JP2022541727A - Throttle valve - Google Patents

Abstract

a valve tube (10) having a fluid passageway; and a valve tube (10) provided in the fluid passageway of the valve tube (10) and having a first passageway, a throttle passageway, and a second passageway, the first passageway being connected to the second passageway through the throttle passageway. a valve seat (20) communicating with two passages; a body (31) movably provided in the valve seat (20); A protrusion (32) is provided in the spindle (30) used to control the opening or closing of the throttle passage, and a spindle (30) is provided in the second passage and is throttled according to the liquid flow rate in the first passage. a gradual spring (40) having one end abutting the spindle (30) and the other end abutting at least a portion of the valve seat (20) to regulate liquid flow in the passageway. Discloses the valve. It can solve the technical problem of the difficulty in adjusting the flow rate of the throttle valve in the prior art. [Selection diagram] Fig. 1

Description

This application claims the priority of the patent application entitled "Throttle valve" with application number 201921152976.5 filed with the State Intellectual Property Office of China on July 22, 2019. there is

The present application relates to the technical field of throttle valves, and in particular to throttle valves.

Currently, when the flow rate inside the throttle valve is high, the displacement of the throttle valve spindle is large, resulting in a high liquid flow rate through the throttle, which reduces the energy efficiency of the compressor system. If the flow rate inside the throttle valve is small, the amount of displacement of the spindle of the throttle valve is small, so the flow rate of the liquid flowing through the throttle portion becomes small. The temperature will continue to rise. The throttle valve of the prior art cannot reasonably adjust the flow rate of the throttle according to the actual situation, so that the energy efficiency and capacity of the entire compressor cannot be effectively ensured.

The main purpose of the present application is to provide a throttle valve to solve the technical problem of difficulty in adjusting the flow rate of the throttle valve in the prior art.

To achieve the above objects, the present application provides a valve tube having a fluid passageway, a first passageway, a throttle passageway and a second passageway provided in the fluid passageway of the valve tube, the first passageway comprising a valve seat that communicates with the second passage through the throttle passage; a main body portion that is movably provided in the valve seat; a spindle used to control the flow capacity of the restricted passage; and a spindle disposed within the second passage and having one end attached to the spindle for adjusting the liquid flow rate within the restricted passage in response to the liquid flow rate within the first passage. a graduated spring abutted with the other end abutting at least a portion of the valve seat.

Additionally, the progressive spring is a tower spring or a variable pitch spring.

Further, the side surface of the body portion includes a positioning side surface and a drain surface, the positioning side surface and the drain surface are connected, the positioning side surface corresponds to the inner wall surface of the valve seat, and is between the drain surface and the inner wall of the valve seat. , a fluid gap is formed.

Further, the spindle further includes a first mounting portion, the first mounting portion being provided at one end of the body portion remote from the protrusion, and one end of the progressive spring being mounted on the first mounting portion.

Furthermore, the throttle valve further includes a header provided on the valve seat, the header being located at one end remote from the spindle of the progressive spring and the other end of the progressive spring abutting at least a portion of the header; A third passageway is provided in the header such that the fluid passageway communicates with the second passageway through the third passageway.

Further, the header includes a body portion and a second mounting portion, and the other end of the progressive spring is provided on the second mounting portion.

Further, the valve seat includes a valve seat body and a first positioning portion extending from the valve seat body, the first positioning portion being fixed to the header by crimping or welding.

Further, the first positioning part includes a first positioning protrusion, the first positioning protrusion has a fitting segment and a bent segment, the fitting segment and the bent segment are connected, and the fitting segment is provided on the valve seat body. , at least a portion of the fitting segment fits into the header to position the header, and at least a portion of the fold segment abuts the end of the header to position the header.

Furthermore, the valve pipe is provided with a second positioning portion, which is used to abut on at least a portion of the valve seat to position the valve seat.

