CN216344069U - Fixed pulse two-position three-way valve - Google Patents

Abstract

The utility model relates to a fixed pulse two-position three-way valve which comprises a valve body, a valve seat assembly, an execution assembly and a driving mechanism, wherein a main valve hole is formed in the valve body, a second outlet is formed in the bottom of the valve body, a main inlet is formed in the bottom of the right side of the valve body, a first outlet is formed in the top of the left side of the valve body, the valve seat assembly comprises a valve sleeve and a main sealing ring, the execution assembly comprises a valve core, a first supporting spring and a second supporting spring, the driving mechanism comprises a sleeve, a coil, a rotor, a nut, a screw rod, a stopping spring and a stopping ring, a pressing step is formed in the bottom of the screw rod, a avoiding groove is formed in the periphery of the valve sleeve, a through hole is formed in the avoiding groove, the first outlet is opposite to the avoiding groove, and a first sealing ring and a second sealing ring are sequentially arranged on the outer wall of the valve core from top to bottom. According to the utility model, the elastic connection between the screw and the valve core is realized by respectively arranging the first supporting spring and the second supporting spring at the upper end and the lower end of the pressing step, so that the problem that the valve core cannot be normally closed and opened due to the step loss of the rotor operation is compensated, and the stability of the system is improved.

Description

Fixed pulse two-position three-way valve

Technical Field

The utility model relates to the technical field of refrigerant control elements, in particular to a fixed pulse two-position three-way valve.

Background

The electronic expansion valve opens or closes a valve port on the valve body through the movement of the valve rod component in the guide sleeve and the nut sleeve, thereby realizing the purposes of flow regulation, throttling and pressure reduction and being widely applied in the technical field of refrigeration equipment. The refrigerant flow direction switching is generally realized by two electric ball valves or a three-way electric ball valve in the existing new energy system, and the electric ball valve generally comprises a driver, a speed reducing mechanism, a transmission mechanism and a ball valve. The stator coil of the driver (stepping motor) receives the pulse signal provided by the controller to drive the rotor magnetic ring to rotate, the torque is amplified through the speed reducing mechanism, and the force is transmitted to the ball valve through the transmission mechanism, so that the valve core is rotated, and the switching between the refrigerant flow channels is realized.

Because the existing electronic expansion valve uses coil fixed pulse to drive the rotor, the valve core can not be normally opened or closed when the rotor is out of step in the working process.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the prior art, the utility model aims to provide a fixed pulse two-position three-way valve.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a two three-way valves of definite pulse, include the valve body, set up in disk seat subassembly on the valve body, set up in execute subassembly is last and be used for the drive execute subassembly's actuating mechanism, be equipped with vertical main valve hole in the valve body, the valve body bottom be equipped with the second export of main valve hole intercommunication, valve body right side bottom be equipped with the main import of main valve hole intercommunication, valve body left side top be equipped with the first export of main valve hole intercommunication, disk seat subassembly including set up in the downthehole valve barrel of main valve, cover the main seal circle outside the valve barrel, execute subassembly including set up in case in the valve barrel, set up in the first supporting spring and the second supporting spring at case top, actuating mechanism including set up in the sleeve pipe at valve body top, set up in coil outside the sleeve pipe, The screw valve comprises a rotor arranged in a sleeve, a nut arranged at the top of the valve sleeve, a screw matched with the nut, a stop spring and a stop ring sleeved outside the nut, wherein the stop ring is positioned between adjacent spirals of the stop spring, one side of the nut is provided with a chute extending along the bus direction of the nut, one end of the stop ring extends into the chute, the top of the screw is in circumferential limit connection with the rotor, the bottom of the screw is provided with a pressing step, the top of the pressing step abuts against the bottom of the first support spring, the bottom of the pressing step abuts against the top of the second support spring, the top of the valve core is provided with an accommodating cavity for accommodating the first support spring and the second support spring, the top of the accommodating cavity is provided with a limit sleeve convenient for the screw to pass through, and the top of the first support spring abuts against the bottom of the limit sleeve, the bottom of the second supporting spring abuts against the bottom of the accommodating cavity, an avoiding groove moving along the circumferential direction of the valve sleeve is arranged on the periphery of the valve sleeve, a through hole penetrating through the side wall of the valve sleeve is formed in the avoiding groove, the first outlet is opposite to the avoiding groove, a first sealing ring and a second sealing ring are sequentially arranged on the outer wall of the valve core from top to bottom, the valve core is positioned in an upper limiting state, the top of the first sealing ring abuts against an opening in the bottom of an inner hole of the valve sleeve, namely the first sealing ring seals the opening in the bottom of the valve sleeve; the valve core is located in a lower limiting state, the second sealing ring abuts against the joint of the second outlet and the main valve hole, namely the second sealing ring seals the communication position of the second outlet and the main valve hole, and the main inlet is communicated with the side wall of the main valve hole below the valve sleeve.

