CN219119888U

CN219119888U - Minimum pressure valve

Info

Publication number: CN219119888U
Application number: CN202223020122.6U
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: 2022-11-12
Filing date: 2022-11-12
Publication date: 2023-06-02
Anticipated expiration: 2032-11-12

Abstract

The utility model provides a minimum pressure valve, including lower valve body (1) and last valve body (2), go up valve body (2) and install on lower valve body (1), but the cooperation is cup jointed in the upper portion of pressurize case (6) and upper valve body (2) upper and lower slip, be equipped with pressurize spring (7) in pressurize case (6), upper end trompil setting of last valve body (2), threaded connection has spring holder (8) in this trompil, spring holder (8) are located pressurize spring (7) one side and are equipped with spring socket (9), the upper end and the spring socket (9) of pressurize spring (7) cup joint, the lower extreme and the pressurize case (6) of pressurize spring (7) are connected, the top of spring holder (8) is equipped with indent regulation hole (10), regulation hole (10) are used for connecting the rotation tool in order to rotate spring holder (8), thereby the degree of regulation spring holder (8) compression pressurize spring (7); the foregoing solution is advantageous for reducing the height of the minimum pressure valve and, in addition, for a minimum pressure valve top surface leveling design.

Description

Minimum pressure valve

Technical Field

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

Background

The current minimum pressure valve for an air compressor provides a pressure-adjustable structure, but the current pressure-adjustable structure usually comprises a pressure-maintaining spring (6), a spring gasket (7) and an adjusting bolt (8), the height of the pressure-adjustable structure is increased, the top surface of the minimum pressure valve is obvious and cannot be leveled, for example, a minimum pressure valve of an oil injection screw air compressor disclosed by CN211623718U is disclosed, the upper end of the pressure-maintaining spring (6) is fixed on a cylinder body (2) through the spring gasket (7) and the adjusting bolt (8), a balance hole (10) is arranged on the cylinder body (2), the cylinder body (2) is arranged on the valve body (1), an air flow channel (1-1) is arranged in the valve body (1), an inlet (1-2) and an outlet (1-3) are arranged at two ends of the air flow channel (1-1), a check valve core (3) is arranged in the air flow channel, a pressure-maintaining valve core (4) is arranged on the check valve core (3), a balance hole (10) is arranged between the pressure-maintaining spring (2) and the pressure-maintaining spring (4) and the check valve core (4) is arranged in the valve core (1), the pretightening force of the pressure maintaining spring (6) is adjusted through adjusting the adjusting bolt (8).

As can be seen from the above, such pressure-adjustable structures increase the height of the minimum pressure valve, and in addition, the top surface of the minimum pressure valve is raised significantly, and cannot be designed to be leveled, which means that the top surface of the minimum pressure valve is made relatively flat.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides the minimum pressure valve which is beneficial to reducing the height of the minimum pressure valve and is beneficial to the design of the top surface leveling of the minimum pressure valve.

Compared with the prior art, the utility model provides a minimum pressure valve, which comprises a lower valve body and an upper valve body, wherein the upper valve body is arranged on the lower valve body, an airflow channel is arranged in the lower valve body, an inlet and an outlet are arranged at two ends of the airflow channel, a check valve core is arranged in the airflow channel, the check valve core is connected with a pressure maintaining valve core, the upper part of the pressure maintaining valve core and the upper valve body can be matched with each other in a sliding sleeving manner up and down, a pressure maintaining spring is arranged in the pressure maintaining valve core, an opening is formed in the upper end of the upper valve body, a spring seat is connected in a threaded manner in the opening, a spring sleeving part is arranged on one side of the spring seat, the upper end of the pressure maintaining spring is sleeved with the spring sleeving part, the lower end of the pressure maintaining spring is connected with the pressure maintaining valve core, an inwards concave adjusting hole is formed in the top of the spring seat and is used for connecting a rotating tool to rotate the spring seat, so as to adjust the degree of the spring seat to compress the pressure maintaining spring.

As an improvement, the opening is provided with a connecting pipe part which is arranged in a downward extending way and is in threaded connection with the spring seat.

As an improvement, the diameter of the connecting pipe portion is smaller than the diameter of the upper portion of the pressure maintaining valve core.

