CN208380903U - pressure switch suitable for pump - Google Patents

Abstract

The utility model relates to a kind of pressure switches suitable for pump, the problems such as solving caused by the pressure switch frequent starting of the prior art, its scheme: check-valves: outer pressure tappings on the valve seat, setting non-return passage and current by pass in the valve seat, the non-return passage includes inlet segment and non-return section, the water inlet end of the current by pass is connected to the inlet segment, and the outer pressure tappings are connected to the inlet segment, and the water outlet of the current by pass is connected to the non-return section；Switch body: on detection components interior pressure tappings and the sense channel cooperate, the outer pressure end of the detection components and the outer pressure tappings cooperate, and the inner end of the interior pressure tappings closed component and the interior pressure tappings cooperate, and outer end and the outer pressure tappings cooperate.Its effect:, under water condition, can effectively solve the problems, such as that automatic pump fails, avoiding user from debugging pressure switch value containing impurity such as silts, user-friendly, avoid switch frequent movement.

Description

Pressure switch suitable for pump

Technical field

The utility model relates to a kind of pressure switches suitable for pump.

Background technique

Existing market water pump is provided with pressure switch, and the water outlet of pump is arranged between pressure switch, passes through variation in water pressure Carry out control switch power on/off to realize pump automatic start-stop.When water pump is applied to the unstable operating condition of inlet pressure, inlet pressure Fluctuation will cause water-aspirator pressure variation, and it is unstable in turn result in discharge pressure, so that pressure switch frequent start-stop.Usual situation Under, user needs to adjust pressure switch start and stop value to be adjusted, and to adapt to the water pressures of different operating conditions, brings to user Certain inconvenience.When hydraulic pressure is unstable, when pressure switch frequent movement, switch contact is serious because electric arc will lead to contact wear, Reduce service life.Some region water quality are more containing silt, and pressure switch import is easy stall failure, need often to clear up, and And switch failure, user close tap, water pump is not also shut down, and water pump continuous running persistently does work to water, upper cover, O-ring etc. Part causes leak because of temperature distortion, and pump seal is caused to fail, serious conditions, and hot water overflows scald user.

Presently, there are the problem of:

1, pressure switch value needs are adjusted according to operating condition.

2, pressure switch frequent starting due to water pressure fluctuations damages.

3, switch is blocked vulnerable to impurity, causes water pump control failure.

Summary of the invention

A kind of pressure suitable for pump is provided utility model aims to solve the above problem of the existing technology Power switch, avoids pressure switch from being adjusted in real time according to operating condition, is also beneficial to prevent pressure switch frequent starting and damage, also favorably In avoid impurity block and cause pressure switch effect out of hand, be conducive to that water pump is enable to operate normally always, and improve Service life.

What the above-mentioned technical purpose of the utility model mainly solved by the following technical programs: the pressure suitable for pump is opened It closes, characterized by comprising:

Check-valves: including valve seat and spool, being arranged valve seat water inlet, valve seat water outlet and outer pressure tappings on the valve seat, It is logical that setting non-return passage and current by pass in the valve seat, the valve seat water inlet and valve seat water outlet are located at the non-return The both ends in road, the spool are arranged on the non-return passage, and the water inlet end of the current by pass is connected to the non-return passage, The outer pressure tappings are connected to the non-return passage；

Switch body: it is arranged on the valve seat, the switch body includes switch base, and the detection components in switch base are arranged in And sense channel, the interior pressure tappings of the detection components and the sense channel cooperate, the outer pressure end of the detection components with The outer pressure tappings cooperation, the sense channel are connected to the current by pass, and interior pressure tappings envelope is arranged in the detection components Component is closed, the inner end of the interior pressure tappings closed component and the interior pressure tappings cooperate, and outer end and the outer pressure tappings cooperate.

When the big flow on the pump housing enters check-valves, spool is open, and non-return passage is opened, while pushing interior pressure tappings Closed component is switched on and off internal side push, so that the inner side and outer side of interior pressure tappings closed component is generated pressure difference, makes interior pressure tappings Closed component closes interior pressure tappings, and detection components is made to stop the detection to pressure.When big flow, when rubber diaphragm acts, pressure Power very little has reached pressure activated switch value, has controlled pump startup, after rubber diaphragm blocks interior pressure tappings, pressure switch sense By less than variation in water pressure, water pump continuous running.

