Valve stem seal

Abstract

This utility model discloses a valve stem seal, including a valve body. A connecting block is installed inside the valve body, and a fixing ring is installed at the top of the connecting block. A connecting ring is located inside the fixing ring. A positioning structure includes a threaded rod penetrating the interior of a mounting ring, a guide rod installed at the top of a positioning plate, and a screwing block installed on one side of the threaded rod. This utility model utilizes the threaded rod penetrating the interior of the mounting ring, forming a threaded connection between the threaded rod and the mounting block. Tightening the screwing block rotates the threaded rod, causing it to move. This movement of the threaded rod moves the positioning plate, which then presses against the valve stem body. Multiple positioning plates can fix the valve stem body, thus securing the seal to the valve body. Anti-slip textures enhance the friction of the positioning plates, making their fixation more stable. The guide rod, penetrating the mounting ring, guides the movement of the positioning plate, thereby achieving the goal of facilitating stable installation of the valve stem seal.

Description

Technical Field

[0001] This utility model relates to the field of sealing valve technology, and in particular to valve stem seals. Background Technology

[0002] A valve stem is a device that uses a moving part to open, close, or partially block one or more openings or channels, allowing, blocking, or regulating the flow of liquid, air, or other airflows or large amounts of loose material. It is a crucial component of a valve, used for transmission, connecting to the actuator or handle at the top, and directly driving the valve core to move or rotate, thus achieving valve opening, closing, or regulation. During valve opening and closing, the valve stem is not only a moving and force-bearing component but also a sealing component. During installation, it is necessary to enhance the sealing between the valve stem and the valve body, which requires a valve stem seal to improve the valve stem's sealing performance.

[0003] To this end, the specification of patent CN205064848U discloses a valve stem seal that can very stably fix the seal in the radial direction and suppress radial wobble of the seal. Furthermore, a valve stem seal that can improve the sealing performance between the seal and the valve stem guide and suppress leakage of sealing fluids such as engine oil from the gap between the mounting ring and the valve stem guide is also provided. In a valve stem seal comprising a mounting ring mounted on the outer diameter side of the valve stem guide through which the valve stem is inserted, a sealing lip made of a rubber-like elastomer held at the end of the mounting ring and slidably and tightly in contact with the outer diameter surface of the valve stem, and a back pressure lip, a guide inner diameter side lip made of a rubber-like elastomer is provided, which is inserted into the inner diameter side of the valve stem guide and tightly in contact with the inner diameter surface of the valve stem guide.

[0004] The aforementioned seal is designed with a guide inner diameter lip made of a rubber-like elastomer that is inserted into the inner diameter side of the valve stem guide and in close contact with the inner diameter surface of the valve stem guide. However, during use, the seal needs to be securely fixed, and it may fall off during installation. Utility Model Content

[0005] The purpose of this invention is to provide a valve stem seal to solve the problem that existing valve stem seals are difficult to install stably.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a valve stem seal, including a valve body;

[0007] A connecting block is installed inside the valve body, a fixing ring is installed at the top of the connecting block, and a connecting ring is installed inside the fixing ring;

[0008] The valve body has a valve stem body installed inside, a sealing ring is installed on the inner side of the connecting ring, an installation ring is installed at the top of the fixing ring, and a positioning structure is installed on the inner side of the installation ring.

[0009] The positioning structure includes a threaded rod penetrating the interior of the mounting ring, a positioning plate mounted on one side of the threaded rod, a guide rod mounted on the top of the positioning plate, and a screwing block mounted on one side of the threaded rod.

[0010] In use, the sealing ring first seals the valve stem body. The sealing ring can be inflated through the air hole on one side. The inflated sealing ring can bulge and completely block the gap, strengthening the sealing between the valve stem and the connecting ring. The threaded block on the side of the air hole and the cover form a threaded connection. Tightening the cover can block the air hole. The sealing gasket inside the cover can strengthen the sealing of the air hole. When inflation is needed, the cover can be unscrewed to inflate the air hole.

[0011] Furthermore, the valve body has a slot at its top and a block at its bottom, forming a locking structure that facilitates disassembly.

[0012] Furthermore, a sealing structure is installed at the bottom of the connecting block, and the sealing structure includes a positioning block installed at the bottom of the connecting block, a rubber block installed at the bottom of the positioning block, a rubber ring installed on the outside of the positioning block, and a sealing block provided on the outside of the rubber ring, which can enhance the sealing between the valve body and the valve stem body.

[0013] Furthermore, an inflation structure is installed on one side of the sealing ring. The inflation structure includes an air hole installed on one side of the sealing ring, and a threaded block installed on one side of the air hole. A cover is installed on the outside of the threaded block, and a sealing gasket is installed inside the cover, which can inflate the sealing ring.

