Steady-flow multistage pump

Abstract

The utility model discloses a steady-flow multistage pump, which comprises a pump seat, a motor, a pump cover and an impeller, the pump seat and the pump cover are matched together to form a cavity, the motor is arranged on one side of the pump seat, the impeller is arranged on a shaft of the motor, the impeller is positioned in the cavity, a fluid director is arranged in the cavity, and the fluid director is arranged in the cavity. The fluid directors and the impellers are distributed in a staggered mode, the fluid directors divide the cavity into a water inlet cavity, a water outlet cavity and a backflow cavity, the water inlet cavity and the water outlet cavity are located on the two sides of the fluid directors respectively, and the backflow cavity and the water inlet cavity are located on the same side of the fluid directors. The piston is used for controlling opening and closing of the backflow cavity and the water inlet cavity, a spring is indirectly arranged on the pump cover, and the spring abuts against the piston. The steady-flow multi-stage pump has the following beneficial effects that the piston and the spring are adopted to replace a magnetic bead, and the piston and the spring are slightly influenced by liquid types and liquid temperatures, so that the steady-flow multi-stage pump is more reliable compared with the magnetic bead.

Description

Technical Field

[0001] The utility model relates to the field of pumps, in particular to a steady-flow multi-stage pump. Background Art

[0002] A steady-flow pump is a commonly used pump at present. Patent publication CN201820749727U discloses a steady-flow pump body assembly. This steady-flow pump body assembly relies on a spherical magnet (numbered 2b in the figure in the document) to trigger the reed switch induction to achieve steady flow. The magnetism of the magnet is affected by the properties of the conveyed fluid and the temperature of the fluid, so the magnet has a certain instability when in use. Therefore, the reliability of this structure of the steady-flow pump is relatively poor when in use. Utility Model Content

[0003] In response to the above problems, the present invention proposes a steady-flow multi-stage pump. This multi-stage pump uses pistons and springs to replace magnetic beads. The pistons and springs are very little affected by the liquid type and liquid temperature, so they are more reliable than magnetic beads.

[0004] The technical solutions adopted by this utility model are as follows:

[0005] A steady-flow multi-stage pump comprises a pump seat, a motor, a pump cover and an impeller, wherein the pump seat and the pump cover cooperate to form a cavity, the motor is arranged on one side of the pump seat, the impeller is arranged on the shaft of the motor, the impeller is located in the cavity, a deflector is provided in the cavity, the deflector and the impeller are arranged in an alternating manner, the deflector divides the cavity into a water inlet cavity, a water outlet cavity and a reflux cavity, the water inlet cavity and the water outlet cavity are respectively located on both sides of the deflector, the reflux cavity and the water inlet cavity are located on the same side of the deflector, a piston is slidably provided on the pump cover, the piston is used to control the opening and closing of the reflux cavity and the water inlet cavity, a spring is indirectly provided on the pump cover, and the spring presses against the piston.

[0006] In this type of steady-flow multi-stage pump, a piston is slidably mounted on the pump cover. The piston is used to block the passage between the reflux chamber and the water inlet chamber. When the piston blocks the two, the liquid in the reflux chamber cannot flow into the water inlet chamber. When the piston does not block the two, the liquid in the reflux chamber can flow into the water inlet chamber. A spring presses against the piston, and the spring has a tendency to drive the piston to move so that the piston does not block the passage between the water inlet chamber and the reflux chamber. When the liquid pressure in the reflux chamber reaches a certain value, the pressure exerted by the liquid on the piston will be greater than the elastic force exerted by the spring on the piston, causing the piston to block the passage between the reflux chamber and the water inlet chamber. Therefore, in this type of steady-flow multi-stage pump, the passage between the reflux chamber and the water inlet chamber is achieved by the spring and the piston. The performance of the spring is not affected by the properties of the delivered liquid, and the performance of the spring is very little affected by temperature (taking water as an example, in the common water temperature range of 0 to 50, the water temperature has almost no effect on the performance of the spring). Therefore, it is more reliable than magnetic beads.

[0007] Specifically, in this multi-stage pump, the deflector is integrated with the pump cover or pump head, forming a four-stage staggered arrangement between the deflector and the impeller, thereby creating a four-stage boosting structure between the water inlet and outlet chambers. When the deflector and impeller form a more staggered arrangement, more stages of boosting can be achieved between the water inlet and outlet chambers.

