Mechanical seal structure of a three-way valve

Abstract

The utility model discloses a mechanical seal structure of three -way valve belongs to three -way valve technical field, aims at solving the problem of three -way valve leakage under the present technique after the valve switches many times, the ball and the valve seat will pass through repeated friction, lead to sealing surface material gradually wear and tear, and then sealing structure wear possibly leads to three -way valve water leakage. Including three -way valve body, the inside installation of three -way valve body has the ball, the upper side intermediate position department of ball is welded with valve stem, the outside of valve stem is connected with handle, the upper end of valve stem is connected with adjusting mechanism, the adjusting mechanism includes the fixed ring of fixed connection in three -way valve body upper side intermediate position department, the inside of three -way valve body is provided with auxiliary sealing mechanism, and auxiliary sealing mechanism includes the first spring of connection in three -way valve body inside four corners, one end of first spring is fixedly connected with sliding plate, and the side fixed connection of sliding plate away from first spring has rubber pad.

Description

Technical Field

[0001] This utility model belongs to the field of three-way valve technology, specifically relating to a mechanical seal structure for a three-way valve. Background Technology

[0002] The sealing structure of a three-way ball valve is a key component combination that ensures reliable sealing when switching between different passages. Its design directly affects the valve's leakage rate, pressure resistance, and service life. A three-way ball valve switches by rotating the ball around the valve body's centerline, typically by 90°, achieving a seal through the precise fit between the ball's surface and the valve seat. When the ball rotates to a specific position, its internal passage connects with different interfaces on the valve body, while the unconnected interfaces are blocked from media flow by the sealing structure, preventing leakage.

[0003] The core function of the sealing structure is to block the flow of media by tightly fitting the ball and the valve seat. However, after the valve is opened and closed multiple times, the ball and the valve seat will undergo repeated friction, which will cause the sealing surface material to wear out gradually. In this case, the wear of the sealing structure may lead to leakage of the three-way valve. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a mechanical seal structure for a three-way valve, aiming to solve the problem that in existing technologies, after repeated opening and closing of the valve, the ball and valve seat will undergo repeated friction, leading to gradual wear of the sealing surface material, and the wear of the sealing structure may cause water leakage in the three-way valve.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a mechanical sealing structure for a three-way valve, including a three-way valve body, a ball installed inside the three-way valve body, a valve stem welded to the upper middle position of the ball, a handle connected to the outer side of the valve stem, an adjusting mechanism connected to the upper end of the valve stem, an auxiliary sealing mechanism provided inside the three-way valve body, and the auxiliary sealing mechanism including a first spring connected to the four corners inside the three-way valve body, a sliding plate fixedly connected to one end of the first spring, and a rubber pad fixedly connected to the side of the sliding plate away from the first spring.

[0008] Furthermore, the adjusting mechanism includes a fixing ring fixedly connected to the middle position of the upper side of the three-way valve body, a top ring fixedly connected to the outer side of the upper end of the valve stem, a second spring fixedly connected to the lower side of the top ring, a limit rod fixedly connected to the outer side of the upper end of the valve stem, and a locking plate fixedly connected to the lower side of the handle.

[0009] Furthermore, the three-way valve body has grooves at its four corners that are connected to the inner cavity of the three-way valve body. The inner side of the inner cavity of the three-way valve body is slidably connected to the outer side of the ball. The end of the first spring away from the sliding plate is fixedly connected to the innermost end of the groove. The outer side of the sliding plate is slidably connected to the inner side of the groove.

[0010] Furthermore, the side of the rubber pad away from the rubber pad is slidably connected to the outer side of the sphere.

[0011] Furthermore, the outer side of the valve stem is rotatably connected to the inner side of the retaining ring.

[0012] Furthermore, a sliding hole is provided at the middle position of the left end of the handle, and a limiting groove is provided at the four corners of the sliding hole on the left end of the handle. The lower end of the second spring is fixedly connected to the upper side of the left end of the handle, the outer side of the upper end of the valve stem is slidably connected to the inner side of the sliding hole, and the outer side of the limiting rod is slidably connected to the inner side of the limiting groove.

