CN110805703A

CN110805703A - Pressure regulating valve and refrigerating system

Info

Publication number: CN110805703A
Application number: CN201911242464.2A
Authority: CN
Inventors: 梁忠海
Original assignee: Beijing Bitzer Refrigeration Equipment Co Ltd
Current assignee: Beijing Bitzer Refrigeration Equipment Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-02-18

Abstract

The invention relates to a pressure regulating valve and a refrigerating system, belonging to the technical field of refrigeration, wherein the pressure regulating valve comprises a valve body and a valve core, a partition plate is arranged in a cavity of the valve body, the partition plate is provided with a first through hole, and the valve core is plugged in the first through hole; the piston cylinder for installing the piston is arranged on the cavity wall of the liquid outlet cavity, and a piston rod of the piston is propped against the valve core; a plug plate provided with a second through hole and a notch is installed at the opening of the piston cylinder, a plug is installed in the second through hole, a first flow passage is arranged in the plug plate, a second flow passage is arranged on the valve body and is communicated with the first flow passage and the liquid inlet cavity, a third through hole is formed in the plug, and a third flow passage is formed in the piston; the elastic baffle is arranged at the notch; the upper valve cover is arranged on the blocking plate and provided with a mounting hole, a push plate, a block body and a first spring are mounted in the mounting hole, the first spring is pushed between the block body and the push plate, the push plate is pressed on the elastic baffle, the refrigerating system adopts the pressure regulating valve, and the pressure regulating valve and the refrigerating system have the advantage of lower cost.

Description

Pressure regulating valve and refrigerating system

Technical Field

The invention belongs to the technical field of refrigeration, and particularly relates to a pressure regulating valve and a refrigeration system.

Background

In the prior art, a pressure regulating valve is required in a refrigeration system to control the on-off of a pipeline according to the pressure in the pipeline.

The traditional pressure regulating valve comprises a valve core, a valve body and a driving part, wherein the driving part drives the valve core to act in the valve body, the driving part acts according to the pressure of a medium in a pipeline, the core of the driving part of the traditional pressure regulating valve is a corrugated pipe, and the valve core is driven to act by utilizing the expansion characteristic of the corrugated pipe. However, under the influence of its own weight, the bellows cannot be completely natural in any state, i.e. it is either stretched or compressed, and usually, an additional structure is provided on the pressure regulating valve to counteract the deviation of the bellows from the natural state, thereby resulting in a more complicated structure and higher cost of the pressure regulating valve.

Disclosure of Invention

The invention provides a pressure regulating valve, which is used for solving the technical problems of complex structure and high cost of the pressure regulating valve in the prior art.

The invention is realized by the following technical scheme: a pressure regulating valve comprises a valve body, a valve core and a driving part, wherein a cavity is arranged in the valve body, a partition plate for dividing the cavity into a liquid inlet cavity and a liquid outlet cavity is arranged in the cavity, a first through hole for communicating the liquid inlet cavity with the liquid outlet cavity is formed in the partition plate, and the valve core is plugged in the first through hole;

the driving part comprises a piston, a piston cylinder communicated with the liquid outlet cavity is arranged on the cavity wall of the liquid outlet cavity, the piston is adaptively installed in the piston cylinder, a piston rod is arranged on the piston and abuts against the valve core, and a component for limiting the valve core to move axially along the piston rod and driving the valve core to reset is further installed in the liquid inlet cavity;

a plug plate for plugging the cylinder opening is installed at the cylinder opening of the piston cylinder, a second through hole communicated with the cylinder opening is formed in the plug plate, a plug is installed in the second through hole in an interference mode, a notch is formed in the center of the upper surface of the plug plate, a first flow channel is arranged in the plug plate, the first flow channel is communicated with the notch, a second flow channel is arranged on the wall body of the valve body and communicated with the first flow channel and the liquid inlet cavity, the plug extends into the notch, a third through hole for communicating the notch with the second through hole is formed in the plug plate, a third flow channel for communicating the piston cylinder with the liquid outlet cavity is formed in the piston, and the sectional area of the third flow channel is equal to one tenth of the sectional area of the second through hole;

the elastic blocking piece is arranged at the opening edge of the notch and covers the notch;

still include the upper valve cover, the upper valve cover is installed on the closure plate and be equipped with the mounting hole on this upper valve cover, movable mounting has push pedal, block and first spring in the mounting hole, the push pedal is installed the drill way department of mounting hole, the block is installed the hole bottom of mounting hole, first spring top the block with between the push pedal, the push pedal is pressed on the elastic barrier piece so that the elastic barrier piece is attached in the end cap surface and with the third through-hole is plugged up.

