CN209729812U

CN209729812U - Improved fluid pump flow switch

Info

Publication number: CN209729812U
Application number: CN201920799902.4U
Authority: CN
Inventors: 陈荣国; 颜正辉; 陈志平; 陈海林
Original assignee: Hangzhou Xinkong Electronic Technology Co Ltd
Current assignee: Hangzhou Xinkong Electronic Technology Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2019-12-03
Anticipated expiration: 2029-05-30

Abstract

The utility model relates to a kind of improved fluid pump flow switch, including valve casing and spool, valve casing includes shell and capping, and capping is detachable on shell, so that capping forms chamber resettling with shell；The extension for extending towards chamber resettling direction and entering in chamber resettling is formed in capping, being equipped in extension can be with magnet cooperation to control tongue tube whether electric motor starting；Spool is axially displaceably located in chamber resettling, and spool has hollow cavity, and the magnet of cooperation tongue tube is provided in hollow cavity；The outer sheath of spool is equipped with spring, and spring is located in chamber resettling；When spool is moved axially because being acted on by the fluid forces in the cavity for entering shell, magnet can axially move with spool, and when magnet does not incude tongue tube, tongue tube no longer controls motor work；When the flow of fluid reduces, entire spool can move under the rebound effect of spring, and magnet incudes tongue tube, and tongue tube control motor is in starting state always.

Description

Improved fluid pump flow switch

Technical field

The utility model relates to fluid pump field more particularly to a kind of improved fluid pump flow switches, this is improved Fluid pump flow switch is particularly suitable in water pump.

Background technique

Fluid pump is a kind of device that fluid is transported by the rotation of motor, and automatic fluid pump then refers to fluid by automatic The fluid pump of control.

To realize the automatic control to fluid pump, it will usually flow switch is installed at the fluid outlet passage of the pump housing, and At the fluid feed channel of the pump housing install check-valves, by flow switch together with check-valves interoperation, play opening or Person closes the effect of the water inlet end of the pump housing.

Pressure switch be it is hydraulic for detecting the fluid in fluid outlet passage, hydraulic in fluid outlet passage is higher than When setting value, the motor power of fluid pump, motor stalls are cut off；It is hydraulic lower than setting value in fluid outlet passage When, connect the power supply of fluid pump motor, electric motor starting rotation.Such as under the small traffic conditions of fluid, once there is fluid outflow, pump Starting, but because the discharge of fluid is smaller, manifold pressure moment can be made to become larger, motor is shut down at once；With the stream of small flow Body continues to flow out, and makes pump startup, and so circulation causes the frequent starting pumped, can damage to motor.

Existing fluid pump still has some shortcomings: due to needing to install flow switch in the pump housing of fluid pump And check-valves, using the interoperation of the two, to complete the control to fluid pump, and it is very limited to pump intracorporal space, so Installation flow switch and check-valves will undoubtedly increase the structure complexity of fluid pump, the manufacture difficulty of larger fluid pump and manufacture at This.

Utility model content

Technical problem to be solved in the utility model is that a kind of improved fluid pump use is provided for the above-mentioned prior art Flow switch.The fluid pump not only facilitates user to be mounted directly in existing fluid pump with flow switch, but also utilizes The fluid pump flow switch can complete the effect that control turns on or off the water outlet of the pump housing.

Technical solution adopted by the utility model to solve the above technical problems is as follows: improved fluid pump flow switch, Including valve casing and spool, which is characterized in that the valve casing includes:

Shell, the shell have the cavity of both ends open, have the apopore of connection cavity on the side wall of shell；

Capping, the capping is detachable on shell, so that capping forms chamber resettling with shell；It is formed in the capping Have and extend and enter the indoor extension of accommodating cavity towards the chamber resettling direction, the extension is provided with can be with magnet Cooperation to control tongue tube whether electric motor starting；

The spool is axially displaceably located in the chamber resettling, and the spool has hollow cavity, hollow cavity Inside it is provided with the magnet of cooperation tongue tube；The outer sheath of the spool is equipped with spring, and spring is located in chamber resettling；Wherein, in institute State spool because by enter moved axially due to the indoor fluid forces of accommodating cavity act on when, the spring with it is compressed become Gesture.

With improvement, in the fluid pump flow switch, the magnet ring is located in the hollow cavity of spool.

