Pressure-resistant cylinder for pump and water pump

Abstract

The application relates to a pressure-resistant cylinder for a pump and a water pump, and solves the problems of the prior art, such as the large spherical cylinder-shaped cylinder body consuming many raw materials, the pull rod connected to the connecting piece arranged in the cylinder body affecting the smoothness of a flow channel and the like, and the technical scheme is as follows: a cylindrical cylinder body, an end cover closing one end of the cylinder body, the cylinder body and the end cover being an integrated structure, a water inlet pipe arranged in the middle part area of the end cover, the water inlet pipe standing on the outer surface of the end cover and being communicated with the inner cavity of the cylinder body, a water adding opening arranged on the end cover, the water adding opening being arranged at intervals with the water inlet pipe, a water outlet pipe arranged on the cylinder body, the water outlet pipe standing on the outer surface of the cylinder body and being communicated with the inner cavity of the cylinder body, and a water discharge opening arranged on the cylinder body, the water discharge opening being arranged at intervals with the cylinder body. The effect is that the cylinder body is changed into a cylindrical shape, the end cover is changed into a nearly flat plate type, raw material consumption is saved, the internal flow channel space is contracted, in addition, the water adding opening and the water discharge opening are arranged, and the pressure-resistant cylinder is applied to the water pump to improve the water pump performance and the water pump operation stability.

Description

Pressure-resistant cylinders for pumps and water pumps Technical Field

[0001] This invention relates to the field of water pumps, and more particularly to a pressure-resistant cylinder for pumps and a water pump. Background Technology

[0002] The pressure-resistant cylinder on the existing water pump includes a cylinder body and an end cap at one end of the cylinder body. The other end of the cylinder body is open, and both the cylinder body and the end cap are flared outwards. The cylinder body is a spherical ring, and the end cap is spherical, crown-shaped, or similar to a spherical crown or olive-shaped. The end cap and the cylinder body have a smooth, integral arc transition. An inlet pipe is installed on the end cap, and an outlet pipe is installed on the side wall of the cylinder body. The open end of the cylinder body mates with a connecting piece, the other end of which connects to the motor on the water pump. Four rails are installed inside the cylinder body. One end of the rail is fixed to the inner wall of the end cap, and the other end is fixed to the connecting piece, connecting the pressure-resistant cylinder to the connecting piece. The overall dimensions of the pressure-resistant cylinder are large, and due to the influence of the rails, the hydraulic loss in the internal flow channel is significant, thus affecting the overall performance and operational stability of the water pump. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems existing in the prior art by providing a pressure-resistant cylinder for pumps and a water pump. By changing the cylinder body to a cylindrical shape and the end cap to a near-flat plate shape, it is not only convenient for production and processing, but also helps to save raw material consumption and reduce costs. Moreover, the internal structure of the cylinder body is a shrinking structure (compared to the spherical or similar spherical outward-expanding cylinder body), which is conducive to the shrinkage of the internal flow channel space. The addition of water inlet and outlet ports makes the internal flow channel of the cylinder body smoother, which helps to improve the performance and operation stability of the water pump after the pressure-resistant cylinder is applied to the water pump.

[0004] The above-mentioned technical objective of this invention is mainly achieved through the following technical solution: a pressure-resistant cylinder for pumps, characterized by comprising a cylindrical body, an end cap sealing one end of the cylinder, the cylinder and the end cap being an integral structure, a water inlet pipe disposed in the middle region of the end cap, the water inlet pipe standing on the outer surface of the end cap and communicating with the inner cavity of the cylinder, a water inlet disposed on the end cap, the water inlet being spaced apart from the water inlet pipe, a water outlet pipe disposed on the cylinder, the water outlet pipe standing on the outer surface of the cylinder and communicating with the inner cavity of the cylinder, and a drain outlet disposed on the cylinder, the drain outlet being spaced apart from the cylinder. This technical solution changes the cylinder to a cylindrical shape and the end cap to a near-flat shape, which facilitates production and processing, simplifies the processing technology, saves raw material consumption, and reduces costs. Furthermore, the internal structure of the cylinder is a contraction structure (compared to an outwardly expanding spherical or similar spherical cylinder). The pressure-resistant cylinder involved in this technical solution is fixed to the connecting parts through an external connection structure, so that the inner wall space of the pressure-resistant cylinder is not damaged by the connection structure, which is conducive to the shrinkage of the internal flow channel space. The addition of water inlet and outlet makes the internal flow channel of the cylinder smoother, which is beneficial to the improvement of water pump performance and water pump operation stability after the pressure-resistant cylinder is applied to the water pump.

