Electrode bar anti-breakdown mounting structure of immersed electrode boiler

Abstract

The invention discloses an immersed electrode boiler electrode bar anti-breakdown installation structure which comprises a boiler body and three electrode bars, the three electrode bars are installed in the boiler body, and a water inlet and a water outlet are formed in the boiler body. The electrode bar comprises a conducting rod, an electrode tip, an auxiliary block, an end cover, a flange plate, a connecting ring plate, a first flexible protection sleeve, a rigid protection sleeve, a second flexible protection sleeve and a plurality of sealing gaskets, the auxiliary block is arranged at one end of the conducting rod, and the first flexible protection sleeve and the second flexible protection sleeve are arranged at the two ends of the rigid protection sleeve respectively. The flange plate is located between the first flexible protection sleeve and the rigid protection sleeve, the connecting ring plate is arranged between the rigid protection sleeve and the second flexible protection sleeve, and a sealing gasket is arranged between the auxiliary block and the second flexible protection sleeve. And the probability that the conductive rod breaks down the protective shell is reduced.

Description

Technical Field

[0001] The invention relates to the field of electronic product accessories, and in particular to an anti-breakdown installation structure for electrode rods of immersed electrode boilers. Background Art

[0002] The structure of the current electrode boiler is shown in the patent disclosure document CN110375286A. The boiler of this structure includes a boiler furnace body and three electrode rods. The current structure of the electrode rod is shown in the patent document CN110068001B. However, there is a problem when using the electrode rod in any structure, that is, the electrode rod will generate a lot of heat from the inside to the outside when it is powered on, and the electrode rod is composed of some insulating materials (such as a protective sleeve made of ceramic, and an inner insulating sleeve made of rubber or silicone). If the heat of the electrode rod is not dissipated from the surface for a long time, the insulating material and sealing material of the electrode rod will be deformed due to thermal expansion and contraction, resulting in water leakage, and the insulation strength of the insulating material will also decrease during the temperature rise (that is, thermal breakdown occurs).

[0003] Similarly, as shown in patent publication CN110068001B, some chemical conductive media and water seepage will remain inside the electrode rod during the assembly process. These chemical conductive media and water seepage will pierce the insulating protective layer of the electrode rod when conducting electricity (the above process is electrochemical breakdown).

[0004] At the same time, since the electrode boiler uses three-phase electricity for power supply, the instantaneous overvoltage of the power supply grid will also cause the insulation protection layer of the electrode rod to be broken down, which is called electrical breakdown.

[0005] In order to avoid the above three situations when the electrode boiler is working, the patent publication CN115307304A discloses an anti-breakdown design structure for the electrode rod of the electrode boiler. The design structure reduces the probability of breakdown due to power grid reasons by combining various sensors. However, the structure disclosed in the document only uses vacuum impregnation treatment for the electrode rod. As the use time increases, the seal at the gap of the electrode rod will still be damaged, resulting in the occurrence of breakdown. Summary of the invention

[0006] In view of the above problems, the present invention proposes an anti-breakdown installation structure for electrode rods of immersed electrode boilers. The presence of the sealing gasket improves the sealing performance, ensures the sealing integrity of the protective shell, plays a good protective role for the conductive rods located in the protective shell, and reduces the probability of the conductive rods penetrating the protective shell.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An anti-breakdown installation structure for electrode rods of an immersed electrode boiler, comprising a boiler furnace body and electrode rods, wherein the electrode rods are three (i.e., three phases), and the three electrode rods are installed in the boiler furnace body, and the boiler furnace body is provided with a water inlet and a water outlet, and is characterized in that the electrode rod comprises a conductive rod, an electrode head, an auxiliary block, an end cover, a flange, a connecting ring plate, a first flexible protective sleeve, a rigid protective sleeve, a second flexible protective sleeve, and a plurality of sealing gaskets, the electrode head is arranged at one end of the conductive rod, the auxiliary block is arranged at one end of the conductive rod, the first flexible protective sleeve and the second flexible protective sleeve are respectively arranged at both ends of the rigid protective sleeve, The flange is located between the first flexible protective sleeve and the rigid protective sleeve, the connecting ring plate is arranged between the rigid protective sleeve and the second flexible protective sleeve, a sealing gasket is arranged between the auxiliary block and the second flexible protective sleeve, a sealing gasket is arranged between the connecting ring plate and the rigid protective sleeve and the second flexible protective sleeve, a sealing gasket is arranged between the flange and the rigid protective sleeve and the first flexible protective sleeve, a sealing gasket is arranged between the first flexible protective sleeve and the end cover, the sealing gasket is made of fluorinated silicone rubber, and the first flexible protective sleeve, the rigid protective sleeve and the second flexible protective sleeve form a protective shell.

