Balanced assembly and full-bore two-way sealed balanced regulating valve

Abstract

The utility model provides a balanced type assembly and a full-bore bidirectional sealing balanced type regulating valve. The balanced type assembly comprises a jacket, an energy storage ring and a back pressure ring, the two ends of the jacket respectively extend outwards to form jacket lips, the front end of the jacket lip on each side is provided with an opening, an energy storage ring is clamped in the opening, and the jacket lips on the two sides are symmetrically arranged relative to the center of the jacket; the energy storage ring is an elastic body, and the energy storage ring deforms after being pressed and expands the jacket lip towards the periphery; a back pressure ring is arranged at the opening position of the jacket lip on each side, and the end face of one side of the back pressure ring is connected with the energy storage ring in a sealed mode. According to the balance type assembly, the sealing effect of bidirectional flowing of media in the valve can be achieved through the double-end piston effect, the problem of backflow or leakage of the media is effectively solved, and the balance type assembly can be suitable for more severe working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve design production technical field especially, relates to a balanced assembly and full bore bidirectional sealing balanced regulating valve. BACKGROUND

[0002] The regulating valve is an important execution unit instrument in the industrial automation process control. According to the change of control signal, the regulating valve changes the flow area between valve core and valve seat, thereby regulating the flow, pressure, temperature and other process parameters of cut-off, effectively applicable to medium control in circulating water backwater pipeline device. In special circumstances, the regulating valve can also be used as a cut-off valve.

[0003] The current regulating valve designs the balance ring on the gap or flow passage between the valve core and the valve seat. When the medium flows through the valve and generates a pressure difference, the balance ring begins to respond to the change and balances the pressure by changing the gap or flow resistance between the valve core and the valve seat, thereby ensuring the stable operation of the valve. In the closed state of the valve, the close cooperation of the balance ring with the valve core and the valve seat can effectively reduce the leakage of the valve in the closed state.

[0004] However, the existing balance ring cannot meet the use requirements of high pressure, dynamic and many impurities in the medium under harsh working conditions. Therefore, it is necessary to further design the balance ring to have effective bidirectional sealing effect and design a balanced regulating valve that can better meet various harsh working conditions. SUMMARY

[0005] The technical problem to be solved by the utility model is that in order to overcome the deficiencies of the prior art, the utility model provides a balanced assembly and a balanced regulating valve with full bore bidirectional sealing. The double-head piston effect of the balanced assembly can realize the sealing effect of bidirectional flow of the medium in the valve, effectively avoid the problem of medium backflow or leakage, and can be applied to more harsh working conditions.

[0006] The technical scheme adopted by the utility model to solve the technical problem is: a balanced assembly, including a jacket, an energy storage ring and a back pressure ring, the jacket extends outward at both ends and has a jacket lip, the front end of the jacket lip on each side is designed as an opening, an energy storage ring is clamped in the opening, and the jacket lips on both sides are symmetrically arranged relative to the center of the jacket, the energy storage ring is an elastic body, the energy storage ring deforms after being pressed and spreads the jacket lips outward, and the opening position of each jacket lip is provided with a back pressure ring, and one side end face of the back pressure ring is in sealing connection with the energy storage ring.

[0007] In this solution, a resilient energy storage ring is clamped within the jacket, and a back-pressure ring is designed at the open end of the jacket. When force is applied to the back-pressure ring at one end of the jacket, it squeezes the energy storage ring. The accumulated energy causes the ring to deform, causing the lip of the jacket holding it to also deform and expand outward, thus creating a tight seal between the jacket lip and the external component. Furthermore, the jacket's dual-end symmetrical design gives the balanced assembly a radial dual-piston effect, effectively accommodating bidirectional sealing.

[0008] Furthermore, to prevent seizure within the balanced assembly under high-temperature and high-pressure conditions, the back-pressure ring includes a planar portion and a back-pressure protrusion protruding from one end face of the planar portion. When the planar portion is pressurized, the back-pressure protrusion seals the energy storage ring at the corresponding jacket opening. Under pressure, the material of the energy storage ring of the balanced assembly easily flows into the interlocking gap between the jacket lip and the energy storage ring, and dynamic reciprocating motion increases the interlocking. Under static conditions, when the pressure, temperature, and interlocking gap are below certain limits, once the pressure generated by friction in the interlocking gap equals the system pressure, the interlocking stops, preventing seizure.