[0005] As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures: The end cap includes a middle ring, an inclined ring, a transition ring, and an outer ring with a coaxial axis. The middle ring, inclined ring, transition ring, and outer ring are an integral structure. The outer edge of the middle ring is first folded outward and then obliquely folded inward. The ring formed by the oblique fold is the inclined ring. The transition ring is located at the outer edge of the inclined ring. The transition ring is folded outward and then flattened. The ring formed by the flattening is the outer ring. The end cap involved in this technical solution is not a common disc shape. The projection of the end cap in the axial direction is circular. The end cap also has a spatial structure within a certain range in the axial direction. The spatial structure is beneficial to the smoother flow channel inside the pressure-resistant cylinder. At the same time, the spatial structure is also beneficial to increasing the strength of the end cap.

[0006] The planes containing the transition ring, middle ring, and outer ring are perpendicular to the axis of the cylinder. The plane containing the outer ring is located axially outside the plane containing the middle ring, and the plane containing the transition ring is located axially inside the plane containing the middle ring. The plane containing the transition ring is the innermost plane of the end cap, and the plane containing the outer ring is the outermost plane of the end cap. The axes of the transition ring, middle ring, and outer ring are parallel to the axis of the cylinder or the central axis of the end cap. The parallelism of the transition ring, middle ring, and outer ring determines the overall axial thickness of the end cap. Furthermore, the wall thickness of the end cap is determined by the thicknesses of the middle ring, inclined ring, transition ring, and outer ring. The thicknesses of the middle ring, inclined ring, transition ring, and outer ring are basically the same, resulting in a thinner wall thickness for the end cap, reducing raw material consumption and lowering material costs. Although the end cap wall thickness is thin, the multiple folds on the end cap act as reinforcing ribs, resulting in high overall strength.

[0007] The axis of the inclined ring intersects with the axis of the cylinder inside the cylinder, and the water inlet is located on the inclined ring. The inclined ring is inclined towards the center of the cylinder, and the space enclosed by the inclined ring and the inner ring forms a space that is open at one end and narrow at the other. The open end faces the cylinder, and the narrow end faces the water inlet pipe, which facilitates a smoother flow path inside the pressure-resistant cylinder and better meets flow path requirements.

[0008] The water inlet has a water inlet pipe located inside the inclined ring, i.e., within the inner cavity of the cylinder. The axis of the water inlet pipe is perpendicular to the inclined ring. The water inlet pipe serves to guide the flow, allowing water entering the cylinder through the water inlet pipe to flow towards the inlet of the impeller assembly.

[0009] To better facilitate smooth flow within the pressure-resistant cylinder and reduce hydraulic loss, the axis of the water inlet and the axis of the water outlet are located on the same plane.

[0010] The cylinder is placed horizontally, with the water inlet and outlet located above the cylinder's axis, and the drain outlet located below the cylinder's axis. When pressure-resistant cylinders are used in water pumps, they are often used horizontally. The axis of the water inlet is usually set on the cylinder's axis, with the water inlet and outlet both positioned above the cylinder's axis. The drain outlet, following gravity, is located below the cylinder's axis for easy drainage.

[0011] In order to improve the hydraulic performance and reduce hydraulic loss when the pressure-resistant cylinder is used in a water pump, the length-to-diameter ratio of the cylinder is greater than 1.2:1 and less than 5:1.