[0009] In this installation structure, the innermost side of the electrode rod is the conductive rod, and the outermost side is the protective shell, which is composed of a first flexible protective sleeve, a rigid protective sleeve and a second flexible protective sleeve. The end cover and the auxiliary block are used to close the upper and lower ends of the protective shell, with the upper end being closed by the end cover and the lower end being closed by the auxiliary block. The flange and the connecting ring plate serve as a transition connection.

[0010] In this installation structure, the first flexible protection sleeve and the second flexible protection sleeve are both made of ceramic materials, while the rigid protection sleeve is made of steel materials.

[0011] In the installation structure, the fluorinated silicone rubber has good high temperature resistance, so the presence of the sealing gasket improves the sealing, ensures the sealing integrity of the protective shell, plays a good protective role for the conductive rod located in the protective shell, and reduces the probability of the conductive rod penetrating the protective shell.

[0012] At the same time, in this installation structure, the protective shell can be roughly regarded as consisting of an upper section (i.e., the first flexible protective sleeve section), a middle section (i.e., the rigid protective sleeve section) and a lower section (i.e., the second flexible protective sleeve section). Due to the presence of the sealing gasket, the upper section and the middle section can undergo a certain bending deformation, and the lower section and the intermediate section can undergo a certain bending deformation. Therefore, when water enters or exits the boiler furnace to impact the protective shell, each section of the protective shell will undergo a certain angle of bending deformation. The occurrence of this bending deformation can prevent the first flexible protective sleeve and the second flexible protective sleeve from breaking, while ensuring the good sealing of the protective shell.

[0013] Optionally, the sealing gasket is provided with an annular groove, and the sealing gasket is nested on the first flexible protective sleeve or the second flexible protective sleeve or the rigid protective sleeve through its own annular groove.

[0014] The sealing gasket is nested on the first flexible protective sleeve, the second flexible protective sleeve or the rigid protective sleeve through its own annular groove, so that the sealing gasket can be prevented from falling off the first flexible protective sleeve, the second flexible protective sleeve or the rigid protective sleeve. In the specific structure, the two ends of the first flexible protective sleeve are each clamped with a sealing gasket, and the two ends of the second flexible protective sleeve are each clamped with a sealing gasket.

[0015] Optionally, it also includes an insulating sleeve and a spacer sleeve, wherein the insulating sleeve is mounted on the conductive rod through the spacer sleeve, the insulating sleeve and the spacer sleeve are located in the protective outer shell, the insulating sleeve and the spacer sleeve form a protective inner shell, and the insulating sleeve does not contact the conductive rod.

[0016] The purpose of using the insulating sleeve and the spacer to form the protective inner shell is to further improve safety and reduce the probability of the conductive rod breaking through the protective outer shell. The specific spacer can be installed on the conductive rod by threaded connection.

[0017] Optionally, an auxiliary sleeve is further included, wherein the auxiliary sleeve is arranged on the auxiliary block, and an insulating support pad is arranged on the auxiliary sleeve, and the insulating support pad abuts against the insulating sleeve.

[0018] Optionally, the insulating support pad is an insulating support pad made of ceramic material, the insulating sleeve is an insulating sleeve made of fluorinated silicone rubber material, and the spacer sleeve is an insulating sleeve made of ceramic material.

[0019] Specifically in this structure, the insulating sleeve does not contact the conductive rod and the protective shell, and the heat generated by the conductive rod and the heat on the protective shell have relatively little effect on the insulating sleeve, so that the entire insulating sleeve can be kept at a relatively low temperature, ensuring that the entire insulating sleeve has a relatively long service life and insulation performance, ensuring that the insulating sleeve can play a good insulating effect between the conductive rod and the protective shell, and the ceramic spacer can position the insulating sleeve, so that the insulating sleeve is always in a relatively fixed position, thereby ensuring the stability of the insulation effect.

