WO2021068863A1

WO2021068863A1 - Self-balancing pipeline apparatus

Info

Publication number: WO2021068863A1
Application number: PCT/CN2020/119842
Authority: WO
Inventors: 蒋晨; 肖小勇
Original assignee: 浙江鑫帆暖通智控股份有限公司
Priority date: 2019-10-10
Filing date: 2020-10-07
Publication date: 2021-04-15
Also published as: CN210623718U

Abstract

A self-balancing pipeline apparatus, comprising a water intake pipe (1) and a water discharge pipe (2). A water discharge end of the water discharge pipe (2) is connected to a dynamic differential pressure balance valve (3); the dynamic differential pressure balance valve (3) comprises a differential pressure valve body (31), a valve rod (32), a diaphragm (33), a spring (34), a lower cover (35), and an upper cover (36); the upper cover (36) is threadedly connected to a cylindrical valve core (8), and the valve core (8) sleeved by a hand wheel (9); an upper end of the valve rod (32) is threadedly connected to an adjustment sleeve (10); the spring (34) is sleeved outside of the adjustment sleeve (10) and an upper end of the spring (34) abuttingly contacts a flange (101) of the adjustment sleeve (10); a cylindrical connecting sleeve (11) which is circumferentially fixed to the hand wheel (9) is provided in the adjustment sleeve (10), and a limiting screw rod (12) which abuttingly contacts the top end of the valve rod (32) is threadedly connected in the connecting sleeve (11); and a water intake end of the water intake pipe (1) is connected to a water intake balance valve (13), and a pressure guide pipe (7) is in communication with a water intake cavity of the water intake balance valve (13). The described self-balancing pipeline apparatus is convenient to fabricate and has high adjustment precision.

Description

Self-balancing pipeline device

Technical field

The utility model belongs to the technical field of valve manufacturing, and relates to a pipeline device, in particular to a self-balancing pipeline device.

Background technique

After the implementation of household metering in the country, users are implementing independent adjustments for the purpose of energy saving. When the user's valve opening changes cause the flow rate to change, the flow rate of other users will also change, deviating from the flow rate required in the design. As a result, the dynamic hydraulic imbalance of the system is caused. Therefore, the variable flow water system occupies an increasingly important position in the plumbing and HVAC water systems.

The variable flow dynamic hydraulic balance system is generally realized by connecting the dual pipes in parallel at the key points of the system through the dynamic hydraulic balance equipment, and maintains the pressure difference within the design pressure difference range. Therefore, the variable flow dynamic hydraulic balance system can also be called variable flow Differential pressure system. The variable flow differential pressure system includes a differential pressure valve, etc. The differential pressure valve is a self-operated differential pressure balance valve. For example, Chinese Patent Literature discloses a dynamic differential pressure balance valve [application number: 201010286396.2; authorization announcement number: CN101929575B], which It includes a valve body and a valve core. The valve body is provided with a diaphragm. The diaphragm divides the valve body into a control cavity and a water passage cavity adjacent to each other. One end of the valve core is fixedly connected with the diaphragm, and the other end of the valve core is located at the water passage cavity. There is a spring in the control cavity. The two ends of the spring act on the valve body and the diaphragm respectively. The control cavity has a pressure guide port connected with the user's water inlet. Under the action of the spring, the valve core can reduce the degree of valve opening. The spool is composed of a connecting rod and a piston fixedly connected to one end of the connecting rod. The other end of the connecting rod is connected with a diaphragm, and the connecting rod is covered with a return spring.

The above-mentioned dynamic differential pressure balance valve can automatically balance the pressure between the user's water inlet and outlet to ensure the pressure balance between the user's water inlet and outlet, but it adjusts the pressure difference through the axial displacement of the limit rod , The adjustment accuracy is not high enough, and the integral valve body is inconvenient to manufacture. The pressure guide port is connected to the user's water inlet through a capillary tube. The user's water inlet uses a common ball valve to control the flow and water pressure, and the adjustment accuracy is not good.

Summary of the invention

The purpose of the utility model is to provide a self-balancing pipeline device that is convenient to manufacture and has high adjustment accuracy in view of the above-mentioned problems in the prior art.