In the design, the elastic connection between the screw rod and the valve core is realized by respectively arranging the first supporting spring and the second supporting spring at the upper end and the lower end of the pressing step, so that the problem that the valve core cannot be normally closed and opened due to the step loss of the rotor operation is compensated, and the stability of the system is improved.

As a further improvement of the design, a sliding hole is arranged in the valve sleeve above the through hole, the valve core is provided with a sliding shaft shoulder matched with the sliding hole, and an inner sealing ring is arranged in the sliding hole. The slide hole is convenient for the stable direction to the case, and the inner seal ring prevents that the refrigerant from leaking.

As a further improvement of the design, the valve core is provided with a balance flow passage which vertically penetrates through the valve core, and a balance hole which is communicated with the slide hole and the balance flow passage is arranged on the valve core above the sliding shaft shoulder. The balance flow channel is convenient for ensuring that the valve core is always in a pressure balance state in the switching process.

As a further improvement of the design, a supporting column inserted into the second supporting spring from the top of the second supporting spring is arranged in the accommodating cavity, and the top of the supporting column abuts against the bottom of the pressing step. The support post facilitates directional deformation of the second support spring.

As a further improvement of the design, the top of the first sealing ring is provided with a first sealing conical surface, the bottom of the second sealing ring is provided with a second sealing conical surface, an opening of an inner hole at the bottom of the valve sleeve is provided with a first fitting conical surface matched with the first sealing conical surface, and a second outlet is connected with the main valve hole and is provided with a second fitting conical surface matched with the second sealing conical surface. Effectively guarantee the leakproofness of case.

As a further improvement of this design, backstop spring top end is equipped with the extension of upwards extending, the rotor top is equipped with and is convenient for the hole of dodging that the extension ran through. The avoiding hole is convenient for circumferentially limiting the stop spring, the outer diameter of the avoiding hole is larger than the outer diameter of the section of the extending section, and the stop spring is prevented from being axially extruded by the rotor.

As a further improvement of this design, the first support spring and the second support spring are always in a compressed state. The valve core and the screw rod are always in an elastic connection state, and sealing failure caused by accidental sliding of the valve core is prevented.

As a further improvement of this design, the sliding shoulder, the first seal ring and the second seal ring have the same outer diameter. The fluid pressure balance of the upper and lower parts of the valve core is ensured.

As a further improvement of the design, the compression stroke of the first supporting spring and the second supporting spring is larger than the up-and-down movement stroke of the valve core, so that the elastic connection between the valve core and the screw rod is always ensured.

As a further improvement of the design, the top surface and the bottom of the compression step are plane or spherical surfaces. The centering is ensured, the spring is prevented from being twisted, and the spring force always acts on the axis.

The utility model has the beneficial effects that: according to the utility model, the elastic connection between the screw and the valve core is realized by respectively arranging the first supporting spring and the second supporting spring at the upper end and the lower end of the pressing step, so that the problem that the valve core cannot be normally closed and opened due to the step loss of the rotor operation is compensated, and the stability of the system is improved.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is an overall sectional structure diagram of the present invention.

