CN101865126B

CN101865126B - Low flow pump head

Info

Publication number: CN101865126B
Application number: CN201010211455XA
Authority: CN
Inventors: 罗献尧
Original assignee: 罗献尧
Current assignee: ZHEJIANG AILIPU TECHNOLOGY CO., LTD.
Priority date: 2010-06-25
Filing date: 2010-06-25
Publication date: 2012-03-21
Anticipated expiration: 2030-06-25
Also published as: CN101865126A

Abstract

The invention relates to a metering pump, in particular to a low flow pump head. The low flow pump head is characterized in that: a sampling valve is arranged on one lateral surface of a pump head body, one end of a valve rod of the sampling valve is sleeved with an O-shaped sealing ring e and an O-shaped sealing ring d, the other end of the valve rod passes through a locking nut and then is connected with a sampling valve handle, and the locking nut is screwed with the pump head body; and the lateral surface of the valve rod positioned between the O-shaped sealing ring e and the O-shaped sealing ring d is provided with a pore, the pore is an inlet of the valve rod, and one end connected with the sampling valve handle is an outlet of the valve rod. The low flow pump head can conveniently and directly sample from the sampling valve of the pump head body, can conveniently discharge air from the sampling valve so as to avoid medicament reject caused by reaction of liquid and air or inaccurate adding amount, and is particularly suitable for adding low-pressure and low-flow medicinal liquid in the industries of medicament, chemical engineering, food, water treatment and the like.

Description

A kind of small flow pump head

Technical field

The present invention relates to a kind of metering pump, be specially a kind of small flow pump head.

Background technique

In industries such as medicine, chemical industry, food, water treatments, liquid mixes with liquid by a certain percentage or liquid quantitative add with technologies such as solid chemicals mixes in, be provided with below the most requirement:

1, in order to detect medicine liquid ingredient or the quality that adds in the pipeline,, sampling cock must be set in place so that can in time take measures to deal with problems;

2, there is a large amount of air in metering pump owing in the pipeline when just starting; Can cause charging quantity inaccurate; Even the small flow pump head just gone out not liquid, and long-time the contact with air of some soup understood the generation chemical reaction simultaneously, and so general consideration is provided with outlet valve in pipeline; So that, air is drained from outlet valve through the liquid compression air.

Because the setting of numerous valves and bypass makes the pipeline installation and maintenance bring very big inconvenience in the pipeline, cost is also very high simultaneously, also brings very big inconvenience for once more operator's regular job.In sum, market presses for aly both can satisfy above-mentioned functions, again can be easy to operate, and the also lower device of price simultaneously.

Summary of the invention

To the problem that exists in the existing technology, the object of the present invention is to provide a kind of technological scheme of small flow pump head.

Described a kind of small flow pump head; Comprise pump head body, inlet valve and outlet valve; It is characterized in that also being provided with sampling cock on pump head body one side; Said sampling cock valve rod one end socket is provided with O RunddichtringO e and O RunddichtringO d, and the valve rod the other end links to each other with the sampling cock handle after passing locking nut, and locking nut and pump head body are spirally connected; Valve rod side between O RunddichtringO e and O RunddichtringO d is provided with an aperture, and this aperture is the import of valve rod, and an end that connects the sampling cock handle is the outlet of valve rod.

Described a kind of small flow pump head is characterized in that the outlet end of described valve rod links to each other with the sampling flexible pipe.

Described a kind of small flow pump head is characterized in that described O RunddichtringO e contacts with the pump head body longitudinal surface with valve rod, and O RunddichtringO d contacts with the pump head body landscape surface with valve rod.

Described a kind of small flow pump head; It is characterized in that described inlet valve and outlet valve respectively by the pipe pressure cap, on press pipe box, press down pipe box, O RunddichtringO a, valve body, valve pocket, valve ball, O RunddichtringO b, valve seat and O RunddichtringO c form; The valve pocket of inlet valve is a valve pocket one; The valve pocket of outlet valve is a valve pocket two, and valve pocket two is longer than valve pocket one, and the arranged outside in valve pocket two bottoms has a circle groove; In groove, be provided with at least one through hole, the position of groove is corresponding with the position of sampling cock passage.

Described a kind of small flow pump head; Valve body one end that it is characterized in that described inlet valve is spirally connected through valve pocket one, valve ball, valve seat, O RunddichtringO b and O RunddichtringO c and pump head body lower end; The valve body the other end through O RunddichtringO a, on press pipe box, press down pipe box and be spirally connected with the pipe pressure cap, wherein go up to press pipe box, press down pipe box and pipe pressure cap through being connected flexible pipe with impacting force chucking import that valve body is spirally connected.

Described a kind of small flow pump head; Valve body one end that it is characterized in that described outlet valve is spirally connected through valve pocket two, valve ball, valve seat, O RunddichtringO b and O RunddichtringO c and pump head body lower end; The valve body the other end through O RunddichtringO a, on press pipe box, press down pipe box and be spirally connected with the pipe pressure cap, wherein go up to press pipe box, press down pipe box and pipe pressure cap through being connected flexible pipe with impacting force chucking outlet that valve body is spirally connected.