The purpose of the utility model can be achieved by the following technical solutions: a self-balancing pipeline device, including a water inlet pipe and a water outlet pipe, the outlet end of the water outlet pipe is connected with a dynamic differential pressure balance valve, the dynamic differential pressure balance The valve includes a differential pressure valve body, a valve stem, a diaphragm and a spring, and is characterized in that the dynamic differential pressure balance valve also includes a lower cover and an upper cover, and the lower cover is connected to the top of the differential pressure valve body, so The upper cover and the lower cover are fixedly connected and the diaphragm is pressed between the upper cover and the lower cover. An upper cavity is formed between the upper cover and the diaphragm, and a lower cavity is formed between the lower cover and the diaphragm. The valve stem passes through the diaphragm and the diaphragm is fixedly connected to the valve stem. The lower end of the valve stem passes through the lower cover and extends into the differential pressure valve body. The valve stem is embedded with a sealing ring sealed on the inner wall of the lower cover 1. The lower end of the valve stem has an axially extending blind hole and the lower end of the valve stem is provided with a radially penetrating water hole. The water hole connects the blind hole with the lower cavity, and the upper cover Connected with a pressure guiding tube communicating with the upper cavity, the upper cover is threadedly connected with a cylindrical valve core body, the valve core body is sheathed with a hand wheel, and the spring is sleeved on the valve stem and extends out of the upper cover The upper end of the valve rod and the upper end of the valve stem are threadedly connected with an adjusting sleeve. The spring is sleeved outside the adjusting sleeve and the upper end of the spring abuts against the flange of the adjusting sleeve. The adjusting sleeve is provided with a cylindrical shape and is circumferentially connected to the handwheel. A fixed connecting sleeve, the connecting sleeve is threadedly connected with a limit screw for the top end of the valve stem to resist, the inlet end of the inlet pipe is connected with an inlet balance valve, and the pressure guiding pipe is connected with the inlet The water inlet cavity of the balance valve is connected.

In the above-mentioned self-balancing pipeline device, the hand wheel has a plurality of axially extending limit grooves, the outer wall of the hand wheel has pressure marks on both sides of the limit groove, and the valve core body is threadedly connected with A nut, the nut has an indicator block corresponding to the limiting groove one-to-one and locked in the limiting groove. The hand wheel drives the nut to rotate, and the indicating block points to the pressure mark, so that the pressure value is displayed intuitively, which is more convenient for adjustment.

In the above-mentioned self-balancing piping device, the top end of the valve core body has a limit groove, the hand wheel has a flange embedded in the limit groove, and the connecting sleeve has a circle A convex ring that protrudes radially and abuts against the shoulder of the inner wall of the valve core body, and the connecting sleeve is also embedded with a circlip pressed against the top end of the valve core body. In this way, the hand wheel will not be separated from the valve core body, the connecting sleeve will not move axially, and the adjustment process is stable.

In the above-mentioned self-balancing pipeline device, two sealing rings are provided between the lower cover and the differential pressure valve body, and three sealing rings are provided between the upper cover and the valve core body. The connection The sleeve is embedded with a sealing ring 4 sealed on the valve core body, the lower end of the limit screw is embedded with at least two sealing rings 5 sealed on the inner wall of the connecting sleeve, and the bottom end of the valve stem is threadedly connected with a lock A tight cap, a sealing gasket is compressed between the locking cap and the bottom end of the valve stem, and the locking cap has an axially penetrating through hole. In this way, the sealing performance is good to avoid leakage.

In the above-mentioned self-balancing pipeline device, the valve stem has a radially protruding support ring, and a support block sleeved on the valve stem is provided between the support ring and the diaphragm, and the support block There is a support edge extending radially and supported on the bottom surface of the diaphragm, the valve stem is sleeved with a pressing ring pressed on the top surface of the diaphragm, and the valve stem is threadedly connected with a nut for pressing the pressing ring. In this way, the diaphragm and the valve stem are firmly connected, and the diaphragm works stably without affecting the adjustment accuracy.

