Quick-change type soft and hard double-seal regulating valve

Abstract

The utility model provides a quick-change type soft and hard double-seal regulating valve which comprises a valve body, a valve seat and a valve core, wherein the valve seat and the valve core are arranged in the valve body; a through-flow hole is formed in the middle of the valve seat, an annular concave part is arranged on the top face of the valve seat, and the concave part is arranged on the periphery of the through-flow hole. A sealing ring is arranged in the concave part; a first hard sealing surface is arranged at the top of the inner wall of the through-flow hole; the bottom end of the valve element is provided with a first sealing part corresponding to the through-flow hole, the first sealing part is provided with a second hard sealing face, and the second hard sealing face abuts against the first hard sealing face. An annular second sealing part is arranged at the top of the first sealing part, and the bottom face of the second sealing part abuts against the top face of the sealing ring. The sealing performance of the valve can be effectively improved, the leakage rate is reduced, high-temperature and high-pressure resistance and abrasion resistance are achieved, the service life is prolonged, and meanwhile parts can be rapidly replaced during maintenance and repair.

Description

Technical Field

[0001] The utility model relates to a regulating valve, in particular to a quick-change soft and hard double-sealed regulating valve. Background Art

[0002] At present, the sealing of the regulating valve adopts the form of soft seal or hard seal. Among them, soft seal is suitable for low pressure, low temperature and general corrosive media. The advantages of soft seal are good sealing, easy operation and relatively cheap price. However, soft seal is easily affected by temperature, pressure and medium, which affects the sealing effect. Among them, hard seal can be used in harsh working conditions such as high temperature, high pressure and highly corrosive media, but the price is higher, the operation is more complicated, the sealing performance is average, and it is also necessary to pay attention to the design and processing quality of the seal.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a quick-change soft and hard double-sealed regulating valve, which can effectively improve the sealing performance of the valve, reduce leakage, withstand high temperature and high pressure, resist wear, extend service life, and at the same time realize rapid replacement of parts during maintenance and repair.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A quick-change soft and hard double-sealed regulating valve, comprising a valve body, a valve seat and a valve core arranged in the valve body;

[0007] A through hole is provided in the middle of the valve seat, an annular recess is provided on the top surface of the valve seat, and the recess is provided on the outer periphery of the through hole; a sealing ring is provided in the recess; and a first hard sealing surface is provided on the top of the inner wall of the through hole;

[0008] A first sealing portion corresponding to the flow hole is provided at the bottom end of the valve core, and the first sealing portion is provided with a second hard sealing surface, and the second hard sealing surface is abutted against the first hard sealing surface; an annular second sealing portion is provided at the top of the first sealing portion, and the bottom surface of the second sealing portion is abutted against the top surface of the sealing ring.

[0009] According to an embodiment of the utility model, an annular mounting groove is provided on the top surface of the recessed portion, an elastic ring is provided in the mounting groove, and the elastic ring abuts against the bottom surface of the sealing ring.

[0010] According to an embodiment of the utility model, the top of the elastic ring protrudes from the surface of the recessed portion.

[0011] According to an embodiment of the utility model, a clamping ring is sleeved on the top of the valve seat, and the clamping ring presses the sealing ring against the surface of the recessed portion.

[0012] According to one embodiment of the utility model, the inner side of the clamping ring is provided with a first step portion and a second step portion in an inverted L shape from bottom to top; the outer side of the recessed portion is arranged in the first step portion, and the outer side of the sealing ring is arranged in the second step portion.

[0013] According to an embodiment of the utility model, a valve cover is provided on the top of the valve body, a sleeve is provided between the valve cover and the clamping ring, and the valve core is located in the sleeve.

[0014] According to one embodiment of the utility model, a through hole is provided on the side wall of the sleeve.

[0015] According to an embodiment of the utility model, a valve stem is provided on the top of the valve core, and the valve stem is inserted into the valve cover.

[0016] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0017] 1. The quick-change soft and hard double-sealed regulating valve provided by the embodiment of the utility model adopts a quick-change structure, and all parts are assembled by inserting and pressing. Assembly and subsequent maintenance and replacement of parts can be easily achieved without any tooling, and rapid online maintenance can be achieved at the site of use, effectively saving time and cost for disassembly and assembly.