[0020] Specifically in this structure, two spacers are arranged between the insulating sleeve and the conductive rod, and the two spacers are respectively located at the upper and lower ends of the insulating sleeve. Since the insulating sleeve at the lower end is close to the electrode head, and the electrode head always needs to be in contact with the boiler water in the boiler furnace, there is a certain probability that boiler water will penetrate into this place. Therefore, in order to ensure good sealing at this place, an auxiliary sleeve and an insulating support pad are further arranged at this place, and the lower end of the insulating sleeve is against the insulating support pad, thereby ensuring the sealing of this place.

[0021] Optionally, the diameter of the rigid protective sleeve is smaller than the diameter of the first flexible protective sleeve, and the diameter of the rigid protective sleeve is smaller than the diameter of the second flexible protective sleeve.

[0022] Optionally, it also includes a high-voltage outlet cabinet, a boiler PLC control cabinet, a voltage transformer, a current transformer and a zero-sequence current transformer. The three-phase power lines of the high-voltage outlet cabinet are respectively connected to the three electrode rods in the boiler. The high-voltage outlet cabinet is provided with a zero-sequence current transformer, a current transformer and a voltage transformer. The zero-sequence current transformer is used for zero-sequence current protection of the three electrode rods; the current transformer is used for short circuit and overcurrent protection of the three electrode rods, and the voltage transformer is used for undervoltage, overvoltage, phase loss and three-phase imbalance protection of the three electrode rods. The boiler PLC control cabinet is connected to the zero-sequence current transformer, the current transformer and the voltage transformer through the high-voltage outlet cabinet. The boiler PLC control cabinet receives data transmitted to the high-voltage outlet cabinet by the zero-sequence current transformer, the current transformer and the voltage transformer, and alarms when the data exceeds the alarm value.

[0023] Optionally, the temperature difference between the water temperature at the water inlet and the water temperature at the water outlet on the boiler furnace body does not exceed 20°C.

[0024] The beneficial effects of the present invention are as follows: the presence of the sealing gasket improves the sealing performance, ensures the sealing integrity of the protective shell, plays a good protective role for the conductive rod located in the protective shell, and reduces the probability of the conductive rod piercing the protective shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the structure of the electrode boiler;

[0027] Figure 2 It is a schematic diagram of the structure of the electrode rod;

[0028] Figure 3 yes Figure 2 The enlarged schematic diagram of A in the middle;

[0029] Figure 4 yes Figure 2 The enlarged schematic diagram of B in the middle;

[0030] Figure 5 It is a control logic diagram of the high-voltage outlet cabinet for the electrode boiler.

[0031] The reference numerals in the figure are: 1. boiler body; 101. water inlet; 102. water outlet; 2. electrode rod; 2011. first flexible protective sleeve; 2012. second flexible protective sleeve; 202. conductive rod; 203. flange; 204. rigid protective sleeve; 205. connecting ring plate; 206. auxiliary block; 207. electrode head; 208. sealing gasket; 209. end cover; 210. insulating sleeve; 211. spacer sleeve; 212. auxiliary sleeve; 213. insulating support pad. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] Example 1

