A low-temperature-adapted high-pressure compressor blowdown valve

Abstract

The utility model provides a kind of high-pressure compressor blowdown valve suitable for low temperature, including valve body, the inside middle part of valve body is equipped with valve cavity, piston is slidably arranged in valve cavity, the inside top of valve body is equipped with control cavity, stop block is slidably arranged in control cavity, stop block is integrally formed with piston;The front side of valve body is equipped with low-pressure air inlet, the rear side of valve body is equipped with low-pressure air outlet;The rear side of valve body is provided with solenoid valve;The front side of valve body is equipped with high-pressure sewage inlet with the inside middle part of valve cavity being communicated, force section is formed with the place of reducing diameter of piston and high-pressure sewage inlet opposite place;The inside bottom of valve body is equipped with drain hole, connecting hole is arranged between drain hole and valve cavity, when stop block and the bottom inner cavity wall of control cavity are in contact, the upper end hole of connecting hole is plugged by force section.When sewage generated by high-pressure compressor needs to be discharged, only need to control solenoid valve to open, without closing high-pressure compressor, with the advantage of more convenient in use process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a blow-off valve, in particular to a low-temperature-adaptable blow-off valve of high-pressure compressor. BACKGROUND

[0002] At present, the Chinese patent with the publication number CN208587274U discloses a blow-off valve, which comprises a valve body, the valve body is provided with an air inlet, an air outlet and a blow-off port which are connected with the valve cavity of the valve body. A piston with a spring and a sealing plug is detachably installed in the blow-off port. A stepped circle is formed on the circumferential inner wall of the blow-off port, which matches the outer contour of the piston. When the compressor is working, the gas is discharged from the air compressor exhaust valve, enters the valve cavity through the air inlet, and pushes the piston to move downward. When the piston contacts with the stepped circle, the hard sealing effect is achieved, and the blow-off port is closed. When the air compressor stops working, there is no gas pressure in the pipeline, that is, there is no pressure in the valve cavity. At this time, the spring pushes the piston to move upward, opens the blow-off port, and makes the impurities flow out through the blow-off port. However, the above-mentioned blow-off valve needs to control the connected air compressor to be closed when it is opened, which has the defect of inconvenient use. SUMMARY

[0003] Therefore, the utility model aims at providing a low-temperature-adaptable blow-off valve of high-pressure compressor, which has the advantage of convenient use.

[0004] In order to solve the above-mentioned technical problems, the technical scheme of the utility model is as follows: a low-temperature-adaptable blow-off valve of high-pressure compressor, which comprises a valve body, a valve cavity is formed in the middle part of the inner side of the valve body, a piston is slidably arranged in the valve cavity, a control cavity is formed in the top part of the inner side of the valve body and is connected with the valve cavity, the width of the control cavity is greater than that of the valve cavity, a stop block is slidably arranged in the control cavity, and the stop block is integrally formed with the piston.

[0005] A low-pressure air inlet is formed in the front side of the valve body and is connected with the top part of the inner side of the control cavity. A low-pressure air outlet is formed in the rear side of the valve body and is connected with the top part of the inner side of the control cavity. The low-pressure air entering the control cavity through the low-pressure air inlet will exert a downward force on the stop block, so as to drive the stop block and the piston to move downward.

[0006] An electromagnetic valve is arranged on the rear side of the valve body and is used to control the on-off of the low-pressure air outlet.

[0007] A high-pressure sewage inlet is formed in the front side of the valve body and is connected with the middle part of the inner side of the valve cavity. A force applying section is formed in the position opposite to the high-pressure sewage inlet by reducing the diameter of the piston. The high-pressure sewage entering the valve cavity through the high-pressure sewage inlet will exert an upward force on the force applying section, so as to drive the piston and the stop block to move upward.

[0008] The inner bottom of the valve body is provided with a drainage hole, and a connecting hole is arranged in communication between the drainage hole and the valve cavity.

[0009] Through the above technical solution, when in use, the low-pressure stage in the high-pressure compressor is connected to the low-pressure air inlet of the valve body through a pipe, so that the low-pressure air in the high-pressure compressor enters the control cavity through the low-pressure air inlet and exerts a downward force on the block. At the same time, the separator drain port of the high-pressure stage in the high-pressure compressor is connected to the high-pressure sewage inlet of the valve body through a pipe, so that the sewage discharged by the separator of the high-pressure stage in the high-pressure compressor enters the high-pressure sewage inlet and exerts an upward force on the force applying segment. Since the downward force exerted by the low-pressure air on the block is greater than the upward force exerted by the sewage on the force applying segment, the block and the piston will move downward under the influence of the above two forces until the block abuts against the bottom inner cavity wall of the control cavity, and the lower end of the force applying segment blocks the upper end hole of the connecting hole.