[0012] The cylinder body has a pressure cap and a connecting member at each end, connected by several tie rods located on the outside of the cylinder body. When the pressure-resistant cylinder is used in a water pump, the open end of the pressure-resistant cylinder mates with the connecting member, and the pressure cap mates with the end cap on the pressure-resistant cylinder and is located on the outside of the end cap. The tie rods pass through the corresponding connecting holes on the pressure cap and the connecting member in sequence to form a connection, thus fixing the pressure-resistant cylinder to the connecting member. This technical solution places the connecting member that fixes the pressure-resistant cylinder to the connecting member on the outside of the pressure-resistant cylinder, avoiding placing the connecting member inside the pressure-resistant cylinder, thus preventing damage to the internal space of the pressure-resistant cylinder and helping to maintain the smooth flow channel inside the pressure-resistant cylinder without disruption. In addition, the pressure cap also helps to enhance the strength of the pressure-resistant cylinder.

[0013] A water pump using the aforementioned pressure-resistant cylinder includes a cylinder body, a motor connected to the cylinder body via a coupling, and a drive shaft of the motor extending into the cylinder body and connecting to an impeller assembly disposed within the cylinder body.

[0014] The connection is formed, characterized in that the cylinder is the aforementioned pump pressure-resistant cylinder. Applying the improved pressure-resistant cylinder, firstly, in terms of overall shape, the internal flow channel space of the pressure-resistant cylinder is reduced, the internal flow channel is compact, reducing internal eddies and thus helping to reduce hydraulic losses. Secondly, the method of fixing the pressure-resistant cylinder to the connecting member is changed; instead of the existing method of setting a tie rod inside the pressure-resistant cylinder to connect to the connecting member, it is replaced by the cooperation of a pressure cap and a tie rod, so that the pressure cap and tie rod are set on the outside of the pressure-resistant cylinder. This makes the connection structure more reasonable and avoids affecting the internal structure of the pressure-resistant cylinder, making the pressure-resistant cylinder work more stably, thereby improving the performance and operational stability of the water pump.

[0015] The beneficial effects of this invention are as follows:

[0016] Changing the cylinder body to a cylindrical shape and the end caps to a near-flat plate shape facilitates production and processing, simplifies the manufacturing process, saves raw materials, and reduces costs. Furthermore, the internal structure of the cylinder is a contractile structure (compared to spherical or similar outward-expanding cylinders). The pressure-resistant cylinder involved in this technical solution is fixed to the connecting parts via an external connection structure, ensuring that the internal wall space of the pressure-resistant cylinder is not damaged by the connection structure. This facilitates the contraction of the internal flow channel space. The addition of a water inlet and outlet further promotes smoother flow within the cylinder, ultimately improving pump performance and operational stability when the pressure-resistant cylinder is applied to a water pump.

[0017] The improved pressure-resistant cylinder has several advantages. First, in terms of overall shape, the internal flow channel space is reduced, making the internal flow channel more compact and reducing internal eddies, which helps to reduce hydraulic losses. Second, the way the pressure-resistant cylinder is fixed to the connecting parts has been changed. Instead of the existing method of using a tie rod inside the pressure-resistant cylinder to connect to the connecting parts, the pressure cap and tie rod are placed on the outside of the pressure-resistant cylinder through the cooperation of the pressure cap and tie rod. This makes the connection structure more reasonable and avoids affecting the internal structure of the pressure-resistant cylinder, making the pressure-resistant cylinder work more stably. In turn, it helps to improve the performance and operational stability of the water pump. Attached Figure Description

[0018] Figure 1 is a structural schematic diagram of the pressure-resistant cylinder involved in this invention.

[0019] Figure 2 is a cross-sectional view of the structure shown in Figure 1.

[0020] Figure 3 is a schematic diagram of a water pump according to the present invention.

[0021] Figure 4 is a schematic diagram of a cross-sectional structure of Figure 3.

