CN211144957U

CN211144957U - Pilot valve

Info

Publication number: CN211144957U
Application number: CN201922372728.8U
Authority: CN
Inventors: 杨济铭; 何贤剑; 高振家
Original assignee: Zhejiang Haihong Hydraulic Technology Co ltd
Current assignee: Zhejiang Haihong Hydraulic Technology Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-07-31
Anticipated expiration: 2029-12-25

Abstract

The utility model provides a pilot valve belongs to hydraulic pressure technical field. The pilot valve solves the problems that an existing pilot valve is not easy to install in a positioning structure and poor in reliability. This pilot valve, including valve body, relief pressure valve device and operating handle, operating handle is articulated with the valve body, and the outer wall of valve body has curved spigot surface, spaced apart on the spigot surface has a plurality of locating holes, the last location structure that is located outside the valve body that is equipped with of operating handle, location structure includes the locating piece that links firmly with operating handle, it has the mounting hole to open on the locating piece, and the mounting hole is the through-hole, be equipped with in the mounting hole and support with the spigot surface and lean on and can imbed the ball in the mounting hole and be used for pushing up the positioning spring who pushes away the ball, the one end threaded connection that the ball was kept away from to the mounting hole has the. The pilot valve is positioned by matching the ball pushed by the positioning spring with the guide surface on the valve body, and has the advantages of simple structure, convenient installation and stable and reliable positioning.

Description

Pilot valve

Technical Field

The utility model belongs to the technical field of hydraulic pressure, a pilot valve is related to.

Background

The pilot valve is a control mechanism for controlling other valves or elements, and is mainly used in engineering machinery such as loaders, cranes, excavators, bulldozers, and the like. In the operation process of the pilot valve, an operating lever or a handle of the pilot valve often needs to be shifted to a certain gear for a long time, so that the equipment can continuously perform a certain action, and at the moment, the handle needs to be stably and reliably positioned.

For example, the Chinese patent application (application number: 201410329808.4) discloses a manual decompression type pilot valve, which comprises a valve body, wherein the valve body is provided with a decompression type proportional pilot control valve comprising a compression bar, a spring seat, a reset spring, a pressure regulating spring and a valve core, and a handle operating mechanism comprising a handle and a universal joint, an electromagnet sleeved outside the compression bar is arranged in the valve body, the top of the compression bar is provided with an electromagnet sucker, and the handle is positioned by adsorbing the electromagnet sucker. Chinese patent application No. 201120479520.7 also discloses a similar structure using electromagnets for positioning. However, the structure of the electromagnet is complex, the occupied space is large, the circuit needs to be connected, the installation is time-consuming and labor-consuming, the heating problem of the electromagnet in the using process is caused, the overheating failure problem is caused, and the locking failure of the electromagnet caused by circuit faults exists, so that certain potential safety hazards exist.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a pilot valve, the utility model aims to solve the technical problem that: how to make the location structure installation of pilot valve more convenient and the reliability better.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a pilot valve, includes the valve body, sets up the relief pressure valve device in the valve body and is used for controlling relief pressure valve device's operating handle, operating handle is articulated with the valve body, a serial communication port, the outer wall of valve body has curved spigot surface, spaced apart on the spigot surface has a plurality of locating holes, the last location structure that is located outside the valve body that is equipped with of operating handle, location structure includes the locating piece that links firmly with operating handle, it has one end towards the mounting hole of spigot surface to open on the locating piece, the mounting hole is the through-hole, be equipped with in the mounting hole and support with the spigot surface and lean on and can imbed the ball in the mounting hole and be used for the positioning spring that the ball pushed up and push away, the one end threaded connection that the ball.

The operating handle of the pilot valve is hinged with the valve body, the pressure reducing valve device in the valve body is controlled by swinging the operating handle, in order to realize the positioning of the operating handle, the utility model discloses set up the positioning structure on the control handle, and set up the spigot surface with the locating hole on the valve body, when swinging the operating handle, the ball in the positioning structure is supported and leaned against and can roll along the spigot surface, when the operating handle moves in place, the ball can imbed in the locating hole to realize the positioning of the operating handle, simple and reliable, moreover, the mounting hole that sets up the positioning spring and the ball in the present case adopts the through-hole structure, thus, firstly, the ball and the positioning spring are put into the mounting hole in advance during the installation, then the adjusting stud is connected with the mounting hole thread, make the positioning spring in the compression state, can make the ball and the spigot surface keep stable and reliable cooperation, the positioning spring, and the pretightening force of the positioning spring can be conveniently adjusted after the positioning spring is installed, and the installation operation is simple and convenient.

In the above pilot valve, the center of the arc where the guide surface is located is a hinge point between the operating handle and the valve body. Therefore, when the operating handle is operated in a swinging mode, the ball rolls along the guide surface more smoothly.

In the above pilot valve, the number of the guide surfaces is two, the two guide surfaces are respectively located at two sides of the operating handle, the number of the positioning structures is also two, and the two positioning structures respectively correspond to the two guide surfaces one to one. Therefore, the stress is more balanced and the positioning effect is more stable and reliable when the operating handle is locked.