[0010] When it is necessary to discharge the sewage in the high-pressure compressor, the low-pressure air outlet is controlled to communicate with the outside through the electromagnetic valve, at this time the low-pressure air entering the control cavity through the low-pressure air inlet will be discharged to the outside through the low-pressure air outlet under the influence of pressure difference, so that the downward force exerted by the low-pressure air in the control cavity on the block is reduced and is less than the upward force exerted by the sewage on the force applying segment, the block and the piston will move upward under the influence of the above two forces, the block of the connecting hole is unblocked, and the sewage will flow through the high-pressure sewage inlet, the valve cavity, the connecting hole, and finally be discharged through the drainage hole.

[0011] As described above, when it is necessary to discharge the sewage generated by the high-pressure compressor, only the electromagnetic valve needs to be controlled to be opened, without the need to close the high-pressure compressor, which has the advantage of more convenient use.

[0012] Preferably, the upper end of the block is fixedly provided with a separation membrane through a threaded fastener, and the edge of the separation membrane abuts against the inner wall of the control cavity. When the upper end of the threaded fastener abuts against the top inner cavity wall of the control cavity, the edge of the separation membrane is lower than the low-pressure air inlet and the low-pressure air outlet.

[0013] Through the above technical solution, the separation membrane can prevent moisture in the air from entering the gap between the block and the control cavity, so that the movement of the block and the piston is not easily blocked by ice even when the temperature is below 0 degrees Celsius. The separation membrane is fixedly connected to the block through the threaded fastener, which has the advantage of more convenient disassembly and assembly.

[0014] Preferably, the threaded part comprises a locking screw and a pressing washer, a threaded section of the locking screw passes through the pressing washer and is screwed to the stopper, and a head of the locking screw presses the pressing washer against the isolation diaphragm.

[0015] Through the technical scheme, the pressing washer can protect the isolation diaphragm, so as to prolong the service life of the isolation diaphragm.

[0016] Preferably, the high-pressure sewage inlet comprises a water inlet section formed on the front side of the valve body and two supply sections formed on the inner side of the valve body, the two supply sections are symmetrically distributed on the left and right sides of the water inlet section, the front end of the supply section is in communication with the water inlet section, and the rear end of the supply section is in communication with the valve cavity.

[0017] Through the technical scheme, the two supply sections are symmetrically arranged, so that the sewage entering the valve cavity through the supply section can more quickly and uniformly exert an upward force on the force applying section.

[0018] Preferably, an installation cavity is formed on the inner bottom of the valve body, the upper and lower ends of the installation cavity are in communication with the valve cavity and the connecting hole respectively, a pressure bearing seat is fixedly arranged in the installation cavity, and a through hole for connecting the valve cavity and the connecting hole is arranged through the pressure bearing seat from top to bottom.

[0019] Through the technical scheme, the pressure bearing seat can be made of a material with higher strength than the valve body, thereby prolonging the service life of the sewage valve.

[0020] Preferably, counterbores in communication with the through hole are formed on the upper and lower ends of the pressure bearing seat, and the maximum width of the counterbores is greater than the inner diameter of the connecting hole.

[0021] Through the technical scheme, the counterbores arranged on the upper end of the pressure bearing seat can guide the lower end of the force applying section to enter, and the counterbores arranged on the lower end of the pressure bearing seat can better communicate with the connecting hole.

[0022] Preferably, installation grooves are formed on the left and right sides of the valve body, and a PTC heater is arranged in each installation groove.

[0023] Through the technical scheme, the PTC heater can heat the valve body, so as to prevent the sewage discharged by the separator in the high-pressure compressor from blocking the valve cavity.

[0024] Preferably, an isolation sealing ring is arranged between the valve core and the moving iron core of the electromagnetic valve.

[0025] Through the technical scheme, the isolation sealing ring can prevent liquid water from entering the gap between the moving iron core and the electromagnetic valve shell, so as to prevent the moving iron core from being frozen due to low temperature and causing the electromagnetic valve to fail. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Structure diagram of an embodiment Figure One ;

[0027] Figure 2 Structure diagram of an embodiment Figure Two ;

[0028] Figure 3 Sectional view diagram of an embodiment Figure One ;

[0029] Figure 4 Sectional view diagram of an embodiment Figure Two ;

[0030] Figure 5 Enlarged view of A part of Figure 4 .

