WO2022127577A1

WO2022127577A1 - Z-shaped liquid control valve without diaphragm, shaft, bushing, or spring

Info

Publication number: WO2022127577A1
Application number: PCT/CN2021/134204
Authority: WO
Inventors: 张磊
Original assignee: 张磊
Priority date: 2020-12-16
Filing date: 2021-11-30
Publication date: 2022-06-23
Also published as: IL303516A; CN115247709A

Abstract

A Z-shaped liquid control valve without a diaphragm, a shaft, a bushing, or a spring, comprising a cover (1), a body (3), sealing ring grooves (4), sealing rings (5), a piston (6), an extension end surface (13) below the piston, and an inner cavity stop port (14) at an output end of the body. The sealing ring grooves (4) are provided on the cover (1), provided on the body (3), provided on both the cover (1) and the body (3), provided on a seat (2) between the cover (1) and the body (3), provided on both the cover (1) and the seat (2), provided on both the seat (2) and the body (3), or provided on all the cover (1), the seat (2), and the body (3). The sealing rings (5) are mounted in the sealing ring grooves (4), the piston (6) is provided in the sealing rings (5), the cover (1) and the body (3), or the cover (1), the seat (2), and the body (3) are sealed to form a whole, and the piston (6) and the extension end surface (13) below the piston form a whole. The control valve has a simple structure and a small head loss.

Description

A Z-type liquid control valve without diaphragm shaft sleeve spring

technical field

The invention relates to a Z-type liquid control valve without a diaphragm shaft bushing spring, in particular a liquid control valve that can meet the requirements of various liquid flow conditions can be formed through different processing structures and assembly forms of sealing rings.

Background technique

Existing liquid control valves need to use diaphragms, shafts, bushings and springs. The flow direction of the liquid can only be controlled in one direction during operation, and the static liquid flow cannot be set when the working conditions require it.

The existing liquid control valve is to install a diaphragm to push the shut-off plate connected to the shaft to close and open the valve. Once the diaphragm is damaged, it is very difficult to replace it, and professional technicians are required to replace it, especially for large-diameter valves. It is even more difficult, and the manufacturing and processing costs of the diaphragm of the large-diameter liquid control valve are quite high.

Existing liquid control valves need to install shafts and sleeves to navigate and push the shut-off pressure plate connected to the shafts to effectively close and open the valve. Because of the need for shafts and sleeves, scaling is easy to occur in many liquids. , it is easy to cause the valve to close or fail to open.

The existing liquid control valve can only control the flow direction of the liquid in one direction during operation, so the scope of use has many limitations.

In addition, the existing liquid control valve needs to use a spring to reset and increase the stability of the valve when closing. , so it can only be used in specific conditions.

SUMMARY OF THE INVENTION

The liquid control valve of the present invention overcomes the technical deficiencies of the current liquid control valve, and through different structural processing and assembly types, does not need to use a diaphragm, a shaft rod, a shaft sleeve, and a spring, forming a brand-new type of fluid flow equipment that can meet the needs of various liquids. Diaphragmless Shaft Sleeve Spring Z-Type Liquid Control Valves for any condition. When required by working conditions, the liquid flow direction can pass through the liquid control valve in one direction or two directions, and the liquid control valve can be closed in one direction or two directions; when required by working conditions, the liquid control valve can set the static liquid flow rate.

The above technical problem is achieved by the Z-type liquid control valve without a diaphragm shaft sleeve spring according to claim 1 .

Dependent claims 2-18 of the invention present further refinements.

The cross section mentioned in the present invention refers to the section perpendicular to the groove of the sealing ring or the center line of the sealing ring, the longitudinal section is the section passing through the center line, and other components are similar.

Using the liquid control valve of the present invention, the processing structure and assembly method of the liquid control valve can make the diaphragm of the liquid control valve replaced by the sealing ring, and the navigation of the shaft and the shaft sleeve is not required, so the assembly becomes convenient; after the liquid control valve is installed and used , If the sealing ring and piston are damaged, due to its unique manufacturing and assembly method, the maintenance is extremely convenient, and professional technicians do not need to be replaced, so the service life of the liquid control valve can be basically the same as that of the pipeline.

The liquid control valve of the present invention reduces the failure rate of the liquid control valve due to its unique design, and increases and expands the use range of the liquid control valve.

In terms of manufacturing, because the liquid control valve of the present invention has no diaphragm, shaft and sleeve, the manufacturing becomes simple and the cost is reduced; especially, the equipment grade required for the manufacture of the large-mouth liquid control valve can be greatly improved. lowering, so it is possible to manufacture an oversized liquid control valve.

Using the liquid control valve of the present invention, its structure and its assembling method can make the liquid control valve can be assembled on site as a single component, especially in the transportation and installation of large valves, the transportation and installation costs can be greatly reduced.

Using the Z-type liquid control valve without diaphragm shaft sleeve spring according to the present invention, its structure can make the liquid control valve not need to install diaphragm, shaft and shaft sleeve, spring; Or two-way closing valve; it can dynamically and statically control the liquid flow and pressure, so the use range of the liquid control valve can meet the requirements of gate valve, butterfly valve, globe valve, restrictor valve, check valve, floating ball valve, pressure reducing valve, pressure relief valve , electric valve and other valve technology, performance requirements, especially easy to achieve intelligent control of liquid flow.

Description of drawings

Fig. 1 is a schematic diagram of the basic structure of the first liquid control valve; wherein a) a front sectional view of the body, b) a partially enlarged front sectional view of the cover and groove, c) an overall front sectional view of the piston and the extended end face, d) sealing Circle and its partial enlarged front sectional view, e) schematic front sectional view of valve embodiment.

Figure 2 is a schematic diagram of the basic structure of the second type of liquid control valve; wherein a) body and a partially enlarged front sectional view of the groove, b) a front sectional view of the cover, c) the piston and the overall front sectional view of the extended end face, d) seal Circle and its partial enlarged front sectional view, e) schematic front sectional view of valve embodiment.

Figure 3 is a schematic diagram of the basic structure of the third liquid control valve; wherein a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) an overall front cross-sectional view of the piston and the extended end face, d) valve embodiment and sealing ring , a schematic diagram of a partially enlarged front section of the groove.

FIG. 4 is a schematic diagram of the basic structure of the fourth liquid control valve, and a schematic diagram of a front cross-section of an embodiment of the valve.

5 is a schematic diagram of the basic structure of the fifth liquid control valve; wherein a) a front cross-sectional view of the body, b) a partially enlarged front cross-sectional view of the cover and the concave groove, c) the piston and the extended end face as a whole and the U-shaped piston. Sectional view, d) V-shaped sealing ring and its partial enlarged front cross-sectional view, e) schematic front cross-sectional view of an embodiment of the valve.

Figure 6 is a schematic diagram of the basic structure of the sixth liquid control valve; wherein a) the body and the partially enlarged front sectional view of the concave groove, b) the front sectional view of the cover, c) the piston and the extended end face as a whole and the positive sectional view of the U-shaped piston Cross-sectional view, d) a front cross-sectional view of the sealing ring and its partial enlarged, e) a schematic front cross-sectional view of an embodiment of the valve.

7 is a schematic diagram of the basic structure of the seventh liquid control valve; a schematic diagram of an enlarged front sectional view of an embodiment of the valve and the concave groove.

8 is a schematic diagram of the basic structure of the eighth liquid control valve; a schematic diagram of a partially enlarged front section of an embodiment of the valve and the expansion port of the sealing ring.

9 is a schematic diagram of the sealing ring groove processing structure and the sealing ring assembly structure of the ninth liquid control valve; wherein a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and U-shaped Front sectional view of the piston, d) the sealing ring and its partial enlarged front sectional view, e) the front sectional view of the valve embodiment and the schematic diagram of the partial enlarged view of the concave groove.

Figure 10 is a schematic diagram of the sealing ring groove processing structure and the sealing ring assembly structure of the tenth liquid control valve; wherein a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and U-shaped Front sectional view of the piston, d) the sealing ring and its partial enlarged front sectional view, e) the front sectional view of the valve embodiment and the schematic diagram of the partial enlarged view of the concave groove.

Fig. 11 is the sealing ring groove processing structure and the sealing ring assembly structure of the eleventh liquid control valve; wherein a) a front sectional view of the body, b) a front sectional view of the cover, c) the piston and the extended end face as a whole and the U-shaped Front sectional view of the piston, d) the sealing ring and its partial enlarged front sectional view, e) the front sectional view of the valve embodiment and the schematic diagram of the partial enlarged view of the concave groove.

Figure 12 is a schematic diagram of the processing structure of the sealing ring groove and the sealing ring assembly structure of the twelfth liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and U-shaped Front sectional view of piston, d) front sectional view of seat, e) sealing ring and its partial enlarged front sectional view, f) frontal sectional view of valve embodiment and partial enlarged view of concave groove.

Figure 13 is a schematic diagram of the processing structure of the sealing ring groove and the sealing ring assembly structure of the thirteenth liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and the U-shaped Front sectional view of piston, d) front sectional view of seat, e) sealing ring and its partial enlarged front sectional view, f) frontal sectional view of valve embodiment and partial enlarged view of concave groove.

Figure 14 is a schematic diagram of the processing structure of the sealing ring groove and the sealing ring assembly structure of the fourteenth liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and the U-shaped Front sectional view of piston, d) front sectional view of seat, e) sealing ring and its partial enlarged front sectional view, f) frontal sectional view of valve embodiment and partial enlarged view of concave groove.

Figure 15 is a schematic diagram of the sealing ring groove processing structure and the sealing ring assembly structure of the fifteenth liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and the U-shaped Front sectional view of piston, d) front sectional view of seat, e) sealing ring and its partial enlarged front sectional view, f) front sectional view of valve embodiment and partial enlarged view of concave groove.

Figure 16 is a schematic diagram of the processing structure of the sealing ring groove and the sealing ring assembly structure of the sixteenth liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and the U-shaped Front sectional view of piston, d) front sectional view of seat, e) sealing ring and its partial enlarged front sectional view, f) frontal sectional view of valve embodiment and partial enlarged view of concave groove.

Figure 17 is a schematic diagram of the processing structure of the sealing ring groove and the sealing ring assembly structure of the seventeenth liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the piston and the extended end face as a whole and the U-shaped Front sectional view of piston, d) front sectional view of seat, e) sealing ring and its partial enlarged front sectional view, f) frontal sectional view of valve embodiment and partial enlarged view of concave groove.

Fig. 18 is the processing structure of the sealing ring groove and the sealing ring assembly structure of the eighteenth liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) the whole of the piston and the extended end face and the U-shaped piston , d) the front sectional view of the seat, e) the sealing ring and its partial enlarged front sectional view, f) the front sectional view of the valve embodiment and the partial enlarged view of the concave groove.

