CN211320006U

CN211320006U - Novel low return difference pressure switch

Info

Publication number: CN211320006U
Application number: CN201922039813.2U
Authority: CN
Inventors: 朱辉辉; 张国平
Original assignee: Zhejiang Yongxin New Energy Technology Co ltd
Current assignee: Zhejiang Yongxin New Energy Technology Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-08-21
Anticipated expiration: 2029-11-20

Abstract

The utility model belongs to the technical field of pressure switches, in particular to a novel low return difference pressure switch, which comprises a shell, wherein a holding cavity is formed in the shell, a main body is arranged in the accommodating cavity, a contact screw is arranged in the main body, a movable push rod is arranged below the contact screw, a contact copper sheet matched with the contact screw is arranged on the end surface of the push rod, an adjusting knob for adjusting the position of the main body is arranged at one end of the shell, a spring is abutted between the adjusting knob and the push rod, the lower end of the adjusting knob is in threaded connection with the main body, the contact copper sheet matched with the contact screw is arranged on the end surface of the push rod through the design of the copper sheet direct contact, when the push rod is pushed by external pressure and moves, the push rod directly contacts the contact screw through the contact copper sheet, the stroke is basically ignored, the pressure difference can be reduced to be within 0.1, and the reaction action is fast.

Description

Novel low return difference pressure switch

Technical Field

The utility model relates to a pressure switch technical field refers in particular to a novel low return difference pressure switch.

Background

A pressure switch for a pump on the market generally comprises an upper shell and a lower shell, wherein the upper shell and the lower shell form an inner space together, a push rod is arranged in the inner space and pushes a travel switch to displace, and the travel switch outputs a signal so as to judge the water pressure state; the travel switch is arranged in the rear cover; the main body and the valve body are connected together; the valve body is connected with the rear cover in a sealing way and clamps the sealing film.

Because the travel switch has travel difference, the pressure difference is about 0.8, and when the quick response is needed, the travel switch cannot work normally.

Disclosure of Invention

The utility model aims at providing a novel low return difference pressure switch through copper sheet direct contact, solves the problem that has the stroke difference.

The purpose of the utility model is realized like this: the utility model provides a novel low return difference pressure switch, includes the shell, and the shaping has the holding cavity in the shell, be provided with the main part in the holding cavity, install the contact screw in the main part, the below of contact screw is provided with mobilizable push rod, the terminal surface of push rod be provided with contact screw complex contact copper sheet, the one end of shell is provided with the adjust knob who is used for adjusting the main part position, and the butt has a spring between adjust knob and the push rod, adjust knob's lower extreme and main part spiro union.

Preferably, a connecting rod is formed at the lower end of the adjusting knob, a linkage adjusting screw is sleeved on the periphery of the connecting rod, and the external thread is formed on the periphery of the linkage adjusting screw.

Preferably, a plurality of buckling parts used for being clamped with the shell are formed on the periphery of the lower end of the adjusting knob, and elastic openings are formed between the buckling parts.

Preferably, the upper end of the push rod is provided with a placing cavity for placing a spring, and the spring abuts between the upper end face of the placing cavity and the lower end face of the main body.

Preferably, the lower end face of the push rod is provided with a gasket, and the lower end face of the gasket is provided with an elastic diaphragm.

Preferably, the push rod is formed at an outer circumference thereof with a guide bar, and the body is formed at an inner circumference thereof with a recessed guide groove.

Preferably, the shell comprises an upper shell body and a lower shell body detachably connected with the upper shell body, a first connecting hole is formed in the upper shell body, a second connecting hole is formed in the lower shell body, and the fastener penetrates through the first connecting hole and the second connecting hole to enable the upper shell body to be connected with the lower shell body.

Preferably, the lower extreme of casing is provided with connecting portion down, and the periphery cover of connecting portion is equipped with waterproof circle, the periphery shaping of connecting portion has connecting thread.

Preferably, the other end of the shell is provided with a water inlet channel communicated with the accommodating cavity.

Preferably, the lower end of the adjusting knob is formed with an external thread, and the upper end of the body is formed with an internal thread.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model discloses a copper sheet direct contact's design specifically is provided with at the terminal surface of push rod with contact screw complex contact copper sheet, receives outside pressure when the push rod and is promoted, during the removal, directly contacts the contact screw through contact copper sheet, ignores the stroke basically, and in the pressure differential can drop to 0.1, the reaction action is fast.

