Silicon carbide guide cylinder for water pump

Abstract

The invention provides a silicon carbide guide cylinder for a water pump, and relates to the technical field of silicon carbide application. The silicon carbide guide cylinder for the water pump comprises an inner cylinder and a supporting cylinder. The inner barrel and the supporting barrel are supported through the inner supporting plate, the supporting barrel and the inner cavity of the water pump are supported through the outer supporting plate, water flow impact force is effectively resisted, the electric heating rods are arranged in the heat conduction layer, when the water pump is used in winter, the inner barrel is heated through the electric heating rods to be subjected to temperature rise and freeze prevention, and the interior of the inner barrel can be prevented from being frozen; the temperature sensor is arranged on the outer wall of the inner barrel, the temperature in the inner barrel can be detected in real time, so that the electric heating rod can be started at reasonable time, the anti-freezing requirement is met, and electric energy waste is avoided; and after the inner cylinder is worn, the first glue filling layer and the second glue filling layer are filled with glue again after the inner cylinder is replaced by a new inner cylinder, so that the structure greatly facilitates the subsequent maintenance operation.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide application, in particular to a silicon carbide flow guide cylinder for a water pump. Background Art

[0002] A water pump is a machine for conveying liquid or pressurizing liquid. When the cavity in a traditional water pump is strongly flushed by the inhaled water flow, it is easy to cause wear. At the same time, the water flow is relatively turbulent, the water inlet resistance is large, and the energy consumption is high. For this reason, there is a public technology that proposes to set a guide cylinder in the water pump. The main function of the guide cylinder is to guide the water flow so that it enters the pump body more smoothly; the design of the guide cylinder follows the principles of fluid mechanics and achieves the best guidance of the water flow through reasonable shapes and sizes; its inlet is trumpet-shaped, which can expand the water inlet area and reduce the water inlet resistance; the internal A streamlined design is adopted to reduce the energy loss of water flow during the flow and reduce certain wear on the guide cylinder. For example, a silicon carbide guide cylinder for a water pump proposed in the prior art includes a guide cylinder body, the outer wall of the guide cylinder body is fixedly sleeved with a guide collar, the inside of the guide cylinder body is fixedly sleeved with an auxiliary cylinder, the outer wall of the auxiliary cylinder is fixedly sleeved with an auxiliary collar, the top edge of the guide collar is fixedly connected to the auxiliary collar by reinforcing ribs, and the inner wall of the guide cylinder body is connected to a reinforcing component. In this disclosed technology, the flushing force of the guide cylinder body is increased by a wear-resistant layer, followed by a filling layer and shock-absorbing cotton to doubly strengthen the strength of the guide cylinder body, and then the strength of the guide cylinder body is further strengthened by a foam block and a fiber layer, so that the wear of the guide cylinder is reduced, and the direction of the diversion water can be directed, thereby extending the life of the flow cylinder itself and improving the use effect; However, the silicon carbide guide cylinder for water pumps proposed in the above-mentioned public technology is prone to freezing and cracking in winter when used in outdoor water pumps, and it is obvious that its outer wall supporting force is insufficient and its impact resistance needs to be improved.

[0003] For this reason, there is a technology on the market that discloses an antifreeze water pump, which seals the pump body from the outside. This method can only delay the freezing inside the water pump, and cannot fundamentally prevent freezing and cracking. If it is not used outdoors for a long time in winter, the water inside will still freeze, and it is difficult to melt it by heating from the outside after freezing.

[0004] Another public technology discloses a device for preventing freezing cracks of pipes, containers and water meters. The device achieves the purpose of preventing freezing cracks by adding a telescopic layer to the inner wall. When the internal water freezes and expands, the telescopic layer shrinks under pressure, thereby preventing freezing cracks. However, the telescopic layer is made of materials with poor thermal conductivity such as rubber and foam plastics. After adding the telescopic layer, although the equipment will not freeze and crack, once frozen, it is difficult to melt the ice by heating from the outside, and it is difficult to thaw.

[0005] There is also a technology that proposes to wrap an insulation layer on the outside of the pump and add a heat source in the insulation layer for antifreeze. The wrapping insulation heating antifreeze leads to poor heat dissipation during non-antifreeze periods, seriously affecting the use of the equipment.

