Diaphragm pump with separated pulling and pushing valve

Abstract

The invention discloses a pulling and pushing valve separation type diaphragm pump which comprises a pump body, a valve seat and a diaphragm bag with a bag cavity are arranged on the pump body, a piston part corresponding to the bag cavity is arranged on the diaphragm bag, an inlet valve sealing piece and an outlet valve sealing piece are installed on the valve seat, and a pulling body is arranged between the piston part and the inlet valve sealing piece. An ejector rod is arranged on the outlet valve sealing piece, the end of the ejector rod penetrates through the valve seat to enter the bag cavity, and when the piston part moves to expand the bag cavity, the piston part drives the pulling body to move along with the bag cavity, and the inlet valve sealing piece is pulled open; when the piston part moves to enable the bag cavity to contract, the piston part can make contact with the ejector rod in the moving process and push the ejector rod to move along with the ejector rod, and the outlet valve sealing piece is pushed away. According to the invention, the pulling body and the push rod are arranged; when the valve sealing pieces are adhered and the piston part of the diaphragm bag works, the inlet valve sealing piece can be forcibly pulled open or the outlet valve sealing piece can be forcibly pushed open, so that the valve sealing pieces are changed into a separated state from an adhered state.

Description

Technical Field

[0001] The invention belongs to the technical field of diaphragm pumps, and in particular relates to a pull-and-push valve separation diaphragm pump. Background Art

[0002] Diaphragm pumps, with their simple structure, easy operation, and simple maintenance, have found widespread application in many fields, most commonly in household appliances, industry, food, and medicine. Specifically, in household appliances, they can be used in water dispensers, water purifiers, coffee machines, and steam ovens. In industry, they can be used for transporting chemical raw materials, filling paints and inks, and adding chemicals to wastewater treatment. In the food and beverage industry, they can be used for transporting food ingredients, filling beverages, and metering and dispensing sauces. In the pharmaceutical industry, they can be used for transporting, metering, and filling liquid medicines in pharmaceutical production, as well as for the processing of biological agents.

[0003] The working process of a diaphragm pump is primarily through the reciprocating movement of the piston of the diaphragm bladder, causing the corresponding bladder cavity to expand or contract. When the bladder cavity expands, negative pressure is generated inside the bladder, opening the inlet valve seal and drawing fluid into the bladder cavity. When the bladder cavity contracts, high pressure is generated inside the bladder cavity, opening the outlet valve seal and forcing fluid out of the bladder cavity. After use and a period of downtime, the inlet and outlet valve seals are prone to sticking to the valve seats due to inactivity. At present, the technical means to prevent adhesion is to improve the size, thickness, and softness of the inlet and outlet valves in the circulation channel from the inlet to the outlet of the diaphragm pump so that the valves are easy to be pushed by the fluid medium, or to add auxiliary valve plates and springs. The purpose is to have a good seal to retain the fluid medium when the diaphragm pump is not in working state, so as to extend the storage and suspension time of the diaphragm pump. However, after a long period of storage or in an environment of high temperature, low temperature or alternating high and low temperatures, the fluid medium will gradually dry out and adhesion will occur. At the same time, the improved valves or added auxiliary valve plates and springs will also adhere to other components, making the adhesion strength greater and making the diaphragm pump more complicated, which fails to effectively solve the problem of valve adhesion.