As an improvement, the upper part of the pressure maintaining valve core is provided with a sleeve joint hole, the diameter of the sleeve joint hole is larger than that of the connecting pipe part, and when the upper part of the pressure maintaining valve core moves upwards, the sleeve joint hole is in sleeve joint fit with the connecting pipe part.

As an improvement, the upper end of the sleeve joint hole is provided with an annular conical surface which expands outwards, after the sleeve joint hole is in sleeve joint fit with the connecting pipe part, a ventilation interval is formed between the connecting pipe part and the sleeve joint hole, the ventilation interval comprises an expansion part which is formed between the annular conical surface and the connecting pipe part at intervals, and the expansion part is communicated with a balance hole arranged on the upper valve body.

As an improvement, an annular part is arranged between the peripheral wall of the upper valve body and the spring seat, and the annular part is provided with a balance hole.

As an improvement, the axial direction of the balance hole is set along the moving direction of the pressure maintaining valve spool.

After adopting the structure, compared with the prior art, the utility model has the following advantages: the utility model provides a minimum pressure valve, which is arranged through an opening at the upper end of an upper valve body, a spring seat is connected in the opening in a threaded manner, a spring sleeving part is arranged on one side of a pressure maintaining spring, the upper end of the pressure maintaining spring is sleeved with the spring sleeving part, the lower end of the pressure maintaining spring is connected with a pressure maintaining valve core, and the top of the spring seat is provided with an inwards concave adjusting hole which is used for connecting a rotating tool to rotate the spring seat, so that the degree of compressing the pressure maintaining spring by the spring seat is adjusted, and the original structures such as a spring gasket and an adjusting bolt are omitted, so that the height of the minimum pressure valve is reduced, and in addition, the design of leveling the top surface of the minimum pressure valve is facilitated.

Drawings

Fig. 1 is a perspective view of a minimum pressure valve.

Fig. 2 is a top view of a minimum pressure valve.

Fig. 3 is a cross-sectional view of a minimum pressure valve.

The reference numerals indicate that the valve body comprises a 1-lower valve body, a 2-upper valve body, a 3-inlet, a 4-outlet, a 5-check valve core, a 6-pressure maintaining valve core, a 7-pressure maintaining spring, an 8-spring seat, a 9-spring sleeving part, a 10-adjusting hole, a 11-connecting pipe part, a 12-sleeving hole, a 13-annular conical surface, a 14-balance hole and a 15-annular part.

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 minimum pressure valve comprises a lower valve body 1 and an upper valve body 2, wherein the upper valve body 2 is installed on the lower valve body 1, an air flow channel is arranged in the lower valve body 1, an inlet 3 and an outlet 4 are arranged at two ends of the air flow channel, a check valve core 5 is arranged in the air flow channel, a pressure maintaining valve core 6 is connected to the check valve core 5, the upper part of the pressure maintaining valve core 6 and the upper valve body 2 can be matched in a sliding sleeving manner up and down, a pressure maintaining spring 7 is arranged in the pressure maintaining valve core 6, an opening is formed in the upper end of the upper valve body 2, a spring seat 8 is connected in the opening in a threaded manner, a spring sleeving part 9 is arranged on one side of the spring seat 8, the upper end of the pressure maintaining spring 7 is sleeved with the spring sleeving part 9, the lower end of the pressure maintaining spring 7 is connected with the pressure maintaining valve core 6, an inwards concave adjusting hole 10 is arranged at the top of the spring seat 8, and the adjusting hole 10 is used for connecting a rotating tool to rotate the spring seat 8, so that the spring seat 8 compresses the pressure maintaining spring 7.

As shown in fig. 1 and 3, the upper valve body 2 and the lower valve body 1 are connected by a flange.

In this example, the adjusting hole 10 is an inner hexagonal hole, so as to adapt to the outer hexagonal wrench for adjustment, and by rotating the spring seat 8, the spring seat 8 can be raised/lowered, and then the compression degree of the pressure maintaining spring 7 can be changed.

In some embodiments, as shown in fig. 3, the hole is provided with a connecting pipe portion 11 extending downward, and the connecting pipe portion 11 is in threaded connection with the spring seat 8, so that after the design, the connecting pipe portion 11 has an assistance to the stability of the up-and-down movement of the spring seat 8, and meanwhile, the fixing of the spring seat 8 is more reliable, and in daily use, the spring seat 8 is not easy to rotate.

