CN113524775A - Pressure regulator for press balancer - Google Patents

Abstract

The invention belongs to the technical field of pressure machine air pressure control equipment, and relates to an air pressure adjusting device of a pressure machine balancer, which comprises a first branch, a second branch and a fourth branch which are arranged in parallel, wherein one ends of the first branch, the second branch and the fourth branch are connected with a main air source, the other ends of the first branch, the second branch and the fourth branch are connected with a fifth branch and a sixth branch which are arranged in parallel, the fifth branch is connected with a balancer air storage cylinder, a pressure detection device is arranged on the balancer air storage cylinder, reversing valves are arranged on the first branch, the second branch, the fourth branch and the sixth branch, and the reversing valves and the pressure detection device are connected with a host PLC (programmable logic controller). The invention provides a manual-automatic integrated dual pressure regulating system which has the advantages of rapid action, sensitive response, simple maintenance, safe use, manual regulation and automatic regulation, can prevent the air pressure fluctuation of a balancer air path system and ensure the stability and sustainability of the air pressure of the balancer, has great market value and is worthy of wide popularization and application.

Description

Pressure regulator for press balancer

Technical Field

The invention belongs to the technical field of press machine air pressure control equipment, and particularly relates to an air pressure adjusting device of a press machine balancer.

Background

The mechanical press must be calibrated with a balancer. The balancer is used for balancing the weights of the connecting rod, the sliding block, the upper die and the like and enabling the sliding block to move up and down smoothly; on the other hand, the vibration and the noise of the machine tool can be reduced, and sudden accidents caused by plunger breakage are prevented. Because the air type balancer has simple structure, low manufacturing cost, convenient installation and low failure rate, the common mainstream press machine adopts the air type balancer. The balancing force of the air balancing cylinder is equal to the compressed air pressure times the piston area. Therefore, the air pressure in the cylinder of the balancer can be adjusted to enable the balancer to generate enough balancing force to balance with the weight of the sliding block and the weight of the installed die, all rotating pairs of the main transmission system are always kept in contact, and impact is avoided. However, in order to save the manufacturing cost, some air supply systems of the balancer directly abandon the air cylinder, so the air pressure fluctuation of the air path system of the balancer is increased, and the stability of the working performance of the balancer cannot be guaranteed; the pressure control of some balancer air supply systems is manual operation, the pressure of a pressure gauge on a pressure reducing valve is periodically checked manually to judge the air supply pressure of the balancer, and proper manual adjustment is carried out, so that the air path system does not realize full-automatic intelligent control, and after the balance is finished; some balancer air supply systems, although implementing automatic control, do not take into account the risks associated with abnormal failure of the electrical components, so that once a problem occurs in the automatic control system, the entire balancer cannot operate and the machine must be shut down.

Disclosure of Invention

The invention aims to solve the problem that the pressure control of an air supply system of a press balancer is limited in the prior art, and provides an air pressure adjusting device of the press balancer.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the pressure adjusting device for the press balancer comprises a first branch, a second branch and a fourth branch which are arranged in parallel, wherein one end of the first branch, one end of the second branch and one end of the fourth branch are connected with a main gas source, the other end of the first branch is connected with a fifth branch and a sixth branch which are arranged in parallel, the fifth branch is connected with a balancer gas cylinder, a pressure detecting device is arranged on the balancer gas cylinder, reversing valves are arranged on the first branch, the second branch, the fourth branch and the sixth branch, and the reversing valves and the pressure detecting device are connected with a host PLC.

Preferably, the first branch is connected with a first ball valve, a first reversing valve and a first one-way valve in sequence.

Preferably, the second branch is connected with a second ball valve, a second reversing valve and a second one-way valve in sequence.

Preferably, the fourth branch is connected with a third ball valve, a fourth ball valve, a third reversing valve, a pneumatic control pressure reducing valve and a third one-way valve in sequence.

Preferably, the fourth branch is connected with a third branch, the third branch is provided with a manual pressure reducing valve, one end of the third branch is connected between the third ball valve and the fourth ball valve, and the other end of the third branch is connected with a pneumatic control pressure reducing valve.

