CN213685379U

CN213685379U - External pilot-operated two-position three-way electromagnetic valve

Info

Publication number: CN213685379U
Application number: CN202022429531.6U
Authority: CN
Inventors: 陈卫华; 严瑞康; 单晓荣; 单军波; 单谟君
Original assignee: NINGBO JIAERLING PNEUMATIC MACHINERY CO Ltd
Current assignee: NINGBO JIAERLING PNEUMATIC MACHINERY CO Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-07-13
Anticipated expiration: 2030-10-28

Abstract

The utility model discloses a two three solenoid valve of outside guide's formula, which comprises a valve body, the both ends of valve body are equipped with back lid and end cover respectively, be equipped with the valve pocket in the valve body, seted up on the valve body with air inlet, work port and the gas vent of valve pocket intercommunication, it is equipped with the case subassembly to slide in the valve pocket, be equipped with control on the valve body the case subassembly slides to the pilot valve of switching gas circuit direction, the case subassembly include the case, can dismantle respectively connect in the first piston and the second piston at case both ends, an organic whole is equipped with the sealing member on the case, first piston the second piston respectively with the lateral wall sliding seal cooperation of valve pocket. The utility model discloses simple structure is compact, the gas tightness is high, processing is convenient and advantage with low costs has been possessed.

Description

External pilot-operated two-position three-way electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field, in particular to two tee bend solenoid valves of outside guide's formula.

Background

As a mature technology, a solenoid valve is widely used at present, and the solenoid valve is an industrial device controlled by electromagnetism and used for adjusting the direction, flow rate, speed and other parameters of a medium in an industrial control system. The two-position three-way electromagnetic valve is a common electromagnetic valve and mainly comprises a valve body, a valve core and a pilot valve, wherein three connecting ports are formed in the valve body, sealing parts corresponding to the connecting ports are arranged on the valve core, a piston is integrally arranged at the end part of the valve core, and the pilot valve controls a piston cavity for installing the piston to supply air or cut off the air so as to move the valve core, thereby reversing; however, in actual manufacturing, because the diameter of the piston is larger than that of the valve core, when the sealing element and the valve core are separated, the sealing element needs to be spread to be installed on the valve core, but after the sealing element and the valve core are connected in such a way, the gap is large, and the sealing property is extremely poor; when the sealing element and the valve core are manufactured integrally, demolding can be performed symmetrically only along the axis direction perpendicular to the valve core, but a protrusion is left on the sealing element at a joint line, the protrusion is machined and eliminated by adding a process, the sealing element can be tightly matched with the valve body, machining is relatively troublesome, and the sealing element is difficult to be tightly matched with the valve body.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a two tee bend solenoid valves of outside guide's formula, possessed simple structure compactness, gas tightness height, processing convenience and advantage with low costs.

The utility model provides a technical scheme that its technical problem adopted is: an external pilot-operated two-position three-way electromagnetic valve comprises a valve body, wherein a rear cover and an end cover are respectively arranged at two ends of the valve body, a valve cavity is arranged in the valve body, an air inlet, a working port and an air outlet which are communicated with the valve cavity are formed in the valve body, a valve core assembly is arranged in the valve cavity in a sliding mode, a pilot valve for controlling the valve core assembly to slide so as to switch the direction of an air circuit is arranged on the valve body, the valve core assembly comprises a valve core, a first piston and a second piston which are respectively detachably connected to two ends of the valve core, a sealing element is integrally arranged on the valve core, and the first piston and the second piston are respectively matched with.

Furthermore, a first piston cavity is formed between the rear cover and the valve body, the first piston is arranged in the first piston cavity in a sliding and sealing mode, a second piston cavity is formed between the end cover and the valve body, and the second piston is arranged in the second piston cavity in a sliding and sealing mode.

Furthermore, a third piston cavity is arranged in the end cover, a pilot piston is arranged in the third piston cavity in a sliding sealing mode, one end of the pilot piston penetrates through the end cover and is matched with the second piston in an abutting mode, and a first spring is arranged between the other end of the pilot piston and the end cover in an abutting mode.