In the above-mentioned self-balancing pipeline device, the inlet balance valve includes an inlet valve body, a valve core, a valve core sleeve, a positioning screw, an adjusting screw sleeve and a valve cover, and the valve cover is threadedly connected to On the top of the inlet valve body, the valve cover is axially provided with a valve core sleeve which is limited in the circumferential direction, and the valve core sleeve is threadedly connected with the adjusting screw sleeve through an external thread. The outer wall of the adjusting screw sleeve There is a limit block circumferentially limited on the inner wall of the valve cover, the valve core is rod-shaped and axially passes through the bottom end of the adjusting screw sleeve, the valve core is threadedly connected with the adjusting screw sleeve, and the valve core and the bottom end of the adjusting screw sleeve are connected A sealing gasket is compressed between the valve core sleeve and the positioning screw rod axially penetrates the valve core sleeve and the upper end of the positioning screw rod is threadedly connected with the valve core sleeve. The valve cover sleeve is provided with a circumferential limit of the valve core sleeve. The handwheel sleeve has a number of axially extending grooves, the outer wall of the handwheel sleeve has pressure scales on both sides of the grooves, the valve cover is threaded with an indicator cap, and the The indicating cap has one-to-one correspondence with the card slot and a raised block located in the card slot.

In the above-mentioned self-balancing pipeline device, the bottom of the valve core is spherical. This reduces the water flow resistance and makes the water flow smoothly.

In the above-mentioned self-balancing piping device, the valve core sleeve has a circle of bosses that protrude radially and abut against the steps on the inner wall of the valve cover, and the valve core sleeve is embedded and pressed against The retaining ring at the top of the bonnet. In this way, the axial limit effect of the valve core sleeve is good, and the adjustment accuracy is ensured.

In the above-mentioned self-balancing pipeline device, a sealing ring 6 is provided between the valve cover and the inlet valve body, and at least two sealing rings are embedded in the lower end of the positioning screw rod and sealed to the inner wall of the valve core sleeve. Sealing ring seven, the valve core sleeve is embedded with a sealing ring eight which is located between the boss and the clamp ring and is sealed to the inner wall of the valve cover. In this way, the sealing performance is good, and the adjustment accuracy will not be affected by leakage.

In the above-mentioned self-balancing pipeline device, the inlet end of the inlet pipe and the outlet end of the outlet pipe are both connected with pressure gauges. In this way, the water pressure at the water inlet and outlet ends can be visually displayed, which is convenient for adjustment.

Compared with the prior art, the self-balancing pipeline device is convenient to manufacture, quick to assemble, and the dynamic pressure balance valve and the inlet water balance valve have high adjustment accuracy, can effectively compensate the pressure difference accuracy, convenient adjustment, good working stability, and use long life.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the self-balancing pipeline device.

Fig. 2 is a perspective view of the structure of the inlet balance valve in the self-balancing pipeline device.

Fig. 3 is a structural cross-sectional view of the inlet balance valve in the self-balancing pipeline device.

Fig. 4 is a perspective view of the structure of the dynamic pressure difference balancing valve in the self-balancing pipeline device.

Fig. 5 is a structural cross-sectional view of the dynamic pressure difference balancing valve in the self-balancing pipeline device.

In the figure, 1. Water inlet pipe; 2. Water outlet pipe; 3. Dynamic differential pressure balance valve; 31, differential pressure valve body; 32, valve stem; 321, support ring; 33, diaphragm; 34, spring; 35, lower Cover; 36. Upper cover; 37. Blind hole; 38. Water hole; 4. Upper cavity; 5. Lower cavity; 6. Seal ring one; 7. Pressure guiding tube; 8. Valve core body; 9. Handwheel 91. Flanging; 10. Adjusting sleeve; 101. Flanging; 11. Connecting sleeve; 111. Convex ring; 12. Limit screw; 13. Inlet balance valve; 131. Inlet valve body; 132. Valve Core; 133, valve core sleeve; 134, positioning screw; 135, adjusting screw sleeve; 136, valve cover; 137, limit block; 138, sealing gasket; 139, handwheel sleeve; 140, pressure scale; 141, Indicating cap; 142, raised block; 143, boss; 14, pressure mark; 15, nut; 151, indicating block; 16, circlip; 17, sealing ring two; 18, sealing ring three; 19, sealing ring Four; 20. Seal ring five; 21. Locking cap; 211. Through hole; 22. Seal gasket; 23. Support block; 231. Support edge; 24. Press ring; 25. Nut; 26. Clamp ring; 27. Sealing ring six; 28. Sealing ring seven; 29. Sealing ring eight; 30. Pressure gauge.

Detailed ways

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solution of the present utility model, but the present utility model is not limited to these embodiments.