Preferably, the sixth branch is sequentially connected with a fifth ball valve and a fourth reversing valve.

Preferably, a silencer is connected to the end of the sixth branch.

Preferably, the pressure detection device comprises a pressure gauge, a pressure relay and a high-precision digital pressure switch, and the high-precision digital pressure switch is connected with the host PLC.

Preferably, the balancer air cylinder is supplied with air through a fifth branch and supplies the air to the balancer, and a high-pressure protection safety valve and a low-pressure protection pressure switch are further arranged on the balancer air cylinder.

Preferably, the reversing valve is a two-position two-way electromagnetic valve.

After the technical scheme is adopted, the pressure adjusting device for the press balancer provided by the invention has the following beneficial effects:

according to the invention, through the design that the reversing valve and the pressure detection device are connected with the host PLC, the host PLC can control the opening or closing of the reversing valve on each branch road according to the pressure in the air storage cylinder of the balancer, so that the automatic air supply or automatic air release of the air storage cylinder of the balancer is realized, namely, the automatic pressurization or decompression of the air storage cylinder of the balancer is realized; through the design of the third branch and the fourth branch, when the automatic pressure regulating system fails, a manual line can be switched, and the pressure on the fourth branch is regulated through a manual pressure reducing valve, so that the manual control of the pressure in the air storage cylinder of the balancer is realized; through the design of the silencer on the sixth branch, the noise generated when redundant gas in the air storage cylinder of the balancer is discharged into the atmosphere can be reduced, the noise of the whole machine tool can be reduced to a certain extent, and the noise of the machine tool can be helped to reach the range of the national standard; through the design of the ball valves on the branches, the branches of the air sources can be manually disconnected from the main air source, so that the maintenance and the overhaul of the air path elements are facilitated for workers, and the safety of the workers is ensured; through the design of the high-pressure protection safety valve, the high-precision digital pressure switch can be prevented from being failed and not feeding back a signal to the two-position two-way electromagnetic valve of the sixth branch circuit through the host PLC to exhaust in time, so that the danger of explosion of the air cylinder caused by overhigh pressure of the air cylinder of the balancer is avoided, and double safety insurance can be realized; through the design of the low-voltage protection pressure switch, the high-precision digital pressure switch can be prevented from being broken down, signals are not fed back to the two-position two-way electromagnetic valve of the second branch circuit through the host PLC for supplying air in time, the slide block slides down due to too low pressure of the air storage cylinder of the balancer, and the risk of warning machine tool operators to check system elements in time can be avoided; in conclusion, the invention provides the manual-automatic integrated dual pressure regulating system which has the advantages of rapid action, sensitive response, simple maintenance, safe use, manual regulation and automatic regulation, can prevent the air pressure fluctuation of the air path system of the balancer, ensures the air pressure stability and sustainability of the balancer, has great market value and is worthy of wide popularization and application.

Drawings

Fig. 1 is a schematic structural diagram of a pressure regulator of a press balancer according to the present invention.

Wherein: the high-pressure protection device comprises a first branch 1, a second branch 2, a third branch 3, a fourth branch 4, a fifth branch 5, a sixth branch 6, a main gas source 7, a balancer gas storage cylinder 8, a first ball valve 9, a first reversing valve 10, a first check valve 11, a second ball valve 12, a second reversing valve 13, a second check valve 14, a third ball valve 15, a fourth ball valve 16, a third reversing valve 17, a pneumatic control pressure reducing valve 18, a third check valve 19, a manual pressure reducing valve 20, a fifth ball valve 21, a fourth reversing valve 22, a silencer 23, a pressure gauge 24, a pressure relay 25, a high-precision digital pressure switch 26, a balancer 27 and a high-pressure protection safety valve 28.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings and detailed description, in which it is to be understood that the embodiments described are merely illustrative of some, but not all embodiments of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The invention relates to an air pressure adjusting device of a press balancer, which comprises a first branch 1, a second branch 2 and a fourth branch 4 which are arranged in parallel as shown in figure 1, wherein one ends of the first branch 1, the second branch 2 and the fourth branch 4 are connected with a main air source 7, and the other ends of the first branch 1, the second branch 2 and the fourth branch 4 are connected with a fifth branch 5 and a sixth branch 6 which are arranged in parallel.

