CN219119823U

CN219119823U - Straight-through type minimum pressure valve

Info

Publication number: CN219119823U
Application number: CN202223220288.2U
Authority: CN
Inventors: 何东; 康东辉
Original assignee: Zhejiang Yigete Machinery Manufacturing Co ltd
Current assignee: Zhejiang Yigete Machinery Manufacturing Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-06-02
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a through minimum pressure valve, which comprises a valve body, valve plate (2) and piston (3), the valve body includes first pipeline (4) and second pipeline (5), first pipeline (4) and second pipeline (5) are along crossing setting of central line, be equipped with piston chamber and reset spring (6) in second pipeline (5), this piston chamber cup joints cooperation with piston (3), be connected through valve rod (11) between piston (3) and valve plate (2), reset spring (6) are used for reset piston (3), still include base (7), this base (7) are connected with second pipeline (5), this base (7) support has first guide (8), the one side axial extension that deviates from valve plate (2) of piston (3) is equipped with second guide (9), second guide (9) are connected with first guide (8) direction; the straight-through type minimum pressure valve is beneficial to further improving the stability of opening and closing movement of the valve plate.

Description

Straight-through type minimum pressure valve

Technical Field

The utility model relates to the technical field of air compressors, in particular to a straight-through type minimum pressure valve.

Background

The air compressor machine is in work such as work of breathing in, compression, and the through minimum pressure valve is one kind of the used valve of air compressor machine, and the through minimum pressure valve generally includes the valve body, sets up runner and valve plate in the valve body, makes runner intercommunication advance air through opening the valve plate, is equipped with through runner and the piston chamber that is located runner one side and the crossing setting of slant on the valve body, is equipped with the piston in the piston chamber, and the piston passes through the valve rod and connects the valve plate, and the effect of piston is through valve rod support valve plate and direction valve plate motion, and the opening condition of valve plate is that the pressure that the air compressor machine during operation produced pushes away the valve plate and opens.

In the prior art, the piston is mainly guided to open, and is pressed by the return spring, and the piston is pushed to move by the return spring so as to reset the valve plate, for example, a minimum pressure valve for an air compressor with the application publication number of CN112178247A comprises a valve body and a valve core; the valve core is in threaded connection with the valve body and is positioned in the valve body; the valve body comprises a first pipeline and a second pipeline; the included angle a between the central lines of the first pipeline and the second pipeline is smaller than 70 degrees; the first pipeline is communicated with the inner cavity of the second pipeline; the inner wall of the first pipeline is provided with an annular step; the annular step is coaxial with the second pipeline; the valve core is positioned in the second pipeline and is connected to the upper port of the second pipeline through threads. The novel flow passage mode (namely the straight-through mode) is adopted, so that the pressure loss of the flow passage is reduced, and the fluid noise is effectively reduced. The arrangement of the internal pipelines of the air compressor is facilitated by the flow channels which enter from the lower part and exit from the upper part. In this way, the pilot valve closes more quickly, preventing gas backflow.

From the above, the opening and closing movement of the valve plate plays an important role in the minimum pressure valve, that is, the performance is affected, and the applicant of the present disclosure will further optimize the through-type minimum pressure valve, so as to further improve the stability of the opening and closing movement of the valve plate.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides the straight-through type minimum pressure valve which is beneficial to further improving the stability of opening and closing movements of a valve plate.

Compared with the prior art, the utility model provides a straight-through type minimum pressure valve, which comprises a valve body, a valve plate and a piston, wherein the valve body comprises a first pipeline and a second pipeline, the first pipeline and the second pipeline are intersected along a central line, the first pipeline is communicated with an inner cavity of the second pipeline, a piston cavity and a return spring are arranged in the second pipeline, the piston cavity is in sleeved fit with the piston, the piston is connected with the valve plate through a valve rod, the return spring is used for resetting the piston, the straight-through type minimum pressure valve further comprises a base, the base is connected with the second pipeline, a first guide part is supported on the base, a second guide part is axially arranged on one side of the piston, which is far away from the valve plate, and the second guide part is in guide connection with the first guide part.

