the frame 21 also includes a first support rod 212 and a second support rod 213, the first support rod 212 and the second support rod 213 are respectively arranged on two opposite surfaces of the frame structure, and the connecting device 3 is connected between the first support rod 212 and the second support rod 213.

[0044] Specifically, the frame-type structure can be a cube structure, and there are a total of sixteen connecting rods 211, twelve of which are respectively arranged at the twelve edges of the cube, and the other four connecting rods 211 include two first connecting rods and two second connecting rods. The two first connecting rods are cross-arranged at the top of the cube, and each end of the two first connecting rods is respectively connected to the four edges of the top, and the two second connecting rods are cross-arranged at the bottom of the cube, and each end of the two second connecting rods is respectively connected to the four edges of the bottom.

[0045] The first support rod 212 and the second support rod 213 are arranged vertically, the first support rod 212 is located above the second support rod 213, the first support rod 212 is connected to the intersection of the two first connecting rods, and the second support rod 213 is connected to the intersection of the two second connecting rods. The box body 31 of the connecting device 3 is connected between the lower end of the first support rod 212 and the upper end of the second support rod 213, that is, the box body 31 is installed in the middle of the frame structure, so as to achieve stable installation of the connecting device 3 on the mobile cart 2, ensuring that the connecting device 3 and the negative pressure measuring instrument 1 will not shake when the mobile cart 2 moves.

[0046] In some other embodiments, the first support rod 212 and the second support rod 213 may be disposed between any two oppositely disposed connection rods 211 .

[0047] like Figure 2 As shown, optionally, the first support rod 212 is hollow inside, one end of the first support rod 212 is connected to the connecting device 3, and the other end of the first support rod 212 extends out of the frame structure and is connected to the negative pressure measuring instrument 1.

[0048] In this embodiment, the first support rod 212 is a hollow rod, the lower end of the first support rod 212 is inserted into the box body 31 to communicate with the box body 31, the upper end of the first support rod 212 extends out of the frame structure and communicates with the negative pressure measuring instrument 1, the negative pressure measuring instrument 1 is located outside the frame structure, which is convenient for observing the value on the negative pressure measuring instrument 1, and the middle part of the first support rod 212 is connected to the intersection of the two first connecting rods. The first support rod 212 not only plays the role of supporting the connecting device 3, but also plays the role of connecting the negative pressure measuring instrument 1 with the connecting device 3. There is no need to set an additional connecting hole on the box body 31 to connect the negative pressure measuring instrument 1, and the structure is simpler.

[0049] Optionally, the frame 21 also includes a plurality of adapters 214, and the plurality of connecting rods 211 are interconnected through the adapters 214 to form the frame structure; the adapters 214 have a plurality of interfaces, each of which is provided with a first thread, and the end of the connecting rod 211 is provided with a second thread matching the first thread.

[0050] Specifically, the adapter 214 can be a galvanized joint. The number of the adapter 214 and the intersection is consistent. The sixteen connecting rods 211 are cross-arranged to form a total of sixteen intersections. There are sixteen adapters 214. The sixteen adapters may include eight three-dimensional three-way joints, eight plane three-way joints, one five-way joint and one six-way joint. Among them, the eight corners of the frame structure are respectively provided with a three-dimensional three-way joint, the intersection of the first connecting rod at the top and the corresponding connecting rod is respectively provided with a plane three-way joint, the intersection of the second connecting rod at the bottom and the corresponding connecting rod is respectively provided with a plane three-way joint, the intersection of the first support rod 212 and the two first connecting rods is provided with a six-way joint, and the intersection of the second support rod 213 and the two second connecting rods is provided with a five-way joint.

[0051] The three-way joint mentioned above means that the adapter 214 has three interfaces, and the meanings of the five-way joint and the six-way joint are similar. By setting a first thread on each interface of the adapter 214 and setting a second thread on both ends of the connecting rod 211, the ends of each connecting rod 211 at the same intersection are respectively inserted into different interfaces of the corresponding adapter 214 and screwed and fastened, so as to realize the splicing and assembly between the connecting rods 211.

[0052] In some other embodiments, the intersections of the connecting rods 211 may also be directly connected by mortise and tenon joints.

[0053] Optionally, the negative pressure measuring instrument 1 is a negative pressure gauge.

[0054] In this embodiment, the negative pressure measuring instrument 1 adopts a negative pressure gauge, which can intuitively display the measurement data, has a simple structure, is easy to operate, and has high reliability.