In the above pilot valve, the diameter of the opening of the mounting hole facing one end of the guide surface is smaller than the diameter of the ball, and the diameter of the opening of the other end of the mounting hole is larger than the diameter of the ball, so that the ball is prevented from being disengaged from the end with the smaller diameter of the mounting hole.

In foretell pilot valve, operating handle's one end has linked firmly the hinge joint, the hinge joint is articulated with the valve body, the compression leg has been set firmly respectively to articulated both sides, oil feed runner, oil return runner and two valve openings have in the valve body, two valve openings all with oil feed runner and oil return runner intercommunication, the valve opening just is located the compression leg below that corresponds respectively with the compression leg one-to-one, and two relief pressure valve device install respectively in two valve openings. When the operating handle swings, the two pressure columns can be pressed down or lifted, so that the two pressure reducing valve devices are controlled.

In the pilot valve, the operating handle is further sleeved with a dustproof sleeve, one end of the dustproof sleeve is fixedly connected with the valve body, and the positioning structure is located in the dustproof sleeve.

Compared with the prior art, the utility model has the advantages of it is following:

1. The utility model discloses a set up the spigot surface on the valve body and set up the location structure cooperation on operating handle, make operating handle remove the back that targets in place, during the locating hole on the spigot surface can be imbedded to the ball among the location structure, realize operating handle's location, simple structure is reliable. And the mounting hole for mounting the ball adopts a through hole structure, so that the positioning spring can be firstly mounted in the mounting hole together with the ball without pre-compression, and then the pre-tightening force of the positioning spring is adjusted by adjusting the stud, and the mounting is simple and convenient.

2. The guide surface and the positioning structure are two and are respectively positioned on two sides of the operating handle, so that the stress of the operating handle is more balanced, and the positioning effect is better.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a positioning structure;

3 FIG. 3 3 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 2 3; 3

Fig. 4 is a hydraulic schematic diagram of the present invention.

In the figure, 1, a valve body; 11. a guide surface; 12. positioning holes, 13 and oil inlet flow passages; 14. an oil return flow passage; 15. a valve bore; 15a, a first working port; 15b, a second working port; 2. an operating handle; 3. a positioning structure; 31. positioning blocks; 32. mounting holes; 33. a ball bearing; 34. a positioning spring; 35. adjusting the stud; 4. a pressure reducing valve device; 41. a pressure lever, 42, a valve core; 43. a first spring; 44. a second spring; 45. a spring seat; 5. hinging; 6. hinging a shaft; 7. pressing the column; 8. a dust-proof cover.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, a pilot valve comprises a valve body 1, two pressure reducing valve devices 4 arranged in the valve body 1, and an operating handle 2 for controlling the two pressure reducing valve devices 4, wherein the outer wall of the valve body 1 is provided with an arc-shaped guide surface 11, three positioning holes 12 are spaced on the guide surface 11, the operating handle 2 is hinged with the valve body 1, the operating handle 2 is provided with a positioning structure 3 matched with the guide surface 11 and the positioning holes 12, the positioning structure 3 is positioned at the outer side of the valve body 1, the positioning structure 3 comprises a positioning block 31, a ball 33, a positioning spring 34 and an adjusting stud 35, wherein, the locating piece 31 is fixedly connected with the operating handle 2, the locating piece 31 is provided with a mounting hole 32 with one end facing the guide surface 11, the mounting hole 32 is a through hole, a ball 33 and a locating spring 34 are arranged in the mounting hole 32, the ball 33 is in abutting contact with the guide surface 11, and one end of the mounting hole 32 far away from the ball 33 is in threaded connection with an adjusting stud 35. Like this, when swing operating handle 2, ball 33 on the locating piece 31 can imbed in the corresponding mounting hole 32, realizes operating handle 2's location, makes ball 33 and positioning spring 34 can pack into mounting hole 32 earlier in addition after, threaded connection adjusting stud 35 again, makes positioning spring 34 be in compression state, makes the installation of location structure 3 more convenient and fast.

Specifically, as shown in fig. 2 and 3, in this embodiment, the mounting hole 32 extends along the length direction of the operating handle 2, the ball 33, the positioning spring 34 and the adjusting stud 35 are sequentially arranged along the axial direction of the mounting hole 32 from the end of the mounting hole 32 close to the guide surface 11 to the end far from the guide surface 11, the caliber of the opening of the mounting hole 32 close to the end of the guide surface 11 is slightly smaller than the diameter of the ball 33, and the caliber of the opening of the mounting hole 32 far from the end of the guide surface 11 is slightly larger than the diameter of the ball 33, so that the ball 33 and the positioning spring 34 can be loaded from the end of the mounting hole 32 with the larger caliber and then pre-tightened by the adjusting stud 35.