2. The utility model discloses an adjust knob's design, thereby through the position that the main part can be adjusted to the rotation regulation knob, adjust the interval between contact copper sheet and the contact screw to change its sensitivity, the distance between them is more near, and its sensitivity is higher, and distance of two then is more far away from, and its sensitivity is lower.

Drawings

Fig. 1 is a top view of the present invention.

Fig. 2 is a schematic sectional view of the structure at a-a in fig. 1.

Fig. 3 is a schematic diagram of the explosion structure of the present invention.

Reference numerals: 1-a housing; 2-a containing cavity; 3-a body; 4-contact screw; 5-a push rod; 6-contact copper sheet; 7-adjusting knob; 8-a spring; 9-external threads; 10-internal thread; 11-a connecting rod; 12-linkage adjusting screw; 13-a snap-fit portion; 14-a resilient opening; 15-placing the cavity; 16-a gasket; 17-a membrane; 18-a guide bar; 20-an upper shell; 21-a lower shell; 22-a first connection hole; 23-a second connection hole; 24-a connecting portion; 25-waterproof ring; 26-connecting screw threads; 27-water inlet channel.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying fig. 1-3.

A novel low return difference pressure switch.

As shown in fig. 2, the device comprises a housing 1, a water inlet channel 27 communicated with a housing cavity 2 is formed at the lower end of the housing 1, the housing cavity 2 is formed in the housing 1, a main body 3 is arranged in the housing cavity 2, a contact screw 4 is installed in the main body 3, the contact screw 4 is connected with a pump body through a signal line, a movable push rod 5 is arranged below the contact screw 4, a contact copper sheet 6 matched with the contact screw 4 is arranged on the end surface of the push rod 5, when the push rod 5 is pushed by external pressure and moves, the contact screw 4 is directly contacted with the contact screw 4 through the contact copper sheet 6, the stroke is basically ignored, the pressure difference can be reduced to 0.1, the reaction action is fast, an adjusting knob 7 for adjusting the position of the main body 3 is arranged at one end of the housing 1, the lower end of the adjusting knob 7 is in threaded connection with the main body 3, the distance between the contact copper sheet 6 and the contact screw 4 is adjusted, so that the sensitivity of the contact copper sheet is changed, the closer the distance between the contact copper sheet and the contact screw is, the higher the sensitivity of the contact copper sheet is, the farther the distance between the contact copper sheet and the contact screw is, the lower the sensitivity of the contact copper sheet and the contact screw is, and meanwhile, the spring 8 is abutted between the adjusting knob 7 and the push rod 5, when the water pressure is constant, the push rod 5 loses the external pressure, and the spring 8 resets and pushes the push rod 5 back to the original position, so that the.

Combine fig. 2 and fig. 3, the upper end shaping of main part 3 has internal thread 10, the lower extreme shaping of adjust knob 7 has connecting rod 11, and the periphery cover of connecting rod 11 is equipped with linkage adjusting screw 12, and the periphery shaping of linkage adjusting screw 12 has external thread 9 rotates adjust knob 7, and connecting rod 11 will drive linkage adjusting screw 12 and rotate, through the cooperation of external thread 9 and internal thread 10 to make main part 3 remove.

With reference to fig. 2 and 3, a plurality of buckling parts 13 for clamping with the housing 1 are formed on the periphery of the lower end of the adjusting knob 7, an elastic opening 14 is formed between the buckling parts 13, the adjusting knob 7 is inserted into the upper port of the housing 1 through the buckling parts 13, so that the connection between the adjusting knob and the housing is realized, and the plugging and unplugging are easier due to the design of the elastic opening 14.

Specifically referring to fig. 2, the upper end of the push rod 5 is provided with a placing cavity 15 for placing the spring 8, the lower end of the spring 8 is arranged in the placing cavity 15, the upper end of the spring 8 abuts against the lower end face of the inner side of the main body 3, the spring 8 abuts between the upper end face of the placing cavity 15 and the lower end face of the main body 3, through the design of the spring 8, when the water pressure is constant, the push rod 5 loses external pressure, and the spring 8 resets and pushes the push rod 5 back to the original position, so that the automatic reset function is realized.