[0013] Furthermore, the upper left, front and right ends of the fixing ring are provided with slots, and the lower outer side of the card plate engages with the inner side of the slot.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention, by setting an auxiliary sealing mechanism, ensures that the first spring in the groove, which is in a compressed state, can always exert a pushing force on the sliding plate. This causes the side of the rubber pad away from the sliding plate to press against the surface of the ball, so that the ball is blocked by the sliding plates and rubber pads at the four corners inside the three-way valve body. Therefore, even when wear occurs between the three-way valve body and the ball, the flow channels of the ball will not be connected through the gap between the inner cavity of the three-way valve body and the ball, and no water leakage will occur.

[0017] This utility model, by setting an adjustment mechanism, allows the valve stem to rotate when the handle is lifted and then rotated, causing the ball to rotate to the required angle. After the handle is released, the second spring pushes the handle down, causing the locking plate to move into the corresponding slot, thus re-fixing the handle. This ensures that even after wear occurs on the outer surface of the ball, the valve stem can still be fixed after rotation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the three-way valve body of this utility model;

[0021] Figure 3 This is a schematic diagram of the auxiliary sealing mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the adjustment unit of this utility model.

[0023] The markings in the attached diagram are as follows: 1. Three-way valve body; 2. Ball; 3. Valve stem; 4. Handle; 501. First spring; 502. Sliding plate; 503. Rubber pad; 601. Fixing ring; 602. Top ring; 603. Second spring; 604. Limiting rod; 605. Locking plate. Detailed Implementation

[0024] 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.

[0025] This specific embodiment is a mechanical seal structure for a three-way valve, and its structural schematic diagram is shown below. Figures 1 to 3As shown, the device includes a three-way valve body 1, with a ball 2 installed inside. A valve stem 3 is welded to the upper middle position of the ball 2, and a handle 4 is connected to the outer side of the valve stem 3. An adjusting mechanism is connected to the upper end of the valve stem 3. An auxiliary sealing mechanism is provided inside the three-way valve body 1, including a first spring 501 connected to the four corners inside the three-way valve body 1. One end of the first spring 501 is fixedly connected to a sliding plate 502. Grooves connected to the inner cavity of the three-way valve body 1 are formed at the four corners inside the three-way valve body 1. The inner side of the inner cavity of the three-way valve body 1 is slidably connected to the outer side of the ball 2. The end of the first spring 501 away from the sliding plate 502 is fixedly connected to the innermost end of the groove. The outer side of the sliding plate 502 is slidably connected to the inner side of the groove. A rubber pad 503 is fixedly connected to the side of the sliding plate 502 away from the first spring 501. The side of the rubber pad 503 away from the first spring 501 is slidably connected to the outer side of the ball 2. Thus, the first spring 501, which is in a compressed state in the groove, can always exert a pushing force on the sliding plate 502. This causes the side of the rubber pad 503 away from the sliding plate 502 to press against the surface of the ball 2. The ball 2 is blocked by the sliding plates 502 and the rubber pad 503 at the four corners of the three-way valve body 1. Therefore, when wear occurs between the three-way valve body 1 and the ball 2, the flow channels of the ball 2 will not be connected through the gap between the inner cavity of the three-way valve body 1 and the ball 2, and there will be no leakage. When wear occurs on the side of the rubber pad 503 that contacts the ball 2, the sliding plate 502, which is compressed by the first spring 501, will push the rubber pad 503 so that the side away from the sliding plate 502 continues to contact the surface of the ball 2, thus maintaining a seal on the inside of the three-way valve body 1.

[0026] Cooperate Figure 4 As shown, the adjusting mechanism includes a fixing ring 601 fixedly connected to the middle position of the upper side of the three-way valve body 1. The outer side of the valve stem 3 is rotatably connected to the inner side of the fixing ring 601. A top ring 602 is fixedly connected to the outer side of the upper end of the valve stem 3, and a second spring 603 is fixedly connected to the lower side of the top ring 602. A limit rod 604 is fixedly connected to the outer side of the upper end of the valve stem 3. A sliding hole is provided at the middle position of the left end of the handle 4, and limit grooves are provided at the four corners of the sliding hole on the left end of the handle 4. The lower end of the second spring 603 is fixedly connected to the upper side of the left end of the handle 4. The outer side of the upper end of the valve stem 3 is slidably connected to the inner side of the sliding hole, and the outer side of the limit rod 604 is slidably connected to the inner side of the limit groove. Thus, when the second spring 603 springs, it can drive the handle 4 to slide along the outer side of the valve stem 3 and the limit rod 604.