Figure 19 is a schematic diagram of the structure of a double check valve on the basic structure of a liquid control valve; a) a front sectional view of the body, b) a front sectional view of the cover, c) a front sectional view of the piston and the extended end face as a whole and the U-shaped piston, d) The front section of the sealing ring and its partial enlarged view, e) the schematic diagram of the front section of the valve embodiment and the partial enlarged view of the concave groove, the sealing ring and the upper stop.

Figure 20 is a schematic diagram of the structure of a double check valve under the basic structure of a liquid control valve; a) a front sectional view of the body, b) a front sectional view of the cover, c) a front sectional view of the piston and the extended end face as a whole and the U-shaped piston, d) The front section of the sealing ring and its partial enlarged view, e) the schematic diagram of the front section of the valve embodiment and the partial enlarged view of the concave groove, the sealing ring and the upper stop.

Figure 21 is a schematic diagram of the structure of a double check valve on the basic structure of another liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) a front cross-sectional view of the piston and its extended end face as a whole and a U-shaped piston , d) the front section of the seat, e) the sealing ring and its partial enlarged front section, f) the front section of the valve embodiment and the schematic diagram of the concave groove, the sealing ring, and the partial enlarged view of the upper stop.

Figure 22 is a schematic diagram of the structure of a double check valve under the basic structure of another liquid control valve; a) a front cross-sectional view of the body, b) a front cross-sectional view of the cover, c) a front cross-sectional view of the piston and the extended end face as a whole and the U-shaped piston , d) the front section of the seat, e) the sealing ring and its partial enlarged front section, f) the front section of the valve embodiment and the schematic diagram of the concave groove, the sealing ring, and the partial enlarged view of the upper stop.

Figure 23 is a schematic diagram of the basic structure of a liquid control valve and the structure of a restrictor valve;

Figure 24 is a schematic diagram of another basic structure of the liquid control valve and the structure of the restrictor valve;

Figure 25 is a schematic diagram of the basic structure of a liquid control valve electric valve structure;

Fig. 26 is a schematic diagram of the electric valve structure of the basic structure of another liquid control valve;

Figure 27 is a schematic diagram of a one-way one-way shut-off valve for a liquid control valve;

Figure 28 is a schematic diagram of a one-way double-shutoff valve for a liquid control valve;

Figure 29 is a schematic diagram of a liquid control valve check valve and shut-off valve;

Figure 30 is a schematic diagram of a two-way single shut-off valve for a liquid control valve;

Figure 31 is a schematic diagram of a two-way double shut-off valve for a liquid control valve;

Figure 32 is a schematic diagram of a liquid control valve valve float valve;

Figure 33 is a schematic diagram of a liquid control valve restrictor valve and check valve;

Figure 34 is a schematic diagram of a liquid control valve pressure reducing and pressure regulating valve;

Figure 35 is a schematic diagram of a liquid control valve relief valve.

Description of drawings:

Cover 1, seat 2, body 3, sealing ring groove 4, sealing ring 5, piston 6, piston inner cavity 7, body outlet inner cavity 8, outer ring of sealing ring 9, inner ring of sealing ring 10, piston outer Ring 11, body entry cavity 12, extended end face below the piston 13, body exit cavity stop 14, pipeline I15, valve I16, three-way valve 17, check valve 18, entry two-way valve I19, outlet Two-way valve II20, three-way I21, three-way II22, float valve 23, body outlet inner cavity flange 24, pipeline II25, liquid pool 26, three-way pilot valve I27, liquid inlet 28, handwheel 29, two-way Pilot valve 30, screw 31, three-way pilot valve II32, two-way valve III33, semi-closed check valve 34, pump 35, two-way valve IV36, two-way valve V37, sealing surface I38, screw 39, cut-off port 40, upper Outwardly extending part 41, lower end face 42, electric valve 43, shaft 44, rotary handwheel 45, T-ring groove seat 46, Type II sealing ring groove seat 47, sealing ring expansion port 48, concave 49 , V-shaped 50, piston inner diameter 51, sealing strip 52, sealing surface Ⅱ53, sealing surface Ⅲ54, screw 55, U-shaped 56, valve Ⅱ57.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. For the convenience of description, the words "up", "down", "left" and "right" appear in the following text, which only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

Example 1

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, the Z-type liquid control valve without diaphragm shaft sleeve spring of the present invention comprises a cover 1, a body 3, a sealing ring groove 4, a sealing ring 5, a piston 6 , the end face 13 extending below the piston, and the inner cavity stop 14 at the body outlet end. The sealing ring groove 4 is on the top of the cover 1, on the top of the body 3, on the top of the cover 1 and the body 3, the sealing ring 5 is installed in the sealing ring groove 4, and the piston 6 is placed in the sealing ring 5 , between the piston 6 and the extended end surface 13 below the piston is a whole, the sealing between the cover 1 and the body 3 is a whole, the outer ring 9 of the sealing ring is sealed with the groove 4 of the sealing ring and the sealing The inner ring 10 of the ring is sealed and slidably sealed with the outer ring 11 of the piston, so that the inner cavity 7 of the piston and the inner cavity 8 of the body outlet end are sealed. After the piston 6 moves, the extending end surface 13 below the piston fits and seals with the inner cavity stop 14 at the body outlet end, so that the inner cavity 12 at the body inlet end and the inner cavity 8 at the body outlet end are sealed. The piston inner cavity 7 is connected with the inner cavity 12 of the body inlet end and the inner cavity 8 of the body outlet end through pipeline connection, valve connection or pilot valve connection.

Example 2

In the above Z-type liquid control valve without diaphragm shaft sleeve spring, as shown in Figure 5, Figure 6, Figure 7, Figure 8, the plane of the sealing ring groove 4 is circular, and the structural shape of the cross section is concave 49, the plane of the sealing ring 5 is circular, the shape of the cross-section is V-shaped 50, the plane of the piston 6 is circular, the shape of the cross-section is U-shaped 56, the plane of the inner cavity stop 14 of the outlet end is It is a circular shape, the inner diameter of the inner cavity stop 14 at the outlet end is smaller than the outer diameter of the piston 6, the ring plane of the sealing ring groove 4 is parallel to the ring plane of the body outlet end inner cavity stop 14, and the center line is parallel. The position is the same, the position of the center line of the ring plane of the sealing ring groove 4 is the same and vertical as the center line of the piston 6 placed in the sealing ring 5, and the piston 6 is placed in the outer ring 11 of the piston in the sealing ring 5. It needs to be in contact with the inner ring 10 of the sealing ring. The direction of the piston inner diameter 51 of the piston 6 placed in the sealing ring 5 is toward the piston inner cavity 7 or the opposite direction to the piston inner cavity 7. The piston 6 and the piston are in the opposite direction. The lower extension end faces 13 are vertically connected and fixed as a whole. The lower extension end face 13 has a sealing surface I38. The outer ring 9 of the sealing ring is sealed with the sealing ring groove 4. The outer ring 9 of the sealing ring has elastic retention. It is in contact with the groove 4 of the sealing ring, the inner ring 10 of the sealing ring is sealed with the outer ring 11 of the piston and the sliding seal is that the inner ring 10 of the sealing ring has elasticity to keep the contact seal and sliding contact seal with the outer ring 11 of the piston. The outer ring 9 of the sealing ring and the inner ring 10 of the sealing ring have elastic retention. Once the direction of the expansion port 48 of the sealing ring is pressed by the liquid, the sealing ring 5 will expand and contract with the increase and decrease of the hydraulic pressure. If the sealing ring expands The sealing ring 5 will not expand and contract with the increase and decrease of hydraulic pressure when the port 48 is pressurized by hydraulic pressure in the opposite direction. The sealing ring 5 is installed in the sealing ring groove 4, and the direction of the sealing ring expansion port 48 is toward The inner cavity 7 of the piston is facing the opposite direction of the inner cavity 7 of the piston, and the cover 1 and the body 3 are sealed and fixed as a whole. The inner cavity 7 of the piston is connected with the inner cavity 12 of the body inlet end and the inner cavity 8 of the body outlet end through pipelines, valve connection, and pilot valve connection.

Specific description: the structure of the Z-type liquid control valve without diaphragm shaft sleeve spring of the present invention can make the Z-type liquid control valve without diaphragm shaft sleeve spring not need to install the diaphragm, the shaft rod, the shaft sleeve and the spring; The liquid can pass through the Z-type liquid control valve without diaphragm shaft sleeve spring in both directions; the Z-type liquid control valve without diaphragm shaft sleeve spring can close the liquid passage in both directions.

The working principle is shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, and Figure 8.

1. The inner cavity 7 of the piston, the inner cavity 12 of the body inlet end, and the inner cavity 8 of the body outlet end are connected through the pipeline I15, the valve I16, and the valve II57. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, it is closed. The valve I16 on the inner cavity 12 side of the body entry end, open the valve II57 on the body exit end cavity 8 side, the liquid in the body entry cavity 12 cannot enter the piston cavity 7, and the extended end face 13 below the piston is at the body entry end. The liquid in the inner cavity 12 leaves the inner cavity stop 14 at the outlet end of the body under the push of The cavity 7 is in communication with the inner cavity 8 of the body outlet end, so the pressure of the liquid in the inner cavity 7 of the piston and the inner cavity 8 of the body outlet end is the same, and the liquid in the inner cavity 12 of the body inlet end can pass through the mouth 14 of the inner cavity of the body outlet end Entry into the inner cavity 8 of the body outlet only depends on the overall weight of the piston 6 and the vertical and fixed connection with the extended end surface 13 below the piston and the friction of the inner ring 10 of the sealing ring to keep the contact seal and sliding contact seal with the outer ring 11 of the piston elastically. The resistance caused by the friction is very small because the inner ring 10 of the sealing ring has elasticity when the sealing ring 5 is not pressurized by the liquid. As long as the liquid in the end cavity 12 can overcome the overall weight of the vertical and fixed connection between the piston 6 and the extended end surface 13 below the piston, and the inner ring 10 of the sealing ring has elasticity, the friction caused by the contact seal and sliding contact seal with the piston outer ring 11 is maintained. Therefore, the pressure loss of the liquid flowing through the cavity stop 14 of the body outlet into the cavity 8 of the body outlet can be reduced due to the pressure loss of the resistance. It is very small, so that the starting pressure of the Z-type liquid control valve without a shaft sleeve spring is extremely small, so that the operating range of the Z-type liquid control valve without a shaft sleeve spring without a diaphragm is large.