[0009] Furthermore, the jacket is a polytetrafluoroethylene jacket. Polytetrafluoroethylene has the characteristics of high temperature resistance and extremely low friction coefficient, is resistant to acids and alkalis, and various organic solvents, has excellent chemical stability and mechanical toughness, and is effectively applicable to the main body of the valve seal.

[0010] Furthermore, the energy storage ring is a metal spring ring. When used as a sealing element, when installed in a sealing groove, the spring ring is compressed, forcing the jacket lip to adhere tightly to the sealing groove, thereby forming a seal. The spring ring provides permanent elastic force to the jacket and compensates for material wear and misalignment or eccentricity of mating parts.

[0011] A full-diameter, bidirectionally sealed balanced regulating valve comprises a valve body, an upper valve cover, a valve core assembly and a sleeve. The valve body has a flow channel inlet and a flow channel outlet. The upper valve cover is fixed on the valve body. The sleeve is fixed between the upper valve cover and the inner cavity of the valve body. The valve core assembly is arranged in the sleeve. A sealing groove is provided on the circumferential outer wall of the valve core assembly. The above-mentioned balanced assembly is arranged in the sealing groove. After the energy storage ring of the balanced assembly is compressed, it deforms to push the jacket lip outward, and the outer wall of the jacket lip is sealed with the outer wall of the valve core assembly and the inner wall of the sleeve respectively.

[0012] Furthermore, the valve body is provided with a valve seat at a sealing connection location corresponding to the sleeve. The valve body's flow channel inlet, flow channel outlet, valve seat inner hole, and sleeve inner hole all have the same diameter. The full-bore valve has a uniform flow channel width, resulting in minimal pressure loss, lower energy consumption, and greater flow capacity.

[0013] The utility model discloses a beneficial effect is, the utility model provides a kind of balanced assembly and full bore bidirectional sealing balanced regulating valve, and structure design is reasonable and effective.In balanced assembly, the double-end type's jacket is used to hold energy storage ring respectively, along medium flow direction, the sealing of pressure deformation using energy storage ring is realized, different flow direction medium in valve can be effectively coped with bidirectional sealing.Utilize the balanced regulating valve of full bore bidirectional sealing of balanced assembly above-mentioned, then can withstand higher working pressure difference, with higher dynamic stability, while full bore valve pressure loss is small, and flow capacity is larger, and energy loss is smaller. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further described below in connection with the drawings and embodiment.

[0015] Figure 1 It is the structure schematic view of balanced assembly in the utility model.

[0016] Figure 2 It is the structure schematic view of balanced assembly in the utility model after installation to sealing groove.

[0017] Figure 3 It is the structure schematic view of balanced regulating valve in the utility model.

[0018] Figure 4 It is the schematic diagram of balanced regulating valve medium forward flow in the utility model (arrow direction is medium flow direction).

[0019] Figure 5 It is Figure 4 the enlarged schematic view of place A in.

[0020] Figure 6 It is the schematic diagram of balanced regulating valve medium backflow in the utility model (arrow direction is medium flow direction).

[0021] Figure 7 It is Figure 6 the enlarged schematic view of place B in.

[0022] In the drawing, 1, plane part 2, back pressure protrusion 3, energy storage ring 4, jacket lip 5, jacket 6, sealing groove 7, upper valve cover 8, sleeve 9, balanced assembly 10, valve seat 11, valve body 12, valve core assembly. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention only in a schematic manner. Therefore, they only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) may be used solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0024] like Figure 1 The balanced component shown is an embodiment of the balanced component of the present invention.

[0025] This balanced assembly comprises a jacket, two energy storage rings 3, and two back-pressure rings. The jacket 5 features a symmetrical double-ended structure, with jacket lips 4 extending outward from each end. Each jacket lip 4 has an open front end, within which an energy storage ring 3 is clamped. A back-pressure ring is located at the opening of each jacket lip 4, with one end face sealed to the energy storage ring 3.