[0022] In the diagram: 1. Cylinder; 2. End cap; 3. Inlet pipe; 4. Water inlet; 5. Outlet pipe; 6. Drain outlet; 7. Middle ring; 8. Inclined ring; 9. Transition ring; 10. Outer ring; 11. Water inlet pipe; 12. Pressure cap; 13. Connecting component; 14. Tie rod; 15. Motor; 16. Drive shaft; 17. Impeller assembly. Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0024] Example 1: As shown in Figures 1-4, a pressure-resistant cylinder for pumps includes a cylindrical body 1 and an end cap 2 that closes one end of the body 1. The body 1 and end cap 2 are an integral structure. A water inlet pipe 3 is provided in the middle region of the end cap 2. The water inlet pipe 3 stands on the outer surface of the end cap 2 and communicates with the inner cavity of the body 1. A water inlet 4 is provided on the end cap 2, and the water inlet 4 is spaced apart from the water inlet pipe 3. A water outlet pipe 5 is provided on the body 1, and the water outlet pipe 5 stands on the outer surface of the body 1 and communicates with the inner cavity of the body 1. A drain outlet 6 is also provided on the body 1, and the drain outlet 6 is spaced apart from the body 1. This technical solution changes the body 1 to a cylindrical shape and the end cap 2 to a near-flat shape, which facilitates production and processing, simplifies the processing technology, saves raw material consumption, and reduces costs. Moreover, the internal structure of the body 1 is a contraction structure (compared to a spherical or similarly spherical outward-expanding body 1). The pressure-resistant cylinder involved in this technical solution is fixed to the connecting member 13 through an external connection structure, so that the inner wall space of the pressure-resistant cylinder is not damaged by the connection structure, which is conducive to the shrinkage of the internal flow channel space. The addition of water inlet 4 and drain outlet 6 makes the flow channel inside the cylinder 1 smoother, which is conducive to improving the performance and operation stability of the water pump after the pressure-resistant cylinder is applied to the water pump.

[0025] To ensure better hydraulic performance and reduced hydraulic losses when the pressure-resistant cylinder is used in a water pump, the length-to-diameter ratio of the cylinder 1 is greater than 1.2:1 and less than 5:1. Preferably, the length-to-diameter ratio of the cylinder 1 is greater than 1.5:1.

[0026] Next, the specific structure of the end cap 2 is described in further detail. The end cap 2 includes a coaxial middle ring 7, an inclined ring 8, a transition ring 9, and an outer ring 10. The middle ring 7, inclined ring 8, transition ring 9, and outer ring 10 are an integral structure. The outer edge of the middle ring 7 is first folded outward and then obliquely folded inward, forming the inclined ring 8. The transition ring 9 is located on the outer edge of the inclined ring 8. The transition ring 9 is folded outward and then flattened, forming the outer ring 10. The end cap 2 involved in this technical solution is not a common disc shape. The projection of the end cap 2 in the axial direction is circular. The end cap 2 also has a spatial structure within a certain range in the axial direction. The spatial structure is beneficial for smoother flow channels inside the pressure-resistant cylinder. At the same time, the spatial structure is also beneficial for increasing the strength of the end cap 2.

[0027] The specific structure of the end cap 2 is further optimized. The plane containing the transition ring 9, the middle ring 7, and the outer ring 10 is perpendicular to the axis of the cylinder 1. The plane containing the outer ring 10 is located axially outside the plane containing the middle ring 7, and the plane containing the transition ring 9 is located axially inside the plane containing the middle ring 7. The plane containing the transition ring 9 is the innermost plane of the end cap 2, and the plane containing the outer ring 10 is the outermost plane of the end cap 2. The axes of the transition ring 9, the middle ring 7, and the outer ring 10 are parallel to the axis of the cylinder 1 or the central axis of the end cap 2. The parallelism of the transition ring 9, the middle ring 7, and the outer ring 10 determines the overall axial thickness of the end cap 2. Moreover, the wall thickness of the end cap 2 is determined by the thickness of the middle ring 7, the inclined ring 8, the transition ring 9, and the outer ring 10. The thicknesses of the middle ring 7, the inclined ring 8, the transition ring 9, and the outer ring 10 are basically the same. Therefore, the wall thickness of the end cap 2 is relatively thin, which consumes less raw materials and helps to reduce material costs. Although the end cap 2 has a relatively thin wall, it has multiple folds that act as reinforcing ribs, making the end cap 2 strong overall.

[0028] Further improvements were made to the pressure-resistant cylinder by adding a water inlet 4. Specifically, the axis of the inclined ring 8 intersects the axis of the cylinder 1 inside the cylinder 1, and the water inlet 4 is located on the inclined ring 8. That is, the inclined ring 8 is inclined towards the center of the cylinder 1, and the space enclosed by the inclined ring 8 and the inner ring forms a space that is open at one end and narrow at the other. The open end faces the cylinder 1, and the narrow end faces the water inlet pipe 3, which facilitates a smoother flow channel inside the pressure-resistant cylinder and better meets the flow channel requirements.

