Piston pump capable of automatically feeding liquid

Abstract

The utility model discloses a piston pump that automatically puts in liquid relates to piston pump technical field, said piston pump that automatically puts in liquid includes shell, piston subassembly and drive subassembly, said shell is equipped with piston chamber and drive chamber inside, said shell is equipped with spacing groove inside, said piston subassembly is equipped with said piston chamber inside, said drive chamber is equipped with said spacing groove inside, said piston subassembly is equipped with said spacing groove inside. 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 disclosed by the utility model, 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 moving back and forth in the pump shell, and the stability of the piston assembly moving back and forth in the pump shell is improved.

Description

Technical Field

[0001] The utility model 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, sucking the liquid into the pump chamber; when the piston squeezes inward, the pressure in the pump chamber increases, the outlet check valve opens, and the liquid is pressed into the outlet pipe. 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 via a connector, and the motor drives the piston to reciprocate. However, the piston will shake or shift when reciprocating in the pump housing, reducing the stability of the piston's back-and-forth movement in the pump housing. Utility Model Content

[0004] The embodiment of the present utility model 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 running back and forth in the pump housing.

[0005] The present invention provides a piston pump for automatically delivering liquid, comprising:

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

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

[0008] a drive assembly disposed in the drive chamber and connected to the piston assembly;

[0009] When the driving assembly drives the piston assembly to move back and forth along the horizontal direction of the housing, the limiting block moves back and forth in the limiting groove to limit the piston assembly.

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

[0011] A pull rod, the pull rod being arranged in the piston cavity along a horizontal direction, the rear end of the pull rod being provided with a groove and being connected to the drive 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 back-to-back 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 provided 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 provided at the front end of the housing. A liquid inlet and a liquid outlet are provided on the pump cover at intervals. 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] The valve plate is arranged between the pump cover and the housing, and the valve plate is correspondingly provided with a liquid inlet hole and a liquid outlet hole, and the liquid inlet hole and the liquid outlet hole correspond one-to-one with the liquid inlet and the liquid outlet.

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

[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 utility model include:

[0026] The utility model discloses an automatic liquid feeding piston pump, which comprises a shell, a piston assembly and a driving assembly, a piston cavity and a driving cavity are arranged in the shell, a limiting groove is arranged on the inner side of the shell, the piston assembly is arranged in the piston cavity, a limiting block is arranged on the piston assembly, the driving assembly is arranged in the driving cavity and is connected with 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 does not shake or displace when reciprocating in the pump shell, and the stability of the piston assembly when reciprocating in the pump shell is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0028] Figure 1 The utility model discloses an automatic liquid feeding piston pump's cross section view is provided for the embodiment of the utility model;

[0029] Figure 2 The utility model discloses an automatic liquid feeding piston pump's whole structure schematic view is provided for the embodiment of the utility model;

[0030] Figure 3 The utility model discloses an automatic liquid feeding piston pump's specific structure schematic view is provided for the embodiment of the utility model;

[0031] Reference signs:

[0032] 1, shell;11, piston cavity;12, driving cavity;13, limiting groove;

[0033] 2, piston assembly;21, limiting block;22, pull rod;221, recess;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] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions 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 embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.

[0042] The embodiment of the present utility model 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 running back and forth in the pump housing.

[0043] Figure 1 The utility model provides an automatic liquid dispensing piston pump, which includes a housing 1, a piston assembly 2 and a drive assembly 3.

[0044] A piston chamber 11 and a drive chamber 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 chamber 11, a limiting block 21 is provided on the piston assembly 2, the driving assembly 3 is provided in the driving 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 shell 1, the limiting block 21 moves back and forth in the limiting groove 13 to limit the piston assembly 2.

[0045] The embodiment of the present utility model provides a piston pump for automatically dispensing liquid, which is provided with a shell, a piston assembly and a drive assembly. The shell is provided with a piston cavity and a drive 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 drive assembly is provided in the driving cavity and connected to the piston assembly, when the drive assembly drives the piston assembly to move back and forth in the horizontal direction of the shell, the limiting block moves back and forth in the limiting groove to limit the piston assembly, the limiting groove enables the limiting block to move back and forth 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 moving back and forth 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 a utility model implementation, seeFigure 1 and Figure 3 As 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 in the horizontal direction. The rear end of the pull rod 22 is provided with a groove 221 and is connected to the drive 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. When the drive assembly 3 rotates, the pull rod 22 is driven to reciprocate back and forth in the shell 1. When the pull rod 22 moves, the piston head 23 is driven to reciprocate back and forth in the piston cavity 11. 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. 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 extends the service life of the piston assembly 2.

