Valve element assembly, plug valve and gas stove

Abstract

The utility model discloses a valve element assembly, a plug valve and a gas stove, and relates to the technical field of gas stove safety, the valve element assembly comprises a valve element and a valve needle assembly, and a mounting hole penetrating through the two ends of the valve element is formed in the valve element; the valve needle assembly comprises a valve needle, a spring and a gasket which are all arranged in the mounting hole, the spring is arranged on the periphery of the valve needle in a sleeving mode and located between the valve needle and the valve element to provide elastic reset force for the valve needle, the gasket is arranged at one end of the spring, and an assembling structure is arranged between the gasket and the spring; wherein a sealing ring is arranged in the mounting hole, the sealing ring is arranged between the valve needle and the hole wall of the mounting hole so as to seal the valve needle and the mounting hole, the gasket abuts against the sealing ring, the gasket and the spring are assembled and fixed together through the assembling structure, and when the valve element assembly is assembled into the mounting hole of the valve element, the gasket is not prone to falling off, and the sealing ring can bear effective pressing force; the sealing ring is prevented from being separated from the mounting hole in the up-and-down movement process of the valve needle, and potential safety hazards caused by air leakage are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of gas stove safety, in particular to a valve core component, a plug valve and a gas stove. Background Art

[0002] The plug valve is a control valve for the gas flow of a gas stove. Generally, the valve core assembly in the plug valve is composed of a valve core, a sealing ring, a spring, a valve needle and a flat gasket. The sealing ring is arranged in the valve core groove of the valve core. In the prior art, the spring structure is generally a tower spring structure, which is small at the top and large at the bottom. A flat gasket is placed between the valve core spring and the sealing ring, so that the compression force of the spring can act on the sealing ring, so that the sealing ring is always pressed in the valve core groove during the up and down movement of the valve needle.

[0003] During the manufacturing process, the valve core, spring and flat gasket need to be pre-installed outside the inline body. When the pre-installed valve core assembly is transferred to the valve core groove, the flat gasket is easy to fall off the valve needle. Therefore, the sealing ring cannot be subjected to effective clamping force. The sealing ring may fall out of the valve core groove during the up and down movement of the valve needle, causing air leakage, posing a great hidden danger to user safety. Utility Model Content

[0004] The main purpose of the utility model is to provide a valve core assembly, a plug valve and a gas stove, aiming to solve the problem that the sealing ring of the existing valve core assembly may be separated from the valve core groove during the up and down movement of the valve needle, resulting in air leakage.

[0005] In order to achieve the above-mentioned purpose, the valve core assembly proposed in the utility model comprises:

[0006] A valve core having mounting holes formed therein and penetrating through both ends thereof; and

[0007] A valve needle assembly, comprising a valve needle, a spring and a gasket, all of which are arranged in the mounting hole, wherein the spring is sleeved around the periphery of the valve needle and is located between the valve needle and the valve core to provide elastic restoring force for the valve needle, and the gasket is arranged at one end of the spring, and a combination structure is provided between the gasket and the spring;

[0008] Wherein, a sealing ring is arranged in the mounting hole, and the sealing ring is arranged between the valve needle and the hole wall of the mounting hole to seal the two, and the gasket abuts against the sealing ring.

[0009] In one embodiment, the assembly structure includes a snap-fit ​​portion disposed on the gasket.

[0010] In one embodiment, a plurality of the engaging portions are provided, and the plurality of the engaging portions are arranged at intervals along the circumference of the gasket.

[0011] In one embodiment, a plurality of limiting arms are provided at intervals along the circumference of the gasket on one side facing the spring, and the engaging portion is defined between each of the limiting arms and the gasket.

[0012] In one embodiment, each of the limiting arms is inclined toward the center direction of the gasket in a direction away from the gasket.

[0013] In one embodiment, the gasket is annular and sleeved around the periphery of the valve needle.

[0014] In one embodiment, an inner side wall of the mounting hole is formed with an annular step portion, and the annular step portion has an annular step surface facing one end of the mounting hole;

[0015] The sealing ring is supported on the annular step surface;

[0016] The gasket abuts against a side of the sealing ring facing away from the annular step surface.