When small flow, the hydraulic pressure that water flow enters valve seat water inlet is not enough to that spool is pushed to act, and non-return passage, which is in, to be begun Whole closed state, water flow enter sense channel by current by pass, at this time in the inside of pressure tappings closed component and outer Side no pressure is poor, and interior pressure tappings closed component opens interior pressure tappings, and the detection components in switch body detect at interior pressure tappings Hydraulic pressure, and then stopping signal is generated, shut down water pump.

In use, the variation of water flow pressure makes interior pressure tappings closed component movement (open or close interior pressure Mouthful), impurity can be removed, avoids blocking interior pressure tappings, keeps the operating sensitivity of pressure switch.

As further improving and supplementing to above-mentioned technical proposal, the utility model uses following technical measures: described Discharge orifice is set on valve seat, and the setting position of the discharge orifice is adapted with the position of the outer pressure tappings, and the discharge orifice is The water inlet of the current by pass.In practical applications, in order to facilitate processing, the axis of the discharge orifice and the non-return passage Axis it is parallel.

Return port is set on the valve seat, the return port is the outlet of the current by pass, the return port with it is described The water inlet of sense channel is connected to.

For the axis of the return port perpendicular to the axis of the non-return passage, the return port is bell shape, described Water inlet of the bell-mouthed big mouth towards the sense channel.At the return port of bell shape, since sectional area becomes larger, water Flow velocity degree becomes smaller, and impurity can become smaller because of water flow and own wt falls down and is unlikely to accumulated plugging return port runner, detects and lead to Road, interior pressure tappings, make the detection components in switch body smoothly detect pressure.

At least two round spacer rings of setting, the two spacer ring eccentric settings, two spacer rings are set on the valve seat Between form gap, the return port is arranged in gap.Return port is arranged between two circular spacer rings, two circulars Spacer ring eccentric setting forms an interstitial spaces, just forms the position of setting return port, and being made into circular is in order to facilitate machine Tool processing, dimensional machining accuracy can also be guaranteed, and be also beneficial to promote processing efficiency, connect moreover, being also beneficial to be promoted to process The precision of contacting surface.It is also beneficial to make to be sealed in the seal with O ring between valve seat and switch base and forms better seal performance.Setting At eccentric state, production can be facilitated to install, wrongly installed direction and causing hole site of flowing back is avoided to be held down, this void space just shape At return port runner, water flow is enable smoothly to be flowed into sense channel.

The interior pressure tappings closed component includes rubber diaphragm and detection spring, and the rubber diaphragm is in bowl-type, is buckled in On the valve seat, the inside of the rubber diaphragm and the interior pressure tappings cooperate, and described detection spring one end is supported on described open On the inner wall for closing seat, the other end is supported on the inside of the rubber diaphragm.When (elastic force direction is directed toward stops the elastic force in detection spring Go back to channel) it is identical with pressure (the pressure direction direction rubber diaphragm) at outer pressure tappings when, interior take is left on the inside of rubber diaphragm Mouth is pressed, detection components are able to detect that weep pressure, and generating signal shuts down water pump.When the elastic force (bullet in detection spring Power direction be directed toward non-return passage) be less than outer pressure tappings at pressure (pressure direction direction rubber diaphragm) when, rubber diaphragm is pushed away Open, make pressure tappings in the inner closed of rubber diaphragm, detection components can't detect water flow pressure, illustrate that water flow is larger, water pump after Continuous work.

One T shape portion is set on the rubber diaphragm, and T shape portion is structure as a whole with the rubber diaphragm, T shape portion Shoulder be disk portion, the disk portion and the interior pressure tappings cooperate, and the foot in T shape portion is inserted link portion, the inserted link Portion is inserted into the outer pressure tappings.In order to smoothly completely enclose interior pressure tappings, the corresponding site on rubber diaphragm is disk portion. In order to which the motion profile to rubber diaphragm limits, it is made only to do linear reciprocating motion, the foot in T shape portion is inserted link shape, Enable the active force on rubber diaphragm that rubber diaphragm to be pushed to move in a straight line.