Above-mentioned a kind of small flow pump head; Both direct samples from the pump head body sampling cock easily, discharged air from sampling cock easily again, thus avoid liquid-to-air to react or the inaccurate medicine that causes of charging quantity is scrapped; The soup that is particluarly suitable for industry mesolows such as medicine, chemical industry, food, water treatment, small flow adds; The liquid that has not only satisfied the user adds the pipeline required function, can alleviate the difficulty that pipeline is installed and keeped in repair again greatly, and is simple to operation; Low price, handsome in appearance.

Description of drawings

Fig. 1 is an axial sectional view of the present invention;

Fig. 2 is a radial cross-section of the present invention;

Fig. 3 is the structural representation of valve pocket two of the present invention;

Fig. 4 is the structural representation of valve rod of the present invention;

Fig. 5 is a general assembly drawing of the present invention.

Embodiment

Below in conjunction with Figure of description the present invention is further specified:

As shown in the figure; A kind of small flow pump head comprises pump head body 11, inlet valve and outlet valve, and pump head body also is provided with sampling cock on 11 1 sides; Said sampling cock valve rod 14 1 end sockets are provided with O RunddichtringO e17 and O RunddichtringO d16; Valve rod 14 the other ends pass locking nut 15 back and link to each other with sampling cock handle 13, and locking nut 15 is spirally connected with pump head body 11, and locking nut 15 and the pump head body 11 sides pretightening force that is spirally connected makes O RunddichtringO e17 and O RunddichtringO d16 produce distortion to produce and seal; Valve rod 14 sides between O RunddichtringO e17 and O RunddichtringO d16 are provided with an aperture 21; This aperture 21 is the import of valve rod 14; An end that connects sampling cock handle 13 is the outlet of valve rod 14; The outlet end of valve rod 14 links to each other with the sampling flexible pipe, and the entrance point of valve rod 14 is corresponding with the through hole 23 on valve pocket 26 lower recess 22.

Described O RunddichtringO e17 contacts with pump head body 11 longitudinal surfaces with valve rod 14; O RunddichtringO d16 contacts with pump head body 11 landscape surfaces with valve rod 14, when needs sampling or venting, unscrews locking nut 15; Because O RunddichtringO e17 contacts with pump head body 11 longitudinal surfaces with valve rod 14; Unscrew locking nut 15 back O RunddichtringO e17 and separate with pump head body 11 longitudinal surfaces with valve rod 14, liquid or gas will get into the aperture 21 on the valve rod 14 from parting surface, again because O RunddichtringO d16 contacts with pump head body 11 landscape surfaces with valve rod 14; In turn locking nut 15; O RunddichtringO d16 and valve rod 14 and pump head body 11 landscape surfaces still excellent sealing, so liquid or gas just can only be discharged from valve rod 14 the other ends from the 21 entering valve rods of the aperture on the

valve rod

14,14 inside.

Described inlet valve and outlet valve respectively by pipe pressure cap 1, on press pipe box 2, press down pipe box 3, O RunddichtringO a4, valve body 5, valve pocket, valve ball 7, O RunddichtringO b8, valve seat 9 and O RunddichtringO c10 form; The valve pocket of inlet valve is a valve pocket 1; The valve pocket of outlet valve is a valve pocket 26, and valve pocket 26 is longer than valve pocket 1, and the arranged outside in valve pocket 26 bottoms has a circle groove 22; In groove 22, be provided with at least one through hole 23, the position of groove 22 is corresponding with the position of sampling cock passage.

Valve body 5 one ends of described inlet valve are spirally connected through valve pocket 1, valve ball 7, valve seat 9, O RunddichtringO b8 and O RunddichtringO c10 and pump head body 11 lower ends; Valve body 5 the other ends through O RunddichtringO a4, on press pipe box 2, press down pipe box 3 and be spirally connected with pipe pressure cap 1, wherein go up and press pipe box 2, press down pipe box 3 and pipe pressure cap 1 through being connected flexible pipe with impacting force chucking import that valve body 5 is spirally connected.Valve ball 7 and valve body 5 are set in valve pocket one 12 chambeies, and the external diameter of valve seat 9 and valve pocket one 12 chamber close-fittings, valve body 5 cover by deadweight on the endoporus of valve body 5 settings, flow backwards valve pocket one 12 external diameters and valve body 5 inner chamber Spielpassung to prevent soup.

Valve body 5 one ends of described outlet valve are spirally connected through valve pocket 26, valve ball 7, valve seat 9, O RunddichtringO b8 and O RunddichtringO c10 and pump head body 11 lower ends; Valve body 5 the other ends through O RunddichtringO a4, on press pipe box 2, press down pipe box 3 and be spirally connected with pipe pressure cap 1, wherein go up and press pipe box 2, press down pipe box 3 and pipe pressure cap 1 through being connected flexible pipe with impacting force chucking outlet that valve body 5 is spirally connected.Valve ball 7 and valve body 5 are set in valve pocket 26 chambeies, and the external diameter of valve seat 9 and valve pocket 26 chamber close-fittings, valve body 5 cover by deadweight on the endoporus of valve body 5 settings, flow backwards valve pocket 26 external diameters and valve body 5 inner chamber Spielpassung to prevent soup.