[0017] In one embodiment, an outer circumference of the sealing ring is interference fit with an annular side surface adjacent to the annular step surface, and an inner circumference of the sealing ring is interference fit with the valve needle.

[0018] In one embodiment, the spring is arranged to expand outward in a direction close to the gasket;

[0019] The diameter of the coil section of the spring at one end away from the gasket is d1, and the diameter of the inner ring of the gasket is d2, wherein d1≤d2.

[0020] The utility model also provides a plug valve, the plug valve comprising:

[0021] a valve body having a valve cavity; and

[0022] A valve core assembly is disposed in the valve cavity, and the valve core assembly includes:

[0023] A valve core having mounting holes formed therein and penetrating through both ends thereof; and

[0024] A valve needle assembly, comprising a valve needle, a spring and a gasket, all of which are arranged in the mounting hole, wherein the spring is sleeved around the periphery of the valve needle and is located between the valve needle and the valve core to provide elastic restoring force for the valve needle, and the gasket is arranged at one end of the spring, and a combination structure is provided between the gasket and the spring;

[0025] Wherein, a sealing ring is arranged in the mounting hole, and the sealing ring is arranged between the valve needle and the hole wall of the mounting hole to seal the two, and the gasket abuts against the sealing ring.

[0026] The utility model also provides a gas stove, the gas stove comprises a plug valve, the plug valve comprises:

[0027] a valve body having a valve cavity; and

[0028] A valve core assembly is disposed in the valve cavity, and the valve core assembly includes:

[0029] A valve core having mounting holes formed therein and penetrating through both ends thereof; and

[0030] A valve needle assembly, comprising a valve needle, a spring and a gasket, all of which are arranged in the mounting hole, wherein the spring is sleeved around the periphery of the valve needle and is located between the valve needle and the valve core to provide elastic restoring force for the valve needle, and the gasket is arranged at one end of the spring, and a combination structure is provided between the gasket and the spring;

[0031] Wherein, a sealing ring is arranged in the mounting hole, and the sealing ring is arranged between the valve needle and the hole wall of the mounting hole to seal the two, and the gasket abuts against the sealing ring.

[0032] In the technical solution of the utility model, a connecting structure is provided between the gasket and the spring, and the gasket and the spring are connected and fixed together by the connecting structure. When the valve core assembly is assembled into the mounting hole of the valve core, the gasket is not easy to fall off, and the gasket can abut against the sealing ring, and the sealing ring can be subjected to effective clamping force, thereby preventing the sealing ring from being separated from the mounting hole during the up and down movement of the valve needle, thereby preventing safety hazards caused by air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 A schematic structural diagram of an embodiment of a plug valve provided by the utility model;

[0035] Figure 2 for Figure 1 Cross-sectional view of AA in the middle;

[0036] Figure 3 for Figure 2 A partial enlarged view of point B in the middle;

[0037] Figure 4 A structural schematic diagram of an embodiment of a valve core assembly provided by the utility model;

[0038] Figure 5 for Figure 4 A schematic diagram of the structure of the valve needle assembly;

[0039] Figure 6 for Figure 5 Schematic diagram of the middle gasket and assembly structure;

[0040] Figure 7 Schematic diagram of a valve needle assembly in the related art.

[0041] Description of Figure Numbers:

[0042] 100, valve core assembly; 1, valve core; a, mounting hole; b, flow hole; 11, annular step surface; 12, annular side surface; 10, valve needle assembly; 2, valve needle; 3, spring; 4, gasket; 41, assembly structure; 411, limit arm; 5, sealing ring;

[0043] 200. Plug valve; 6. Valve body; 6a. Valve chamber; 6b. Installation channel; 7. Lever.

[0044] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0048] The plug valve is a control valve for the gas flow of a gas stove. Generally, the valve core assembly in the plug valve is composed of a valve core, a sealing ring, a spring, a valve needle and a flat gasket. The sealing ring is arranged in the valve core groove of the valve core. In the prior art, the spring structure is generally a tower spring structure, which is small at the top and large at the bottom. A flat gasket is placed between the valve core spring and the sealing ring, so that the compression force of the spring can act on the sealing ring, so that the sealing ring is always compressed in the valve core groove during the up and down movement of the valve needle. During the manufacturing process, the valve core, spring and flat gasket need to be pre-installed outside the line. When the pre-installed valve core assembly is transferred to the valve core groove, the flat gasket is easy to fall off from the valve needle. Therefore, the sealing ring cannot be subjected to effective compression force. The sealing ring may be separated from the valve core groove during the up and down movement of the valve needle, causing air leakage, which poses a great hidden danger to user safety.