[0006] In summary, it is necessary to optimize and improve the structure of silicon carbide flow guide cylinder for water pumps. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a silicon carbide flow guide cylinder for a water pump, which solves the problems in the prior art that the strength of the silicon carbide flow guide cylinder for a water pump needs to be improved and the antifreeze effect is poor.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a silicon carbide flow guide cylinder for a water pump, comprising an inner cylinder and a support cylinder, the support cylinder being sleeved on the outer wall of the inner cylinder, the inner cylinder being composed of a front pipe opening, a cone pipe section and a rear pipe opening which are distributed in sequence front and back, the inner wall of the inner cylinder being provided with a flow guide cavity for flow diversion, the cone pipe section being larger at the front and smaller at the back, the outer wall of the inner cylinder being provided with a flange at the connection between the front pipe opening and the cone pipe section, the flange, the front pipe opening, the cone pipe section and the rear pipe opening being integrally formed, the inner side wall of the support cylinder being provided with an inner support assembly for improving the strength of the inner cylinder, the support cylinder being abutted against the inner cylinder through the inner support assembly, the outer wall of the support cylinder being provided with an outer support assembly for improving the strength of the support cylinder, the inner side wall of the support cylinder being provided with a front retaining ring and a rear retaining ring near the front and rear ends respectively, the inner side walls of the front retaining ring and the rear retaining ring being both slidably connected to the outer wall of the cone pipe section, and the front wall of the front retaining ring abutting against the rear wall of the flange.

[0009] Preferably, the inner wall of the support tube is fixedly connected with a plurality of sets of fixing seats between the front retaining ring and the rear retaining ring, the plurality of sets of fixing seats are equally distributed in a circle with the axis of the support tube as the center, a mounting groove is provided on the side of the fixing seat facing the axis of the support tube, an electric heating structure is provided on the inner wall of the mounting groove through a heat-conducting layer, the side of the heat-conducting layer away from the fixing seat abuts against the outer wall of the cone tube section, one of the plurality of mounting grooves is fixedly connected with a mounting seat on the inner wall and located on the front side of the heat-conducting layer, a temperature detection structure is provided on the side of the mounting seat facing the support tube, the side of the temperature detection structure away from the mounting seat abuts against the outer wall of the cone tube section, a first sealing structure is provided between the support tube and the flange, between the support tube and the cone tube section and at the rear side of the rear retaining ring, a second sealing structure is provided between the front retaining ring, the rear retaining ring and the support tube, and between the front retaining ring, the rear retaining ring and the cone tube section.

[0010] Preferably, the inner support assembly includes multiple groups of inner support plates, and the multiple groups of inner support plates are all fixedly connected to the inner wall of the support tube, and the inner support plates are located between any two circumferentially adjacent groups of the multiple groups of fixed seats, and the opposite sides of the front and rear stop rings are respectively abutted against the front and rear ends of the inner support plates, and the sides of the multiple groups of inner support plates facing the axis of the support tube are all abutted against the outer wall of the conical tube section.

[0011] Preferably, the external support assembly includes multiple groups of external support plates, which are all fixedly connected to the outer wall of the support tube, and are evenly distributed in a circle with the axis of the support tube as the center, and the front and rear ends of the external support plates are respectively aligned with the front and rear sections of the support tube.

[0012] Preferably, the electric heating structure comprises a plurality of groups of electric heating rods, and the plurality of groups of electric heating rods are respectively arranged inside a group of heat-conducting layers, and the positions of the electric heating rods inside the heat-conducting layers are located on one side close to the center of the support tube.

[0013] Preferably, the plurality of groups of heat-conducting layers are all heat-conducting silicone rubber, and the heat-conducting silicone rubber fixes the electric heating rod to the inner wall of the mounting groove by means of glue injection, and the electric heating rod conducts heat to the outer wall of the cone tube section through the heat-conducting layer.

[0014] Preferably, the temperature detection structure is a temperature sensor, which is fixedly connected to one end of the mounting seat away from the fixing seat, and the one end of the temperature sensor away from the mounting seat abuts against the outer wall of the cone tube section, and the internal temperature of the cone tube section is detected by the temperature sensor.

