A three-way stopcock valve

Abstract

The utility model provides a tee plug valve, including valve body and valve core, the upper and lower both ends of valve body are open, the upper and lower both ends of valve body are respectively sheathed with a sealing sleeve, two sealing sleeves are located in the abutment of valve body one end, two sealing sleeve periphery walls are respectively set up and are located in the through -flow gap of both opposite ends, two sealing sleeve on the through -flow gap constitutes a complete circular through -flow hole, the valve core is sheathed in valve body and is located in the space surrounded by two sealing sleeves, in the utility model, through the screwing connection of upper cover and lower cover on the both ends of valve body, then sheathing two sealing sleeves in valve body, the valve core is located in the cavity surrounded by two sealing sleeves, removes upper cover and lower cover, can remove corresponding sealing sleeve from the both ends of valve body respectively, because the area of single sealing sleeve and valve body contact is small, so it is more labor -saving to remove the sealing sleeve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a three-way plug valve. Background Technology

[0002] A plug valve is a type of valve that opens or closes by rotating a certain angle to connect or separate the channel on the valve core from the channel on the valve body. It has a simple structure, good flow control effect, and low turning resistance, and is widely used in low-pressure heating, ventilation, and water supply fields. However, after a period of use, the sealing ring of the plug valve will age, resulting in a poor sealing effect and easy leakage.

[0003] The existing plug valve mainly includes a valve body, a valve core, and a sealing sleeve. The sealing sleeve is fitted between the valve body and the valve core. The valve core has a flow channel. One end of the valve body is a blind end, and the other end is screwed to a sealing cap. When the sealing sleeve needs to be replaced, the sealing cap at one end of the valve body needs to be removed. Due to the aging of the sealing sleeve and its tight fit with the valve body, disassembly is relatively difficult, resulting in the problem of difficulty in replacing the sealing sleeve.

[0004] Therefore, this utility model provides a three-way plug valve. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a three-way plug valve to solve the problems mentioned in the background art. This utility model has the advantage of making it easier to replace the sealing sleeve.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a three-way plug valve, comprising a valve body and a valve core, wherein the valve body is open at both the upper and lower ends, and a sealing sleeve is respectively fitted at the upper and lower ends of the valve body, the two sealing sleeves abutting at one end of the valve body, and flow notches are respectively opened on the outer peripheral walls of the two sealing sleeves at their opposite ends, the flow notches on the two sealing sleeves forming a complete circular flow hole, the valve core is fitted inside the valve body and located in the space enclosed by the two sealing sleeves, an upper cover and a lower cover are respectively screwed onto the upper and lower ends of the valve body, and a valve stem penetrating the upper cover is fixedly connected to the top of the valve core.

[0007] Furthermore, the valve core has a double-headed conical structure with its large end located in the middle, the inner circumferential wall of the sealing sleeve is a conical wall structure adapted to the outer circumferential wall of the valve core, and a valve passage adapted to the circular flow hole is opened in the middle of the valve core.

[0008] Furthermore, the valve body has external threads at both ends that are screwed into the upper and lower covers respectively, and the outer peripheral walls of the upper and lower covers are fixedly fitted with external hexagonal sleeves.

[0009] Furthermore, a pressure sleeve with one end opposite to the sealing sleeve is fixedly connected to the inner side of both the upper and lower covers.

[0010] Furthermore, one end of the sealing sleeve is provided with an annular pressure groove that is inserted into the pressure sleeve.

[0011] Furthermore, an upper limit tube is fixedly connected to the middle of the upper cover, and the upper limit tube is sleeved on the outside of the valve stem.

[0012] Furthermore, one end of the valve stem is bolted to a screwdriver.

[0013] The beneficial effects of this utility model are as follows: In this utility model, an upper and lower cover are screwed together at both ends of the valve body, and then two sealing sleeves are fitted inside the valve body. The valve core is located in the cavity formed by the two sealing sleeves. By removing the upper and lower cover, the corresponding sealing sleeves can be removed from both ends of the valve body. Since the contact area between a single sealing sleeve and the valve body is small, it is easier to remove the sealing sleeves.

