CN220118654U - Valve closing mechanism for stop valve, stop valve and air conditioner - Google Patents

Abstract

A valve closing mechanism for a stop valve, a stop valve and an air conditioner. The valve closing mechanism is configured to be attachable to the shut-off valve to switch the shut-off valve from an open valve state to a closed valve state, the valve closing mechanism comprising: a cover configured to be sealably mounted to a valve seat of the shut-off valve; a magnetic rotor rotatably mounted in the housing and rotatable therein under the influence of external magnetic force, the magnetic rotor being configured to be fixedly connected to the valve needle of the shut-off valve, wherein, with the shut-off valve mechanism mounted to the shut-off valve, when the magnetic rotor rotates under the influence of external magnetic force, the valve needle is configured to be rotatable with the magnetic rotor and movable in an axial direction, thereby moving the valve needle from the open valve position to the closed valve position.

Description

Valve closing mechanism for stop valve, stop valve and air conditioner

Technical Field

The utility model relates to a valve closing mechanism for a stop valve, a stop valve and an air conditioner.

Background

With the development of society, an air conditioner has become an important household appliance for various families, and can maintain the temperature in a house in a certain range in hot days or winter, thereby providing a good living environment for us.

The stop valve as an important auxiliary component in the air conditioner can prevent the refrigerant fluorine in the air conditioner from leaking, and the stop valve can be detached by a wrench when the air conditioner needs maintenance, so that the refrigerant fluorine in the air conditioner can be discharged.

However, when the shutoff valve is operated to switch from the valve-open state to the valve-closed state, it is necessary to detach the safety cap of the shutoff valve with a wrench and then operate the shutoff valve. After the operation is finished, the safety helmet is put back. However, during this time the helmet may not be installed in place, or even the operator forgets to put back the helmet, resulting in an external leak.

Disclosure of Invention

In order to overcome the above problems, avoiding the formation of an external leak point, the present utility model provides a valve closing mechanism for a shut-off valve configured to be mountable to the shut-off valve to switch the shut-off valve from an open valve state to a closed valve state, characterized by comprising: a cover configured to be sealably mounted to a valve seat of the shut-off valve; a magnetic rotor rotatably mounted in the housing and rotatable therein under the influence of external magnetic force, the magnetic rotor being configured to be fixedly connected to the valve needle of the shut-off valve, wherein, with the shut-off valve mechanism mounted to the shut-off valve, when the magnetic rotor rotates under the influence of external magnetic force, the valve needle is configured to be rotatable with the magnetic rotor and movable in an axial direction, thereby moving the valve needle from the open valve position to the closed valve position.

Advantageously, the valve needle is configured to move in an axial direction relative to the guide member while rotating within the guide member when the magnetic rotor is rotated by external magnetic force, thereby moving the valve needle from the open valve position to the closed valve position.

Advantageously, the magnetic rotor comprises a magnetic ring circumferentially arranged within the housing and a fixed seat fixed to the valve needle, the magnetic ring being fixed to the fixed seat.

Advantageously, the device further comprises a spring support arranged inside the magnetic ring and a first spring arranged between the spring support and the guide.

Advantageously, the opening of the guide comprises a first opening portion and a second opening portion, the inner surface of the first opening portion being provided with an internal thread, the inner surface of the second opening portion being a smooth surface, the first opening portion being smaller in size than the second opening portion such that a step is formed between the first opening portion and the second opening portion, the valve needle having a first section and a second section, the first section being smaller in size than the second section such that a corresponding step is formed between the first section and the second section, the corresponding step of the valve needle abutting the step between the first portion and the second portion in the closed position.

The utility model also provides a stop valve comprising a valve closing mechanism as described above.

Advantageously, the shut-off valve further comprises a guide sleeve arranged in the valve seat and fixedly mounted to the guide, the guide sleeve having a further opening for the valve needle to pass through.

Advantageously, the valve needle further comprises a third section, a part of the second section and the third section passing through the further opening of the guide sleeve, the second section having a smaller size than the third section such that a first gap is formed between the second section and the guide sleeve, a part of the third section being provided with a first bore, and the part of the third section being provided with the first bore having a smaller size than the further opening such that a second gap is formed between the part of the third section provided with the first bore and the guide sleeve, the first bore being in fluid communication with the valve port, the first gap and the second gap in the valve-closing position, the first bore being in fluid communication with the valve port and the second gap in the valve-opening position, the guide having a second bore in fluid communication with the first gap and the space in the cap in the valve-closing position, the second bore being in fluid communication with the second gap and the space in the cap in the valve-opening position.

