CN221922039U - Cage type single seat valve with convertible structure - Google Patents

Abstract

The utility model discloses a cage type single-seat valve with a convertible structure, which comprises a valve body, a valve cover, a valve head, a packing gland and a valve rod, wherein the valve cover, the valve head and the packing gland are sequentially arranged at the top of the valve body, the valve rod penetrating through and extending to the inside of the valve body is arranged at the top of the packing gland, a left cavity and a right cavity are arranged in the valve body, a sleeve is arranged in the valve body, symmetrically distributed windows are arranged on the outer side of the sleeve, a valve core capable of moving up and down in the sleeve is arranged on the outer side of the valve rod, and a balancing hole penetrating longitudinally is formed in the valve core. The structural design through balance hole and branch hole makes the space at left cavity and right cavity and case top form the intercommunication, adjusts the plug bolt and carries out selective shutoff sealing as required, makes it can be used for different case structures, increases the interchangeability of part, reduces stock part kind, and structure selection type error condition can be timely effectual remedy and adjustment.

Description

A cage-type single-seat valve with convertible structure

Technical Field

The utility model relates to the technical field of a cage-type single-seat valve accessory structure with a convertible structure.

Background Art

There are several structural categories of control valves, including cage-type balanced control valves, single-seat control valves, and cage-type single-seat control valves. Usually, these types of control valves have different structures and their parts cannot be interchanged. Since cage-type balanced control valves have lower requirements for actuator thrust, they can be used in most high-pressure occasions, but there will be certain internal leakage, especially in large-diameter and high-pressure situations. In some working conditions, due to inaccurate technical parameters, errors in structural selection are often caused. Cage-type balanced structures are used in situations that require tight closure, or cage-type single-seat structures are selected when the tightness requirements are not high but the actuator thrust is small and the pressure is high. In order to reduce costs and inventory stocking quantities and make up for selection errors caused by inaccurate technical parameters, it is necessary to propose a universal component structure.

Utility Model Content

The utility model aims to provide a cage-type single-seat valve with a convertible structure to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions:

A cage-type single-seat valve with a convertible structure comprises a valve body, a valve cover, a valve head, a packing gland and a valve stem. The valve cover, the valve head and the packing gland are sequentially installed on the top of the valve body. A valve stem penetrating through and extending into the valve body is arranged on the top of the packing gland. A left chamber and a right chamber are arranged inside the valve body. A sleeve is arranged inside the valve body. A symmetrically distributed window is arranged on the outside of the sleeve. A valve core capable of moving up and down in the sleeve is installed on the outside of the valve stem. A balancing hole penetrating longitudinally is arranged on the valve core. A branch hole connecting the window with the balancing hole is also arranged on the valve core. The balancing hole and the branch hole are connected in a "├" shape. Plug bolts can be installed in the balancing hole and the branch hole.

As a further solution of the utility model: the plug bolt is threadedly connected in the branch hole to seal the branch hole, and the fluid flows from the left chamber through the balance hole to the top of the valve core to balance the pressure.

As a further solution of the utility model: the plug bolt is threadedly connected to the bottom of the balancing hole to seal the bottom end of the balancing hole, and the fluid enters from the right chamber through the branch hole and flows from the balancing hole to the top of the valve core to balance the pressure.

As a further solution of the utility model: the balancing holes and the support holes where the plug bolts are installed are set as threaded holes, and countersunk holes are opened, and the plug bolts are sunk into the countersunk holes when installed inside.

As a further solution of the utility model: a sealing gasket is installed between the bottom of the sleeve and the valve body.

Compared with the prior art, the beneficial effects of the utility model are:

The cage-type single-seat valve with convertible structure forms a connection between the left chamber, the right chamber and the space on the top of the valve core through the structural design of the balance hole and the branch hole. The plug bolt can be adjusted according to the need for selective plugging and sealing, so that it can be used for different valve core structures, increase the interchangeability of parts, reduce the types of inventory parts, and make timely and effective compensation and adjustments for structural selection errors.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a prior art schematic diagram of a cage-type balanced regulating valve in a cage-type single-seat valve with a convertible structure;

FIG2 is a schematic structural diagram of a cage-type balanced regulating valve in a cage-type single-seat valve with a convertible structure;

FIG. 3 is a schematic structural diagram of a single-seat regulating valve in a cage-type single-seat valve with a convertible structure.

In the figure: 1. valve body; 2. valve cover; 3. valve head; 4. packing gland; 5. valve stem; 6. left chamber; 7. right chamber; 8. sleeve; 9. window; 10. sealing gasket; 11. valve core; 12. sealing support hole; 13. balancing hole; 14. plug bolt.