In some embodiments, as shown in fig. 3, the diameter of the connection pipe portion 11 is smaller than the diameter of the upper portion of the pressure maintaining valve core 6, so that the upper portion of the pressure maintaining valve core 6 does not interfere with the lower end of the connection pipe portion 11 when moving upward.

In some embodiments, as shown in fig. 3, a socket hole 12 is provided at the upper part of the pressure maintaining valve core 6, the diameter of the socket hole 12 is larger than that of the connection pipe part 11, and when the upper part of the pressure maintaining valve core 6 moves upwards, the socket hole 12 is in socket fit with the connection pipe part 11. After such design, on the one hand, the pressure maintaining valve core 6 has a larger stroke, and on the other hand, the spring seat 8 has a downward larger adjusting stroke, so that a larger pretightening force can be provided.

In some embodiments, as shown in fig. 3, the upper end of the socket hole 12 is provided with an annular tapered surface 13 that expands in an outward direction, and after the socket hole 12 is in socket engagement with the connection pipe portion 11, a ventilation space is formed between the connection pipe portion 11 and the socket hole 12, and the ventilation space includes an enlarged portion formed by the annular tapered surface 13 and the space between the connection pipe portion 11, and the enlarged portion communicates with a balance hole 14 provided in the upper valve body 2. After the design, the internal and external ventilation balance is facilitated, so that the response speed of the movement of the pressure maintaining valve core 6 is guaranteed.

In some embodiments, as shown in fig. 3, an annular portion 15 is provided between the peripheral wall of the upper valve body 2 and the spring seat 8, the annular portion 15 being provided with a balance hole 14.

In some embodiments, as shown in fig. 3, in order to make ventilation smoother and faster, the axial direction of the balance hole 14 is set along the movement direction of the pressure maintaining spool 6.

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 minimum pressure valve, includes lower valve body (1) and last valve body (2), go up valve body (2) install in on lower valve body (1), be equipped with air current passageway in lower valve body (1), air current passageway's both ends are equipped with entry (3) and export (4), be equipped with check case (5) in the air current passageway, be connected with pressurize case (6) on check case (5), the cooperation of can sliding from top to bottom in pressurize case (6) upper portion and last valve body (2), be equipped with pressurize spring (7) in pressurize case (6), a serial communication port, go up valve body (2) upper end trompil setting, threaded connection has spring holder (8) in this trompil, spring holder (8) are located pressurize spring (7) one side and are equipped with spring socket (9), and the upper end and spring socket (9) of pressurize spring (7) cup joint, and the lower extreme and the pressurize case (6) of pressurize spring (7) are connected, and the top of spring holder (8) is equipped with indent regulation hole (10), and regulation hole (10) are used for connecting rotation instrument in order to rotate (8) to adjust the spring holder (8) degree of compression of spring holder (7).

2. A minimum pressure valve according to claim 1, characterized in that the opening is provided with a connecting tube portion (11) extending downwards, which connecting tube portion (11) is in threaded connection with the spring seat (8).

3. The minimum pressure valve according to claim 2, characterized in that the diameter of the connecting pipe portion (11) is smaller than the diameter of the upper portion of the pressure maintaining spool (6).

4. A minimum pressure valve according to claim 3, characterized in that the upper part of the pressure maintaining valve core (6) is provided with a sleeve joint hole (12), the diameter of the sleeve joint hole (12) is larger than that of the connecting pipe part (11), and the sleeve joint hole (12) is in sleeve joint fit with the connecting pipe part (11) when the upper part of the pressure maintaining valve core (6) moves upwards.

5. The minimum pressure valve according to claim 4, wherein the upper end of the socket hole (12) is provided with an annular tapered surface (13) which expands in an outward direction, and a ventilation space is formed between the connecting pipe portion (11) and the socket hole (12) after the socket hole (12) is socket-fitted with the connecting pipe portion (11), the ventilation space including an expanded portion formed at a space between the annular tapered surface (13) and the connecting pipe portion (11), the expanded portion being communicated with a balance hole (14) provided in the upper valve body (2).

6. A minimum pressure valve according to claim 1 or 5, characterized in that an annular part (15) is provided between the peripheral wall of the upper valve body (2) and the spring seat (8), which annular part (15) is provided with a balancing hole (14).

7. The minimum pressure valve according to claim 6, characterized in that the axial direction of the balancing hole (14) is arranged in the direction of movement of the pressure-maintaining valve spool (6).