Rubber valve seat with good sealing performance

Abstract

The utility model relates to the field of rubber valve seats, in particular to a rubber valve seat with good sealing performance, which comprises a sealing outer shell and a sealing inner shell, sealing rings are arranged at the ends of the sealing outer shell and the sealing inner shell, an inserting groove and an annular groove are arranged on the inner side of the sealing outer shell, the annular groove is positioned at the bottom end of the inserting groove, the inserting groove is communicated with the annular groove, and the sealing inner shell is communicated with the inserting groove. The sealing outer shell is arranged in the valve in a sleeved mode, then the sealing inner shell is inserted into the sealing outer shell, in the process, the inserting rod of the sealing outer shell is clamped into the inserting groove, after the sealing inner shell is inserted into the sealing outer shell, the inserting rod slides to the annular groove, then the sealing inner shell is rotated, and the sealing inner shell is inserted into the sealing outer shell. The sealing outer shell is matched with the mounting holes in the sealing inner shell, the sealing performance of the device is guaranteed through the double-layer structure of the sealing outer shell and the sealing inner shell, then fixing bolts penetrate through the fixing holes to be connected with a valve, and it is guaranteed that the device is installed firmly.

Description

Technical Field

[0001] The utility model relates to the field of rubber valve seats, in particular to a rubber valve seat with good sealing performance. Background Art

[0002] The removable surface part in the valve is used to support the fully closed position of the valve core and form a sealing pair. Generally, the valve seat diameter is the maximum flow diameter of the valve. For example, the valve seat material of the butterfly valve is very wide, and various rubber, plastic, and metal materials can be used as valve seat materials, such as: EPDM, NBR, NR, PTFE, PEEK, PFA, SS315, STELLITE, etc.

[0003] Chinese patent CN210978728U discloses a rubber valve seat with a double sealing effect, including a valve seat inner shell, the valve seat inner shell includes a cylindrical inner shell and a cylindrical outer shell, the ends of the cylindrical inner shell and the cylindrical outer shell are both provided with a ring body, the outer surface of the cylindrical inner shell is provided with a plurality of assembly ridges at intervals, the inner wall of the cylindrical outer shell is provided with a plurality of assembly grooves at intervals, the cylindrical inner shell is installed in the cylindrical outer shell, and the assembly ridges of the cylindrical inner shell are installed in the assembly grooves of the cylindrical outer shell, the inner wall of the ring body is provided with a plurality of installation grooves at intervals, a sealing ring is provided inside the ring body, and elastic columns are provided on the outer surface of the sealing ring, and the elastic columns of the sealing ring are installed in the installation grooves of the ring body.

[0004] The cylindrical inner shell and the cylindrical outer shell of the above technical solution can be disassembled and assembled, and double sealing can be achieved after assembly. However, the stability of the device is poor, and the components are prone to offset after assembly. The fixation is not firm enough and there are certain limitations. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a rubber valve seat with good sealing performance.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the utility model provides a rubber valve seat with good sealing performance, comprising a sealing outer shell and a sealing inner shell, the sealing outer shell and the sealing inner shell end portions are provided with sealing rings, the inner side of the sealing outer shell is provided with a slot and an annular groove, the annular groove is located at the bottom end of the slot, the slot is communicated with the annular groove, an insertion rod is provided on the outer wall of the sealing inner shell, and the insertion rod is adapted to the slot and the annular groove, the sealing outer shell and the sealing inner shell are both provided with mounting holes, the sealing outer shell is adapted to the mounting holes on the sealing inner shell, a fixing groove is provided around the tail end of the sealing ring, a plurality of fixing holes are provided around the bottom of the fixing groove, and fixing bolts are installed on the fixing holes.

[0009] Preferably, two sealing rings are provided on the inner wall of the sealed inner shell, the sealing rings are semicircular ring structures, and the two sealing rings are respectively located at the front side and the rear side of the mounting hole.

[0010] Preferably again, a connecting hole is opened on the inner side of the sealing ring, a connecting bolt is installed in the connecting hole, and the connecting bolt passes through the connecting hole through a threaded structure and is connected to the sealing inner shell.

[0011] Further preferably, an embedding groove is provided inside the sealing inner shell, an embedding strip is provided on the back side of the sealing ring, and the sealing ring is installed in the embedding groove through the embedding strip.

[0012] As a preferred solution in the utility model, two slots are symmetrically provided on the inner side of the sealed shell, two mounting holes are symmetrically provided on the sealed shell and the sealed inner shell, and at least four fixing holes are provided around the bottom of the fixing groove.