[0031] The drawing label: 1, valve body; 2, valve cavity; 3, piston; 31, force applying section; 4, control cavity; 5, stopper; 6, low pressure air inlet; 7, low pressure air outlet; 8, electromagnetic valve; 81, valve core; 82, moving iron core; 83, isolation sealing ring; 9, high pressure sewage inlet; 91, water inlet section; 92, supply section; 10, drainage hole; 11, connecting hole; 12, threaded part; 121, locking screw; 122, extruded gasket; 13, isolation diaphragm; 14, mounting cavity; 15, pressure bearing seat; 16, through hole; 17, counterbore; 18, mounting groove; 19, PTC heater. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application are described in further detail below in conjunction with the accompanying drawings, so that the technical scheme of the present application is easier to understand and master.

[0033] A high-pressure compressor blowdown valve suitable for low temperature, as shown in Figures 1 to 5 , comprising a valve body 1. A valve cavity 2 is formed in the middle of the inner side of the valve body 1, and a piston 3 is slidingly arranged in the valve cavity 2. A control cavity 4 is formed in the top of the inner side of the valve body 1 and is in communication with the valve cavity 2, and the width of the control cavity 4 is greater than the width of the valve cavity 2. A stopper 5 is slidingly arranged in the control cavity 4, and the stopper 5 is integrally formed with the piston 3. The stopper 5 cooperates with the control cavity 4 to limit the stroke of the piston 3.

[0034] A low pressure air inlet 6 is formed in the front side of the valve body 1 and is in communication with the top of the inner side of the control cavity 4, and a low pressure air outlet 7 is formed in the rear side of the valve body 1 and is in communication with the top of the inner side of the control cavity 4. The low pressure air entering the control cavity 4 through the low pressure air inlet 6 will exert a downward force on the stopper 5, so as to drive the stopper 5 and the piston 3 to move downward.

[0035] The rear side of the valve body 1 is provided with an electromagnetic valve 8 for controlling the opening and closing of the low-pressure air outlet 7.

[0036] The front side of the valve body 1 is provided with a high-pressure sewage inlet 9 communicated with the middle part of the inner side of the valve cavity 2, and the force applying section 31 is formed in the position opposite to the high-pressure sewage inlet 9, and the high-pressure sewage entering the valve cavity 2 through the high-pressure sewage inlet 9 will apply an upward force to the force applying section 31 to drive the piston 3 and the stopper 5 to move upward.

[0037] The inner bottom of the valve body 1 is provided with a drainage hole 10, and the connection hole 11 is arranged between the drainage hole 10 and the valve cavity 2, and the upper end of the connection hole 11 is blocked by the force applying section 31 when the stopper 5 is in contact with the bottom inner cavity wall of the control cavity 4.

[0038] The upper end of the stopper 5 is fixedly provided with a separation diaphragm 13 through a threaded member 12, the edge of the separation diaphragm 13 is in contact with the inner wall of the control cavity 4, and the edge of the separation diaphragm 13 is lower than the low-pressure air inlet 6 and the low-pressure air outlet 7 when the upper end of the threaded member 12 is in contact with the top inner cavity wall of the control cavity 4. The threaded member 12 comprises a locking screw 121 and an extrusion gasket 122, the threaded section of the locking screw 121 passes through the extrusion gasket 122 and is threadedly connected to the stopper 5, and the head of the locking screw 121 presses the extrusion gasket 122 against the separation diaphragm 13.

[0039] The high-pressure sewage inlet 9 comprises a water inlet section 91 arranged on the front side of the valve body 1 and two supply sections 92 arranged on the inner side of the valve body 1, the two supply sections 92 are symmetrically distributed on the left and right sides of the water inlet section 91, the front end of the supply section 92 is communicated with the water inlet section 91, and the rear end of the supply section 92 is communicated with the valve cavity 2.

[0040] The inner bottom of the valve body 1 is provided with a mounting cavity 14, the upper and lower ends of the mounting cavity 14 are respectively communicated with the valve cavity 2 and the connection hole 11, and a pressure bearing seat 15 is fixedly arranged in the mounting cavity 14, and the pressure bearing seat 15 is provided with a through hole 16 from top to bottom for communicating the valve cavity 2 and the connection hole 11. The upper and lower ends of the pressure bearing seat 15 are respectively provided with a counterbore 17 communicated with the through hole 16, and the maximum width of the counterbore 17 is greater than the inner diameter of the connection hole 11.