[0049] The utility model provides a valve core component, a plug valve and a gas stove to solve the problem that the sealing ring of the existing valve core component may be separated from the valve core groove and cause gas leakage during the up and down movement of the valve needle.

[0050] See also Figures 3 to 5 In one embodiment of the utility model, the valve core assembly 100 includes a valve core 1 and a valve needle assembly 10, the interior of the valve core 1 is formed with a mounting hole a passing through both ends thereof; the valve needle assembly 10 includes a valve needle 2, a spring 3 and a gasket 4 all arranged in the mounting hole a, the spring 3 is sleeved on the periphery of the valve needle 2 and is located between the valve needle 2 and the valve core 1 to provide elastic restoring force for the valve needle 2, the gasket 4 is arranged at one end of the spring 3, and a connecting structure 41 is arranged between the gasket 4 and the spring 3; wherein a sealing ring 5 is arranged in the mounting hole a, the sealing ring 5 is arranged between the valve needle 2 and the hole wall of the mounting hole a to seal the two, and the gasket 4 abuts against the sealing ring 5.

[0051] It should be noted that in the related art, please refer to Figures 1 to 3 The plug valve 200 is a valve used to adjust the gas flow rate. The valve core assembly 100 is installed in the valve cavity 6a. The valve cavity 6a is provided with an air inlet and an air outlet. The valve cavity 6a is also provided with a lever 7 for opening and closing the air inlet. When the valve core assembly 100 moves downward, the valve needle 2 resists the lever 7 and rotates. The lever 7 opens the solenoid valve, so that the gas can flow from the air inlet to the valve core 1. The valve core 1 is provided with a plurality of flow holes b for connecting the air inlet and the air outlet. When the valve core 1 is rotated, the connection area between the flow holes b and the air inlet and the air outlet can be adjusted, thereby realizing the flow control. In order to drive the valve needle 2 to move up and down, an installation channel 6b connected to the valve cavity 6a is opened on the valve body 6. The valve stem is inserted into the installation channel 6b and abuts against the valve needle 2 located in the valve core 1. When the user operates the valve stem, the valve needle 2 can be driven to move up and down, and the valve core 1 can also be driven to rotate. Since the installation passage 6b is in communication with the valve cavity 6a and the outside, the sealing between the valve needle 2 and the valve core 1 is particularly important, so a sealing gasket is provided between the installation hole a and the valve needle 2 .

[0052] In order to ensure that the resetting force of the spring 3 can provide resetting while also generating pressure on the sealing gasket, so as to prevent the valve needle 2 from moving upward and driving the sealing ring 5 to move upward and separate from the hole wall of the mounting hole a, the resetting force of the spring 3 is transmitted to the sealing ring 5 through the gasket 4, so that the sealing gasket can always be arranged between the hole wall of the mounting hole a and the valve needle 2 to maintain a good sealing effect. Therefore, the gasket 4 is one of the important factors affecting the safety of the plug valve 200.

[0053] In the technical solution of the utility model, an assembly structure 41 is provided between the gasket 4 and the spring 3, and the gasket 4 and the spring 3 are assembled and fixed together by the assembly structure 41. When assembled into the mounting hole a of the valve core 1, the gasket 4 is not easy to fall off, and the gasket 4 can abut against the sealing ring 5. The sealing ring 5 can be subjected to effective clamping force, thereby preventing the sealing ring 5 from being separated from the mounting hole a during the up and down movement of the valve needle 2, thereby preventing safety hazards caused by air leakage.

[0054] Specifically, in this embodiment, the assembly structure 41 includes a clamping portion provided on the gasket 4. By providing the clamping portion, the coil section at the bottom of the spring 3 can be clamped and fixed. When pre-assembling, it is only necessary to clamp the spring 3 and the gasket 4, which is simple to assemble.