Furthermore, in order to better realize the invention, the liquid inlet device also comprises a pipe body, wherein the pipe body is inserted in the second flow channel, and one end of the pipe body extends into the liquid inlet cavity.

Furthermore, in order to better realize the invention, one end of the pipe body, which extends into the liquid inlet cavity, is provided with a bevel cut, and the bevel cut faces the liquid outlet cavity.

Further, in order to better implement the present invention, the elastic baffle is a sheet structure made of stainless steel material, and the thickness of the elastic baffle is 0.1 mm.

Furthermore, in order to better realize the invention, the invention further comprises a first screw rod and a first nut, wherein a fourth through hole penetrating through the upper valve cover is arranged at the hole bottom of the mounting hole, the first nut is coaxially mounted at the fourth through hole, the first screw rod is in threaded connection with the first nut, and the first screw rod penetrates through the fourth through hole and extends into the mounting hole to be connected with the block body.

Furthermore, in order to better realize the invention, the assembly comprises a second spring, a baffle ring, a second screw rod and a second nut, and a fifth through hole is arranged on the side wall of the liquid inlet cavity;

the lower valve cover is arranged on the valve body and blocks the fifth through hole, the second nut is coaxially arranged at the position of the fifth through hole, the second screw rod is in threaded connection with the second nut, penetrates through the fifth through hole and extends into the liquid inlet cavity, and a convex block is arranged at one end, extending into the liquid inlet cavity, of the second screw rod;

a convex shaft is arranged at one end, close to the liquid inlet cavity, of the valve core, a central hole is formed in the convex shaft, the baffle ring is coaxially arranged at the hole of the central hole, the second screw rod and the convex block penetrate through the baffle ring and extend into the central hole, and the convex block abuts against the surface of the baffle ring;

the second spring is sleeved on the protruding shaft and is propped between the valve core and the lower valve cover.

Further, in order to better implement the present invention, a sixth through hole communicated with the first flow channel is provided on a side wall of the first flow channel, and a connection portion for connecting a pressure detection device is installed in the sixth through hole.

Further, in order to better implement the present invention, the connecting portion includes a mounting tube coaxially mounted in the sixth through hole and a valve core mounted in the mounting tube.

Further, in order to better implement the present invention, a first cap covering the first nut and the first lead screw is installed at the end of the upper valve cover, a second cap covering the second nut and the second lead screw is installed at the end of the lower valve cover, and a third cap covering the opening of the installation pipe is installed at the end of the installation pipe.