[0014] Furthermore, the threaded block and the cover form a threaded connection, and the inner diameter of the cover is larger than the outer diameter of the threaded block, so that the cover can cover the threaded block.

[0015] Furthermore, anti-slip textures are installed on one side of the positioning plate, and the anti-slip textures are arranged at equal intervals on one side of the positioning plate, which can enhance the friction of the positioning plate.

[0016] Furthermore, the outer side wall of the threaded rod is uniformly provided with external threads, and the inner side wall of the mounting ring is uniformly provided with internal threads that cooperate with the external threads. The threaded rod and the mounting ring are threadedly connected, and the rotation of the threaded rod can drive the threaded rod to move.

[0017] The valve stem seal provided by this utility model has the following advantages: during use, the seal can be stably fixed on the valve stem through the positioning structure, the sealing structure can enhance the sealing between the valve stem and the valve body, and then the sealing ring can be inflated through the inflation structure to make the sealing ring even better.

[0018] A threaded rod passes through the inside of the mounting ring, forming a threaded connection with the mounting block. Tightening the mounting block rotates the threaded rod, which then moves, causing the positioning plate to move as well. The positioning plate presses against the valve stem body, and multiple positioning plates can fix the valve stem body in place, thus securing the seal to the valve body. Anti-slip textures enhance the friction of the positioning plate, making it more stable. A guide rod passes through the mounting ring, guiding the movement of the positioning plate, thereby facilitating stable installation of the valve stem seal.

[0019] By installing a positioning block at the bottom of the connecting block, the positioning block can be locked onto the valve body. The rubber block is elastic, and its rotation is trapezoidal, making the positioning block more stable. At the same time, the rubber ring is made of rubber material, and it will lock into the gap of the valve body. Then the sealing block will squeeze the rubber ring, so that the rubber ring completely blocks the gap between the valve body, thereby achieving the purpose of the valve stem seal to facilitate sealing between the valve body and the valve stem body. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a front view cross-sectional structural diagram of the present invention;

[0022] Figure 3 For the present utility model Figure 2 Enlarged cross-sectional view of a portion of point A in the middle section;

[0023] Figure 4 This is a partial three-dimensional structural diagram of the positioning structure of this utility model;

[0024] Figure 5 This is a partial frontal cross-sectional view of the inflatable structure of this utility model.

[0025] The reference numerals in the figure are as follows: 1. Valve stem body; 2. Valve body; 3. Connecting block; 4. Sealing structure; 401. Positioning block; 402. Rubber ring; 403. Sealing block; 404. Rubber block; 5. Sealing ring; 6. Connecting ring; 7. Fixing ring; 8. Inflatable structure; 801. Air hole; 802. Cover; 803. Sealing gasket; 804. Threaded block; 9. Mounting ring; 10. Positioning structure; 1001. Positioning plate; 1002. Anti-slip texture; 1003. Guide rod; 1004. Threaded rod; 1005. Tightening block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 One embodiment of this utility model is a valve stem seal, which includes a valve body 2.

[0028] A connecting block 3 is installed inside the valve body 2. A sealing structure 4 is installed at the bottom of the connecting block 3. The sealing structure 4 includes a positioning block 401 installed at the bottom of the connecting block 3. A rubber block 404 is installed at the bottom of the positioning block 401. A rubber ring 402 is installed on the outside of the positioning block 401. A sealing block 403 is provided on the outside of the rubber ring 402.

[0029] See attached document Figure 2-3 As shown, the positioning block 401 can be locked onto the valve body 2, and the rubber block 404 is elastic. The rotation of the rubber block 404 is trapezoidal, and the rubber block 404 makes the positioning block 401 more stable. At the same time, the rubber ring 402 is made of rubber material. The rubber ring 402 will lock onto the gap of the valve body 2, and then the sealing block 403 will squeeze the rubber ring 402, so that the rubber ring 402 completely blocks the gap between the valve bodies 2.

[0030] The valve body 2 has a slot at its top and a block at its bottom, forming a locking structure.

[0031] A retaining ring 7 is installed at the top of the connecting block 3, and a connecting ring 6 is installed inside the retaining ring 7.

[0032] The valve body 2 is equipped with a valve stem body 1. A sealing ring 5 is installed on the inner side of the connecting ring 6. An inflation structure 8 is installed on one side of the sealing ring 5. The inflation structure 8 includes an air hole 801 installed on one side of the sealing ring 5. A threaded block 804 is installed on one side of the air hole 801. The threaded block 804 and the cover 802 form a threaded connection. The inner diameter of the cover 802 is larger than the outer diameter of the threaded block 804.

[0033] A cover 802 is installed on the outside of the threaded block 804, and a sealing gasket 803 is installed inside the cover 802.