[0018] 2. The quick-change soft and hard double-seal regulating valve provided in the embodiment of the utility model has the advantages of wear resistance, high temperature and high pressure resistance, long service life, good sealing performance, and small leakage due to the use of a soft and hard double-seal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0020] Figure 1 A schematic diagram of the structure of a quick-change soft and hard double-seal regulating valve provided in an embodiment of the utility model;

[0021] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 3 A schematic diagram of the structure of a valve seat of a quick-change soft and hard double-seal regulating valve provided in an embodiment of the utility model;

[0023] Figure 4 A schematic structural diagram of a valve core of a quick-change soft and hard double-sealed regulating valve provided in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Valve body; 11. Inlet pipe; 12. Outlet pipe; 2. Valve seat; 21. Through hole; 211. First hard sealing surface; 22. Recessed portion; 23. Mounting groove; 3. Valve core; 31. First sealing portion; 311. Second hard sealing surface; 32. Second sealing portion; 4. Sealing ring; 5. Elastic ring; 6. Clamping ring; 61. First step portion; 62. Second step portion; 7. Valve cover; 8. Sleeve; 81. Through hole; 9. Valve stem. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0027] In the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. The directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense, for example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] like Figure 1 As shown, an embodiment of the utility model provides a quick-change soft and hard double-sealed regulating valve, comprising a valve body 1 and a valve seat 2 and a valve core 3 arranged in the valve body 1.

[0029] like Figure 2 , Figure 3 As shown, a through hole 21 is provided in the middle of the valve seat 2 for connecting the inlet pipe 11 and the outlet pipe 12 of the valve body 1. An annular recessed portion 22 is provided on the top surface of the valve seat 2, and the recessed portion 22 is provided on the outer periphery of the through hole 21. A sealing ring 4 is provided in the recessed portion 22, and the sealing ring 4 is made of a flexible material. A first hard sealing surface 211 is provided on the top of the inner wall of the through hole 21 for forming a hard seal with the valve core 3.

[0030] like Figure 2 , Figure 4 As shown, the bottom end of the valve core 3 is provided with a first sealing portion 31 corresponding to the through hole 21, and the first sealing portion 31 can be inserted into the through hole 21 to realize the opening and closing of the through hole 21. Specifically, the first sealing portion 31 is provided with a second hard sealing surface 311, and the second hard sealing surface 311 abuts against the first hard sealing surface 211, and a hard seal is formed between the two. At the same time, the top of the first sealing portion 31 is also provided with an annular second sealing portion 32, and the bottom surface of the second sealing portion 32 abuts against the top surface of the sealing ring 4, and a soft seal is formed between the two.

[0031] The quick-change soft and hard double seal regulating valve provided by the embodiment of the utility model adopts a quick-change structure, and the sealing ring 4 can be placed in the recessed part 22 to achieve installation. It can be easily assembled and the parts can be repaired and replaced later without any tooling. It can be quickly repaired online at the use site, effectively saving the time and cost of disassembly and assembly. In addition, the quick-change soft and hard double seal regulating valve provided by the utility model has a matching hard sealing surface on the valve core 3 and the valve seat 2, and the sealing life is long. The second sealing part 32 of the valve core 3 cooperates with the sealing ring 4 to form a soft seal, and the sealing performance is excellent. Due to the use of the soft and hard double seal structure, it has the advantages of wear resistance, high temperature and high pressure resistance, long service life, good sealing performance, and small leakage.

[0032] like Figure 2 , Figure 3 As shown, in a preferred embodiment of the utility model, the top surface of the recessed portion 22 is provided with an annular mounting groove 23, and an elastic ring 5 is provided in the mounting groove 23, and the elastic ring 5 is against the bottom surface of the sealing ring 4. The elastic ring 5 can provide an upward elastic force to the sealing ring 4, and at the same time as the valve core 3 and the valve seat 2 are sealed, a better sealing effect is formed between the second sealing portion 32 of the valve core 3 and the sealing ring 4. Furthermore, the top of the elastic ring 5 protrudes from the surface of the recessed portion 22 to increase the elastic force provided by the elastic ring 5 to the sealing ring 4.

[0033] like Figure 2 , Figure 3As shown, in a preferred embodiment of the present invention, a clamping ring 6 is sleeved on the top of the valve seat 2, and the clamping ring 6 presses the sealing ring 4 against the surface of the recessed portion 22. Specifically, the clamping ring 6 presses the outer side of the sealing ring 4, and the second sealing portion 32 presses the inner side of the sealing ring 4. The sealing ring 4 is pressed against the surface of the recessed portion 22 of the valve seat 2 by the clamping ring 6. Only by removing the clamping ring 6, the sealing ring 4 below can be removed and replaced, making the maintenance and replacement of the sealing ring 4 extremely convenient.

