Pump core assembly and electromagnetic plunger pump

Abstract

According to the pump core assembly and the electromagnetic plunger pump, the pump core assembly comprises a pump core, a one-way valve and a tension spring, the pump core is provided with an inlet, a connecting channel and an outlet, and the inlet communicates with the outlet through the connecting channel; the one-way valve is arranged in the area where the outlet is located and comprises a connecting piece and a sealing piece, and the sealing piece is independently arranged relative to the connecting piece, connected with the connecting piece and used for controlling opening / closing of the outlet; the tension spring penetrates through the connecting channel and is provided with a first end and a second end, the first end is arranged in the area where the inlet is located and abuts against the pump core, the second end is arranged on the connecting piece in a sleeving mode and abuts against the connecting piece, and the tension spring can drive the sealing piece to block the outlet through the connecting piece. Therefore, the one-way valve and the tension spring can be assembled and connected conveniently, the situations that the tension spring and the one-way valve are not installed in place and the tension spring is distorted and deformed in the installation process are prevented, and normal work of the electromagnetic plunger pump with the pump core assembly can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field related to flow control, and in particular to a pump core assembly and an electromagnetic plunger pump. Background Art

[0002] Electromagnetic plunger pumps have been widely used in various fields, especially micro plunger pumps with their compact and precise structure. They can be used in coffee machines, steam generators and other products. When the electromagnetic plunger pump is working, the pump core reciprocates under the joint action of the electromagnetic coil and the pump core spring, sucking water from the water inlet and pumping it to the water outlet of the pump core through the pump core channel. The pump core check valve and the water outlet check valve in the electromagnetic plunger pump work together to open and close, realizing the electromagnetic plunger pump pumping water.

[0003] At present, the pump core check valve in the existing electromagnetic plunger pump is an integrated structure, so that when the pump core tension spring is assembled to the water outlet end of the pump core channel on the pump core through the pump core check valve, the elastic deformation of the pump core tension spring is utilized, and the pump core tension spring needs to be manually pulled out of the water outlet end of the pump core channel, and then the part of the pump core tension spring that extends out of the pump core channel is connected to the pump core check valve. However, due to the small size of the micro electromagnetic plunger pump, the pump core channel, pump core tension spring and pump core check valve of the pump core in the micro electromagnetic plunger pump are also small in size, making it particularly difficult to assemble one end of the pump core tension spring on the pump core through the pump core check valve, and problems such as improper installation and twisting and deformation of the pump core tension spring are prone to occur during the installation process, which will ultimately affect the normal operation of the micro electromagnetic plunger pump. Utility Model Content

[0004] Based on this, it is necessary to provide a pump core assembly and an electromagnetic plunger pump that can solve the above problems.

[0005] In order to solve the above technical problems, this application provides the following technical solutions:

[0006] A pump core assembly, characterized in that the pump core assembly comprises:

[0007] A pump core having an inlet, a connecting channel and an outlet, wherein the inlet and the outlet are connected through the connecting channel;

[0008] A one-way valve is arranged in the area where the outlet is located, the one-way valve comprises a connecting piece and a sealing piece, the sealing piece is independently arranged relative to the connecting piece and connected to the connecting piece, and is used to control the opening / closing of the outlet;

[0009] A tension spring is arranged to pass through the connecting channel, and the tension spring has a first end and a second end. The first end is arranged in the area where the inlet is located and abuts against the pump core, and the second end is sleeved on the connecting piece and abuts against the connecting piece. In addition, the tension spring can drive the sealing piece to block the outlet through the connecting piece.

[0010] It can be understood that when the pump core assembly is assembled, since the sealing member and the connecting member are independently arranged, the second end of the tension spring can be firstly mounted on the connecting member and abutted against the connecting member, and then the connecting member is connected to the sealing member. In this way, the assembly connection between the one-way valve and the tension spring can be facilitated, and the tension spring and the one-way valve can be prevented from being improperly installed and the tension spring from twisting and deforming during the installation process, thereby ensuring the normal operation of the electromagnetic plunger pump using the pump core assembly.

[0011] In one embodiment, the connecting member can be assembled to the sealing member in a plug-fit manner.

[0012] It is understandable that the assembly of the connector on the seal is specifically achieved by utilizing the plug-in fit between the connector and the seal, which facilitates the assembly of the connector and the seal and ensures the coaxiality of the two during assembly.

[0013] In one embodiment, the sealing member is provided with an insertion hole, and the connecting member portion can be inserted into the insertion hole;

[0014] The socket has a guide portion, and the guide portion can guide the connector to be inserted into the socket.

[0015] It can be understood that the guide portion on the sealing member is used to guide the connector to be inserted into the insertion hole, so that the connector can be easily inserted into the insertion hole of the sealing member.