[0014] In this invention, by setting the valve core to a double-headed conical structure and setting the inner wall of the sealing sleeve to a conical wall structure that matches the outer conical surface on the valve core, the sealing sleeve can be easily pushed out of the valve body by pushing the valve core up and down when the upper and lower sealing caps are removed, making the operation of removing the sealing sleeve simpler. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a three-way plug valve after an explosion. Figure 2 for Figure 1 A diagram at the bottom; Figure 3 for Figure 1 A schematic diagram of the assembled structure; In the diagram: 1. Valve body; 11. External thread; 2. Valve core; 21. Valve passage; 3. Sealing sleeve; 31. Flow notch; 32. Annular groove; 5. Circular flow hole; 6. Upper cover; 61. Upper limit tube; 7. Lower cover; 8. Valve stem; 81. Rotating disc; 9. External hexagonal sleeve; 101. Pressure sleeve. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] Please see Figures 1 to 3This utility model provides a technical solution: a three-way plug valve, which has a T-shaped structure and includes a valve body 1 and a valve core 2. The valve body 1 has openings at both the upper and lower ends, and a sealing sleeve 3 is respectively fitted at the upper and lower ends of the valve body 1. The two sealing sleeves 3 abut against each other at one end of the valve body 1. The outer peripheral walls of the two sealing sleeves 3 are respectively provided with flow notches 31 located at opposite ends. The flow notches 31 on the two sealing sleeves 3 form a complete circular flow hole 5. During installation, the circular flow hole 5 is aligned with the inner cavity of the three connecting pipes on the outer peripheral wall of the valve body 1.

[0018] The valve core 2 is fitted inside the valve body 1 and located in the space enclosed by the two sealing sleeves 3. The outer peripheral wall of the valve core 2 and the inner wall of the two sealing sleeves 3 abut against each other to achieve a sealing fit. By rotating the valve core 2, the opening and closing of the two-way or three-way valve on the three-way valve can be controlled.

[0019] The valve body 1 has an upper cover 6 and a lower cover 7 screwed onto its upper and lower ends, respectively. The function of the upper cover 6 and the lower cover 7 is to press the sealing sleeve 3 in the inner cavity of the valve body 1, so that the opposite surfaces of the two sealing sleeves 3 are in pressure contact, thus preventing leakage at the joint. When the sealing sleeve 3 needs to be replaced, the upper cover 6 and the lower cover 7 are removed, and then the sealing sleeves 3 at both ends of the valve body 1 are picked out in the opposite direction using a tool. Then, new sealing sleeves 3 are inserted into both ends of the valve body 1, and finally the upper cover 6 and the lower cover 7 are installed to complete the replacement of the sealing sleeve 3.

[0020] The valve core 2 has a valve stem 8 fixedly connected to its top, which passes through the upper cover 6. Specifically, an upper limit tube 61 is fixedly connected to the middle of the upper cover 6. The upper limit tube 61 is sleeved on the outside of the valve stem 8. The upper limit tube 61 and the valve stem 8 can be connected by an overfit, which can effectively prevent the valve core 2 from swinging. The valve stem 8 is the transmission component that drives the valve core 2 to rotate. In use, a rotating disc 81 can be bolted to one end of the valve stem 8. The rotating disc 81 is a handheld component.

[0021] In this embodiment, the valve core 2 has a double-ended conical structure with its large end located in the middle. The inner circumferential wall of the sealing sleeve 3 is a conical wall structure that matches the outer circumferential wall of the valve core 2. Thus, when the two sealing sleeves 3 are pressed against each other, their inner conical walls will press against the outer conical wall of the valve core 2, thereby ensuring a tight fit between the sealing sleeve 3 and the cavity wall of the valve body 1 and the outer conical wall of the valve core 2, thus guaranteeing the sealing degree and also limiting the axial movement of the valve core 2. The valve core 2 has a valve passage 21 in the middle that matches the circular flow hole 5. The valve passage 21 is L-shaped or T-shaped. When it is T-shaped, the three-way plug valve can achieve a state where all three ports are simultaneously connected.

