Valve seat fixing structure and disc valve with same

Abstract

The utility model discloses a valve seat fixing structure and a disc valve with the valve seat fixing structure, the valve seat fixing structure comprises a valve body, a valve seat and a fixing structure, the valve body is provided with a first through hole; the valve seat is embedded in the first through hole; the fixing structure is arranged at the connecting position of the valve body and the valve seat, one end of the fixing structure is fixedly connected with the valve body, and the other end of the fixing structure is connected with the valve seat so that the valve seat can be stably fixed to the valve body. Through the arrangement, the fixing structure is used for replacing organic glue in the prior art, the installation strength of the valve seat installed on the valve body is improved, the adaptive capacity of the valve seat in different environments is improved, the structure is still reliable under the high-temperature working condition, the graphite sealing piece is placed between the valve seat and the valve body, and the graphite sealing piece is extruded and deformed through an auxiliary tool; and the valve seat and the valve body are well sealed.

Description

Technical Field

[0001] The utility model relates to the technical field of disk valve installation, and particularly relates to a valve seat fixing structure and a disk valve having the same. Background Art

[0002] Disk valves are commonly used in various harsh working conditions, such as high temperature and hard medium in silicone chemical plants. Therefore, its sealing element, the valve seat, is often made of sintered tungsten carbide, which makes its hardness much greater than that of silicon powder. However, sintered tungsten carbide is often brittle and not easy to process. Therefore, it is often connected to the valve body of the disk valve by means of glue bonding. Generally, organic glue has a temperature resistance of no more than 300°C. Although inorganic glue has a higher temperature resistance, its gas tightness is poor and its bonding strength is low, so it cannot be applied to high-temperature occasions. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the present utility model is to overcome the defect that the existing disk valve is often connected to the valve body of the disk valve by means of glue bonding. Generally, organic glue has a temperature resistance of no more than 300°C. Although inorganic glue has a higher temperature resistance, its gas tightness is poor and its bonding strength is low, so it cannot be applied to high-temperature occasions.

[0004] To this end, the present utility model provides a valve seat fixing structure, including:

[0005] A valve body, the valve body is provided with a first through hole;

[0006] A valve seat, the valve seat is embedded in the first through hole;

[0007] A fixing structure, the fixing structure is arranged at the connection position between the valve body and the valve seat. One end of the fixing structure is fixedly connected to the valve body, and the other end is connected to the valve seat to firmly fix the valve seat on the valve body.

[0008] Optionally, the inner wall of the first through hole is successively provided with a first fixing groove and a second fixing groove along its axial direction;

[0009] The first fixing groove is communicated with the second fixing groove, and the first fixing groove is used for installing the valve seat;

[0010] One end of the fixing structure is fixed by fitting the groove surface of the second fixing groove, and the other end of the fixing structure is connected to the valve seat.

[0011] Optionally, the fixing structure includes at least two split ring members, and at least two split ring members are arranged on the inner wall of the first through hole along the radial direction of the first through hole.

[0012] Optionally, any one of the split ring members is arranged in a fitting manner with another adjacent split ring member.

[0013] Optionally, the above open-loop member includes a first mounting portion and a second mounting portion; the second mounting portion is connected to the first mounting portion, and one end of the second mounting portion away from the first mounting portion is bent in a direction away from the axis of the first through hole.

[0014] Optionally, a third fixing groove is provided at one end of the inner wall of the above valve seat near the second fixing groove; one end of the third fixing groove away from the second fixing groove is recessed in a direction away from the axis of the first through hole;

[0015] The first mounting portion is fixed in the second fixing groove, and the second mounting portion is clamped in the third fixing groove.

[0016] Optionally, the connection position between the above valve body and the valve seat has a blocking surface intersecting with the plane where the axis of the valve body is located;

[0017] An installation groove is provided on the blocking surface, and a sealing member is placed in the installation groove.

[0018] Optionally, the thickness of the above sealing member is greater than the depth of the installation groove.

[0019] Optionally, an installation hole is further provided on the above valve body, and the installation hole is used to install an external auxiliary tooling;

[0020] Under the action of an external force, the installation hole provides a supporting force for the auxiliary tooling to drive the valve seat to squeeze the sealing member.

[0021] A disc valve includes the above valve seat fixing structure.

[0022] The technical solution provided by the present utility model has the following advantages:

[0023] 1. The valve seat fixing structure provided by the present utility model includes a valve body, a valve seat and a fixing structure. The valve body is provided with a first through hole; the valve seat is embedded in the first through hole; the fixing structure is arranged at the connection position between the valve body and the valve seat. One end of the fixing structure is fixedly connected to the valve body, and the other end is connected to the valve seat to firmly fix the valve seat on the valve body.