Fig. 2 is a partial cross-sectional schematic view of the present invention.

Fig. 3 is a cross-sectional view of the rotor and stop spring combination of the present invention.

In the drawing, 1, a valve body, 2, a through hole, 3, an inner sealing ring, 4, a sliding shaft shoulder, 5, a main sealing ring, 6, a balance hole, 7, a support column, 8, a sliding hole, 9, an avoiding groove, 10, a second support spring, 11, a valve core, 12, a main inlet, 13, a first sealing ring, 14, a second sealing ring, 15, a second outlet, 16, a main valve hole, 17, a balance flow passage, 18, a first outlet, 19, a first support spring, 20, a limiting sleeve, 21, a stop ring, 22, a stop spring, 23, a sleeve, 24, a coil, 25, a rotor, 26, a nut, 27, a screw rod, 28, a valve sleeve, 29, a pressing step, 30, a containing cavity, 31, a sliding groove, 32, a second sealing conical surface, 33, a first sealing conical surface, 34, a first attaching conical surface, 35, a second attaching conical surface, 36, an extending section and 37 avoiding holes are formed.

Detailed Description

The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.

Example (b): the utility model provides a two three-way valves of definite pulse, include valve body 1, set up in disk seat subassembly on the valve body 1, set up in execute subassembly is last and be used for the drive execute subassembly's actuating mechanism, be equipped with vertical main valve hole 16 in the valve body 1, 1 bottom of valve body be equipped with the second export 15 of main valve hole 16 intercommunication, 1 right side bottom of valve body be equipped with the main import 12 of main valve hole 16 intercommunication, 1 left side top of valve body be equipped with the first export 18 of main valve hole 16 intercommunication, the disk seat subassembly including set up in valve barrel 28 in the main valve hole 16, cover the main seal circle 5 outside the valve barrel 28, execute subassembly including set up in case 11 in the valve barrel 28, set up in first supporting spring 19 and the second supporting spring 10 at case 11 top, actuating mechanism including set up in the sleeve pipe 23 at valve body 1 top, The coil 24 is arranged outside the sleeve 23, the rotor 25 is arranged inside the sleeve 23, the nut 26 is arranged at the top of the valve sleeve 28, the screw 27 is matched with the nut 26, the stop spring 22 and the stop ring 21 are sleeved outside the nut 26, the stop ring 21 is positioned between the adjacent spirals of the stop spring 22, a chute 31 extending along the bus direction of the nut 26 is arranged on one side of the nut 26, one end of the stop ring 21 extends into the chute 31, the top of the screw 27 is circumferentially and limitedly connected with the rotor 25, a pressing step 29 is arranged at the bottom of the screw 27, the top of the pressing step 29 abuts against the bottom of the first support spring 19, the bottom of the pressing step 29 abuts against the top of the second support spring 10, and an accommodating cavity 30 for accommodating the first support spring 19 and the second support spring 10 is arranged at the top of the valve core 11, the top of the accommodating cavity 30 is provided with a limiting sleeve 20 through which the screw 27 can conveniently penetrate, the top of the first supporting spring 19 abuts against the bottom of the limiting sleeve 20, the bottom of the second supporting spring 10 abuts against the bottom of the accommodating cavity 30, the periphery of the valve sleeve 28 is provided with an avoiding groove 9 moving along the circumferential direction of the valve sleeve 28, a through hole 2 penetrating through the side wall of the valve sleeve 28 is arranged in the avoiding groove 9, the first outlet 18 is opposite to the avoiding groove 9, the outer wall of the valve core 11 is sequentially provided with a first sealing ring 13 and a second sealing ring 14 from top to bottom, the valve core 11 is in an upper limiting state, the top of the first sealing ring 13 abuts against an opening at the bottom of an inner hole of the valve sleeve 28, namely the first sealing ring 13 seals the opening at the bottom of the valve sleeve 28; when the valve core 11 is in the lower limit state, the second sealing ring 14 abuts against the joint of the second outlet 15 and the main valve hole 16, that is, the second sealing ring 14 seals the communication between the second outlet 15 and the main valve hole 16, and the main inlet 12 is communicated with the side wall of the main valve hole 16 below the valve sleeve 28.