The complete machine of metering pump is made up of driving end, fluid end two parts usually; Through 4 bolts pass pump head body 11, pump head connecting base 20 is connected with drive end 18; In pump head body 11 cavitys, diaphragm 19 is set, the push rod that diaphragm 19 the other ends and drive end 18 are provided with is spirally connected.

Working principle of the present invention is following:

1. metering pump proper functioning: when drive end when move in the left side, diaphragm 19 is done around Qu Yundong (being suction stroke), the pump head cylinder interior pressure reduces; When the pressure in the pump head was lower than the imbibition loine pressure, the unidirectional valve ball of suction port was made progress " pushing open ", and the medium in the inlet ductwork gets in the pump head chamber; When induction stroke finishes; Pressure in diaphragm 19 instantaneous the stopping, pump head is identical with the pressure in the inlet ductwork, and the unidirectional valve ball of suction port leans on from repeats bits.When discharge stroke, when drive end moved to the right, the pressure in the pump head raise at once; When pressure was higher than export pipeline pressure, the unidirectional valve ball of exhaust port was made progress " pushing open ", and the medium in the pump head gets into the fluid pipeline; When discharge stroke finishes, plunger again moment stop, the interior pressure of the pressure in the pump head and export pipeline is identical; Export unidirectional valve ball and lean on from repeats bits, and then the next circulation of beginning.

2. when existing gas to exit in the pump head chamber: be rotated counterclockwise locking nut 15 several angles; Air gets into sampling line through the aperture 21 that is provided with on the valve rod 14 like this; Till the sampling line outlet does not have bubble, tighten locking nut 15 then clockwise and close the sampling cock outlet.

3. when needs are taken a sample: be rotated counterclockwise locking nut 15 several angles, liquid gets into sampling line through the aperture 21 that is provided with on the valve rod 14 like this, till sample satisfies user's needs, tightens locking nut 15 then clockwise and closes the sampling cock outlet.

Claims

1. small flow pump head; Comprise pump head body (11), inlet valve and outlet valve; It is characterized in that also being provided with sampling cock on pump head body (11) one sides; Said sampling cock valve rod (14) one end sockets are provided with O RunddichtringO e (17) and O RunddichtringO d (16), and valve rod (14) the other end passes locking nut (15) back and links to each other with sampling cock handle (13), and locking nut (15) is spirally connected with pump head body (11); Valve rod (14) side that is positioned between O RunddichtringO e (17) and the O RunddichtringO d (16) is provided with an aperture (21), and this aperture (21) is the import of valve rod (14), and an end that connects sampling cock handle (13) is the outlet of valve rod (14); Described inlet valve and outlet valve respectively by pipe pressure cap (1), on press pipe box (2), press down pipe box (3), O RunddichtringO a (4), valve body (5), valve pocket, valve ball (7), O RunddichtringO b (8), valve seat (9) and O RunddichtringO c (10) form; The valve pocket of inlet valve is a valve pocket one (12); The valve pocket of outlet valve is a valve pocket two (6); Valve pocket two (6) is longer than valve pocket one (12); And the arranged outside in valve pocket two (6) bottoms has a circle groove (22), in groove (22), is provided with at least one through hole (23), and the position of groove (22) is corresponding with the position of sampling cock passage.

2. a kind of small flow pump head according to claim 1 is characterized in that the outlet end of described valve rod (14) links to each other with the sampling flexible pipe.

3. a kind of small flow pump head according to claim 1 is characterized in that described O RunddichtringO e (17) contacts with pump head body (11) longitudinal surface with valve rod (14), and O RunddichtringO d (16) contacts with pump head body (11) landscape surface with valve rod (14).

4. a kind of small flow pump head according to claim 1; Valve body (5) one ends that it is characterized in that described inlet valve are spirally connected with pump head body (11) lower end through valve pocket one (12), valve ball (7), valve seat (9), O RunddichtringO b (8) and O RunddichtringO c (10); Valve body (5) the other end through O RunddichtringO a (4), on press pipe box (2), press down pipe box (3) and be spirally connected with pipe pressure cap (1), wherein go up to press pipe box (2), press down pipe box (3) and pipe pressure cap (1) through being connected flexible pipe with impacting force chucking import that valve body (5) is spirally connected.

5. a kind of small flow pump head according to claim 1; Valve body (5) one ends that it is characterized in that described outlet valve are spirally connected with pump head body (11) lower end through valve pocket two (6), valve ball (7), valve seat (9), O RunddichtringO b (8) and O RunddichtringO c (10); Valve body (5) the other end through O RunddichtringO a (4), on press pipe box (2), press down pipe box (3) and be spirally connected with pipe pressure cap (1), wherein go up to press pipe box (2), press down pipe box (3) and pipe pressure cap (1) through being connected flexible pipe with impacting force chucking outlet that valve body (5) is spirally connected.