Piston pump capable of automatically feeding liquid

Abstract

The invention discloses a piston pump capable of automatically throwing liquid, and relates to the technical field of piston pumps, the piston pump capable of automatically throwing liquid comprises a shell, a piston assembly and a driving assembly, the shell is internally provided with a piston cavity and a driving cavity, the inner side of the shell is provided with a limiting groove, the piston assembly is arranged in the piston cavity, and the driving cavity is arranged in the piston cavity. The piston assembly is provided with a limiting block, the driving assembly is arranged in the driving cavity and connected with the piston assembly, and when the driving assembly drives the piston assembly to reciprocate in the horizontal direction of the shell, the limiting block reciprocates in the limiting groove so as to limit the piston assembly. According to the piston pump, the piston assembly is limited in the vertical direction through the limiting groove and the limiting block, so that the piston assembly does not shake or displace when reciprocating in the pump shell, and the stability of reciprocating operation of the piston assembly in the pump shell is improved.

Description

Technical Field

[0001] The invention relates to the technical field of piston pumps, in particular to a piston pump for automatically delivering liquid. Background Art

[0002] A piston pump, also known as an electric reciprocating pump, is a device that transports liquid through the reciprocating motion of a piston in a pump cylinder. Its working principle is based on the reciprocating motion of the piston. When the piston moves outward, the inlet check valve opens and the liquid is sucked into the pump chamber; when the piston is squeezed inward, the pressure in the pump chamber increases, the outlet check valve opens, and the liquid is pressed into the outlet pipeline. This process is repeated continuously, thereby achieving continuous delivery of liquid.

[0003] The piston in the prior art is connected to the motor output shaft through a connector, and the motor drives the piston to reciprocate. However, when the piston reciprocates in the pump housing, it will shake or shift, which reduces the stability of the piston running back and forth in the pump housing. Summary of the invention

[0004] The embodiment of the present invention provides a piston pump for automatically dispensing liquid, so as to solve the technical problem in the related art that the existing piston will shake or displace when moving back and forth in the pump housing, thereby reducing the stability of the piston moving back and forth in the pump housing.

[0005] An embodiment of the present invention provides a piston pump for automatically delivering liquid, comprising:

[0006] A housing, wherein a piston cavity and a driving cavity are provided in the housing, and a limiting groove is provided on the inner side of the housing;

[0007] A piston assembly, wherein the piston assembly is disposed in the piston cavity and a limit block is provided on the piston assembly;

[0008] A driving assembly, the driving assembly is disposed in the driving chamber and connected to the piston assembly;

[0009] When the driving assembly drives the piston assembly to reciprocate along the horizontal direction of the housing, the limiting block reciprocates in the limiting groove to limit the piston assembly.

[0010] In some embodiments, the piston assembly includes:

[0011] A pull rod, which is arranged in the piston cavity along a horizontal direction, and a groove is provided at the rear end of the pull rod and is connected to the driving assembly;

[0012] The piston head is arranged at the front end of the pull rod, and the pull rod drives the piston head to move back and forth along the horizontal direction of the shell.

[0013] In some embodiments, two Y-shaped sealing rings are provided on the piston head along the circumferential direction, and the lips of the two Y-shaped sealing rings are arranged in opposite directions.

[0014] In some embodiments, the drive assembly includes:

[0015] A motor, wherein a rotating shaft is provided above the motor, and the motor drives the rotating shaft to rotate;

[0016] A cam is arranged on the rotating shaft, a top end of the cam passes through the groove, and the rotating shaft drives the cam to rotate and drives the pull rod to move.

[0017] In some embodiments, a waterproof gasket is provided above the motor, a middle portion of the waterproof gasket passes through the rotating shaft, and a circumferential size of the waterproof gasket is larger than that of the cam.

[0018] In some embodiments, the piston pump for automatically dispensing liquid further comprises:

[0019] A pump cover is arranged at the front end of the shell, and a liquid inlet and a liquid outlet are arranged on the pump cover at intervals, and the liquid inlet and the liquid outlet form a guide channel with the piston cavity.

[0020] In some embodiments, rubber sealing caps are provided at the front ends of the liquid inlet and the liquid outlet.