[0015] Preferably, the first sealing structure includes a first glue potting layer and a second glue potting layer, the first glue potting layer is arranged between the flange and the opposite end of the support tube and is located on the outer wall of the front baffle ring, the flange and the support tube are sealed by the first glue potting layer, the second glue potting layer is arranged between the inner wall of the support tube and the outer wall of the cone tube section and is located on the rear side of the rear baffle ring, the support tube and the cone tube section are sealed by the second glue potting layer, and the first glue potting layer and the second glue potting layer are both weather-resistant sealants.

[0016] Preferably, the second sealing structure includes a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring, the inner wall and outer wall of the front retaining ring are respectively provided with a first sealing groove and a second sealing groove, the first sealing ring and the second sealing ring are respectively arranged on the inner walls of the first sealing groove and the second sealing groove, the inner wall of the first sealing ring abuts against the outer wall of the cone tube section, the outer wall of the second sealing ring abuts against the inner wall of the support tube, the inner wall and outer wall of the rear retaining ring are respectively provided with a third sealing groove and a fourth sealing groove, the third sealing ring and the fourth sealing ring are respectively arranged on the inner wall of the third sealing groove and the inner wall of the fourth sealing groove, the inner wall of the third sealing ring abuts against the outer wall of the cone tube section, and the outer wall of the fourth sealing ring abuts against the inner wall of the support tube.

[0017] Preferably, a wiring harness is fixedly connected to the upper wall of the support tube near the rear end, and a waterproof plug is fixedly connected to the end of the wiring harness away from the support tube. The end of the wiring harness away from the waterproof plug passes through the inner wall of the support tube and is electrically connected to the electric heating structure and the temperature detection structure respectively.

[0018] The present invention provides a silicon carbide flow guide cylinder for a water pump, which has the following beneficial effects: 1. Compared with the prior art, the water pump uses a silicon carbide guide cylinder, and a support cylinder is arranged on the outer wall of the inner cylinder. The inner cylinder and the support cylinder are supported by multiple groups of inner support plates, and the support cylinder and the inner cavity of the water pump are supported by multiple groups of outer support plates. While guiding the water flow, it effectively resists the impact force of the water flow and improves the overall use strength.

[0019] 2. Compared with the prior art, the water pump uses a silicon carbide flow guide cylinder, and a heat-conducting layer is abutted against the outer wall of the inner cylinder. An electric heating rod is arranged inside the heat-conducting layer. When used in winter, the inner cylinder is heated by the electric heating rod to increase the temperature for antifreeze, which can prevent the inner cylinder from being frozen solid, has a good antifreeze effect, and the structure will not affect the heat dissipation of the water pump during the non-antifreeze period.

[0020] 3. Compared with the prior art, the water pump uses a silicon carbide flow guide cylinder, and a temperature sensor is provided on the outer wall of the inner cylinder, which can detect the internal temperature of the inner cylinder in real time, so as to activate the electric heating rod at a reasonable time, which can meet the antifreeze requirements without wasting electricity.

[0021] 4. Compared with the prior art, the water pump uses a silicon carbide flow guide cylinder, and the heat-conducting layer equipped with an electric heating rod and a temperature sensor are both arranged on the inner wall of the support cylinder. When the inner cylinder is worn, it is only necessary to replace the new inner cylinder and re-glue the first and second glue layers. This structure greatly facilitates subsequent maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the back side of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the AA section; Figure 4 For the present invention Figure 3 A partial enlarged view of point C in the middle; Figure 5 For the present invention Figure 3 A partial enlarged view of point D in the middle; Figure 6 For the present invention Figure 2 Partial cross-sectional view along the BB axis; Figure 7 For the present invention Figure 6 A partial enlarged view of point E in the middle; Figure 8 This is a schematic diagram of the back view of the inner tube of the present invention; Fig. 9 It is a partial cross-sectional view of the side structure of the front baffle ring of the present invention; Fig.10 It is a partial cross-sectional view of the side structure of the rear baffle ring of the present invention; Fig.11 It is a schematic diagram of the connection structure of the support tube, the outer support plate, the inner support plate and the fixing seat of the present invention.