Furthermore, a pilot port is further formed in the valve body and is communicated with the third piston cavity, the third piston cavity is communicated with the first piston cavity through a pilot channel, and the pilot valve controls the on-off of the pilot channel.

Further, the pilot channel comprises a pilot A channel communicated with the first piston cavity and a pilot B channel communicated with the third piston cavity, and the pilot A channel and the pilot B channel are connected through a valve port; the pilot valve comprises a pilot valve seat and a sleeve, the pilot valve seat is fixed on the valve body, the sleeve is fixed on the pilot valve seat through a pressing plate, a static iron core is fixed at the top end of the sleeve, a movable iron core is arranged at the bottom end of the sleeve in a sliding mode, and a coil is arranged on the outer side of the sleeve; and a second spring is abutted between the pilot valve seat and the movable iron core, the second spring drives the movable iron core to close the valve port, and the coil is electrically connected with a junction box.

Further, the air inlet, the working port, the exhaust port and the pilot port are all arranged on the same side face of the valve body; the installation of the pipeline is convenient, and the valve is convenient to install.

Further, the first piston and the second piston are respectively in threaded connection with two ends of the valve core; the connection is convenient and firm.

Further, the sealing element is in a shape of a string.

The utility model has the advantages that: the valve core assembly is arranged in a split manner, the valve core assembly comprises a valve core, a first piston and a second piston which are respectively detachably connected to two ends of the valve core, a sealing element is integrally arranged on the valve core, and the first piston and the second piston are respectively matched with the side wall of the valve cavity in a sliding sealing manner, so that the pistons and the valve core are arranged in the split manner, the sealing element is convenient to demould along the axis direction of the valve core when being manufactured integrally, the problem that a bulge is left on a demoulding line in the prior art is solved, the sealing performance is improved, the processing is convenient, the processing technology is simplified, and the cost is reduced to a; generally, the utility model discloses simple structure is compact, the gas tightness is high, processing is convenient and advantage with low costs has been possessed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Shown in the figure: 1-a valve body; 1.1-valve cavity; 1.2-gas inlet; 1.3-working port; 1.4-exhaust port; 1.5-a first piston chamber; 1.6-a second piston chamber; 1.7-pilot port; 1.8-pilot channel; 2-rear cover; 3-end cover; 3.1-a third piston chamber; 4-a valve core; 5-a seal; 6-a first piston; 7-a second piston; 8-a pilot piston; 9-a first spring; 10-a pilot valve; 101-pilot valve seat; 101.1-valve port; 102-a sleeve; 103-a platen; 104-a stationary core; 105-a movable iron core; 106-coil; 107-a second spring; 108-a junction box; 11-a seal gasket; 12-O-ring; 13-a flat ring; 14-a wear ring; 15-Y shaped ring.

Detailed Description

For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:

as shown in fig. 1 and fig. 2, an external pilot-operated two-position three-way electromagnetic valve includes a valve body 1, two ends of the valve body 1 are respectively provided with a rear cover 2 and an end cover 3, a valve cavity 1.1 is arranged in the valve body 1, the valve body 1 is provided with an air inlet 1.2 communicated with the valve cavity 1.1, a working port 1.3 and an air outlet 1.4, a valve core assembly is arranged in the valve cavity 1.1 in a sliding manner, the valve body 1 is provided with a pilot valve 10 for controlling the sliding of the valve core assembly, the valve core assembly includes a valve core 4, a first piston 6 and a second piston 7 which are respectively detachably connected to two ends of the valve core 4, the valve core 4 is integrally provided with a sealing member 5, and the first piston 6 and the second piston 7 are respectively matched.

Be formed with first piston chamber 1.5 between back lid 2 and the valve body 1, first piston 6 sliding seal sets up in first piston chamber 1.5, is formed with second piston chamber 1.6 between end cover 3 and the valve body 1, and second piston 7 sliding seal sets up in second piston chamber 1.6.

