Sealing structure for water quantity servo device and water quantity servo device comprising same

Abstract

The utility model provides a sealing structure for a water quantity servo device and the water quantity servo device comprising the sealing structure, and belongs to the technical field of water quantity adjusting devices. The sealing structure for the water quantity servo device is arranged between a valve body of the water quantity servo device and a communicating pipe of a pipe body. The valve body is connected with the communicating pipe in the axial direction of the communicating pipe, the sealing structure comprises a leather film, and the leather film is arranged between the communicating pipe and the valve body in a sealed mode. A guide piece for guiding the valve element to move is arranged in the valve body, one end of the guide piece extends into the communicating pipe and is provided with a connecting part, and the connecting part directly faces the inner circumferential wall of the communicating pipe; the sealing structure further comprises a radial sealing piece which is connected between the connecting part and the inner circumferential wall of the communicating pipe in a sealed mode. Therefore, the communicating pipe is sealed by the radial sealing piece in the radial direction, even if water flow leaks due to failure of the leather film due to various reasons, the radial sealing piece also forms a sealing defensive line to prevent the water flow from flowing out, and the water quantity servo device has multiple sealing defensive lines, so that the leakage-proof effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of water volume regulating devices, in particular to a sealing structure for a water volume servo device and a water volume servo device comprising the same. Background Art

[0002] When the water heater is in a state of low water inlet temperature or large water flow, the outlet water temperature will not reach the temperature set by the user, affecting the user's comfort in bathing and water use. In the prior art, water servo devices are often used to stabilize the outlet water temperature by controlling and adjusting the water flow. However, in the existing water servo devices, the connecting pipe between the valve body and the pipe body is mostly sealed axially with a membrane. If the membrane is not installed properly or is blocked by impurities and sand, the water may flow out from the gap created by the membrane, causing a certain risk of water leakage in the water servo device, thereby affecting the safety performance of the water heater installed with the water servo device. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the water volume servo device in the prior art that the sealing structure is single and there is a risk of water leakage, and to provide a sealing structure for a water volume servo device and a water volume servo device containing the same.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A sealing structure for a water quantity servo device, which is arranged between a valve body of the water quantity servo device and a connecting pipe of a pipe body; the valve body is connected to the connecting pipe along the axial direction of the connecting pipe, and the sealing structure comprises a membrane, and the membrane seal is arranged between the connecting pipe and the valve body;

[0006] The valve body is provided with a guide member for guiding the movement of the valve core, and one end of the guide member extends into the connecting tube; the end of the guide member extending into the connecting tube is provided with a connecting portion, and the connecting portion is opposite to the inner circumferential wall of the connecting tube; the sealing structure also includes a radial seal, and the radial seal is sealingly connected between the connecting portion and the inner circumferential wall of the connecting tube.

[0007] In the present solution, the guide member is extended to extend into the connecting pipe and a connecting portion facing the inner circumferential wall of the connecting pipe is provided at the end of the guide member, and a radial seal is sealed between the connecting portion and the inner circumferential wall of the connecting pipe, so that the connecting pipe is sealed by the radial seal in the radial direction. Even if the membrane fails for various reasons and water leaks out, the radial seal forms another sealing line of defense to prevent water from flowing out of the water volume servo device. As a result, the water volume servo device has multiple sealing lines of defense and a better leakage prevention effect.

[0008] Preferably, along the circumferential direction of the connecting tube, the connecting portion is provided with a groove facing the inner circumferential wall of the connecting tube, and an accommodating space is formed between the groove and the inner circumferential wall of the connecting tube; the radial seal is arranged in the accommodating space and has an interference fit with the accommodating space.

[0009] In this solution, a groove is provided on the inner peripheral wall of the connecting portion toward the connecting pipe, providing a mounting base for the radial seal, and the design of the groove can limit the radial seal to prevent the radial seal from moving and falling off. In addition, the radial seal is interference-fitted with the accommodating space, and the radial seal produces compression deformation, forming a simple and efficient sealing defense line.