[0036] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4As shown, an anti-breakdown installation structure for electrode rods of an immersed electrode boiler includes a boiler furnace body 1 and electrode rods. There are three electrode rods (three phase lines are connected respectively), and the three electrode rods are installed in the boiler furnace body 1. The boiler furnace body 1 is provided with a water inlet 101 and a water outlet 102. The electrode rods include a conductive rod 202, an electrode head 207, an auxiliary block 206, an end cover 209, a flange 203, a connecting ring plate 205, a first flexible protective sleeve 2011, a rigid protective sleeve 204, a second flexible protective sleeve, and a plurality of sealing gaskets 208. The electrode head 207 is arranged at one end of the conductive rod 202, the auxiliary block 206 is arranged at one end of the conductive rod 202, the electrode head 207 is fixedly connected to the conductive rod 202 through the auxiliary block 206, and the first flexible protective sleeve 2011 and the second flexible protective sleeve are respectively arranged on the rigid protective sleeve At both ends of the tube 204, the flange 203 is located between the first flexible protective sleeve 2011 and the rigid protective sleeve 204, the connecting ring plate 205 is arranged between the rigid protective sleeve 204 and the second flexible protective sleeve, a sealing gasket 208 is arranged between the auxiliary block 206 and the second flexible protective sleeve, a sealing gasket 208 is arranged between the connecting ring plate 205 and the rigid protective sleeve 204 and the second flexible protective sleeve, a sealing gasket 208 is arranged between the flange 203 and the rigid protective sleeve 204 and the first flexible protective sleeve 2011, a sealing gasket 208 is arranged between the first flexible protective sleeve 2011 and the end cover 209, and the sealing gasket 208 is a sealing gasket 208 made of fluorinated silicone rubber. The first flexible protective sleeve 2011, the rigid protective sleeve 204 and the second flexible protective sleeve 2012 form a protective shell. The protective shell insulates the conductive rod from the furnace water (electrolyte).

[0037] In this installation structure, the innermost side of the electrode rod 2 is the conductive rod 202, and the outermost side is the protective shell, which is composed of a first flexible protective sleeve 2011, a rigid protective sleeve 204 and a second flexible protective sleeve 2012. The end cover 209 and the auxiliary block 206 are used to close the upper and lower ends of the protective shell, with the upper end being closed by the end cover 209 and the lower end being closed by the auxiliary block 206. The flange 203 and the connecting ring plate 205 play a transition connection role.

[0038] In this installation structure, the first flexible protection sleeve 2011 and the second flexible protection sleeve 2012 are both made of ceramic materials, while the rigid protection sleeve 204 is made of steel materials.

[0039] In the present installation structure, fluorinated silicone rubber has good high temperature resistance, so the presence of the sealing gasket 208 improves the sealing, ensures the sealing integrity of the protective shell, plays a good protective role for the conductive rod 202 located in the protective shell, and reduces the probability of the conductive rod 202 penetrating the protective shell.

[0040] At the same time, in this installation structure, the protective shell can be roughly regarded as consisting of an upper section (i.e., the first flexible protective sleeve 2011 section), a middle section (i.e., the rigid protective sleeve 204 section) and a lower section (i.e., the second flexible protective sleeve section). Due to the presence of the sealing gasket 208, the upper section and the middle section can undergo a certain bending deformation, and the lower section and the interruption section can undergo a certain bending deformation. Therefore, when water enters or exits the boiler furnace body 1 to impact the protective shell, each section of the protective shell will undergo a certain angle of bending deformation. The occurrence of this bending deformation can prevent the first flexible protective sleeve 2011 and the second flexible protective sleeve 2012 from breaking, while ensuring the good sealing of the protective shell. Since the first flexible protective sleeve 2011 and the second flexible protective sleeve 2012 have stronger resistance to boiler water impact, the speed of boiler water flowing in from the water inlet and out from the water outlet can be increased, which can increase the flow rate of boiler water in the boiler furnace. The flowing boiler water can take away the heat from the electrode head and the protective shell, so the faster boiler water flow rate can speed up the cooling of the electrode head and the protective shell, so that the electrode head and the protective boiler furnace can work at a relatively low temperature, thereby further improving the service life of the electrode head and the protective shell.

[0041] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, the sealing gasket 208 is provided with an annular groove, and the sealing gasket 208 is nested on the first flexible protective sleeve 2011 or the second flexible protective sleeve or the rigid protective sleeve 204 through its own annular groove.

[0042] The sealing gasket 208 is nested on the first flexible protective sleeve 2011 or the second flexible protective sleeve or the rigid protective sleeve 204 through its own annular groove, so that the sealing gasket 208 can be prevented from falling off the first flexible protective sleeve 2011 or the second flexible protective sleeve or the rigid protective sleeve 204. Specifically in this structure, the two ends of the first flexible protective sleeve 2011 are respectively clamped with a sealing gasket 208, and the two ends of the second flexible protective sleeve are respectively clamped with a sealing gasket 208.