[0008] In this type of multi-stage pump, part of the liquid will flow into the reflux chamber during the process of flowing from the water inlet chamber to the water outlet chamber. In the initial stage, due to the elastic force of the spring, the piston does not block the passage between the reflux chamber and the water inlet chamber. This will cause the entire pump to have a relatively large pressure (i.e., pressurization) at the beginning, and the relative flow rate will decrease. As the amount of water flowing into the reflux chamber continues to increase, the water pressure in the reflux chamber will continue to increase, and the squeezing force of the water in the reflux chamber on the piston will also continue to increase. When the squeezing force of the water in the reflux chamber on the piston reaches a certain value, the liquid in the reflux chamber pushes the piston to move and block the channel between the two. The water in the reflux chamber cannot flow into the water inlet chamber, thereby losing the pressurization effect to achieve stable pressure delivery.

[0009] Specifically, in this multi-stage pump, the piston is a cylindrical piston, and a protrusion is provided on the outer wall of the cylindrical piston. The liquid in the reflux chamber pushes the piston to move through the protrusion on the piston.

[0010] Optionally, an insert is provided on the pump cover, and two sides of the insert are a reflux cavity and a water inlet cavity respectively.

[0011] Specifically in this type of multi-stage pump, an insert is arranged on the pump cover, and a through hole is opened on the insert. The two sides of the through hole are the reflux chamber and the water outlet chamber respectively. The two sides of the insert are the pressure stabilizing chamber and the reflux chamber respectively. The piston seals the through hole to achieve the opening and closing of the reflux chamber and the water outlet chamber.

[0012] Optionally, a mounting seat is further included, wherein the mounting seat is arranged on the pump cover, the pump cover is provided with a blind hole, and the piston is slidably fitted with the blind hole.

[0013] Specifically, the mounting seat is detachably mounted on the pump cover by means of threaded engagement. In order to ensure the sealing between the pump cover and the mounting seat, a sealing ring is provided between the pump cover and the mounting seat.

[0014] Optionally, a connecting cylinder is further included, and both ends of the connecting cylinder are sealed together with the pump seat and the pump cover respectively.

[0015] Optionally, the spring is located inside the piston.

[0016] The piston is cylindrical, with one end sealed. The other end (i.e., the end at the barrel's mouth) slides against a guide post. A protective cavity is formed between the guide post and the piston, housing a spring. This sealed cavity protects the spring. One end of the spring rests against the piston (i.e., the barrel's bottom), while the other end rests against the guide post. Because one end of the piston is guided by the mounting base, while the other end is guided by the guide post, both ends of the piston are well guided, ensuring stable movement without stagnation.

[0017] Specifically, the guide column is arranged on the insert, and is a T-shaped guide column. The central axes of the guide column, the spring, and the piston are on the same straight line.

[0018] Optionally, both the pump seat and the pump cover are provided with blockages.

[0019] The pump cover has an inlet and the pump base has an outlet. During use, liquid (usually water) enters the water inlet chamber through the inlet and leaves the water outlet chamber through the outlet. Plugs are detachably attached to the inlet and outlet, allowing them to be removed when the pump is needed.

[0020] Optionally, a plug is provided on the pump cover.

[0021] Optionally, a sealing sleeve is further included, which is arranged between the shaft of the motor and the pump seat.

[0022] The function of the sealing sleeve is to ensure the sealing between the shaft and the pump seat.

[0023] Optionally, the pump seat and the housing of the motor are detachably fitted together by bolts.

[0024] The pump base and the motor housing are detachably fitted together by bolts to facilitate quick disassembly when needed.

[0025] The beneficial effect of the utility model is that the piston and the spring are used to replace the magnetic beads, and the piston and the spring are very little affected by the type of liquid and the temperature of the liquid, so they are more reliable than the magnetic beads. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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.

[0027] Figure 1 This is a schematic diagram of the structure of a steady-flow multi-stage pump;

[0028] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0029] Figure 3 This is a schematic diagram of the working principle of a steady-flow multi-stage pump.

[0030] The reference numerals in the figure are: 1, motor; 101, shaft; 2, pump seat; 3, water outlet chamber; 4, plug; 5, sealing sleeve; 6, connecting cylinder; 7, deflector; 8, impeller; 9, plug; 10, water inlet chamber; 11, pump cover; 12, mounting seat; 13, bolt; 14, spring; 14, spring; 15, piston; 16, protrusion; 17, sealing ring; 18, guide column; 19, insert; 20, reflux chamber. DETAILED DESCRIPTION

[0031] 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.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. 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.

[0033] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. 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 figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0034] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in the figure, a steady-flow multi-stage pump includes a pump base 2, a motor 1, a pump cover 11 and an impeller 8. The pump base 2 and the pump cover 11 are matched together to form a cavity. The motor 1 is arranged on one side of the pump base 2, and the impeller 8 is arranged on the shaft 101 of the motor 1. The impeller 8 is located in the cavity. A deflector 7 is provided in the cavity. The deflector 7 and the impeller 8 are staggered and distributed. The deflector 7 divides the cavity into an inlet chamber 10, an outlet chamber 3 and a reflux chamber 20. The inlet chamber 10 and the outlet chamber 3 are respectively located on both sides of the deflector 7, and the reflux chamber 20 and the inlet chamber 10 are located on the same side of the deflector 7. A piston 15 is slidably provided on the pump cover 11. The piston 15 is used to control the opening and closing of the reflux chamber 20 and the water inlet chamber 10. A spring 14 is indirectly provided on the pump cover 11, and the spring 14 presses against the piston 15.