The invention also provides a refrigerating system which adopts the pressure regulating valve.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention provides a pressure regulating valve, which comprises a valve body, a valve core and a driving part, wherein a cavity is arranged in the valve body, the cavity is divided into a liquid inlet cavity and a liquid outlet cavity by a partition plate, a first through hole is arranged on the partition plate, the liquid inlet cavity and the liquid outlet cavity are communicated by the first through hole, the valve core is plugged in the first through hole to divide the liquid inlet cavity and the liquid outlet cavity, the driving part comprises a piston and a piston rod arranged on the piston, a piston cylinder is arranged on the side wall of the liquid outlet cavity, the piston is arranged in the piston cylinder, the piston rod is positioned in the liquid outlet cavity and is propped against the valve core, a component is also arranged in the liquid inlet cavity to drive the valve core to reset after being opened and enable the valve core to move only along the axis of the piston rod, a plugging plate is arranged at the opening part of the piston cylinder, a second through hole is arranged on the plugging, the first flow passage is communicated with the notch, the wall body of the valve body is provided with a second flow passage, the second flow passage is communicated with the first flow passage and the liquid inlet cavity, the plug extends into the notch, the plug is provided with a third through hole communicated with the notch and the second through hole, a medium entering the liquid inlet cavity can enter the second flow passage and then enter the first flow passage and the notch, the plug is provided with an upper valve cover, the edge of the notch of the plug is provided with an elastic blocking piece, the upper valve cover is provided with a mounting hole, a push plate, a first spring and a block body are arranged in the mounting hole, the block body is positioned at the bottom of the mounting hole, the push plate is positioned at the hole opening of the mounting hole, the first spring is propped between the block body and the push plate, the push plate is pressed on the surface of the elastic blocking piece by the thrust of the first spring, the plug extends into the notch when the plug is arranged in the second through hole, and the elastic blocking, when the pressure of the medium entering the notch reaches a certain degree, the acting force exerted on the elastic baffle piece by the medium in the notch is larger than the combined force of the elastic acting force of the first spring and the gravity of the push plate, the medium pushes the elastic baffle piece upwards to drive the elastic baffle piece to be away from the plug, so that the third through hole is communicated with the notch, the medium in the notch enters the third through hole and flows into the second through hole, then the medium enters the piston cylinder to push the piston to act, further drive the piston rod to push the valve core to flow out of the first through hole, so that the liquid inlet cavity and the liquid outlet cavity are communicated, when the pressure of the medium entering the notch is not enough to push the elastic baffle piece to release the third through hole, at the moment, the channel between the third through hole and the notch is blocked, the medium in the third through hole, the second through hole and the piston cylinder flows into the liquid outlet cavity through a third flow passage arranged on the piston, in the process, the assembly pushes the valve core, the pressure regulating valve with the structure drives the piston and the piston rod to open or close the valve core by using the pressure of the medium, and controls whether the pressure of the medium acts on the piston or not by means of the first spring, the push plate and the elastic blocking piece, so that the structure is more ingenious, the stability is higher, the structure is simpler, and the cost is lower.

(2) The refrigeration system provided by the invention adopts the pressure regulating valve, so that the refrigeration system is lower in cost and higher in stability

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a pressure regulating valve in an embodiment of the present invention;

FIG. 2 is a partially enlarged view of region A in FIG. 1;

FIG. 3 is a partial enlarged view of the area B in FIG. 1;

fig. 4 is a partially enlarged view of the region C in fig. 1.

In the figure: 1-a second cap; 2-a second nut; 3-a second spring; 4-a fifth via; 5-a baffle ring; 6-liquid inlet cavity; 7-a separator; 8-a pipe body; 9-a valve body; 10-a piston rod; 11-a second flow channel; 12-a piston; 13-a first flow channel; 14-valve core; 15-a third cap; 16-installing a tube; 17-a sixth via; 18-an elastic baffle sheet; 19-push plate; 20-upper valve cover; 21-mounting holes; 22-a first lead screw; 23-a first cap; 24-a first nut; 25-a fourth via; 26-block body; 27-a first spring; 28-plug; 29-notches; 30-a blocking plate; 31-a piston cylinder; 32-a valve core; 33-a liquid outlet cavity; 34-a central aperture; 35-a convex shaft; 36-a bump; 37-a second lead screw; 38-lower valve cover; 39-third flow path.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Example 1:

the embodiment provides a pressure regulating valve which is used for automatically conducting a pipeline with a medium flowing through or a pipeline wall according to the pressure of the medium.

As shown in fig. 1, the pressure regulating valve includes a valve body 9, a valve core 32 and a driving part, the valve body 9 is a housing structure, and an inlet and an outlet are provided on a sidewall of the valve body 9, a hole diameter in the valve body 9 is partitioned by a partition plate 7 provided in the middle of the valve body 9 to form a liquid inlet chamber 6 and a liquid outlet chamber 33, the inlet is provided on the sidewall of the liquid inlet chamber 6, the outlet is provided on the sidewall of the liquid outlet chamber 33, a medium enters the liquid inlet chamber 6 from the inlet, a first through hole is provided on the partition plate 7, the first through hole conducts the liquid inlet chamber 6 and the liquid outlet chamber 33, when the pressure regulating valve provided in this embodiment is opened, the first through hole conducts, the medium enters the liquid outlet chamber 33 from the liquid inlet chamber. The valve core 32 is plugged in the first through hole to block the first through hole, so as to disconnect the liquid inlet chamber 6 and the liquid outlet chamber 33, and when the pressure regulating valve provided by the embodiment is in an open state, the valve core 32 is driven by the driving part to come out of the first through hole.

