CN114791051A

CN114791051A - Throttle valve device

Info

Publication number: CN114791051A
Application number: CN202210446987.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-07-26
Anticipated expiration: 2042-04-26
Also published as: CN114791051B

Abstract

The invention discloses a throttle valve device, which comprises a valve body, wherein the valve body is provided with a valve port, an inlet and an outlet, the valve port can be communicated with the inlet and the outlet, and the valve body is provided with a valve cavity; still including setting up needle subassembly in the valve chamber, needle subassembly includes needle portion, bellows and fixed part, the fixed part is fixed in the valve body, one side of bellows with needle portion fixed connection, the opposite side of bellows with fixed part fixed connection, needle portion one of fixed part is provided with the balancing hole for the intercommunication the inner chamber of bellows with the valve chamber. The throttle valve device provided by the invention adopts the corrugated pipe to replace a spring, so that the noise in the product operation process can be greatly reduced.

Description

Throttle valve device

Technical Field

The invention relates to the technical field of fluid control, in particular to a throttling valve device.

Background

The compressor, the condenser, the throttle valve and the evaporator in the heat exchange system are called as four parts, wherein the throttle valve is arranged between the condenser and the evaporator, and the throttle valve can play the roles of throttling and reducing pressure, namely the functions of flow regulation and pressure regulation in the operation process of the heat exchange system.

At present, in a conventional throttling valve, the position of a valve needle is regulated and controlled by configuring a spring so as to regulate pressure and flow. However, the spring is prone to instability during use, which may cause noise in the product.

Disclosure of Invention

The invention aims to provide a throttle valve device, which adopts a corrugated pipe to replace a spring and can greatly reduce the noise in the operation process of a product.

In order to solve the technical problem, the invention provides a throttle valve device, which comprises a valve body, wherein the valve body is provided with a valve port, an inlet and an outlet, the valve port can be communicated with the inlet and the outlet, and the valve body is provided with a valve cavity; still including setting up needle subassembly in the valve chamber, needle subassembly includes needle portion, bellows and fixed part, the fixed part is fixed in the valve body, one side of bellows with needle portion fixed connection, the opposite side of bellows with fixed part fixed connection, needle portion one of fixed part is provided with the balancing hole for the intercommunication the inner chamber of bellows with the valve chamber.

By adopting the structure, the balance hole can be communicated with the inner cavity and the valve cavity of the corrugated pipe, and the fluid volume in the corrugated pipe can be balanced when the corrugated pipe is stretched, so that the stretching smoothness of the corrugated pipe is ensured; in an initial state, the corrugated pipe can generate acting force on the valve needle part so as to enable the valve needle part to be kept at an initial position enabling the valve port to have a set initial opening degree; in the use process, along with the increase of the fluid pressure at the inlet, the valve needle part can overcome the acting force of the corrugated pipe to displace in the valve cavity, so that the opening degree of the valve port is adjusted, and the technical purposes of pressure regulation and flow regulation are further realized.

Different from the conventional design, the corrugated pipe is adopted to replace a spring, the inner cavity of the corrugated pipe can form a buffer cavity, the stability is higher when the corrugated pipe is used in fluid, and the noise in the operation process of a product can be reduced to a greater extent.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a throttle valve apparatus provided in the present invention;

FIG. 2 is a schematic structural view of a valve pin assembly;

fig. 3 is a structural diagram of the valve seat.

The reference numerals in fig. 1-3 are illustrated as follows:

1 valve body, 11 first shell portion, 12 second shell portion, 13 valve seat, 131 constant diameter hole section, 132 gradually expanding hole section, 133 gradually reducing hole section, 14 inlet pipe, 141 inlet pipe, 15 outlet pipe, 151 outlet pipe;

2 valve needle assembly, 21 valve needle part, 211 balance hole, 212 limit part, 213 constant diameter section, 214 first tapered section, 215 second tapered section, 22 bellows, 23 fixing part, 231 bulge and 232 notch.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function, and do not denote any particular limitation as to order and/or importance.

Referring to fig. 1 to 3, fig. 1 is a schematic structural view of a throttle valve device according to an embodiment of the present invention, fig. 2 is a schematic structural view of a valve needle assembly, and fig. 3 is a schematic structural view of a valve seat.

As shown in fig. 1 and 2, the present invention provides a throttle valve device, comprising a valve body 1 and a valve needle assembly 2, wherein the valve body 1 is provided with a valve port, an inlet 141 and an outlet 151, the valve port can communicate the inlet 141 and the outlet 151 to realize the flow of fluid from the inlet 141 to the outlet 151; the valve body 1 is provided with a valve cavity in which the valve needle assembly 2 is arranged.

