CN215634127U

CN215634127U - Pressure relief valve state detection structure of electric hydraulic pipe fitting machining tool

Info

Publication number: CN215634127U
Application number: CN202121711868.4U
Authority: CN
Inventors: 蒋友荣
Original assignee: Zhejiang Value Mechanical & Electrical Products Co ltd
Current assignee: Zhejiang Value Mechanical & Electrical Products Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-01-25
Anticipated expiration: 2031-07-26
Also published as: WO2023005861A1

Abstract

The utility model discloses a pipe fitting processing tool, and provides a pressure relief valve state detection structure of an electric hydraulic pipe fitting processing tool, which has a simple structure and can synchronously and accurately control the pipe fitting processing tool to stop when a pressure relief valve is opened, so that the use safety and reliability of the pipe fitting processing tool are improved, and the technical problems that the opening of the pressure relief valve is easily judged by mistake in the normal working process of the pipe fitting processing tool in the prior art, the abnormal stop phenomenon is caused and the like are solved.

Description

Pressure relief valve state detection structure of electric hydraulic pipe fitting machining tool

Technical Field

The utility model relates to a pipe fitting machining tool, in particular to a pressure relief valve state detection structure of an electric hydraulic pipe fitting machining tool, which is simple in structure and capable of synchronously and accurately controlling the pipe fitting machining tool to stop when a pressure relief valve is opened, so that the use safety and reliability of the pipe fitting machining tool are improved.

Background

In the existing electric hydraulic tools, such as electric hydraulic tube expanders, hydraulic tongs and the like, part of products adopt the change of monitoring motor current to judge whether a machine finishes work. The working principle is as follows: the motor passes through drive mechanism drive plunger and lasts pump oil to the working chamber, and the pressure increases along with the load in the working chamber and lasts and rises, and motor current also can last to rise, and after the pressure reached relief valve cracking pressure when the working chamber internal pressure, the outside removal of relief valve case, the working chamber internal hydraulic oil flowed into the oil storage chamber through the relief valve, and the working chamber internal pressure sharply descends this moment, and motor current also descends fast thereupon, and monitoring circuit detects the control motor automatic shutdown after the electric current descends fast. The control method has the following disadvantages: because the driving structure adopts the eccentric wheel to drive, the eccentric wheel rotates a circle to drive the plunger once, the driving load is the change process from small to large to small, the current can correspondingly change, the fluctuation can lead to the misjudgment of the monitoring circuit, or the shutdown is carried out when the pressure release valve is not opened, if the sensitivity of the monitoring circuit is reduced, the automatic shutdown can not be carried out after the pressure release valve is opened, and the use safety and reliability of the pipe fitting machining tool are reduced.

Disclosure of Invention

The utility model mainly provides the pressure relief valve state detection structure of the electric hydraulic pipe machining tool, which is simple in structure and can synchronously and accurately control the pipe machining tool to stop when the pressure relief valve is opened, so that the use safety and reliability of the pipe machining tool are improved, and the technical problems that the pipe machining tool is easy to misjudge that the pressure relief valve is opened in the normal working process, further the abnormal stop phenomenon is caused and the like in the prior art are solved.

The technical problem of the utility model is mainly solved by the following technical scheme: the pressure relief valve state detection structure of the electric hydraulic pipe fitting machining tool comprises a body and a pressure relief valve cavity arranged on the body, wherein a pressure relief valve is connected in the pressure relief valve cavity in a sliding mode, a trigger member is arranged outside a valve core of the pressure relief valve, the trigger member is electrically connected with a control system, the trigger member is triggered when the valve core moves outwards, and the control system controls the electric hydraulic pipe fitting machining tool to stop according to a trigger signal of the trigger member. The control system can automatically control the electric hydraulic pipe fitting machining tool to stop according to the trigger signal of the trigger component, has a simple structure, can synchronously and accurately control the pipe fitting machining tool to stop when the pressure relief valve is opened, cannot cause the phenomenon of stop by misjudgment, has high reliability, and improves the use safety of the pipe fitting machining tool.

Preferably, the trigger member is a detection switch electrically connected to the control system. When the trigger component is a detection switch, the structure is simple, the cost is low, and the safety is easy.