Specifically, referring to fig. 3, a guide bar 18 is formed on the outer periphery of the push rod 5, a recessed guide groove is formed on the inner periphery of the main body 3, not shown, and the guide bar 18 and the guide groove are designed in a matching manner, so that the push rod 5 can keep vertical movement when being stressed, and the precision is guaranteed.

Specifically, referring to fig. 2, a gasket 16 is arranged on the lower end surface of the push rod 5, and an elastic diaphragm 17 is arranged on the lower end surface of the gasket 16, so that the sensitivity of the push rod to water pressure is increased, and the deformation force can be more accurately converted into the upward displacement of the push rod 5, so that the contact copper sheet 6 touches the contact screw 4.

Specifically, looking at fig. 3, shell 1 includes casing 20 and rather than dismantling the lower casing 21 of being connected, last casing 20 has seted up first connecting hole 22, set up second connecting hole 23 down on casing 21, the fastener passes first connecting hole 22, second connecting hole 23 and makes casing 20 and casing 21 be connected down, in this technical scheme the fastener adopts the screw, through unscrewing the screw, can unpack casing 20 and casing 21 down apart, is convenient for overhaul the part of inside.

Specifically, referring to fig. 2, a connecting portion 24 is provided at the lower end of the lower housing 21, a waterproof ring 25 is sleeved on the outer periphery of the connecting portion 24, a connecting screw 26 is formed on the outer periphery of the connecting portion 24, the pressure switch can be connected with other devices through the connecting screw 26, and the waterproof ring 25 improves the sealing performance of the connection between the two devices.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel low return difference pressure switch, its characterized in that, includes shell (1), and the shaping has holding cavity (2) in shell (1), be provided with main part (3) in holding cavity (2), install contact screw (4) in main part (3), the below of contact screw (4) is provided with mobilizable push rod (5), the terminal surface of push rod (5) be provided with contact screw (4) complex contact copper sheet (6), the one end of shell (1) is provided with adjust knob (7) that are used for adjusting main part (3) position, and the butt has spring (8) between adjust knob (7) and push rod (5), the lower extreme and main part (3) spiro union of adjust knob (7).

2. The novel low return pressure switch of claim 1, wherein: the lower extreme shaping of adjust knob (7) has connecting rod (11), and the periphery cover of connecting rod (11) is equipped with linkage adjusting screw (12), and the periphery shaping of linkage adjusting screw (12) has external screw thread (9).

3. The novel low return pressure switch of claim 1, wherein: a plurality of buckling parts (13) used for being clamped with the shell (1) are formed on the periphery of the lower end of the adjusting knob (7), and elastic openings (14) are formed between the buckling parts (13).

4. The novel low return pressure switch of claim 1, wherein: the upper end of the push rod (5) is provided with a placing cavity (15) for placing the spring (8), and the spring (8) is abutted between the upper end face of the placing cavity (15) and the lower end face of the main body (3).

5. The novel low return pressure switch of claim 4, wherein: the lower end face of the push rod (5) is provided with a gasket (16), and the lower end face of the gasket (16) is provided with an elastic diaphragm (17).

6. The novel low-return-difference pressure switch according to claim 5, characterized in that: the outer periphery of the push rod (5) is formed with a guide strip (18), and the inner periphery of the main body (3) is formed with a sunken guide groove.

7. The novel low return pressure switch of claim 1, wherein: the shell (1) comprises an upper shell body (20) and a lower shell body (21) detachably connected with the upper shell body, a first connecting hole (22) is formed in the upper shell body (20), a second connecting hole (23) is formed in the lower shell body (21), and the fastener penetrates through the first connecting hole (22) and the second connecting hole (23) to enable the upper shell body (20) to be connected with the lower shell body (21).

8. The novel low-return-difference pressure switch according to claim 7, wherein: the lower extreme of lower casing (21) is provided with connecting portion (24), and the periphery cover of connecting portion (24) is equipped with waterproof circle (25), the periphery shaping of connecting portion (24) has connecting thread (26).

9. The novel low return pressure switch of claim 1, wherein: the other end of the shell (1) is provided with a water inlet channel (27) communicated with the accommodating cavity (2).

10. The novel low return pressure switch of claim 1, wherein: the lower end of the adjusting knob (7) is formed with an external thread (9), and the upper end of the main body (3) is formed with an internal thread (10).