[0021] In some embodiments, the piston pump for automatically dispensing liquid further comprises:

[0022] A valve plate is provided between the pump cover and the housing, and a liquid inlet hole and a liquid outlet hole are provided on the valve plate correspondingly, and the liquid inlet hole and the liquid outlet hole correspond one-to-one with the liquid inlet port and the liquid outlet port.

[0023] In some embodiments, both the liquid inlet and the liquid outlet are provided with umbrella-shaped one-way valves, and the setting direction of each umbrella-shaped one-way valve corresponds to the flow direction of the liquid.

[0024] In some embodiments, an O-ring is provided at the connection between the valve plate and the housing.

[0025] The beneficial effects brought about by the technical solution provided by the present invention include:

[0026] An embodiment of the present invention provides a piston pump for automatically dispensing liquid, including a shell, a piston assembly and a driving assembly. The shell is provided with a piston cavity and a driving cavity, the inner side of the shell is provided with a limiting groove, the piston assembly is arranged in the piston cavity, the piston assembly is provided with a limiting block, the driving assembly is arranged in the driving cavity and connected to the piston assembly, when the driving assembly drives the piston assembly to reciprocate in the horizontal direction of the shell, the limiting block reciprocates in the limiting groove to limit the piston assembly, the limiting block and the limiting groove limit the piston assembly in the vertical direction, so that the piston assembly will not shake or displace when reciprocating in the pump shell, thereby improving the stability of the piston assembly running back and forth in the pump shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A cross-sectional view of a piston pump for automatically dispensing liquid provided by an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the overall structure of a piston pump for automatically dispensing liquid provided by an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the specific structure of a piston pump for automatically dispensing liquid provided by an embodiment of the present invention;

[0031] Reference numerals:

[0032] 1. Shell; 11. Piston chamber; 12. Drive chamber; 13. Limiting groove;

[0033] 2. Piston assembly; 21. Limit block; 22. Pull rod; 221. Groove; 23. Piston head; 231. Y-shaped sealing ring;

[0034] 3. driving assembly; 31. motor; 311. rotating shaft; 32. cam;

[0035] 4. Waterproof gasket;

[0036] 5. Pump cover; 51. Liquid inlet; 52. Liquid outlet;

[0037] 6. Rubber sealing cap;

[0038] 7. Valve plate; 71. Liquid inlet hole; 72. Liquid outlet hole;

[0039] 8. Umbrella-shaped one-way valve;

[0040] 9. O-ring. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0042] The embodiment of the present invention provides a piston pump for automatically dispensing liquid, which can solve the technical problem in the related art that the existing piston will shake or displace when moving back and forth in the pump housing, thereby reducing the stability of the piston moving back and forth in the pump housing.

[0043] Figure 1 A piston pump for automatically dispensing liquid is provided in an embodiment of the present invention, comprising a housing 1, a piston assembly 2 and a drive assembly 3.

[0044] A piston cavity 11 and a driving cavity 12 are provided in the shell 1, a limiting groove 13 is provided on the inner side of the shell 1, the piston assembly 2 is provided in the piston cavity 11, a limiting block 21 is provided on the piston assembly 2, the driving assembly 3 is provided in the driving cavity 12 and connected to the piston assembly 2, when the driving assembly 3 drives the piston assembly 2 to reciprocate in the horizontal direction of the shell 1, the limiting block 21 reciprocates in the limiting groove 13 to limit the piston assembly 2.

[0045] The piston pump for automatically dispensing liquid provided in an embodiment of the present invention is provided with a shell, a piston assembly and a driving assembly. The shell is provided with a piston cavity and a driving cavity, the inner side of the shell is provided with a limiting groove, the piston assembly is provided in the piston cavity, the piston assembly is provided with a limiting block, the driving assembly is provided in the driving cavity and connected to the piston assembly, when the driving assembly drives the piston assembly to reciprocate in the horizontal direction of the shell, the limiting block reciprocates in the limiting groove to limit the piston assembly, the limiting groove enables the limiting block to reciprocate only in the horizontal direction of the shell, the limiting groove forms obstructions on both sides of the limiting block, so that the piston assembly will not shake or displace when reciprocating in the pump shell, thereby improving the stability of the piston assembly running back and forth in the pump shell.