[0026] The back-pressure ring includes a flat portion 1 and a back-pressure protrusion 2 protruding from one end face of the flat portion 1. When the flat portion 1 is pressurized, the back-pressure protrusion 2 is sealed and connected to the energy storage ring 3 at the opening of the corresponding side jacket. In this embodiment, under the action of pressure, the material of the energy storage ring 3 of the balanced component easily flows into the bite gap between the jacket lip 4 and the energy storage ring 3, and the dynamic reciprocating motion increases the bite. Under static conditions, when the pressure, temperature and bite gap are below a certain limit, the bite will stop once the pressure generated by the friction in the bite gap is equal to the system pressure. The design of the back-pressure ring helps to prevent bite from occurring in the balanced component under high temperature and high pressure conditions, which leads to failure of the elastic energy storage seal.

[0027] In the specific selection, the jacket 5 is made of polytetrafluoroethylene or other polymer materials. Polytetrafluoroethylene has the characteristics of high temperature resistance and extremely low friction coefficient. It is resistant to acids and alkalis, and various organic solvents. It has excellent chemical stability and mechanical toughness, and is resistant to high temperature and high pressure corrosion. It can be effectively applied to the sealing body of the valve. The energy storage ring 3 is made of corrosion-resistant metal material to make a metal energy storage spring ring. The energy storage ring 3 is an elastomer. When it is compressed, it deforms and stretches the jacket lip 4 toward the periphery. When used as a sealing element, the balanced component is installed in the sealing groove 6. After the back pressure ring is pressurized, the pressure is transmitted to the energy storage ring 3 through the back pressure protrusion 2. The energy storage ring 3 is pressurized, causing the jacket lip 4 to fit tightly against the sealing groove 6, thereby forming a seal. The spring ring provides permanent elastic force for the jacket 5 and compensates for material wear and the offset or eccentricity of mating parts. When serving as a seal between the valve core and the sleeve 8 of the valve, the inlet and outlet pressures of the valve will also assist the jacket in storing energy. With the assistance of the inlet and outlet pressures of the valve, the energy storage ring stores energy, and effective sealing can be achieved regardless of whether the valve system provides high or low pressure.

[0028] The traditional O-ring sealing structure may cause the O-ring to twist or screw failure during installation and use. Figure 2 As shown, this embodiment employs a double-ended jacket 5 design. When the jacket 5 is installed in the sealing groove 6, the back pressure rings at both ends receive force and transfer the accumulated force inward, driving the jacket lip 4 to expand outward. Relative to the jacket 5, the expansion radially extends from the center of the jacket 5. Simultaneously, the two ends are symmetrical, creating a double-piston effect that provides bidirectional sealing and prevents backflow and leakage of the medium.

[0029] Specifically, such as Figure 4 and Figure 5 As shown, when the valve is closed and the medium flows into the valve normally, the impact balance component 9 is located at the back pressure ring above, and the back pressure ring presses against the spring ring located above. The jacket lip 4 at the upper spring ring is stretched open, sealing the gap between the valve core and the sleeve 8, and the valve achieves a good sealing effect.

[0030] like Figure 6 and Figure 7 As shown, when the medium flows back into the valve, the impact balance component 9 is located at the back pressure ring below, and the back pressure ring presses toward the lower end of the double-headed spring coil. The lower end spring coil stores energy, and the jacket lip 4 at the lower end spring coil is stretched open, sealing the gap between the valve core component 12 and the sleeve 8, so that the valve can also achieve a good sealing effect.

[0031] In this way, the valve can achieve radial double-piston effect sealing in two directions, effectively avoiding the problem of medium backflow or leakage, and is effectively suitable for bidirectional sealing.

[0032] On this basis, the present invention also provides Figure 3 A full-bore, bidirectionally sealed balanced regulating valve is shown.