More preferably, the detection switch is fixed to a body corresponding to an outer end of the valve body. The valve core directly triggers the detection switch, and the structure is more refined under the condition that the space of the whole machine allows.

More preferably, the outer side end of the valve core or the body corresponding to the outer side end of the valve core is provided with a spring sheet, when the valve core moves outwards, the spring sheet is driven to move outwards, and the detection switch is fixed on the body corresponding to the outer side of the spring sheet. The outer end part of the valve core is provided with an elastic sheet, when the pressure relief valve starts to relieve pressure, the outward movement process of the valve core pushes the elastic sheet to move outwards or deform and move outwards, the elastic sheet abuts against the detection switch, the detection switch is triggered, the control system detects that the detection switch triggers and controls the motor to stop, after the motor is stopped, hydraulic oil in the working cavity completely flows into the oil storage cavity through the pressure relief valve cavity, the valve core of the pressure relief valve moves inwards under the action of the reset spring, the pressure relief valve is closed, and the elastic sheet resets under the action of the elastic force of the pressure relief valve. The detection switch is triggered through the elastic sheet, so that the space structure is optimized, and the structure of the whole machine is more compact and reasonable.

Preferably, the trigger member includes a first elastic conductor and a second elastic conductor electrically connected to the control system, one end of the first elastic conductor and one end of the second elastic conductor are fixed to the first insulator, and the other end of the first elastic conductor is brought into contact with the second elastic conductor when the valve element moves outward. The trigger component is formed by clamping an insulator between the two elastic conductors, and the valve core drives one of the elastic conductors to elastically deform and then to abut against the other elastic conductor to form a loop, so that a trigger signal is formed, and optimization of a space structure is facilitated.

Preferably, the trigger member includes an electrical conductor electrically connected to the control system, the electrical conductor is fixed to the body via a second insulator, the body is also electrically connected to the control system, and the spool abuts against the electrical conductor when moving outward. The trigger component is formed by clamping the insulator between the conductor and the body, so that the valve core can form a loop when touching the conductor, and further forms a touch signal, and the structure is more simplified.

Therefore, the pressure relief valve state detection structure of the electro-hydraulic pipe machining tool has the following advantages: the trigger component electrically connected with the control system is arranged outside the valve core of the pressure release valve, the trigger component can be a detection switch and two elastic electric conductors insulated from each other, or structural forms such as a body and an electric conductor insulated from the body are utilized, the trigger component is triggered when the valve core moves outwards, the control system can automatically control the electric hydraulic pipe fitting machining tool to stop according to a trigger signal of the trigger component, the structure is simple, the pressure release valve synchronously and accurately controls the pipe fitting machining tool to stop when being opened, the phenomenon of stopping by misjudgment can not occur, the safety and reliability are high, and the service performance of the pipe fitting machining tool is ensured.

Description of the drawings:

FIG. 1 is a schematic structural view of a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a second embodiment of the present invention;

FIG. 3 is a schematic structural view of a third embodiment of the present invention;

fig. 4 is a schematic configuration diagram of a fourth embodiment of the present invention.

The specific implementation mode is as follows:

the technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

Example 1:

as shown in figure 1, the pressure relief valve state detection structure of the electro-hydraulic pipe machining tool comprises a body 1 of the pipe machining tool, wherein the body 1 is provided with a pressure relief valve cavity 4, a pressure relief valve 2 is connected in the pressure relief valve cavity 4 in a sliding manner, a port of the pressure relief valve cavity 4 is provided with a trigger member, the trigger member is electrically connected with a control system 3, the trigger member in the embodiment is a detection switch 5, an elastic sheet 6 (the elastic sheet 6 can also be directly fixed on the outer side end of a valve core 21) is arranged on the body 1 corresponding to the lower part of the outer side end of the valve core 21, the upper end part of the elastic sheet 6 extends out of the outer end surface of the valve core 21, the middle part of the elastic sheet 6 extends outwards to form an arc contact, the detection switch 5 is fixed on the body 1 opposite to the arc contact, a gap is formed between the arc contact and the detection switch 5, the elastic sheet 6 is driven to deform and move outwards when the valve core 21 moves outwards, the arc contact touches the detection switch 5, the control system 3 controls the electric hydraulic pipe fitting processing tool to automatically stop according to the touch signal of the detection switch 5.