[0046] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3As shown, the piston assembly 2 includes: a pull rod 22 and a piston head 23, the pull rod 22 is arranged in the piston cavity 11 along the horizontal direction, the rear end of the pull rod 22 is provided with a groove 221 and is connected to the driving assembly 3, the piston head 23 is arranged at the front end of the pull rod 22, the pull rod 22 drives the piston head 23 to reciprocate along the horizontal direction of the shell 1, and the driving assembly 3 drives the pull rod 22 to reciprocate back and forth in the shell 1 when rotating, and drives the piston head 23 to reciprocate back and forth in the piston cavity 11 when the pull rod 22 moves, when the pull rod 22 and the piston head 23 move backward, the liquid is sucked into the piston cavity 11 by the liquid pressure in the sealed environment, and when the pull rod 22 and the piston head 23 move forward, the liquid is discharged from the piston cavity 11 by the liquid pressure in the sealed environment. At the same time, the pull rod 22 is an integrated structure, which is easy to install. The integrated structure reduces its wear during operation and prolongs the service life of the piston assembly 2.

[0047] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3 As shown, two Y-shaped sealing rings 231 are provided on the piston head 23 along the circumferential direction, and the lips of the two Y-shaped sealing rings 231 are arranged back to back, the lip of one Y-shaped sealing ring 231 faces the direction of liquid inlet and outlet of the shell 1, and the lip of the other Y-shaped sealing ring 231 faces the pull rod 22. When the pull rod 22 and the piston head 23 move backward, the lip of the Y-shaped sealing ring facing the pull rod 22 opens and fits tightly against the side wall of the shell 1, which plays a good sealing role and can effectively prevent liquid from leaking out and flowing into the rear side of the pull rod 22. When the pull rod 22 and the piston head 23 move forward, the lip of the Y-shaped sealing ring facing the shell 1 opens and fits tightly against the side wall of the shell 1. The good sealing performance can effectively prevent liquid from flowing through the piston head 23. The Y-shaped sealing ring has a good sealing ability and can automatically compensate for wear. Even if it is worn after long-term use, it can still achieve a good sealing effect.

[0048] As an optional embodiment, in one embodiment of the invention, see Figure 2 and Figure 3As shown, the driving assembly 3 includes: a motor 31 and a cam 32. A rotating shaft 311 is provided above the motor 31. The motor 31 drives the rotating shaft 311 to rotate. The cam 32 is provided on the rotating shaft 311. The top of the cam 32 passes through the groove 221. The rotating shaft 311 drives the cam 32 to rotate and drives the pull rod 22 to move. The motor 31 drives the rotating shaft 311 to rotate, and the rotating shaft 311 further drives the cam 32 to rotate. When the cam 32 rotates, the top of the cam 32 generates a thrust on the pull rod 22 during the rotation process. Since the pull rod 22 is restricted in the piston chamber 11 and relies on its own weight to restore its original position, the cam 32 drives the pull rod 22 to move back and forth in the piston chamber 11.

[0049] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3 As shown, a waterproof gasket 4 is provided above the motor 31, the middle part of the waterproof gasket 4 passes through the rotating shaft 311, and the circumferential size of the waterproof gasket 4 is larger than the cam 32. A sealing ring is provided in the middle part of the waterproof gasket 4 to prevent liquid from flowing into the motor 31 through the rotating shaft 311 to protect the motor 31. The outer circumferential size of the waterproof gasket 4 is larger than the cam 32, and isolation is formed above the motor 31 to prevent liquid from penetrating into the motor 31. In addition, the waterproof gasket 4 also has a certain shock-absorbing and noise-reducing effect, which can absorb and disperse the vibration and impact during the operation of the motor 31, reduce the generation of noise, and improve the stability and service life of the operation of the present invention.

[0050] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3 As shown, the automatic liquid dispensing piston pump also includes: a pump cover 5, the pump cover 5 is arranged at the front end of the shell 1, and a liquid inlet 51 and a liquid outlet 52 are spaced apart on the pump cover 5, the liquid inlet 51 and the liquid outlet 52 form a guide channel with the piston cavity 11, when the pull rod 22 and the piston head 23 move backward, the liquid enters the piston cavity 11 through the liquid inlet 51, and when the pull rod 22 and the piston head 23 move forward, the liquid is discharged from the piston cavity 11 through the liquid outlet 52.

