Hydraulic diaphragm metering pump

Abstract

The utility model discloses a hydraulic diaphragm metering pump which comprises a pump body and further comprises an isolation mechanism, the isolation mechanism is arranged at the end of the pump body and comprises a connecting base, a diaphragm, a through pipe, an end column, an isolation cavity, a fixing ring, a one-way valve A and a one-way valve B, a connecting base is arranged on one side of the liquid discharging end of the pump body, a diaphragm located in the connecting base is installed at the acting end of the pump body, when the diaphragm conducts extrusion action, part of liquid in the connecting base is discharged along the liquid discharging pipe, the other part of liquid enters the isolation cavity from the one-way valve A, and when the diaphragm conducts adsorption action, the diaphragm is separated from the liquid discharging pipe. Liquid is sucked into the connecting base, meanwhile, part of the liquid in the isolation cavity is filtered by the filter screen and then sucked into the connecting base, through the structural design of the isolation cavity, the circulation space can be increased in the liquid circulation process, the liquid entering the isolation cavity is filtered, and therefore the liquid circulation efficiency is improved. And meanwhile, impurities are prevented from accumulating in the connecting seat for a long time to affect pump body flow and diaphragm quality.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, and particularly relates to a hydraulic diaphragm metering pump. Background Art

[0002] The hydraulic diaphragm metering pump, also known as a kind of plunger diaphragm metering pump, is a metering pump designed by combining the characteristics of a plunger metering pump and a diaphragm metering pump. The part of this metering pump in contact with the measured medium is a diaphragm, and the driving part is a hydraulic plunger. Since different materials can be selected for the diaphragm according to different measured media, and the hydraulic drive can meet the need of high-pressure metering, the application fields and working pressure of the plunger diaphragm metering pump have been greatly improved, and it is widely used.

[0003] The existing hydraulic diaphragm metering pump has the following drawbacks when in use: The diaphragm is one of the core components inside the hydraulic diaphragm metering pump, and it is directly connected to the inside of the liquid mass flow cavity. During the operation of the hydraulic diaphragm metering pump, the liquid mass passes through the inside of the liquid cavity and is discharged. When the liquid mass contains impurities, during the operation of the pump body, the impurities are easily retained inside the liquid cavity, and after accumulation and blockage, the liquid discharge efficiency is affected. At the same time, the diaphragm is easily damaged during the movement of the diaphragm. For this reason, we propose a hydraulic diaphragm metering pump. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a hydraulic diaphragm metering pump. Through the isolation mechanism arranged inside the pump body, it can play a role in collecting and isolating, isolating impurities inside the isolation cavity, and effectively solving the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A hydraulic diaphragm metering pump includes a pump body and also includes an isolation mechanism. The isolation mechanism is arranged at the end of the pump body. The isolation mechanism includes a connection seat, a diaphragm, a through pipe, an end post, an isolation cavity, a fixing ring, check valve A and check valve B. A connection seat is arranged on one side of the liquid discharge end of the pump body, and a diaphragm located inside the connection seat is installed at the operating end of the pump body. A through pipe is fixedly connected to the surface of the connection seat away from the pump body. The end of the through pipe is detachably connected to an end post, and an isolation cavity is arranged inside the through pipe. A fixing ring is fixedly connected to the inside of the through pipe near the connection seat. Check valve A and check valve B are respectively installed inside the fixing ring. A filter screen is arranged on the surface of the fixing ring near check valve B.

[0007] Furthermore, a liquid inlet pipe is fixedly connected to the bottom of the connection seat, a liquid discharge pipe is fixedly connected to the top of the connection seat, and a valve is installed inside the liquid discharge pipe; the liquid mass is input through the liquid inlet pipe and discharged through the liquid discharge pipe, and the opening and closing of the liquid discharge pipe are controlled by the valve.

[0008] Further, a magnetic sheet is embedded on one side of the surface of the end post facing the isolation cavity; the magnetic sheet structure can adsorb metal impurities inside the isolation cavity to prevent them from flowing with the liquid mass.

[0009] Further, a rubber ring is sleeved on the surface of the end post and the rubber ring is located at the connection between the end post and the end of the through pipe; the rubber ring structure can improve the sealing performance of the connection after the end post is closed.

[0010] Compared with the prior art, the utility model has the following beneficial effects: when the pump body operates, the liquid mass is inhaled through the liquid inlet pipe and discharged through the liquid discharge pipe. A through pipe structure is provided at the end of the connection seat, and a check valve A and a check valve B with opposite flow directions are provided inside the fixing ring. When the diaphragm makes an extrusion action, part of the liquid mass inside the connection seat is discharged along the liquid discharge pipe, and the other part of the liquid mass enters the isolation cavity through the check valve A. When the diaphragm makes an adsorption action, the liquid mass is inhaled into the connection seat, and at the same time, part of the liquid mass inside the isolation cavity is filtered through the filter screen and then inhaled into the connection seat. Through the design of the isolation cavity structure, the flow space can be increased during the liquid mass circulation process, and the liquid mass entering the isolation cavity can be filtered, and at the same time, impurities are prevented from accumulating inside the connection seat for a long time, which affects the flow rate of the pump body and the quality of the diaphragm. When cleaning is required, the valve inside the liquid discharge pipe can be closed, and the end post can be opened. At this time, when the pump body operates, the liquid mass can be discharged from the end of the through pipe and at the same time, the impurities inside the isolation cavity can be discharged, realizing the cleaning of the inside of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the overall structural schematic diagram of a hydraulic diaphragm metering pump of the present utility model.

[0012] Figure 2 is the internal structural schematic diagram of the connection seat and the through pipe of a hydraulic diaphragm metering pump of the present utility model.

[0013] Figure 3 is the structural schematic diagram of the end post of a hydraulic diaphragm metering pump of the present utility model.