2. The inner cavity 7 of the piston, the inner cavity 12 of the body inlet end, and the inner cavity 8 of the body outlet end are connected through the pipeline I15, the valve I16 and the valve II57. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, the body is opened. The valve I16 on the side of the inner cavity 12 of the inlet end closes the valve II57 on the side of the inner cavity 8 of the body outlet end, and the liquid in the inner cavity 12 of the body inlet end enters into the inner cavity 7 of the piston. It is not connected, so the liquid pressure in the piston cavity 7 and the valve body inlet cavity 12 is the same, because the liquid pressure entering the body outlet cavity 8 is the liquid pressure in the body inlet cavity 12 to overcome the piston 6. The overall weight and the inner ring 10 of the sealing ring, which is vertically and fixedly connected with the extending end surface 13 below the piston, can only enter into the inner cavity 8 of the body outlet end only because of the friction caused by the friction between the inner ring 10 of the sealing ring and the sliding contact seal between the piston outer ring 11 and the outer ring 11 of the piston. Therefore, there will be a very small pressure difference between the liquid pressure in the inner cavity 12 of the body inlet end and the liquid pressure in the inner cavity 8 of the body outlet end, because the inner ring 10 of the sealing ring has the elasticity to keep the sealing contact with the outer ring 11 of the piston. It is extremely small, and the friction of the piston outer ring 11 sliding in contact with the seal is also small. The outer seal ring 11 and the inner ring 10 of the seal ring are retained elastically, so the liquid will not leak into the inner cavity 8 of the body outlet. The area of the outer ring of the piston 6 is larger than the area of the inner ring of the inner cavity stop 14 at the outlet end of the body, so the piston 6 will move downward after being pressed, and the extended end surface 13 below the piston will be connected to the outlet end of the body when the piston 6 moves downward. The distance between the inner cavity stop 14 will gradually approach, and the liquid pressure difference between the inner cavity 12 of the body inlet end and the inner cavity 8 of the body outlet end will gradually increase. During the process of gradually increasing the liquid pressure, the direction of the expansion port 48 of the sealing ring Pressured by the liquid, the sealing ring 5 will expand with the increase of hydraulic pressure. At this time, the sealing ring 5 tends to expand in the sealing ring groove 4. After the sealing ring 5 is expanded, it will be between the sealing ring groove 4 and the sealing ring 5. The force that forms a ring makes the plane of the piston 6 and the groove 4 of the sealing ring tend to be vertical, so that the extending end face 13 below the piston and the inner cavity stop 14 of the body outlet end are kept in a position parallel to the distance; the piston 6 continues to descend, because The reason for the expansion of the sealing ring 5 The frictional resistance between the inner ring 10 of the sealing ring and the outer ring 11 of the piston sliding in contact with the seal will become larger and larger, which will cause the extended end surface 13 under the piston to stop with the inner cavity of the body outlet after the piston 6 moves down. When the distance between the port 14 is close to ensure that the piston 6 will not vibrate, so that the valve reaches the extension end surface 13 below the piston and the body outlet end cavity stop 14 is parallel to the seal, no vibration and no vibration, so there is no diaphragm shaft sleeve spring Z-type liquid For control valves, do not use springs to reset and increase the stability when closing the valve, and the shaft sleeve of the diaphragm to ensure that the lower extended end face 13 is in parallel with the inner cavity stop 14 of the valve body.

3. The inner cavity 7 of the piston, the inner cavity 12 of the body inlet end, and the inner cavity 8 of the body outlet end are connected through the pipeline I15, the valve I16, and the valve II57. When the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, it is opened. The valve I16 on the inner cavity 12 side of the body inlet end closes the valve II57 on the side of the inner cavity 8 of the body outlet end, the liquid in the inner cavity 8 of the body outlet end cannot enter the inner cavity 7 of the piston, while the liquid in the inner cavity 7 of the piston can Through the pipe I15 and the valve I16 on the side of the inlet cavity 12, the valve body flows into the inlet cavity 12 of the valve body. At this time, the liquid pressure in the piston cavity 7 is the same as the liquid pressure in the body inlet cavity 12. The area of the outer ring is larger than the area of the inner ring of the inner cavity stop 14 at the outlet end of the body, as long as the liquid pressure in the inner cavity 8 of the body outlet end is greater than the liquid pressure in the inner cavity 12 of the inlet end, it can overcome the piston 6 and extend below the piston The overall weight of the vertical and fixed connection of the end face 13 and the inner ring 10 of the sealing ring have the resistance caused by the friction between the inner ring 10 of the sealing ring and the sliding contact sealing of the piston outer ring 11, and the piston 6 will be pushed out by the liquid in the inner cavity 8 of the end. Pushed to move upward, the lower extension end surface 13 of the piston leaves the body outlet end cavity stopper 14 when the piston 6 moves upward, and the liquid in the body outlet end cavity 8 flows to the body inlet end cavity through the body outlet end cavity stopper 14 12, the valve is opened; during the valve opening process, the liquid pressure in the cavity 8 of the body outlet end and the liquid pressure difference in the inner cavity 12 of the body inlet end will become closer and closer, and the direction of the expansion port 48 of the sealing ring is affected by the liquid. The pressure seal ring 5 will expand and contract as the hydraulic pressure decreases. When the piston 6 moves to the point where the piston 6 is vertically fixedly connected to the lower end surface 13 of the piston, the overall weight and the inner ring 10 of the seal ring have elasticity to keep sliding contact with the outer ring 11 of the piston. When the resistance caused by the friction between the seals is large, the piston 6 will no longer move upward, so as long as the pressures of the two flow directions of the liquid are the same, the opening of the valve depends on the piston 6 and the extended end face below the piston. 13. The overall weight of the vertical fixed connection and the inner ring 10 of the sealing ring have the resistance caused by the friction between the inner ring 10 of the sealing ring and the sliding contact seal of the piston outer ring 11, so the valve can realize the flow from the inner cavity 8 of the body outlet to the body inlet. The end cavity 12, and the pressure loss of the liquid flowing from the body outlet end cavity 8 to the body inlet end cavity 12 is also small, so that the Z-type liquid control valve without diaphragm shaft sleeve spring can realize bidirectional flow under the condition of small pressure loss. .

4. The inner cavity 7 of the piston, the inner cavity 12 of the body inlet end, and the inner cavity 8 of the body outlet end are connected through the pipeline I15, the valve I16, and the valve II57. When the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, it is closed. The valve I16 on the side of the inner cavity 12 of the body inlet end opens the valve II57 on the side of the inner cavity 8 of the body outlet end, the liquid in the inner cavity 8 of the body outlet end enters the inner cavity 7 of the piston, and the liquid in the inner cavity 7 of the piston cannot pass through. The pipeline I15 and the valve I16 on the side of the inner cavity 12 of the inlet end flow into the inner cavity 12 of the inlet end of the valve body. At this time, the liquid pressure in the inner cavity 7 of the piston is the same as the liquid pressure in the inner cavity 8 of the body outlet end, as long as the piston 6 and the piston The overall weight of the vertical and fixed connection of the lower extending end face 13 can overcome the resistance caused by the friction between the inner ring 10 of the sealing ring and the sliding contact seal between the piston outer ring 11 and the piston 6, and the piston 6 can go down. When pressed by the liquid, the inner ring 10 of the sealing ring has elasticity to keep it in contact with the outer ring 11 of the piston. The elasticity of the seal is extremely small, and the resistance caused by friction is also small. After the piston 6 moves down, the extended end face 13 is matched with the inner cavity stop 14 at the outlet end of the body to seal and cut off the liquid in the inner cavity 8 of the outlet end of the valve body from flowing to the inner cavity 12 of the body inlet end, and the valve is closed to realize the shaft sleeve spring without diaphragm The Z-type liquid control valve can be closed in both directions.

Example 3

In the above Z-type liquid control valve without diaphragm shaft sleeve spring, the sealing ring groove 4 is processed on the top of the cover 1, on the top of the body 3, on the top of the cover 1 and the body 3, and the processing form is three. Choose one, the number of the processing sealing ring grooves 4 is one or more, the installed sealing ring 5 has the same number and matching type as the processing sealing ring grooves 4, and the cover 1 and the body 3 are sealed. The connection is fixed and connected as a whole with screws 39, and the sealing is sealed with a sealing strip 52, as shown in Figure 9, Figure 10, and Figure 11.

Example 4

In the above Z-type liquid control valve without diaphragm shaft sleeve spring, a seat 2 is added between the cover 1 and the body 3, the sealing ring groove 4 is machined on the top of the seat 2, and is machined on the cover 1 and the seat 2. The top is processed on the top of the seat 2 and the body 3, on the top of the cover 1, the seat 2 and the body 3, and on the top of the cover 1 and the body 3. Choose one of the five processing forms, and the number of the grooves 4 of the processing seal ring 1 or more, the number of installed sealing rings 5 is the same as the number of processed sealing ring grooves 4, and the model is matched, and the sealing connection between the cover 1, the seat 2, and the body 3 is fixed and connected as a whole by screws 39, The sealing is sealed with a sealing strip 52, as shown in Figure 12, Figure 13, Figure 14, Figure 15, and Figure 16.

Example 5

In the above Z-type liquid control valve without diaphragm shaft sleeve spring, the sealing ring groove 4 is processed on the I-type sealing ring groove seat 46, and the number of processing sealing ring grooves 4 is one or more. The number of installed sealing rings 5 is the same as that of the processed sealing ring grooves 4, and the models match. 52 is sealed, the sealing connection between the cover 1 and the body 3 is fixed and connected as a whole by screws 39, and the sealing is sealed by a sealing strip 52, as shown in FIG. 17 .

Example 6

In the above Z-type liquid control valve without diaphragm shaft sleeve spring, a type II sealing ring groove seat 47 is added between the cover 1 and the body 3, and the sealing ring groove 4 is processed in the type II sealing ring groove On the seat 47, the number of processing is 1 or more, the number of the installed sealing ring 5 is the same as the number of the sealing ring groove 4 to be processed, and the model is matched. The cover 1, the type II sealing ring groove seat 47, and the body 3 The sealing connection between them is fixed and connected as a whole by using screws 39, and the sealing adopts sealing strip 52, as shown in FIG. 18 .

Example 7

In the above-mentioned Z-type liquid control valve without diaphragm shaft sleeve spring, there is a cut-off port 40 above or below the sealing ring groove 4, and the ring plane of the cut-off port 40 is connected to the sealing ring groove. The distance between the planes of the rings of 4 is parallel, and the centerline is the same. The upward extending portion 41 of the piston 6 or the lower end surface 42 of the piston 6 is matched and sealed with the cut-off port 40 after the piston 6 moves down. At the same time, the lower part of the piston The extending end surface 13 is matched and sealed with the inner cavity stop 14 at the outlet end of the body, the upper and outward extending part 41 of the piston 6 has a sealing surface II53, the lower end surface 42 of the piston 6 has a sealing surface III54, and the cover 1 , The sealing connection between the bodies 3 is fixed and connected as a whole by screws 39, and the sealing is sealed by a sealing strip 52, as shown in Figure 19 and Figure 20.