[0051] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3As shown, the front ends of the liquid inlet 51 and the liquid outlet 52 are each provided with a rubber sealing cap 6, and the rubber sealing cap 6 can fit tightly with the liquid inlet 51 and the liquid outlet 52, and can effectively prevent liquid leakage when the liquid flows through the liquid inlet 51 and the liquid outlet 52. The rubber sealing cap 6 can also be used to isolate the intrusion of debris and the intrusion of external factors such as moisture and air, thereby protecting the piston chamber 11 and the piston assembly 2.

[0052] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3 As shown, the automatic liquid-dispensing piston pump also includes: a valve plate 7, the valve plate 7 is arranged between the pump cover 5 and the housing 1, and a liquid inlet hole 71 and a liquid outlet hole 72 are correspondingly arranged on the valve plate 7, the liquid inlet hole 71 and the liquid outlet hole 72 correspond to the liquid inlet port 51 and the liquid outlet port 52 one by one, when the liquid enters the piston chamber 11, it needs to pass through the liquid inlet port 51 and the liquid inlet hole 71 in sequence, when the liquid flows out of the piston chamber 11, it needs to pass through the liquid outlet port 52 and the liquid outlet hole 72 in sequence, the liquid inlet hole 71, the liquid outlet hole 72 and the valve plate 7 are used to cut off the medium and ensure the sealing between the pump cover 5 and the housing 1.

[0053] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3 As shown, the liquid inlet hole 71 and the liquid outlet hole 72 are both provided with an umbrella-shaped one-way valve 8, and the setting direction of each umbrella-shaped one-way valve 8 corresponds to the flow direction of the liquid. The two umbrella-shaped one-way valves 8 are installed on the valve plate 7 in a positive direction and a reverse direction. The valve core of the umbrella-shaped one-way valve 8 provided at the liquid inlet hole 71 faces the liquid inlet hole 71. When the pull rod 22 and the piston head 23 move backward, the liquid is sucked in by the liquid pressure in the sealed environment, and the umbrella-shaped one-way valve moves to open the valve port successively, and the liquid flows through the liquid inlet hole 71 into the piston chamber 11; the umbrella-shaped one-way valve provided at the liquid outlet hole 72 opens the valve port. The valve core of the umbrella-shaped one-way valve 8 faces the piston chamber 11. When the pull rod 22 and the piston head 23 move forward, the umbrella-shaped one-way valve moves forward to open the valve port, and the liquid flows through the liquid outlet 72 and is discharged from the piston chamber 11. The umbrella-shaped one-way valve 8 has good sealing performance and can effectively prevent fluid leakage during reverse flow. Due to its special design, the umbrella-shaped one-way valve 8 generates relatively small resistance when the liquid flows in the forward direction, which helps to reduce the energy consumption of the system and improve the efficiency of liquid transmission. It also has high reliability and durability and can operate stably for a long time under harsh working environments.

[0054] As an optional embodiment, in one embodiment of the invention, see Figure 1 and Figure 3As shown, an O-ring 9 is provided at the connection between the valve plate 7 and the housing 1 to prevent liquid from leaking from the joint surface between the valve plate 7 and the housing 1. The O-ring 9 can be tightly filled in the sealing groove to seal the liquid flow through its elastic deformation to ensure the sealing of the system. The O-ring 9 is also used to prevent external residues such as dust, water, etc. from invading the interior of the housing 1 to protect the cleanliness and dryness of the internal environment of the housing 1.

[0055] The working principle of the piston pump for automatically dispensing liquid in the embodiment of the present invention is as follows:

[0056] The motor 31 of the driving chamber 12 rotates to drive the rotating shaft 311 to rotate, and the rotating shaft 311 further drives the cam 32 to rotate. When the cam 32 rotates, it can drive the pull rod 22 to move back and forth in the piston chamber 11. When the pull rod 22 moves backward in the piston chamber 11, the piston head 23 uses the liquid pressure of the sealed environment to suck the liquid into the piston chamber 11 through the liquid inlet 51. When the pull rod 22 moves forward in the piston chamber 11, the piston head 23 will The liquid is discharged from the piston chamber 11 through the liquid outlet 52, thereby realizing the liquid suction and discharge functions of the piston pump. When the pull rod 22 moves back and forth in the piston chamber 11, the limit block 21 follows the pull rod 22 to move back and forth in the limit groove 13. The limit groove 13 forms a barrier on both sides of the limit block 21, so that the piston assembly 2, i.e., the pull rod 22, will not shake or displace when moving back and forth in the pump housing, thereby improving the stability of the piston assembly 2 running back and forth in the pump housing.

