CN109882611A

CN109882611A - Manual Purge Valve for LC Pumps

Info

Publication number: CN109882611A
Application number: CN201910304505.XA
Authority: CN
Inventors: 付永恒; 付正建; 闾传明
Original assignee: Wuxi Se Na Instrument Equipment Manufacturing Co Ltd
Current assignee: Wuxi Se Na Instrument Equipment Manufacturing Co Ltd
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2019-06-14

Abstract

The invention discloses the Manual drain valves of liquid chromatography pump, including valve body, the valve body has valve chamber, knob is threaded on the valve body, the knob is equipped with sealed taper, the front end of the valve body is equipped with the bellmouth to match with the sealed taper, the bellmouth is connected with the valve chamber, the valve body is equipped with the first inlet opening being connected respectively with the valve chamber, second inlet opening and fluid hole, it is additionally provided with the corresponding drain hole for being connected to the bellmouth, the premixing filter disc for filtering liquid is equipped in the valve chamber, the rear end of the valve body is threaded with pressure sensor.The present invention can detect the pressure of valve intracavity liquid and only enter mixed common hydraulic purpose in valve chamber with a pressure sensor monitoring two-way liquid, effectively reduce cost.

Description

The Manual drain valve of liquid chromatography pump

Technical field

The present invention relates to the technical fields of exhaust-valve, and in particular to the Manual drain valve of liquid chromatography pump.

Background technique

The exhaust-valve of current high performance liquid chromatograph in the market is divided into manual knob and full-automatic two ways, compares Under Manual drain valve manufacturing cost it is lower, therefore most of high performance liquid chromatograph takes manual setting in the market.In liquid phase It has to realize quickly row using exhaust-valve when replacement mobile phase or flow-related road enter bubble in chromatograph use process The purpose of bubble or Rapid replacement mobile phase out, because larger flow rate pump, which can be used, in exhaust-valve opening carries out pump liquid.At present Only only one function is exactly to empty to Manual drain valve in the market.

The pressure sensor monarch of the pumping system of high performance liquid chromatograph configures a pressure using every pump currently on the market Sensor design, common customer will pay two pressures using gradient system (a kind of configurations of two pumps) i.e. liquid chromatograph producer The cost of force snesor, the two pumps flow path that has pressure is all logical when high performance liquid chromatograph works normally, theoretically one Pressure sensor.

Summary of the invention

In view of the deficiency of background technique, the technical problems to be solved by the invention provide a kind of manual row of liquid chromatography pump Empty valve, is not only able to achieve the purpose of the pressure of detection valve intracavity liquid, but also is able to achieve only with a pressure sensor monitoring two-way liquid Body enters mixed common hydraulic purpose in valve chamber.

In order to solve the above technical problems, the present invention provides the following technical scheme that

The Manual drain valve of liquid chromatography pump, including valve body, the valve body have valve chamber, are threaded on the valve body Knob, the knob are equipped with sealed taper, and the front end of the valve body is equipped with the bellmouth to match with the sealed taper, the cone Shape hole is connected with the valve chamber, and the valve body is equipped with the first inlet opening, the second feed liquor being connected respectively with the valve chamber Hole and fluid hole are additionally provided with the corresponding drain hole for being connected to the bellmouth, the premix for filtering liquid are equipped in the valve chamber Filter disc is closed, the rear end of the valve body is threaded with pressure sensor.

It is arranged with the first sealing ring on the knob and has the sealed taper in first sealing ring side tight fit, when When the knob is tightened on the valve body, first sealing ring and the valve body are interference fitted.

First inlet opening connects the first inlet tube, and second inlet opening connects the second inlet tube.

Egress filtering piece is installed, the fluid hole connects outlet tube on the fluid hole.

The drain hole connects waste pipe.

The front end of the pressure sensor is equipped with columned convex block, and being fitted close on the convex block has the second sealing ring, When the pressure sensor is tightened on the valve body screw thread, the tight periphery wall of second sealing ring fits closely the valve The inner wall of the open rearward end of chamber.

The pressure sensitive face of the pressure sensor is placed in the valve chamber.

The respective line energy with the center of the valve body of first inlet opening, second inlet opening, the fluid hole Form Y-shaped.