[0055] It should be noted that the engaging portion may be a structure such as a slot or a hook, and may of course be arranged in other possible forms, which may be determined based on actual conditions, and the embodiments of this specification do not limit this.

[0056] In another embodiment, the assembly structure 41 may also fix the spring 3 and the gasket 4 by providing an adhesive layer.

[0057] In another embodiment, the assembly structure 41 may also be configured by setting a screw connection structure or a riveted connection structure to achieve the fixing of the spring 3 and the gasket 4 .

[0058] Of course, the assembly structure 41 is not limited to the above examples. Technical personnel in the relevant field may make other changes based on the technical essence of the embodiments of this specification. However, as long as the functions and effects achieved are the same or similar to those of the embodiments of this specification, they should be included in the protection scope of the embodiments of this specification.

[0059] In this embodiment, the clamping parts are provided in plurality, and the clamping parts are arranged at intervals along the circumference of the gasket 4. Since the bottom of the spring 3 is provided in a circular ring, the clamping parts can clamp and fix the spring 3 at multiple locations in the circumference, so that the gasket 4 can be fixed to the spring 3 more stably.

[0060] Specifically, see Figure 5 and Figure 6 In this embodiment, a plurality of limiting arms 411 are arranged at intervals along the circumference of the gasket 4 on one side facing the spring 3, and the clamping portion is defined between each of the limiting arms 411 and the gasket 4. In this way, the spring 3 is clamped between the plurality of limiting arms 411, and the structure is relatively simple to manufacture and the assembly form is also simple.

[0061] Furthermore, in this embodiment, each of the limiting arms 411 is inclined toward the center of the gasket 4 in the direction away from the gasket 4. In this way, a slot with a notch toward the center of the gasket 4 is formed between the limiting arms 411 and the gasket 4. During assembly, the spring 3 can be clamped in the plurality of slots by utilizing the elasticity of the spring 3. After the installation is completed, the plurality of limiting arms 411 can limit the spring 3 when it moves in the upward direction.

[0062] Furthermore, in this embodiment, the gasket 4 is annularly arranged and sleeved on the periphery of the valve needle 2. In this way, when the gasket 4 is sleeved on the periphery of the valve needle 2, the gasket 4 can provide a relatively balanced force-bearing area in the middle area between the spring 3 and the sealing ring 5. When the restoring force of the spring 3 acts on the gasket 4, the gasket 4 and the sealing gasket are equally stressed in the circumferential direction, thereby preventing the sealing ring 5 from tilting due to uneven stress.

[0063] In this example, see Figure 3The inner side wall of the mounting hole a is formed with an annular step portion, and the annular step portion has an annular step surface 11 facing one end of the mounting hole a; the sealing ring 5 is supported on the annular step surface 11; and the gasket 4 abuts against the side of the sealing ring 5 facing away from the annular step surface 11. In this way, the sealing ring 5 is arranged at the annular step portion, so that the sealing ring 5 can be limited there, and the displacement of the sealing ring 5 in the horizontal direction is avoided.

[0064] It can be understood that in order to enable the gasket 4 to fully interact with the sealing ring 5, the depth of the annular step surface 11 is set to be smaller than the thickness of the sealing ring 5. In this way, when the spring 3 presses against the gasket 4, the gasket 4 and the portion of the sealing ring 5 protruding from the annular step surface 11 are squeezed, so that the sealing ring 5 can be pressed between the annular step surface 11 and the gasket 4 to avoid air leakage.

[0065] In this embodiment, the outer circumference of the sealing ring 5 is in interference fit with the annular side surface 12 adjacent to the annular step surface 11, and the inner circumference of the sealing ring 5 is in interference fit with the valve needle 2. In this way, the outer circumference of the sealing ring 5 and the annular side surface 12 can be sealed, and the inner circumference of the sealing ring 5 and the valve needle 2 can be sealed, thereby avoiding gas leakage caused by the assembly gap between the valve needle 2 and the hole wall of the mounting hole a.