[0013] In order to facilitate the installation of the sealing ring, the utility model is improved in that the sealing ring includes an inner ring and an outer ring, the outer ring is sleeved on the outer side of the inner ring, the outer wall of the inner ring is surrounded by an installation groove, the outer wall of the outer ring is surrounded by a through hole, and the through hole is adapted to the installation groove, and a limiting bolt is installed in the through hole.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a rubber valve seat with good sealing performance, which has the following beneficial effects:

[0016] The utility model inserts the sealing outer shell into the valve, and then inserts the sealing inner shell into the sealing outer shell. During this process, the plug rod of the sealing outer shell is inserted into the slot. After the sealing inner shell is inserted into the sealing outer shell, the plug rod slides to the annular groove, and then the sealing inner shell is rotated to make the sealing outer shell and the mounting hole on the sealing inner shell fit. The double-layer structure of the sealing outer shell and the sealing inner shell ensures the sealing performance of the device. Then, the fixing bolts are passed through the fixing holes to connect with the valve to ensure the firm installation of the device.

[0017] Generally, a valve plate for controlling the opening and closing of the valve is installed in the installation hole. When the valve plate is closed, the utility model uses two sealing rings to fit with the valve plate to further seal it. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the sealing inner shell structure of the utility model;

[0020] Figure 3This is a schematic diagram of the internal structure of the sealed inner shell of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the sealed housing of the utility model;

[0022] In the figure: 1, sealing outer shell; 2, sealing inner shell; 3, slot; 4, annular groove; 5, mounting hole; 6, outer ring; 7, fixing groove; 8, through hole; 9, fixing hole; 10, plug rod; 11, sealing ring; 12, embedded strip; DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] See also Figure 1-4 The utility model discloses a rubber valve seat with good sealing performance, comprising a sealing outer shell 1 and a sealing inner shell 2, wherein the sealing outer shell 1 and the sealing inner shell 2 are provided with sealing rings 6 at their ends, a slot 3 and an annular groove 4 are provided on the inner side of the sealing outer shell 1, wherein the annular groove 4 is located at the bottom end of the slot 3, wherein the slot 3 is communicated with the annular groove 4, an insertion rod 10 is provided on the outer wall of the sealing inner shell 2, and the insertion rod 10 is matched with the slot 3 and the annular groove 4, a mounting hole 5 is provided on the sealing outer shell 1 and the sealing inner shell 2, wherein the sealing outer shell 1 is matched with the mounting hole 5 on the sealing inner shell 2, a fixing groove 7 is provided around the tail end of the sealing ring 6, a plurality of fixing holes 9 are provided around the bottom of the fixing groove 7, and fixing bolts are installed on the fixing holes 9.

[0025] During the use of the device, it is necessary to ensure the sealing of the valve disc in the valve. Therefore, the preferred solution in the utility model is that two sealing rings 11 are provided on the inner wall of the sealing inner shell 2. The sealing ring 11 is a semicircular ring structure, and the two sealing rings 11 are respectively located on the front and rear sides of the mounting hole 5. According to the above structure, the valve disc of a general valve will be located at the position of the mounting hole 5. When the valve disc is closed, the two sealing rings 11 are used to fit the valve disc to further seal it. At the same time, the sealing rings 11 are arranged on the front and rear sides of the mounting hole 5, so that they are also on the front and rear sides of the valve disc to avoid affecting the opening and closing of the valve disc.

[0026] After the valve is used for a long time, the valve disc will inevitably need to be disassembled and replaced. When disassembling and replacing it, the sealing ring 11 needs to be removed first. Therefore, the preferred scheme of the utility model is that a connecting hole is provided on the inner side of the sealing ring 11, and a connecting bolt is installed in the connecting hole. The connecting bolt passes through the connecting hole through a threaded structure and is connected to the sealing inner shell 2. An embedding groove is provided inside the sealing inner shell 2, and an embedding strip 12 is provided on the back side of the sealing ring 11. The sealing ring 11 is installed in the embedding groove through the embedding strip 12. According to the above structure, since the sealing ring 11 is made of rubber, the sealing ring 11 has a certain plasticity, which is convenient for embedding and installing in the embedding groove. The sealing ring 11 is installed in the embedding groove to ensure the sealing of its installation, and is fixed by the connecting bolt. Conversely, it is also convenient to disassemble it.

[0027] In order to facilitate the installation of the valve stem for controlling the rotation of the valve plate and ensure the stability of the device when fixed on the valve, the preferred scheme of the utility model is that two slots 3 are symmetrically provided on the inner side of the sealing shell 1, two mounting holes 5 are symmetrically provided on the sealing shell 1 and the sealing inner shell 2, and at least four fixing holes 9 are provided around the bottom of the fixing groove 7.