It improves again, there is the axial direction along cavity in the fluid pump flow switch, on the inner sidewall of the shell The guide groove that direction is formed, the spool have and can make the guide pad moved along guide groove formation direction in guide groove.

With improvement, in the fluid pump flow switch, L-shaped card slot is formed on the peripheral wall of the shell, it should Card slot has the vertical section and horizontal segment of linking, and having in the capping can enter from the vertical section of the card slot and snap onto water The card column of flat section.

The capping is detachable on shell by snap.

It is further improved, there is connection hollow cavity in the fluid pump flow switch, on the side wall of the spool Inlet opening, formed water space between the hollow cavity of the spool and the extension of the capping.

With improvement, it is formed with accommodation groove in the capping, the control panel of connection tongue tube is provided in the accommodation groove.

Further, the capping is fastened with the fastening cap for closing the accommodation groove, which is located at the outside of shell.

Improve again, in the fluid pump flow switch, the spool include pedestal and by pedestal along hollow cavity Axial direction extend made of guide part, hollow cavity perforation pedestal and guide part.

With improvement, in the fluid pump flow switch, sealing ring is provided between the capping and shell；Or/ Have the sidewall direction along shell around the washer of setting with the lower end of, the shell.

Compared with the prior art, the advantages of the utility model are:

Firstly, the fluid pump flow switch in the utility model includes valve casing and spool, valve casing includes shell and capping, Cover it is detachable on shell so that capping with shell formed chamber resettling；It is formed in capping towards chamber resettling direction Extend and enter the indoor extension of accommodating cavity, extension be provided with can cooperate with magnet to control electric motor starting with No tongue tube；Spool is axially displaceably located in the chamber resettling of valve casing, and spool has hollow cavity, sets in hollow cavity It is equipped with the magnet of cooperation tongue tube；The outer sheath of spool is equipped with spring, and spring is located in chamber resettling；In spool because being entered When fluid forces in the cavity of shell are acted on and moved axially, magnet can axially move with spool, and spring is slow Slow compressive deformation, when magnet does not incude tongue tube, tongue tube no longer controls motor work, the fluid flowed at this time through the pump housing Amount will continue to increase；When the flow of fluid reduces, entire spool can move under the rebound effect of spring, and it is extensive that elongation occurs for spring Multiple deformation, magnet at this time incude tongue tube, and tongue tube control motor is in starting state always；

Secondly, the fluid pump is not needed with flow switch by check-valves, it is only necessary to pass through tongue tube and mobile magnet Between starting of the cooperation to control motor whether, so that it may realization accurately controls fluid flow in the pump housing；

Again, it was formed between water between the hollow cavity of spool and the extension of capping of fluid pump flow switch Gap can use this and cross water space and a part of filtering foreign adulterated in fluid is fallen, and then ensures fluid pump and the fluid The normal work of pump discharge switch；

Finally, components used by the fluid pump flow switch are few, structure is simple, at low cost and high reliablity, it is non- Often conveniently it is installed on the pump housing of fluid pump.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of fluid pump flow switch in the utility model embodiment；

Fig. 2 is the bottom substance schematic diagram of fluid pump flow switch shown in Fig. 1；

Fig. 3 is the cross-sectional view of fluid pump flow switch shown in Fig. 1；

Fig. 4 is the structural schematic diagram of shell in the utility model embodiment；

Fig. 5 is schematic diagram of the shell at another visual angle shown in Fig. 4；

Fig. 6 is the structural schematic diagram covered in the utility model embodiment；

Fig. 7 is the structural schematic diagram of spool in the utility model embodiment；

Fig. 8 is when the spool in fluid pump flow switch shown in Fig. 1 is moved axially because of fluid forces effect Cross-sectional view.

Specific embodiment

The utility model is described in further detail below in conjunction with figure embodiment.

As shown in FIG. 1 to FIG. 7, improved fluid pump flow switch in the present embodiment, including valve casing and spool, valve casing packet It includes:

Shell 1, the shell 1 have the cavity 10 of both ends open, have the apopore of connection cavity 10 on the side wall of shell 1 11；The quantity of apopore 11 can according to need be provided with it is multiple, in time the fluid in the cavity 10 for entering shell Discharge；

Capping 2, the capping 2 is detachable on shell 1, so that capping 2 forms chamber resettling 20 with shell 1；In capping 2 It is formed with the extension 21 for extending towards 20 direction of the chamber resettling and entering in chamber resettling 20, extension 21 is provided with energy It is enough cooperate with magnet to control the tongue tube 3 whether electric motor starting；

Spool 4 is axially displaceably located in the chamber resettling 20 that capping 2 is formed with shell 1, and spool 4 has hollow cavity Body 40 is provided with the magnet 5 of cooperation tongue tube 3 in hollow cavity 40；The outer sheath of the spool 4 is equipped with spring 6, and spring 6 is located at Capping 2 is formed by chamber resettling 20 with shell 1；Wherein, in spool 4 because by the fluid forces entered in chamber resettling 20 When acting on and moving axially, which has compressed trend.