[0035] In this steady-flow multi-stage pump, the piston 15 is slidably mounted on the pump cover 11. The piston 15 is used to block the passage between the reflux chamber 20 and the water inlet chamber 10. When the piston 15 blocks the two, the liquid in the reflux chamber 20 cannot flow to the water inlet chamber 10. When the piston 15 does not block the two, the liquid in the reflux chamber 20 can flow to the water inlet chamber 10. The spring 14 presses against the piston 15, and the spring 14 has a tendency to drive the piston 15 to move so that the piston 15 does not block the passage between the water inlet chamber 10 and the reflux chamber 20. When the liquid pressure in the reflux chamber 20 reaches a certain value, the pressure of the liquid on the piston 15 will be greater than the elastic force of the spring 14 on the piston 15, so that the piston 15 blocks the passage between the reflux chamber 20 and the water inlet chamber 10. Therefore, in this type of steady-flow multi-stage pump, the connection and closing between the reflux chamber 20 and the water inlet chamber 10 is achieved by the spring 14 and the piston 15. The performance of the spring 14 is not affected by the properties of the delivered liquid, and the performance of the spring 14 is very little affected by temperature (taking water as an example, in the common water temperature range of 0 to 50, the water temperature has almost no effect on the performance of the spring 14), so it is more reliable than magnetic beads.

[0036] Specifically, in this multi-stage pump, the deflector 7 cooperates with the pump cover 11 or pump head to form a four-stage staggered arrangement between the deflector 7 and the impeller 8, thereby forming a four-stage boosting structure between the water inlet chamber 10 and the water outlet chamber 3. When more stages of staggered arrangement are formed between the deflector 7 and the impeller 8, more stages of boosting can be achieved between the water inlet chamber 10 and the water outlet chamber 3.

[0037] Combined with attachment Figure 3 As shown in FIG, in this multi-stage pump, when the liquid flows from the water inlet chamber 10 to the water outlet chamber 3, a part of it will flow into the reflux chamber 20 (the direction of water flow is shown in the attached FIG). Figure 3 As shown by the arrow in the figure), in the initial stage, due to the elastic force of the spring 14, the protrusion 16 on the piston 15 does not block the through hole on the insert 19 (with the attached Figure 3 As shown in the figure, the spring 14 has a tendency to push the piston 15 downward), so that the reflux chamber 20 and the water inlet chamber 10 are in a conductive state, which will make the entire pump have a relatively large pressure (i.e., pressurization) at the beginning, and the relative flow rate will decrease. When the water flowing into the reflux chamber 20 continues to increase, the water pressure in the reflux chamber 20 will continue to increase, and the squeezing force of the water in the reflux chamber 20 on the protrusion 16 on the piston 15 will also continue to increase. When the squeezing force of the water in the reflux chamber 20 on the piston 15 reaches a certain value, the liquid in the reflux chamber 20 pushes the piston 15 to move and blocks the channel between the two (i.e., with the attached Figure 3 As shown in FIG, the piston 15 moves upward), the water in the reflux chamber 20 cannot flow into the water inlet chamber 10, thereby losing the pressurization effect to achieve stable pressure delivery.

[0038] Specifically, in this multi-stage pump, the piston 15 is a cylindrical piston 15 , and a protrusion 16 is provided on the outer wall of the cylindrical piston 15 . The liquid in the reflux chamber 20 pushes the piston 15 to move through the protrusion 16 on the piston 15 .

[0039] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in , an insert 19 is provided on the pump cover 11, and two sides of the insert 19 are a reflux cavity and a water inlet cavity respectively.

[0040] Specifically in this type of multi-stage pump, the insert 19 is arranged on the pump cover 11, and a through hole is opened on the insert 19. The two sides of the through hole are the reflux chamber 20 and the water outlet chamber 3 respectively. The two sides of the insert 19 are the pressure stabilizing chamber and the reflux chamber 20 respectively. The piston 15 seals the through hole to achieve the opening and closing of the reflux chamber 20 and the water outlet chamber 3.

[0041] The specific insert 19 can be an insert 19 made of metal copper.

[0042] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in , it also includes a mounting seat 12, which is arranged on the pump cover 11. The pump cover 11 is provided with a blind hole, and the piston 15 is slidably matched with the blind hole. The blind hole on the specific pump cover 11 is a circular blind hole.