[0029] The technical solution for the added water inlet 4 is further optimized: the water inlet 4 has a water inlet pipe 11, which is located inside the inclined ring 8, that is, inside the cavity of the cylinder 1, and the axis of the water inlet pipe 11 is perpendicular to the inclined ring 8. The water inlet pipe 11 serves to guide the flow, allowing the water entering the cylinder 1 through the water inlet pipe 11 to flow towards the water inlet of the impeller assembly 17.

[0030] To ensure smooth flow within the pressure-resistant cylinder and reduce hydraulic losses, the inlet pipe 3, outlet pipe 5, inlet, and outlet need to be rationally arranged. The specific plan is as follows:

[0031] The axis of the water inlet 4 and the axis of the water outlet 5 are located on the same plane.

[0032] When pressure-resistant cylinders are used in water pumps, they are often used horizontally. The inlet 4 and the outlet are located above the axis of the cylinder body 1, and the outlet 6 is located below the axis of the cylinder body 1. The axis of the inlet is usually set on the axis of the cylinder body 1. The inlet 4 and the outlet are both set above the axis of the cylinder body 1, and the outlet 6 is set below the axis of the cylinder body 1 following gravity for easy drainage.

[0033] The third key improvement of this technical solution lies in changing the way the pressure-resistant cylinder is fixed to the connecting member 13. The existing internal tie rod 14 connection method is replaced with an external tie rod 14 connection method, specifically as follows: A pressure cap 12 and a connecting member 13 are respectively provided at both ends of the cylinder 1. The pressure cap 12 and the connecting member 13 are connected by several tie rods 14, which are located on the outside of the cylinder 1. When the pressure-resistant cylinder is used in a water pump, the open end of the pressure-resistant cylinder mates with the connecting member 13, and the pressure cap 12 mates with the end cap 2 on the pressure-resistant cylinder and is located on the outside of the end cap 2. The tie rods pass through the corresponding connecting holes on the pressure cap 12 and the connecting member 13 in sequence to form a connection, thus fixing the pressure-resistant cylinder to the connecting member 13. This technical solution places the connecting member that fixes the pressure-resistant cylinder to the connecting member 13 on the outside of the pressure-resistant cylinder, avoiding placing the connecting member inside the pressure-resistant cylinder, thus preventing damage to the internal space of the pressure-resistant cylinder and helping to maintain the smooth flow channel inside the pressure-resistant cylinder without damage. Furthermore, the setting of the pressure cap 12 also helps to enhance the strength of the pressure-resistant cylinder.

[0034] In existing pressure-resistant cylinders, a fixed inner cover is installed inside the cylinder, located inside the water inlet pipe 3. An inner water inlet pipe 3 is mounted on the inner cover and sealed to the water inlet pipe 3 on the pressure-resistant cylinder. Then, the pull rod 14 passes through the connector and the inner cover sequentially to form a connection. Finally, the pressure-resistant cylinder and the connector are connected externally. This overall connection structure is cumbersome and complex to operate. Furthermore, the pull rod 14 being located inside the pressure-resistant cylinder not only poses the problem of damaging the internal flow channels but also makes it prone to rusting and corrosion, resulting in unreliable connection strength. Therefore, this technical solution is not simply an improvement by moving the pull rod 14 from the inside to the outside. It reduces the existing technology's at least two connection steps to a single connection step, greatly simplifying the connection structure and operation, improving assembly and maintenance efficiency. Moreover, placing the pull rod 14 outside the pressure-resistant cylinder makes it easier to inspect and ensure connection reliability.

[0035] Example 2: As shown in Figures 1-4, a water pump using a pressure-resistant cylinder includes a cylinder 1, a motor 15 connected to the cylinder 1 via a connecting member 13, and a drive shaft 16 of the motor 15 extending into the cylinder 1 and connected to an impeller assembly 17 disposed within the cylinder 1. The cylinder 1 is the pressure-resistant cylinder for pumps described in Example 1.