[0043] Specifically in this structure, the sealing gaskets 208 at both ends of the first flexible protective sleeve 2011 are just tightly together with respect to the end cover and the flange, the sealing gaskets 208 at both ends of the rigid protective sleeve 204 are just tightly together with respect to the flange and the connecting ring plate, and the sealing gaskets 208 at both ends of the second flexible protective sleeve 2012 are just tightly together with respect to the connecting ring plate and the auxiliary block.

[0044] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4As shown, it also includes an insulating sleeve 210 and a spacer sleeve 211. The insulating sleeve 210 is sleeved on the conductive rod 202 through the spacer sleeve 211. The insulating sleeve 210 and the spacer sleeve 211 are located in the protective outer shell. The insulating sleeve 210 and the spacer sleeve 211 form a protective inner shell, and the insulating sleeve 210 does not contact the conductive rod 202.

[0045] The purpose of forming the protective inner shell by using the insulating sleeve 210 and the spacer sleeve 211 is to further improve safety and reduce the probability of the conductive rod 202 breaking through the protective outer shell. Specifically, the spacer sleeve 211 can be installed on the conductive rod 202 by threaded connection.

[0046] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, an auxiliary sleeve 212 is also included. The auxiliary sleeve 212 is arranged on the auxiliary block 206 . An insulating support pad 213 is arranged on the auxiliary sleeve 212 . The insulating support pad 213 abuts against the insulating sleeve 210 .

[0047] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, the insulating support pad 213 is an insulating support pad 213 made of ceramic material, the insulating sleeve 210 is an insulating sleeve 210 made of fluorinated silicone rubber, and the spacer sleeve 211 is a heat-insulating sleeve made of ceramic material.

[0048] Specifically, in this structure, the insulating sleeve 210 does not contact the conductive rod 202 and the protective shell, and the heat generated by the conductive rod 202 and the heat on the protective shell have relatively little effect on the insulating sleeve 210, so that the entire insulating sleeve 210 can be kept at a relatively low temperature, ensuring that the entire insulating sleeve 210 has a relatively long service life and insulation performance, and ensuring that the insulating sleeve 210 can play a good insulation effect between the conductive rod 202 and the protective shell. The ceramic spacer 211 can play a positioning role for the insulating sleeve 210, so that the insulating sleeve 210 is always in a relatively fixed position, which can ensure the stability of the insulation effect. Due to the use of ceramic spacers and fluorinated silicone rubber insulating sleeves, the weight of the entire electrode rod can be reduced to a certain extent.

[0049] Specifically in this structure, two spacers 211 are arranged between the insulating sleeve 210 and the conductive rod 202, and the two spacers 211 are respectively located at the upper and lower ends of the insulating sleeve 210. Since the insulating sleeve 210 at the lower end is close to the electrode head 207, and the electrode head 207 always needs to be in contact with the boiler water in the boiler furnace body 1, there is a certain probability that boiler water will penetrate into this place. Therefore, in order to ensure good sealing at this place, an auxiliary sleeve 212 and an insulating support pad 213 are further arranged at this place, and the lower end of the insulating sleeve 210 is against the insulating support pad 213, so as to ensure the sealing of this place.

[0050] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, the diameter of the rigid protective sleeve 204 is smaller than the diameter of the first flexible protective sleeve 2011 , and the diameter of the rigid protective sleeve 204 is smaller than the diameter of the second flexible protective sleeve.

[0051] Combined with Figure 1 And attached Figure 5 As shown, the structure also includes a high-voltage outlet cabinet, a boiler PLC control cabinet, a voltage transformer, a current transformer and a zero-sequence current transformer. The three-phase power lines (i.e., A, B, and C phases) of the high-voltage outlet cabinet are respectively connected to the three electrode rods 2 in the boiler. The high-voltage outlet cabinet is provided with a zero-sequence current transformer, a current transformer and a voltage transformer. The zero-sequence current transformer, the current transformer and the voltage transformer are all connected to the three phase lines A, B, and C. The zero-sequence current transformer is used for the zero-sequence current of the three electrode rods 2. current protection; the current transformer is used for short circuit and overcurrent protection of the three electrode rods 2, and the voltage transformer is used for undervoltage, overvoltage, phase loss and three-phase unbalance protection of the three electrode rods 2. The zero-sequence current transformer, current transformer and voltage transformer data are connected to the high-voltage outlet cabinet, and then connected to the boiler PLC control cabinet through the high-voltage outlet cabinet. The boiler PLC control cabinet is provided with an alarm device. The zero-sequence current transformer, current transformer and voltage transformer are all electrically connected to the alarm device (through the high-voltage outlet cabinet). The boiler PLC control cabinet receives the data transmitted by the zero-sequence current transformer, current transformer and voltage transformer to the high-voltage outlet cabinet, and alarms when the data exceeds the alarm value; the temperature difference between the water temperature of the water inlet 101 and the water temperature of the water outlet 102 on the boiler furnace body 1 does not exceed 20°C.