[0034] See attached document Figure 1-2 and attached Figure 5As shown, the sealing ring 5 can seal the valve stem body 1. The sealing ring 5 can be inflated through the air hole 801 on one side. The inflated sealing ring 5 can bulge and completely block the gap, strengthening the sealing between the valve stem and the connecting ring 6. The threaded block 804 on one side of the air hole 801 and the cover 802 form a threaded connection. Tightening the cover 802 can block the air hole 801. The sealing gasket 803 inside the cover 802 can strengthen the sealing of the air hole 801. When inflation is required, the cover 802 can be unscrewed to inflate the air hole 801.

[0035] A mounting ring 9 is installed at the top of the fixing ring 7, and a positioning structure 10 is installed on the inner side of the mounting ring 9.

[0036] The positioning structure 10 includes a threaded rod 1004 passing through the interior of the mounting ring 9. External threads are uniformly arranged on the outer side wall of the threaded rod 1004, and internal threads that cooperate with the external threads are uniformly arranged on the inner side wall of the mounting ring 9. The threaded rod 1004 and the mounting ring 9 are threadedly connected.

[0037] A positioning plate 1001 is installed on one side of the threaded rod 1004, and anti-slip texture 1002 is installed on one side of the positioning plate 1001, with the anti-slip texture 1002 arranged at equal intervals on one side of the positioning plate 1001.

[0038] A guide rod 1003 is installed at the top of the positioning plate 1001, and a screw block 1005 is installed on one side of the threaded rod 1004.

[0039] See attached document Figure 1-2 and attached Figure 4 As shown, the threaded rod 1004 and the mounting block form a threaded connection. Tightening the screw block 1005 can drive the threaded rod 1004 to rotate. The rotation of the threaded rod 1004 will cause it to continue to move. The movement of the threaded rod 1004 will drive the positioning plate 1001 to move. The movement of the positioning plate 1001 will press against the valve stem body 1. Multiple sets of positioning plates 1001 can fix the valve stem body 1 and fix the seal to the valve body 2. The anti-slip texture 1002 can enhance the friction of the positioning plate 1001 and make the positioning plate 1001 more stable. The guide rod 1003 passes through the mounting ring 9 and can guide the movement of the positioning plate 1001.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A valve stem seal, comprising a valve body (2); characterized in that: A connecting block (3) is installed inside the valve body (2), a fixing ring (7) is installed at the top of the connecting block (3), and a connecting ring (6) is installed inside the fixing ring (7); a valve stem body (1) is installed inside the valve body (2), a sealing ring (5) is installed on the inner side of the connecting ring (6), an installation ring (9) is installed at the top of the fixing ring (7), and a positioning structure (10) is installed on the inner side of the installation ring (9); The positioning structure (10) includes a threaded rod (1004) passing through the interior of the mounting ring (9), and a positioning plate (1001) is installed on one side of the threaded rod (1004). A guide rod (1003) is installed at the top of the positioning plate (1001), and a screw block (1005) is installed on one side of the threaded rod (1004).

2. The valve stem seal according to claim 1, characterized in that: The valve body (2) has a slot at its top and a block at its bottom, and the valve body (2) and the connecting block (3) form a locking structure.

3. The valve stem seal according to claim 1, characterized in that: The bottom end of the connecting block (3) is equipped with a sealing structure (4), and the sealing structure (4) includes a positioning block (401) installed at the bottom end of the connecting block (3), a rubber block (404) installed at the bottom end of the positioning block (401), a rubber ring (402) installed on the outside of the positioning block (401), and a sealing block (403) provided on the outside of the rubber ring (402).

4. The valve stem seal according to claim 1, characterized in that: An inflation structure (8) is installed on one side of the sealing ring (5). The inflation structure (8) includes an air hole (801) installed on one side of the sealing ring (5), and a threaded block (804) installed on one side of the air hole (801). A cover (802) is installed on the outside of the threaded block (804), and a sealing gasket (803) is installed inside the cover (802).

5. The valve stem seal according to claim 4, characterized in that: The threaded block (804) and the cover (802) form a threaded connection, and the inner diameter of the cover (802) is larger than the outer diameter of the threaded block (804).

6. The valve stem seal according to claim 1, characterized in that: The positioning plate (1001) has anti-slip texture (1002) installed on one side, and the anti-slip texture (1002) is arranged at equal intervals on one side of the positioning plate (1001).

7. The valve stem seal according to claim 1, characterized in that: The outer side wall of the threaded rod (1004) is uniformly provided with external threads, and the inner side wall of the mounting ring (9) is uniformly provided with internal threads that cooperate with the external threads. The threaded rod (1004) and the mounting ring (9) are threadedly connected.

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