[0027] The lower side of the handle 4 is fixedly connected to a retaining plate 605. The upper left, front, and right ends of the retaining ring 601 are provided with retaining grooves, and the lower outer side of the retaining plate 605 engages with the inner side of the retaining groove. Thus, by first lifting the handle 4 and then rotating it, the valve stem 3 rotates, causing the ball 2 to rotate to the desired angle. Then, by releasing the handle 4, the second spring 603 pushes the handle 4 down, causing the retaining plate 605 to move into the corresponding retaining groove, allowing the handle 4 to be re-fixed. Therefore, even after wear occurs on the outer surface of the ball 2, the valve stem 3 can still be fixed after rotation.

[0028] Working principle: After the ball 2 wears down due to friction between its rotation and the inner cavity of the three-way valve body 1 over a long period of time, the first spring 501 in the groove, which is in a compressed state, continuously exerts a pushing force on the sliding plate 502. This causes the side of the rubber pad 503 away from the sliding plate 502 to continuously press the surface of the ball 2. As a result, the ball 2 is blocked by the sliding plates 502 and rubber pads 503 at the four corners of the three-way valve body 1. Thus, water entering the gap between the inner cavity of the three-way valve body 1 and the ball 2 is blocked by the sliding plates 502 and rubber pads 503. The various flow channels of the ball 2 will still not be connected through the gap between the inner cavity of the three-way valve body 1 and the ball 2, and no water leakage will occur.

[0029] All technical features in this embodiment can be freely combined according to actual needs.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanical seal structure for a three-way valve, comprising a three-way valve body (1), characterized in that, The three-way valve body (1) has a ball (2) installed inside. A valve stem (3) is welded to the middle of the upper side of the ball (2). A handle (4) is connected to the outside of the valve stem (3). An adjustment mechanism is connected to the upper end of the valve stem (3). An auxiliary sealing mechanism is provided inside the three-way valve body (1). The auxiliary sealing mechanism includes a first spring (501) connected to the four corners inside the three-way valve body (1). A sliding plate (502) is fixedly connected to one end of the first spring (501). A rubber pad (503) is fixedly connected to the side of the sliding plate (502) away from the first spring (501).

2. The mechanical seal structure of a three-way valve according to claim 1, characterized in that, The adjusting mechanism includes a fixing ring (601) fixedly connected to the middle position of the upper side of the three-way valve body (1), a top ring (602) fixedly connected to the outer side of the upper end of the valve stem (3), a second spring (603) fixedly connected to the lower side of the top ring (602), a limit rod (604) fixedly connected to the outer side of the upper end of the valve stem (3), and a clamping plate (605) fixedly connected to the lower side of the handle (4).

3. The mechanical seal structure of a three-way valve according to claim 1, characterized in that, The three-way valve body (1) has grooves at its four corners that are connected to the inner cavity of the three-way valve body (1). The inner side of the inner cavity of the three-way valve body (1) is slidably connected to the outer side of the ball (2). The end of the first spring (501) away from the sliding plate (502) is fixedly connected to the innermost end of the groove. The outer side of the sliding plate (502) is slidably connected to the inner side of the groove.

4. The mechanical seal structure of a three-way valve according to claim 1, characterized in that, The side of the rubber pad (503) away from the rubber pad (503) is slidably connected to the outside of the sphere (2).

5. The mechanical seal structure of a three-way valve according to claim 2, characterized in that, The outer side of the valve stem (3) is rotatably connected to the inner side of the fixing ring (601).

6. The mechanical seal structure of a three-way valve according to claim 2, characterized in that, A sliding hole is provided at the middle position of the left end of the handle (4). A limiting groove is provided at the four corners of the sliding hole on the left end of the handle (4). The lower end of the second spring (603) is fixedly connected to the upper side of the left end of the handle (4). The outer side of the upper end of the valve stem (3) is slidably connected to the inner side of the sliding hole. The outer side of the limiting rod (604) is slidably connected to the inner side of the limiting groove.

7. The mechanical seal structure of a three-way valve according to claim 2, characterized in that, The upper left, front and right ends of the fixing ring (601) are provided with slots, and the lower outer side of the card plate (605) is engaged with the inner side of the slot.

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