As shown in Figure 1, Figure 4 and Figure 5, the self-balancing pipeline device includes a water inlet pipe 1 and a water outlet pipe 2. The outlet end of the water outlet pipe 2 is connected with a dynamic differential pressure balance valve 3, and the dynamic differential pressure balance valve 3 includes a differential pressure The valve body 31, the valve stem 32, the diaphragm 33 and the spring 34. The dynamic pressure balance valve 3 also includes a lower cover 35 and an upper cover 36. The lower cover 35 is connected to the top of the differential pressure valve body 31. In this embodiment, the lower cover The outer wall of 35 has an annular groove, the flange of a lock cap is embedded in the annular groove, and the lock cap is threadedly connected with the differential pressure valve body 31; the upper cover 36 is fixedly connected with the lower cover 35 and the diaphragm 33 is pressed against the upper cover 36 and the lower cover. The upper cavity 4 is formed between the cover 35, the upper cover 36 and the diaphragm 33, and the lower cavity 5 is formed between the lower cover 35 and the diaphragm 33. The valve stem 32 passes through the diaphragm 33 and the diaphragm 33 is fixedly connected to the valve stem. 32, the lower end of the valve stem 32 passes through the lower cover 35 and extends into the differential pressure valve body 31. The valve stem 32 is embedded with a sealing ring 6 sealed on the inner wall of the lower cover 35. The lower end of the valve stem 32 has an axial extension. The lower end of the valve stem 32 is provided with a radially penetrating water hole 38, which connects the blind hole 37 and the lower cavity 5, and the upper cover 36 is connected with a pressure guiding tube connected to the upper cavity 4 7. The upper cover 36 is threadedly connected with a cylindrical valve core body 8, the valve core body 8 is sheathed with a handwheel 9, a spring 34 is sleeved on the valve stem 32 to extend from the upper end of the upper cover 36, and the upper end of the valve stem 32 is threadedly connected with an adjusting sleeve 10. The spring 34 is sleeved outside the adjusting sleeve 10 and the upper end of the spring 34 abuts against the flange 101 of the adjusting sleeve 10. The adjusting sleeve 10 is provided with a cylindrical connecting sleeve 11 that is circumferentially fixed to the hand wheel 9. The connecting sleeve 11 The top section is square, the hand wheel 9 has a square hole fitted to the top of the connecting sleeve 11, the connecting sleeve 11 is threadedly connected with a limit screw 12 for the top end of the valve stem 32 to resist, and the water inlet end of the water inlet pipe 1 is connected with water inlet The balance valve 13 and the pressure guiding pipe 7 communicate with the inlet cavity of the inlet balance valve 13.

When the self-balancing piping device is used, the water pressure at the inlet end of the water inlet pipe 1 is equal to the water pressure in the inlet chamber of the inlet balance valve 13. When the water pressure in the inlet chamber of the inlet balance valve 13 increases, the excess water The pressure is transmitted to the upper chamber 4 of the dynamic differential pressure balance valve 3 through the pressure guiding tube 7, and the water pressure acts on the diaphragm 33 so that the diaphragm 33 drives the valve stem 32 to move downwards axially, so that the lower end of the valve stem 32 and the differential pressure valve The degree of opening between the bodies 31 is reduced to ensure that the water flow rate will not increase. When the water pressure of the inlet chamber of the inlet balance valve 13 decreases, the water pressure of the inlet chamber of the differential pressure valve body 31 enters the blind hole 37 and Flow through the water hole 38 to reach the lower cavity 5, the water pressure of the lower cavity 5 increases so that the diaphragm 33 overcomes the elastic force of the spring 34 to drive the valve stem 32 to move upwards axially, so that the lower end of the valve stem 32 and the differential pressure valve body 31 The degree of opening between the room is increased to ensure that the water flow rate will not decrease, so that within a certain pressure difference range, the passing flow rate is maintained at a constant value, so that the water pressure and flow rate of the inlet pipe 1 and the outlet pipe 2 are balanced and stable. ; The dynamic pressure balance valve 3 in the self-balancing pipeline device through the upper cover 36, the lower cover 35 and the pressure difference valve body 31 is set, making it easy to manufacture, quick to assemble, and turning the handwheel 9 drives the connecting sleeve 11 to rotate, the connecting sleeve 11 drives the axial displacement of the limit screw 12, thereby changing the position where the top end of the valve stem 32 abuts the limit screw 12, that is, changing the axial position of the valve stem 32 and the adjusting sleeve 10, and changing the elastic force of the spring 34, so that The dynamic pressure balance valve 3 manually adjusts the range of 50-300mbar according to the demand to compensate the pressure difference accuracy, and the adjustment accuracy is high.