The driving member is automatically operated according to the pressure of the medium. Specifically, the driving component comprises a piston 12 and a piston rod 10, a piston cylinder 31 is arranged on the wall of the liquid outlet cavity 33, the piston 12 is fittingly installed in the piston cylinder 31, the piston rod 10 is arranged on the piston 12 and located in the liquid outlet cavity 33, and the free end of the piston rod 10 is abutted against the valve core 32. When the piston 12 is actuated, the piston rod 10 is actuated, thereby actuating the valve element 32. The liquid inlet chamber 6 is further provided with a component, which is used for driving the valve core 32 to move only along the axis of the piston rod 10, so as to limit the movement of the valve core 32, thereby avoiding the valve core 32 from deviating during the movement process, and the component can also drive the valve core 32 coming out of the first through hole to reset and enter the first through hole again, namely, the pressure regulating valve is changed from the open state to the closed state.

As can be seen from the above structure, when the piston 12 is actuated, the valve element 32 is actuated. The pressure regulating valve provided by this embodiment further includes a blocking plate 30, a blocking head 28 and an elastic blocking piece 18, the blocking plate 30 is installed at the opening of the piston cylinder 31 and seals the opening, the blocking plate 30 is provided with a second through hole, the surface of one side of the blocking plate 30 far away from the piston cylinder 31 is provided with a notch 29, the second through hole is communicated with the notch 29 and the piston cylinder 31, the plug 28 is plugged in the second through hole, namely the plug 28 breaks a communication channel between the notch 29 and the piston cylinder 31, the plug 28 is provided with a third through hole, which can communicate the notch 29 and the second through hole, thus, the notch 29, the third through hole, the second through hole and the piston cylinder 31 are in a conduction state, the flexible flap 18 is mounted on the edge of the slot 29 and covers the entire slot 29, one end of the plug 28 extends into the notch 29, and the flexible flap 18 is naturally attached to the surface of the plug 28.

In order to make the elastic blocking piece 18 completely press against the surface of the plug 28 to block the third through hole under the natural state, as shown in fig. 3, the pressure regulating valve provided in this embodiment further includes an upper valve cover 20, the upper valve cover 20 is installed on the blocking plate 30, a mounting hole 21 is formed on a side surface of the upper valve cover 20 opposite to the blocking plate 30, a push plate 19, a first spring 27 and a block 26 are installed in the mounting hole 21, the block 26 is located at the bottom of the mounting hole 21, the push plate 19 is located at the opening of the mounting hole 21, and both the push plate 19 and the block 26 are movably installed, the first spring 27 is abutted between the push plate 19 and the block 26, the push plate 19 can come out of the mounting hole 21, specifically, the push plate 19 abuts against the elastic blocking piece 18, so as to press the elastic blocking piece 18 against the plug 28, and further drive the elastic blocking piece 18 to block the third through hole.

The blocking plate 30 is provided therein with a first flow channel 13, the first flow channel 13 is communicated with the notch 29, and an outlet of the first flow channel 13 is located at one side of a space where the stopper 28 is located, it is noted that the push plate 19 and the stopper 28 are respectively disposed at two sides of the elastic blocking plate 18, an outlet of the first flow channel 13 is located at one side of the stopper 28, a second flow channel 11 is disposed in a side wall of the valve body 9, and the second flow channel 11 is communicated with the first flow channel 13 and the liquid inlet cavity 6.

By adopting the above structure, when the pressure regulating valve provided by this embodiment is used, firstly, the medium enters the liquid inlet cavity 6 from the inlet, at this time, the valve core 32 is located in the first through hole to cut off the liquid outlet cavity 33 and the liquid inlet cavity 6, and the elastic blocking piece 18 is completely attached to the surface of the plug 28 and blocks the third through hole under the action of the push plate 19 and the first spring 27, the medium entering the liquid inlet cavity 6 will enter the second flow channel 11 and flow through the first flow channel 13 and enter the notch 29, when the medium pressure is large enough, and the pressure applied to the elastic blocking piece 18 by the medium is greater than the resultant force of the elastic acting force of the first spring 27 and the gravity of the push plate 19, the medium will push the elastic blocking piece 18 to move the elastic blocking piece 18 to the side away from the plug 28, so that the elastic blocking piece 18 can no longer block the third through hole, and at this time, the notch 29 is conducted with the third through hole, the, the medium entering the notch 29 will flow through the third through hole and then the second through hole and enter the piston cylinder 31, pushing the piston 12 to move toward the valve core 32, and the piston rod 10 will move along with the piston 12, so that the piston rod 10 will act on the valve core 32 to push the valve core 32 to come out from the first through hole, and at this time, the first through hole can conduct the liquid inlet chamber 6 and the liquid outlet chamber 33, so that the pressure regulating valve provided by the present embodiment is opened.