Example 8

In the above Z-type liquid control valve without diaphragm shaft sleeve spring, a seat 2 is added between the cover 1 and the body 3, and there is a cut-off port 40 on the seat 2, and the ring plane of the cut-off port 40 is connected to the seal The ring plane spacing of the ring groove 4 is parallel, and the center line position is the same. The upper outward extension portion 41 of the piston 6 or the lower end surface 42 of the piston 6 is matched and sealed with the cut-off port 40 after the piston 6 moves down, and at the same time. The lower extending end face 13 of the piston is matched and sealed with the inner cavity stop 14 of the body outlet end, the upper outward extending part 41 of the piston 6 has a sealing surface II53, and the lower end face 42 of the piston 6 has a sealing surface III54, so The sealing connection between the cover 1 , the seat 2 and the body 3 is fixed and connected as a whole by screws 39 , and the sealing is sealed by a sealing strip 52 , as shown in FIG. 21 and FIG. 22 .

Example 9

In the above-mentioned Z-type liquid control valve without diaphragm shaft sleeve spring, a shaft rod 44 is installed on the cover 1 and extends into the piston inner cavity 7, and the contact point between the shaft rod 44 and the cover 1 is sealed, so The shaft rod 44 can be moved up and down by rotating the hand wheel 45 . As shown in Figure 23 and Figure 24.

Further specific descriptions of Example 1, Example 2, Example 3, Example 4, Example 5, Example 6, Example 7, Example 8, and Example 9:

Specific instructions 1

In the above Z-type liquid control valve without diaphragm shaft sleeve spring, when installing the sealing ring 5, it is necessary to install the sealing ring 5 according to the direction of the liquid flow. The inner cavity 8 of the outlet end flows, and the direction of the expansion port 48 of the sealing ring is installed toward the inner cavity 7 of the piston. The working condition only requires the liquid to flow from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, and the direction of the expansion port 48 of the sealing ring is toward the inner cavity 12 of the body inlet end. Install in the opposite direction of the piston inner cavity 7; the working conditions require the liquid to flow in both directions. When installing the sealing ring 5, the sealing ring 5 facing the piston inner cavity 7 needs to have sealing ring expansion ports 48 in both directions; the working conditions only require No diaphragm shaft sleeve spring Z-type liquid control valve one-way opening and closing, the number of installed sealing rings 5 is 1 or more, if it needs to be opened and closed in both directions, the number of installed sealing rings 5 is 2 to More than 2; through different processing structures of the sealing ring groove 4 and the assembly form of the sealing ring 5, it can be formed to meet the needs of various working conditions for the Z-type liquid control valve without diaphragm shaft sleeve spring.

Specific instructions 2:

When the vertical connection between the piston 6 and the extending end face 13 below the piston is fixed as a whole, the direction of the piston inner diameter 51 of the piston 6 is directed towards the piston inner cavity 7 or the connection and fixation is carried out in the opposite direction of the piston inner cavity 7 to meet the requirement of no membrane. The needs of the working conditions of the Z-type liquid control valve of the shaft sleeve spring.

Specific instructions 3:

In the above-mentioned Z-type liquid control valve without diaphragm shaft sleeve spring, the structure of Fig. 17 and Fig. 18 can be used to replace the sealing ring seat of the valve and the piston as a set. After the piston and sealing ring seat are damaged, there is no diaphragm. Other parts of the shaft sleeve spring Z-type liquid control valve do not need to be replaced. Due to its unique manufacturing and assembly method, maintenance is extremely convenient, and professional technicians are not required to replace it. Therefore, the service life of the Z-type liquid control valve without diaphragm shaft sleeve spring can be basically the same as that of the pipeline.

Specific instructions 4:

In the above-mentioned Z-type liquid control valve without diaphragm shaft sleeve spring, the structure of Fig. 19, Fig. 20, Fig. 21 and Fig. 22 can be used to make the valve sealing achieve a better sealing effect.

working principle:

1. As shown in Figure 19 and Figure 21, the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, and the outward extension portion 41 of the upper end of the piston is matched and sealed with the cut-off port 40 after the piston 6 moves down, and at the same time. The extended end face 13 below the piston matches the inner cavity stop 14 of the body outlet end to seal off the liquid flowing from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, and the valve is closed; When the lower end surface 42 of the piston is in contact with the cut-off port 40 after the piston 6 moves downward, the liquid in the piston inner cavity 7 is sealed at this position. Because the cut-off port is sealed, the cut-off port seal wears very little, and it will be used with the use. The sealing time is increased and the sealing is better, so no leaking liquid will penetrate into the inner cavity 8 of the body outlet end, so as to achieve a completely non-penetrating sealing of the valve.

2. As shown in Figure 20 and Figure 22, the lower double stop valve of the Z-type liquid control valve without a diaphragm shaft sleeve spring, the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, and the lower end face of the piston 42 After the piston 6 moves down, it fits and seals with the cut-off port 40, and at the same time, the extending end face 13 below the piston fits with the body outlet end cavity stopper 14 to seal off the liquid flowing from the body inlet end cavity 12 to the body outlet end cavity 8, and the valve is closed. ; Process a cut-off port 40 below the groove 4 of the sealing ring. When the lower end face 42 of the piston is in line with the cut-off port 40 after the piston 6 moves down, the liquid in the piston cavity 7 is sealed at this position, because it is The cut-off port is sealed, and the wear of the cut-off port seal is extremely small, and it will seal better with the increase of use time, so no leaking liquid will penetrate into the inner cavity 8 of the body outlet, so as to achieve a completely non-penetrating sealing of the valve .

Specific instructions 5:

If you want to adjust the flow rate statically, it is best to use the structure in Figure 23 and Figure 24.

working principle:

As shown in Figure 23 and Figure 24, the diaphragmless shaft sleeve spring Z-type liquid control valve restrictor valve, the piston 6 has two installation forms, the direction of the piston inner diameter port 51 of the piston 6 placed in the seal ring 5 Towards the piston inner cavity 7 or the opposite direction to the piston inner cavity 7; the shaft rod 44 can be moved up and down by rotating the handwheel 45 to move the shaft rod 44 to the set position, after the piston 6 rises, it will be held up by the shaft rod 44 and can no longer Therefore, the lower extension end face 13 of the piston and the body outlet end cavity stopper 14 can be maintained at a set fixed opening, which limits the flow between the lower extension end face 13 of the piston and the body outlet end cavity stopper 14 , to achieve static current limiting.

Example 10

In the above-mentioned Z-type liquid control valve without diaphragm shaft sleeve spring, the valve is equipped with an electric actuator 43, and the installed electric actuator 43 is used to perform valve switching, as shown in Fig. 25 and Fig. 26 .

Specific instructions:

Use the electric actuator 43 to open and close the valve, and use the electric actuator 43 instead of manual to open and close the valve to realize remote control of the Z-type liquid control valve without diaphragm shaft bushing spring: once the power is cut off, the actuator 43 can be removed and used Ordinary tools open and close the valve.

Example 11

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve one-way one-stop valve, the inner cavity 7 of the piston is connected to the three-way valve 17 through the pipeline I15, and one outlet of the three-way valve 17 is connected to the inner cavity of the valve body through the pipeline I15. 12. The other outlet is connected to the inner cavity 8 of the valve body outlet through the pipeline I15, as shown in Figure 27.

Specific description: In this embodiment, pipes and valves can be assembled by using any basic structure of the present invention, the processing form of the groove of the sealing ring, and the assembly structure of the sealing ring, as shown in FIG. 27 .

working principle:

1. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, the switch position of the three-way ball valve 17 is placed in the inner cavity 7 of the piston and the inner cavity 12 of the body inlet end to close, and the inner cavity 7 of the piston and the inner cavity 12 of the body outlet end are closed. When the cavity 8 is opened, the liquid in the inner cavity 12 of the body inlet end cannot enter the piston inner cavity 7 through the pipe I15 and the three-way ball valve 17, and at the same time, the liquid in the piston inner cavity 7 can pass through the three-way ball valve 17 and enter the body through the pipe I15. In the end cavity 8, the piston 6 will not be pressurized at this time, and the extending end surface 13 below the piston leaves the body outlet end cavity stopper 14 under the push of the liquid in the body entry end cavity 12, and the body enters the body cavity 12. The liquid enters into the inner cavity 8 of the body outlet end through the inner cavity stop 14 of the body outlet end, and the valve is opened; the switch position of the three-way ball valve 17 is placed in the inner cavity 7 of the piston and the inner cavity 12 of the body inlet end to open, and the inner cavity 7 of the piston is opened. It is closed with the inner cavity 8 of the body outlet end, and the liquid in the inner cavity 12 of the body inlet end enters the piston inner cavity 7 through the pipeline I15 and the three-way ball valve 17, and the liquid in the piston inner cavity 7 cannot pass through the three-way ball valve 17. I15 enters into the inner cavity 8 of the body outlet. Since the area of the outer ring of the piston 6 is larger than the area of the inner ring of the stop 14 of the inner cavity of the body outlet, the piston 6 moves downward under pressure, and the extended end face 13 below the piston is in the piston 6. After the movement goes down, the liquid flowing from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end is sealed and sealed, and the valve is closed.

2. When the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, place the switch position of the three-way ball valve 17 in the inner cavity 7 of the piston and the inner cavity 12 of the body inlet end to close, and the inner cavity 7 of the piston and the inner cavity 12 of the body outlet end are closed. When the cavity 8 is opened, the liquid in the cavity 8 at the outlet end of the valve body enters the piston cavity 7 through the pipe I15 and the three-way ball valve 17, while the liquid in the piston cavity 7 cannot enter the valve body through the three-way ball valve 17 and the pipe I15. In the inner cavity 12 of the inlet end, when the liquid pressure in the inner cavity 7 of the piston is the same as the pressure of the liquid in the inner cavity 8 of the body outlet end, the piston 6 moves downward under the action of its own weight, and the extending end surface 13 below the piston moves in the piston 6 After descending, it matches with the body outlet end cavity stop 14, seals off the liquid flowing from the body outlet end cavity 8 to the body inlet end cavity 12, and the valve closes; the switch position of the three-way ball valve 17 is placed in the piston cavity 7 and the body inlet end The inner cavity 12 is opened, the inner cavity 7 of the piston and the inner cavity 8 of the body outlet end are closed, and the liquid in the inner cavity 8 of the body outlet end cannot enter the inner cavity 7 of the piston through the pipe I15 and the three-way ball valve 17, and the liquid in the inner cavity 7 of the piston cannot enter. The liquid enters the inner cavity 12 of the inlet end of the body through the three-way ball valve 17 and the pipe I15. Since the area of the outer ring of the piston 6 is larger than the area of the inner ring of the stop 14 of the inner cavity of the outlet end of the body, the piston 6 is blocked by the outlet end of the body. The liquid in the inner cavity 8 pushes upwards, and the extending end surface 13 at the bottom of the piston leaves the body outlet end cavity stopper 14 when the piston 6 moves upward, and the liquid in the body outlet end cavity 8 flows through the body outlet end inner cavity stopper 14. When the body enters the inner cavity 12 of the end, the valve is opened.