In further detail, in order to visualize the pressure value and facilitate adjustment, the handwheel 9 has four axially extended and circumferentially distributed limit grooves. The outer wall of the handwheel 9 has pressure marks 14 on both sides of the limit groove, and the valve core body 8 has threads. A nut 15 is connected. The nut 15 has an indicator block 151 that corresponds to the limit groove one by one and is stuck in the limit groove; in order to stabilize the adjustment process, the top of the valve core body 8 has a circle of limit grooves, and the hand wheel 9 The connecting sleeve 11 has a flange 91 embedded in the limiting groove. The connecting sleeve 11 has a ring 111 protruding radially and abutting against the shoulder on the inner wall of the valve core body 8. The connecting sleeve 11 is also embedded and pressed against the valve core. The circlip 16 at the top of the body 8; in order to have good sealing performance, a sealing ring 17 is provided between the lower cover 35 and the differential pressure valve body 31, and a sealing ring 18 is provided between the upper cover 36 and the valve core body 8, and the connecting sleeve 11 is embedded with a sealing ring 419 sealed to the valve core body 8, the lower end of the limit screw 12 is embedded with two sealing rings 520 sealed to the inner wall of the connecting sleeve 11, and the bottom end of the valve stem 32 is screwed with a lock The cap 21, the locking cap 21 and the bottom end of the valve stem 32 are compressed with a gasket 22, the locking cap 21 has an axial through hole 211; in order to connect the diaphragm 33 and the valve stem 32 firmly, the valve stem 32 has A ring of radially protruding support ring 321, between the support ring 321 and the diaphragm 33 is provided a support block 23 sleeved on the valve stem 32, the support block 23 has a support edge extending radially and supported on the bottom surface of the diaphragm 33 231, the valve stem 32 is sleeved with a pressing ring 24 pressed on the top surface of the diaphragm 33, and the valve stem 32 is threadedly connected with a nut 25 for pressing the pressing ring 24.

As shown in Figures 2 and 3, the inlet balance valve 13 includes an inlet valve body 131, a valve core 132, a valve core sleeve 133, a positioning screw 134, an adjusting screw sleeve 135 and a valve cover 136. The valve cover 136 is threadedly connected to On the top of the inlet valve body 131, the valve cover 136 is axially penetrated with a valve core sleeve 133 which is limited in its circumferential direction. The valve core sleeve 133 is threadedly connected with the adjusting screw sleeve 135 through external threads. The outer wall of the adjusting screw sleeve 135 has a circumferential direction. The limit block 137 is limited to the inner wall of the valve cover 136. The outer wall of the limit block 137 is a regular hexagon. The inner wall of the valve cover 136 is an inner hexagon hole that fits the limit block 137. The valve core 132 is in the shape of a rod and passes through the adjustment axis. The bottom end of the screw sleeve 135, the valve core 132 is threadedly connected with the adjusting screw sleeve 135, and a sealing gasket 138 is compressed between the valve core 132 and the bottom end of the adjusting screw sleeve 135, and the positioning screw 134 axially penetrates the valve core sleeve 133 The upper end of the positioning screw 134 is threadedly connected with the valve core sleeve 133. The valve cover 136 is provided with a handwheel sleeve 139 which is circumferentially limited with the valve core sleeve 133. The top section of the valve core sleeve 133 is square. The handwheel sleeve 139 has Fitted to the square hole at the top of the valve core sleeve 133, the handwheel sleeve 139 has four axially extending and circumferentially uniformly distributed grooves. The outer wall of the handwheel sleeve 139 has pressure scales 140 on both sides of the groove. The valve cover 136 is threadedly connected with Indicating cap 141, indicating cap 141 has one-to-one correspondence with the card slot and a protrusion 142 located in the card slot.