[0036] The improved pressure-resistant cylinder has several advantages. First, in terms of overall shape, the internal flow channel space is reduced, making the internal flow channel more compact and reducing internal eddies, which helps to reduce hydraulic losses. Second, the way the pressure-resistant cylinder is fixed to the connecting member 13 has been changed. Instead of the existing method of setting the tie rod 14 inside the pressure-resistant cylinder to connect to the connecting member 13, the pressure cover 12 and the tie rod 14 are placed on the outside of the pressure-resistant cylinder through cooperation. This makes the connection structure more reasonable and avoids affecting the internal structure of the pressure-resistant cylinder, making the pressure-resistant cylinder work more stably. This, in turn, helps to improve the performance and operational stability of the water pump.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pressure-resistant cylinder for pumps, characterized in that... The device includes a cylindrical body (1), an end cap (2) that closes one end of the body (1), the body (1) and the end cap (2) being an integral structure, an inlet pipe (3) being provided in the middle area of ​​the end cap (2), the inlet pipe (3) being erected on the outer surface of the end cap (2) and communicating with the inner cavity of the body (1), a water inlet (4) being provided on the end cap (2), the water inlet (4) being spaced apart from the inlet pipe (3), and an outlet pipe (5) being provided on the body (1). The water outlet pipe (5) stands on the outer surface of the cylinder (1) and communicates with the inner cavity of the cylinder (1). The cylinder (1) is also provided with a drain outlet (6), and the drain outlet (6) is spaced apart from the cylinder (1). The end cap (2) includes a middle ring (7), an inclined ring (8), a transition ring (9), and an outer ring (10) with a coaxial axis. The middle ring (7), the inclined ring (8), the transition ring (9), and the outer ring (10) are an integral structure. The outer edge of the middle ring (7) is first turned outward. Then, bend it inward at an angle. The ring formed by the inward bend is the inclined ring (8). The transition ring (9) is located on the outer edge of the inclined ring (8). The transition ring (9) is folded outward and then flattened. The ring formed by the flattening is the outer ring (10). The plane containing the transition ring (9), the middle ring (7), and the outer ring (10) is perpendicular to the axis of the cylinder (1). The plane containing the outer ring (10) is located on the outer side of the axial direction of the plane containing the middle ring (7). The plane containing the transition ring (9) is located on the outer side of the axial direction of the plane containing the middle ring (7). The plane is located inside the axial direction of the plane where the middle ring (7) is located; the axis of the inclined ring (8) and the axis of the cylinder (1) intersect inside the cylinder (1); the water inlet (4) is set on the inclined ring (8); the two ends of the cylinder (1) are respectively provided with a pressure cap (12) and a connecting piece (13), and the pressure cap (12) and the connecting piece (13) are connected by several tie rods (14), and the tie rods (14) are set outside the cylinder (1).

2. The pressure-resistant cylinder for pumps according to claim 1, characterized in that... The water inlet (4) has a water inlet pipe (11) located inside the inclined ring (8), that is, inside the cylinder (1), and the axis of the water inlet pipe (11) is perpendicular to the inclined ring (8).

3. The pump pressure-resistant cylinder according to claim 1 or 2, characterized in that... The axis of the water inlet (4) and the axis of the water outlet (5) are on the same plane.

4. The pressure-resistant cylinder for pumps according to claim 3, characterized in that... The cylinder (1) is placed horizontally, with the water inlet (4) and the water outlet pipe located above the axis of the cylinder (1), and the drain outlet (6) located below the axis of the cylinder (1).

5. The pressure-resistant cylinder for pumps according to claim 4, characterized in that... The length-to-diameter ratio of the cylinder (1) is greater than 3:2 and less than 5:

1.

6. A water pump using the pressure-resistant cylinder of any one of claims 1-5, comprising a cylinder (1), a motor (15) connected to the cylinder (1) via a coupling (13), wherein a drive shaft (16) of the motor (15) extends into the cylinder (1) and is connected to an impeller assembly (17) disposed within the cylinder (1), characterized in that... The cylinder (1) is the pump pressure-resistant cylinder according to any one of claims 1-5.

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