Furthermore, it is understood that the axial cross section of the balance element is π shape, described with unification balance element on the rubber diaphragm Balance element includes cylindrical portion and annular portion, and the outer diameter of the cylindrical portion is adapted with the outer pressure tappings internal diameter, the cylindrical portion The outer pressure tappings are inserted into, the middle part of the annular portion has circular hole, and the inserted link portion is inserted into the circular hole, and the inserted link portion is set Position limiting convex ring is set, the annular portion is limited between the position limiting convex ring and the rubber diaphragm.Balance element and outer pressure tappings Cooperation, the cooperation of balance element and inserted link portion, it can be ensured that rubber diaphragm moves in a straight line always.

The edge of the rubber diaphragm, one bullet of fit inside of the rubber diaphragm are pushed down in the valve seat and switch base cooperation The respective end of spring stacker, the detection spring is arranged on the spring stacker.The setting of spring stacker has been to be Enable spring smoothly stable setting.The fixation at the edge of rubber diaphragm pushes up rubber diaphragm only under pressure Out and reset response.

Correspond to setting rotation card slot in the exit on the valve seat, the spool includes valve core and the spool The revotating card Button Block of body cooperation, the reset spring being nested on the valve core, the revotating card Button Block and the reset spring Cooperation, the revotating card Button Block and the rotation card slot cooperate.The cooperation for rotating card slot and revotating card Button Block, facilitates setting spool Body.The setting of reset spring then makes have certain active force on valve core, and when water flow pressure is greater than active force, valve core is It can be open, the water flow pressure for being arranged in current by pass generates the critical pressure of stopping signal for pressure switch to be arranged Power.

The utility model has the advantages that

1., under water condition, can effectively solve the problems, such as automatic pump failure, avoiding using containing impurity such as silts Pressure switch value is debugged at family, user-friendly；Switch frequent movement is avoided, pressure switch service life is extended.Structure benefit Current stabilization pressure, installation operation can be realized with the components cooperation such as detection spring, the spool of rubber diaphragm, conflict on rubber diaphragm Simply, realize that benefit is big.

2. the flow channel shape of return port is bell mouth shape, prevent impurities in water from entering sense channel, and be accumulated in detection group Interior pressure tappings are blocked on part, when water sprays to top from down, runner is broadened by narrow, and water flow can be from fast to slow, and impurity can be due to certainly Body gravity, slides at horn mouth, will not come heap in sense channel.

3. return port is arranged between two circular spacer rings, two spacer ring eccentric settings form an interstitial spaces, return Position is arranged in interstitial spaces in discharge orifice, is made into circular spacer ring and then facilitates and is machined, and dimensional accuracy is guaranteed and adds Work improved efficiency processes contact surface precision improvement, is conducive to facilitate installation, avoids wrongly installed direction and push down return port, make to flow back Hole can be smoothly connected to sense channel.Moreover, the O-ring seals sealing performance being arranged between valve seat and switch base is more preferable.

4. rubber diaphragm is acted because of the pressure difference of its upside (inside) and downside (outside), lateral pressure is greater than upper instantly Lateral pressure, rubber diaphragm bounce pressure tappings in blocking, and detection components do not detect pressure, and pressure switch is failure to actuate, and water pump can be after It is continuous to carry out.Instantly lateral pressure is less than upper lateral pressure, and rubber diaphragm rebound is fallen, and interior pressure tappings are connected to sense channel, detection group Part detects pressure.Rubber diaphragm moves up and down, rubber diaphragm volume change, generates water flowing, can remove heap in sense channel Product foreign matter, to avoid the blocking of interior pressure tappings.

5. in use, before completely closing the tap connecting with water pump, when water flow is greater than 0.3m3/h, rubber diaphragm Pressure tappings in blocking are bounced, water pump can work always, be avoided that pressure switch because of water pressure fluctuations frequent movement.When water flow is less than When 0.3m3/h, the pressurized tank that is connect with pressure switch can makeup water stream, delay pressure switch movement, the same pressure that reduces opens Action frequency is closed, pressure switch service life is postponed.

6. setting rotation card slot, facilitates the revotating card Button Block on spool to install on the valve seat of valve seat water outlet, without peace Holding tool promotes installation effectiveness, simple readily removable, convenient to overhaul.

Detailed description of the invention

Fig. 1 be the utility model relates to pressure switch lead to great deal running water when a kind of structural schematic diagram.