Further, the second positioning part is a second positioning projection, the valve seat is provided with a positioning groove that engages with the second positioning projection, the second positioning projection is provided in the positioning groove, and the valve Locate the seat.

A technical aspect of the present application is applied to add a gradual spring in the second passage, and one end of the gradual spring abuts the spindle and the other end abuts the valve seat. When the displacement of the gradual spring is small, the modulus of elasticity of the gradual spring is small, and as the displacement of the gradual spring increases, the modulus of elasticity of the gradual spring gradually increases. This makes it easier to control the flow rate of the constriction in response to the magnitude of the flow rate in the first passageway by controlling the parameters of the progressive spring itself. Specifically, under the action of the progressive spring, a low flow rate in the first passage results in a low spindle misalignment, where the spindle misalignment changes rapidly as the flow increases. It becomes easier to rapidly increase the flow area. If the flow rate in the first passage is high, the amount of spindle misalignment is large, and in this case, as the flow rate increases, the change in the spindle misalignment becomes relatively gradual, resulting in a substantially constant situation, which , the high pressure flow can be limited by limiting the increase in flow area when the flow is large. Therefore, by adopting the technical aspect provided by the present application, it is possible to solve the technical problem of the difficulty in adjusting the flow rate of the throttle valve in the prior art.

The drawings in the specification, which form part of the present application, are for providing a further understanding of the present application, and the schematic examples of the present application and their description are for interpreting the present application. and are not intended to unduly limit this application.

FIG. 2 shows a structural schematic diagram of a throttle valve provided by an embodiment of the present application; FIG. 2 shows a partially enlarged schematic view of part I in FIG. 1 ; 1 shows a cross-sectional view of a throttle valve provided by an embodiment of the present application; FIG. FIG. 2 shows a front view of a progressive spring, which is a variable pitch spring provided by embodiments of the present application; FIG. 3 shows a top view of a progressive spring, which is a variable pitch spring provided by embodiments of the present application; Fig. 2 shows a front view of a progressive spring, which is a tower spring provided by embodiments of the present application; FIG. 3 shows a top view of a progressive spring, which is a tower spring provided by embodiments of the present application; FIG. 4 shows a schematic diagram of the relationship between the amount of lift of the spindle and the flow area of the constriction provided by the embodiments of the present application; FIG. 4 shows a schematic diagram of the relationship between the amount of spindle lift and the pressure difference across the throttle provided by an embodiment of the present application;

Here, the above drawings include the following reference numerals.
Reference Signs List 10 valve tube 11 second positioning projection 20 valve seat 21 valve seat main body 22 first positioning portion 221 fitting segment 222 bent segment 23 positioning groove 30 spindle 31 body portion 311 drain surface 32 projection Section 33 First Mounting Section 40 Gradual Spring 50 Header 51 Body Section 52 Second Mounting Section 53 Third Passage.

It should be noted that the examples in the present application and the features in the examples can be combined with each other unless inconsistent. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail together with embodiments with reference to the drawings.

As shown in FIGS. 1-9, embodiments of the present application provide a throttle valve that includes valve pipe 10, valve seat 20, spindle 30, and progressive spring 40. As shown in FIGS. Here the valve tube 10 has a fluid passageway. A valve seat 20 is provided in the fluid passage of the valve tube 10, the valve seat 20 having a first passage, a throttle passage and a second passage, the first passage communicating with the second passage through the throttle passage. be. A spindle 30 is movably mounted within the valve seat 20 and includes a body portion 31 and a projection 32, the body portion 31 being mounted within the second passageway and the projection 32 for controlling the flow capacity of the restricted passageway. It is used, and specifically includes controlling the conduction or interruption of the throttle passage. A progressive spring 40 is provided in the second passageway and one end of the progressive spring 40 bears against at least a portion of the spindle 30 to adjust the liquid flow rate in the restricted passage in response to the liquid flow rate in the first passageway. and the other end is brought into contact with the valve seat 20 . The throttle valve in this embodiment is mainly used for compressors. Specifically, one end of the progressive spring 40 in this embodiment abuts the end of the spindle 30 .