[0004] In addition, the Chinese invention patent with authorization announcement number CN116753146A discloses an anti-adhesion diaphragm pump, which relates to the technical field of diaphragm pumps, including a pump body, the pump body including a combined connector and a valve plate bracket, the connector having an inlet pipe and an outlet pipe, and also including a water outlet, the water outlet being a water outlet cavity formed at the joint surface of the connector and the valve plate bracket, and a water outlet pipe outlet is provided in the water outlet cavity; a seal is also installed in the water outlet cavity, and a tower spring is connected between the seal and the installation cavity of the connector, and under the pressure of the tower spring, the seal closes the water outlet pipe outlet, and the water outlet pipe and the water outlet pipe outlet are closed; a push rod extending into the water outlet pipe outlet is fixed to the bottom surface of the seal. The contact surface between the seal and the water outlet is provided with a plurality of side top cavities distributed in a semi-circular shape, and two adjacent side top cavities are connected by an air duct. In the closed state, the air duct is in a closed state under the elastic action of the seal itself. The outer wall of the seal is provided with an air inlet groove, which is connected to one of the side top cavities, and the diameter of the side top cavity is smaller than the width of the contact surface between the seal and the water outlet. This invention patent solution makes it easier to open the seal during operation by arranging a push rod and a plurality of side top cavities distributed in a semi-circular shape on the bottom surface of the seal, thereby achieving the purpose of solving the adhesion problem between the seal and the water outlet.

[0005] The above patent (CN116753146A) can only play a role in separating when the adhesion strength is weak during use, such as the adhesion of the "seal 18" made of silicone rubber with adhesion properties for a long time, and the adhesion of dried water marks. This structural solution can play a good role in separation, but it is easy to fail to separate when some media with strong adhesion strength cause adhesion. For example, the conveying medium is a beverage containing sugar, cooked starch, protein, etc., especially viscous detergents, inks, etc. Such residual media have filling properties during gradual drying and solidification. And it has stronger adhesion strength. Because the compression ratio of the diaphragm pump is small, the compressed gas pressure is small, and the cross-sections of the air inlet groove, the side top cavity, and the air duct are very small, the probability of being filled and blocked is very high, and it is difficult for compressed gas to enter. It is difficult to pry up the valve seal from one side to separate the adhesion. In addition, viscous detergents, inks, etc. will also remain in the water outlet cavity, and dry and solidify faster than the residual medium in the diaphragm cavity. The medium with filling adhesion makes the valve bracket and the seal adhere to a larger range and higher strength, and the adhesion is more difficult to separate. Summary of the Invention

[0006] The object of the present invention is to provide a pull-and-push valve separation diaphragm pump with a simple structure, which can separate the adhered valve sealing sheet from the valve seat during the movement of the piston.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a diaphragm pump with a pulling and pushing valve, comprising a pump body, a valve seat and a diaphragm bag with a bag cavity provided on the pump body, a piston portion corresponding to the bag cavity provided on the diaphragm bag, an inlet valve sealing piece and an outlet valve sealing piece corresponding to the bag cavity installed on the valve seat, characterized in that: a pulling body is connected between the piston portion and the inlet valve sealing piece, a pushing rod is connected to the outlet valve sealing piece and the end of the pushing rod passes through the valve seat and enters the bag cavity, when the piston portion moves to expand the bag cavity, the piston portion drives the pulling body to follow the movement, and pulls open the inlet valve sealing piece; when the piston portion moves to shrink the bag cavity, the piston portion will contact the pushing rod during the movement process and push the pushing rod to follow the movement, and push the outlet valve sealing piece open.

[0008] Furthermore, one end of the pulling body is connected to the piston portion, and the other end is connected to the edge of the inlet valve sealing plate. One or more pulling bodies are provided.

[0009] Preferably, the piston, pulling body, and inlet valve sealing piece are integrally formed. Alternatively, the piston, pulling body, and inlet valve sealing piece are separate structures, with both ends of the pulling body fixedly connected to the piston and the inlet valve sealing piece respectively.

[0010] Furthermore, one end of the ejector rod is connected to the edge of the outlet valve sealing plate, and the other end extends into the bladder cavity and is suspended in the air. One or more ejector rods are provided. Preferably, the ejector rod and the outlet valve sealing plate are integrally formed. Alternatively, the ejector rod and the outlet valve sealing plate are separate structures, with one end of the ejector rod fixedly connected to the outlet valve sealing plate.