Compared with the prior art, the invention has the beneficial effects that: it can by this mechanism with pressure sensor Realize detection valve intracavity liquid pressure purpose, by valve chamber, the first inlet opening, the second inlet opening, fluid hole, drain hole, The structure of bellmouth and knob realizes the pressure that liquid in valve just can be only detected with a pressure sensor, makes to connect with the invention Two liquid chromatography pumps connect work as usual, overcome every liquid chromatography pump in the prior art and need a pressure sensor Use cost is effectively reduced in technological deficiency.

Detailed description of the invention

The present invention has following attached drawing:

Fig. 1 is perspective view of the explosion of the invention.

Specific embodiment

As shown, the Manual drain valve of this liquid chromatography pump, including valve body 1, valve body 1 has a valve chamber, before valve body 1 End is threaded with knob 4, and one end of knob 4 is equipped with shrinkage pool, is fixedly connected with a sealed taper 5 in shrinkage pool, the front end of valve body 1 is equipped with The bellmouth to match with sealed taper 5 seals taper to play when the peripheral wall of sealed taper 5 can be bonded the peripheral wall of bellmouth completely The effect in hole, bellmouth are connected with valve chamber, and valve body 1 is equipped with the first inlet opening 14 being connected respectively with the valve chamber, the Two inlet openings and fluid hole 15, the first inlet opening 14 and the second inlet opening pass through first entrance screw 12, second entrance screw 11 It is respectively communicated with the first inlet tube and the second inlet tube, to realize the effect of two-way feed liquor, corresponding connection taper is additionally provided on valve body 1 The drain hole 16 in hole, the effect of drain hole 16 is that the waste liquid in valve chamber is discharged, when bellmouth is blocked completely by sealed taper 5, The import that drain hole 16 is connected to bellmouth is also plugged, and can not be communicated with valve chamber；Between being retained between bellmouth and sealed taper 5 When gap, drain hole 16 is connected to bellmouth, and is communicated indirectly with valve chamber.In order to be filtered to the two-way liquid come in, and make The liquid of outflow is cleaner, is equipped with the premixing filter disc 10 for filtering liquid, in valve chamber in order to monitor the liquid in valve chamber The pressure of body is threaded with pressure sensor 2 in the rear end of valve body 1.In the present embodiment, the feeling of stress of pressure sensor 2 Face is answered to be placed in valve chamber, with more accurately induction pressure.

In the present embodiment, liquid is not flowed out to 4 direction of knob when device empties in order to prevent, is reached good sealing and is made With being arranged with the first sealing ring 6 on knob 4, which is low pressure seal circle, and sealed taper 5 is installed tightly to knob The side of the first sealing ring 6 on 4, when the knob 4 is tightened on valve body 1, the first sealing ring 6 is interference fitted with valve body 1.

In the present embodiment, the egress filtering piece 8 for filtering liquid again is installed, specifically, going out on fluid hole 15 Filter disc 8 of making a slip of the tongue is mounted on filter disc cuff 9, and filter disc cuff 9 is mounted on fluid hole 15；Fluid hole 15 is connected by outlet screw 7 Pick out liquid pipe.

In the present embodiment, drain hole 16 connects waste pipe by emptying screw 13.

In the present embodiment, in order to be equipped with columned convex block 21 in the front end of pressure sensor 2, closely match on convex block 21 Conjunction has the second sealing ring 3, and when pressure sensor 2 is tightened on valve body 1, the tight periphery wall of the second sealing ring 3 fits closely valve The inner wall of the open rearward end of chamber when this structure can make pressure sensor 2 be connected on valve body 1, can seal up valve chamber Open rearward end prevents liquid from oozing out, and the pressure for guaranteeing that pressure sensor 2 monitors is accurate.

In the present embodiment, the respective line with the center of valve body 1 of the first inlet opening 14, the second inlet opening, fluid hole 15 Y-shaped can be formed.This structural modeling is beautiful, and can understand and simply identify the first inlet opening 14, the second inlet opening and go out Fluid apertures 15.

