Pressure reduction pipeline circulating valve

Abstract

The utility model discloses a pressure reducing pipeline circulating valve, which relates to the technical field of pressure reducing valves and comprises a valve body and a valve core component, a water inlet interface and a water outlet interface are respectively arranged at two ends of the valve body, a first cavity, a second cavity and a third cavity are arranged in the valve body, and a valve cover and a bottom cover are arranged on the valve body. The valve core assembly comprises an adjusting screw rod, a first spring, a piston main body, a connecting rod, a valve core main body and a second spring, the piston main body is arranged to replace a diaphragm in a traditional pressure reduction pipeline circulating valve, so that the pressure reduction pipeline circulating valve has the advantages that the service life is longer, and the condition of pressure reduction failure is not easy to occur. The problem that after an existing decompression pipeline circulating valve is used for a long time, a diaphragm is prone to being damaged, and decompression fails is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure reducing valve technical field relates to pressure reducing pipeline circulation valve, especially a kind of pressure reducing valve for water circulation pipeline. BACKGROUND

[0002] Pressure reducing pipeline circulation valve is a kind of pressure reducing valve for water circulation pipeline.Pressure reducing valve is a kind of valve by adjusting, import pressure is reduced to certain required export pressure, and relies on the energy of medium itself, makes export pressure automatic and keeps stable.From the viewpoint of fluid mechanics, pressure reducing valve is a throttle element with variable local resistance, i.e.

[0003] The pressure reducing valve for water circulation pipeline in prior art is mostly diaphragm type, and the structure of diaphragm type pressure reducing valve is ingenious, although it can effectively achieve the purpose of pressure reduction, but after long time use, diaphragm is prone to damage, leading to pressure reduction failure problem.Therefore, we urgently need a pressure reducing pipeline circulation valve with simple structure and long service life.

[0004] In the application number for: CN201410751460.8, the publication number CN104482292A discloses a kind of pressure reducing valve device in water supply hydraulic system, including pressure reducing valve body, the both ends of pressure reducing valve body are equipped with water inlet pipeline and water outlet pipeline, and the inner cavity of pressure reducing valve body is equipped with water storage bin and passageway, water storage bin is communicated with water outlet pipeline, the top of pressure reducing valve body is equipped with handle that penetrates to inner cavity, and spiral spring is vertically arranged in inner cavity, one end of spiral spring is connected with handle, the other end of spiral spring is connected with diaphragm, the bottom of diaphragm is connected with vertically arranged column rod, column rod is connected with elastic clamping plate, and rubber plate is equipped on elastic clamping plate, the bottom of elastic clamping plate is connected with tension spring fixed on the wall of inner cavity, and water inlet pipeline is communicated with spray pipe through passageway in pressure reducing valve body.It is although simple structure, but it is still prone to diaphragm damage after long time use, leading to pressure reduction failure problem. UTILITY MODEL CONTENTS

[0005] Therefore, in view of the above problems, the utility model provides pressure reducing pipeline circulation valve, solve the problem that current pressure reducing pipeline circulation valve is prone to diaphragm damage after long time use, leading to pressure reduction failure.

[0006] The technical scheme of the utility model is:

[0007] A pressure-reducing pipeline circulation valve includes a valve body and a valve core assembly. The valve body has an inlet port and an outlet port at both ends. The valve body has a first cavity, a second cavity, and a third cavity. The first cavity and the second cavity are connected at one end through a first flow channel. A partition ring is provided between the second cavity and the third cavity. The partition ring has a second flow channel for connecting the second cavity and the third cavity. One end of the inlet port is connected to the second cavity, and one end of the outlet port is connected to both the first cavity and the third cavity.

[0008] The valve body is provided with a valve cover and a bottom cover, which are detachably connected to the valve body. The valve cover is configured to cooperate with the first cavity, and the bottom cover is configured to cooperate with the third cavity.