[0023] Among them, 1. front pipe mouth; 2. rear pipe mouth; 3. flange; 4. guide cavity; 5. support tube; 6. outer support plate; 7. wiring harness; 8. waterproof plug; 9. first glue potting layer; 10. second glue potting layer; 11. cone pipe section; 12. inner support plate; 13. front retaining ring; 1301. first sealing groove; 1302. second sealing groove; 14. first sealing ring; 15. second sealing ring; 16. rear retaining ring; 1601. third sealing groove; 1602. fourth sealing groove; 17. third sealing ring; 18. fourth sealing ring; 19. fixing seat; 1901. mounting groove; 20. mounting seat; 21. temperature sensor; 22. thermal conductive layer; 23. electric heating rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example: like Figures 1 to 11 As shown, an embodiment of the present invention provides a silicon carbide flow guide cylinder for a water pump, including an inner cylinder and a support cylinder 5, the support cylinder 5 is sleeved on the outer wall of the inner cylinder, the inner cylinder is composed of a front pipe mouth 1, a cone pipe section 11 and a rear pipe mouth 2 which are distributed in sequence front to back, the inner wall of the inner cylinder is provided with a flow guide cavity 4 for diversion, the cone pipe section 11 is larger in front and smaller in the back, the outer wall of the inner cylinder and located at the connection between the front pipe mouth 1 and the cone pipe section 11 are provided with a flange 3, the flange 3, the front pipe mouth 1, the cone pipe section 11 and the rear pipe mouth 2 are integrally formed, when applied to a water pump, the water flow is guided by the internal shape of the flow guide cavity 4 to avoid water flow turbulence, the inner cylinder is the specific structure inside the flow guide cavity 4, and a plurality of flow guide grooves can be provided for guiding the direction of the water flow, like the flow guide cylinder proposed in Chinese Patent Publication No. CN219795668U, because the structure is not the key improvement content in this embodiment, the internal structure of the flow guide cavity 4 is not described in detail in this embodiment.