Specific to the present embodiment, which can be located in the hollow cavity 40 of spool 4, with this ensure magnet 5 with Fiting effect between tongue tube 3.For example, the annular groove for being formed on the side wall of hollow cavity 40 and placing the magnet 5 can be enabled (not shown), steadily to place magnet 5 using annular groove；The depth of the annular groove is most to be placed in tune with magnet 5 It is excellent, even if to ensure to be put into magnet 5 in annular groove, the side wall of hollow cavity 40 be still smoothly, without protrusion, from And it ensure that the extension 21 of capping 2 will not be scraped with 40 side wall of hollow cavity of the spool 4 of axial movement, it is ensured that spool 4 smoothness when moving axially, accuracy when improving for fluid detection.

When spool 4 is moved axially because being acted on by the fluid forces entered in cavity 10, in order to ensure spool Directional stability when axially moving, referring to shown in Fig. 5 and Fig. 7, it is also possible that having on the inner sidewall of shell 1 along appearance The guide groove 12 that the axial direction of chamber 10 is formed, spool 4 have and can move in guide groove 12 along guide groove formation direction Dynamic guide pad 41.

It is, of course, also possible to form accommodation groove 22 in capping 2, the control of connection tongue tube 3 is provided in the accommodation groove 22 Plate 7.In order to ensure the safety and stable placement effect of control panel, capping 2 can be enabled to be fastened with for closing accommodation groove 22 Fastening cap 8, the fastening cap 8 are located at the outside of shell 1.

Shown in Figure 1 for the unloading set-up mode between capping and shell, capping 2 can by snap Unloading is on shell 1.For example, with reference to shown in Fig. 4 and Fig. 6, L-shaped card slot is formed on the peripheral wall of shell 1, which has The vertical section 13 and horizontal segment 14 of linking, covering on 2 to have can enter from the vertical section 13 of the card slot and snap onto horizontal segment 14 card column 23.In the present embodiment, such card slot accordingly has in capping 2 there are two relatively being formed on shell 1 Two card columns 23 being respectively clamped into the correspondence card slot of shell 1.

It is shown in Figure 3 as the another way for stablizing placement tongue tube, one can also be formed in extension 21 solely Vertical chamber 24, is then placed on tongue tube 3 in the separate chamber 24.

After in the fluid pump that the fluid pump flow switch of the present embodiment is installed to real work, the stream through pump housing sucking For body usually with a large amount of sundries, e.g. weeds or sludge etc., these sundries certainly will influence the fluid pump flow switch Normal work.Therefore, shown in referring to figs. 7 and 8, the present embodiment takes following ameliorative measure, so that on the side wall of spool 4 Inlet opening 42 with connection hollow cavity 40 was formed between water between the hollow cavity 40 of spool 4 and the extension 21 for covering 2 Gap 43.As the flow of the fluid entered in hollow cavity 40 through inlet opening 42 increases, water space is crossed by this of formation 43 can fall a part of filtering foreign that fluid adulterates, and then ensure the normal of fluid pump and the fluid pump flow switch Work.

As a kind of structure setting mode of spool 4, the spool 4 in the embodiment may include pedestal 44 and by pedestal Guide part 45 made of the 44 axial direction extension along hollow cavity 40, hollow cavity 40 penetrate through pedestal 44 and guide part 45.Example Such as, as needed, the guide pad 41 of spool can be formed on the pedestal 44 of spool.Spring 6, which can choose, is set in the guiding The outside in portion 45, and resist by pedestal 44 end of spring 6.

In addition, sealing ring 91 can be set between capping 2 and shell 1, to ensure to cover sealing when fastening with shell Effect.Certainly, shown in Figure 3, it also can according to need and enable the lower end of shell 1 that there is the sidewall direction along shell around setting Washer 92.