As an improvement, the first guide part is detachably connected with the tail part of the base.

As an improvement, the tail part of the base is provided with a through hole and a bolt penetrating through the through hole, and the bolt is detachably connected with the first guide part through threads.

As an improvement, the second guide portion and the valve rod are an integral rod which penetrates the piston and is fixedly connected with the piston, a portion of the integral rod located on one side of the valve plate is used as the valve rod, and a portion of the integral rod located on one side of the base is used as the second guide portion.

As an improvement, the tail part of the second guiding part is provided with a guiding hole, and the front end of the first guiding part is inserted into the guiding hole to guide the second guiding part.

As an improvement, the end of the base extends to one side of the piston, and the end face of the end serves as a positioning surface for the piston.

As an improvement, the base is in threaded connection with the second pipe, the return spring is compressed between the base and the piston cavity, and the threaded connection enables the base to change the depth of screwing into the second pipe, so that the compression degree of the return spring is adjusted.

After adopting the structure, compared with the prior art, the utility model has the following advantages: in the technical scheme disclosed by the utility model, the first guide part supported by the base guides the second guide part, and the second guide part is connected with the piston, so that the piston, the second guide part and the first guide part form stable guide for the movement of the valve plate, thereby being beneficial to further improving the stability of the opening and closing movement of the valve plate.

In addition, by adopting the technical scheme disclosed by the utility model, the piston has the additional advantages, in particular, the axial length of the piston can be reduced because the piston is not totally dependent on the guiding, the weight of the piston is reduced, and the friction between the piston and the peripheral wall of the piston cavity is reduced.

Drawings

Fig. 1 is a perspective view of a straight-through minimum pressure valve.

Fig. 2 is a top view of a straight-through minimum pressure valve.

Fig. 3 is an A-A cross-sectional view of a straight-through minimum pressure valve.

The reference numerals indicate 1-intake end, 2-valve plate, 3-piston, 4-first conduit, 5-second conduit, 6-return spring, 7-base, 8-first guide, 9-second guide, 10-bolt, 11-valve rod, 12-guide hole, 13-end.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

The present utility model is described in further detail below:

as shown in fig. 1 to 3, the through-type minimum pressure valve comprises a valve body, a valve plate 2 and a piston 3, wherein the valve body comprises a first pipeline 4 and a second pipeline 5, the first pipeline 4 and the second pipeline 5 are intersected along a central line, the first pipeline 4 is communicated with an inner cavity of the second pipeline 5, a piston cavity and a return spring 6 are arranged in the second pipeline 5, the piston cavity is in sleeved fit with the piston 3, the piston 3 is connected with the valve plate 2 through a valve rod 11, the return spring 6 is used for resetting the piston 3, when the air compressor works, the valve plate 2 is pushed away through generated air pressure, so that air enters from an air inlet end 1 at the lower end of the through-type minimum pressure valve, the valve plate 2 pushes back the piston 3, and the piston 3 compresses the return spring 6.

In the technical scheme of the disclosure, still include base 7, this base 7 is connected with second pipeline 5, and this base 7 supports has first guiding portion 8, and the one side axial extension that deviates from valve plate 2 of piston 3 is equipped with second guiding portion 9, and second guiding portion 9 is connected with the direction of first guiding portion 8.

The first pipe 4 is of a substantially straight cylindrical pipe design, and it should be noted that the straight cylindrical pipe is not required to be completely straight, but rather may be substantially straight, as shown in fig. 1 and 3, for example. When the air flows, the flow channel has smaller turning, which is beneficial to smooth ventilation.

In this example, the second duct 5 is also substantially straight, and the second duct 5 is inclined from top to bottom so as to intersect with the first duct 4, so that the exposed portion is as shown in fig. 1.

In some embodiments, to enable different guiding lengths, the first guiding portion 8 is detachably connected to the tail portion of the base 7, so that after design, the guiding length can be adjusted by replacing the first guiding portion 8 with a different length.