[0010] Preferably, a first concave cavity is provided on a side of the connecting portion away from the connecting pipe.

[0011] In this solution, the provision of the first cavity makes the connecting portion thinner, saves materials, and makes the structural thickness of the connecting portion uniform, which is easy to manufacture.

[0012] Preferably, the valve body is further provided with a bottom plate at one end facing the connecting pipe, and the bottom plate cover is arranged on the connecting pipe; the sealing structure also includes a pre-tightening member, and the two ends of the pre-tightening member are respectively connected to the bottom plate and the side of the connecting portion away from the connecting pipe.

[0013] In this solution, a preload member is arranged between the bottom plate and the connecting part of the valve body. When the valve body and the guide member are assembled, the preload member will generate a certain preload force to tighten the valve body and the guide member in the axial direction of the connecting pipe, thereby adding an axial sealing line of defense to the water volume servo device, thereby improving the sealing effect.

[0014] Preferably, the preload member is a spring; a first concave cavity is provided on a side of the connecting portion away from the connecting pipe, and the spring is arranged in the first concave cavity.

[0015] In this solution, the spring as a preload member has a simple structure and excellent effect; a first concave cavity is set on the side of the connection part away from the connecting pipe, leaving installation space for the spring; and the setting of the first concave cavity eliminates the problem that the connection part is too far from the bottom plate and requires a large installation length when installing the spring, making the structure of the water volume servo device more compact. In addition, the spring also makes the force between the valve body and the guide more uniform, and can also avoid the size difference problem of guide parts in different batches during production, and improve the reliability of the overall sealing effect.

[0016] Preferably, a plurality of reinforcing ribs are provided in the first cavity.

[0017] In this solution, the provision of the first cavity makes the connecting portion thinner, and a plurality of reinforcing ribs are provided in the first cavity to ensure the overall strength of the connecting portion or the guide member.

[0018] Preferably, a connecting surface is provided on the radial outer side of the connecting pipe, and the bottom plate is connected to the connecting surface by screws.

[0019] In this solution, the bottom plate is connected to the connection surface, and an axial seal is formed between the valve body and the connecting pipe; the bottom plate and the connection surface are connected by screws, which facilitates the disassembly, replacement and maintenance of the valve body and the connecting pipe.

[0020] Preferably, an abutment portion is provided at one end of the connecting tube away from the guide member, and the abutment portion has an abutment surface extending a predetermined distance along the radial direction of the connecting tube; in the axial direction of the connecting tube, the membrane is pressed between one end of the connecting portion facing the connecting tube and the abutment surface.

[0021] In this solution, the connecting portion of the guide piece is fully utilized to extend into the connecting pipe, and the membrane is pressed between the connecting portion and the abutting portion. There is no need to set up a clamping structure for the installation of the membrane, which makes the layout in the connecting pipe more reasonable and the space more compact.

[0022] Preferably, a first groove is provided on the side of the membrane facing the abutting portion, and a second groove is provided on the side of the membrane facing the connecting portion; a protrusion is provided on one end of the connecting portion facing the connecting tube; the abutting portion abuts in the first groove, and the protrusion abuts in the second groove.

[0023] In this solution, by providing the first groove and the second groove on both sides of the membrane, the membrane can respectively abut against the protrusions on the abutting portion and the connecting portion to form an axial seal for the connecting pipe.

[0024] A water volume servo device comprises the sealing structure for the water volume servo device as described above; the water volume servo device also comprises a valve seat plate, the valve seat plate is arranged in the connecting pipe, and the valve seat plate is provided with a through hole facing the valve core; the connecting portion is provided with a second concave cavity on the side facing the connecting pipe, and the valve seat plate is at least partially arranged in the second concave cavity along the axial direction of the connecting pipe.