[0026] In order to make the support tube 5 play the role of supporting the inner tube, the inner wall of the support tube 5 is provided with an inner support assembly for improving the strength of the inner tube. The support tube 5 is abutted against the inner tube through the inner support assembly. The inner support assembly includes multiple groups of inner support plates 12. The multiple groups of inner support plates 12 are fixedly connected to the inner wall of the support tube 5. The inner support plate 12 is located between any two circumferentially adjacent groups of the multiple groups of fixed seats 19. The front retaining ring 13 and the rear retaining ring 16 are respectively abutted against the front end and the rear end of the inner support plate 12 on the opposite side. The multiple groups of inner support plates 12 are abutted against the outer wall of the cone section 11 on the side facing the axis of the support tube 5. After the water flow flushes into the diversion cavity 4, the impact force generated on the outer wall of the inner tube is supported by the multiple groups of inner support plates 12 and the support tube 5, which greatly improves the strength of the inner tube. In order to further improve the strength of the inner tube, an outer support assembly for improving the strength of the support tube 5 is provided on the outer wall of the support tube 5, and the outer support assembly includes multiple groups of outer support plates 6, and the multiple groups of outer support plates 6 are fixedly connected to the outer wall of the support tube 5, and the multiple groups of outer support plates 6 are equally distributed in a circle with the axis of the support tube 5 as the center, and the front and rear ends of the outer support plates 6 are respectively aligned with the front and rear sections of the support tube 5. When the silicon carbide guide cylinder is installed with the water pump, the end of the outer support plate 6 away from the support tube 5 abuts against the inner wall of the water pump housing, thereby forming a supporting effect on the outer wall of the support tube 5 through the inner cavity of the water pump housing with the help of the multiple groups of outer support plates 6, thereby further improving the impact strength of the inner tube supported by the support tube 5 through the multiple groups of inner support plates 12; In order to achieve waterproofing between the support tube 5 and the inner tube, a front baffle ring 13 and a rear baffle ring 16 are respectively arranged on the inner wall of the support tube 5 and near the front and rear ends. The inner walls of the front baffle ring 13 and the rear baffle ring 16 are slidably connected to the outer wall of the cone tube section 11, and the front wall of the front baffle ring 13 abuts against the rear wall of the flange 3. A first sealing structure is arranged between the support tube 5 and the flange 3, and between the support tube 5 and the cone tube section 11 and at the rear side of the rear baffle ring 16. The first sealing structure includes a first glue potting layer 9 and a second glue potting layer 10. The first glue potting layer 9 is arranged between the flange 3 and the support tube 5 is located between the opposite ends and on the outer wall of the front baffle ring 13, the flange 3 and the support tube 5 are sealed by the first glue layer 9, the second glue layer 10 is arranged between the inner wall of the support tube 5 and the outer wall of the cone tube section 11 and is located on the rear side of the rear baffle ring 16, the support tube 5 and the cone tube section 11 are sealed by the second glue layer 10, the first glue layer 9 and the second glue layer 10 are both weather-resistant sealants, after the support tube 5 and the inner tube are installed, the first glue layer 9 and the second glue layer 10 are poured to keep the inner wall of the support tube 5 dry to prevent water from entering the interior; In order to further improve the waterproof effect, a second sealing structure is arranged between the front baffle ring 13, the rear baffle ring 16 and the support tube 5, and between the front baffle ring 13, the rear baffle ring 16 and the cone tube section 11. The second sealing structure includes a first sealing ring 14, a second sealing ring 15, a third sealing ring 17 and a fourth sealing ring 18. The inner wall and the outer wall of the front baffle ring 13 are respectively provided with a first sealing groove 1301 and a second sealing groove 1302. The first sealing ring 14 and the second sealing ring 15 are respectively arranged on the inner wall of the first sealing groove 1301 and the second sealing groove 1302. The inner wall of the first sealing ring 14 abuts against the outer wall of the cone tube section 11, and the second sealing ring The outer wall of the rear retaining ring 16 is in contact with the inner wall of the support tube 5, the inner wall and outer wall of the rear retaining ring 16 are respectively provided with a third sealing groove 1601 and a fourth sealing groove 1602, the third sealing ring 17 and the fourth sealing ring 18 are respectively provided with the inner wall of the third sealing groove 1601 and the inner wall of the fourth sealing groove 1602, the inner wall of the third sealing ring 17 is in contact with the outer wall of the cone tube section 11, and the outer wall of the fourth sealing ring 18 is in contact with the inner wall of the support tube 5. By further providing the first sealing ring 14, the second sealing ring 15, the third sealing ring 17 and the fourth sealing ring 18 between the first glue potting layer 9 and the second glue potting layer 10, an effective supplementary sealing effect can be achieved; In order to achieve the antifreeze effect of the silicon carbide flow guide cylinder when the water pump is used in winter, a plurality of sets of fixing seats 19 are fixedly connected to the inner wall of the support cylinder 5 and located between the front baffle ring 13 and the rear baffle ring 16. The plurality of fixing seats 19 are equally distributed in a circle with the axis of the support cylinder 5 as the center. A mounting groove 1901 is provided on the side of the fixing seat 19 facing the axis of the support cylinder 5. An electric heating structure is provided on the inner wall of the mounting groove 1901 through a heat-conducting layer 22. The side of the heat-conducting layer 22 away from the fixing seat 19 abuts against the outer wall of the conical tube section 11. The electric heating structure includes a plurality of sets of electric heating rods 23. The plurality of sets of electric heating rods 23 are respectively arranged inside a group of heat-conducting layers 22. The position of the electric heating rods 23 inside the heat-conducting layer 22 is located on the side close to the center of the support cylinder 5. After the electric heating rods 23 are heated, the heat can be transferred toward the inner cylinder through the heat-conducting layer 22 to prevent the water flow inside the inner cylinder from being frozen, thereby achieving a better antifreeze effect. In order to achieve a better heat conduction effect, the multiple groups of heat-conducting layers 22 are all heat-conducting silicone rubber. The heat-conducting silicone rubber fixes the electric heating rod 23 on the inner wall of the installation groove 1901 by means of glue filling. The electric heating rod 23 conducts heat to the outer wall of the cone section 11 through the heat-conducting layer 22. The heat-conducting silicone rubber has very good thermal conductivity. Combined with the excellent thermal conductivity of the silicon carbide flow guide cylinder itself, the heat transfer during heating can be achieved relatively quickly. In order to fully save energy, one group of the inner wall of the multiple groups of mounting grooves 1901 is fixedly connected to a mounting seat 20 on the front side of the heat-conducting layer 22. A temperature detection structure is provided on the side of the mounting seat 20 facing the support tube 5. The side of the temperature detection structure away from the mounting seat 20 abuts against the outer wall of the conical tube section 11. The temperature detection structure is a temperature sensor 21. The temperature sensor 21 is fixedly connected to the end of the mounting seat 20 away from the fixed seat 19. The end of the temperature sensor 21 away from the mounting seat 20 abuts against the outer wall of the conical tube section 11. The internal temperature of the conical tube section 11 is detected by the temperature sensor 21. The temperature sensor 21 can detect the internal The temperature of the cylinder surface, when the temperature is lower than the set temperature, the electric heating rod 23 is controlled by a common control device on the market to turn on the power for heating. When the surface temperature of the inner cylinder is not high enough to cause freezing, the electric heating rod 23 is not turned on, thereby achieving the purpose of full energy saving; a wiring harness 7 is fixedly connected to the upper wall of the support cylinder 5 and near the rear end, and a waterproof plug 8 is fixedly connected to the end of the wiring harness 7 away from the support cylinder 5. The end of the wiring harness 7 away from the waterproof plug 8 passes through the inner wall of the support cylinder 5 and is electrically connected to the electric heating structure and the temperature detection structure respectively. The temperature sensor 21 and the electric heating rod 23 are connected to the water pump control part through the wiring harness 7 and the waterproof plug 8.

