CN219626540U - Pressure relay - Google Patents

Abstract

The utility model discloses a pressure relay, which comprises a relay body, wherein a cavity is formed in one end of the relay body, a flow guide piece is inserted into the other end of the relay body, a pressure receiving piece is slidably arranged at one end of the cavity, which is close to the flow guide piece, an elastic piece is arranged in the cavity, one end of the elastic piece is abutted to the pressure receiving piece, a pressure regulating handle is arranged at the other end of the elastic piece, a micro switch is arranged on the surface of the relay body, a contact of the micro switch is contacted with the pressure receiving piece, a drainage port is formed at one end, which is far away from the pressure receiving piece, of the flow guide piece, a sliding groove is formed at one end, which is close to the pressure receiving piece, of the flow guide piece, the sliding groove is communicated with the drainage port, a push rod is slidably and hermetically arranged in the sliding groove, one end of the push rod can be abutted to one side, which is far away from the elastic piece, a sealing groove is formed in the peripheral wall of the sliding groove, a sealing ring is slidably connected with the peripheral wall of the push rod in a gasket is arranged at one side, which is close to the pressure receiving piece. The utility model provides a pressure relay, which protects a sealing ring by arranging a gasket.

Description

Pressure relay

Technical Field

The utility model relates to the technical field of hydraulic valve manufacturing, in particular to a pressure relay.

Background

A pressure relay is an element in a hydraulic system that activates an electrical contact when the fluid pressure reaches a predetermined value. The pressure relay can be defined as a hydraulic component for converting pressure into an electric signal, and a customer can output an electric signal by adjusting the pressure relay according to the pressure design requirement of the customer.

In the hydraulic switching value output field, a pressure relay is always adopted to output switching value signals, the pressure relay mainly comprises a core element micro switch and a sealing ring for locking an oil way, the micro switch is responsible for outputting the switching value signals, the sealing ring is responsible for locking the oil way, and hydraulic oil is prevented from flowing out. However, after a period of use, the phenomenon of cracking or even breaking of the outer surface of the sealing ring can occur, so that accidents such as hydraulic oil leakage and the like are caused, environmental pollution and small-range economic loss are caused by the leakage of the hydraulic oil, and the overall hydraulic pressure of the hydraulic system is reduced due to the heavy phenomenon, so that the terminal system finally cannot operate. The reason for the cracking or even tearing of the outer surface of the sealing ring is mainly caused by uneven stress on the contact surface of the sealing ring and the inner part.

Disclosure of Invention

The utility model aims to provide a pressure relay, which protects a sealing ring by arranging a gasket, prevents the sealing ring from cracking or even breaking, prolongs the service life of the sealing ring and avoids accidents.

The utility model discloses a pressure relay which adopts the following technical scheme:

the utility model provides a pressure relay, includes the relay body, the cavity has been seted up to relay body one end, the relay body other end peg graft there is the water conservancy diversion piece, the cavity is close to water conservancy diversion piece one end and slides and be equipped with the pressurized-part, be equipped with the elastic component in the cavity, elastic component one end and pressurized-part butt, the elastic component other end is equipped with the pressure regulating handle, the pressure regulating handle is used for adjusting the compression volume of elastic component, the surface of relay body is equipped with micro-gap switch, micro-gap switch's contact contacts with the pressurized-part, the water conservancy diversion piece has been seted up to water conservancy diversion piece one end of keeping away from the pressurized-part, the spout has been seted up near pressurized-part one end, spout and drainage mouth intercommunication, sealed slip is equipped with the push rod in the spout, elastic component one side butt is kept away from to push rod one end and pressurized-part, the seal groove has been seted up to the perisporium of spout, be equipped with the sealing washer in the seal groove, sealing washer and the perisporium sealing sliding connection of push rod, sealing washer is close to pressurized-part one side.

As the preferable scheme, the guide piece is close to the pressure receiving piece one end and is inserted with the locating piece, locating piece one end and gasket butt, push rod one end can pass locating piece and pressure receiving piece one side butt that keeps away from the elastic component.

Preferably, the limiting piece is in threaded connection with the flow guiding piece.

As a preferable scheme, the position of the pressed piece corresponding to the push rod is provided with a positioning groove, and one end of the push rod is movably inserted into the positioning groove.

As the preferable scheme, the perisporium of pressure regulating handle and perisporium threaded connection of cavity, the recess has been seted up to pressure regulating handle near elastic component one end, the elastic component is located the recess, just elastic component one end and the bottom surface butt of recess.