When adjusting, first unscrew the positioning screw 134 to move the positioning screw 134 to the top side of the valve cover 136, and then through the rotation of the handwheel sleeve 139, the valve core sleeve 133 is driven to rotate, and the valve core sleeve 133 drives the adjustment screw sleeve 135 shaft The adjusting screw sleeve 135 drives the axial displacement of the valve core 132, thereby changing the opening degree of the sealing gasket 138 and the inlet valve body 131, thereby adjusting the water pressure and flow rate. In the above process, the handwheel sleeve 139 drives the indicating cap 141 Turning, the raised block 142 points to the pressure scale 140, which visually displays the pressure value for easy adjustment. After adjustment, the positioning screw 134 is rotated so that the bottom end of the positioning screw 134 abuts against the top of the valve core 132, thus avoiding the impact of water flow. The spool 132 is displaced to ensure the accuracy of adjustment.

For smooth water intake, the bottom of the valve core 132 is spherical, and the bottom of the valve core 132 has a hexagonal hole to facilitate the use of an Allen wrench to rotate the valve core 132; for the valve core sleeve 133 to work stably, the valve core sleeve 133 has a circle of radial protrusions And against the boss 143 on the step on the inner wall of the valve cover 136, the valve core sleeve 133 is embedded with a clamp ring 26 pressed against the top of the valve cover 136; for good sealing, the valve cover 136 and the inlet valve body 131 There is a sealing ring 27 between the two, the lower end of the positioning screw 134 is embedded with two sealing rings 728 sealed on the inner wall of the valve core sleeve 133, and the valve core sleeve 133 is embedded between the boss 143 and the clamp ring 26. The sealing ring 29 is sealed on the inner wall of the valve cover 136; in order to visually display the water pressure at the water inlet and outlet ends for easy adjustment, the water inlet end of the water inlet pipe 1 and the water outlet end of the water outlet pipe 2 are both connected with a pressure gauge 30.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art. The specific embodiments described in this article are merely examples to illustrate the spirit of the present utility model. Those skilled in the technical field of the present utility model can make various modifications or additions to the specific embodiments described or substitute similar methods, but they will not deviate from the spirit of the present utility model or surpass the appended claims. The defined range.