[0009] The valve core assembly includes an adjusting screw, a first spring, a piston body, a connecting rod, a valve core body, and a second spring. The adjusting screw is disposed in the first cavity, with one end passing through the valve cover and threadedly connected to it. The other end of the adjusting screw is provided with a limiting plate. The piston body is slidably disposed in the first cavity, with its lower end slidably disposed in the first flow channel. The first spring is disposed between the limiting plate and the piston body. The connecting rod is disposed in the second cavity, with one end extending into the first flow channel and fixedly connected to the piston body, and the other end passing through the second flow channel and extending into the third cavity. The valve core body is disposed in the third cavity and detachably connected to the connecting rod. The second spring is disposed between the valve core body and the bottom cover.

[0010] Preferably, the valve body is provided with a first mounting port for installing a valve cover. The first mounting port is located above the first cavity and communicates with the first cavity. The lower end of the valve cover can be inserted into the first mounting port and is detachably connected to the first mounting port by a thread.

[0011] Preferably, the bottom of the valve cover is provided with a first limiting ring, one end of which is fixedly connected to the bottom of the valve cover, and the other end can be inserted into the first cavity and slidably connected to the first cavity.

[0012] Preferably, the valve body is provided with a second mounting port for installing the bottom cover. The second mounting port is located below the third cavity and communicates with the third cavity. The upper end of the bottom cover can be inserted into the second mounting port and is threadedly connected to the second mounting port.

[0013] Preferably, the second mounting port is provided with a second limiting ring that mates with the upper end of the bottom cover. When the upper end of the bottom cover is connected to the second mounting port, the end of the upper end of the bottom cover can contact the second limiting ring. The end of the upper end of the bottom cover is provided with a first sealing ring.

[0014] Preferably, the water inlet is connected to the second cavity through the first connecting port, and one end of the water outlet is connected to the third cavity through the second connecting port, and is connected to the bottom of the first cavity through the third flow channel.

[0015] Preferably, a second sealing ring is provided on the side of the piston body that is slidably connected to the first cavity, and a third sealing ring is provided on the side of the piston body that is slidably connected to the first flow channel.

[0016] Preferably, the valve core body includes a plugging part and a sealing part. The sealing part is sleeved on the outside of the plugging part and is fixedly connected to the plugging part. The plugging part is sleeved on the connecting rod and is threadedly connected to the connecting rod. One end of the plugging part is located in the second flow channel and is slidably connected to the second flow channel. A sealing gasket is provided on the sealing part. The sealing gasket is detachably connected to the sealing part. The sealing part and the sealing gasket can contact the bottom of the isolation ring.

[0017] Preferably, a pressure gauge interface connected to the water outlet is provided on one side of the valve body, and a sealing cap is provided at the pressure gauge interface, with the sealing cap being threadedly connected to the pressure gauge interface.

[0018] Preferably, a filter element is provided on one side of the valve body to cooperate with the water inlet interface. The filter element includes a fixed sleeve and a filter membrane. One end of the fixed sleeve can be inserted into the water inlet interface and is detachably connected to the water inlet interface by a thread. The filter membrane is detachably disposed at the end of the fixed sleeve inserted into the water inlet interface. A limiting step is provided in the water inlet interface. When the fixed sleeve is connected to the water inlet interface, one end of the filter membrane contacts the fixed sleeve and the other end contacts the limiting step. The other end of the fixed sleeve can be connected to an external water inlet pipe.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention replaces the diaphragm in traditional pressure-reducing pipeline circulation valves with a piston body, resulting in a longer service life and reduced likelihood of pressure reduction failure. It solves the problem of diaphragm damage and pressure reduction failure that often occurs in current pressure-reducing pipeline circulation valves after prolonged use. In operation, the adjusting screw compresses the first and second springs, causing the piston body to move and the valve core to open. This allows the medium entering through the inlet to pass through the second and third chambers and enter the outlet. Once inside the outlet, the medium pushes the piston body upwards until it balances the forces of the first and second springs, maintaining a certain valve core opening. When the pressure of the medium in the outlet increases, it overcomes the force of the first spring, pushing the piston body upwards and reducing the valve core opening, thus decreasing the amount of medium entering the outlet and lowering the pressure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the pressure-reducing pipeline circulation valve described in this embodiment of the utility model;