3. Specific description: When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, or when the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, after operating the three-way ball valve 17, the direction of the liquid flow It can only be connected in one direction, and the other direction is blocked, so it only has the function of one-way opening and one-way interception.

Example 12

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve is a one-way double shut-off valve, the piston inner cavity 7 is connected to the three-way valve 17 through the pipeline I15, and one outlet of the three-way valve 17 is connected to the valve through the pipeline I15 and the check valve 18. The inner cavity 12 at the inlet end of the body, and the other outlet is connected to the inner cavity 8 at the outlet end of the valve body through the pipeline I15, as shown in Figure 28.

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes and valves under the condition of following the principles of the present invention, as shown in FIG. 28 .

1. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, the switch position of the three-way ball valve 17 is placed in the inner cavity 7 of the piston and the inner cavity 12 of the body inlet end to close, and the inner cavity 7 of the piston and the inner cavity 12 of the body outlet end are closed. When the cavity 8 is opened, the liquid in the inner cavity 12 of the body entering end cannot enter the inner cavity 7 of the piston through the pipeline I15, the check valve 18 and the three-way ball valve 17, and the liquid in the inner cavity 7 of the piston can pass through the three-way ball valve 17, through the pipeline I15 enters the inner cavity 8 of the body outlet end, and the piston 6 will not be pressurized at this time, and the extending end surface 13 below the piston leaves the inner cavity 14 of the valve body outlet end under the push of the liquid in the body inlet end cavity 12, and the body enters The liquid in the inner cavity 12 of the end enters into the inner cavity 8 of the body outlet through the mouth 14 of the inner cavity of the outlet end, and the valve is opened; the switch position of the three-way ball valve 17 is placed in the inner cavity 7 of the piston and the inner cavity 12 of the inlet end of the body is opened, and the piston is opened. The inner cavity 7 and the inner cavity 8 of the valve body outlet end are closed, and the liquid in the inner cavity 12 of the body inlet end enters the inner cavity 7 of the piston through the pipe I15, the check valve 18 and the three-way ball valve 17, and the liquid in the inner cavity 7 of the piston enters the inner cavity 7 of the piston It cannot enter the inner cavity 8 of the body outlet end through the three-way ball valve 17 and the pipe I15. Because the outer ring area of the piston 6 is larger than the inner ring ring area of the stop 14 of the body outlet end, the piston 6 moves downward under pressure. After the piston 6 moves downward, the extending end surface 13 of the piston is matched with the inner cavity stop 14 of the body outlet end to seal and cut off the liquid flowing from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, and the valve is closed.

2. When the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, place the switch position of the three-way ball valve 17 in the inner cavity 7 of the piston and the inner cavity 12 of the body inlet end to close, and the inner cavity 7 of the piston and the inner cavity 12 of the body outlet end are closed. When the cavity 8 is opened, the liquid in the inner cavity 8 of the body outlet enters into the inner cavity 7 of the piston through the pipe I15 and the three-way ball valve 17, and the liquid in the inner cavity 7 of the piston cannot pass through the three-way ball valve 17, the check valve 18, and the pipe I15. Entering into the inner cavity 12 of the body entry end, when the liquid pressure in the inner cavity 7 of the piston is the same as the pressure of the liquid in the inner cavity 8 of the body outlet end, the piston 6 moves downward under the action of its own weight, and the extended end surface 13 below the piston is in the piston. 6 After the movement goes down, it matches with the stop 14 of the cavity at the outlet end of the body, and seals off the liquid flowing from the inner cavity 8 at the outlet end of the body to the inner cavity 12 at the inlet end of the body, and the valve is closed; the switch position of the three-way ball valve 17 is placed in the inner cavity 7 of the piston and the body The inner cavity 12 of the inlet end is opened, the inner cavity 7 of the piston and the inner cavity 8 of the body outlet end are closed, and the liquid in the inner cavity 8 of the body outlet end cannot enter the inner cavity 7 of the piston through the pipeline I15 and the three-way ball valve 17, and the inner cavity 7 of the piston is at the same time. The liquid in the valve can not enter the body entry cavity 12 through the three-way ball valve 17, the check valve 18 and the pipeline I15, so the piston 6 will not move under pressure, and the valve cannot be opened, so the purpose of one-way opening and two-way closing is achieved. .

Example 13

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve is a check valve and a shut-off valve. The inner cavity 7 of the piston is connected to the inner cavity 12 of the body through the pipeline I15 and the two-way valve I19 at the inlet end. The inner cavity 7 of the piston passes through the pipeline I15. , Outlet two-way valve II20 connects the inner cavity 8 of the outlet end, as shown in Figure 29.

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes and valves under the condition of following the principles of the present invention, as shown in FIG. 29 .

working principle:

1. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, close the two-way valve I19 at the inlet end and open the two-way valve II20 at the outlet end, and the liquid in the inner cavity 12 of the body inlet end cannot flow into the inner cavity 7 of the piston. , and the liquid in the piston cavity 7 can flow into the body outlet cavity 8 through the pipeline I15 and the outlet two-way valve II20. At this time, the piston 6 will not be pressurized, and the extended end face 13 below the piston is in the valve body inlet cavity. The liquid in 12 leaves the inner cavity stop 14 at the outlet end of the body under the push of the liquid, and the liquid in the inner cavity 12 of the body inlet end enters into the inner cavity 8 of the body outlet end through the inner cavity stop 14 at the outlet end of the valve body, and the valve opens; When flowing from the cavity 8 of the body outlet end to the inner cavity 12 of the valve body inlet end, the size of the liquid pressure in the inner cavity 7 of the piston depends on the size of the liquid in the inner cavity 8 of the body outlet end entering the inner cavity 7 of the piston. When the liquid pressure in the cavity 7 is the same as the liquid pressure in the cavity 8 of the body outlet, the piston 6 will move downward under the action of its own weight, and the extended end surface 13 below the piston stops with the inner cavity of the body outlet after the piston 6 moves downward. The port 14 fits and seals off the liquid in the cavity 8 at the outlet end of the valve body to flow to the inner cavity 12 at the inlet end of the valve body, and the valve is closed to achieve the purpose of non-return.

2. When the liquid flows from the body outlet cavity 8 to the body inlet cavity 12, close the outlet two-way valve II20 and open the inlet two-way valve I19, the liquid in the body outlet cavity 8 cannot flow into the piston cavity 7 , and the liquid in the piston cavity 7 can flow into the valve body inlet cavity 12 through the pipeline I15 and the inlet two-way valve I19, because the outer ring area of the piston 6 is larger than the body outlet cavity stop 14. The area of the inner ring, the piston 6 is pushed upward by the liquid in the cavity 8 of the valve body outlet, the extending end surface 13 below the piston leaves the inner cavity stop 14 of the body outlet when the piston 6 moves upward, and the inner cavity 8 of the body outlet The liquid in the piston flows into the body inlet end cavity 12 through the body outlet end cavity stop 14, and the valve is opened; when the liquid flows from the body inlet end cavity 12 to the body outlet end cavity 8, the liquid pressure in the piston cavity 7 The size depends on the size of the liquid in the inner cavity 12 of the body entry end entering the inner cavity 7 of the piston. When the pressure in the inner cavity 7 of the piston is the same as that in the inner cavity 12 of the body entry end, the area of the outer ring of the piston 6 is larger than The inner ring area of the inner cavity stop 14 at the outlet end of the valve body, the piston 6 will move downward under the action of the liquid pressure, and the extended end surface 13 under the piston is matched with the inner cavity stop 14 at the outlet end of the valve body after the piston 6 moves downward. The liquid in the inner cavity 12 at the inlet end of the sealing and cutting body flows to the inner cavity 8 at the outlet end of the body, and the valve is closed to achieve the purpose of non-return.

3. Specific description: When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, or when the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, operate the inlet two-way valve I19 and the outlet end. Two-way valve II20, so that one two-way valve is opened and the other two-way valve is closed, there will be one liquid flow direction is closed, so it has the function of non-return and shut-off.

Example 14

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve is a two-way single shut-off valve. The inner cavity 7 of the piston is connected to the inner cavity 12 of the inlet end through the pipeline I15, the two-way valve I19 of the inlet end, and the semi-closed check valve 34. The cavity 7 is connected to the inner cavity 8 at the outlet end of the body through the pipeline I15, the two-way valve II20 at the outlet end, and the semi-closed check valve 34, as shown in FIG. 30 .

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes and valves under the condition of following the principles of the present invention, as shown in FIG. 30 .

working principle:

1. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, open the two-way valve I19 at the inlet end and the two-way valve II20 at the outlet end. The check valve 34 is half-closed, and the semi-closed check valve 34 installed on the pipe I15 in the inner cavity 8 of the body outlet end is fully opened, and the liquid in the inner cavity 12 of the body inlet end passes through the pipe I15, the semi-closed check valve 34, The inlet two-way valve I19 and the pipeline I15 enter the piston cavity 7. Since the semi-closed check valve 34 installed on the pipe I15 of the body outlet cavity 8 is fully open, the amount of liquid entering the piston cavity 7 is required. It is smaller than the amount flowing into the cavity 8 of the body outlet, so the piston 6 will not be pressurized, and the extending end surface 13 below the piston leaves the inner cavity 14 of the body outlet under the push of the liquid in the inner cavity 12 of the body inlet, and the body enters The liquid in the inner cavity 12 of the end enters into the inner cavity 8 of the body outlet through the inner cavity stop 14 of the body outlet, and the valve is opened; open the two-way valve I19 at the input end, and close the two-way valve II20 at the outlet end, and it is installed in the valve body at this time. The half-closed check valve 34 on the pipeline I15 of the inner cavity 12 of the inlet end is half-closed, and there is no full check, so that the liquid in the inner cavity 12 of the inlet end can pass through the half-closed check valve 34 and the two-way inlet end. Valve I19 and pipe I15 enter into piston cavity 7. Because the outlet two-way valve II20 is closed, the liquid in the body entry cavity 12 cannot flow into the body exit cavity 8, and the outer ring area of the piston 6 is larger than the above-mentioned The inner ring area of the inner cavity stop 14 at the body outlet end, the piston 6 moves downward under pressure, and the extended end surface 13 under the piston matches with the body outlet end cavity stop 14 after the piston 6 moves downward to seal and cut off the body inlet end cavity 12 When the liquid flows to the inner cavity 8 of the body outlet, the valve is closed.