Claims

A self-balancing pipeline device includes a water inlet pipe (1) and a water outlet pipe (2). The outlet end of the water outlet pipe (2) is connected with a dynamic pressure difference balancing valve (3), and the dynamic pressure difference balancing valve (3) It includes a differential pressure valve body (31), a valve stem (32), a diaphragm (33) and a spring (34), characterized in that the dynamic differential pressure balance valve (3) also includes a lower cover (35) ) And the upper cover (36), the lower cover (35) is connected to the top of the differential pressure valve body (31), the upper cover (36) and the lower cover (35) are fixedly connected and the diaphragm (33) ) Is pressed between the upper cover (36) and the lower cover (35), the upper cavity (4) is formed between the upper cover (36) and the diaphragm (33), the lower cover (35) and the diaphragm ( A lower cavity (5) is formed between 33). The valve stem (32) passes through the diaphragm (33) and the diaphragm (33) is fixedly connected to the valve stem (32). The valve stem (32) The lower end of the valve passes through the lower cover (35) and extends into the differential pressure valve body (31). The valve stem (32) is embedded with a sealing ring (6) sealed on the inner wall of the lower cover (35). The valve stem The lower end of (32) has an axially extending blind hole (37) and the lower end of the valve stem (32) is provided with a radially penetrating water hole (38). The water hole (38) makes the blind hole (37) Connected with the lower cavity (5), the upper cover (36) is connected with a pressure guiding tube (7) connected with the upper cavity (4), and the upper cover (36) is threadedly connected with a cylindrical valve The core body (8), the valve core body (8) is sheathed with a hand wheel (9), the spring (34) is sleeved on the valve stem (32) and extends out of the upper end of the upper cover (36) and the valve stem ( 32) The upper end is threadedly connected with an adjusting sleeve (10), the spring (34) is sleeved outside the adjusting sleeve (10), and the upper end of the spring (34) abuts against the flange (101) of the adjusting sleeve (10). The adjusting sleeve (10) is provided with a cylindrical connecting sleeve (11) that is circumferentially fixed to the handwheel (9), and the connecting sleeve (11) is threadedly connected to the top end of the valve stem (32). The limit screw (12), the inlet end of the inlet pipe (1) is connected with an inlet balance valve (13), the inlet of the pressure guiding pipe (7) and the inlet balance valve (13) The cavity is connected.
The self-balancing pipeline device according to claim 1, characterized in that the hand wheel (9) has a plurality of axially extending limit grooves, and the outer wall of the hand wheel (9) has two sides located on both sides of the limit groove. The pressure mark (14) of the valve core body (8) is threadedly connected with a nut (15), and the nut (15) has a one-to-one correspondence with the limit groove and indicates that it is stuck in the limit groove Block (151).
The self-balancing piping device according to claim 2, characterized in that the top end of the valve core body (8) has a circle of limit grooves, and the hand wheel (9) has a limit groove embedded in it. In the flange (91), the connecting sleeve (11) has a ring (111) protruding radially and abutting against the shoulder on the inner wall of the valve core body (8), and the connecting sleeve (11) 11) A circlip (16) pressed on the top of the valve core body (8) is also embedded.
A self-balancing pipeline device according to claim 3, characterized in that two sealing rings (17) are provided between the lower cover (35) and the differential pressure valve body (31), and the upper cover (36) and the valve core body (8) are provided with three sealing rings (18), the connecting sleeve (11) is embedded with a sealing ring four (19) sealed on the valve core body (8), the The lower end of the limit screw (12) is embedded with at least two sealing rings (20) sealed on the inner wall of the connecting sleeve (11), and the bottom end of the valve stem (32) is threadedly connected with a locking cap (21) ), a sealing gasket (22) is compressed between the locking cap (21) and the bottom end of the valve stem (32), and the locking cap (21) has an axial through hole (211).
The self-balancing pipeline device according to claim 4, wherein the valve stem (32) has a radially protruding support ring (321), the support ring (321) and the membrane A support block (23) sleeved on the valve stem (32) is provided between the sheets (33). The support block (23) has a support edge (231) that extends radially and is supported on the bottom surface of the diaphragm (33). The valve stem (32) is sleeved with a pressing ring (24) pressed on the top surface of the diaphragm (33), and the valve stem (32) is threadedly connected with a nut (25) for pressing the pressing ring (24).
A self-balancing pipeline device according to any one of claims 1-5, wherein the inlet balance valve (13) comprises an inlet valve body (131), a valve core (132), and a valve core sleeve (133), positioning screw (134), adjusting screw sleeve (135) and valve cover (136), the valve cover (136) is threadedly connected to the top of the inlet valve body (131), the valve cover ( 136) A valve core sleeve (133) which is limited in its circumferential direction is penetrated in the central axis. The valve core sleeve (133) is threadedly connected with the adjusting screw sleeve (135) through external threads. The adjusting screw sleeve ( 135) The outer wall has a limit block (137) circumferentially limited to the inner wall of the valve cover (136), the valve core (132) is rod-shaped and axially passes through the bottom end of the adjusting screw sleeve (135), the valve core ( 132) is threadedly connected with the adjusting screw sleeve (135) and a sealing gasket (138) is compressed between the valve core (132) and the bottom end of the adjusting screw sleeve (135), and the positioning screw (134) penetrates axially It is arranged in the valve core sleeve (133) and the upper end of the positioning screw (134) is threadedly connected with the valve core sleeve (133), and the outer cover of the valve cover (136) is provided with a circumferential limiter with the valve core sleeve (133) The handwheel sleeve (139), the handwheel sleeve (139) has a number of axially extending grooves, the outer wall of the handwheel sleeve (139) has pressure scales (140) located on both sides of the groove, the valve The cover (136) is threadedly connected with an indicator cap (141), and the indicator cap (141) has a protrusion (142) corresponding to the card slot one by one and located in the card slot.
The self-balancing pipeline device according to claim 6, wherein the bottom of the valve core (132) is spherical.
The self-balancing piping device according to claim 7, wherein the valve core sleeve (133) has a circle of bosses protruding radially and abutting against a step on the inner wall of the valve cover (136) (143), the valve core sleeve (133) is embedded with a clamp ring (26) pressed against the top end of the valve cover (136).
The self-balancing pipeline device according to claim 8, characterized in that, a sealing ring (27) is provided between the valve cover (136) and the inlet valve body (131), and the positioning wire The lower end of the rod (134) is embedded with at least two sealing rings (28) sealed on the inner wall of the valve core sleeve (133), and the valve core sleeve (133) is embedded with a boss (143) and a clamp ring (26) Sealing ring eight (29) between and sealed on the inner wall of the valve cover (136).
The self-balancing pipeline device according to claim 1, characterized in that the water inlet end of the water inlet pipe (1) and the water outlet end of the water outlet pipe (2) are both connected with a pressure gauge (30).