In this embodiment, the guiding surface 11 is arc-shaped, and the center of the circle where the guiding surface 11 is located is the hinge point between the operating handle 2 and the valve body 1, so that the ball 33 can roll more smoothly on the guiding surface 11 along with the operating handle 2. The guide surfaces 11 are two, the two guide surfaces 11 are respectively located on two sides of the operating handle 2, the two positioning structures 3 arranged on the operating handle 2 are also two, and the two positioning structures 3 are respectively located on two sides of the operating handle 2 and are in one-to-one correspondence with the guide surfaces 11, so that the positioning stability of the positioning structures 3 on the operating handle 2 is better.

As shown in fig. 1 to 4, one end of the operating handle 2 extending into the valve body 1 is fixedly connected with a hinge joint 5, the hinge joint 5 is hinged with the valve body 1 through a hinge shaft 6, two sides of the hinge joint 5 are fixedly connected with compression columns 7, the valve body 1 is internally provided with an oil inlet flow passage 13, an oil return flow passage 14 and two valve holes 15, the oil inlet flow passage 13 is provided with an oil inlet P, the oil return flow passage 14 is provided with an oil return port T, the two valve holes 15 are respectively positioned below the two compression columns 7, the two valve holes 15 are both communicated with the oil inlet flow passage 13 and the oil return flow passage 14, openings at the bottoms of the two valve holes 15 are respectively a first working port 15a and a second working port 15b, the two pressure reducing valve devices 4 are respectively arranged in the two valve holes 15, each pressure reducing valve device 4 comprises a valve core 42, a pressure rod 41, a first spring 43, a second spring 44 and a spring seat 45, the pressure rod 41, the first spring 43 and the second spring 44 are both sleeved on the valve core 42, the diameter of the first spring 43 is larger than that of the second spring 44, two ends of the first spring 43 are respectively abutted against the spring seat 45 and the valve body 1, two ends of the second spring 44 are respectively abutted against the spring seat 45 and the valve core 42, so that the first spring 43 provides elastic force required by the reset of the pressure rod 41, and the second spring 44 provides pressure required by the pressure reduction of oil. When the oil pressure reducing valve is used, the operating handle 2 is swung to enable the pressure column 7 to apply pressure to the pressure rod 41, so that the valve core 42 is driven to move downwards, oil in the oil inlet flow passage 13 flows out of the first working port 15a or the second working port 15b through the valve core 42, and pressure reduction is formed when the oil flows through the valve core 42.

Further, in this embodiment, still the cover is equipped with dirt proof boot 8 on making the handle, and dirt proof boot 8 adopts flexible material such as rubber to make, and the one end and the valve body 1 of dirt proof boot 8 link firmly, and location structure 3 is arranged in dirt proof boot 8, avoids during dust impurity gets into location structure 3 to further guarantee location structure 3's operational reliability.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms valve body 1, operating handle 2, pressure reducing valve means 4, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A pilot valve comprises a valve body (1), a pressure reducing valve device (4) arranged in the valve body (1) and an operating handle (2) used for controlling the pressure reducing valve device (4), wherein the operating handle (2) is hinged to the valve body (1), the pilot valve is characterized in that the outer wall of the valve body (1) is provided with an arc-shaped guide surface (11), a plurality of positioning holes (12) are formed in the guide surface (11) at intervals, a positioning structure (3) located outside the valve body (1) is arranged on the operating handle (2), the positioning structure (3) comprises a positioning block (31) fixedly connected with the operating handle (2), a mounting hole (32) with one end facing the guide surface (11) is formed in the positioning block (31), the mounting hole (32) is a through hole, a ball (33) which abuts against the guide surface (11) and can be embedded into the mounting hole (32) and a positioning spring (34) used for pushing the ball (33) are arranged in the mounting hole (32), and one end of the mounting hole (32) far away from the ball (33) is in threaded connection with an adjusting stud (35) abutted against a positioning spring (34).

2. A pilot valve according to claim 1, characterised in that the centre of the arc in which the guide surface (11) is located is the point of articulation of the operating handle (2) with the valve body (1).

3. A pilot valve as claimed in claim 2, wherein there are two guide surfaces (11), two guide surfaces (11) are located on each side of the operating handle (2), and there are two positioning structures (3), and two positioning structures (3) are located on each guide surface (11).

4. A pilot valve as claimed in claim 2 or 3, wherein the bore of the opening of the mounting hole (32) towards one end of the guide surface (11) is smaller than the diameter of the ball (33), and the bore of the opening of the mounting hole (32) at the other end is larger than the diameter of the ball (33).

5. The pilot valve of claim 4, characterized in that, the one end of operating handle (2) has linked firmly hinge (5), hinge (5) are articulated with valve body (1), the compression leg (7) has set firmly respectively to articulated both sides, have into oil flow way (13), return oil flow way (14) and two valve opening (15) in valve body (1), two valve opening (15) all communicate with oil feed flow way (13) and return oil flow way (14), valve opening (15) and compression leg (7) one-to-one just are located corresponding compression leg (7) below respectively, and two relief valve device (4) are installed respectively in two valve openings (15).

6. A pilot valve as claimed in claim 5, wherein a dust-proof sleeve (8) is further sleeved on the operating handle (2), one end of the dust-proof sleeve (8) is fixedly connected with the valve body (1), and the positioning structure (3) is located in the dust-proof sleeve (8).