Employing the throttle valve provided by this embodiment adds a progressive spring 40 in the second passage so that the modulus of the progressive spring 40 increases as the displacement of the progressive spring 40 increases. Specifically, when the amount of displacement of progressive spring 40 is small, the modulus of elasticity of progressive spring 40 is small, and when the amount of displacement of progressive spring 40 is large, the modulus of elasticity of progressive spring 40 is large. This makes it easier to control the flow rate of the constriction in response to the magnitude of the flow rate in the first passageway by adjusting the parameters of the progressive spring 40 itself. Specifically, under the action of the progressive spring 40, a low flow rate in the first passage results in a low displacement of the spindle 30, where the displacement of the spindle 30 changes as the flow increases. is faster, it is easier to rapidly increase the flow area, prevent the intake air temperature of the compressor from becoming too high, and further extend the service life of the compressor. If the flow rate in the first passage is large, the amount of displacement of the spindle 30 is large, and in this case, as the flow rate increases, the displacement of the spindle 30 changes relatively gradually, and eventually a situation occurs that does not change substantially. , when the flow rate is large, the increase in flow area can be limited to limit the high pressure flow rate, further ensuring the overall efficiency and capacity of the compressor.

As shown in FIGS. 4-7, in this embodiment the progressive spring 40 may be a tower spring or a variable pitch spring. Specifically, the tower spring in this embodiment refers to a step spring, and the variable pitch spring refers to a variable helical pitch spring. Specifically, under the action of the tower spring or variable pitch spring, if the amount of displacement of the tower spring or variable pitch spring is small, the elastic modulus of the tower spring or variable pitch spring is small. Easy to grow rapidly. When the amount of displacement of the tower spring or variable pitch spring is large, the elastic modulus of the tower spring or variable pitch spring is large. Even if the flow rate increases, a situation occurs in which the amount of displacement remains almost unchanged, and the high pressure flow rate can be limited.

Specifically, the tower spring or variable pitch spring can change the relationship between the lift (displacement) of the spindle 30 and the throttling area of the throttling section, and the product flow rate is too small at low pressure differentials. It can reduce the problem that the intake air temperature is too high and the temperature of the whole system keeps rising, and at the same time improve the problem that the product flow rate is too large at high pressure difference and the system energy efficiency is low.

At the same time, the tower spring or variable pitch spring can also change the relationship between the lift (displacement change) of the spindle 30 and the pressure difference across the valve, causing the product flow rate to be too small at low pressure differentials, the compressor intake It can reduce the problem that the temperature is too high and the temperature of the whole system keeps rising, and at the same time improve the problem that the product flow rate is too large at high pressure difference and the system energy efficiency is low.

In this embodiment, the side surface of the main body part 31 includes a positioning side surface and a drain surface 311, the positioning side surface and the drain surface 311 are connected, and the positioning side surface corresponds to the inner wall surface of the valve seat 20 to form the positioning side surface. through to help guide the spindle 30 for movement within the second passage. The cross-sectional area of the body portion 31 in this embodiment is smaller than the cross-sectional area of the second passage. Allow the liquid to flow through the fluid gap. Specifically, the drain surface 311 in this embodiment may be an inner concave surface or a planar surface.

Specifically, the spindle 30 in this embodiment further includes a first mounting portion 33, which is provided at one end of the body portion 31 remote from the protrusion 32, and one end of the progressive spring 40 is at the first end. 1 attachment portion 33 . Such a setting allows one end of the progressive spring 40 to abut against the end of the body portion 31 to facilitate positioning of the progressive spring 40 . Specifically, the first mounting part 33 in this embodiment can be a first mounting protrusion or a first mounting groove, and when the first mounting part 33 is the first mounting protrusion, one end of the progressive spring 40 is fitted over the first mounting projection and the first mounting portion 33 is the first mounting groove, one end of the progressive spring 40 is provided in the first mounting groove and is progressively mounted by the first mounting groove. One end of spring 40 is attached to position progressive spring 40 .