Example 2:

as shown in fig. 2, the spring 6 in the embodiment is removed, the detection switch 5 is directly fixed on the body 1 opposite to the outer end of the valve core 21, the outer end of the valve core 21 touches the detection switch 5 when moving outwards, and the control system 3 controls the automatic stop of the electric hydraulic pipe machining tool according to the touch signal of the detection switch 5. The rest is exactly the same as in example 1.

Example 3:

as shown in fig. 3, the trigger member includes a first elastic conductor 71 and a second elastic conductor 72 electrically connected to the control system 3, the first elastic conductor 71 and the second elastic conductor 72 are arranged in parallel, upper ends of the first elastic conductor 71 and the second elastic conductor 72 are fixed to both sides of a first insulator 73, a lower end of the first elastic conductor 71 is located outside an end of the valve element 21, and when the valve element 21 moves outward, the lower end of the first elastic conductor 71 is brought into contact with the second elastic conductor 72, and in order to ensure that the first elastic conductor 71 and the second elastic conductor 72 are in good contact, an arc-shaped contact extending inward is provided at a lower end of the first elastic conductor 71 or the second elastic conductor 72. The rest is exactly the same as in example 1.

Example 4:

as shown in fig. 4, the trigger member includes a conductor 81 electrically connected to the control system 3, a lower end of the conductor 81 is fixed to the corresponding body 1 below the valve body 21 via a second insulator 82, an upper end thereof extends to the outside of the end of the valve body 21, the body 1 is also electrically connected to the control system 3, and the valve body 21 abuts against the conductor 81 when moving outward. The rest is exactly the same as in example 1.

The specific embodiments described herein are merely illustrative of the principles of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a pressure relief valve state detection structure of electronic hydraulic pressure pipe fitting machining tool, includes body (1) and locates pressure relief valve pocket (4) on body (1), sliding connection is being released pressure valve (2), its characterized in that in pressure relief valve pocket (4): a trigger component is arranged outside a valve core (21) of the pressure relief valve (2), the trigger component is electrically connected with the control system (3), the trigger component is triggered when the valve core (21) moves outwards, and the control system (3) controls the electric hydraulic pipe fitting machining tool to stop according to a trigger signal of the trigger component.

2. The pressure relief valve state detection structure of an electro-hydraulic pipe machining tool according to claim 1, characterized in that: the trigger component is a detection switch (5) electrically connected on the control system (3).

3. The pressure relief valve state detection structure of an electro-hydraulic pipe fitting machining tool according to claim 2, characterized in that: the detection switch (5) is fixed on the body (1) corresponding to the outer side end of the valve core (21).

4. The pressure relief valve state detection structure of an electro-hydraulic pipe fitting machining tool according to claim 2, characterized in that: the outer side end of the valve core (21) or the body (1) corresponding to the outer side end of the valve core (21) is provided with an elastic sheet (6), the valve core (21) drives the elastic sheet (6) to move outwards when moving outwards, and the detection switch (5) is fixed on the body (1) corresponding to the outer side of the elastic sheet (6).

5. The pressure relief valve state detection structure of an electro-hydraulic pipe machining tool according to claim 1, characterized in that: the trigger component comprises a first elastic conductor (71) and a second elastic conductor (72) which are electrically connected to the control system (3), one end of the first elastic conductor (71) and one end of the second elastic conductor (72) are fixed on the first insulator (73), and when the valve core (21) moves outwards, the other end of the first elastic conductor (71) is driven to abut against the second elastic conductor (72).

6. The pressure relief valve state detection structure of an electro-hydraulic pipe machining tool according to claim 1, characterized in that: the trigger member comprises a conductor (81) electrically connected to the control system (3), the conductor (81) is fixed on the body (1) through a second insulator (82), the body (1) is also electrically connected to the control system (3), and the valve core (21) abuts against the conductor (81) when moving outwards.