[0047] As an optional embodiment, in a utility model implementation, 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 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 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 a utility model implementation, 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. 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 confined 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 a utility model implementation, 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, and 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, forming an isolation 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 utility model.

[0050] As an optional embodiment, in a utility model implementation, 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 diversion 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. 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 a utility model implementation, see Figure 1 and Figure 3As shown in the figure, the front end of the liquid inlet 51 and the liquid outlet 52 is provided with a rubber sealing cap 6, which can be tightly attached to 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 prevent the invasion of sundries and the intrusion of external factors such as moisture and air, thereby protecting the piston cavity 11 and the piston assembly 2.

[0052] As an optional embodiment, in one utility model implementation, referring to Figure 1 and Figure 3 As shown in the figure, the automatic liquid dispensing piston pump further comprises a valve plate 7 provided between the pump cover 5 and the shell 1, and the valve plate 7 is provided with a liquid inlet hole 71 and a liquid outlet hole 72 corresponding to the liquid inlet hole 71 and the liquid outlet hole 72. When the liquid enters the piston cavity 11, it needs to pass through the liquid inlet hole 51 and the liquid inlet hole 71 in turn, and when the liquid flows out of the piston cavity 11, it needs to pass through the liquid outlet hole 52 and the liquid outlet hole 72 in turn. 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 shell 1.

[0053] As an optional embodiment, in one utility model implementation, referring to Figure 1 and Figure 3 As shown in the figure, the liquid inlet hole 71 and the liquid outlet hole 72 are provided with umbrella-shaped one-way valves 8, and the setting direction of each umbrella-shaped one-way valve 8 corresponds to the liquid flow direction. Two umbrella-shaped one-way valves 8 are arranged on the valve plate 7 in opposite directions. The valve core of the umbrella-shaped one-way valve 8 provided on the liquid inlet hole 71 faces the liquid inlet hole 71. When the pull rod 22 and the piston head 23 move backward, the umbrella-shaped one-way valve moves to open the valve port in turn under the liquid pressure in the sealed environment, and the liquid flows through the liquid inlet hole 71 into the piston cavity 11. The valve core of the umbrella-shaped one-way valve 8 provided on the liquid outlet hole 72 faces the piston cavity 11. When the pull rod 22 and the piston head 23 move forward, the umbrella-shaped one-way valve moves to open the valve port in advance, and the liquid flows through the liquid outlet hole 72 to discharge the piston cavity 11. The umbrella-shaped one-way valve 8 has good sealing performance and can effectively prevent fluid leakage when flowing in the opposite direction. Due to its special design, the umbrella-shaped one-way valve 8 has relatively small resistance when the liquid flows in the positive 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 in harsh working environment.

[0054] As an optional embodiment, in one utility model implementation, referring to 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 and 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 debris such as dust and water from invading the interior of the housing 1, thereby protecting the cleanliness and dryness of the internal environment of the housing 1.

[0055] The working principle of the piston pump for automatically delivering liquid in the embodiment of the present utility model 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 blockage on both sides of the limit block 21, so that the piston assembly 2, that is, 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" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, 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 an indirect connection through an intermediate medium, or it can be internal communication between 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 application, relational terms such as "first" and "second", and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0059] The above description is merely that of the specific embodiments of the present application, and enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

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 cavity (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, a groove (221) being provided at a rear end of the pull rod (22) and being connected to the drive assembly (3); A piston head (23) is provided 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 provided 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), 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) is provided at the front end of the housing (1). A liquid inlet (51) and a liquid outlet (52) are provided on the pump cover (5) at intervals. The liquid inlet (51) and the liquid outlet (52) form a guide channel with the piston chamber (11).

7. The automatic liquid dispensing piston pump 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 to 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 (71) and the liquid outlet (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 liquid flow direction.

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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