Specifically, a pressure gauge is connected to the main gas source 7, a first ball valve 9, a first reversing valve 10 and a first one-way valve 11 are sequentially connected to the first branch 1, the second branch 2 is connected with a second ball valve 12, a second reversing valve 13 and a second one-way valve 14 in sequence, the fourth branch 4 is connected with a third ball valve 15, a fourth ball valve 16, a third reversing valve 17, a pneumatic control pressure reducing valve 18 and a third one-way valve 19 in sequence, the fourth branch 4 is connected with a third branch 3, the third branch 3 is provided with a manual pressure reducing valve 20, and one end of the third branch 3 is connected between the third ball valve 15 and the fourth ball valve 16, the other end is connected with a pneumatic control pressure reducing valve 18, the input ends of the first ball valve 9, the second ball valve 12 and the third ball valve 15 are connected in parallel and then communicated with the main gas source 7, the output ends of the first check valve 11, the second check valve 14 and the third check valve 19 are connected in parallel and then connected with the fifth branch 5 and the sixth branch 6 which are arranged in parallel.

The fifth branch 5 is connected with a balancer air cylinder 8, the balancer air cylinder 8 is supplied with air through the fifth branch 5 and supplies the air to a balancer 27, a pressure detection device is arranged on the balancer air cylinder 8 and comprises a pressure gauge 24, a pressure relay 25 and a high-precision digital pressure switch 26, maintenance personnel can check the pressure of the system through the pressure gauge 24 on the balancer air cylinder 8 when the pressure gauge of the main air source 7 fails and cannot check the pressure of the system through the arrangement of the pressure gauge 24, a high-pressure protection safety valve 28 and a low-pressure protection pressure switch are further arranged on the balancer air cylinder 8, a fifth ball valve 21 and a fourth reversing valve 22 are sequentially connected onto the sixth branch 6, and the tail end of the sixth branch 6 is connected with a silencer 23.

And the first reversing valve 10 on the first branch 1, the second reversing valve 13 on the second branch 2, the third reversing valve 17 on the fourth branch 4, the fourth reversing valve 22 on the sixth branch 6 and the high-precision digital pressure switch 26 in the pressure detection device are all connected with a host PLC.

Further, the first direction valve 10, the second direction valve 13, the third direction valve 17 and the fourth direction valve 22 are two-position two-way solenoid valves.

When the pressure machine balancer air pressure adjusting device is ready to start, the first ball valve 9, the second ball valve 12, the fourth ball valve 16 and the fifth ball valve 21 are opened manually and kept in a normally open state, and the third ball valve 15 is kept in a normally closed state, so that the first branch 1 and the second branch 2 are communicated with the main air source 7, and the third branch 3 and the fourth branch 4 are not communicated with the main air source 7.

In formal work, the host PLC program receives a command to connect the first directional valve 10 on the first branch 1 and the high-precision digital pressure switch 26 on the balancer gas storage cylinder 8, and the second directional valve 13 on the second branch 2 and the fourth directional valve 22 on the sixth branch 6 are not connected, at this time, the first directional valve 10 on the first branch 1 moves to the left, while the second directional valve 13 on the second branch 2 and the fourth directional valve 22 on the sixth branch 6 are still in the original position, and since the third ball valve 15 in front of the third branch 3 and the fourth branch 4 is not opened, the second branch 2, the third branch 3, the fourth branch 4 and the sixth branch 6 are all in the blocked state, so that the gas source can only go to the fifth branch 5 along the first branch 1 and is sent into the balancer 27 through the balancer gas storage cylinder 8, and the balancer 27 starts to work.