A third piston cavity 3.1 is arranged in the end cover 3, a pilot piston 8 is arranged in the third piston cavity 3.1 in a sliding sealing mode, one end of the pilot piston 8 penetrates through the end cover 3 and is matched with the second piston 7 in an abutting mode, and a first spring 9 is arranged between the other end of the pilot piston 8 and the end cover 3 in an abutting mode.

Preferably, the first piston 6 is sequentially sleeved with the flat ring 13 and the wear-resistant ring 14, so that the sealing is ensured, and the service life is prolonged, and similarly, the second piston 7 is also sequentially sleeved with the flat ring 13 and the wear-resistant ring 14; the Y-shaped ring 15 is arranged on the pilot piston 8 to ensure the sealing property.

The valve body 1 is further provided with a pilot port 1.7, the pilot port 1.7 is communicated with a third piston cavity 3.1, the third piston cavity 3.1 is communicated with a first piston cavity 1.5 through a pilot channel 1.8, and the pilot valve 10 controls the on-off of the pilot channel 1.8.

The pilot channel 1.8 comprises a pilot channel A communicated with the first piston cavity 1.5 and a pilot channel B communicated with the third piston cavity 3.1, and the pilot channel A and the pilot channel B are connected through a valve port 101.1; the pilot valve 10 comprises a pilot valve seat 101 and a sleeve 102, the pilot valve seat 101 is fixed on the valve body 1, the sleeve 102 is fixed on the pilot valve seat 101 through a pressing plate 103, a static iron core 104 is fixed at the top end of the sleeve 102, a movable iron core 105 is slidably arranged at the bottom end of the sleeve 102, and a coil 106 is arranged outside the sleeve 102; a second spring 107 is arranged between the pilot valve seat 101 and the movable iron core 105 in a supporting manner, the second spring 107 drives the movable iron core 105 to close the valve port 101.1, and the coil 106 is electrically connected with a junction box 108.

The air inlet 1.2, the working port 1.3, the exhaust port 1.4 and the pilot port 1.7 are all arranged on the same side surface of the valve body 1; preferably, a matching O-ring 12 is provided on this side to ensure the tightness of the valve after connection.

The first piston 6 and the second piston 7 are respectively connected to two ends of the valve core 4 in a threaded manner.

Specifically, the sealing member 5 is in a shape of a string; when the sealing element 5 is manufactured, the symmetrical center line of the sealing element 5 is used as a joint line, when the sealing element is demolded, the two dies are demolded along the axis direction of the valve core 4, the sealing element 5 is in a middle shape, then the sealing element 5 is grooved, meanwhile, the bulges at the joint line are machined off together, and finally, a serial shape is formed, so that the sealing element 5 is tightly matched with the valve cavity 1.1.