Preferably, the flow guiding piece is in threaded connection with the relay body.

Preferably, the sealing ring is a steter sealing ring.

The pressure relay disclosed by the utility model has the beneficial effects that: through set up the gasket in sealing washer one side that is close to the pressurized spare, when hydraulic oil passes through the drainage mouth and gets into behind the spout promote the push rod towards the direction that is close to the pressurized spare and remove, the sealing washer can receive the frictional force from two different directions in terminal surface and bottom surface under the drive of push rod, because smooth characteristic in gasket surface, the frictional force from the terminal surface will infinitely be close to zero, the frictional force from the bottom surface will produce the holding force to the push rod, provide and support and keep with push rod sealing connection, the gasket can play the effect of protection sealing washer, thereby can prevent that the sealing washer from breaking even breaking, the life of extension sealing washer, the production of avoiding the accident.

Drawings

Fig. 1 is a schematic view of a pressure relay according to the present utility model.

Fig. 2 is a schematic view of a part of the structure of a pressure relay according to the present utility model.

10. A relay body; 11. a cavity; 20. a flow guide; 21. a drainage port; 22. a chute; 23. a limiting piece; 30. a pressure receiving member; 40. an elastic member; 50. a pressure regulating handle; 60. a micro-switch; 61. an electrical plug; 70. a push rod; 80. a seal ring; 90. a gasket.

Detailed Description

The utility model is further illustrated and described below in conjunction with the specific embodiments and the accompanying drawings:

referring to fig. 1 and 2, a pressure relay includes a relay body 10, a cavity 11 is provided at one end of the relay body 10, a guide piece 20 is inserted at the other end of the relay body 10, the guide piece 20 is in threaded connection with the relay body 10, a pressure receiving piece 30 is slidably provided at one end of the cavity 11 adjacent to the guide piece 20, an elastic piece 40 is provided in the cavity 11, one end of the elastic piece 40 is in abutment with the pressure receiving piece 30, a pressure regulating handle 50 is provided at the other end of the elastic piece 40, the pressure regulating handle 50 is used for regulating the compression amount of the elastic piece 40, a micro switch 60 is provided on the surface of the relay body 10, a contact of the micro switch 60 is in contact with the pressure receiving piece 30, a guide port 21 is provided at one end of the guide piece 20 adjacent to the pressure receiving piece 30, a chute 22 is communicated with the guide port 21, a push rod 70 is slidably provided in the chute 22, one end of the push rod 70 is in abutment with one side of the pressure receiving piece 30 adjacent to the elastic piece 40, a seal groove is provided at the peripheral wall of the chute 22, a seal 80 is provided in the seal groove, the seal 80 is a seal 80, the seal 80 is in sliding connection with the peripheral wall of the push rod 70, and one side of the seal 80 adjacent to the pressure receiving piece 30 is provided with a seal 90.

As can be seen from the above description, after the adjusting handle adjusts the compression amount of the elastic member 40, i.e. the pressure value is set, hydraulic oil enters the chute 22 through the drainage port 21 and then pushes the push rod 70 to move towards the direction close to the pressure receiving member 30, the stell seal ring 80 is driven by the push rod 70 to receive friction forces from two different directions of the end face and the bottom face, the friction force from the end face is infinitely close to zero due to the smooth surface of the gasket 90, the friction force from the bottom face can generate holding force on the push rod 70, support and keep sealing connection with the push rod 70, the push rod 70 pushes the pressure receiving member 30 to move against the elastic force of the elastic member 40 and continue to move towards the cavity 11, so as to trigger the micro switch 60, the pressure signal is transmitted to the terminal PLC or the electromagnetic valve through the lead wire, the release pressure of the hydraulic oil pump is indirectly controlled, and when the oil pump is pressurized again, the hydraulic oil pushes the push rod 70 to act again through the drainage port 21 to form a cycle of receiving release from the signal.

Referring to fig. 2, a limiting member 23 is inserted into one end of the guiding member 20, which is close to the pressure receiving member 30, one end of the limiting member 23 abuts against the spacer 90, and one end of the push rod 70 may pass through the limiting member 23 to abut against one side of the pressure receiving member 30, which is far away from the elastic member 40. Specifically, the limiting member 23 is screwed with the flow guiding member 20.