The balancer air cylinder 8 is a necessary element for preventing air pressure fluctuation and ensuring that the sliding block does not slide downwards, therefore, a high-precision digital pressure switch 26 on the balancer air cylinder 8 is always connected with a host PLC, when the high-precision digital pressure switch 26 detects that the pressure in the balancer air cylinder 8 is too low, a signal is fed back to the host PLC, the host PLC controls a second reversing valve 13 on a second branch 2 to be switched on and move to the left position, the second branch 2 is switched on, then compressed air of a main air source can supply air to the balancer air cylinder 8 along the first branch 1 and the second branch 2 simultaneously, at the moment, the balancer air cylinder 8 realizes automatic air supply, the air storage amount in the balancer air cylinder 8 is ensured to reach a certain range, and pressurization is realized; on the contrary, when the high-precision digital pressure switch 26 detects that the pressure in the balancer air cylinder 8 is too high, a signal is fed back to the host PLC, the host PLC controls the first reversing valve 10 on the first branch 1 and the second reversing valve 13 on the second branch 2 to move to the original positions, and controls the fourth reversing valve 22 on the sixth branch 6 to move to the left position, and at the moment, the first branch 1, the second branch 2 and the fourth branch 4 are provided with one-way valves so as not to pass through, so that redundant gas in the balancer air cylinder 8 can only be discharged to the atmosphere through the muffler 23 on the sixth branch 6, and certainly, the high-pressure protection safety valve 28 on the balancer air cylinder 8 can also discharge a part of redundant compressed air to realize pressure reduction; thus, the automatic air supply and the automatic air discharge of the balancer air storage cylinder 8 are realized through the host PLC, and the automatic pressurization and the pressure reduction of the balancer air storage cylinder 8 are realized.

When the first reversing valve 10 on the first branch 1, the second reversing valve 13 on the second branch 2, the fourth reversing valve 22 on the sixth branch 6 and the high-precision digital pressure switch 26 on the balancer air cylinder 8 fail to feed back signals to the host PLC, but the air pressure in the balancer air cylinder 8 still needs to be controlled within a required range, a manual pressure regulating mode needs to be started, the first ball valve 9 on the air source branch 1, the second ball valve 12 on the second branch 2 and the fifth ball valve 21 on the sixth branch 6 are manually closed, the third ball valve 15 is opened, the host PLC is connected with the third reversing valve 17 on the fourth branch 4, the third reversing valve 17 moves to the left position, at the moment, the air source branch 1, the second branch 2 and the sixth branch 6 are not communicated, and air can only reach the balancer air cylinder 8 along the fourth branch 4, because the pressure of the pneumatic control pressure reducing valve 18 on the fourth branch 4 is controlled by the manual pressure reducing valve 20 on the third branch 3, the pressure on the fourth branch 4 is adjusted by manually adjusting the pressure of the manual pressure reducing valve 20 on the third branch 3, and the air pressure in the balancer air storage cylinder 8 is adjusted within a reasonable range, so that the manual control of the pressure in the balancer air storage cylinder 8 is realized.

It should be noted that, in the present invention, the manual pressure reducing valve 20 is installed on the left front pillar of the machine tool, and other branches of the balancer air pressure adjusting device are installed in the ground, so that the manual pressure adjusting device can be used for the operator to remotely and manually adjust the system pressure on the ground without getting down the ground.