[0057] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0058] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0059] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A piston pump for automatically delivering liquid, characterized in that: include: A housing (1), wherein a piston chamber (11) and a drive chamber (12) are provided in the housing (1), and a limiting groove (13) is provided on the inner side of the housing (1); A piston assembly (2), the piston assembly (2) being arranged in the piston chamber (11), and a limit block (21) being provided on the piston assembly (2); A drive assembly (3), the drive assembly (3) being disposed in the drive chamber (12) and connected to the piston assembly (2); When the driving assembly (3) drives the piston assembly (2) to move back and forth in the horizontal direction of the housing (1), the limiting block (21) moves back and forth in the limiting groove (13) to limit the piston assembly (2).

2. The piston pump for automatically dispensing liquid according to claim 1, characterized in that: The piston assembly (2) comprises: A pull rod (22), the pull rod (22) being arranged in the piston cavity (11) along a horizontal direction, the rear end of the pull rod (22) being provided with a groove (221) and being connected to the driving assembly (3); A piston head (23), wherein the piston head (23) is arranged at the front end of the pull rod (22), and the pull rod (22) drives the piston head (23) to move back and forth in the horizontal direction of the housing (1).

3. The piston pump for automatically dispensing liquid according to claim 2, characterized in that: Two Y-shaped sealing rings (231) are arranged on the piston head (23) along the circumferential direction, and the lips of the two Y-shaped sealing rings (231) are arranged in opposite directions.

4. The piston pump for automatically dispensing liquid according to claim 3, characterized in that: The driving assembly (3) comprises: A motor (31), wherein a rotating shaft (311) is provided above the motor (31), and the motor (31) drives the rotating shaft (311) to rotate; A cam (32), wherein the cam (32) is arranged on the rotating shaft (311), the top end of the cam (32) passes through the groove (221), and the rotating shaft (311) drives the cam (32) to rotate and drives the pull rod (22) to move.

5. The piston pump for automatically dispensing liquid according to claim 4, characterized in that: A waterproof gasket (4) is provided above the motor (31), the middle portion of the waterproof gasket (4) passes through the rotating shaft (311), and the circumferential size of the waterproof gasket (4) is larger than that of the cam (32).

6. The piston pump for automatically dispensing liquid according to claim 1, characterized in that: Also includes: A pump cover (5), the pump cover (5) being arranged at the front end of the housing (1), the pump cover (5) being provided with a liquid inlet (51) and a liquid outlet (52) spaced apart from each other, the liquid inlet (51) and the liquid outlet (52) forming a flow guide channel with the piston chamber (11).

7. The piston pump for automatically dispensing liquid according to claim 6, characterized in that: The front ends of the liquid inlet (51) and the liquid outlet (52) are both provided with rubber sealing caps (6).

8. The piston pump for automatically dispensing liquid according to claim 6, characterized in that: Also includes: A valve plate (7), the valve plate (7) being arranged between the pump cover (5) and the housing (1), the valve plate (7) being provided with a liquid inlet hole (71) and a liquid outlet hole (72) correspondingly, the liquid inlet hole (71) and the liquid outlet hole (72) corresponding one-to-one with the liquid inlet port (51) and the liquid outlet port (52).

9. The piston pump for automatically dispensing liquid according to claim 8, characterized in that: The liquid inlet hole (71) and the liquid outlet hole (72) are both provided with umbrella-shaped one-way valves (8), and the setting direction of each umbrella-shaped one-way valve (8) corresponds to the flow direction of the liquid.

10. The piston pump for automatically dispensing liquid according to claim 8, characterized in that: An O-type sealing ring (9) is provided at the connection between the valve plate (7) and the housing (1).

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