[0022] Figure 2This is a cross-sectional structural schematic diagram of the pressure-reducing pipeline circulation valve described in this utility model embodiment;

[0023] Figure 3 This is a schematic diagram of the valve core assembly described in the embodiments of this utility model;

[0024] Figure 4 This is a cross-sectional structural schematic diagram of the valve core assembly described in this embodiment of the present utility model;

[0025] Figure 5 This is a cross-sectional structural diagram of the valve body described in the embodiment of this utility model;

[0026] Figure 6 This is an exploded structural diagram of the filter element described in the embodiments of this utility model;

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-Valve body, 100-Inlet port, 101-Outlet port, 102-First cavity, 103-Second cavity, 104-Third cavity, 105-First flow channel, 106-Isolation ring, 107-Second flow channel, 108-Valve cover, 109-Bottom cover, 110-First mounting port, 111-First limiting ring, 112-Second mounting port, 113-Second limiting ring, 114-First sealing ring, 115-First connecting port, 116-Second connecting port, 117-Third flow channel 118-Second sealing ring, 119-Third sealing ring, 120-Pressure gauge interface, 121-Sealing cap, 122-Limiting step, 20-Valve core assembly, 200-Adjusting screw, 201-First spring, 202-Piston body, 203-Connecting rod, 204-Valve core body, 205-Second spring, 206-Limiting plate, 207-Sealing part, 208-Sealing part, 209-Sealing gasket, 30-Filter element, 300-Fixing sleeve, 301-Filter membrane. Detailed Implementation

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] Example:

[0031] like Figures 1 to 5As shown, in order to solve the above problems, this embodiment discloses a pressure-reducing pipeline circulation valve, including a valve body 10 and a valve core assembly 20. The valve body 10 is provided with an inlet port 100 and an outlet port 101 at both ends. The valve body 10 is provided with a first cavity 102, a second cavity 103 and a third cavity 104. The first cavity 102 and the second cavity 103 are connected at one end through a first flow channel 105. A partition ring 106 is provided between the second cavity 103 and the third cavity 104. The partition ring 106 is provided with a second flow channel 107 for connecting the second cavity 103 and the third cavity 104. One end of the inlet port 100 is connected to the second cavity 103, and one end of the outlet port 101 is connected to the first cavity 102 and the third cavity 104 respectively.

[0032] The valve body 10 is provided with a valve cover 108 and a bottom cover 109. The valve cover 108 and the bottom cover 109 are detachably connected to the valve body 10. The valve cover 108 is configured to cooperate with the first cavity 102, and the bottom cover 109 is configured to cooperate with the third cavity 104.

[0033] The valve core assembly 20 includes an adjusting screw 200, a first spring 201, a piston body 202, a connecting rod 203, a valve core body 204, and a second spring 205. The adjusting screw 200 is disposed within the first cavity 102. One end of the adjusting screw 200 passes through the valve cover 108 and is threadedly connected to the valve cover 108. The other end of the adjusting screw 200 is provided with a limiting plate 206. The piston body 202 is slidably disposed within the first cavity 102, and the lower end of the piston body 202 is slidably disposed within the first flow channel 1. Inside the 05, the first spring 201 is disposed between the limiting plate 206 and the piston body 202. The connecting rod 203 is disposed inside the second cavity 103. One end of the connecting rod 203 extends into the first flow channel 105 and is fixedly connected to the piston body 202. The other end passes through the second flow channel 107 and extends into the third cavity 104. The valve core body 204 is disposed inside the third cavity 104 and is detachably connected to the connecting rod 203. The second spring 205 is disposed between the valve core body 204 and the bottom cover 109.