[0027] Working principle: the flange 3, the front pipe mouth 1, the conical pipe section 11 and the rear pipe mouth 2 are integrally formed. When applied to a water pump, the water flow is guided by the internal shape of the diversion chamber 4 to avoid water flow turbulence. The inner cylinder is the specific structure inside the diversion chamber 4. It can be provided with a plurality of diversion grooves, like the diversion cylinder body proposed in Chinese Patent Publication No. CN219795668U, for guiding the direction of the water flow. Since this structure is not the key improvement content in this embodiment, this embodiment does not expand the description of the internal structure of the diversion chamber 4. The side of the multiple groups of inner support plates 12 facing the axis of the support cylinder 5 is in contact with the outer wall of the conical pipe section 11. After the water flow flushes into the diversion chamber 4, the impact force generated on the outer wall of the inner cylinder is generated through the multiple groups of inner support plates 12. The support plate 12 and the support tube 5 jointly support the inner tube, greatly improving the strength of the inner tube. When the silicon carbide guide tube and the water pump are installed, the end of the outer support plate 6 away from the support tube 5 is in contact with the inner wall of the water pump housing, so that the outer wall of the support tube 5 is supported by the inner cavity of the water pump housing with the help of multiple groups of outer support plates 6, thereby further improving the impact strength of the inner tube supported by the support tube 5 through multiple groups of inner support plates 12; the support tube 5 and the cone section 11 are sealed by the second glue potting layer 10, and the first glue potting layer 9 and the second glue potting layer 10 are both weather-resistant sealants. After the support tube 5 and the inner tube are installed, the first glue potting layer 9 and the second glue potting layer 10 are poured to keep the inner wall of the support tube 5 dry, avoiding Water enters the interior, the inner wall of the first sealing ring 14 abuts against the outer wall of the cone tube section 11, the outer wall of the second sealing ring 15 abuts against the inner wall of the support tube 5, the inner wall of the third sealing ring 17 abuts against the outer wall of the cone tube section 11, and the outer wall of the fourth sealing ring 18 abuts against the inner wall of the support tube 5. By arranging the first sealing ring 14, the second sealing ring 15, the third sealing ring 17 and the fourth sealing ring 18 between the first glue potting layer 9 and the second glue potting layer 10, the effect of supplementary sealing can be effectively achieved; the inner wall of the mounting groove 1901 is provided with an electric heating structure through the heat-conducting layer 22, and the side of the heat-conducting layer 22 away from the fixing seat 19 abuts against the outer wall of the cone tube section 11, and the electric heating structure includes multiple groups of electric heating rods 23, multiple groups of electric heating The heating rods 23 are respectively arranged inside a group of heat-conducting layers 22. The position of the electric heating rod 23 inside the heat-conducting layer 22 is located on one side close to the center of the support tube 5. After the electric heating rod 23 is heated, the heat can be transferred toward the inner tube through the heat-conducting layer 22 to prevent the water flow inside the inner tube from being frozen, thereby achieving a good antifreeze effect. In order to achieve a better heat conduction effect, the multiple groups of heat-conducting layers 22 are all heat-conducting silicone rubber. The heat-conducting silicone rubber fixes the electric heating rod 23 on the inner wall of the mounting groove 1901 by means of glue filling. The electric heating rod 23 conducts heat to the outer wall of the cone section 11 through the heat-conducting layer 22. The heat-conducting silicone rubber has very good thermal conductivity. Combined with the excellent thermal conductivity of the silicon carbide flow guide cylinder itself, the heat transfer during heating can be achieved relatively quickly.In order to fully save energy, the internal temperature of the cone tube section 11 is detected by the temperature sensor 21. The temperature sensor 21 can detect the temperature of the inner tube surface. When the temperature is lower than the set temperature, the electric heating rod 23 is controlled by a common control device on the market to turn on the power for heating. When the surface temperature of the inner tube is not high enough to cause ice formation, the electric heating rod 23 is not turned on, so as to achieve the purpose of fully saving energy. The temperature sensor 21 and the electric heating rod 23 are connected to the water pump control part through the wiring harness 7 and the waterproof plug 8. ;