[0052] See attached Figure 5As shown, the zero-sequence current transformer transmits the information of zero-sequence current (at this time, the high-voltage outlet cabinet has taken leakage protection measures, that is, power is lost) to the alarm device; the current transformer transmits the early warning information of short circuit or overcurrent to the alarm device (at this time, the high-voltage outlet cabinet has taken short-circuit protection measures and overcurrent protection measures, that is, power is lost); the voltage transformer transmits the information of phase loss, three-phase imbalance, undervoltage or overvoltage to the alarm device (at this time, the high-voltage outlet cabinet has taken phase loss protection measures or three-phase imbalance protection measures or undervoltage protection measures or overvoltage protection measures, that is, power is lost).

[0053] Similarly, during the operation of the electrode boiler, the following may occur: instantaneous overvoltage, undervoltage, phase loss, three-phase imbalance; short circuit, overcurrent; leakage, etc. These factors will cause electrical breakdown of the electrode rods. In this design structure, voltage transformers, current transformers and zero-sequence current transformers are added. The zero-sequence current transformer is used to monitor the zero-sequence current value of the three electrode rods. When the zero-sequence current exceeds the set value, the boiler outlet cabinet directly loses power (that is, the three electrode rods of the electrode boiler are no longer powered). At the same time, the three electrode rods are monitored by the current transformer. The current transformer is used to monitor whether there is a short circuit and overcurrent between the electrode rods. When a short circuit and overcurrent occur, the boiler outlet cabinet loses power (that is, the three electrode rods of the electrode boiler are no longer powered). The voltage transformer can monitor whether the three electrode rods have undervoltage, overvoltage, phase loss and three-phase imbalance. When undervoltage, overvoltage, phase loss and three-phase imbalance occur, the boiler outlet cabinet will directly lose power (that is, the three electrode rods of the electrode boiler will no longer be powered). Therefore, this design structure avoids electrical breakdown of the electrode rods in the electrode boiler by setting a zero-sequence current transformer, a voltage transformer and a current transformer.

[0054] In summary, in the above design structure, the temperature difference between the water temperature at the water outlet 102 and the water inlet 101 of the electrode boiler is not higher than 20°C, which can ensure that several sealing gaskets can be kept at a relatively constant temperature, slowing down the aging speed of the sealing gaskets caused by temperature difference changes. At the same time, current transformers, voltage transformers and zero-sequence current transformers are set when the electrode boiler is installed to reduce the impact of power grid fluctuations on the conductive rods and the probability of the conductive rods breaking through the protective inner shell and the protective outer shell. Therefore, the above installation structure can effectively avoid thermal breakdown, electrical breakdown and electrochemical breakdown of the electrode boiler during operation.

[0055] Example 2

[0056] A city heating system based on an immersed electrode boiler includes an immersed electrode boiler, and the immersed electrode boiler adopts the immersed electrode boiler electrode rod anti-breakdown installation structure as shown in Example 1. The immersed electrode boiler is used to generate hot water, and the generated hot water can be used for municipal heating.

[0057] Example 3

[0058] A steam generating system based on an electrode boiler includes an immersed electrode boiler, and the immersed electrode boiler adopts the immersed electrode boiler electrode rod anti-breakdown installation structure as shown in Example 1. The immersed electrode boiler is used to generate steam, and the generated steam can be used for heating and industrial and agricultural production.