In this example, the preferred technical solution for detachably connecting the first guiding portion 8 with the tail portion of the base 7 is that, as shown in fig. 3, the tail portion of the base 7 is provided with a through hole and a bolt 10 passing through the through hole, and the bolt 10 is detachably screwed with the first guiding portion 8, so that the production and the assembly are more convenient.

In some embodiments, to simplify the structure and improve the integrity, as shown in fig. 3, the second guide 9 and the valve rod 11 are designed as an integral rod passing through the piston 3 and fixedly connected to the piston 3, the part of the integral rod located on the side of the valve plate 2 being the valve rod 11, and the part of the integral rod located on the side of the base 7 being the second guide 9.

In this example, as shown in fig. 3, a guide hole 12 is provided at the rear of the second guide 9, and the front end of the first guide 8 is inserted into the guide hole 12 to guide the second guide 9. After the design, the assembly is convenient.

In some embodiments, in order to achieve stroke control while simplifying the structure, in the technical solution of the present disclosure, as shown in fig. 3, an end 13 of the base 7 is specifically designed to extend to a side of the piston 3, and an end surface of the end 13 is used as a positioning surface formed by the piston 3, so that the maximum stroke of the piston 3 is determined after the assembly of the base 7 is completed.

In this case, a structural solution for adjusting the compression degree of the return spring 6 is also designed, specifically, as shown in fig. 3, the base 7 is in threaded connection with the second pipe 5, the return spring 6 is compressed between the base 7 and the piston cavity, and the threaded connection enables the base 7 to be screwed into the second pipe 5 in a variable depth, so as to adjust the compression degree of the return spring 6. Therefore, the device is convenient to adjust and has a simple and reliable structure.

In understanding the present utility model, the above-described structure may be understood together with other embodiments/drawings, if necessary, and will not be described herein.

The foregoing description is only illustrative of the present utility model and is therefore intended to cover all such modifications and changes in form, details, and materials as fall within the true spirit and scope of the utility model.

Claims

1. The utility model provides a through minimum pressure valve, including the valve body, valve plate (2) and piston (3), the valve body includes first pipeline (4) and second pipeline (5), first pipeline (4) and second pipeline (5) set up along the central line is crossing, first pipeline (4) and second pipeline (5) inner chamber intercommunication, be equipped with piston chamber and reset spring (6) in second pipeline (5), this piston chamber cup joints the cooperation with piston (3), connect through valve rod (11) between piston (3) and valve plate (2), reset spring (6) are used for reset piston (3), a serial communication port, still include base (7), this base (7) are connected with second pipeline (5), this base (7) support have first guide (8), one side axial extension that deviates from valve plate (2) of piston (3) is equipped with second guide (9), second guide (9) are connected with first guide (8) direction.

2. A straight-through minimum pressure valve according to claim 1, characterized in that the first guide part (8) is detachably connected to the tail part of the seat (7).

3. A straight-through minimum pressure valve according to claim 2, characterized in that the foot (7) is provided with a through-hole at its tail and a bolt (10) passing through the through-hole, which bolt (10) is detachably screwed with the first guide part (8).

4. A straight-through minimum pressure valve according to claim 1, characterized in that the second guide (9) is an integral rod with the valve stem (11), which integral rod passes through the piston (3) and is fixedly connected to the piston (3), the part of the integral rod located on the side of the valve plate (2) being the valve stem (11), the part of the integral rod located on the side of the seat (7) being the second guide (9).

5. A straight-through minimum pressure valve according to claim 4, characterized in that the tail of the second guide part (9) is provided with a guide hole (12), and the front end of the first guide part (8) is inserted into the guide hole (12) to guide the second guide part (9).

6. A straight-through minimum pressure valve according to claim 1, characterized in that the end (13) of the seat (7) extends to the side of the piston (3), the end face of the end (13) being the locating surface for the piston (3).

7. A straight-through minimum pressure valve according to claim 1, characterized in that the base (7) is screwed with the second conduit (5), the return spring (6) being compressed between the base (7) and the piston chamber, the screw-connection being such that the base (7) can be changed in depth into the second conduit (5), thereby adjusting the compression of the return spring (6).