The needle assembly 2 includes a needle portion 21, a bellows 22, and a fixing portion 23, and the fixing portion 23 is mounted to the valve body 1 to form a fixing end of the needle assembly 2. The valve needle portion 21 is connected to the fixing portion 23 through the bellows 22, and one of the valve needle portion 21 and the fixing portion 23 is provided with a balance hole 211, and the balance hole 211 is used for communicating an inner cavity of the bellows 22 with a valve cavity to supplement or discharge fluid in the bellows 22 when the bellows 22 expands and contracts, so that the amount of fluid in the bellows 22 can be balanced. In an initial state, that is, when not put into use, the bellows 22 has an initial biasing force that can hold the valve needle portion 21 at an initial position at which the valve port has a set initial opening degree. After the valve is put into use, along with the increase of the fluid pressure at the inlet 141, the valve needle part 21 can overcome the initial pretightening force of the corrugated pipe 22 to displace in the valve cavity, so that the opening of the valve port is adjusted, and the functions of flow regulation and throttling and pressure reduction are further realized; in the process, the accumulated elastic force of the bellows 22 may increase, so that the bellows 22 may drive the valve needle portion 21 toward the initial position when the fluid pressure at the inlet 141 is reduced.

Different from the conventional design, the embodiment of the invention adopts the corrugated pipe 22 to replace a spring, and the inner cavity of the corrugated pipe 22 can form a buffer cavity, so that the stability is higher when the corrugated pipe is used in fluid, and the noise in the operation process of a product can be greatly reduced.

In a specific aspect, as shown in fig. 1, the fixing portion 23, the bellows 22, and the valve needle portion 21 may be sequentially arranged in a direction from the inlet 141 to the outlet 151, and the balance hole 211 may be provided to the valve needle portion 21. At this time, the balance hole 211 and the inner cavity of the bellows 22 may communicate with the outlet 151, that is, the pressure of the fluid inside the needle portion 21 is the pressure after throttling, and the pressure of the fluid outside the needle portion 21 is the pressure before throttling, so that the needle portion 21 may move in the valve cavity to adjust the opening degree of the valve port by the difference between the pressures before and after throttling.

Besides, the balance hole 211 may be disposed on the fixing portion 23, and the valve needle portion 21, the bellows 22, and the fixing portion 23 are sequentially arranged along the direction from the inlet 141 to the outlet 151, which all can achieve the technical purpose of adjusting the movement of the valve needle portion 21 in the valve cavity according to the pressure change of the fluid at the inlet 141.

The fixing portion 23 may be provided with a protrusion 231, and an end of the corrugated tube 22 may be sleeved on the protrusion 231 and connected to the protrusion 231, so that convenience in connecting the corrugated tube 22 and the fixing portion 23 may be improved; the specific connection mode can be bonding and the like. The protrusion 231 may be a bump disposed on the fixing portion 23; alternatively, as shown in fig. 2, the fixing portion 23 may be a plate-shaped member, and then, the plate-shaped member may be punched to punch the protrusion 231 thereon.

It is understood that the connection manner of the bellows 22 and the fixing portion 23 is not limited to the scheme of providing the protrusion 231, and other connection manners may be adopted between the bellows 22 and the fixing portion as long as the connection reliability can be ensured. For example, the fixing portion 23 may be provided with a mounting surface to which the bellows 22 is adhesively fixed, and this is also possible.

The valve needle portion 21 is in a column shape, and the bellows 22 may be sleeved on an end portion of the valve needle portion 21 and may be fixedly connected to the valve needle portion 21 by bonding or the like.

Further, as shown in fig. 2, the outer edge of the fixing portion 23 may be provided with a notch 232, so that the outer edge of the fixing portion 23 may be divided into several sheets arranged at intervals along the circumferential direction, and the notch 232 may be formed between two sheets adjacent to each other in the circumferential direction. During assembly, each sheet body can be connected with the inner wall of the valve body 1, the gap 232 and the inner wall of the valve body 1 can enclose to form a flow passage, and fluid can flow through the fixing portion 23 from the flow passage.

Alternatively, the fixing portion 23 may be provided with a flow hole, and the flow hole may form the flow passage.