Advantageously, a sealing ring is also included, arranged between the third section of the valve needle and the guide bush.

Advantageously, the needle comprises a conducting screw fixedly mounted to the fixed seat and having an external thread on an outer surface thereof, the guiding member being threaded via an open internal thread of the guiding member, and a sub-needle arranged in the guiding sleeve, the conducting screw passing through the sub-needle and being connected to the sub-needle.

Advantageously, the conductive screw has a first stepped portion and the sub-valve needle has a first corresponding stepped portion, the second spring being disposed between the first stepped portion and the first corresponding stepped portion, the second spring being in a compressed state in the valve closing position.

Advantageously, the conductive screw has a second stepped portion and the sub-valve needle has a second corresponding stepped portion, the resilient gasket being disposed between the second stepped portion and the second corresponding stepped portion, the resilient gasket being in a compressed state in the valve-closing position.

Advantageously, the outer part of the portion of the conductive screw extending through the sub-valve needle is provided with a fixing sleeve forming a second corresponding step.

Advantageously, a sealing ring is arranged between the sub-valve needle and the guide sleeve.

Advantageously, a gap is formed between the sub-valve needle and the guide sleeve, the sub-valve needle having a first bore in fluid communication with the gap and the valve port, and the guide having a second bore in fluid communication with the gap and the space within the housing, such that the first bore, the gap, the second bore, and the space within the housing are in fluid communication.

The utility model also provides an air conditioner which comprises the stop valve.

Drawings

The above and other features and advantages of exemplary embodiments of the present utility model will become more apparent from the following detailed description in conjunction with the accompanying drawings, which are provided for illustrative purposes only and do not limit the scope of the present utility model in any way, wherein:

fig. 1 shows a schematic view of an embodiment of a shut-off valve according to the utility model, in which the shut-off valve is in a closed state.

Fig. 2 shows a schematic diagram corresponding to fig. 1, in which the shut-off valve is in the open state.

Fig. 3 shows a schematic view of another embodiment of a shut-off valve according to the utility model, when the shut-off valve is in a closed state.

Fig. 4 shows a schematic view corresponding to fig. 3, in which the shut-off valve is in the open state.

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the specific embodiments of the present disclosure. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Possible implementations within the scope of the present disclosure may have fewer components, have other components not shown in the drawings, different components, differently arranged components, differently connected components, etc., than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Where the number of components is not specified, the number of components may be one or more; likewise, the terms "a," "an," "the," and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "mounted," "configured," "connected," or "connected" and the like are not limited to physical or mechanical mounting, configuration, connection, but may include electrical mounting, configuration, connection, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships when the apparatus is in use or positional relationships shown in the drawings, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly.

Before describing particular embodiments of the present utility model, it should be noted that during normal operation of the shut-off valve, it is typically in an open state, and that it is only necessary to switch the shut-off valve from the open state to the closed state when installed or removed, etc. For this reason, in this case, the valve closing mechanism of the present utility model may be mounted to the shut-off valve such that the cover of the valve closing mechanism is sealingly connected to the valve seat of the shut-off valve, thereby eliminating any external leakage points. The safety cap of the shut-off valve can be removed and the shut-off valve mechanism of the present utility model can then be sealingly attached to the valve seat of the shut-off valve and the magnetic rotor of the shut-off valve mechanism fixedly attached to the valve needle of the shut-off valve to effect the shut-off operation.

In the following description, for convenience of understanding, the shutoff valve is mainly described.

Fig. 1 shows a schematic view of an embodiment of a shut-off valve according to the utility model. The shut-off valve comprises a valve closing mechanism and a valve seat 1, wherein a cover 2 of the valve closing mechanism is sealingly connected to the valve seat 1, for example by welding or the like, so that the cover 2 substantially closes the valve seat, without any external leakage points.

The valve seat 1 includes a valve port a to which a first connection pipe T1 of the air conditioner is connected and a mouthpiece B to which a second connection pipe T2 of the air conditioner is connected. Those skilled in the art will recognize that the shut-off valve may be used to connect the indoor unit and the outdoor unit of the air conditioner, and then the first connection pipe may belong to one of the indoor unit and the outdoor unit, and the second connection pipe may belong to the other of the indoor unit and the outdoor unit.