[0034] This invention replaces the diaphragm in a traditional pressure-reducing pipeline circulation valve with a piston body 202, resulting in a longer service life and reduced likelihood of pressure reduction failure. It solves the problem of diaphragm damage and pressure reduction failure that often occurs in current pressure-reducing pipeline circulation valves after prolonged use. In operation, the adjusting screw 200 compresses the first spring 201 and the second spring 205, causing the piston body 202 to move and the valve core body 204 to open. This allows the medium entering through the inlet port 100 to pass through the second chamber 103 and the third chamber 104 into the outlet port 101. Once inside the outlet port 101, the medium pushes the piston body 202 upwards until it balances the forces of the first spring 201 and the second spring 205. At this point, the valve core body 204 remains at a certain opening. When the pressure of the medium in the outlet 101 rises, it overcomes the force of the first spring 201 and pushes the piston body 202 to move upward, thereby reducing the opening of the valve core body 204, thus reducing the amount of medium entering the outlet 101 and lowering the pressure.

[0035] like Figure 2 As shown, it should be noted that the limiting disc 206 is rotatably connected to the inner wall of the valve cover 108. The two ends of the first spring 201 are in contact with the limiting disc 206 and the piston body 202, respectively. Both the limiting disc 206 and the piston body 202 are provided with protrusions that cooperate with the first spring 201. The two ends of the first spring 201 are respectively sleeved on the outside of the protrusions. The two ends of the second spring 205 are in contact with the valve core body 204 and the bottom cover 109, respectively. Both the valve core body 204 and the bottom cover 109 are provided with protrusions that cooperate with the second spring 205. The two ends of the second spring 205 are respectively sleeved on the outside of the protrusions.

[0036] like Figure 2 As shown, in order to facilitate the installation of the valve cover 108, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that the valve body 10 is provided with a first mounting port 110 for installing the valve cover 108. The first mounting port 110 is located above the first cavity 102 and communicates with the first cavity 102. The lower end of the valve cover 108 can be inserted into the first mounting port 110 and is detachably connected to the first mounting port 110 by threads.

[0037] The use of threaded connections facilitates the installation of the valve cover 108. Furthermore, the threaded connection allows for improved sealing between the valve cover 108 and the valve body 10 during installation by wrapping with sealing tape or adding sealant.

[0038] The valve cover 108 has a first limiting ring 111 at the bottom. One end of the first limiting ring 111 is fixedly connected to the bottom of the valve cover 108, and the other end can be inserted into the first cavity 102 and slidably connected to the first cavity 102.

[0039] The first limiting ring 111 can limit the maximum movement of the piston body 202, thereby extending the service life of the first spring 201.

[0040] like Figure 2 As shown, in order to facilitate the installation of the bottom cover 109, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that the valve body 10 is provided with a second mounting port 112 for installing the bottom cover 109. The second mounting port 112 is located below the third cavity 104 and communicates with the third cavity 104. The upper end of the bottom cover 109 can be inserted into the second mounting port 112 and is threadedly connected to the second mounting port 112.

[0041] The second mounting port 112 is provided with a second limiting ring 113 that cooperates with the upper end of the bottom cover 109. When the upper end of the bottom cover 109 is connected to the second mounting port 112, the end of the upper end of the bottom cover 109 can contact the second limiting ring 113. The end of the upper end of the bottom cover 109 is provided with a first sealing ring 114.

[0042] The threaded connection facilitates the installation of the bottom cover 109. Furthermore, the threaded connection allows for improved sealing between the bottom cover 109 and the valve body 10 during installation by wrapping with sealing tape or adding sealant. Additionally, the second limiting ring 113 and the first sealing ring 114 at the upper end of the bottom cover 109 further enhance the sealing between the bottom cover 109 and the valve body 10.

[0043] like Figure 5 As shown, in order to facilitate the flow of the medium, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that the water inlet 100 is connected to the second cavity 103 through the first connecting port 115, and one end of the water outlet 101 is connected to the third cavity 104 through the second connecting port 116, and is connected to the bottom of the first cavity 102 through the third flow channel 117.