[0066] In this embodiment, the spring 3 is arranged to expand outward in the direction close to the gasket 4; the diameter of the coil section of the spring 3 at one end away from the gasket 4 is d1, and the diameter of the inner ring of the gasket 4 is d2, wherein d1≤d2. Of course, in order to ensure that the valve needle 2 slides smoothly during the movement, the spring 3 and the valve needle 2 are arranged to be clearance-fitted, and the valve needle 2 and the gasket 4 are also arranged to be clearance-fitted.

[0067] When the valve needle 2 is inserted into the spring 3 and the gasket 4, since the valve needle 2 is inserted from the top of the spring 3 toward the center of the gasket 4, when the diameter of the inner ring of the gasket 4 is set to be greater than or equal to the diameter of the coil segment, it is convenient for assembly and operation.

[0068] It can be understood that the center line of the spring 3 and the center line of the gasket 4 are arranged to coincide with each other. In this way, when the valve needle 2 is sleeved on the gasket 4 and the spring 3, the coil segment and the inner ring of the gasket 4 provide a guiding effect when the valve needle 2 moves, thereby preventing the valve needle 2 from swinging when it moves up and down, so that the force is uniform when the lever 7 is pressed to open the solenoid valve, and the valve opening stroke is stable.

[0069] The utility model also provides a plug valve 200, which includes a valve body 6 and a valve core assembly 100, wherein the valve body 6 has a valve cavity 6a; the valve core assembly 100 is arranged in the valve cavity 6a, and the specific structure of the valve core assembly 100 refers to the above-mentioned embodiment. Since the plug valve 200 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0070] The utility model also proposes a gas stove, which includes a stove and a stopcock 200. The specific structure of the stopcock 200 refers to the above embodiment. Since the gas stove adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0071] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A valve core assembly, characterized in that: include: A valve core having mounting holes formed therein and penetrating through both ends thereof; and A valve needle assembly, comprising a valve needle, a spring and a gasket, all of which are arranged in the mounting hole, wherein the spring is sleeved around the periphery of the valve needle and is located between the valve needle and the valve core to provide elastic restoring force for the valve needle, and the gasket is arranged at one end of the spring, and a combination structure is provided between the gasket and the spring; Wherein, a sealing ring is arranged in the mounting hole, and the sealing ring is arranged between the valve needle and the hole wall of the mounting hole to seal the two, and the gasket abuts against the sealing ring.

2. The valve core assembly according to claim 1, characterized in that: The assembly structure includes a clamping portion arranged on the gasket.

3. The valve core assembly according to claim 2, characterized in that: A plurality of the engaging portions are provided, and the plurality of the engaging portions are arranged at intervals along the circumferential direction of the gasket.

4. The valve core assembly according to claim 3, characterized in that: A plurality of limiting arms are arranged at intervals along the circumference of the gasket on one side facing the spring, and the clamping portion is defined between each of the limiting arms and the gasket.

5. The valve core assembly according to claim 4, characterized in that: Each of the limiting arms is inclined toward the center direction of the gasket in a direction away from the gasket.

6. The valve core assembly according to claim 1, characterized in that: The gasket is arranged in an annular shape and is sleeved on the periphery of the valve needle.

7. The valve core assembly according to any one of claims 1 to 6, characterized in that: An annular step portion is formed on the inner side wall of the mounting hole, and the annular step portion has an annular step surface facing one end of the mounting hole; The sealing ring is supported on the annular step surface; The gasket abuts against a side of the sealing ring facing away from the annular step surface.

8. The valve core assembly according to claim 7, characterized in that: An outer peripheral edge of the sealing ring is in interference fit with an annular side surface adjacent to the annular step surface, and an inner peripheral edge of the sealing ring is in interference fit with the valve needle.

9. The valve core assembly according to claim 6, characterized in that: The spring is arranged to expand outward in a direction close to the gasket; The diameter of the coil section of the spring at one end away from the gasket is d1, and the diameter of the inner ring of the gasket is d2, wherein d1≤d2.

10. A plug valve, characterized in that: include: A valve body having a valve cavity; as well as, The valve core assembly according to any one of claims 1 to 9 is arranged in the valve cavity.

11. A gas stove, characterized in that: Comprising the plug valve as claimed in claim 10.

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