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicon carbide flow guide cylinder for a water pump, characterized in that: The invention comprises an inner tube and a support tube (5), wherein the support tube (5) is sleeved on the outer wall of the inner tube, the inner tube comprises a front pipe opening (1), a conical pipe section (11) and a rear pipe opening (2) which are arranged in sequence in the front and rear directions, the inner wall of the inner tube is provided with a flow diversion cavity (4) for diverting flow, the conical pipe section (11) is larger in the front and smaller in the rear, the outer wall of the inner tube is provided with a flange (3) at the connection between the front pipe opening (1) and the conical pipe section (11), the flange (3), the front pipe opening (1), the conical pipe section (11) and the rear pipe opening (2) are integrally formed, and the The inner wall of the support tube (5) is provided with an inner support assembly for improving the strength of the inner tube, the support tube (5) is abutted against the inner tube via the inner support assembly, the outer wall of the support tube (5) is provided with an outer support assembly for improving the strength of the support tube (5), the inner wall of the support tube (5) is provided with a front stop ring (13) and a rear stop ring (16) respectively near the front and rear ends, the inner walls of the front stop ring (13) and the rear stop ring (16) are both slidably connected to the outer wall of the cone tube section (11), and the front wall of the front stop ring (13) is abutted against the rear wall of the flange (3).

2. The silicon carbide flow guide cylinder for a water pump according to claim 1, characterized in that: The inner wall of the support tube (5) is fixedly connected to a plurality of sets of fixing seats (19) located between the front retaining ring (13) and the rear retaining ring (16). The plurality of sets of fixing seats (19) are equally distributed in a circle with the axis of the support tube (5) as the center. A mounting groove (1901) is provided on the side of the fixing seat (19) facing the axis of the support tube (5). An electric heating structure is provided on the inner wall of the mounting groove (1901) through a heat-conducting layer (22). The side of the heat-conducting layer (22) away from the fixing seat (19) abuts against the outer wall of the conical tube section (11). The inner wall of one set of the plurality of mounting grooves (1901) is located A mounting seat (20) is fixedly connected to the front side of the heat-conducting layer (22); a temperature detection structure is provided on a side of the mounting seat (20) facing the support tube (5); a side of the temperature detection structure away from the mounting seat (20) abuts against an outer wall of the conical tube section (11); a first sealing structure is provided between the support tube (5) and the flange (3) and between the support tube (5) and the conical tube section (11) and at the rear side of the rear retaining ring (16); and a second sealing structure is provided between the front retaining ring (13), the rear retaining ring (16) and the support tube (5) and between the front retaining ring (13), the rear retaining ring (16) and the conical tube section (11).

3. The silicon carbide flow guide cylinder for a water pump according to claim 2, characterized in that: The inner support assembly comprises a plurality of groups of inner support plates (12), the plurality of groups of inner support plates (12) are all fixedly connected to the inner side wall of the support tube (5), the inner support plates (12) are located between any two circumferentially adjacent groups of the plurality of groups of fixing seats (19), the front retaining ring (13) and the rear retaining ring (16) have opposite sides that respectively abut against the front end and the rear end of the inner support plate (12), and the plurality of groups of inner support plates (12) have sides that face the axis of the support tube (5) that abut against the outer wall of the conical tube section (11).