[0025] In the present solution, the valve core moves in the guide member and can extend out of the guide member to open or close the through hole on the valve seat disk, so the valve seat disk and the guide member should be spaced a predetermined distance apart; and by providing a second concave cavity on the side of the connecting portion facing the connecting pipe, the valve seat disk is at least partially provided in the second concave cavity, which to a certain extent alleviates the problem of the guide member being too long in the axial direction of the connecting pipe due to the provision of the connecting portion, and makes the structure of the water volume servo device as compact as possible and maintains a suitable structural size.

[0026] The positive and progressive effects of the utility model are:

[0027] In the utility model, the extended guide member is extended into the connecting pipe and a connecting portion facing the inner circumferential wall of the connecting pipe is provided at the end of the guide member, and a radial seal is sealed between the connecting portion and the inner circumferential wall of the connecting pipe, so that the connecting pipe is sealed by the radial seal in the radial direction. Even if the membrane fails for various reasons and water leaks out, the radial seal forms another sealing line of defense to prevent water from flowing out of the water volume servo device. As a result, the water volume servo device has multiple sealing lines of defense and a better leakage prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural schematic diagram of a water volume servo device according to a preferred embodiment of the utility model.

[0029] Figure 2 It is a cross-sectional structural diagram of a water volume servo device according to a preferred embodiment of the utility model.

[0030] Figure 3 for Figure 2 A detailed enlarged schematic diagram of part A.

[0031] Figure 4 This is a schematic diagram of the three-dimensional structure of a guide member according to a preferred embodiment of the utility model (I).

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the guide member of the preferred embodiment of the utility model (II).

[0033] Figure 6 It is a schematic diagram of the three-dimensional structure of the membrane of a preferred embodiment of the utility model.

[0034] Figure 7 The cross-sectional structure diagram of the membrane of a preferred embodiment of the utility model is shown in FIG.

[0035] Description of reference numerals:

[0036] Valve body 100

[0037] Valve core 110

[0038] Guide 200

[0039] Ontology 210

[0040] Connecting part 220

[0041] Groove 221

[0042] The first concave cavity 222

[0043] Reinforcement 223

[0044] Bump 224

[0045] Second concave cavity 225

[0046] Base plate 300

[0047] Tube body 400

[0048] Water Inlet 410

[0049] Water outlet 420

[0050] Connecting pipe 430

[0051] Connection surface 440

[0052] Contact part 450

[0053] Abutment surface 451

[0054] Skin film 500

[0055] First groove 510

[0056] Second groove 520

[0057] Radial seal 600

[0058] Preload 700

[0059] Valve seat disc 800

[0060] Through hole 810

[0061] Axial direction X

[0062] Radial direction Y DETAILED DESCRIPTION

[0063] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0064] like Figure 1-Figure 7 As shown, this embodiment provides a water volume servo device, which includes a valve body 100 and a pipe body 400. The pipe body 400 has a water inlet 410, a water outlet 420 and a connecting pipe 430, and the valve body 100 is connected to the connecting pipe 430 along the axial direction X of the connecting pipe 430. A valve core 110 is provided in the valve body 100, and a valve seat plate 800 is provided in the connecting pipe 430. A through hole 810 facing the valve core 110 is opened on the valve seat plate 800, and the valve core 110 can extend from the valve body 100 into the connecting pipe 430 and open or close the through hole 810.

[0065] The movement principle of the valve core 110 and the principle of the water flow servo device regulating the flow rate belong to the prior art and will not be described in detail.

[0066] The water quantity servo device further includes a sealing structure for the water quantity servo device, which is disposed between the valve body 100 and the connecting pipe 430 of the pipe body 400 .

[0067] The sealing structure includes a membrane 500 , and the membrane 500 is sealingly disposed between the connecting pipe 430 and the valve body 100 .