2. When the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, open the two-way valve I19 at the inlet end and the two-way valve II20 at the outlet end. The check valve 34 is half-closed, and the half-closed check valve 34 installed on the pipe I15 of the inner cavity 12 of the body inlet end is fully opened, and the liquid in the inner cavity 8 of the body outlet end passes through the pipe I15, the half-closed check valve 34, The outlet two-way valve II20 and the pipeline I15 enter the piston cavity 7. Since the semi-closed check valve 34 installed on the pipe I15 of the body entry cavity 12 is fully open, the amount of liquid entering the piston cavity 7 is required. is smaller than the amount flowing into the inner cavity 12 of the body inlet end, because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the inner cavity 14 of the body outlet end, the piston 6 is pushed upward by the liquid in the inner chamber 8 of the body outlet end When the piston 6 moves upward, the extending end surface 13 of the lower part of the piston leaves the inner cavity stop 14 of the body outlet end, and the liquid in the inner cavity 8 of the body outlet end flows into the inner cavity 12 of the body inlet end through the inner cavity stop 14 of the body outlet end , the valve opens; close the inlet two-way valve I19, and open the outlet two-way valve II20. At this time, the half-closed check valve 34 installed on the pipe I15 in the inner cavity 8 of the valve body is half closed, but not all closed. The liquid in the cavity 8 at the outlet end of the valve body can be made to enter the inner cavity 7 of the piston through the pipeline I15, the two-way valve II20 at the output end of the semi-closed check valve 34, and the pipeline I15. The liquid in the end cavity 8 cannot flow from the piston cavity 7 to the body entry cavity 12. When the liquid pressure in the piston cavity 7 is the same as the liquid pressure in the body exit cavity 8, the piston 6 will be under its own weight. It moves downward under the action of the piston 6. After the piston 6 moves downward, the extending end face 13 matches with the inner cavity stop 14 at the outlet end of the body, and the liquid in the inner cavity 8 at the outlet end of the sealing and cutting body flows to the inner cavity 12 at the inlet end of the valve body, and the valve is closed.

3. Specific description: When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end or when the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, open the inlet two-way valve I19 and the outlet two Through valve II20, the liquid can pass through the valve in both directions, closing one of the two-way valves can close the liquid passing through the valve in one direction, so the valve has the function that the liquid can pass through the valve in both directions and block flow in one direction.

Example 15

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve is a two-way double shut-off valve. The inner cavity 7 of the piston is connected to a three-way I21 through the two-way valve IV36. The outlet of the check valve 18 is connected to the inner cavity 12 of the body through the pipeline I15, the outlet of a check valve 18 is connected to the inner cavity 8 of the outlet end of the body through the pipeline I15, and the inner cavity 7 of the piston is connected to a three-way II22 through the two-way valve V37. A check valve 18 is installed at the two outlets of the three-way II22. The outlet of one check valve 18 is connected to the inner cavity 12 of the body through the pipeline I15, and the outlet of a check valve 18 is connected to the inner cavity 8 of the outlet end of the body through the pipeline I15. , as shown in Figure 31.

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes and valves under the condition of following the principles of the present invention, as shown in FIG. 31 .

working principle:

1. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, close the two-way valve IV36 and open the two-way valve V37. In this state, the two-way valve IV36 disconnects the body inlet end connected to the three-way I21. The liquid in the inner cavity 12 and the inner cavity 8 of the body outlet enters into the inner cavity 7 of the piston; the two-way valve V37 is in an open state, and the three-way II22 connecting the two-way valve V37 is connected to the inner cavity of the body through the check valve 18 and the pipe I15. 12, but the check valve 18 does not return to the body entry cavity 12, so the liquid in the body entry cavity 12 cannot enter the piston cavity 7; the two-way valve Ⅴ37 is in the open state, connecting the two-way valve Ⅴ37 The three-way II22 through the check valve 18 and the check valve 18 in the inner cavity 8 of the outlet end of the pipe I15 do not return to the liquid in the inner cavity 7 of the piston, so the liquid in the inner cavity 7 of the piston can pass through the two-way valve Ⅴ37 , The three-way II22 flows into the inner cavity 8 of the body outlet end through the check valve 18 and the pipe I15. At this time, the piston 6 will not be pressurized, and the extending end face 13 below the piston is driven by the liquid in the inner cavity 12 of the body inlet end. Leaving the inner cavity stop 14 of the body outlet end, the liquid in the inner cavity 12 of the body inlet end enters into the inner cavity 8 of the body outlet end through the inner cavity stop 14 of the body outlet end, and the valve is opened.

2. When the liquid flows from the inner cavity 8 of the body outlet to the inner cavity 12 of the body inlet, close the two-way valve IV36 and open the two-way valve V37. In this state, the two-way valve IV36 disconnects the body inlet end connected to the three-way I21. The liquid in the inner cavity 12 and the inner cavity 8 of the body outlet end enters the inner cavity 7 of the piston; the two-way valve V37 is in an open state, and the three-way II22 connecting the two-way valve V37 is connected to the inner cavity 8 of the outlet end of the body through the check valve 18 and the pipe I15 , but the check valve 18 does not return to the inner cavity 8 of the body outlet, so the liquid in the inner cavity 8 of the body outlet cannot enter the inner cavity 7 of the piston; The three-way II22 through the check valve 18 and the check valve 18 connecting the inlet end cavity 12 of the pipe I15 does not return to the liquid in the piston cavity 7, so the liquid in the piston cavity 7 can pass through the two-way valve V37, The three-way II22 flows into the inner cavity 12 of the body inlet end through the check valve 18 and the pipe I15. Since the outer ring area of the piston 6 is larger than the inner ring area of the inner cavity stop 14 of the body outlet end, the piston 6 is blocked by The liquid in the inner cavity 8 of the body outlet pushes upward movement, the extending end surface 13 below the piston leaves the inner cavity stop 14 of the body outlet when the piston 6 moves upward, and the liquid in the inner cavity 8 of the body outlet passes through the inner cavity of the body outlet. The stop 14 flows into the inner cavity 12 of the body inlet end, and the valve is opened.

3. When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, open the two-way valve IV36 and close the two-way valve V37. In this state, the two-way valve V37 disconnects the body inlet end of the three-way II22 connection. The liquid in the inner cavity 12 and the inner cavity 8 of the body outlet enters into the inner cavity 7 of the piston, the two-way valve IV36 is open, and the three-way I21 connecting the two-way valve IV36 is connected to the inner cavity of the outlet end of the body through the check valve 18 and the pipeline I15. 8, but the check valve 18 checks the liquid in the inner cavity 8 of the piston, so the liquid in the inner cavity 12 of the body inlet end cannot enter the inner cavity 8 of the body outlet end, and the two-way valve IV36 is in the open state, connecting the two The three-way I21 of the valve IV36 is connected to the body entry cavity 12 through the check valve 18 and the pipeline I15, but the check valve 18 does not return to the liquid in the body entry cavity 12, so the liquid in the body entry cavity 12 is not returned. The liquid can enter the piston inner cavity 7, because the outer ring area of the piston 6 is larger than the inner ring area of the inner cavity stop 14 of the body outlet, the piston 6 moves downward under pressure, and the extended end face 13 below the piston is in the piston. 6 After the movement goes down, the liquid flowing from the inner cavity 12 of the inlet end of the body to the inner cavity 8 of the body outlet end is sealed and sealed, and the valve is closed.

4. When the liquid flows from the inner cavity 8 of the body outlet to the inner cavity 12 of the body inlet, open the two-way valve IV36 and close the two-way valve V37. In this state, the two-way valve V37 disconnects the three-way II22 connection of the body inlet end. The liquid in the inner cavity 12 and the inner cavity 8 of the body outlet end enters the inner cavity 7 of the piston, the two-way valve IV36 is open, and the three-way I21 connecting the two-way valve IV36 is connected to the inner cavity of the body through the check valve 18 and the pipe I15. 12, but the check valve 18 checks the liquid in the inner cavity 7 of the piston, so the liquid in the inner cavity 8 of the body outlet end cannot enter the inner cavity 12 of the body inlet end, and the two-way valve IV36 is in the open state, connecting the two The three-way I21 of the valve IV36 is connected to the inner cavity 8 of the outlet end of the body through the check valve 18 and the pipeline I15, but the check valve 18 does not return to the liquid in the inner cavity 8 of the outlet end of the body, so the liquid in the inner cavity 8 of the outlet end of the body does not return. The liquid can enter the piston cavity 7. When the liquid pressure in the piston cavity 7 is the same as the liquid pressure in the body outlet cavity 8, the piston 6 moves downward under the action of its own weight, and the end surface 13 extends below the piston. After the piston 6 moves downward, it fits with the mouth 14 at the outlet end of the body and seals off the liquid flowing from the inner chamber 8 at the outlet end of the body to the inner chamber 12 at the inlet end of the body, and the valve is closed.

5. Specific instructions: When the liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end or when the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, close the two-way valve IV36 and open the two-way valve V37 , the fluid can flow in both directions; open the two-way valve IV36, close the two-way valve V37, the valve can be closed in both directions. Therefore, the valve has the function that the liquid can pass through the valve in both directions and be blocked in both directions.

Example 16

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve float valve, the inner cavity 7 of the piston is connected to the inner cavity 12 of the body through the pipeline I15 and the two-way valve I19 at the inlet end, and the inner cavity 7 of the piston passes through the two-way valve II20 of the outlet end. , The pipeline I15 is connected to the float valve 23, and the inner cavity flange 24 of the body outlet is connected to the pipeline II25 to the liquid pool 26, as shown in Figure 32.