In the design, the elastic connection between the screw 27 and the valve core 11 is realized by respectively arranging the first supporting spring 19 and the second supporting spring 10 at the upper end and the lower end of the pressing step 29, so that the problem that the valve core 11 cannot be normally closed and opened due to the step loss of the operation of the rotor 25 is compensated, and the stability of the system is improved.

As a further improvement of the design, a sliding hole 8 is arranged in the valve sleeve 28 above the through hole 2, the valve core 11 is provided with a sliding shaft shoulder 4 matched with the sliding hole 8, and an inner sealing ring 3 is arranged in the sliding hole 8. The slide hole 8 is convenient for stably guiding the valve core 11, and the inner sealing ring 3 prevents the refrigerant from leaking.

As a further improvement of the design, the valve core 11 is provided with a balance flow passage 17 which vertically penetrates through the valve core 11, and the valve core 11 above the sliding shaft shoulder 4 is provided with a balance hole 6 which is communicated with the slide hole 8 and the balance flow passage 17. The balance flow passage 17 is convenient for ensuring that the valve core 11 is always in a pressure balance state in the switching process.

As a further improvement of the present design, a supporting pillar 7 inserted into the second supporting spring 10 from the top of the second supporting spring 10 is disposed in the accommodating cavity 30, and the top of the supporting pillar 7 abuts against the bottom of the pressing step 29. The support column 7 facilitates the directional deformation of the second support spring 10.

As a further improvement of the present design, a first sealing conical surface 33 is disposed at the top of the first sealing ring 13, a second sealing conical surface 32 is disposed at the bottom of the second sealing ring 14, a first fitting conical surface 34 fitted with the first sealing conical surface 33 is disposed at an opening of an inner hole at the bottom of the valve sleeve 28, and a second fitting conical surface 35 fitted with the second sealing conical surface 32 is disposed at a connection between the second outlet 15 and the main valve hole 16. The sealing performance of the valve core 11 is effectively ensured.

As a further improvement of the design, the top end of the stop spring 22 is provided with an extending section 36 extending upwards, and the top of the rotor 25 is provided with an avoiding hole 37 for the extending section 36 to penetrate through. Avoiding hole 37 facilitates circumferential limiting of stop spring 22, and avoiding hole 37 has an outer diameter larger than the outer diameter of the section of extension section 36, preventing rotor 25 from axially extruding stop spring 22.

As a further improvement of the present design, the first support spring 19 and the second support spring 10 are always in a compressed state. The valve core 11 and the screw 27 are always in an elastic connection state, and sealing failure caused by accidental sliding of the valve core 11 is prevented.

As a further improvement of the present design, the sliding shoulder 4, the first seal ring 13 and the second seal ring 14 have the same outer diameter. So as to ensure the balance of the fluid pressure on the valve core 11.

As a further improvement of the design, the compression stroke of the first supporting spring 19 and the second supporting spring 10 is larger than the up-and-down movement stroke of the valve core 11, and the elastic connection of the valve core 11 and the screw 27 is always ensured.