[0068] In addition, a guide member 200 is provided in the valve body 100 to guide the movement of the valve core 110, and one end of the guide member 200 extends into the connecting pipe 430; the end of the guide member 200 extending into the connecting pipe 430 is provided with a connecting portion 220, and the connecting portion 220 is opposite to the inner circumferential wall of the connecting pipe 430; the sealing structure also includes a radial seal 600, which is sealingly connected between the connecting portion 220 and the inner circumferential wall of the connecting pipe 430.

[0069] The membrane 500 is an axial seal between the connecting pipe 430 and the valve body 100. The guide member 200 is extended into the connecting pipe 430, and a connecting portion 220 facing the inner wall of the connecting pipe 430 is provided at the end of the guide member 200, and a radial seal 600 is sealed between the connecting portion 220 and the inner wall of the connecting pipe 430. The connecting pipe 430 is sealed by the radial seal 600 in the radial direction Y. Even if the membrane 500 fails for various reasons and water leaks out, the radial seal 600 forms another sealing line to prevent water from flowing out of the water servo device. As a result, the water servo device has multiple sealing lines and a better anti-leakage effect.

[0070] Specifically, along the circumferential direction of the connecting tube 430, the connecting portion 220 is provided with a groove 221 facing the inner circumferential wall of the connecting tube 430, and an accommodating space is formed between the groove 221 and the inner circumferential wall of the connecting tube 430; the radial seal 600 is arranged in the accommodating space and has an interference fit with the accommodating space.

[0071] A groove 221 is provided on the inner peripheral wall of the connecting portion 220 toward the connecting pipe 430 to provide an installation base for the radial seal 600 . The design of the groove 221 can limit the radial seal 600 and prevent the radial seal 600 from moving and falling off.

[0072] In this embodiment, the radial seal 600 is made of an elastic material such as rubber, and the radial seal 600 is interference fit with the accommodating space, and the radial seal 600 produces compression deformation, which can form a simple and efficient sealing defense line. In other optional embodiments, it is also possible to select a matching thread between the outer peripheral side of the connecting portion 220 and the inner peripheral wall of the connecting pipe 430 to achieve sealing.

[0073] Of course, the radial seal 600 in this embodiment is annular to form a comprehensive seal in the circumferential direction of the connecting pipe 430 .

[0074] Furthermore, a bottom plate 300 is provided at one end of the valve body 100 facing the connecting pipe 430, and the bottom plate 300 is covered on the connecting pipe 430; the sealing structure also includes a pre-tightening member 700, and the two ends of the pre-tightening member 700 are respectively connected to the bottom plate 300 and the side of the connecting part 220 away from the connecting pipe 430.

[0075] By arranging a preload member 700 between the bottom plate 300 and the connecting portion 220 of the valve body 100, when the valve body 100 and the guide member 200 are assembled, the preload member 700 will generate a certain preload force, thereby tightening the valve body 100 and the guide member 200 in the axial direction X of the connecting pipe 430, thereby adding an axial sealing line of defense to the water volume servo device, thereby improving the sealing effect.

[0076] In this embodiment, the preload member 700 is a spring; the connecting portion 220 is provided with a first concave cavity 222 on the side away from the connecting pipe 430, and the spring is arranged in the first concave cavity 222 (see Figure 3 and Figure 4 ).

[0077] The spring as the pre-tightening member 700 has a simple structure and excellent effect, and also makes the force between the valve body 100 and the guide member 200 more uniform, and can also avoid the size difference problem of the guide members 200 of different batches during production, and improve the reliability of the overall sealing effect. In other optional embodiments, the pre-tightening member 700 can also be set as an elastic bandage or other structure, which can generate a force to tighten the bottom plate 300 and the connecting part 220.

[0078] A first concave cavity 222 is provided on the side of the connecting portion 220 away from the connecting pipe 430, leaving installation space for the spring. The provision of the first concave cavity 222 eliminates the problem that the connecting portion 220 is too far from the bottom plate 300 and requires a larger installation length due to the installation of the preload member 700, thereby making the structure of the water volume servo device more compact. In addition, the provision of the first concave cavity 222 makes the connecting portion 220 thinner, saves materials, and can make the structural thickness of the connecting portion 220 tend to be uniform, which is convenient for manufacturing.