In this embodiment, the throttle valve further includes a header 50 which is provided on the valve seat 20 and located at one end of the progressive spring 40 remote from the spindle 30 and the other end of the progressive spring 40 at the header 50. At least partially abutted to facilitate positioning of the progressive spring 40 . A third passageway 53 is provided in the header 50 such that the fluid passageway communicates with the second passageway via the third passageway 53 . In this embodiment, a third passageway 53 may be provided in the middle of the header 50 to provide better communication between the second passageway and the fluid passageway.

Specifically, the header 50 in this embodiment includes a body portion 51 and a second mounting portion 52 , and the other end of the progressive spring 40 is provided on the second mounting portion 52 . Specifically, the second mounting portion 52 may be a second mounting projection or a second mounting groove, and if the second mounting portion 52 is a second mounting projection, the other end of the progressive spring 40 may be a second mounting groove. 2 mounting lugs and the second mounting portion 52 is the second mounting groove, the other end of the progressive spring 40 is provided in the second mounting groove and the progressive spring 40 is mounted by the second mounting groove. is attached to position the progressive spring 40 . With such a setting, the other end of the progressive spring 40 can abut against the body portion 51 to facilitate better positioning of the progressive spring 40 thereby connecting the progressive spring 40 to the header 50 and the spindle. 30 can be stably deformed.

The valve seat 20 includes a valve seat body 21 and a first positioning portion 22 extending from the valve seat body 21 . The first positioning portion 22 is provided at the upper end of the valve seat body 21 to position the header 50 . The first positioning portion 22 is fixed to the header 50 by crimping, welding, or screw connection. Specifically, the first positioning portion 22 in this embodiment is provided at the end portion of the valve seat body 21 .

The first positioning part 22 includes a first positioning protrusion, the first positioning protrusion has a fitting segment 221 and a bending segment 222, the fitting segment 221 and the bending segment 222 are connected, and the fitting segment 221 is attached to the valve seat body 21. be provided. At least part of the fitting segment 221 fits into the header 50 to position the header 50, the fitting segment 221 and the end of the valve seat body 21 form a positioning step, and the header 50 is sandwiched between the positioning steps. and at least a portion of the folded segment 222 abuts the end of the header 50 to position the header 50 . By adopting such a setting, the fitting segment 221 and the bending segment 222 can stably position the header 50, prevent the position of the header 50 from being deviated during use, and ensure the stability of the entire structure. is increasing.

In this embodiment, the valve tube 10 is provided with a second positioning portion in order to prevent the valve seat 20 from being displaced during use. The second positioning portion abuts at least a portion of the valve seat 20 and is used to position the valve seat 20 so that the valve seat 20 is stably provided on the valve pipe 10 .

Specifically, the second positioning portion in this embodiment is the second positioning protrusion 11 , and the valve seat 20 is provided with a positioning groove 23 that engages with the second positioning protrusion 11 . The second positioning protrusion 11 is provided in the positioning groove 23 to position the valve seat 20 , so that the valve seat 20 can be stably provided on the valve pipe 10 . In another embodiment, the second positioning part is a female threaded structure, and the valve seat 20 is provided with a male threaded structure to be engaged with the female thread, and the engagement of the female and male threads to perform fixing and mounting, and the same may take effect.

In FIG. 8, L represents the lift amount (displacement change amount) of the spindle 30, and S represents the flow area of the throttle passage. As shown in FIG. 8, a small lift of the spindle 30 increases the flow area rapidly to prevent the intake air temperature from being too high and affecting the service life of the compressor. A large lift of the spindle 30 results in a relatively gradual change in flow area, which limits the increase in flow area and also limits the high pressure flow to ensure the energy efficiency and capacity of the whole machine. ing.