[0033] This balanced regulating valve includes a valve body 11, an upper valve cover 7, a valve core assembly 12, and a sleeve 8. The valve body 11 has a flow channel inlet and a flow channel outlet. The upper valve cover 7 is fixed to the valve body 11, and the sleeve 8 is fixed between the upper valve cover 7 and the inner cavity of the valve body 11. The valve core assembly 12 is disposed within the sleeve 8. The valve body 11 is provided with a valve seat 10 at a sealing connection position corresponding to the sleeve 8. The flow channel inlet diameter φA and flow channel outlet diameter φB of the valve body 11, the inner hole diameter φC of the valve seat 10, and the inner hole φD of the sleeve 8 are all the same.

[0034] A sealing groove 6 is provided on the circumferential outer wall of the valve core assembly 12, and the above-mentioned balanced assembly is arranged in the sealing groove 6. When the energy storage ring of the balanced assembly is compressed, it deforms to push the jacket lip 4 outward, and the outer wall of the jacket lip 4 is sealed and connected to the outer wall of the valve core assembly 12 and the inner wall of the sleeve 8 respectively.

[0035] The balanced regulating valve with the structural design is designed with full-bore structure, the flow channel is designed as equal width, the internal flow channel has sufficient size to make the flow pass through without obvious restriction, compared with the reduced-bore valve, the pressure loss is small, the energy loss is smaller, and the flow capacity is larger, and can be used in on-off and off-circuit working conditions. On the basis of the full-bore valve, the balanced assembly is used for sealing between the valve core assembly 12 and the sleeve 8, so that the valve can withstand higher working pressure difference, and has higher dynamic stability. In the medium adaptation degree, the balanced assembly can better adapt to the occasion that the fluid contains particle impurities, and the valve core assembly 12 is not easy to be stuck.

[0036] Through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A balanced component, characterized in that: It includes a jacket (5), an energy storage ring (3) and a back pressure ring; The two ends of the jacket (5) are respectively extended outwards to have jacket lips (4), the front end of the jacket lip (4) on each side is designed to be open, and an energy storage ring (3) is clamped in the opening, and the jacket lips (4) on both sides are symmetrically arranged relative to the center of the jacket; The energy storage ring (3) is an elastic body, and the energy storage ring (3) is deformed after being compressed and stretches the jacket lip (4) toward the periphery; A back pressure ring is provided at the opening position of the jacket lip (4) on each side, and one end face of the back pressure ring is sealedly connected to the energy storage ring (3).

2. A balanced component according to claim 1, characterized in that: The back pressure ring comprises a plane portion (1) and a back pressure protrusion (2) protruding from one end face of the plane portion (1). When the plane portion (1) is pressurized, the back pressure protrusion (2) is sealed and connected to the energy storage ring (3) at the opening of the corresponding side jacket.

3. A balanced component according to claim 1, characterized in that: The jacket (5) is a polytetrafluoroethylene jacket (5).

4. A balanced component according to claim 1, characterized in that: The energy storage ring (3) is a spring ring made of metal.

5. A full-bore, bidirectionally sealed balanced regulating valve, comprising a valve body (11), an upper valve cover (7), a valve core assembly (12) and a sleeve (8), wherein the valve body (11) has a flow channel inlet and a flow channel outlet, the upper valve cover (7) is fixed to the valve body (11), the sleeve (8) is fixed between the upper valve cover (7) and the inner cavity of the valve body (11), and the valve core assembly (12) is arranged in the sleeve (8), characterized in that: A sealing groove is provided on the circumferential outer wall of the valve core assembly (12), and a balanced assembly as described in any one of claims 1 to 4 is provided in the sealing groove. When the energy storage ring (3) of the balanced assembly is compressed, it deforms to push the jacket lip (4) outward, and the outer wall of the jacket lip (4) is sealed with the outer wall of the valve core assembly (12) and the inner wall of the sleeve (8), respectively.

6. A full-bore, bidirectionally sealed balanced regulating valve according to claim 5, characterized in that: The valve body (11) is provided with a valve seat (10) at a sealing connection position corresponding to the sleeve (8), and the diameters of the flow channel inlet, flow channel outlet, inner hole of the valve seat (10), and inner hole of the sleeve (8) of the valve body (11) are all the same.

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