The utility model discloses a concrete theory of operation as follows: normally, the working port 1.3 is communicated with a pneumatic element, the air inlet 1.2 and the pilot port 1.7 are respectively communicated with an air source, and the air outlet 1.4 is communicated with the atmosphere; under the action of the first spring 9, and gas can flow into the third piston cavity 3.1 from the pilot port 1.7, so that the valve core 4 is positioned at the upper part of the valve cavity 1.1, the gas inlet 1.2 and the working port 1.3 are in a disconnected state, the gas in the pneumatic element flows to the valve cavity 1.1 through the working port 1.3 and then is exhausted to the atmosphere through the gas outlet 1.4, the valve port 101.1 is kept closed under the action of the elastic force of the second spring 107, the pilot channel 1.8 is kept in a disconnected state, and the pilot valve 10 is powered off; after the pilot valve 10 is powered on, the movable iron core 105 is attracted by the static iron core 104 and overcomes the elastic force of the second spring 107, so that the valve port 101.1 is opened, the gas at the pilot port 1.7 sequentially passes through the third piston cavity 3.1, the pilot a channel and the valve port 101.1, and finally flows to the first piston cavity 1.5 through the pilot B channel to push the first piston 6, under the connecting action of the valve core 4, the second piston 7 pushes the pilot piston 8 and overcomes the elastic force of the first spring 9, so that the valve core 4 is reversed, the gas inlet 1.2 is communicated with the working port 1.3, the gas in the gas inlet 1.2 flows to the working port 1.3 through the valve cavity 1.1, and the connected pneumatic element works.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. The utility model provides an outside guide's two tee bend solenoid valves of formula, includes valve body (1), the both ends of valve body (1) are equipped with back lid (2) and end cover (3) respectively, be equipped with valve pocket (1.1) in valve body (1), set up on valve body (1) with air inlet (1.2) of valve pocket (1.1) intercommunication, work mouthful (1.3) and gas vent (1.4), it is equipped with the case subassembly to slide in valve pocket (1.1), be equipped with on valve body (1) and control the case subassembly slides to switch pilot valve (10) of gas circuit direction, its characterized in that: the valve core assembly comprises a valve core (4), a first piston (6) and a second piston (7) which are respectively detachably connected to two ends of the valve core (4), a sealing piece (5) is integrally arranged on the valve core (4), and the first piston (6) and the second piston (7) are respectively in sliding sealing fit with the side wall of the valve cavity (1.1).

2. The external pilot two-position three-way solenoid valve according to claim 1, characterized in that: back lid (2) with be formed with first piston chamber (1.5) between valve body (1), first piston (6) sliding seal set up in first piston chamber (1.5), end cover (3) with be formed with second piston chamber (1.6) between valve body (1), second piston (7) sliding seal set up in second piston chamber (1.6).

3. An external piloted two-position three-way solenoid valve as in claim 2, wherein: be equipped with third piston chamber (3.1) in end cover (3), sliding seal is equipped with guide's piston (8) in third piston chamber (3.1), the one end of guide's piston (8) is passed end cover (3) and with second piston (7) counterbalance cooperation, the other end of guide's piston (8) with it is equipped with first spring (9) to support between end cover (3).

4. An external piloted two-position three-way solenoid valve as in claim 3, wherein: the valve body (1) is further provided with a pilot port (1.7), the pilot port (1.7) is communicated with the third piston cavity (3.1), the third piston cavity (3.1) is communicated with the first piston cavity (1.5) through a pilot channel (1.8), and the pilot valve (10) controls the on-off of the pilot channel (1.8).

5. An external piloted two-position three-way solenoid valve as in claim 4, wherein: the pilot channel (1.8) comprises a pilot A channel communicated with the first piston cavity (1.5) and a pilot B channel communicated with the third piston cavity (3.1), and the pilot A channel and the pilot B channel are connected through a valve port (101.1); the pilot valve (10) comprises a pilot valve seat (101) and a sleeve (102), the pilot valve seat (101) is fixed on the valve body (1), the sleeve (102) is fixed on the pilot valve seat (101) through a pressing plate (103), a static iron core (104) is fixed at the top end of the sleeve (102), a movable iron core (105) is arranged at the bottom end of the sleeve (102) in a sliding mode, and a coil (106) is arranged on the outer side of the sleeve (102); a second spring (107) is arranged between the pilot valve seat (101) and the movable iron core (105) in a propping manner, the second spring (107) drives the movable iron core (105) to close the valve port (101.1), and the coil (106) is electrically connected with a junction box (108).

6. An external piloted two-position three-way solenoid valve as in claim 5, wherein: the air inlet (1.2), the working opening (1.3), the exhaust opening (1.4) and the pilot opening (1.7) are all arranged on the same side face of the valve body (1).

7. An external piloted two-position three-way solenoid valve as in any of claims 1 to 6, characterized in that: the first piston (6) and the second piston (7) are respectively in threaded connection with two ends of the valve core (4).

8. The external pilot two-position three-way solenoid valve according to claim 7, wherein: the sealing element (5) is in a shape of a string.