[0024] Through the above arrangement, using the fixing structure to replace the organic glue in the prior art improves the installation strength of the valve seat on the valve body, improves its adaptability in different environments, and the structure is still reliable under high-temperature working conditions. A graphite sealing member is placed between the valve seat and the valve body, and the auxiliary tooling is used to extrude and deform it, so that the seal between the valve seat and the valve body is good. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the valve seat fixing structure provided in the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the valve body provided in the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the valve seat provided in the present invention;

[0029] Figure 4 It is a longitudinal sectional view of the open-loop member provided in the present invention;

[0030] Explanation of reference numerals:

[0031] 1 - valve body; 11 - first fixing groove; 12 - second fixing groove; 13 - installation groove; 14 - installation hole;

[0032] 2 - valve seat; 21 - third fixing groove;

[0033] 3 - fixing structure; 31 - open-loop member; 311 - first installation part; 312 - second installation part;

[0034] 4 - seal;

[0035] 5 - auxiliary tooling; 51 - bolt; 52 - tightening plate. Specific embodiments

[0036] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] Embodiment 1

[0041] This embodiment provides a valve seat fixing structure, as Figures 1 to 4 shown, including a valve body 1, a valve seat 2, and a fixing structure 3. A first through hole is provided at the center of the valve body 1, and the axis of the first through hole coincides with the axis of the valve body 1. As Figure 1 shown, along the direction from top to bottom, the first through hole is provided with a stepped groove, a first fixing groove 11, and a second fixing groove 12. The stepped groove, the first fixing groove 11, and the second fixing groove 12 are all annular grooves, and the stepped groove, the first fixing groove 11, and the second fixing groove 12 are communicated in sequence. The inner diameter of the stepped groove is larger than the inner diameter of the first fixing groove 11, and the inner diameter of the first fixing groove 11 is larger than the inner diameter of the second fixing groove 12. An installation hole is provided at the top end of the valve body 1.

[0042] The outer wall of the valve seat 2 is provided with an annular step protrusion and an annular fixing protrusion corresponding to the step groove and the first fixing groove 11. To ensure the installation stability and the sealing performance of the entire valve body 1, the outer diameter of the annular step protrusion is equal to the inner diameter of the step groove, and the outer diameter of the annular fixing protrusion is equal to the inner diameter of the first fixing groove 11. Therefore, the valve seat 2 can be completely attached and placed in the step groove and the first fixing groove 11, that is, the outer surface of the annular step protrusion fits with the inner surface of the step groove, and the outer surface of the annular fixing protrusion fits with the inner surface of the first fixing groove 11. During the installation process, the lower end of the valve seat 2 with a smaller outer diameter is placed downward from the step groove with a larger inner diameter, which is convenient for the staff to perform installation positioning. The valve seat 2 abuts against the inside of the first through hole, which can prevent the valve seat 2 from shaking during the subsequent process. A second through hole is provided at the center of the valve seat 2, and the axes of the first through hole and the second through hole coincide. An annular third fixing groove 21 is provided at the lower end of the inner wall of the valve seat 2. When the valve seat 2 is installed in the first through hole, the third fixing groove 21 and the second fixing groove 12 are communicated to form a fixing groove with an inverted L-shaped longitudinal section. One end of the third fixing groove 21 away from the second fixing groove 12 is recessed in a direction away from the axis of the first through hole.

[0043] The fixing structure 3 includes at least two open-loop members 31. The open-loop member 31 includes a first installation portion 311 and a second installation portion 312; the second installation portion 312 is connected to the first installation portion 311, and one end of the second installation portion 312 away from the first installation portion 311 is bent in a direction away from the axis of the first through hole. The longitudinal section of the open-loop member 31 is also L-shaped, which is matched with the L-shaped fixing groove. At this time, the open-loop member 31 can be correspondingly installed with the fixing groove. The first installation portion 311 is fixed in the second fixing groove 12, the second installation portion 312 is clamped in the third fixing groove 21, and the bent area of the second installation portion 312 is clamped in the recessed position of the third fixing groove 21. Among them, the outer wall surface of the first installation portion 311 fits with the inner wall surface of the second fixing groove 12, and the outer wall surface of the second installation portion 312 fits with the inner wall surface of the third fixing groove 21.

[0044] Specifically, in this embodiment, four open-loop members 31 are provided. Figure 1 From a top-down perspective, the open-loop member 31 is fan-shaped. When four open-loop members 31 are provided, the central angle of each open-loop member 31 is 90 degrees, that is, a ring is cut into four identical 1 / 4 rings; when two open-loop members 31 are provided, the central angle of each open-loop member 31 is 180 degrees. Through the above settings, it can be ensured that when all the open-loop members 31 are installed in the second fixing groove 12 and the third fixing groove 21, any one open-loop member 31 is arranged in a fitting manner with another adjacent open-loop member 31.

[0045] In order to ensure the sealing performance between the valve seat 2 and the valve body 1, the connection position between the valve body 1 and the valve seat 2 has a blocking surface that intersects the plane where the axis of the valve body 1 is located. An installation groove 13 is formed on the blocking surface. The installation groove 13 is an annular groove centered on the first through hole. A sealing member 4 is placed in the installation groove 13. The sealing member 4 is an annular sealing member 4 corresponding to the installation groove 13. The thickness of the sealing member 4 is greater than the depth of the installation groove 13. The material of the sealing member 4 is graphite.

[0046] The auxiliary tooling 5 includes a bolt 51 and a pressing plate 52 fixed on the bolt 51.