[0028] When fixing the device, it is necessary to use fixing bolts to pass through the fixing holes 9 and connect with the valve. In order to facilitate the installation of the fixing bolts on the fixing holes 9, the preferred scheme of the utility model is that the sealing ring includes an inner ring and an outer ring, and the outer ring is sleeved on the outer side of the inner ring. The outer wall of the inner ring is surrounded by a mounting groove, and the outer wall of the outer ring is surrounded by a through hole 8, and the through hole 8 is adapted to the mounting groove, and a limiting bolt is installed in the through hole 8. According to the above structure, when fixing the device, the outer ring can be removed from the inner ring first to leave space for operating the fixing bolts, and then the outer ring can be sleeved on the outer side of the inner ring.

[0029] During the use of the rubber valve seat with good sealing performance, the sealing shell 1 is first inserted into the valve, and then the sealing inner shell 2 is inserted into the sealing shell 1. During this process, the plug rod 10 of the sealing shell 1 is inserted into the slot 3. After the sealing inner shell 2 is inserted into the sealing shell 1, the plug rod 10 slides to the annular groove 4, and then the sealing inner shell 2 is rotated to make the sealing shell 1 and the mounting hole 5 on the sealing inner shell 2 fit. When fixing the device, the outer ring of the sealing ring is first removed from the inner ring to leave space for operating the fixing bolts, and the fixing bolts are passed through the fixing holes 9 to connect with the valve to ensure the firmness of the installation of the device, and then the outer ring is sleeved on the outside of the inner ring. Generally, a valve plate for controlling the opening and closing of the valve will be installed at the position in the mounting hole 5. When the valve plate is closed, two sealing rings 11 are used to fit the valve plate to further seal it. At the same time, the sealing ring 11 is arranged on the front and rear sides of the mounting hole 5, so that it is also on the front and rear sides of the valve plate to avoid affecting the opening and closing of the valve plate.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rubber valve seat with good sealing performance, characterized in that: The invention comprises a sealing outer shell (1) and a sealing inner shell (2), wherein the ends of the sealing outer shell (1) and the sealing inner shell (2) are provided with sealing rings (6), the inner side of the sealing outer shell (1) is provided with a slot (3) and an annular groove (4), the annular groove (4) is located at the bottom end of the slot (3), the slot (3) is communicated with the annular groove (4), an insertion rod (10) is provided on the outer wall of the sealing inner shell (2), and the insertion rod (10) is matched with the slot (3) and the annular groove (4), the sealing outer shell (1) and the sealing inner shell (2) are both provided with mounting holes (5), the sealing outer shell (1) and the sealing inner shell (2) are matched with the mounting holes (5) on the sealing inner shell (2), a fixing groove (7) is arranged around the tail end of the sealing ring (6), a plurality of fixing holes (9) are arranged around the bottom of the fixing groove (7), and fixing bolts are installed on the fixing holes (9).

2. A rubber valve seat with good sealing performance according to claim 1, characterized in that: Two sealing rings (11) are provided on the inner wall of the sealing inner shell (2); the sealing rings (11) are semicircular ring structures, and the two sealing rings (11) are respectively located at the front side and the rear side of the mounting hole (5).

3. A rubber valve seat with good sealing performance according to claim 2, characterized in that: Two slots (3) are symmetrically arranged on the inner side of the sealed housing (1).

4. A rubber valve seat with good sealing performance according to claim 3, characterized in that: The sealing ring comprises an inner ring and an outer ring, wherein the outer ring is sleeved on the outer side of the inner ring, a mounting groove is arranged around the outer wall of the inner ring, a through hole (8) is arranged around the outer wall of the outer ring, and the through hole (8) is matched with the mounting groove, and a limiting bolt is installed in the through hole (8).

5. A rubber valve seat with good sealing performance according to claim 4, characterized in that: A connecting hole is provided on the inner side of the sealing ring (11), a connecting bolt is installed in the connecting hole, and the connecting bolt passes through the connecting hole through a threaded structure and is connected to the sealing inner shell (2).

6. A rubber valve seat with good sealing performance according to claim 5, characterized in that: An embedding groove is provided inside the sealing inner shell (2), an embedding strip (12) is provided on the back side of the sealing ring (11), and the sealing ring (11) is installed in the embedding groove via the embedding strip (12).

7. A rubber valve seat with good sealing performance according to claim 6, characterized in that: Two mounting holes (5) are symmetrically arranged on the sealing outer shell (1) and the sealing inner shell (2).

8. A rubber valve seat with good sealing performance according to claim 7, characterized in that: At least four fixing holes (9) are arranged around the bottom of the fixing groove (7).

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