The shut-off valve comprises a valve needle 4 extending into a valve seat in the axial direction of the shut-off valve. The valve needle 4 is movable up and down in the axial direction of the shut-off valve so as to move between a valve-opening position, in which the valve needle 4 does not block the valve port a, and a valve-closing position, in which the valve needle 4 blocks the valve port a.

The shut-off valve comprises a magnetic rotor 3 arranged in a housing 2, the magnetic rotor 3 comprising a magnetic ring 31 circumferentially arranged in the housing and a fixing seat 32 fixed to the magnetic ring. The magnetic rotor 3 is configured to rotate within the housing 2 under the influence of external magnetic force. The external magnetic force may be applied by, for example, a separate external magnetic ring (not shown) which may constitute, for example, a valve opener, which is used by a worker to sleeve the valve opener outside the housing 2 when it is necessary to open and close the shut-off valve, thereby applying the external magnetic force. It will be appreciated by those skilled in the art that the valve opener is not limited thereto and is not the focus of the present utility model, and may have any suitable form as long as it is capable of applying an external magnetic force to rotate the magnetic rotor 3. The valve needle 4 is fixedly mounted to the magnetic rotor 3, in particular to the fixed seat 32, by means of e.g. a snap spring 43, so that when the magnetic rotor 3 rotates, the valve needle 4 also rotates.

The guide 5 is fixedly arranged in the housing 2, in particular inside the magnet ring 31. The guide 5 has an opening through which the needle 4 passes. The guide 5 also has a further snap spring 55, which is arranged at the outer periphery of the guide and provides a force to engage the guide and the valve needle with each other, preventing disengagement due to unexpected circumstances. At least a part of the inner surface of the opening of the guide 5 is provided with an internal thread, for example the guide may be in the form of a nut. At least a part of the outer surface of the valve needle 4 is provided with an external thread. In the case where the needle 4 is screw-coupled to the guide 5, when the magnetic rotor 3 rotates the needle 4 together, the needle 4 moves up and down in the axial direction of the shut-off valve under the guide of the guide 5, thereby achieving movement between the valve-opening position and the valve-closing position.

The opening of the guide 5 includes a first opening portion 51, an inner surface of which is provided with an internal thread, and a second opening portion 52, an inner surface of which is a smooth surface, a size of which is smaller than that of the second opening portion, so that a step 53 is formed between the first opening portion and the second opening portion. The valve needle 4 has a first section 41 and a second section 42, the size of the first section being smaller than the size of the second section, such that a corresponding step 44 is formed between the first section and the second section. In the valve-closing position, the corresponding step 44 of the valve needle abuts a step 53 between the first and second portions, as shown in fig. 1; in the open position, the corresponding step 44 of the valve needle is spaced from the step 53, as shown in fig. 2. That is, in the valve-closing position, the step 53 abuts against the corresponding step 44, and serves as a stopper for the valve needle.

The shut-off valve further comprises a guide sleeve 6 fixedly mounted (e.g. by welding) in the valve seat 1 and fixedly mounted to the guide 5, the guide sleeve 6 having a further opening through which the valve needle passes. The valve needle 4 further comprises a third section 45, a part of the second section 42 and the third section 45 passing through a further opening of the guide sleeve 6, a substantial part of the third section 45 having a size corresponding to the size of the further opening, the size of the second section 42 being smaller than the size of the third section 45, such that a first gap 46 is formed between the second section 42 and the guide sleeve 6. A portion of the third section 45 is provided with the first hole 451, the size of the portion of the third section provided with the first hole 451 being smaller than the further opening, such that a second gap 452 is formed between the portion of the third section provided with the first hole 451 and the guide sleeve. In the closed valve position, the first aperture 451 is in fluid communication with the first gap 46, the second gap 452, and the valve port A, as shown in FIG. 1; in the open valve position, the first bore 415 is in fluid communication with the second gap 452 and the valve port A, as shown in FIG. 2.

The guide 5 has a second bore 54, as shown in fig. 1, the second bore 54 being in fluid communication with the first gap 46 and the space S in the housing in the closed position and the second bore 54 being in fluid communication with the second gap 452 and the space in the housing in the open position.

As described above, fluid communication between the valve port a and the space S in the housing is achieved by the first aperture 451, the first gap 46, the second gap 452, and the second aperture 54 (referred to as "balance aperture"), regardless of the valve closing position and the valve opening position, so that the upper and lower chamber pressures are the same, facilitating the valve closing and opening operations.