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes and valves under the condition of following the principles of the present invention, as shown in FIG. 32 .

working principle:

The liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, open the inlet two-way valve I19 and the outlet two-way valve II20, and set the opening of the inlet two-way valve I19 to be smaller than the outlet two-way valve II20 The opening of the body inlet end cavity 12 enters the piston inner cavity 7 through the pipeline I15 and the inlet two-way valve I19, and then enters the liquid pool 26 through the outlet two-way valve II20, the pipeline I15 and the float valve 23. In the air, the piston 6 will not be pressurized at this time, and the extending end surface 13 below the piston leaves the inner cavity stop 14 of the body outlet end under the push of the liquid in the inner cavity 12 of the body inlet end, and the liquid in the inner cavity 12 of the body inlet end passes through The inner cavity stop 14 of the body outlet end enters the inner cavity 8 of the body outlet end, and enters the liquid pool 26 through the pipeline II 25 connected to the inner cavity flange 24 of the body outlet end; when the liquid in the liquid pool 26 rises to the float valve 23, the The ball valve 23 is closed, and the liquid in the inner cavity 12 of the inlet end enters into the inner cavity 7 of the piston through the inlet two-way valve I19 and the pipeline I15, and then cannot enter the liquid pool through the outlet two-way valve II20, the pipeline I15 and the float valve 23. In the air of 26, because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the inner cavity stop 14 at the outlet end of the body, the piston 6 moves downward under pressure, and the extended end face 13 below the piston is connected to the body after the piston 6 moves downward. The mouth 14 of the inner cavity of the outlet end fits and seals the liquid flowing from the inner cavity 12 of the inlet end of the body to the inner cavity 8 of the outlet end of the body, and the valve is closed.

Example 17

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve restrictor valve and check valve, the piston inner cavity 7 is connected to an outlet of the three-way pilot valve I27 through the check valve 18 and the pipeline I15. The other outlet is connected to the liquid inlet 28 of the pump 35 through the pipeline I15. The inlet of the three-way pilot valve I27 is connected to the inner cavity 12 of the body through the pipeline I15 and the inlet two-way valve I19. There is a handwheel on the three-way pilot valve I27. 29. The inner cavity 7 of the piston is connected to the inner cavity 8 at the outlet end of the body through the pipeline I15 and the outlet two-way valve II20, as shown in 33.

In this embodiment, the three-way pilot valve I27 is a handwheel three-way pilot valve.

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes, valves, and pilot valves under the condition of following the principles of the present invention, as shown in FIG. 33 .

working principle:

1. Start the pump 35, the liquid flows from the body inlet cavity 12 to the body outlet cavity 8, open the inlet two-way valve I19 and the outlet two-way valve II20, and set the opening of the inlet two-way valve I19 to less than The opening degree of the two-way valve II20 at the outlet end. At this time, the piston 6 will not be pressurized, and the extending end surface 13 below the piston is pushed by the liquid in the inner cavity 12 of the body inlet end to leave the inner cavity stop 14 of the body outlet end, and the body inlet end The liquid in the inner cavity 12 enters into the inner cavity 8 of the body outlet end through the inner cavity stop 14 of the body outlet end, and the valve is opened; adjusting the handwheel 29 can make the liquid in the inlet end 28 of the pump 35 enter the three-way pilot valve through the pipeline I15 The flow rate of the liquid I27 entering the piston cavity 7 through the pipeline I15 and the check valve 18 ensures that the pressure of the cavity 8 at the outlet end of the valve body is at a set value; when the flow rate of the liquid in the inlet end 28 of the pump 35 changes, the three The induction die in the conduction valve I27 will control the size of the liquid entering the piston cavity 7 through the pipeline I15 and the check valve 18, so that the opening of the piston 6 will change accordingly, thereby ensuring that the body outlet end cavity 8 The pressure in the pump 35 will not change with the change of the liquid flow in the inlet 28 of the pump 35, so as to achieve the purpose of restricting the flow.

2. Turn off the pump 35, the liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, because the check valve 18 does not return to the inner cavity 7 of the piston, the liquid in the inner cavity 7 of the piston passes through the check valve 18 and the pipeline I15. , the three-way pilot valve I27, the two-way valve I19 at the inlet end will not flow to the inner cavity 12 of the inlet end of the body, and will not flow to the inlet end 28 of the pump 35 through the pipeline I15, and the liquid in the inner cavity 8 of the body outlet end will pass through the two-way valve at the outlet end. II20 enters the piston cavity 7 through the pipeline I15. When the liquid pressure in the piston cavity 7 is the same as the liquid pressure in the body outlet cavity 8, the piston 6 moves downward under the action of its own weight, and the end surface 13 extends below the piston. After the piston 6 moves downward, it is matched with the stop 14 of the cavity at the outlet end of the body to seal off the liquid flowing from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, and the valve is closed to achieve the purpose of non-return.

Example 18

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve is a pressure reducing and regulating valve, the inner cavity 7 of the piston is connected to an inlet of the two-way pilot valve 30 through the pipeline I15, and the outlet of the two-way pilot valve 30 passes through the outlet two-way valve. II20. Pipe I15 is connected to the inner cavity 8 of the outlet end, and the inner cavity 7 of the piston is connected to the inner cavity 12 of the body through the pipe I15 and the inlet two-way valve I19. There is a screw 31 on the top of the two-way pilot valve 30, as shown in Figure 34. Show.

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes, valves, and pilot valves under the condition of following the principles of the present invention, as shown in FIG. 34 .

working principle:

The liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, open the inlet two-way valve I19 and the outlet two-way valve II20, and set the opening of the inlet two-way valve I19 to be smaller than the outlet two-way valve II20 At this time, the piston 6 will not be pressurized, and the extending end face 13 below the piston leaves the inner cavity 14 of the body outlet end under the push of the liquid in the inner cavity 12 of the body inlet end, and the liquid in the inner cavity 12 of the body inlet end Entering into the inner cavity 8 of the body outlet end through the inner cavity stop 14 of the body outlet end, the valve is opened; mobilizing the screw 31 on the two-way pilot valve 30 can make the liquid in the inner cavity 7 of the piston enter the body outlet through the outlet end two-way valve II20 The flow rate of the inner cavity 8 of the end is set at a value, so that the liquid pressure in the inner cavity 8 of the body outlet is fixed at a set value; when the liquid pressure in the inner cavity 8 of the body outlet changes, the flow of The induction die will control the flow rate from the piston inner cavity 7 into the body outlet inner cavity 8, so that the opening of the piston 6 changes with the change of the liquid pressure in the body outlet inner cavity 8 to achieve decompression. purpose of stabilization.

Example 19

The above-mentioned non-diaphragm shaft sleeve spring Z-type liquid control valve pressure relief valve, the inner cavity 7 of the piston is connected to one outlet of the three-way pilot valve II32 through the pipeline I15, and the other outlet of the three-way pilot valve II32 is passed through the outlet two-way valve. II20. Pipe I15 is connected to the inner cavity 8 of the outlet end of the body, the inner cavity 12 of the body inlet end is connected to the inlet of the three-way pilot valve II32 through the inlet two-way valve I19, and the pipeline I15 is connected to the inlet of the three-way pilot valve II32, and the inner cavity 7 of the piston is connected through the two-way valve III33 and the pipeline I15. There is a screw 31 on the top of the three-way pilot valve II32 in the inner cavity 8 of the body outlet, as shown in FIG. 35 .

Specific description: In this embodiment, any one of the structures in the present invention can be used to assemble pipes, valves, and pilot valves under the condition of following the principles of the present invention, as shown in FIG. 35 .

working principle:

1. The liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, open the inlet two-way valve I19, the outlet two-way valve II20, and the two-way valve III33; the liquid in the inner cavity 8 of the body outlet end passes through the pipeline I15 , The two-way valve III33 enters the piston cavity 7, and enters the three-way pilot valve II32 through the pipeline I15 and the outlet two-way valve II20; adjust the top screw 31 of the three-way pilot valve II32 to a certain position, when the body outlet end cavity 8 When the pressure rises to the set value, the liquid pressure in the inner cavity 8 of the body outlet will enter the three-way pilot valve II32 through the pipe I15 and the two-way valve II20 of the outlet end. The pipeline of the valve I19 is connected to the pipeline of the inner cavity 7 of the piston and enters the pipeline of the three-way pilot valve II32 through the pipeline I15, and the liquid in the inner cavity 7 of the piston is leaked into the inner cavity 12 of the body inlet end, and the inner cavity 8 of the body outlet end is discharged. The amount of liquid entering the piston cavity 7 from the pipeline I15 and the two-way valve III33 is set to be less than the amount of liquid leaking from the piston cavity 7 to the body inlet cavity 12, because the area of the outer ring of the piston 6 is larger than the The inner ring area of the inner cavity stop 14 at the body outlet end, the piston 6 is pushed up by the liquid in the inner cavity 8 of the body outlet end, and the extending end surface 13 under the piston leaves the body outlet end cavity stop when the piston 6 moves upward. 14. The liquid in the inner cavity 8 of the body outlet end flows into the inner cavity 12 of the body inlet end through the inner cavity stop 14 of the body outlet end, and the valve is opened to achieve the purpose of pressure relief.

2. When the liquid pressure in the inner cavity 8 at the outlet end of the valve body is lower than the set value, the liquid pressure in the inner cavity 8 at the outlet end of the valve body enters the liquid pressure of the three-way pilot valve II32 through the pipeline I15 and the outlet two-way valve II20. The three-way pilot valve II32 cannot be opened to connect the pipeline I15, the inlet two-way valve I19, and the pipeline connecting the piston cavity 7 into the three-way pilot valve II32 through the pipeline I15, so the liquid in the piston cavity 7 cannot be leaked. into the inner cavity 12 of the body inlet end, but the liquid in the inner cavity 8 of the body outlet end can enter into the inner cavity 7 of the piston through the pipeline I15 and the two-way valve III33. When the liquid pressure in the inner cavity 8 is the same, the piston 6 moves downward under the action of its own weight. After the piston 6 moves downward, the extended end surface 13 of the piston 6 matches with the inner cavity stop 14 at the outlet end of the valve body to seal off the inner cavity of the outlet end of the body. 8 The liquid flowing to the inner cavity 12 of the body inlet end, the valve is closed, and the valve no longer releases pressure.