[0055] Another embodiment of the utility model provides a vacuum ladle system, including multiple vacuum ladle and the above-mentioned negative pressure measuring device, wherein the vacuum ladle is provided with a siphon tube and an ejector, and the negative pressure measuring device is used to communicate with the siphon tube of a target vacuum ladle among the multiple vacuum ladle. When a vacuum ladle needs to measure the negative pressure value in the ladle body before use, the negative pressure measuring instrument 1 of the negative pressure measuring device is connected with the siphon tube of the target vacuum ladle, and then, compressed air is passed to the ejector on the target vacuum ladle to form a negative pressure inside the ejector, and the gas in the ladle body is led to the ejector, so that a negative pressure is formed inside the ladle body to simulate the process of the siphon tube adsorbing aluminum liquid. The negative pressure value displayed on the negative pressure measuring instrument 1 is the negative pressure value in the ladle body. The measurement of the negative pressure in the ladle body can be achieved by observing the value on the negative pressure measuring instrument 1. After that, the amount of compressed air passed into the ejector can be adjusted until the negative pressure value in the ladle body reaches a preset value to ensure the siphon efficiency. Next, the mobile trolley 2 moves with the negative pressure measuring instrument 1, so that the negative pressure measuring instrument 1 is connected to the siphon tubes of other vacuum ladle, and the above process is repeated until the negative pressure detection and adjustment of each vacuum ladle is completed. Since the negative pressure measuring device is directly connected to the siphon tube, there is no need to damage the bag cover of the vacuum ladle, the safety sealing performance of the vacuum ladle is better, and only one negative pressure measuring device is needed to measure the negative pressure of multiple vacuum ladle, without setting up multiple negative pressure gauges, and the installation and maintenance costs are low.

[0056] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A negative pressure measuring device, characterized in that: It comprises a negative pressure measuring instrument (1) and a moving trolley (2), wherein the negative pressure measuring instrument (1) is installed on the moving trolley (2), and the negative pressure measuring instrument (1) is used to be connected to a siphon pipe of a vacuum ladle.

2. The negative pressure measuring device according to claim 1, characterized in that: It also comprises a connecting device (3), one end of which is connected to the negative pressure measuring instrument (1), and the other end of which is used to connect to the siphon tube.

3. The negative pressure measuring device according to claim 2, characterized in that: The connecting device (3) comprises a hollow box (31) and a hose (32); the box (31) is arranged on the mobile vehicle (2); the box (31) is respectively connected to the negative pressure measuring instrument (1) and one end of the hose (32); the other end of the hose (32) is used to connect to the siphon.

4. The negative pressure measuring device according to claim 3, characterized in that: It also includes a first clamp (4), the side wall of the box body (31) is provided with an opening, the inner wall of the opening extends outward to form a mounting section, and one end of the hose (32) is sleeved outside the mounting section and clamped by the first clamp (4); And / or, it further comprises a second clamp (5), and one end of the hose (32) away from the box (31) is used to be connected to the siphon tube through the second clamp (5).

5. The negative pressure measuring device according to claim 2, characterized in that: The mobile vehicle (2) comprises a vehicle frame (21) and wheels (22); the vehicle frame (21) comprises a plurality of connecting rods (211); the plurality of connecting rods (211) are cross-arranged to form a frame structure; the wheels (22) are arranged at the bottom of the frame structure.

6. The negative pressure measuring device according to claim 5, characterized in that: The frame (21) further comprises a first support rod (212) and a second support rod (213), wherein the first support rod (212) and the second support rod (213) are respectively arranged on two opposite surfaces of the frame structure, and the connecting device (3) is connected between the first support rod (212) and the second support rod (213).

7. The negative pressure measuring device according to claim 6, characterized in that: The first support rod (212) is hollow inside, one end of the first support rod (212) is connected to the connecting device (3), and the other end of the first support rod (212) extends out of the frame structure and is connected to the negative pressure measuring instrument (1).

8. The negative pressure measuring device according to claim 5, characterized in that: The vehicle frame (21) further comprises a plurality of adapters (214), and a plurality of the connecting rods (211) are connected to each other through the adapters (214) to form the frame-type structure; the adapters (214) have a plurality of interfaces, each of the interfaces is provided with a first thread, and the end of the connecting rod (211) is provided with a second thread matching the first thread.

9. The negative pressure measuring device according to claim 1, characterized in that: The negative pressure measuring instrument (1) is a negative pressure gauge.

10. A vacuum ladle lifting system, characterized in that: It comprises a plurality of vacuum bags and a negative pressure measuring device as claimed in any one of claims 1 to 9, wherein a siphon is provided on the vacuum bag, and the negative pressure measuring device is used to be connected to the siphon of a target vacuum bag among the plurality of vacuum bags.

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