Before exhaust-valve carries out emptying work, screws knob 4 and the sealed taper 5 on knob 4 is made to seal the cone on valve body 1 The import of drain hole 16 has also been blocked in shape hole, at this moment, sealed taper 5, meanwhile, pressure sensor 2 is also tightened on valve body 1, In this case, the first inlet opening 14, the second inlet opening, fluid hole 15 are communicated with valve chamber, and the feeling of stress of pressure sensor 2 Answer face towards valve chamber and be capable of the pressure of directly Inductance valve intracavitary liquid, then, two-way liquid pass through respectively the first inlet tube, Second inlet tube enters in the first inlet opening 14 and the second inlet opening, then all enters in valve chamber and is mixed, mixed Liquid carries out primary filtration through premixing filter disc 10, then flows out from fluid hole 15 after the filtering of egress filtering piece 8 again, In whole process, the pressure sensitive face of pressure sensor 2 is always monitored the fluid pressure in valve chamber.

When exhaust-valve carries out emptying work, unscrews knob 4 and make between being formed between sealed taper 5 and bellmouth thereon Gap, and also to form gap between bellmouth and drain hole 16, in this case, drain hole 16, the first inlet opening 14, Two inlet openings, fluid hole 15 are communicated with valve chamber, and the pressure sensitive face of pressure sensor 2 can incude towards valve chamber and directly The pressure of liquid in valve chamber, at this point, working as, two-way liquid passes through the first inlet opening 14 respectively and the second inlet opening enters in valve chamber Afterwards, since fluid hole 15 is connected to the component that sampling valve, chromatographic column etc. have certain back-pressure, and drain hole 16 connections one are without anti- The waste pipe of pressure realizes the work of emptying at this point, liquid passes through in 16 runner waste pipe of drain hole from the higher valve chamber of pressure With in the whole process, the pressure sensitive face of pressure sensor 2 is always monitored the fluid pressure in valve chamber.

To sum up, the purpose that can be realized the pressure of detection valve intracavity liquid by this mechanism with pressure sensor 2, leads to Valve chamber, the first inlet opening 14, the second inlet opening, fluid hole 15, drain hole 16, the structure of bellmouth and knob 4 are crossed, realizes and only uses One pressure sensor 2 just can detect the pressure of liquid in valve, and connect with the invention two liquid chromatography pumps is made to work as usual, The technological deficiency that every liquid chromatography pump in the prior art needs a pressure sensor 2 is overcome, use cost is effectively reduced.

Claims

1. The manual emptying valve of the liquid chromatography pump comprises a valve body, the valve body has a valve cavity, and it is characterized in that: a knob is threaded on the valve body, and a sealing cone is arranged on the knob, and the valve body is provided with a sealing cone. The front end of the body is provided with a conical hole matched with the sealing cone, the conical hole is communicated with the valve cavity, and the valve body is provided with first liquid inlets respectively communicated with the valve cavity hole, the second liquid inlet hole and the liquid outlet hole, and there are also emptying holes corresponding to the conical holes. The threaded connection has a pressure sensor.

2 . The manual emptying valve of a liquid chromatography pump according to claim 1 , wherein a first sealing ring is sleeved on the knob, and the sealing ring is tightly fitted on one side of the first sealing ring. 3 . When the knob is screwed on the valve body, the first sealing ring is in an interference fit with the valve body.

3 . The manual emptying valve of a liquid chromatography pump according to claim 1 , wherein the first liquid inlet hole is connected to the first liquid inlet pipe, and the second liquid inlet hole is connected to the second liquid inlet pipe. 4 . .

4 . The manual emptying valve of a liquid chromatography pump according to claim 1 , wherein an outlet filter is installed on the liquid outlet hole, and the liquid outlet hole is connected with a liquid outlet pipe. 5 .

5 . The manual emptying valve of a liquid chromatography pump according to claim 1 , wherein the emptying hole is connected to a waste pipe. 6 .

6 . The manual emptying valve of a liquid chromatography pump according to claim 1 , wherein the front end of the pressure sensor is provided with a cylindrical bump, and the bump is tightly fitted with a second sealing ring, 7 . When the pressure sensor is screwed on the valve body, the tight outer peripheral wall of the second sealing ring closely fits the inner wall of the rear end opening of the valve cavity.

7 . The manual emptying valve of a liquid chromatography pump according to claim 1 , wherein the pressure sensing surface of the pressure sensor is placed in the valve cavity. 8 .

8 . The manual emptying valve of a liquid chromatography pump according to claim 1 , wherein the first liquid inlet hole, the second liquid inlet hole and the liquid outlet hole are respectively connected with the valve body. 9 . The connection of the center can form a Y shape.