[0047] Optionally, two adjacent open-loop members 31 can also be welded together, and multiple open-loop members 31 are welded into a complete annular member. The annular member can block the blocking surface and the sealing member 4, preventing the high-temperature medium from contacting the sealing member 4 and causing the sealing member 4 to deform, thereby affecting the sealing.

[0048] The installation process of the valve seat fixing structure provided in the present utility model is specifically as follows:

[0049] Place the valve body 1 on a plane. First, place the annular sealing member 4 in the annular installation groove 13. Then, place the valve seat 2 in the first fixing groove 11. Install the bolt 51 in the installation hole 14 to install the auxiliary tooling 5 on the valve body 1. Rotate the bolt 51 to drive the pressing plate 52 to move towards the valve seat 2 to squeeze the valve seat 2, causing the sealing member 4 to deform to achieve the sealing of the blocking surface between the valve seat 2 and the valve body 1. Install multiple open-loop members 31 in the second fixing groove 12 and the third fixing groove 21 in sequence along the radial direction of the first through hole. The first installation portion 311 is installed in the second fixing groove 12, and the bent area of the second installation portion 312 is clamped at the recessed position of the third fixing groove 21. Weld the bottom end of the first installation portion 311 to the valve body 1. The installation is completed.

[0050] Through the above settings, multiple open-loop members 31 are used to replace the organic glue in the prior art, improving the installation strength of the valve seat 2 installed on the valve body 1 and enhancing its adaptability in different environments. It remains structurally reliable under high-temperature working conditions. A graphite sealing member 4 is placed between the valve seat 2 and the valve body 1, and the auxiliary tooling 5 is used to squeeze and deform it, ensuring good sealing between the valve seat 2 and the valve body 1.

[0051] Embodiment 2

[0052] This embodiment provides a disc valve, including the valve seat fixing structure in Embodiment 1. The disc valve provided in this embodiment has the characteristic of ensuring the reliable operation of the valve seat 2 of the disc valve by setting the valve seat fixing structure, ensuring that the seal of the valve seat 2 of the disc valve will not fail. An assembly auxiliary tooling 5 is required during the assembly process.

[0053] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of this utility model creation.

Claims

1. A valve seat fixing structure, characterized in that, Comprising: A valve body (1), the valve body (1) is provided with a first through hole; A valve seat (2), the valve seat (2) is embedded in the first through hole; A fixing structure (3), the fixing structure (3) is arranged at the connection position between the valve body (1) and the valve seat (2), one end of the fixing structure (3) is fixedly connected to the valve body (1), and the other end is connected to the valve seat (2) to firmly fix the valve seat (2) on the valve body (1).

2. The valve seat fixing structure according to claim 1, characterized in that, The inner wall of the first through hole is successively provided with a first fixing groove (11) and a second fixing groove (12) along its axial direction; The first fixing groove (11) communicates with the second fixing groove (12), and the first fixing groove (11) is used for installing the valve seat (2); One end of the fixing structure (3) is fixed by fitting the groove surface of the second fixing groove (12), and the other end of the fixing structure (3) is connected to the valve seat (2).

3. The valve seat fixing structure according to claim 2, characterized in that, The fixing structure (3) includes at least two open-loop members (31), and at least two of the open-loop members (31) are arranged on the inner wall of the first through hole along the radial direction of the first through hole.

4. The valve seat fixing structure according to claim 3, characterized in that Any one of the open-loop members (31) is arranged in contact with another adjacent open-loop member (31).

5. The valve seat fixing structure according to claim 3, wherein, The open-loop member (31) includes a first mounting portion (311) and a second mounting portion (312); the second mounting portion (312) is connected to the first mounting portion (311), and one end of the second mounting portion (312) away from the first mounting portion (311) is bent in a direction away from the axis of the first through hole.

6. The valve seat fixing structure according to claim 5, characterized in that One end of the inner wall of the valve seat (2) close to the second fixing groove (12) is provided with a third fixing groove (21); the end of the third fixing groove (21) away from the second fixing groove (12) is recessed in a direction away from the axis of the first through hole; The first mounting portion (311) is fixed in the second fixing groove (12), and the second mounting portion (312) is clamped in the third fixing groove (21).

7. The valve seat fixing structure according to claim 1, characterized in that, The connection position between the valve body (1) and the valve seat (2) has a blocking surface intersecting the plane where the axis of the valve body (1) is located; An installation groove (13) is provided on the blocking surface, and a sealing member (4) is placed in the installation groove (13).

8. The valve seat fixing structure according to claim 7, characterized in that, The thickness of the sealing member (4) is greater than the depth of the installation groove (13).

9. The valve seat fixing structure according to claim 8, wherein, The valve body (1) is further provided with an installation hole (14), and the installation hole (14) is used for installing an external auxiliary tooling (5); Under the action of an external force, the installation hole provides a supporting force for the auxiliary tooling (5) to drive the valve seat (2) to squeeze the sealing member (4).

10. A disk valve, characterized in that, Comprising the valve seat (2) fixing structure (3) according to any one of claims 1-9.

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