Fig. 2 be the utility model relates to pressure switch lead to small flow water flow when a kind of structural schematic diagram.

Fig. 3 is a kind of structural schematic diagram of valve seat in the utility model.

Fig. 4 is the structural schematic diagram in the direction E-E in Fig. 3.

Fig. 5 is the structural schematic diagram in the direction F-F in Fig. 4.

Fig. 6 is the structural schematic diagram in the direction G-G in Fig. 5.

Fig. 7 is the structural schematic diagram in the direction B-B in Fig. 5.

Specific embodiment

Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.

Embodiment: as shown in figs. 1-7, the pressure switch suitable for pump, comprising:

Check-valves: valve seat water inlet 11, valve seat water outlet 12 are set including valve seat 1 and spool, on the valve seat and taken outside Mouth 13, setting non-return passage and current by pass 15 in the valve seat are pressed, the valve seat water inlet 11 and valve seat water outlet 12 are distinguished Positioned at the both ends of the non-return passage, the spool is arranged 14 on the non-return passage, and the non-return passage includes inlet segment 14-1 and non-return section 14-2, the valve core on spool is between the inlet segment and non-return section, the water inlet of the current by pass End be connected to the inlet segment, the outer pressure tappings are connected to the inlet segment, the water outlet of the current by pass 15 with it is described The connection of non-return section；

Switch body: it is arranged on the valve seat 1, the switch body includes switch base 21, and the detection in switch base is arranged in Component and sense channel 22, the interior pressure tappings 23 of the detection components and the sense channel 22 cooperate, the detection components Outer pressure end and the outer pressure tappings 13 cooperate, and the sense channel 22 is connected to the current by pass 15, the detection components Pressure tappings closed component in upper setting, the inner end of the interior pressure tappings closed component and the interior pressure tappings 23 cooperate, outer end with The outer pressure tappings 13 cooperate.

When the big flow on the pump housing enters check-valves, spool is open, and non-return passage is opened, while pushing interior pressure tappings Closed component is switched on and off internal side push, so that the inner side and outer side of interior pressure tappings closed component is generated pressure difference, makes interior pressure tappings Closed component closes interior pressure tappings, and detection components is made to stop the detection to pressure, and pressure switch does not generate start stop signal, makes water pump It works on.

When small flow, the hydraulic pressure that water flow enters valve seat water inlet is not enough to that spool is pushed to act, and non-return passage, which is in, to be begun Whole closed state, water flow enter sense channel by current by pass, at this time in the inside of pressure tappings closed component and outer Side no pressure is poor, and interior pressure tappings closed component opens interior pressure tappings, and the detection components in switch body detect at interior pressure tappings Hydraulic pressure, and then stopping signal is generated, shut down water pump.

In use, the variation of water flow pressure makes interior pressure tappings closed component movement (open or close interior pressure Mouthful), impurity can be removed, avoids blocking interior pressure tappings, keeps the operating sensitivity of pressure switch.

Discharge orifice 16, the position phase of the setting position and the outer pressure tappings 13 of the discharge orifice are set on the valve seat 1 Adaptation, the discharge orifice 16 are the water inlet of the current by pass 15.In practical applications, in order to facilitate processing, the aerial drainage The axis in hole 16 is parallel with the axis of the non-return passage.

On the valve seat 1 be arranged return port 17, the return port be the current by pass 15 outlet, the return port with The water inlet of the sense channel is connected to.

For the axis of the return port 17 perpendicular to the axis of the non-return passage, the return port is bell shape, institute State water inlet of the bell-mouthed big mouth towards the sense channel 22.At the return port of bell shape, since sectional area becomes Greatly, water velocity becomes smaller, and impurity can become smaller because of water flow and own wt falls down and is unlikely to accumulated plugging return port runner, inspection Channel, interior pressure tappings are surveyed, the detection components in switch body is made smoothly to detect pressure.