As a further improvement of the present design, the top and bottom of the pressing step 29 are flat or spherical.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The utility model provides a two three-way valves of definite pulse, include the valve body, set up in disk seat subassembly on the valve body, set up in execute subassembly is last and be used for the drive execute subassembly's actuating mechanism, a serial communication port, be equipped with vertical main valve hole in the valve body, the valve body bottom be equipped with the second export of main valve hole intercommunication, valve body right side bottom be equipped with the main import of main valve hole intercommunication, valve body left side top be equipped with the first export of main valve hole intercommunication, disk seat subassembly including set up in the downthehole valve barrel of main valve, cover the main seal circle outside the valve barrel, execute subassembly including set up in case in the valve barrel, set up in the first supporting spring and the second supporting spring at case top, actuating mechanism including set up in the sleeve pipe at valve body top, The coil is arranged outside the sleeve, the rotor is arranged in the sleeve, the nut is arranged at the top of the valve sleeve, the screw rod matched with the nut, the stop spring and the stop ring are sleeved outside the nut, the stop ring is positioned between the adjacent spirals of the stop spring, one side of the nut is provided with a chute extending along the bus direction of the nut, one end of the stop ring extends into the chute, the top of the screw rod is in circumferential limit connection with the rotor, the bottom of the screw rod is provided with a pressing step, the top of the pressing step abuts against the bottom of the first supporting spring, the bottom of the pressing step abuts against the top of the second supporting spring, the top of the valve core is provided with an accommodating cavity for accommodating the first supporting spring and the second supporting spring, the top of the accommodating cavity is provided with a limit sleeve for the screw rod to pass through, and the top of the first supporting spring abuts against the bottom of the limit sleeve, the bottom of the second supporting spring abuts against the bottom of the accommodating cavity, an avoiding groove moving along the circumferential direction of the valve sleeve is arranged on the periphery of the valve sleeve, a through hole penetrating through the side wall of the valve sleeve is formed in the avoiding groove, the first outlet is opposite to the avoiding groove, a first sealing ring and a second sealing ring are sequentially arranged on the outer wall of the valve core from top to bottom, the valve core is positioned in an upper limiting state, the top of the first sealing ring abuts against an opening in the bottom of an inner hole of the valve sleeve, namely the first sealing ring seals the opening in the bottom of the valve sleeve; the valve core is located in a lower limiting state, the second sealing ring abuts against the joint of the second outlet and the main valve hole, namely the second sealing ring seals the communication position of the second outlet and the main valve hole, and the main inlet is communicated with the side wall of the main valve hole below the valve sleeve.

2. The fixed pulse two-position three-way valve according to claim 1, wherein a sliding hole is formed in the valve sleeve above the through hole, the valve core is provided with a sliding shaft shoulder matched with the sliding hole, and an inner sealing ring is arranged in the sliding hole.

3. The fixed pulse two-position three-way valve according to claim 2, wherein the valve core is provided with a balance flow passage which vertically penetrates through the valve core, and the valve core above the sliding shaft shoulder is provided with a balance hole which is communicated with the sliding hole and the balance flow passage.

4. The fixed pulse two-position three-way valve according to claim 1, wherein a supporting column inserted into the second supporting spring from the top of the second supporting spring is arranged in the accommodating cavity, and the top of the supporting column abuts against the bottom of the pressing step.

5. The fixed pulse two-position three-way valve according to claim 1, wherein a first sealing conical surface is arranged at the top of the first sealing ring, a second sealing conical surface is arranged at the bottom of the second sealing ring, a first fitting conical surface matched with the first sealing conical surface is arranged at the opening of the inner hole at the bottom of the valve sleeve, and a second fitting conical surface matched with the second sealing conical surface is arranged at the joint of the second outlet and the main valve hole.

6. The two-position three-way valve for fixed pulses as claimed in claim 1, wherein the top end of the stop spring is provided with an extending section extending upwards, and the top of the rotor is provided with an avoiding hole for the extending section to penetrate through.

7. A fixed pulse two position three way valve according to claim 1 wherein the first support spring and the second support spring are always in compression.

8. A fixed pulse two position three way valve according to claim 2 wherein the sliding shoulder, the first seal ring and the second seal ring have the same outside diameter.

9. The fixed pulse two-position three-way valve according to claim 1, wherein the compression stroke of the first supporting spring and the second supporting spring is larger than the up-and-down movement stroke of the valve core.

10. A fixed pulse two-position three-way valve according to claim 1, wherein the top and bottom of the compression step are flat or spherical.

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