The shut-off valve further comprises a sealing ring 7 arranged between the third section of the valve needle and the guide bush, as shown in fig. 1, to achieve a seal between the valve needle and the guide bush.

The stop valve further comprises a spring support seat 8 arranged on the inner side of the magnetic ring and a first spring 9 arranged between the spring support seat and the guide piece, and self-locking force can be provided for the rotary part (magnetic rotor and the like) through the first spring, so that valve opening or valve closing actions caused by rotation of the rotary part due to unexpected vibration are prevented. In addition, the sealing ring 7 can also provide self-locking force to prevent the valve opening or closing action caused by the rotation of the rotating part due to unexpected vibration.

A shut-off valve according to a first embodiment of the present utility model is described above with reference to fig. 1 and 2. A shut-off valve according to a second embodiment of the present utility model is described below with reference to fig. 3 and 4. Most of the components of this second embodiment are identical to those of the first embodiment, and therefore only the differences between the second embodiment and the first embodiment, namely the structure of the valve needle, will be described below.

As shown in fig. 3, the needle 4 has a conducting screw 47 and a sub-needle 48 connected to the conducting screw, the conducting screw 47 being fixedly connected to the fixed seat 32 (for example, laser welded together at W), and the outer surface being provided with an external thread, being screwed with the guide 5, the sub-needle 48 being provided in the guide bush 6, the conducting screw passing through the sub-needle 48 and being connected to the sub-needle 48.

A second spring 49 is provided between the conductive screw 47 and the sub-valve needle 48, the second spring 49 being in a compressed state in the valve closing position, as shown in fig. 3, to achieve an elastic seal. Specifically, when the conducting screw 47 and the sub-valve needle 48 move downwards in the axial direction to the valve closing position, the sub-valve needle 48 seals the valve port a, at this time, the conducting screw 47 can move downwards continuously under the action of the magnetic rotor, so that the second spring 49 is compressed, the elastic contact between the sub-valve needle and the valve port is increased, and the sealing performance is provided. The conductive screw 47 has a first stepped portion 471, the sub-needle 48 has a first corresponding stepped portion 481, and the second spring is disposed between the first stepped portion and the first corresponding stepped portion.

In addition to this, the portion of the conductive lead screw 47 extending through the sub-needle forms a second step (in this example in the form of a fixed sleeve 472 which is fitted over the conductive lead screw), the sub-needle 48 having a second corresponding step 482, the resilient gasket 49' being arranged between the second step 472 and the second corresponding step 482, the resilient gasket being in a compressed state in the closed valve position. The function of the resilient pad is substantially the same as that of the second spring 49 and will not be described in detail.

In this embodiment, the sealing ring 7 is arranged between the sub-valve needle 48 and the guide sleeve 6.

Similar to the first embodiment, a gap (which is not shown in the drawings due to its relatively small size and which may be referred to as the first gap or the second gap of the first embodiment) is formed between the sub-needle 48 and the guide sleeve 6, and the sub-needle 48 has a first opening 483, which first opening 483 is in fluid communication with the gap and the valve port. The guide has a second aperture 54 (see, e.g., the first embodiment) in fluid communication with the gap and the space within the housing, such that the first aperture, the gap, the second aperture, and the space within the housing are in fluid communication. In this connection, reference can be made to the first embodiment for the purpose of making the upper and lower chamber pressures the same, facilitating the valve closing and opening operations.

Through the valve closing mechanism, valve closing operation is realized through electromagnetic force, the need of disassembling the safety helmet is eliminated, and no external leakage point exists; the pressure of the upper cavity and the lower cavity of the stop valve is the same through the design of the balance hole, so that the valve opening or closing operation is more labor-saving; by the arrangement of the first spring and the sealing ring, self-locking force can be provided for the rotating part (the magnetic rotor and the like), so that valve opening or valve closing actions caused by the rotation of the rotating part due to unexpected vibration are prevented; by the arrangement of the second spring, the valve is compressed at the closed position, and elastic sealing is realized.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (16)

1. A valve closing mechanism for a shut-off valve, the valve closing mechanism being configured to be mountable to the shut-off valve to switch the shut-off valve from an open valve state to a closed valve state, the valve closing mechanism comprising:

a cover configured to be sealably mounted to a valve seat of the shut-off valve;

a magnetic rotor rotatably mounted in the housing and rotatable therein under the influence of external magnetic force, the magnetic rotor being configured to be fixedly connected to a valve needle of the shut-off valve,

wherein, when the magnetic rotor rotates under the action of external magnetic force with the valve closing mechanism mounted to the shut-off valve, the valve needle is configured to be rotatable with the magnetic rotor and movable in the axial direction, thereby moving the valve needle from the open valve position to the valve closing position.