Working principle about fluid pump flow switch in the embodiment is done as described below:

Referring to shown in Fig. 3~Fig. 8, in the pump housing flow that the fluid pump of the present embodiment is installed to fluid pump with flow switch After at detection mouth, after fluid enters valve casing, spool 4 is moved under the impetus of fluid along the axial direction of the cavity 10 of shell 1 Dynamic, 4 compressed spring 6 of the spool deformation of axial movement makes spring 6 that elastic deformation occur, magnet 5 also can be with the axial direction of spool 4 It is mobile that axial displacement occurs, so that being subjected to displacement offset between magnet 5 and tongue tube 3；

When the flow of fluid increases, magnet 5 can axially move with spool 4, until magnet 5 does not incude tongue tube 3 When (offset between magnet 5 and tongue tube 3 at this time be more than certain distance), tongue tube 3 no longer control motor and works, at this time through pumping The Fluid Volume that body flows into will continue to increase；

When the flow of fluid reduces, entire spool 4 can move under the rebound effect of spring 6, and spring 6 occurs elongation and restores Deformation, magnet 5 at this time incude tongue tube 3, and tongue tube 3 controls motor and is in starting state always.

The fluid pump is installed at the pump housing flow detection mouth of fluid pump with flow switch for convenience, it can also be in shell It is formed with the fillet of screw on the end of body 1, to be tightened at pump housing flow detection mouth.

Although the preferred embodiments of the utility model have been described above in detail, it is to be clearly understood that for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.

Claims

1. improved fluid pump flow switch, including valve casing and spool, which is characterized in that the valve casing includes:

Shell (1), the shell (1) have the cavity (10) of both ends open, have connection cavity (10) on the side wall of shell (1) Apopore (11)；

It covers (2), the capping (2) is detachable on shell (1), so that capping (2) and shell (1) form chamber resettling (20)；It is formed on the capping (2) and extends towards the chamber resettling (20) direction and enter prolonging in chamber resettling (20) Extending portion (21), the extension (21) is provided with can be with magnet cooperation to control the tongue tube (3) whether electric motor starting；

The spool (4) is axially displaceably located in chamber resettling (20), and the spool (4) has hollow cavity (40), in The magnet (5) of cooperation tongue tube (3) is provided in cavity body (40)；The outer sheath of the spool (4) is equipped with spring (6), spring (6) In chamber resettling (20)；Wherein, in the spool (4) due to being acted on by the fluid forces entered in chamber resettling (20) When moving axially, which has compressed trend.

2. fluid pump flow switch according to claim 1, which is characterized in that magnet (5) ring is located at spool (4) Hollow cavity (40) in.

3. fluid pump flow switch according to claim 1, which is characterized in that have on the inner sidewall of the shell (1) There is the guide groove (12) of the axial direction formation along cavity (10), the spool (4) has can be on guide groove (12) interior edge The guide groove forms direction and does mobile guide pad (41).

4. fluid pump flow switch according to claim 1, which is characterized in that formed on the peripheral wall of the shell (1) There is L-shaped card slot, which has the vertical section (13) and horizontal segment (14) of linking, and having on the capping (2) can be certainly The vertical section (13) of the card slot enters and snaps onto the card column (23) of horizontal segment (14).

5. fluid pump flow switch according to claim 1, which is characterized in that have on the side wall of the spool (4) It is connected to the inlet opening (42) of hollow cavity (40), the extension of the hollow cavity (40) of the spool (4) and the capping (2) (21) water space (43) were formed between.

6. described in any item fluid pump flow switches according to claim 1~5, which is characterized in that shape on the capping (2) At there are accommodation groove (22), the control panel (7) of connection tongue tube (3) is provided in the accommodation groove (22).

7. fluid pump flow switch according to claim 6, which is characterized in that the capping (2) is fastened with closing institute The fastening cap (8) of accommodation groove (22) is stated, which is located at the outside of shell (1).

8. described in any item fluid pump flow switches according to claim 1~5, which is characterized in that the spool (4) includes Pedestal (44) and the guide part (45) as made of axial direction extension of the pedestal (44) along hollow cavity (40), the hollow cavity Body (40) penetrates through pedestal (44) and guide part (45).

9. fluid pump flow switch according to claim 1, which is characterized in that between capping (2) and the shell (1) It is provided with sealing ring (91)；Or the lower end of the shell (1) has the sidewall direction along shell around the washer being arranged (92)。