DETAILED DESCRIPTION

Please refer to Figures 1 to 3. In the embodiment of the utility model, a cage-type single-seat valve with a convertible structure includes a valve body 1, a valve cover 2, a valve head 3, a packing gland 4 and a valve stem 5. The valve cover 2, the valve head 3 and the packing gland 4 are installed on the top of the valve body 1 in sequence. The top of the packing gland 4 is provided with a valve stem 5 that penetrates and extends into the interior of the valve body 1. The interior of the valve body 1 is provided with a left chamber 6 and a right chamber 7. The interior of the valve body 1 is provided with a sleeve 8. A sealing gasket 10 is installed between the bottom of the sleeve 8 and the valve body 1. The outer side of the sleeve 8 is provided with symmetrically distributed windows 9. The outer side of the valve stem 5 is provided with a valve core 11 that can move up and down in the sleeve 8. A balancing hole 13 running longitudinally through the valve core 11 is provided on the valve core 11. A branch hole 12 connecting the window 9 with the balancing hole 13 is also provided on the valve core 11. The balancing hole 13 and the branch hole 12 are connected in a "├" shape. Plug bolts 14 can be installed in the balancing hole 13 and the branch hole 12. The structural design of the balancing hole 13 and the branch hole 12 enables the left chamber 6 and the right chamber 7 to be connected with the space at the top of the valve core 11. The plug bolts 14 are used for selective plugging and sealing, so that it can be used for different valve core structures, increase the interchangeability of parts, reduce the types of inventory parts, and make timely and effective compensation and adjustments for structural selection errors.

In a preferred embodiment, the plug bolt 14 is threadedly connected in the branch hole 12 to seal the branch hole 12, and the fluid flows from the left chamber 6 through the balancing hole 13 to the top of the valve core 11 to balance the pressure. It is suitable for a balanced regulating valve. When the valve core 11 moves downward and closes, the fluid in the left chamber 6 will enter the top of the valve core 11 through the balancing hole 13 to balance the pressure. When the valve core 11 moves upward and closes, the fluid at the top of the valve core 11 will enter the right chamber 7 through the balancing hole 13 to balance the pressure.

In a preferred embodiment, the plug bolt 14 is threadedly connected to the bottom of the balancing hole 13, sealing the bottom end of the balancing hole 13, and the fluid enters from the right chamber 7 through the branch hole 12 and flows from the balancing hole 13 to the top of the valve core 11 to balance the pressure. It is suitable for a single-seat structure regulating valve. When the valve core 11 moves downward and closes, the fluid in the right chamber 7 enters through the branch hole 12 and flows from the balancing hole 13 to the top of the valve core 11 to balance the pressure. When the valve core 11 moves upward and closes, the fluid at the top of the valve core 11 will enter the right chamber 7 through the balancing hole 13 to balance the pressure.

In a preferred embodiment, the balancing hole 13 and the branch hole 12 where the plug bolt 14 is installed are set as threaded holes, and countersunk holes are opened. The plug bolt 14 is sunk into the countersunk hole when installed inside. The threaded connection method has good sealing performance, and can be combined with sealing structures such as gaskets to enhance its sealing effect. Since the valve core 11 needs to move up and down inside the sleeve 8, a countersunk hole structure is set to reduce the wear of the plug bolt 14 on the sleeve 8, resulting in a decrease in sealing performance.

It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims (5)

1. The utility model provides a cage-type single seat valve of convertible structure, includes valve body (1), valve gap (2), valve head (3), gland (4) and valve rod (5), valve gap (2), valve head (3) and gland (4) are installed in proper order at the top of valve body (1), and the top of gland (4) is provided with runs through and extends to valve rod (5) inside valve body (1), and valve body (1) inside is provided with left cavity (6) and right cavity (7), a serial communication port, valve body (1) inside is provided with sleeve (8), and window (9) of symmetric distribution have been seted up in the outside of sleeve (8), and case (11) that can reciprocate in sleeve (8) are installed in the valve rod (5) outside, and still set up on case (11) and be equipped with balanced hole (12) with window (9) and balanced hole (13) intercommunication, balanced hole (13) are "shape intercommunication with branch hole (12), but install plug (14) in balanced hole (13) and the branch hole (12).

2. A cage-type single seat valve of convertible construction according to claim 1, wherein the plug bolt (14) is screwed into the branch hole (12), sealing the branch hole (12), and fluid flows from the left chamber (6) to the top of the valve core (11) through the balance hole (13) to balance the pressure.

3. The cage-type single-seat valve with the convertible structure according to claim 1, wherein the plug bolt (14) is in threaded connection with the bottom of the balance hole (13), the bottom end of the balance hole (13) is sealed, and fluid flows from the right chamber (7) to the top of the valve core (11) through the branch hole (12) to balance pressure.

4. A cage-type single-seat valve with a convertible structure according to any one of claims 1-3, characterized in that the balance hole (13) and the branch hole (12) are provided with threaded holes at the position where the plug bolt (14) is arranged, and are provided with counter bores, and the plug bolt (14) is sunk into the counter bores when being arranged inside.

5. A cage-type single-seat valve of convertible construction according to claim 1, characterized in that a sealing gasket (10) is mounted between the bottom of the sleeve (8) and the valve body (1).