When the pressure of the medium entering the pressure regulating valve is reduced, the pressure applied by the medium on the elastic blocking piece 18 is not enough to push the elastic blocking piece 18, at this time, the elastic blocking piece 18 will be reset under the action of the self-elasticity and the push plate 19 and the first spring 27 to completely cover the plug 28 to plug the third through hole, the piston 12 is provided with a third flow channel 39 for conducting the piston cylinder 31 and the liquid outlet cavity 33, the medium in the piston cylinder 31, the second through hole and the third through hole will flow into the liquid outlet cavity 33 from the third flow channel 39, so as to play a role of pressure relief, in the process, the assembly will drive the valve core 32 to gradually move towards the first through hole to enter the first through hole and finally plug the first through hole again, and at this time, the pressure regulating valve is in a closed state. It should be noted that the cross-sectional area of the third flow channel 39 is equal to one tenth or one hundredth of the cross-sectional area of the second through hole, so that the third flow channel 39 can only release the pressure when closed, and when open, the amount of the medium that can pass through the third flow channel 39 per unit time is much smaller than the amount of the medium that enters the piston cylinder 31 from the third through hole and the second through hole, so that the pressure of the medium can push the piston 12 to move.

According to the pressure regulating valve with the structure, the piston 12 and the piston rod 10 are driven by the pressure of a medium to open or close the valve core 32, and whether the pressure of the medium acts on the piston 12 is controlled by means of the first spring 27, the push plate 19 and the elastic blocking piece 18, so that the structure is more ingenious, the stability is higher, the structure is simpler, and the cost is lower.

As a best mode of the present embodiment, the elastic blocking piece 18 in the present embodiment is a sheet-shaped structure made of stainless steel, so that the elastic blocking piece 18 cannot be magnetized, thereby further enhancing the stability of the pressure regulating valve provided in the present embodiment and prolonging the service life thereof. And the thickness of the elastic barrier 18 is 0.1mm or 0.2mm or 0.3mm so that it has sufficient elasticity and restorability.

Example 2:

as an improved embodiment of embodiment 1, the pressure regulating valve provided in this embodiment further includes a tube body 8, the tube body 8 is made of 304 stainless steel, the tube body 8 is installed in the second flow passage 11, and one end of the tube body 8 extends into the liquid inlet chamber 6.

Adopt this kind of structure, the medium in feed liquor chamber 6 can not directly get into body 8, but body 8 after revolving round outside stretching into body 8 in feed liquor chamber 6 reentries body 8, like this, partial large granule impurity in the medium will adsorb on 8 outer walls of body, thereby reduce the impurity content in the medium in the entering body 8, and then reduce the content of impurity in getting into notch 29 and the piston cylinder 31, improve the stability in use of the pressure regulating valve that this embodiment provided, prolong its life.

In a preferred embodiment of this embodiment, as shown in fig. 1, the end of the tube 8 extending into the inlet chamber 6 is provided with a bevel cut, and the bevel cut faces the outlet chamber 33. Like this, can further prolong the route that the medium in the feed liquor chamber 6 got into body 8, more impurity in the medium will be adsorbed on 8 outer walls of body to further reduce the volume of the impurity that gets into in the body 8.

Example 3:

as a more preferable embodiment of the above embodiment, as shown in fig. 1, the pressure regulating valve provided in this embodiment further includes a first lead screw 22 and a first nut 24, a fourth through hole 25 penetrating through the upper valve cover 20 is provided at the bottom of the mounting hole 21, the first nut 24 is coaxially installed at the fourth through hole 25, the first lead screw 22 is screwed into the first nut 24, the first lead screw 22 penetrates through the fourth through hole 25 and extends into the mounting hole 21, and an end of the first lead screw 22 extending into the mounting hole 21 is connected to the block 26.