[0022] In this embodiment, the valve body 1 has external threads 11 at both ends that are screwed into the upper cover 6 and the lower cover 7 respectively. The outer peripheral walls of the upper cover 6 and the lower cover 7 are fixedly fitted with external hexagonal sleeves 9. The external hexagonal sleeves 9 make it easy for maintenance personnel to hold two wrenches and twist the upper cover 6 and the lower cover 7 in opposite directions, so that one or two of the upper cover 6 and the lower cover 7 can be easily loosened. When one of them is loosened, the other can also be easily disassembled due to the reduced pressure.

[0023] In this embodiment, a pressure sleeve 101 with one end opposite to the sealing sleeve 3 is fixedly connected to the inner side of both the upper cover 6 and the lower cover 7. When the upper cover 6 and the lower cover 7 are tightened, the pressure sleeve 101 can apply an axial pushing force to the corresponding sealing sleeve 3, so that the two sealing sleeves 3 can be in close contact. One end of the sealing sleeve 3 is provided with an annular pressure groove 32 that inserts into the pressure sleeve 101. The annular pressure groove 32 can effectively prevent the sealing sleeve 3 from deforming and misaligning after being subjected to force.

[0024] Working principle: When it is necessary to replace the sealing sleeve 3, use the two matching wrenches to connect with the outer hexagonal sleeves 9 on the upper cover 6 and the lower cover 7 respectively. Then, turn the two wrenches in opposite directions to loosen the upper cover 6 and the lower cover 7. After removing the upper cover 6 and the lower cover 7, remove the screw plate 81. Manually hold the valve stem 8 and push it up and down. At this time, the valve core 2 will use its outer conical wall to push the two sealing sleeves 3 out in opposite directions. Remove the worn sealing sleeve 3 and put the two new sealing sleeves 3 back onto both ends of the valve body 1. Then, reset the upper cover 6 and the lower cover 7 and tighten them. Finally, install the screw plate 81 to complete the replacement operation of the sealing sleeve 3.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-way plug valve, comprising a valve body (1) and a valve core (2), characterized in that, The valve body (1) has openings at both the top and bottom. A sealing sleeve (3) is fitted on each of the top and bottom ends of the valve body (1). The two sealing sleeves (3) abut against each other at one end of the valve body (1). The outer peripheral walls of the two sealing sleeves (3) are respectively provided with flow notches (31) located at opposite ends. The flow notches (31) on the two sealing sleeves (3) form a complete circular flow hole (5). The valve core (2) is fitted inside the valve body (1) and located between the two sealing sleeves. In the space enclosed by the sleeve (3), the upper and lower ends of the valve body (1) are respectively screwed with an upper cover (6) and a lower cover (7). The top of the valve core (2) is fixedly connected with a valve stem (8) that passes through the upper cover (6). The valve core (2) is a double-headed conical structure with its large end located in the middle. The inner circumferential wall of the sealing sleeve (3) is a conical wall structure that matches the outer circumferential wall of the valve core (2). The valve core (2) has a valve passage (21) in the middle that matches the circular flow hole (5).

2. A three-way plug valve according to claim 1, characterized in that: The valve body (1) has external threads (11) at both ends that are screwed into the upper cover (6) and the lower cover (7) respectively. The outer peripheral walls of the upper cover (6) and the lower cover (7) are fixedly fitted with external hexagonal sleeves (9).

3. A three-way plug valve according to claim 1, characterized in that: The inner sides of the upper cover (6) and the lower cover (7) are both fixedly connected to a pressure sleeve (101) with one end opposite to the sealing sleeve (3).

4. A three-way plug valve according to claim 3, characterized in that: One end of the sealing sleeve (3) is provided with an annular pressure groove (32) that is inserted into the pressure sleeve (101).

5. A three-way plug valve according to claim 1, characterized in that: The upper cover (6) is fixedly connected to the middle of the upper cover (6), and the upper cover (61) is sleeved on the outside of the valve stem (8).

6. A three-way plug valve according to claim 1, characterized in that: One end of the valve stem (8) is bolted to a rotary disc (81).

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