As can be seen from the above description, the seal ring 80 and the gasket 90 are fixed in the seal groove through the limiting member 23, and the limiting member 23 is screwed into the guiding member 20, so that the lateral extrusion degree of the seal ring 80 and the gasket 90 can be adjusted by adjusting the screwing depth of the limiting member 23, and the sealing effect is improved.

Referring to fig. 2, a positioning slot is formed at a position of the compression member 30 corresponding to the push rod 70, and one end of the push rod 70 is movably inserted into the positioning slot.

As can be seen from the above description, one end of the push rod 70 is inserted into the positioning slot, and the stability of the push rod 70 in pushing the compression member 30 is improved by the cooperation of the positioning slot and the compression member 30.

Referring to fig. 1, the peripheral wall of the pressure regulating handle 50 is in threaded connection with the peripheral wall of the cavity 11, one end of the pressure regulating handle 50, which is close to the elastic member 40, is provided with a groove, the elastic member 40 is located in the groove, and one end of the elastic member 40 abuts against the bottom surface of the groove.

As can be seen from the above description, the adjusting handle has one end screwed into the cavity 11, which is convenient to fix and adjust the screwing depth, so as to adjust the compression amount of the elastic member 40 and modify the pressure value, and the elastic member 40 is disposed in the groove of the adjusting handle, so that the elastic member 40 is convenient to install and position, and the stability of the overall structure is improved.

The utility model provides a pressure relay, which is characterized in that after the compression amount of an elastic piece is regulated by an adjusting handle, namely, after the pressure value is set, hydraulic oil enters a chute through a drainage port and then pushes a push rod to move towards a direction close to a pressure receiving piece, a Style sealing ring is driven by the push rod to receive friction forces from two different directions of an end face and a bottom face, the friction force from the end face is infinitely close to zero due to the smooth characteristic of the surface of a gasket, the friction force from the bottom face can generate holding force on the push rod, support is provided and kept in sealing connection with the push rod, the push rod pushes the pressure receiving piece to move against the elastic force of the elastic piece and continuously move towards a cavity, so as to trigger a micro switch, the micro switch transmits a pressure signal to a terminal PLC or an electromagnetic valve through an electric plug, and indirectly controls the release pressure of a hydraulic oil pump, and when the oil pump is pressurized again, the hydraulic oil pushes the push rod to act through the drainage port to form a cycle from the signal to release.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.

Claims (7)

1. The utility model provides a pressure relay, its characterized in that, includes the relay body, the cavity has been seted up to relay body one end, the relay body other end grafting has the water conservancy diversion piece, the cavity is close to water conservancy diversion piece one end and slides and be equipped with the pressurized piece, be equipped with the elastic component in the cavity, elastic component one end and pressurized piece butt, the elastic component other end is equipped with the pressure regulating handle, the pressure regulating handle is used for adjusting the compression volume of elastic component, the surface of relay body is equipped with micro-gap switch, micro-gap switch's contact contacts with the pressurized piece, the water conservancy diversion piece has been kept away from pressurized piece one end and has been seted up the drainage mouth, the spout has been seted up with the drainage mouth intercommunication to water conservancy diversion piece be close to pressurized piece one end, push rod one end can keep away from elastic component one side butt with pressurized piece, the sealing groove has been seted up to the perisporium of spout, be equipped with the sealing washer in the sealing washer, sealing washer and the perisporium sealing sliding connection of push rod, sealing washer is close to pressurized piece one side.

2. The pressure relay of claim 1, wherein the end of the flow guiding member, which is close to the pressure receiving member, is inserted with a limiting member, one end of the limiting member is abutted against the gasket, and one end of the push rod can pass through the limiting member to be abutted against one side, which is far away from the elastic member, of the pressure receiving member.

3. A pressure relay as claimed in claim 2, wherein the stop member is threadably connected to the deflector member.

4. The pressure relay of claim 1, wherein the pressure receiving member is provided with a positioning groove corresponding to the push rod, and one end of the push rod is movably inserted into the positioning groove.

5. The pressure relay of claim 1, wherein the peripheral wall of the pressure regulating handle is in threaded connection with the peripheral wall of the cavity, a groove is formed in one end of the pressure regulating handle, which is close to the elastic element, the elastic element is located in the groove, and one end of the elastic element is abutted against the bottom surface of the groove.

6. A pressure relay according to claim 1, wherein the deflector is threadably connected to the relay body.

7. A pressure relay according to claim 1, wherein the sealing ring is a stirling sealing ring.