The manner of connection of the fixing portion 23 to the valve body 1 is related to the structural form of the valve body 1. In the embodiment of the drawings, as shown in fig. 1, the valve body 1 may include a first shell portion 11 and a second shell portion 12, the first shell portion 11 and the second shell portion 12 may be butted, and the connection manner therebetween may be welding, screwing, flange connection, and the like. At this time, the fixing portion 23 may be installed at the butt joint of the first and second case portions 11 and 12 to crimp-fix the fixing portion 23 by the fixing of the first and second case portions 11 and 12. Alternatively, the fixing portion 23 may be attached to one of the first case portion 11 and the second case portion 12, and in the example of attachment to the second case portion 12, the fixing portion 23 may be fixed to the second case portion 12 by a caulking process.

In the embodiment of the present invention, the valve body 1 is configured to include the first and second shell portions 11 and 12, which are separated, so that the convenience of mounting the fixing portion 23 can be greatly improved.

Further, the valve body 1 may further include a valve seat 13, the valve seat 13 may be provided with a valve port, and the valve seat 13 may be connected to the second shell portion 12 by welding, screwing, flange connection, or the like. The aforementioned needle assembly 2 may be displaceable in particular within the second housing part 12 and the valve seat 13.

The valve body 1 may further include an inlet pipe 14 and an outlet pipe 15, the inlet pipe 14 may be coupled to the first shell portion 11, the outlet pipe 15 may be coupled to the valve seat 13, an end of the inlet pipe 14 remote from the first shell portion 11 may form an inlet 141, and an end of the outlet pipe 15 remote from the valve seat 13 may form an outlet 151. The connection of the inlet pipe 14 to the first housing portion 11 and the connection of the outlet pipe 15 to the valve seat 13 may be selected from among a screw connection, a welding, a flange connection, and the like, and in fact, whatever connection is adopted, so long as the reliability of the connection can be ensured.

Further, as shown in fig. 3, the valve seat 13 may be provided with a constant diameter hole section 131, a gradually expanding hole section 132 and a gradually reducing hole section 133, and both the gradually expanding hole section 132 and the gradually reducing hole section 133 may be connected to the constant diameter hole section 131; the gradually expanding hole section 132 refers to a hole section having a gradually increasing hole diameter in the flow direction of the fluid, and the gradually reducing hole section 133 refers to a hole section having a gradually decreasing hole diameter in the flow direction of the fluid. A diverging bore section 132 may be located downstream of the constant diameter bore section 131 for improving noise during fluid flow; a tapered bore section 133 may be located upstream of the constant diameter bore section 131 for guiding installation of the valve pin portion 21.

Any cross section of the constant diameter hole section 131 can be used as a valve port. Generally, the junction of the constant diameter bore section 131 and the tapered bore section 133 may serve as a valve port.

Further, the outer wall of the valve needle portion 21 may further be provided with a limiting portion 212, the inner wall of the valve body 1 may be provided with a limiting fitting portion, and the valve needle portion 21 and the valve port may be in clearance fit in both the axial direction and the radial direction when the limiting portion 212 and the limiting fitting portion are in axial abutment. Therefore, the direct impact of the valve needle part 21 on the valve port can be avoided, the shape of the valve port can be ensured, and the flow control effect can be ensured.

As shown in fig. 2 and with reference to fig. 1, in the solution of the drawings, the limiting portion 212 may be a protrusion disposed on an outer wall surface of the valve needle portion 21, and the limiting engagement portion may be an axial end surface of the valve seat 13, that is, the limiting portion 212 may axially abut against the valve needle portion 21.

The valve needle portion 21 may include a constant diameter section 213, a first tapered section 214 and a second tapered section 215, where the first tapered section 214 and the second tapered section 215 each taper in size in a radial direction along a fluid flow direction; wherein the first tapered section 214 may be located upstream of the constant diameter section 213 and connected to the constant diameter section 213, the second tapered section 215 may be located downstream of the constant diameter section 213 and connected to the constant diameter section 213, and the outer diameter of the constant diameter section 213 may be smaller than the inner diameter of the constant diameter hole section 131.

In the use state, the constant diameter section 213 and the second tapered section 215 can be inserted into the constant diameter hole section 131, and the opening degree of the valve port can be adjusted by adjusting the depth of the second tapered section 215 inserted into the constant diameter hole section 131. With reference to fig. 1 and 2, the first tapered section 214 is used to sense the pressure change of the fluid at the inlet 141 to adjust the position of the valve needle portion 21 in the valve cavity.