4. The silicon carbide flow guide cylinder for a water pump according to claim 3, characterized in that: The outer support assembly comprises a plurality of groups of outer support plates (6), the plurality of groups of outer support plates (6) are fixedly connected to the outer wall of the support tube (5), the plurality of groups of outer support plates (6) are equally distributed in a circle with the axis of the support tube (5) as the center, and the front and rear ends of the outer support plates (6) are respectively aligned with the front and rear sections of the support tube (5).

5. The silicon carbide flow guide cylinder for a water pump according to claim 4, characterized in that: The electric heating structure comprises a plurality of groups of electric heating rods (23), wherein the plurality of groups of electric heating rods (23) are respectively arranged inside a group of heat-conducting layers (22), and the positions of the electric heating rods (23) inside the heat-conducting layer (22) are located on a side close to the center of the support tube (5).

6. The silicon carbide flow guide cylinder for a water pump according to claim 5, characterized in that: The plurality of groups of heat-conducting layers (22) are all heat-conducting silicone rubber, and the heat-conducting silicone rubber fixes the electric heating rod (23) to the inner wall of the mounting groove (1901) by means of glue injection, and the electric heating rod (23) conducts heat to the outer wall of the conical tube section (11) through the heat-conducting layer (22).

7. The silicon carbide flow guide cylinder for a water pump according to claim 6, characterized in that: The temperature detection structure is a temperature sensor (21), the temperature sensor (21) being fixedly connected to one end of the mounting seat (20) away from the fixing seat (19), the end of the temperature sensor (21) away from the mounting seat (20) being in contact with the outer wall of the cone tube section (11), and the internal temperature of the cone tube section (11) is detected by the temperature sensor (21).

8. The silicon carbide flow guide cylinder for a water pump according to claim 7, characterized in that: The first sealing structure comprises a first glue potting layer (9) and a second glue potting layer (10); the first glue potting layer (9) is arranged between the flange (3) and an opposite end of the support tube (5) and is located on the outer wall of the front baffle ring (13); the flange (3) and the support tube (5) are sealed by the first glue potting layer (9); the second glue potting layer (10) is arranged between the inner wall of the support tube (5) and the outer wall of the cone tube section (11) and is located on the rear side of the rear baffle ring (16); the support tube (5) and the cone tube section (11) are sealed by the second glue potting layer (10); the first glue potting layer (9) and the second glue potting layer (10) are both weather-resistant sealants.

9. The silicon carbide flow guide cylinder for a water pump according to claim 8, characterized in that: The second sealing structure comprises a first sealing ring (14), a second sealing ring (15), a third sealing ring (17) and a fourth sealing ring (18); the inner wall and outer wall of the front retaining ring (13) are respectively provided with a first sealing groove (1301) and a second sealing groove (1302); the first sealing ring (14) and the second sealing ring (15) are respectively provided on the inner wall of the first sealing groove (1301) and the inner wall of the second sealing groove (1302); the inner wall of the first sealing ring (14) abuts against the outer wall of the conical tube section (11); The outer wall of the second sealing ring (15) abuts against the inner wall of the support tube (5); the inner wall and outer wall of the rear retaining ring (16) are respectively provided with a third sealing groove (1601) and a fourth sealing groove (1602); the third sealing ring (17) and the fourth sealing ring (18) are respectively provided on the inner wall of the third sealing groove (1601) and the inner wall of the fourth sealing groove (1602); the inner wall of the third sealing ring (17) abuts against the outer wall of the cone tube section (11); and the outer wall of the fourth sealing ring (18) abuts against the inner wall of the support tube (5).

10. The silicon carbide flow guide cylinder for a water pump according to claim 9, characterized in that: A wiring harness (7) is fixedly connected to the upper wall of the support tube (5) near the rear end, and one end of the wiring harness (7) away from the support tube (5) is fixedly connected to a waterproof plug (8), and one end of the wiring harness (7) away from the waterproof plug (8) penetrates the inner wall of the support tube (5) and is electrically connected to the electric heating structure and the temperature detection structure respectively.

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