By adopting the structure, when the first screw rod 22 is rotated, the block 26 can be driven to move along the length direction of the mounting hole 21, namely, between the hole bottom and the hole opening of the mounting hole 21, so as to adjust the compression amount of the first spring 27, and further adjust the pressure of the medium when the elastic baffle 18 can be pushed to act, so that the pressure adjusting valve provided by the embodiment has the function of adjusting the pressure, and also a user can adjust the pressure of the medium capable of opening the pressure adjusting valve provided by the embodiment as required.

Example 4:

as a specific implementation manner of embodiment 3, in this embodiment, the assembly includes a second spring 3, a baffle ring 5, a second screw 37 and a second nut 2, and as shown in fig. 1, a fifth through hole 4 is disposed on a side wall of the liquid inlet chamber 6.

The pressure regulating valve provided in this embodiment further includes a lower bonnet 38, the lower bonnet 38 is mounted on the valve body 9 and blocks the fifth through hole 4, the second nut 2 is coaxially mounted at the fifth through hole 4, specifically, as shown in fig. 1, a seventh through hole communicated with the fifth through hole 4 is provided on the lower bonnet 38, the second nut 2 is coaxially mounted at a hole edge of the seventh through hole, the second lead screw 37 is screwed on the second nut 2, the second lead screw 37 penetrates through the seventh through hole and penetrates through the lower bonnet 38 and extends into the liquid inlet chamber 6, and a protrusion 36 is provided at one end of the second lead screw 37 extending into the liquid inlet chamber 6.

As shown in fig. 1 and 2, a protruding shaft 35 is disposed at an end of the valve core 32 close to the liquid inlet chamber 6, a central hole 34 is disposed on the protruding shaft 35, the baffle ring 5 is coaxially disposed at an opening of the central hole 34, the protruding block 36 passes through an inner annular hole of the baffle ring 5 and extends into the central hole 34, a portion of the second lead screw 37 is disposed in the inner annular hole of the baffle ring 5, and the protruding block 36 is of a disk structure and the outer diameter of the protruding block 36 is larger than the inner annular hole diameter of the baffle ring 5, in this case, the protruding block 36 abuts against the surface of the baffle ring 5. And the inner ring hole of the retainer ring 5 has a limiting function on the second lead screw 37, so that the valve core 32 can only move along the axial direction of the second lead screw 37, and the central axis of the second lead screw 37 is collinear with the central axis of the piston rod 10, so that the valve core 32 can only move along the axial direction of the piston rod 10, the valve core 32 is prevented from shifting in the moving process, and the use stability of the pressure regulating valve provided by the embodiment is enhanced.

As shown in fig. 1, the second spring 3 is sleeved outside the protruding shaft 35 and the second spring 3 is sleeved outside the second lead screw 37, one end of the second spring 3 abuts against the valve core 32, and the other end of the second spring 3 abuts against the lower valve cover 38, when the valve core 32 is far away from the first through hole (i.e. the pressure regulating valve is opened) and the medium pressure is not enough to push the elastic flap 18 to act, the second spring 3 will drive the valve core 32 into the first through hole to block the first through hole, so as to close the pressure regulating valve provided in this embodiment.

It should be noted that, when the pressure regulating valve provided in this embodiment fails and cannot be automatically opened under sufficient medium pressure, a user may screw the second lead screw 37, so as to pull the valve element 32 through the action between the protrusion 36 and the retainer ring 5, and then manually open the pressure regulating valve provided in this embodiment, thereby preventing the medium pressure in the liquid inlet chamber 6 from being increased without restriction to cause danger, and improving the safety of the pressure regulating valve provided in this embodiment.

Example 5:

in this embodiment, as a more preferable mode of the above embodiment, a sixth through hole 17 penetrating through the blocking plate 30 is provided on the side wall of the first flow passage 13, and a connection portion is installed in the sixth through hole 17, and a user can connect a pressure detection device to the connection portion to detect the pressure of the medium in the sixth through hole 17, so as to detect the pressure of the medium in the entire pressure regulating valve.

As a specific implementation manner of this embodiment, in this embodiment, as shown in fig. 2, the connecting portion includes a mounting tube 16 and a valve core 14, the mounting tube 16 is coaxially installed in the sixth through hole 17, the valve core 14 is installed in the mounting tube 16, and when the pressure detection device is installed, an air needle is provided on the pressure detection device, and the air needle penetrates through the valve core 14 to enable the pressure detection device to be communicated with the mounting tube 16 (i.e., the sixth through hole 17).