[0011] The present invention has the following beneficial effects: the structure of the present invention is simple and compact. Since a pulling body is provided between the piston portion of the diaphragm bag and the inlet valve sealing piece, and a pushing rod is provided on the outlet valve sealing piece, when the valve sealing piece becomes stuck, the diaphragm bag piston portion can forcibly pull the inlet valve sealing piece apart or push the outlet valve sealing piece apart during operation, thereby converting the valve sealing piece from a stuck state to a separated state.

[0012] The present invention separates stuck valve seals by forcefully pulling or pushing the valve seals open when the diaphragm piston moves. This design allows the valve seals to be separated immediately after adhesion occurs, when the isolation pump is activated. This provides effective separation and ensures the proper functioning of the isolation pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional schematic diagram of the capsule cavity in the present invention in a contracted state.

[0014] Figure 2 for Figure 1 Partial enlarged image.

[0015] Figure 3 It is a cross-sectional schematic diagram of the cyst cavity in the expanded state in the present invention.

[0016] Figure 4 for Figure 3 Partial enlarged image.

[0017] In the figure: 100, pump body; motor 200; 101, base; 102, diaphragm support; 103, valve seat; 104, end cover; 105, fluid inlet pipe; 106, fluid discharge pipe; 107, inlet valve sealing plate; 108, outlet valve sealing plate; 109, sac cavity; 110, diaphragm sac; 111, piston part; 112, transmission assembly; 113, pulling body; 114, push rod; 200, motor. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a pull-push valve separation diaphragm pump includes a pump body 100 and a motor 200.

[0020] Specifically, the pump body 100 includes a base 101, a diaphragm support 102, a valve seat 103, an end cap 104, a fluid inlet pipe 105, a fluid outlet pipe 106, an inlet valve seal 107, an outlet valve seal 108, and a diaphragm bladder 110 with a bladder cavity 109. Diaphragm bladder 110 is provided with a piston portion 111 corresponding to the bladder cavity. The motor 200 is connected to the pump body, and its output shaft is connected to the piston portion 111 via a transmission assembly 112.

[0021] A pulling body 113 is connected between the piston portion 111 and the inlet valve sealing plate 107, and a push rod 114 is connected to the outlet valve sealing plate 108. The end of the push rod passes through the fluid outlet on the valve seat and enters the sac cavity 109.

[0022] The working process of the present invention is as follows: when the motor 200 rotates, it can drive the piston part 111 to move back and forth.

[0023] Inhalation of fluid: When the motor 200 drives the piston 111 to move and expand the sac cavity 109, the piston 111 moves away from the valve seat 103. At this time, the piston 111 drives the pulling body 113 to follow and pull open the inlet valve sealing piece 107. The fluid entering the pipeline 105 is sucked into the sac cavity 109. In this process, the outlet valve sealing piece 108 forms a closed seal with the valve seat 103 under the action of its own elastic force and air pressure. The specific state is as follows Figure 3 、 4 shown.

[0024] Discharging fluid: When the motor 200 drives the piston part 111 to move and shrink the sac cavity 109, the piston part 111 moves closer to the valve seat 103, and contacts the end of the ejector rod 114 during the movement. As the piston part 111 continues to move, it drives the ejector rod 114 to follow and push open the outlet valve sealing piece 108; squeezing the fluid out of the sac cavity. During this process, the pulling body 113 slowly resets and loses its pulling effect, and the inlet valve sealing piece 107 rebounds freely. At the same time, the medium pushes the inlet valve sealing piece 107 to close and seal with the valve seat 103. The specific state is as follows. Figure 1 、 2 shown.

[0025] Since the present invention is provided with a pulling body 113 and a pushing rod 114, it can move with the piston portion 111 when the diaphragm pump is in operation. When the inlet valve sealing piece 107 becomes stuck, the piston portion 111 can drive the pulling body 113 to pull the stuck inlet valve sealing piece 107 away. When the outlet valve sealing piece 108 becomes stuck, the piston portion 111 can push the pushing rod 114 to push the stuck outlet valve sealing piece 108 away. In this way, the problem of the inlet valve sealing piece 107 and the outlet valve sealing piece 108 sticking to each other and the valve seat 103 is effectively solved.