[0043] Specifically, the mounting seat 12 is detachably mounted on the pump cover 11 by means of threaded engagement. In order to ensure the sealing between the pump cover 11 and the mounting seat 12 , a sealing ring 17 is provided between the pump cover 11 and the mounting seat 12 .

[0044] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in , it also includes a connecting cylinder 6, and the two ends of the connecting cylinder 6 are respectively sealed with the pump base 2 and the pump cover 11. Specifically, a sealing ring 17 is provided between the connecting cylinder 6 and the pump base 2, and a sealing ring 17 is provided between the connecting cylinder 6 and the pump cover 11.

[0045] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in FIG, the spring 14 is located within the piston 15.

[0046] Specifically, the piston 15 is barrel-shaped, with one end of the piston 15 sealed. The other end of the piston 15 (i.e., the end at the barrel's mouth) is slidably engaged with a guide post 18. A protective cavity is formed between the guide post 18 and the piston 15. The spring 14 is located within the protective cavity. This sealed protective cavity protects the spring 14. One end of the spring 14 abuts the piston 15 (i.e., the barrel's bottom), while the other end of the spring 14 abuts the guide post 18. Because one end of the piston 15 is guided by the mounting seat 12, and the other end of the piston 15 is guided by the guide post 18, both ends of the piston 15 are well guided, ensuring stable movement of the piston 15 without stagnation.

[0047] Specifically, the guide post 18 is disposed on the insert 19 . The guide post 18 is a T-shaped guide post 18 . The central axes 101 of the guide post 18 , the spring 14 , and the piston 15 are on the same straight line.

[0048] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in FIG, both the pump seat 2 and the pump cover 11 are provided with a plug 4.

[0049] The pump cover 11 is provided with a water inlet, and the pump base 2 is provided with a water outlet. During use, liquid (typically water) enters the water inlet chamber 10 through the water inlet and leaves the water outlet chamber 3 through the water outlet. Plugs 4 are detachably mounted on the water inlet and outlet, and can be removed from the water inlet and outlet when the pump is needed for pumping operations.

[0050] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in FIG, a plug 9 is provided on the pump cover 11.

[0051] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in , it also includes a sealing sleeve 5, which is arranged between the shaft 101 of the motor 1 and the pump base 2.

[0052] The function of the sealing sleeve 5 is to ensure the sealing between the shaft 101 and the pump seat 2.

[0053] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown in FIG, the pump base 2 and the housing of the motor 1 are detachably fitted together by bolts 13.

[0054] The pump base 2 and the housing of the motor 1 are detachably fitted together by bolts 13 in order to facilitate quick disassembly when needed.

[0055] The above-described embodiments only express some embodiments of the present invention. The description is relatively specific and detailed, but it should not 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 described in the above-mentioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this utility model should be included in the scope of protection of this utility model.

Claims

1. A steady-flow multi-stage pump, comprising a pump base, a motor, a pump cover, and an impeller, wherein the pump base and the pump cover cooperate to form a cavity, the motor is disposed on one side of the pump base, the impeller is disposed on the shaft of the motor, the impeller is located in the cavity, a flow guide is disposed in the cavity, and the flow guide and the impeller are staggered and distributed, characterized in that: The deflector divides the cavity into a water inlet chamber, a water outlet chamber and a reflux chamber. The water inlet chamber and the water outlet chamber are respectively located on both sides of the deflector, and the reflux chamber and the water inlet chamber are located on the same side of the deflector. A piston is slidably provided on the pump cover, and the piston is used to control the opening and closing of the reflux chamber and the water inlet chamber. A spring is indirectly provided on the pump cover, and the spring presses against the piston.

2. A steady-flow multi-stage pump according to claim 1, characterized in that: An insert is provided on the pump cover, and two sides of the insert are respectively a reflux cavity and a water inlet cavity.

3. A steady-flow multi-stage pump according to claim 1, characterized in that: The pump also includes a mounting seat, which is arranged on the pump cover. The pump cover is provided with a blind hole, and the piston is slidably matched with the blind hole.

4. A steady-flow multi-stage pump according to claim 1, characterized in that: It also includes a connecting cylinder, the two ends of which are respectively sealed with the pump seat and the pump cover.

5. A steady-flow multi-stage pump according to claim 1, characterized in that: The spring is located within the piston.

6. A steady-flow multi-stage pump according to claim 1, characterized in that: The pump seat and the pump cover are both provided with plugs.

7. A steady-flow multi-stage pump according to claim 1, characterized in that: The pump cover is provided with a plug.

8. A steady-flow multi-stage pump according to claim 1, characterized in that: It also includes a sealing sleeve, which is arranged between the shaft of the motor and the pump seat.

9. A steady-flow multi-stage pump according to claim 1, characterized in that: The pump seat and the housing of the motor are detachably fitted together by bolts.

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