In FIG. 9, L represents the lift amount (displacement change amount) of the spindle 30, and P represents the pressure difference before and after the throttle valve. As shown in FIG. 9, when the amount of lift of the spindle 30 is small, the change in the pressure difference across the valve becomes faster, which makes it easier to increase the flow area, prevent the flow from becoming too small, and increase the lift of the spindle 30. A large amount slows down the change in pressure differential across the valve.

From the above description, it can be seen that the above-described embodiments of the present application, with the progressive spring 40, can help control the magnitude of the throttle flow, prevent the intake air temperature from becoming too high, and extend the service life of the compressor. is extended, the high-pressure flow rate is restricted, the energy efficiency and capacity of the entire machine are secured, and the technical effects of simple structure and reliability are realized.

The above are only preferred embodiments of the present application and are not intended to limit the present application, and various modifications and variations are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall fall within the protection scope of this application.

Claims (10)

a valve tube (10) having a fluid passage;
A valve seat (20) provided in the fluid passage of the valve pipe (10) and having a first passage, a throttle passage, and a second passage, wherein the first passage passes through the throttle passage to the second valve seat (20). a valve seat (20) in communication with the passage;
A spindle (30) movably mounted within the valve seat (20) and including a body portion (31) and a projection (32), wherein the body portion (31) is mounted within the second passageway. a spindle (30) in which said protrusion (32) is used to control the flow capacity of said restricted passage;
provided in the second passageway, one end abutting the spindle (30) and the other end the valve so as to adjust the liquid flow rate in the throttle passage according to the liquid flow rate in the first passageway; a progressive spring (40) abutting at least a portion of the seat (20);
Throttle valve including. The throttle valve of claim 1, wherein said progressive spring (40) is a tower spring or a variable pitch spring. The side surface of the main body (31) includes a positioning side surface and a drain surface (311), the positioning side surface corresponds to the inner wall surface of the valve seat (20), the drain surface (311) and the valve seat (311). 20) The throttle valve of claim 1, wherein a fluid gap is formed with the inner wall of 20). Said spindle (30) further comprises a first attachment part (33), said first attachment part (33) is provided at one end of said main body part (31) remote from said projection part (32), said gradual 2. The throttle valve of claim 1, wherein one end of the target spring (40) is attached to the first attachment portion (33). further comprising a header (50) provided on the valve seat (20);
Said header (50) is located at one end of said progressive spring (40) remote from said spindle (30) and the other end of said progressive spring (40) is attached to at least a portion of said header (50). abutted,
The throttle according to claim 1, wherein the header (50) is provided with a third passage (53), and the fluid passage communicates with the second passage via the third passage (53). valve. The header (50) comprises a body portion (51) and a second mounting portion (52), the other end of the progressive spring (40) being provided on the second mounting portion (52). Item 6. The throttle valve according to item 5. The valve seat (20) includes a valve seat body (21) and a first positioning portion (22) extending from the valve seat body (21), and the first positioning portion (22) is crimped or welded. 6. A throttle valve as claimed in claim 5, fixed to the header (50). Said first positioning part (22) comprises a first positioning protrusion, said first positioning protrusion has a fitting segment (221) and a folding segment (222), said fitting segment (221) and said folding segment ( 222), said fitting segment (221) is provided on said valve seat body (21), and at least part of said fitting segment (221) fits into said header (50). 8. Aperture according to claim 7, wherein the header (50) is positioned by a joint, and at least a portion of the folded segment (222) abuts an end of the header (50) to position the header (50). valve. A second positioning portion is provided in the valve pipe (10), and the second positioning portion contacts at least a portion of the valve seat (20) to position the valve seat (20). 2. The throttle valve according to claim 1, used for The second positioning portion is a second positioning protrusion (11), and the valve seat (20) is provided with a positioning groove (23) that engages with the second positioning protrusion (11), The throttle valve according to claim 9, wherein said second positioning projection (11) is provided in said positioning groove (23) to position said valve seat (20).

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