[0016] In one embodiment, the guide portion is configured as a bell mouth, and the diameter of the bell mouth gradually decreases in a direction away from the tension spring.

[0017] In one embodiment, the plug-fitting portion between the sealing member and the connecting member is connected by ultrasonic welding.

[0018] It is understandable that on the basis of the plug-in fit between the seal and the connector, ultrasonic welding is used on the plug-in fit parts. In this way, the connection strength between the seal and the connector can be improved, and the seal can be prevented from falling off the connector due to external force.

[0019] In one of the embodiments, an end surface of the connecting member away from the tension spring and an end surface of the sealing member away from the tension spring are arranged on the same plane.

[0020] It can be understood that the end face of the connecting member away from the tension spring and the end face of the sealing member away from the tension spring are arranged on the same plane. In this way, the assembly of the sealing member on the connecting member can be limited to facilitate the assembly of the sealing member to the connecting member and increase the effective contact area between the connecting member and the sealing member, thereby improving the stability of the connection between the connecting member and the sealing member.

[0021] In one embodiment, the connecting member has a boss, and the second end portion can pass through the boss and abut against a stepped surface on the boss;

[0022] Wherein, the boss is arranged on an end of the connecting member away from the sealing member.

[0023] It can be understood that, by utilizing the abutment between the second end of the tension spring and the stepped surface on the boss, it is easy to assemble the second end of the tension spring on the boss of the connecting member and prevent the tension spring from falling off the connecting member.

[0024] In one embodiment, the cross section of the boss is configured to be rectangular.

[0025] In one embodiment, the diameter of the inlet is larger than the diameter of the connecting channel, and the pump core is formed with an abutment plane at a position where the inlet communicates with the connecting channel;

[0026] Wherein, the first end portion abuts against the abutting plane.

[0027] It can be understood that by utilizing the abutment plane on the pump core to abut the first end of the tension spring, it is convenient to position the first end of the tension spring on the pump core.

[0028] The present application also seeks protection for an electromagnetic plunger pump, comprising the pump core assembly described above.

[0029] Due to the application of the above solution, the present application has the following advantages compared with the prior art:

[0030] The pump core assembly and electromagnetic plunger pump for which protection is sought in the present application, when the pump core assembly is assembled, since the sealing member and the connecting member are independently arranged, the second end of the tension spring can be firstly mounted on the connecting member and abutted against the connecting member, and then the connecting member is connected to the sealing member. In this way, the assembly connection between the one-way valve and the tension spring can be facilitated, and the tension spring and the one-way valve can be prevented from being improperly installed and the tension spring from twisting and deforming during the installation process, thereby ensuring the normal operation of the electromagnetic plunger pump using the pump core assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A cross-sectional view of an electromagnetic plunger pump provided in one embodiment of the present application;

[0033] Figure 2 A cross-sectional view of a pump core assembly provided in one embodiment of the present application;

[0034] Figure 3 A cross-sectional view of a pump core provided in one embodiment of the present application;

[0035] Figure 4 A cross-sectional view of a one-way valve provided in one embodiment of the present application;

[0036] Figure 5 for Figure 4 Exploded diagram of .

[0037] Figure numerals: 100, pump core assembly; 200, electromagnetic plunger pump; 10, pump core; 11, inlet; 111, abutment plane; 12, connecting channel; 13, outlet; 20, one-way valve; 21, connecting piece; 211, boss; 2111, step surface; 22, sealing piece; 221, socket; 2211, guide portion; 30, tension spring; 31, first end portion; 32, second end portion. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0039] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0043] The pump core assembly 100 for which protection is sought in this application is applied in an electromagnetic plunger pump 200 .

[0044] like Figures 1 to 5 As shown, a pump core assembly 100 provided in an embodiment of the present application includes a pump core 10, a one-way valve 20 and a tension spring 30. The pump core 10 has an inlet 11, a connecting channel 12 and an outlet 13, and the inlet 11 and the outlet 13 are connected through the connecting channel 12; the one-way valve 20 is arranged in the area where the outlet 13 is located, and the one-way valve 20 includes a connector 21 and a sealing member 22. The sealing member 22 is independently arranged relative to the connector 21 and connected to the connector 21, and is used to control the on / off of the outlet 13; the tension spring 30 is arranged through the connecting channel 12, and the tension spring 30 has a first end 31 and a second end 32. The first end 31 is arranged in the area where the inlet 11 is located and abuts against the pump core 10, and the second end 32 is sleeved on the connector 21 and abuts against the connector 21, and the tension spring 30 can drive the sealing member 22 to block the outlet through the connector 21.