[0044] like Figure 4 As shown, in order to improve the sealing performance of this utility model during use, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that a second sealing ring 118 is provided on the side where the piston body 202 is slidably connected to the first cavity 102, and a third sealing ring 119 is provided on the side where the piston body 202 is slidably connected to the first flow channel 105.

[0045] The second sealing ring 118 and the third sealing ring 119 are detachably connected to the piston body 202.

[0046] During use, the sealing performance between the piston body 202 and the first cavity 102 and the first flow channel 105 can be maintained by replacing the second sealing ring 118 and the third sealing ring 119.

[0047] like Figure 4 As shown, in order to facilitate the flow of the medium, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that the valve core body 204 includes a plugging part 207 and a sealing part 208. The sealing part 208 is sleeved on the outside of the plugging part 207 and is fixedly connected to the plugging part 207. The plugging part 207 is sleeved on the connecting rod 203 and is threadedly connected to the connecting rod 203. One end of the plugging part 207 is located in the second flow channel 107 and is slidably connected to the second flow channel 107. A sealing gasket 209 is provided on the sealing part 208. The sealing gasket 209 is detachably connected to the sealing part 208. The sealing part 208 and the sealing gasket 209 can contact the bottom of the isolation ring 106.

[0048] By setting a removable sealing gasket 209, the valve core body 204 and the partition plate can have better sealing performance, and the sealing gasket 209 can be replaced during subsequent maintenance.

[0049] like Figure 2 As shown, in order to facilitate observation of the pressure of the medium in the water outlet 101, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that a pressure gauge interface 120 communicating with the water outlet 101 is provided on one side of the valve body 10, and a sealing cap 121 is provided at the pressure gauge interface 120, and the sealing cap 121 is threadedly connected to the pressure gauge interface 120.

[0050] When a pressure gauge needs to be installed, simply unscrew the cap 121 and install the pressure gauge at the pressure gauge interface 120.

[0051] like Figure 1 , Figure 6As shown, since this utility model is mainly used in the water circulation system of industrial production process, there are usually some scale and other impurities in the circulating water. In order to facilitate the filtration of these impurities and facilitate the cleaning or replacement of the filter element 30, this embodiment is modified based on the above embodiment. The difference from the above embodiment is that the valve body 10 is provided with a filter element 30 that cooperates with the water inlet interface 100 on one side. The filter element 30 includes a fixed sleeve 300 and a filter membrane 301. One end of the fixed sleeve 300 can be inserted into the water inlet interface 100 and is detachably connected to the water inlet interface 100 by threads. The filter membrane 301 is detachably set at the end of the fixed sleeve 300 inserted into the water inlet interface 100. The water inlet interface 100 is provided with a limiting step 122. When the fixed sleeve is connected to the water inlet interface 100, one end of the filter membrane 301 contacts the fixed sleeve 300 and the other end contacts the limiting step 122. The other end of the fixed sleeve 300 can be connected to the water inlet pipe.

[0052] The threaded connection facilitates the removal and installation of the fixing sleeve 300, thereby simplifying the cleaning and replacement of the filter membrane 301. The filter membrane 301 can utilize existing filter membranes capable of achieving the functions of this invention, primarily serving to filter scale. The filter membrane 301 has several filter holes in its center, with a pore diameter ranging from 0.1 to 0.2 mm.

[0053] Working principle of this utility model:

[0054] In use, this invention can be achieved by driving the adjusting screw 200 to compress the first spring 201 and the second spring 205, causing the piston body 202 to move and the valve core body 204 to open. This allows the medium entering through the inlet port 100 to pass through the second chamber 103 and the third chamber 104 into the outlet port 101. After entering the outlet port 101, the medium pushes the piston body 202 upward until it is balanced with the forces of the first spring 201 and the second spring 205. At this point, the valve core body 204 maintains a certain opening. When the pressure of the medium in the outlet port 101 rises, it overcomes the force of the first spring 201, pushing the piston body 202 upward, thereby reducing the opening of the valve core body 204. This reduces the amount of medium entering the outlet port 101 and lowers the pressure.