At least two round spacer rings 18 of setting are set on the valve seat 1, the two spacer ring eccentric settings, two it is described every Gap is formed between ring, the return port 17 is arranged in gap.Return port is arranged between two circular spacer rings, and two just Round spacer ring eccentric setting forms an interstitial spaces, just forms the position of setting return port, being made into circular is for side Just it is machined, dimensional machining accuracy can also be guaranteed, and be also beneficial to promote processing efficiency, add moreover, being also beneficial to be promoted The precision of work contact surface.It is also beneficial to make to be sealed in the O-ring seals 3 between valve seat and switch base and forms better sealing Energy.It is provided off state, production can be facilitated to install, wrongly installed direction is avoided and reflux hole site is caused to be held down, this gap is empty Between just form return port runner, so that water flow is smoothly flowed into sense channel.

The interior pressure tappings closed component includes rubber diaphragm 41 and detection spring 42, and the rubber diaphragm is in bowl-type, It is buckled on the valve seat 1, the inside of the rubber diaphragm and the interior pressure tappings 23 cooperate, 42 one end of detection spring support On the inner wall of the switch base 21, the other end is supported on the inside of the rubber diaphragm.When the elastic force (elastic force in detection spring Direction be directed toward non-return passage) it is identical as pressure (the pressure direction direction rubber diaphragm) at outer pressure tappings when, rubber diaphragm it is interior Interior pressure tappings are left in side, and detection components are able to detect that weep pressure, and generating signal shuts down water pump.When in detection spring Elastic force (elastic force direction be directed toward non-return passage) when being less than pressure (the pressure direction direction rubber diaphragm) at outer pressure tappings, rubber Diaphragm is open, and makes pressure tappings in the inner closed of rubber diaphragm, and detection components can't detect water flow pressure, illustrates water flow pressure Larger, water pump works on.

One T shape portion is set on the rubber diaphragm, and T shape portion is structure as a whole with the rubber diaphragm, T shape portion Shoulder be disk portion 41-1, the disk portion and the interior pressure tappings cooperate, and the foot in T shape portion is inserted link portion 41-2, The inserted link portion is inserted into the outer pressure tappings.Corresponding site in order to smoothly completely enclose interior pressure tappings, on rubber diaphragm For disk portion.In order to which the motion profile to rubber diaphragm limits, it is made only to do linear reciprocating motion, the foot in T shape portion is Inserted link shape enables the active force on rubber diaphragm that rubber diaphragm to be pushed to move in a straight line.

Furthermore, it is understood that the axial cross section of the balance element is π shape, described with unification balance element on the rubber diaphragm Balance element includes cylindrical portion 43-1 and annular portion 43-2, and the outer diameter of the cylindrical portion is adapted with the outer pressure tappings internal diameter, institute It states cylindrical portion and is inserted into the outer pressure tappings, the middle part of the annular portion has circular hole, and the inserted link portion is inserted into the circular hole, described Position limiting convex ring 41-3 is arranged in inserted link portion, and the annular portion is limited between the position limiting convex ring and the rubber diaphragm.Balance element The cooperation of cooperation, balance element and inserted link portion with outer pressure tappings, it can be ensured that rubber diaphragm moves in a straight line always.

The edge of the rubber diaphragm, one bullet of fit inside of the rubber diaphragm are pushed down in the valve seat and switch base cooperation The respective end of spring stacker 44, the detection spring is arranged on the spring stacker.The setting of spring stacker is In order to enable spring smoothly stable setting.The fixation at the edge of rubber diaphragm does rubber diaphragm only under pressure Ejection and reset response.

On the valve seat 1 correspond to the exit setting rotation card slot 19, the spool include valve core 51, with it is described The revotating card Button Block 52 of valve core cooperation, is nested with the reset spring 53 on the valve core, the revotating card Button Block with it is described Reset spring cooperation, the revotating card Button Block and the rotation card slot cooperate.The cooperation of card slot and revotating card Button Block is rotated, it is convenient Valve core is set.The setting of reset spring then makes have certain active force on valve core, when water flow pressure is greater than active force, Valve core can be open, the water flow pressure for being arranged in current by pass, generate stopping signal for pressure switch to be arranged Critical pressure.

In use, before completely closing the tap connecting with water pump, when water flow is greater than 0.3m3/h, rubber diaphragm bullet Pressure tappings in blocking are acted, water pump can work always, be avoided that pressure switch because of water pressure fluctuations frequent movement.When water flow is less than When 0.3m3/h, the pressurized tank that is connect with pressure switch can makeup water stream, delay pressure switch movement, the same pressure that reduces opens Action frequency is closed, pressure switch service life is postponed.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model.Above-mentioned In embodiment, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model, made Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this utility model.