For example, when the system is in low-frequency operation, because the fluid pressure at the inlet 141 is small, the pressure difference between the front and the back of the valve needle portion 21 is small, and is not enough to overcome the initial pre-tightening force of the bellows 22, therefore, the valve needle portion 21 can be abutted against the valve seat 13 in the axial direction through the limiting portion 212, a small gap is formed between the valve needle portion 21 and the valve port, and the fluid flows out at a small flow rate; when the system is operated at a high frequency, because the fluid pressure at the inlet 141 is relatively high, the first tapered section 214 of the valve needle portion 21 senses the fluid pressure, and can drive the valve needle portion 21 to displace leftward (as viewed in fig. 1), the compression amount of the bellows 22 increases, and the fluid can flow out from the valve port at a large flow rate.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and embellishments can be made without departing from the principle of the present invention, and these modifications and embellishments should also be regarded as the protection scope of the present invention.

Claims

1. A throttle valve device comprises a valve body (1), wherein the valve body (1) is provided with a valve port, an inlet (141) and an outlet (151), the valve port can be communicated with the inlet (141) and the outlet (151), the valve body (1) is provided with a valve cavity, characterized in that the device also comprises a valve needle component (2) arranged in the valve cavity, the valve needle component (2) comprises a valve needle part (21), a corrugated pipe (22) and a fixing part (23), the fixing part (23) is fixed on the valve body (1), one side of the corrugated pipe (22) is fixedly connected with the valve needle part (21), the other side of the corrugated pipe (22) is fixedly connected with the fixing part (23), one of the valve needle part (21) and the fixing part (23) is provided with a balance hole (211) for communicating an inner cavity of the corrugated pipe (22) with the valve cavity.

2. The throttle valve device according to claim 1, wherein the fixing portion (23), the bellows (22), and the valve needle portion (21) are arranged in this order in a direction from the inlet port (141) to the outlet port (151), and the balance hole (211) is provided to the valve needle portion (21).

3. A throttle valve device according to claim 1, characterized in that the fixing portion (23) is provided with a projection (231), and the first end portion is fitted over the projection (231) and connected to the projection (231).

4. A throttle valve device according to claim 1 characterized in that the outer edge of the fixing part (23) is provided with a notch (232), and the notch (232) and the inner wall of the valve body (1) enclose to form the flow passage.

5. The throttle valve apparatus according to claim 1, wherein the valve body (1) comprises a first housing portion (11) and a second housing portion (12) connected, and the fixing portion (23) is installed at a butt joint of the first housing portion (11) and the second housing portion (12), or the fixing portion (23) is installed at one of the first housing portion (11) and the second housing portion (12).

6. A throttle device according to claim 5, characterized in that the valve body (1) further comprises a valve seat (13), which valve seat (13) is provided with the valve port, which valve seat (13) is connected with the second housing part (12).

7. A throttle valve arrangement as claimed in claim 6, characterized in that the valve body (1) further comprises an inlet pipe (14) and an outlet pipe (15), the inlet pipe (14) being connected to the first housing part (11), the outlet pipe (15) being connected to the valve seat (13), the inlet pipe (14) forming the inlet (141) at the end remote from the first housing part (11), the outlet pipe (15) forming the outlet (151) at the end remote from the valve seat (13).

8. A throttle valve arrangement as set forth in claim 6 characterized in that the valve seat (13) is provided with a constant diameter bore section (131) and a diverging bore section (132), the diverging bore section (132) being connected to the constant diameter bore section (131) and being located downstream of the constant diameter bore section (131), the constant diameter bore section (131) being adapted to form the valve port.

9. The throttle valve device according to any one of claims 1 to 8, wherein an outer wall of the valve needle portion (21) is provided with a limit portion (212), an inner wall of the valve body (1) is provided with a limit engagement portion, and the valve needle portion (21) and the valve port are in clearance fit in both axial and radial directions in a state where the limit portion (212) is in axial abutment with the limit engagement portion.

10. The throttle device according to claim 9, wherein the valve needle portion (21) includes a small-sized section having an outer diameter smaller than an inner diameter of the valve port, and the stopper portion (212) and the stopper fitting portion are in axial abutment with each other, and the small-sized section is located in the valve port.

11. The throttle device of claim 10, wherein the small-sized section comprises an equal-diameter section (213) and a second tapered section (215), and a large-diameter end of the second tapered section (215) is connected to the equal-diameter section (213) and is located downstream of the equal-diameter section (213).

12. The throttle valve device according to claim 10, wherein the valve needle portion (21) further comprises a first tapered section (214), and a small diameter end of the first tapered section (214) is connected to the small size section and is located upstream of the equal diameter section (213).