[0045] It can be understood that when the pump core assembly 100 is assembled, since the sealing member 22 and the connecting member 21 are independently arranged, the second end portion 32 of the tension spring 30 can be firstly mounted on the connecting member 21 and abutted against the connecting member 21, and then the connecting member 21 is connected to the sealing member 22. In this way, the assembly connection between the one-way valve 20 and the tension spring 30 can be facilitated, and the tension spring 30 can be prevented from being improperly installed between the one-way valve 20 and the tension spring 30 from being twisted and deformed during the installation process, thereby ensuring the normal operation of the electromagnetic plunger pump using the pump core assembly 100.

[0046] like Figure 2 As shown, in one embodiment, the diameter of the inlet 11 is larger than the diameter of the connecting channel 12, and the pump core 10 is formed with an abutting plane 111 at the position where the inlet 11 and the connecting channel 12 are connected; wherein the first end 31 abuts against the abutting plane 111. In other words, the abutting plane 111 on the pump core 10 abuts against the first end 31 of the tension spring 30, so that the first end 31 of the tension spring 30 can be easily positioned on the pump core 10.

[0047] like Figure 2 , Figure 4 As shown, in one embodiment, the connecting member 21 has a boss 211, and the second end 32 can pass through the boss 211 and abut against the stepped surface 2111 on the boss 211; wherein the boss 211 is arranged at one end of the connecting member 21 away from the sealing member 22. That is to say, the second end 32 of the tension spring 30 can pass through the boss 211 of the connecting member 21 and abut against the stepped surface 2111 on the boss 211, so that the second end 32 of the tension spring 30 can be easily assembled on the boss 211 of the connecting member 21, and the tension spring 30 can be prevented from falling off the connecting member 21; in this process, the second end 32 of the tension spring 30 and the boss 211 of the connecting member 21 are installed with a gap, that is, the tension spring 30 will not be squeezed or forced open during the assembly process of the tension spring 30 and the connecting member 21, so that the tension spring 30 and the connecting member 21 can be installed in place and the tension spring 30 can be prevented from being twisted and deformed during the installation process. It should be noted that the diameter of the second end 32 of the tension spring 30 abutting against the step surface 2111 on the boss 211 is smaller than the outer diameter of the boss 211 , so that the second end 32 can be positioned on the step surface 2111 of the boss 211 .

[0048] like Figure 3 As shown, in one embodiment, the cross section of the boss 211 is set to be rectangular.

[0049] like Figure 4 , Figure 5As shown, in one embodiment, the connector 21 can be assembled to the seal 22 in a plug-in manner. That is, the connector 21 is assembled to the seal 22 by plug-in fitting between the connector 21 and the seal 22, so that the connector 21 and the seal 22 can be assembled easily and the coaxiality of the two can be ensured during assembly.

[0050] like Figure 4 As shown, in one embodiment, the sealing member 22 is provided with an insertion hole 221, and a portion of the connector 21 can be inserted into the insertion hole 221; wherein the insertion hole 221 has a guide portion 2211, and the guide portion 2211 can guide the connector 21 to be inserted into the insertion hole 221. In other words, the guide portion 2211 on the sealing member 22 is used to guide the connector 21 to be inserted into the insertion hole 221, so that the connector 21 can be easily inserted into the insertion hole 221 of the sealing member 22.

[0051] In this embodiment, the guide portion 2211 is configured as a bell mouth, and the diameter of the bell mouth gradually decreases in a direction away from the tension spring 30 .

[0052] like Figure 4 , Figure 5 As shown, in one embodiment, the plug-in fitting part between the sealing member 22 and the connecting member 21 is connected by ultrasonic welding. That is to say, on the basis of the plug-in fitting between the sealing member 22 and the connecting member 21, ultrasonic welding is further used for the plug-in fitting part. In this way, the connection strength between the sealing member 22 and the connecting member 21 can be improved, and the sealing member 22 can be prevented from falling off from the connecting member 21 due to external force. Of course, for those skilled in the art, the plug-in fitting part between the sealing member 22 and the connecting member 21 is not limited to being connected by ultrasonic welding. The plug-in fitting part between the sealing member 22 and the connecting member 21 can also be connected by gluing, which will not be elaborated here.

[0053] like Figure 2 , Figure 4 As shown, in one embodiment, one end face of the connecting member 21 away from the tension spring 30 and one end face of the sealing member 22 away from the tension spring 30 are arranged on the same plane. In other words, the one end face of the connecting member 21 away from the tension spring 30 and one end face of the sealing member 22 away from the tension spring 30 are arranged on the same plane, so that the assembly of the sealing member 22 on the connecting member 21 can be limited, so as to facilitate the assembly of the sealing member 22 on the connecting member 21, and increase the effective contact area between the connecting member 21 and the sealing member 22, so as to improve the stability of the connection between the connecting member 21 and the sealing member 22.