[0079] Furthermore, a plurality of reinforcing ribs 223 are provided in the first cavity 222. Since the provision of the first cavity 222 makes the connecting portion 220 thinner, the provision of a plurality of reinforcing ribs 223 in the first cavity 222 can ensure the overall structural strength of the connecting portion 220 or the guide member 200.

[0080] Furthermore, a connecting surface 440 is provided on the radial outer side of the connecting pipe 430 , and the bottom plate 300 is connected to the connecting surface 440 by screws.

[0081] The bottom plate 300 is connected to the connection surface 440 , and an axial seal is formed between the valve body 100 and the connecting pipe 430 ; the bottom plate 300 and the connection surface 440 are connected by screws, which facilitates the disassembly, replacement and maintenance of the valve body 100 and the connecting pipe 430 .

[0082] like Figure 3 As shown, an abutment portion 450 is provided at one end of the connecting tube 430 away from the guide member 200, and the abutment portion 450 has an abutment surface 451 extending a predetermined distance along the radial direction Y of the connecting tube 430; in the axial direction X of the connecting tube 430, the membrane 500 is pressed between one end of the connecting portion 220 facing the connecting tube 430 and the abutment surface 451.

[0083] This embodiment makes full use of the convenient condition that the connecting portion 220 of the guide member 200 has extended into the connecting pipe 430, and presses the membrane 500 between the connecting portion 220 and the abutting portion 450. There is no need to set up a clamping structure for the installation of the membrane 500, so that the layout in the connecting pipe 430 is more reasonable and the space is more compact.

[0084] Specifically, a first groove 510 is provided on the side of the membrane 500 facing the abutment portion 450, and a second groove 520 is provided on the side of the membrane 500 facing the connection portion 220; a protrusion 224 is provided on one end of the connection portion 220 facing the connecting tube 430; the abutment portion 450 abuts against the first groove 510, and the protrusion 224 abuts against the second groove 520.

[0085] Therefore, by providing the first groove 510 and the second groove 520 on both sides of the membrane 500 , the membrane 500 can respectively abut against the abutting portion 450 and the protrusion 224 on the connecting portion 220 to form an axial seal for the connecting pipe 430 .

[0086] like Figure 5-Figure 7 As shown, the membrane 500 in this embodiment is disc-shaped and is arranged in the connecting tube 430 along the radial direction Y of the connecting tube 430; and the first groove 510 and the second groove 520 are both annular, and the protrusion 224 and the abutment 450 on the connecting part 220 are also annular, so that in the circumferential direction of the connecting tube 430, both sides of the membrane 500 can be subjected to balanced force from the abutment 450 and the protrusion 224, ensuring that the membrane 500 is firmly installed.

[0087] In addition, if Figure 3 and Figure 5 As shown, a second cavity 225 is provided on one side of the connecting portion 220 facing the connecting pipe 430 , and the valve seat plate 800 is at least partially disposed in the second cavity 225 along the axial direction X of the connecting pipe 430 .

[0088] like Figure 2-Figure 5As shown, specifically, the guide member 200 in this embodiment includes a body 210 and a connecting portion 220, the body 210 is tubular, and the connecting portion 220 is connected to one end of the body 210 facing the connecting pipe. The valve core 110 moves in the body 210 of the guide member 200, and can extend from the body 210 toward one end of the connecting pipe to open or close the through hole 810 on the valve seat plate 800, so the valve seat plate 800 and the body 210 of the guide member 200 should be spaced apart by a predetermined distance; since the connecting portion 220 is provided at one end of the body 210 facing the connecting pipe, the length of the guide member 200 is undoubtedly increased, and the distance between the valve seat plate 800 and the guide member 200 is shortened. If the original distance between the valve seat plate 800 and the body 210 of the guide member 200 is to be maintained, the guide member 200 needs to be moved outward, which not only increases the length of the valve body 100, but also involves further changes to the structure of the water quantity servo device, which is very inconvenient. By setting a second cavity 225 on the side of the connecting portion 220 facing the connecting pipe 430, the valve seat plate 800 is at least partially set in the second cavity 225, which alleviates to a certain extent the problem that the guide member 200 is too long in the axial direction X of the connecting pipe 430 due to the setting of the connecting portion 220, and makes the structure of the water volume servo device as compact as possible and maintains appropriate structural dimensions.