2. The valve-closing mechanism of claim 1, further comprising a guide fixedly disposed within the housing having an opening through which the valve needle passes, at least a portion of an inner surface of the opening being provided with internal threads to mate with external threads of at least a portion of an outer surface of the valve needle, the valve needle being configured to move in an axial direction relative to the guide while rotating within the guide when the magnetic rotor is rotated by external magnetic force, thereby moving the valve needle from the open valve position to the closed valve position.

3. The valve closing mechanism of claim 2, wherein the magnetic rotor includes a magnetic ring circumferentially disposed within the housing and a fixed seat secured to the valve needle, the magnetic ring being secured to the fixed seat.

4. The valve closing mechanism of claim 2, further comprising a spring support disposed inside the magnetic ring and a first spring disposed between the spring support and the guide.

5. A valve closing mechanism according to any one of claims 2 to 4, wherein the opening of the guide comprises a first opening portion and a second opening portion, the inner surface of the first opening portion being provided with an internal thread, the inner surface of the second opening portion being a smooth surface, the first opening portion being of smaller size than the second opening portion such that a step is formed between the first opening portion and the second opening portion, the valve needle having a first section and a second section, the first section being of smaller size than the second section such that a corresponding step is formed between the first section and the second section, the corresponding step of the valve needle abutting the step between the first portion and the second portion in the valve closing position.

6. A shut-off valve comprising a shut-off mechanism as claimed in any one of claims 1 to 5.

7. The shut-off valve of claim 6 further comprising a guide sleeve disposed within the valve seat and fixedly mounted to the guide member, the guide sleeve having another opening through which the valve needle passes.

8. The shut-off valve of claim 7, further comprising a third section, a portion of the second section and the third section passing through the other opening of the guide sleeve, the second section having a size smaller than the size of the third section such that a first gap is formed between the second section and the guide sleeve, a portion of the third section being provided with a first aperture, and the portion of the third section being provided with the first aperture having a size smaller than the size of the other opening such that a second gap is formed between the portion of the third section provided with the first aperture and the guide sleeve, in a valve-closing position the first aperture being in fluid communication with the valve port, the first gap, and the second gap, in a valve-opening position the first aperture being in fluid communication with the valve port and the second gap, the guide having a second aperture in fluid communication with the first gap and the space within the housing, in a valve-opening position the second aperture being in fluid communication with the second gap and the space within the housing.

9. The shut-off valve of claim 8 further comprising a seal disposed between the third section of the valve needle and the guide sleeve.

10. The shut-off valve of claim 8 wherein the valve needle comprises a conductive lead screw fixedly mounted to the fixed seat and having external threads on an outer surface thereof threadably coupled to the guide member via internal threads of the opening of the guide member and a sub-valve needle disposed within the guide sleeve and through which the conductive lead screw passes for coupling with the sub-valve needle.

11. The shut-off valve of claim 10 wherein the conductive lead screw has a first stepped portion and the sub-valve needle has a first corresponding stepped portion, the second spring being disposed between the first stepped portion and the first corresponding stepped portion, the second spring being in a compressed state in the closed valve position.

12. The shut-off valve of claim 11 wherein the conductive lead screw has a second stepped portion and the sub-valve needle has a second corresponding stepped portion, the resilient gasket being disposed between the second stepped portion and the second corresponding stepped portion, the resilient gasket being in a compressed state in the closed valve position.

13. The shut-off valve according to claim 12 wherein the outer portion of the conductive screw extending through the sub-valve needle is provided with a retaining sleeve forming a second corresponding step.

14. The shut-off valve of claim 10 wherein a seal is disposed between the sub-valve needle and the guide sleeve.

15. The shut-off valve of claim 10 wherein a gap is formed between the sub-valve needle and the guide sleeve, the sub-valve needle having a first bore in fluid communication with the gap and the valve port, the guide having a second bore in fluid communication with the gap and the space within the housing, such that the first bore, the gap, the second bore, and the space within the housing are in fluid communication.

16. An air conditioner comprising the shut-off valve according to any one of claims 6 to 15.