[0034] like Figure 2 As shown, in order to provide better positioning for the sealing ring 4, the inner side of the clamping ring 6 is provided with an inverted L-shaped first step portion 61 and a second step portion 62 from bottom to top. The outer side of the recessed portion 22 is arranged in the first step portion 61, and the outer side of the sealing ring 4 is arranged in the second step portion 62.

[0035] like Figure 1 As shown, in one embodiment of the utility model, a valve cover 7 is provided on the top of the valve body 1, a sleeve 8 is provided between the valve cover 7 and the clamping ring 6, and the valve core 3 is located in the sleeve 8. The clamping ring 6 can be pressed onto the valve seat 2 through the sleeve 8, thereby fixing the sealing ring 4 below the clamping ring 6. Furthermore, a through hole 81 is provided on the side wall of the sleeve 8 for achieving communication between the through hole 21 and the outlet pipe 12 of the valve body 1.

[0036] like Figure 1 As shown, in one embodiment of the utility model, a valve stem 9 is provided on the top of the valve core 3 , and the valve stem 9 is penetrated in the valve cover 7 and can slide vertically, thereby driving the valve core 3 to move up and down to perform an on-off operation on the flow hole 21 of the valve seat 2 .

[0037] In summary, the utility model has the following advantages:

[0038] 1. The quick-change soft and hard double-sealed regulating valve provided by the embodiment of the utility model adopts a quick-change structure, and all parts are assembled by inserting and pressing. Assembly and subsequent maintenance and replacement of parts can be easily achieved without any tooling, and rapid online maintenance can be achieved at the site of use, effectively saving time and cost for disassembly and assembly.

[0039] 2. The quick-change soft and hard double-seal regulating valve provided in the embodiment of the utility model has the advantages of wear resistance, high temperature and high pressure resistance, long service life, good sealing performance, and small leakage due to the use of a soft and hard double-seal structure.

[0040] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A quick-change soft and hard double-seal regulating valve, characterized in that: It comprises a valve body (1), a valve seat (2) and a valve core (3) arranged in the valve body (1); A flow hole (21) is provided in the middle of the valve seat (2); an annular recessed portion (22) is provided on the top surface of the valve seat (2); the recessed portion (22) is arranged on the outer periphery of the flow hole (21); a sealing ring (4) is provided in the recessed portion (22); and a first hard sealing surface (211) is provided on the top of the inner wall of the flow hole (21); The bottom end of the valve core (3) is provided with a first sealing portion (31) corresponding to the flow hole (21), and the first sealing portion (31) is provided with a second hard sealing surface (311), and the second hard sealing surface (311) is in contact with the first hard sealing surface (211); the top of the first sealing portion (31) is provided with an annular second sealing portion (32), and the bottom surface of the second sealing portion (32) is in contact with the top surface of the sealing ring (4).

2. The quick-change soft and hard double-seal regulating valve according to claim 1 is characterized in that: An annular mounting groove (23) is provided on the top surface of the recessed portion (22), an elastic ring (5) is provided in the mounting groove (23), and the elastic ring (5) abuts against the bottom surface of the sealing ring (4).

3. The quick-change soft and hard double-seal regulating valve according to claim 2 is characterized in that: The top of the elastic ring (5) protrudes from the surface of the recessed portion (22).

4. The quick-change soft and hard double-seal regulating valve according to claim 1, 2 or 3, characterized in that: A clamping ring (6) is sleeved on the top of the valve seat (2), and the clamping ring (6) presses the sealing ring (4) against the surface of the recessed portion (22).

5. The quick-change soft and hard double-seal regulating valve according to claim 4 is characterized in that: The inner side of the clamping ring (6) is provided with a first step portion (61) and a second step portion (62) in an inverted L shape from bottom to top; the outer side of the recessed portion (22) is arranged in the first step portion (61), and the outer side of the sealing ring (4) is arranged in the second step portion (62).

6. The quick-change soft and hard double-seal regulating valve according to claim 4 is characterized in that: A valve cover (7) is provided on the top of the valve body (1), a sleeve (8) is provided between the valve cover (7) and the clamping ring (6), and the valve core (3) is located in the sleeve (8).

7. The quick-change soft and hard double-seal regulating valve according to claim 6 is characterized in that: The side wall of the sleeve (8) is provided with a through hole (81).

8. The quick-change soft and hard double-seal regulating valve according to claim 6, characterized in that: A valve stem (9) is provided on the top of the valve core (3), and the valve stem (9) is inserted into the valve cover (7).

Images