Example 6:

as a more preferable embodiment of the above embodiment, as shown in fig. 1, the pressure regulating valve provided in this embodiment further includes a first cap 23, a second cap 1 and a third cap 15, the first cap 23 is detachably and fixedly mounted at an end of the upper valve cover 20 and covers the first nut 24 and the first lead screw 22, when pressure needs to be regulated, the first cap 23 is opened and the first lead screw 22 is screwed, the second cap 1 is detachably and fixedly mounted at an end of the lower valve cover 38 and covers the second nut 2 and the second lead screw 37, when the valve core 32 needs to be manually opened, a user can open the second cap 1 and screw the second lead screw 37, the third cap 15 is detachably and fixedly mounted at an end of the mounting pipe 16 and covers a pipe orifice of the mounting pipe 16, and when a pressure detecting device needs to be connected, the third cap 15 is removed and inserted with an air needle. The first cap 23 protects the first screw 22 and the first nut 24 from malfunction, the second cap 1 protects the second screw 37 and the second nut 2 from malfunction, and the third cap 15 protects the valve core 14 and the mounting tube 16.

It should be noted that sealing structures are respectively disposed between the first cap 23 and the upper valve cover 20, between the second cap 1 and the lower valve cover 38, between the third cap 15 and the end of the mounting tube 16, between the first nut 24 and the wall of the fourth through hole 25, and between the second nut 2 and the wall of the seventh through hole, so as to avoid leakage.

Example 7:

the embodiment provides a refrigeration system, and the refrigeration system adopts the pressure regulating valve, so the refrigeration system has the advantage of lower cost.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A pressure regulating valve characterized by: the valve comprises a valve body, a valve core and a driving part, wherein a cavity is arranged in the valve body, a partition plate for dividing the cavity into a liquid inlet cavity and a liquid outlet cavity is arranged in the cavity, a first through hole for communicating the liquid inlet cavity with the liquid outlet cavity is formed in the partition plate, and the valve core is plugged in the first through hole;

2. A pressure-regulating valve as claimed in claim 1, characterized in that: the liquid inlet pipe is inserted into the second flow channel, and one end of the pipe body extends into the liquid inlet cavity.

3. A pressure-regulating valve as claimed in claim 2, characterized in that: the one end that the body stretched into feed liquor chamber is equipped with the scarf, the scarf orientation go out the liquid chamber.

4. A pressure-regulating valve as claimed in claim 1, characterized in that: the elastic separation blade is a sheet structure made of stainless steel materials, and the thickness of the elastic separation blade is 0.1 mm.

5. A pressure regulating valve according to any one of claims 1-4, characterized in that: the valve cover is characterized by further comprising a first screw rod and a first nut, a fourth through hole penetrating through the upper valve cover is formed in the hole bottom of the mounting hole, the first nut is coaxially mounted at the position of the fourth through hole, the first screw rod is in threaded connection with the first nut, penetrates through the fourth through hole and extends into the mounting hole, and the block body is connected with the first screw rod.

6. A pressure-regulating valve as claimed in claim 5, characterized in that: the assembly comprises a second spring, a baffle ring, a second screw rod and a second nut, and a fifth through hole is formed in the side wall of the liquid inlet cavity;

7. A pressure-regulating valve as claimed in claim 6, characterized in that: and a sixth through hole communicated with the first flow channel is formed in the side wall of the first flow channel, and a connecting part used for connecting pressure detection equipment is installed in the sixth through hole.

8. A pressure-regulating valve as claimed in claim 7, wherein: the connecting portion include an installation pipe and a valve core, the installation pipe is coaxially installed in the sixth through hole, and the valve core is installed in the installation pipe.

9. A pressure-regulating valve as claimed in claim 8, wherein: the upper valve cover end is provided with a first cap covering the first nut and the first screw rod, the lower valve cover end is provided with a second cap covering the second nut and the second screw rod, and the mounting pipe end is provided with a third cap covering the mounting pipe orifice.

10. A refrigeration system, characterized by: comprising a pressure regulating valve as claimed in any one of claims 1 to 9.