[0089] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A sealing structure for a water quantity servo device, which is arranged between a valve body of the water quantity servo device and a connecting pipe of a pipe body; the valve body is connected to the connecting pipe along the axial direction of the connecting pipe, the sealing structure comprises a membrane, and the membrane seal is arranged between the connecting pipe and the valve body; It is characterized in that The valve body is provided with a guide member for guiding the movement of the valve core, and one end of the guide member extends into the connecting pipe; One end of the guide member extending into the connecting pipe is provided with a connecting portion, and the connecting portion is directly facing the inner peripheral wall of the connecting pipe; The sealing structure further includes a radial sealing member, which is sealingly connected between the connecting portion and the inner peripheral wall of the connecting pipe.

2. The sealing structure for a water quantity servo device according to claim 1, characterized in that: Along the circumferential direction of the connecting pipe, the connecting portion is provided with a groove facing the inner peripheral wall of the connecting pipe, and an accommodating space is formed between the groove and the inner peripheral wall of the connecting pipe; The radial sealing element is disposed in the accommodating space and is interference-fitted with the accommodating space.

3. The sealing structure for a water quantity servo device according to claim 1, characterized in that: A first concave cavity is provided on a side of the connecting portion away from the connecting pipe.

4. The sealing structure for a water quantity servo device according to claim 1, characterized in that: The end of the valve body facing the connecting pipe is also provided with a bottom plate, and the bottom plate cover is arranged on the connecting pipe; The sealing structure further comprises a pre-tightening member, two ends of which are respectively connected to the bottom plate and a side of the connecting portion away from the connecting pipe.

5. The sealing structure for a water quantity servo device according to claim 4, characterized in that: The preload member is a spring; A first concave cavity is provided on a side of the connecting portion away from the connecting pipe, and the spring is arranged in the first concave cavity.

6. The sealing structure for a water quantity servo device according to claim 3 or 5, characterized in that: A plurality of reinforcing ribs are arranged in the first cavity.

7. The sealing structure for a water quantity servo device according to claim 4, characterized in that: A connecting surface is provided on the radial outer side of the connecting pipe, and the bottom plate is connected to the connecting surface by screws.

8. The sealing structure for a water quantity servo device according to claim 1, characterized in that: An abutment portion is provided at one end of the connecting pipe away from the guide member, and the abutment portion has an abutment surface extending a predetermined distance in the radial direction of the connecting pipe; In the axial direction of the connecting pipe, the film is pressed between one end of the connecting portion facing the connecting pipe and the abutting surface.

9. The sealing structure for a water quantity servo device according to claim 8, characterized in that: A first groove is provided on the side of the membrane facing the abutting portion, and a second groove is provided on the side of the membrane facing the connecting portion; The connecting portion is provided with a protrusion at one end facing the connecting pipe; The abutting portion abuts against the first groove, and the protrusion abuts against the second groove.

10. A water volume servo device, characterized in that: The water quantity servo device comprises a sealing structure for a water quantity servo device as claimed in any one of claims 1 to 9; The water volume servo device further comprises a valve seat disc, the valve seat disc is arranged in the connecting pipe, and the valve seat disc is provided with a through hole facing the valve core; A second concave cavity is provided on a side of the connecting portion facing the connecting pipe, and along the axial direction of the connecting pipe, the valve seat disc is at least partially disposed in the second concave cavity.

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