[0026] Preferably, the pulling body 113 is connected to the piston at one end and to the edge of the inlet valve sealing plate at the other end. The ejection rod 114 is connected to the edge of the outlet valve sealing plate at one end and extends into the cavity and hangs in the air at the other end. This design allows the forced pulling and pushing forces to be applied to the edge in the event of adhesion, making it easier to pull and push open the small opening, allowing the medium to gradually enter and exit, and gradually fully open and return to normal.

[0027] More preferably, the piston, pulling body, and inlet valve sealing piece are integrally formed. The ejector rod and the outlet valve sealing piece are integrally formed. Of course, a split structure may be adopted as needed, that is, the piston part, pulling body, and inlet valve sealing piece are split structures, and the two ends of the pulling body are fixedly connected to the piston part and the inlet valve sealing piece respectively. The ejector rod and the outlet valve sealing piece are split structures, and one end of the ejector rod is fixedly connected to the outlet valve sealing piece. Specifically, the fixed connection method can be a snap connection or glue bonding.

[0028] In practical applications, the number of the pulling body and the pushing rod can be set according to actual conditions, such as one or more than one.

[0029] In addition, since the inlet and outlet valve seals and the piston are all made of silicone rubber, they have good elasticity and flexibility, and provide a good buffering effect during the pulling and pushing process. In addition, during design, the pulling and pushing amplitudes are generally smaller than the elastic amplitudes of the inlet and outlet valve seals; or the pulling and pushing forces are smaller than the yield strengths of the inlet and outlet valve seals. In this way, the inlet and outlet valve seals will not suffer irreversible deformation or tearing.

[0030] The above content is only used to illustrate the technical solution of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention made by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A diaphragm pump with a pull-and-push valve separation, comprising a pump body, a valve seat and a diaphragm bag with a bag cavity, a piston portion corresponding to the bag cavity, and an inlet valve sealing plate and an outlet valve sealing plate corresponding to the bag cavity mounted on the valve seat, characterized in that: A pulling body is connected between the piston part and the inlet valve sealing piece, and a pushing rod is connected to the outlet valve sealing piece, and the end of the pushing rod passes through the valve seat and enters the sac cavity. When the piston part moves to expand the sac cavity, the piston part drives the pulling body to move with it, pulling the inlet valve sealing piece open; when the piston part moves to shrink the sac cavity, the piston part will contact the pushing rod during the movement process and push the pushing rod to move with it, pushing the outlet valve sealing piece open.

2. The pull-and-push valve separation diaphragm pump according to claim 1, characterized in that: One end of the pulling body is connected to the piston portion, and the other end is connected to the edge of the inlet valve sealing plate.

3. The pull-and-push valve separation diaphragm pump according to claim 2, characterized in that: The pulling body is provided with one or more than one pulling body.

4. The pull-and-push valve separation diaphragm pump according to any one of claims 1 to 3, characterized in that: The piston part, the pulling body and the inlet valve sealing piece are integrally formed.

5. The pull-and-push valve separation diaphragm pump according to any one of claims 1 to 3, characterized in that: The piston part, the pulling body and the inlet valve sealing piece are separate structures, and the two ends of the pulling body are fixedly connected to the piston part and the inlet valve sealing piece respectively.

6. The pull-and-push valve separation diaphragm pump according to claim 1, characterized in that: One end of the ejector rod is connected to the edge of the outlet valve sealing plate, and the other end extends into the sac cavity and is suspended in the air.

7. The pull-and-push valve separation diaphragm pump according to claim 6, characterized in that: The ejection rod is provided with one or more than one.

8. The pull-and-push valve separation diaphragm pump according to claim 1, 6 or 7, characterized in that: The ejector rod and the outlet valve sealing piece are integrally formed.

9. The pull-and-push valve separation diaphragm pump according to claim 1, 6 or 7, characterized in that: The ejector rod and the outlet valve sealing piece are separate structures, and one end of the ejector rod is fixedly connected to the outlet valve sealing piece.

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