In summary, the pressure regulating device for the press balancer provided by the invention can realize that the host PLC controls the opening or closing of the reversing valves on the branches according to the pressure in the balancer air storage cylinder 8 by the design that the reversing valves and the pressure detecting device are connected with the host PLC, so that the automatic air supply or automatic air release of the balancer air storage cylinder 8 is realized, that is, the automatic pressurization or decompression of the balancer air storage cylinder 8 is realized; through the design of the third branch 3 and the fourth branch 4, when the automatic pressure regulating system fails, a manual line can be switched, and the pressure on the fourth branch 4 is regulated through the manual pressure reducing valve 20, so that the manual control of the pressure in the air storage cylinder 8 of the balancer is realized; through the design of the silencer 23 on the sixth branch 6, the noise generated when the redundant gas in the air storage cylinder 8 of the balancer is discharged into the atmosphere can be reduced, the noise of the whole machine tool can be reduced to a certain extent, and the noise of the machine tool can be helped to reach the national standard range; through the design of the ball valves on the branches, the branches of the air sources can be manually disconnected from the main air source 7, so that the maintenance and overhaul of the air path elements are facilitated for workers, and the safety of the workers is ensured; through the design of the high-pressure protection safety valve 28, the danger that the air storage cylinder explodes due to the fact that the pressure of the balancer air storage cylinder 8 is too high when the high-precision digital pressure switch 26 fails and does not feed back a signal to the two-position two-way electromagnetic valve of the sixth branch 6 through the host PLC to exhaust in time can be prevented, and double safety insurance can be realized; through the design of the low-voltage protection pressure switch, the high-precision digital pressure switch 26 can be prevented from being broken down and not feeding back a signal to the two-position two-way electromagnetic valve of the second branch 2 through the host PLC for timely air supplement, and the danger that the slide block slides down due to too low pressure of the balancer air storage cylinder 8 occurs, so that the alarm can be given in time to remind a machine tool operator to check system elements; in conclusion, the invention provides the manual-automatic integrated dual pressure regulating system which has the advantages of rapid action, sensitive response, simple maintenance, safe use, manual regulation and automatic regulation, can prevent the air pressure fluctuation of the air path system of the balancer, ensures the air pressure stability and sustainability of the balancer, has great market value and is worthy of wide popularization and application.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. The utility model provides a press balancer atmospheric pressure adjusting device which characterized in that: the air pressure balancer is characterized by comprising a first branch (1), a second branch (2) and a fourth branch (4) which are arranged in parallel, wherein one end of the first branch (1), one end of the second branch (2) and one end of the fourth branch (4) are connected with a main air source (7), the other end of the first branch (1), one end of the second branch (2) and one end of the fourth branch (4) are connected with a fifth branch (5) and a sixth branch (6) which are arranged in parallel, the fifth branch (5) is connected with a balancer air cylinder (8), a pressure detection device is arranged on the balancer air cylinder (8), reversing valves are arranged on the first branch (1), the second branch (2), the fourth branch (4) and the sixth branch (6), and the reversing valves and the pressure detection device are connected with a host PLC.

2. The press balancer air pressure adjusting apparatus according to claim 1, wherein: the first branch (1) is sequentially connected with a first ball valve (9), a first reversing valve (10) and a first one-way valve (11).

3. The press balancer air pressure adjusting apparatus according to claim 1, wherein: and the second branch (2) is sequentially connected with a second ball valve (12), a second reversing valve (13) and a second one-way valve (14).

4. The press balancer air pressure adjusting apparatus according to claim 1, wherein: and the fourth branch (4) is sequentially connected with a third ball valve (15), a fourth ball valve (16), a third reversing valve (17), a pneumatic control pressure reducing valve (18) and a third one-way valve (19).

5. The press balancer air pressure adjusting device according to claim 4, wherein: the third branch (3) is connected to the fourth branch (4), a manual pressure reducing valve (20) is arranged on the third branch (3), one end of the third branch (3) is connected between the third ball valve (15) and the fourth ball valve (16), and the other end of the third branch is connected with a pneumatic control pressure reducing valve (18).

6. The press balancer air pressure adjusting apparatus according to claim 1, wherein: and a fifth ball valve (21) and a fourth reversing valve (22) are sequentially connected to the sixth branch (6).

7. The press balancer air pressure adjusting apparatus according to claim 1, wherein: and the tail end of the sixth branch (6) is connected with a silencer (23).

8. The press balancer air pressure adjusting apparatus according to claim 1, wherein: the pressure detection device comprises a pressure gauge (24), a pressure relay (25) and a high-precision digital pressure switch (26), and the high-precision digital pressure switch (26) is connected with a host PLC.

9. The press balancer air pressure adjusting apparatus according to claim 1, wherein: the air is fed into the balancer air storage cylinder (8) through a fifth branch (5) and is fed to a balancer (27), and a high-pressure protection safety valve (28) and a low-pressure protection pressure switch are further arranged on the balancer air storage cylinder (8).

10. The press balancer air pressure adjusting apparatus according to claim 1, wherein: the reversing valve is a two-position two-way electromagnetic valve.

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