[0054] The present application also seeks protection for an electromagnetic plunger pump 200 , comprising the pump core assembly 100 described above.

[0055] It should be noted that the specific structure and working principle of the electromagnetic plunger pump 200 can adopt existing conventional methods, which will not be elaborated here.

[0056] As can be seen from the above, when the pump core assembly 100 of the present application is assembled, first, the second end 32 of the tension spring 30 passes through the boss 211 of the connecting piece 21 and abuts against the step surface 2111 on the boss 211. The assembled tension spring 30 and the connecting piece 21 are successively inserted into the inlet 11 of the pump core 10 and the connecting channel 12 of the pump core 10. At this time, the abutment plane 111 is abutted against the first end 31 of the tension spring 30 to achieve positioning of the first end 31 of the tension spring 30 on the abutment plane 111 of the pump core 10. Afterwards, an end face of the connecting piece 21 away from the tension spring 30 is inserted into the insertion hole 221 of the sealing piece 22 until it is in the same plane as the end face of the sealing piece 22 away from the tension spring 30, and then the plug-in mating parts between the sealing piece 22 and the connecting piece 21 are welded.

[0057] In summary, the pump core assembly 100 and the electromagnetic plunger pump 200 for which protection is sought in the present application, when the pump core assembly 100 is assembled, since the seal 22 and the connecting member 21 are independently arranged, the second end 32 of the tension spring 30 can be firstly mounted on the connecting member 21 and abutted against the connecting member 21, and then the connecting member 21 is connected to the seal 22, so that the assembly connection between the one-way valve 20 and the tension spring 30 can be facilitated, and the tension spring 30 can be prevented from being improperly installed between the one-way valve 20 and the tension spring 30, and the tension spring 30 can be twisted and deformed during the installation process, thereby ensuring the normal operation of the electromagnetic plunger pump using the pump core assembly 100.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A pump core assembly, characterized in that: The pump core assembly (100) comprises: A pump core (10) having an inlet (11), a connecting channel (12) and an outlet (13), wherein the inlet (11) and the outlet (13) are connected via the connecting channel (12); a one-way valve (20) disposed in the area where the outlet (13) is located, the one-way valve (20) comprising a connecting piece (21) and a sealing piece (22), the sealing piece (22) being independently disposed relative to the connecting piece (21) and connected to the connecting piece (21) for controlling the on / off state of the outlet (13); A tension spring (30) is arranged to pass through the connecting passage (12), and the tension spring (30) has a first end (31) and a second end (32), wherein the first end (31) is arranged in the area where the inlet (11) is located and abuts against the pump core (10), and the second end (32) is sleeved on the connecting member (21) and abuts against the connecting member (21), and the tension spring (30) can drive the sealing member (22) to block the outlet through the connecting member (21).

2. The pump core assembly according to claim 1, characterized in that: The connecting member (21) can be assembled onto the sealing member (22) in a plug-fitting manner.

3. The pump core assembly according to claim 2, characterized in that: The sealing member (22) is provided with an insertion hole (221), and a portion of the connecting member (21) can be inserted into the insertion hole (221); The insertion hole (221) has a guide portion (2211), and the guide portion (2211) can guide the connecting member (21) to be inserted into the insertion hole (221).

4. The pump core assembly according to claim 3, characterized in that: The guide portion (2211) is configured as a bell mouth, and the diameter of the bell mouth gradually decreases in the direction away from the tension spring (30).

5. The pump core assembly according to claim 2, characterized in that: The plug-fitting parts between the sealing member (22) and the connecting member (21) are connected by ultrasonic welding.

6. The pump core assembly according to claim 2, characterized in that: An end surface of the connecting member (21) away from the tension spring (30) and an end surface of the sealing member (22) away from the tension spring (30) are arranged on the same plane.

7. The pump core assembly according to claim 1, characterized in that: The connecting member (21) has a boss (211), and the second end portion (32) can pass through the boss (211) and abut against a stepped surface (2111) on the boss (211); Wherein, the boss (211) is arranged on an end of the connecting member (21) away from the sealing member (22).

8. The pump core assembly according to claim 7, characterized in that: The cross section of the boss (211) is arranged to be rectangular.

9. The pump core assembly according to claim 1, characterized in that: The diameter of the inlet (11) is larger than the diameter of the connecting channel (12), and the pump core (10) is formed with an abutment plane (111) at a position where the inlet (11) and the connecting channel (12) are connected; Wherein, the first end portion (31) abuts against the abutment plane (111).

10. An electromagnetic plunger pump, characterized in that: The pump core assembly (100) comprises any one of claims 1-9.

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