Claims (10)

1. being suitable for the pressure switch of pump, characterized by comprising:

Check-valves: including valve seat and spool, being arranged valve seat water inlet, valve seat water outlet and outer pressure tappings on the valve seat, described Setting non-return passage and current by pass, the valve seat water inlet and valve seat water outlet are located at the non-return passage in valve seat Both ends, the spool are arranged on the non-return passage, and the non-return passage includes inlet segment and non-return section, the current by pass Water inlet end be connected to the inlet segment, the outer pressure tappings are connected to the inlet segment, the water outlet of the current by pass with The non-return section connection；

Switch body: it is arranged on the valve seat, the switch body includes switch base, and detection components and inspection in switch base are arranged in Survey channel, the interior pressure tappings of the detection components and the sense channel cooperate, the outer pressure end of the detection components with it is described Outer pressure tappings cooperation, the sense channel are connected to the current by pass, and interior pressure tappings closed group is arranged in the detection components Part, the inner end of the interior pressure tappings closed component and the interior pressure tappings cooperate, and outer end and the outer pressure tappings cooperate.

2. the pressure switch according to claim 1 for being suitable for pump, it is characterised in that discharge orifice, institute are arranged on the valve seat The setting position for stating discharge orifice is adapted with the position of the outer pressure tappings, and the discharge orifice is the water inlet of the current by pass Mouthful.

3. the pressure switch according to claim 2 for being suitable for pump, it is characterised in that return port, institute are arranged on the valve seat The outlet that return port is the current by pass is stated, the return port is connected to the water inlet of the sense channel.

4. it is according to claim 3 be suitable for pump pressure switch, it is characterised in that the axis of the return port perpendicular to The axis of the non-return passage, the return port are bell shape, and the bell-mouthed big mouth is towards the sense channel Water inlet.

5. the pressure switch according to claim 4 for being suitable for pump, it is characterised in that be arranged on the valve seat and be at least arranged Two round spacer rings, the two spacer ring eccentric settings form gap between two spacer rings, and the return port is arranged in sky In gap.

6. the pressure switch according to any one of claims 1-5 for being suitable for pump, it is characterised in that the interior pressure tappings Closed component includes rubber diaphragm and detection spring, and the rubber diaphragm is in bowl-type, is buckled on the valve seat, the rubber membrane The inside of piece and the interior pressure tappings cooperate, and described detection spring one end is supported on the inner wall of the switch base, other end branch Support is in the inside of the rubber diaphragm.

7. the pressure switch according to claim 6 for being suitable for pump, it is characterised in that a T shape is arranged on the rubber diaphragm Portion, T shape portion are structure as a whole with the rubber diaphragm, and the shoulder in T shape portion is disk portion, the disk portion with it is described Interior pressure tappings cooperation, the foot in T shape portion are inserted link portion, and the inserted link portion is inserted into the outer pressure tappings.

8. the pressure switch according to claim 7 for being suitable for pump, it is characterised in that flat with unification on the rubber diaphragm Weigh part, and the axial cross section of the balance element is π shape, and the balance element includes cylindrical portion and annular portion, the outer diameter of the cylindrical portion It being adapted with the outer pressure tappings internal diameter, the cylindrical portion is inserted into the outer pressure tappings, and the middle part of the annular portion has circular hole, The inserted link portion is inserted into the circular hole, and the inserted link portion is arranged position limiting convex ring, the annular portion be limited in the position limiting convex ring with Between the rubber diaphragm.

9. the pressure switch according to claim 8 for being suitable for pump, it is characterised in that the valve seat and switch base match combined pressure State the edge of rubber diaphragm, the one spring stacker of fit inside of the rubber diaphragm, the respective end of the detection spring in residence Portion is arranged on the spring stacker.

10. the pressure switch according to claim 9 for being suitable for pump, it is characterised in that go out described in corresponding on the valve seat Setting rotation card slot at mouthful, the spool include valve core, the revotating card Button Block with valve core cooperation, are nested in the valve Reset spring on core, the revotating card Button Block and the reset spring cooperate, the revotating card Button Block and the revotating card Slot cooperation.