Claims

A Z-type liquid control valve without a diaphragm shaft sleeve spring, comprising a cover (1), a body (3), a sealing ring groove (4), a sealing ring (5), a piston (6), and an extended end surface below the piston (13), and the body outlet end cavity stop (14); it is characterized in that: the setting method of the sealing ring groove (4) adopts one of the following seven forms: set on the cover (1), set on the on the body (3), on the cover (1) and on the body (3) at the same time, on the seat (2) between the cover (1) and the body (3), and on the cover (1) and the body (3) at the same time On the seat (2), it is arranged on the seat (2) and the body (3) at the same time, and it is arranged on the cover (1), the seat (2) and the body (3) at the same time;

The sealing ring (5) is installed in the sealing ring groove (4), the piston (6) is placed in the sealing ring (5), between the cover (1) and the body (3), or the The cover (1), the seat (2) and the body (3) are sealed as a whole, and the piston (6) and the extending end surface (13) below the piston form a whole; the cover (1) has a piston in it The inner cavity (7), the body (3) has a body entry end cavity (12) and a body exit end cavity (8); between the body entry end cavity (12) and the body exit end cavity (8) There is an inner cavity stop (14) at the body outlet end between them;

The outer ring (9) of the sealing ring is sealed with the groove (4) of the sealing ring, and the inner ring (10) of the sealing ring and the outer ring (11) of the piston are statically and slidingly sealed, so that the inner cavity (7) of the piston is sealed. It is sealed with the inner cavity (8) of the body outlet end;

The lower extension end surface (13) of the piston fits and seals with the body outlet end inner cavity stopper (14) after the piston (6) moves, so that there is a gap between the body inlet end inner cavity (12) and the body outlet end inner cavity (8). seal.
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 1, characterized in that: the cross section of the sealing ring groove (4) is circular, and the structural shape of the longitudinal section is concave (49) , the cross section of the sealing ring (5) is circular, the shape of the longitudinal section is V shape (50), the cross section of the piston (6) is circular, and the shape of the longitudinal section is U shape (56), The cross section of the inner cavity stop (14) of the outlet end is circular.
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 2, characterized in that: the inner diameter of the inner cavity stop (14) of the outlet end is smaller than the outer diameter of the piston (6), and the sealing The ring plane of the ring groove (4) is parallel to the ring plane of the inner cavity stop (14) of the body outlet end, and the position of the center line is coincident, and the position of the center line of the ring plane of the sealing ring groove (4) is the same as that of the ring plane. The position of the center line of the piston (6) placed in the sealing ring (5) coincides, and when the piston (6) is placed in the sealing ring (5), the piston outer ring (11) and the inner ring of the sealing ring (10) Contact, the direction of the piston inner diameter port (51) of the piston (6) placed in the sealing ring (5) is toward the piston inner cavity (7) or the opposite direction toward the piston inner cavity (7).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 2, characterized in that: the piston (6) and the extending end surface (13) below the piston are vertically connected and fixed as a whole, and the piston (6) is vertically connected and fixed as a whole. The lower extending end surface (13) has a sealing surface I (38). The outer ring (9) of the sealing ring is sealed with the sealing ring groove (4), which means that the outer ring (9) of the sealing ring has elastic retention and sealing ring groove. The groove (4) is in contact with the seal, and the inner ring (10) of the sealing ring is statically sealed and slidingly sealed with the piston outer ring (11), which means that the inner ring (10) of the sealing ring has elasticity to keep it in contact with the piston outer ring (11). Static sealing and sliding sealing, the outer ring (9) of the sealing ring and the inner ring (10) of the sealing ring have elastic retention, once the direction of the expansion port (48) of the sealing ring is pressurized by the liquid, the sealing ring (5) ) will expand and contract with the increase and decrease of hydraulic pressure. If the expansion port (48) of the seal ring is pressurized by hydraulic pressure in the opposite direction, the seal ring (5) will not expand and expand with the increase and decrease of hydraulic pressure, and the seal The ring (5) is installed in the groove (4) of the sealing ring, and the direction of the expansion port (48) of the sealing ring is toward the piston inner cavity (7) or the opposite direction to the piston inner cavity (7).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 1, characterized in that: the number of the sealing ring grooves (4) is one or more, and the number of the installed sealing rings (5) The number of the grooves (4) of the sealing ring is the same and the model is matched. The cover (1) and the body (3) are sealed and connected by fasteners to form a whole, and the sealing is sealed by a sealing strip (52). .
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 1, characterized in that: the sealing ring groove (4) is processed on the top of the I-type sealing ring groove seat (46), and the sealing ring groove (4) is processed to seal The number of ring grooves (4) is one or more, the number of installed seal rings (5) is the same as the number of the seal ring grooves (4) to be processed, and the model matches. The type I seal ring groove seat (46 ) and the body (3) are sealed and connected by fasteners to form a whole, the sealing is sealed by a sealing strip (52), and the sealed connection between the cover (1) and the body (3) is fixed by fasteners It is connected as a whole, and the sealing is sealed by a sealing strip (52).
The Z-type liquid control valve without a diaphragm shaft sleeve spring according to claim 1, characterized in that a type II sealing ring groove seat (47) is added between the cover (1) and the body (3), so that the The sealing ring groove (4) is machined on the top of the type II sealing ring groove seat (47). The sealing ring grooves (4) have the same number and matching models, and the sealing connection between the cover (1), the type II sealing ring groove seat (47), and the body (3) is fixed and connected as a whole by fasteners. The seal is sealed with a sealing strip (52).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 1, characterized in that:

There is a cut-off opening (40) above or below the sealing ring groove (4), and the ring plane of the cut-off opening (40) is parallel to the ring plane of the sealing ring groove (4). The positions of the center lines are coincident, and the upper and outward extending portion (41) of the piston (6) or the lower end surface (42) of the piston (6) fits and seals with the cut-off port (40) after the piston (6) moves down. At the same time, the lower extending end surface (13) of the piston is in a fit and sealing manner with the inner cavity stopper (14) of the body outlet end, and the upper outward extending part (41) of the piston (6) has a sealing surface II (53). The lower end surface (42) of the piston (6) has a sealing surface III (54), the sealing connection between the cover (1) and the body (3) is fixed and connected as a whole by fasteners, and the sealing adopts a sealing strip (52). )seal.
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 1, characterized in that:

There is a cut-off port (40) on the seat (2), the ring plane of the cut-off port (40) and the ring plane of the sealing ring groove (4) are parallel to each other, and the centerline position coincides, and the piston The upper and outwardly extending portion (41) of (6) or the lower end surface (42) of the piston (6) is matched and sealed with the cut-off port (40) after the piston (6) moves down, and at the same time the lower end surface (42) of the lower extension of the piston ( 13) Fitting and sealing with the inner cavity stop (14) of the body outlet, the upper and outward extending part (41) of the piston (6) has a sealing surface II (53), and the lower end surface ( 42) There is a sealing surface III (54), the sealing connection between the cover (1), the seat (2), and the body (3) is fixed and connected as a whole by fasteners, and the sealing is sealed by a sealing strip (52).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 1, characterized in that:

A shaft (44) extending into the inner cavity (7) of the piston is installed on the cover (1), the contact between the shaft (44) and the cover (1) is sealed, and the shaft (44) Axially movable relative to the cover (1).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 1, characterized in that:

The inner cavity (7) of the piston and the inner cavity (12) of the body entry end, and the inner cavity (7) of the piston and the inner cavity (8) of the body outlet end are connected via pipes with valves or directly connected by pipes.
The Z-type liquid control valve without diaphragm shaft sleeve spring according to claim 11, characterized in that:

An electric actuator (43) is installed on the valve, and the electric actuator (43) performs valve switching.
The Z-type liquid control valve without diaphragm shaft sleeve spring according to any one of claims 1-12, characterized in that:

The inner cavity (7) of the piston is connected to the three-way valve (17) through the pipeline I (15), and an outlet of the three-way valve (17) is connected to the body through the pipeline I (15) and/or the check valve (18). The inner cavity (12) of the inlet end and the other outlet of the three-way valve (17) are connected to the inner cavity (8) of the outlet end of the body through the pipeline I (15).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to any one of claims 1-12, characterized in that:

The inner cavity (7) of the piston is connected to the inner cavity (12) of the body entry end through a pipeline I (15) and an inlet two-way valve I (19), and the inner cavity (7) of the piston passes through a pipeline I (15) , Outlet two-way valve II (20) connecting body outlet cavity (8); or

The inner cavity (7) of the piston is connected to the inner cavity (12) at the inlet end of the body through the pipeline I (15), the two-way valve I (19) at the inlet end, and the semi-closed check valve (34). ) through the pipeline I (15), the two-way valve II (20) at the outlet, and the semi-closed check valve (34) to connect the inner cavity (8) at the outlet of the body.
The Z-type liquid control valve without diaphragm shaft sleeve spring according to any one of claims 1-12, characterized in that:

The piston inner cavity (7) is connected to a three-way I (21) through a two-way valve IV (36), and two outlets of the three-way I (21) are installed with a check valve (18), one of which is a check valve. The outlet of the valve (18) is connected to the inner cavity (12) of the body through the pipeline I (15), and the outlet of the other check valve (18) is connected to the inner cavity (8) of the outlet end of the body through the pipeline I (15);

The piston inner cavity (7) is connected to a three-way II (22) through a two-way valve V (37), and a check valve (18) is installed at the two outlets of the three-way II (22), one of which is a check valve. The outlet of (18) is connected to the inner cavity (12) of the valve body through the pipeline I (15), and the outlet of the other check valve (18) is connected to the inner cavity (8) of the outlet end of the body through the pipeline I (15).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to any one of claims 10-12, characterized in that:

The inner cavity (7) of the piston is connected to the inner cavity (12) of the body through the pipeline I (15) and the two-way valve I (19) at the input end, and the inner cavity (7) of the piston passes through the two-way valve II ( 20) The pipeline I (15) is connected to the floating ball valve (23), and the inner cavity flange (24) of the body outlet is connected to the pipeline II (25) into the liquid pool (26).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to any one of claims 1-12, characterized in that:

The piston inner cavity (7) is connected to one outlet of the three-way pilot valve I (27) through the check valve (18) and the pipeline I (15), and the other outlet of the three-way pilot valve I (27) is through the pipeline. I(15) is connected to the liquid inlet (28) of the pump (35), and the inlet of the three-way pilot valve I(27) is connected to the inlet of the body through the pipeline I(15) and the inlet two-way valve I(19). A cavity (12), the piston inner cavity (7) is connected to the outlet inner cavity (8) of the body through a pipeline I (15) and an outlet two-way valve II (20).
The Z-type liquid control valve without diaphragm shaft sleeve spring according to any one of claims 1-12, characterized in that:

The inner cavity (7) of the piston is connected to an inlet of the two-way pilot valve (30) through the pipeline I (15), and the outlet of the two-way pilot valve (30) is connected to the outlet two-way valve II (20), the pipeline I (15) The inner cavity (8) at the outlet end of the connecting body, the inner cavity (7) of the piston is connected to the inner cavity (12) at the inlet end of the body through the pipeline I (15) and the two-way valve I (19) at the inlet end, and the two There is a screw (31) on the top of the on-off valve (30); or

The inner cavity (7) of the piston is connected to one outlet of the three-way pilot valve II (32) through the pipeline I (15), and the other outlet of the three-way pilot valve II (32) is passed through the outlet two-way valve II (20). ), the pipe I (15) is connected to the inner cavity (8) of the outlet end of the body, and the inner cavity (12) of the inlet end of the body is connected to the three-way pilot valve II ( 32), the inner cavity (7) of the piston is connected to the inner cavity (8) of the outlet end of the body through the two-way valve III (33) and the pipe I (15), and the top of the three-way pilot valve II (32) has a screw (31).