[0059] The above-described embodiments only express some embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, it is still possible to modify the technical solutions recorded in the above-mentioned embodiments, or to replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-breakdown installation structure for electrode rods of an immersed electrode boiler, comprising a boiler furnace and electrode rods, wherein there are three electrode rods, and the three electrode rods are installed in the boiler furnace, and a water inlet and a water outlet are provided on the boiler furnace, characterized in that: The electrode rod includes a conductive rod, an electrode head, an auxiliary block, an end cover, a flange, a connecting ring plate, a first flexible protective sleeve, a rigid protective sleeve, a second flexible protective sleeve, and a plurality of sealing gaskets. The electrode head is arranged at one end of the conductive rod, the auxiliary block is arranged at one end of the conductive rod, the first flexible protective sleeve and the second flexible protective sleeve are respectively arranged at two ends of the rigid protective sleeve, the flange is located between the first flexible protective sleeve and the rigid protective sleeve, the connecting ring plate is arranged between the rigid protective sleeve and the second flexible protective sleeve, a sealing gasket is arranged between the auxiliary block and the second flexible protective sleeve, a sealing gasket is arranged between the connecting ring plate and the rigid protective sleeve and the second flexible protective sleeve, a sealing gasket is arranged between the flange and the rigid protective sleeve and the first flexible protective sleeve, a sealing gasket is arranged between the first flexible protective sleeve and the end cover, the sealing gasket is a sealing gasket made of fluorinated silicone rubber, and the first flexible protective sleeve, the rigid protective sleeve and the second flexible protective sleeve form a protective shell.

2. The anti-breakdown installation structure for electrode rods of submerged electrode boilers according to claim 1, characterized in that: The sealing gasket is provided with an annular groove, and the sealing gasket is nested on the first flexible protective sleeve or the second flexible protective sleeve or the rigid protective sleeve through its own annular groove.

3. The anti-breakdown installation structure for electrode rods of submerged electrode boilers according to claim 1, characterized in that: It also includes an insulating sleeve and a spacer sleeve, wherein the insulating sleeve is mounted on the conductive rod through the spacer sleeve, the insulating sleeve and the spacer sleeve are located in the protective outer shell, the insulating sleeve and the spacer sleeve form a protective inner shell, and the insulating sleeve does not contact the conductive rod.

4. The anti-breakdown installation structure for electrode rods of submerged electrode boilers according to claim 3, characterized in that: It also includes an auxiliary sleeve, which is arranged on the auxiliary block. An insulating support pad is arranged on the auxiliary sleeve, and the insulating support pad abuts against the insulating sleeve.

5. The anti-breakdown installation structure for electrode rods of submerged electrode boilers according to claim 4, characterized in that: The insulating support pad is an insulating support pad made of ceramic material, the insulating sleeve is an insulating sleeve made of fluorinated silicone rubber material, and the spacer sleeve is a heat-insulating sleeve made of ceramic material.

6. The anti-breakdown installation structure for electrode rods of submerged electrode boilers according to claim 1, characterized in that: The diameter of the rigid protective sleeve is smaller than the diameter of the first flexible protective sleeve, and the diameter of the rigid protective sleeve is smaller than the diameter of the second flexible protective sleeve.

7. The anti-breakdown installation structure for electrode rods of submerged electrode boilers according to claim 1, characterized in that: It also includes a high-voltage outlet cabinet, a boiler PLC control cabinet, a voltage transformer, a current transformer and a zero-sequence current transformer. The three-phase power lines of the high-voltage outlet cabinet are respectively connected to the three electrode rods in the boiler. The high-voltage outlet cabinet is provided with a zero-sequence current transformer, a current transformer and a voltage transformer. The zero-sequence current transformer is used for zero-sequence current protection of the three electrode rods; the current transformer is used for short circuit and overcurrent protection of the three electrode rods, and the voltage transformer is used for undervoltage, overvoltage, phase loss and three-phase unbalance protection of the three electrode rods. The boiler PLC control cabinet is connected to the zero-sequence current transformer, the current transformer and the voltage transformer through the high-voltage outlet cabinet. The boiler PLC control cabinet receives data transmitted to the high-voltage outlet cabinet by the zero-sequence current transformer, the current transformer and the voltage transformer, and alarms when the data exceeds the alarm value.

8. The anti-breakdown installation structure for electrode rods of submerged electrode boilers according to claim 7, characterized in that: The temperature difference between the water temperature at the water inlet and the water outlet on the boiler body does not exceed 20°C.

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