[0014] In the figure: 1. Pump body; 2. Isolation mechanism; 201. Connection seat; 202. Liquid inlet pipe; 203. Liquid discharge pipe; 204. Valve; 205. Diaphragm; 206. Through pipe; 207. End post; 208. Isolation cavity; 209. Fixing ring; 210. Check valve A; 211. Check valve B; 212. Magnetic sheet; 213. Rubber ring; 214. Filter screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Such as Figures 1 - 3As shown in the figure, a hydraulic diaphragm metering pump includes a pump body 1 and also includes an isolation mechanism 2. The isolation mechanism 2 is provided at the end of the pump body 1. The isolation mechanism 2 includes a connection seat 201, a diaphragm 205, a through pipe 206, an end post 207, an isolation chamber 208, a fixing ring 209, a check valve A 210, and a check valve B 211. A connection seat 201 is provided on one side of the liquid discharge end of the pump body 1, and a diaphragm 205 located inside the connection seat 201 is installed at the operating end of the pump body 1. A through pipe 206 is fixedly connected to the surface of the connection seat 201 away from the pump body 1. An end post 207 is detachably connected to the end of the through pipe 206, and an isolation chamber 208 is provided inside the through pipe 206. A fixing ring 209 is fixedly connected to the inside of the through pipe 206 near the connection seat 201. A check valve A 210 and a check valve B 211 are respectively installed inside the fixing ring 209. A filter screen 214 is provided on the surface of the fixing ring 209 near the check valve B 211.

[0017] Among them, a liquid inlet pipe 202 is fixedly connected to the bottom of the connection seat 201, a liquid discharge pipe 203 is fixedly connected to the top of the connection seat 201, and a valve 204 is installed inside the liquid discharge pipe 203. A magnetic sheet 212 is embedded on the surface of the end post 207 facing the isolation chamber 208. The liquid medium is input through the liquid inlet pipe 202 and discharged through the liquid discharge pipe 203. The opening and closing of the liquid discharge pipe 203 are controlled by the valve 204. The magnetic sheet 212 structure can adsorb metal impurities located inside the isolation chamber 208 to prevent them from flowing with the liquid medium.

[0018] Among them, a rubber ring 213 is sleeved on the surface of the end post 207 and is located at the connection between the end post 207 and the end of the through pipe 206. The rubber ring 213 structure can improve the sealing performance of the connection after the end post 207 is closed.

[0019] It should be noted that the present utility model is a hydraulic diaphragm metering pump. During operation, when the pump body 1 runs, it sucks in the liquid medium through the liquid inlet pipe 202 and discharges it through the liquid discharge pipe 203. A through pipe 206 structure is provided at the end of the connecting seat 201. Inside the fixing ring 209, there are one-way valve A 210 and one-way valve B 211 structures with opposite flow directions. When the diaphragm 205 makes an extrusion action, part of the liquid medium inside the connecting seat 201 flows out along the liquid discharge pipe 203, and another part of the liquid medium enters the inside of the isolation chamber 208 from the one-way valve A 210. When the diaphragm 205 makes an adsorption action, it sucks the liquid medium into the inside of the connecting seat 201 and at the same time sucks part of the liquid medium inside the isolation chamber 208 into the inside of the connecting seat 201 after filtering through the filter screen 214. Through the structural design of the isolation chamber 208, it is possible to increase the flow space during the circulation of the liquid medium, filter the liquid medium entering the inside of the isolation chamber 208, and at the same time prevent impurities from accumulating in the connecting seat 201 for a long time and affecting the flow rate of the pump body 1 and the quality of the diaphragm 205. When cleaning is required, the valve 204 inside the liquid discharge pipe 203 can be closed, and the end post 207 can be opened. At this time, when the pump body 1 runs, the liquid medium can be discharged from the end of the through pipe 206 and at the same time the impurities inside the isolation chamber 208 can be discharged, realizing the cleaning of the inside of the pump body 1.

[0020] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic diaphragm metering pump, comprising a pump body (1), characterized in that: The pump body (1) further comprises an isolation mechanism (2), wherein the isolation mechanism (2) is arranged at the end of the pump body (1), and the isolation mechanism (2) comprises a connection seat (201), a diaphragm (205), a through pipe (206), an end column (207), an isolation chamber (208), a fixing ring (209), a one-way valve A (210) and a one-way valve B (211); a connection seat (201) is arranged on one side of the discharge end of the pump body (1), and a diaphragm (205) located inside the connection seat (201) is installed at the action end of the pump body (1); the connection seat (201) A through pipe (206) is fixedly connected to one end of the surface away from the pump body (1); an end column (207) is detachably connected to the end of the through pipe (206); an isolation chamber (208) is provided inside the through pipe (206); a fixing ring (209) is fixedly connected to one end of the through pipe (206) close to the connecting seat (201); a check valve A (210) and a check valve B (211) are respectively installed inside the fixing ring (209); and a filter screen (214) is provided on the surface of the fixing ring (209) close to the check valve B (211).

2. A hydraulic diaphragm metering pump according to claim 1, characterized in that: The bottom of the connection seat (201) is fixedly connected to a liquid inlet pipe (202), the top of the connection seat (201) is fixedly connected to a liquid discharge pipe (203), and a valve (204) is installed inside the liquid discharge pipe (203).

3. A hydraulic diaphragm metering pump according to claim 1, characterized in that: A magnetic sheet (212) is embedded and installed on the side of the surface of the end post (207) facing the isolation cavity (208).

4. A hydraulic diaphragm metering pump according to claim 1, characterized in that: A rubber ring (213) is sleeved on the surface of the end column (207), and the rubber ring (213) is located at the connection between the end column (207) and the end of the through pipe (206).

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