[0041] The left and right sides of the valve body 1 are respectively provided with a mounting groove 18, and each mounting groove 18 is provided with a PTC heater 19.

[0042] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A drain valve for a high-pressure compressor adapted to low temperatures, comprising a valve body (1), characterized in that: A valve chamber (2) is provided in the middle of the inner side of the valve body (1), and a piston (3) is slidably arranged in the valve chamber (2). A control chamber (4) is provided at the top of the inner side of the valve body (1) and communicates with the valve chamber (2). The width of the control chamber (4) is greater than the width of the valve chamber (2). A stop block (5) is slidably arranged in the control chamber (4). The stop block (5) is integrally formed with the piston (3). The valve body (1) has a low-pressure air inlet (6) on the front side that communicates with the top of the inner side of the control chamber (4), and a low-pressure air outlet (7) on the rear side that communicates with the top of the inner side of the control chamber (4). The low-pressure air entering the control chamber (4) through the low-pressure air inlet (6) will exert a downward force on the stop block (5) to drive the stop block (5) and the piston (3) to move downward. A solenoid valve (8) for controlling the opening and closing of the low-pressure outlet (7) is provided on the rear side of the valve body (1); The valve body (1) has a high-pressure sewage inlet (9) on its front side that is connected to the middle of the inner side of the valve cavity (2). The piston (3) has a reduced diameter at the opposite end of the high-pressure sewage inlet (9) to form a force-applying section (31). The high-pressure sewage entering the valve cavity (2) through the high-pressure sewage inlet (9) will exert an upward force on the force-applying section (31) to drive the piston (3) and the stop block (5) to move upward. The valve body (1) has a drain hole (10) at the bottom of its inner side. The drain hole (10) and the valve cavity (2) are connected by a connecting hole (11). When the stop block (5) abuts against the bottom inner wall of the control cavity (4), the force application section (31) blocks the upper opening of the connecting hole (11).

2. The low-temperature adaptable high-pressure compressor drain valve according to claim 1, characterized in that: An isolation diaphragm (13) is fixedly installed on the upper end of the stop block (5) by a threaded part (12). The edge of the isolation diaphragm (13) abuts against the inner wall of the control cavity (4). When the upper end of the threaded part (12) abuts against the top inner wall of the control cavity (4), the edge of the isolation diaphragm (13) is lower than the low-pressure air inlet (6) and the low-pressure air outlet (7).

3. A high-pressure compressor drain valve adapted to low temperature as described in claim 2, characterized in that: The threaded component (12) includes a locking screw (121) and a compression washer (122). The threaded section of the locking screw (121) passes through the compression washer (122) and is threaded to the stop block (5). The head of the locking screw (121) presses the compression washer (122) against the isolation diaphragm (13).

4. A high-pressure compressor drain valve adapted to low temperature as described in claim 1, characterized in that: The high-pressure sewage inlet (9) includes an inlet section (91) opened on the front side of the valve body (1) and two supply sections (92) opened on the inner side of the valve body (1). The two supply sections (92) are symmetrically distributed on the left and right sides of the inlet section (91). The front end of the supply section (92) is connected to the inlet section (91), and the rear end of the supply section (92) is connected to the valve cavity (2).

5. A high-pressure compressor drain valve adapted to low temperature as described in claim 1, characterized in that: The valve body (1) has an installation cavity (14) at its inner bottom. The upper and lower ends of the installation cavity (14) are connected to the valve cavity (2) and the connecting hole (11) respectively. A pressure bearing seat (15) is fixedly installed in the installation cavity (14). The pressure bearing seat (15) has a through hole (16) from top to bottom to connect the valve cavity (2) and the connecting hole (11).

6. A high-pressure compressor drain valve adapted to low temperature as described in claim 5, characterized in that: The pressure bearing seat (15) has countersunk holes (17) at both the upper and lower ends that are connected to the through hole (16). The maximum width of the countersunk hole (17) is greater than the inner diameter of the connecting hole (11).

7. A high-pressure compressor drain valve adapted to low temperature as described in claim 1, characterized in that: The valve body (1) has mounting slots (18) on both the left and right sides, and each mounting slot (18) is provided with a PTC heater (19).

8. A high-pressure compressor drain valve adapted to low temperature according to claim 1, characterized in that: An isolation sealing ring (83) is provided between the valve core (81) and the moving iron core (82) of the solenoid valve (8).

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