[0055] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A pressure-reducing pipeline circulation valve, characterized in that, The valve body (10) includes a valve body (10) and a valve core assembly (20). The valve body (10) has an inlet port (100) and an outlet port (101) at both ends. The valve body (10) has a first cavity (102), a second cavity (103) and a third cavity (104). The first cavity (102) and the second cavity (103) are connected by a first flow channel (105). A partition ring (106) is provided between the second cavity (103) and the third cavity (104). The partition ring (106) is provided with a second flow channel (107) for connecting the second cavity (103) and the third cavity (104). One end of the inlet port (100) is connected to the second cavity (103), and one end of the outlet port (101) is connected to the first cavity (102) and the third cavity (104) respectively. The valve body (10) is provided with a valve cover (108) and a bottom cover (109). The valve cover (108) and the bottom cover (109) are detachably connected to the valve body (10). The valve cover (108) is configured to cooperate with the first cavity (102), and the bottom cover (109) is configured to cooperate with the third cavity (104). The valve core assembly (20) includes an adjusting screw (200), a first spring (201), a piston body (202), a connecting rod (203), a valve core body (204), and a second spring (205). The adjusting screw (200) is disposed in the first cavity (102). One end of the adjusting screw (200) passes through the valve cover (108) and is threadedly connected to the valve cover (108). The other end of the adjusting screw (200) is provided with a limiting plate (206). The piston body (202) is slidably disposed in the first cavity (102), and the lower end of the piston body (202) is slidably disposed in the first flow channel (…). Inside 105), the first spring (201) is located between the limiting plate (206) and the piston body (202), the connecting rod (203) is located inside the second cavity (103), one end of the connecting rod (203) extends into the first flow channel (105) and is fixedly connected to the piston body (202), and the other end extends through the second flow channel (107) into the third cavity (104), the valve core body (204) is located inside the third cavity (104) and is detachably connected to the connecting rod (203), and the second spring (205) is located between the valve core body (204) and the bottom cover (109).

2. The pressure-reducing pipeline circulation valve according to claim 1, characterized in that, The valve body (10) is provided with a first mounting port (110) for mounting the valve cover (108). The first mounting port (110) is located above the first cavity (102) and communicates with the first cavity (102). The lower end of the valve cover (108) can be inserted into the first mounting port (110) and is detachably connected to the first mounting port (110) by threads.

3. The pressure-reducing pipeline circulation valve according to claim 2, characterized in that, The valve cover (108) is provided with a first limiting ring (111) at the bottom. One end of the first limiting ring (111) is fixedly connected to the bottom of the valve cover (108), and the other end can be inserted into the first cavity (102) and slidably connected to the first cavity (102).

4. The pressure-reducing pipeline circulation valve according to claim 2 or 3, characterized in that, The valve body (10) is provided with a second mounting port (112) for mounting the bottom cover (109). The second mounting port (112) is located below the third cavity (104) and communicates with the third cavity (104). The upper end of the bottom cover (109) can be inserted into the second mounting port (112) and is threadedly connected to the second mounting port (112).

5. The pressure-reducing pipeline circulation valve according to claim 4, characterized in that, The second mounting port (112) is provided with a second limiting ring (113) that cooperates with the upper end of the bottom cover (109). When the upper end of the bottom cover (109) is connected to the second mounting port (112), the end of the upper end of the bottom cover (109) can contact the second limiting ring (113). The end of the upper end of the bottom cover (109) is provided with a first sealing ring (114).

6. The pressure-reducing pipeline circulation valve according to claim 5, characterized in that, The water inlet (100) is connected to the second cavity (103) through the first connecting port (115), and one end of the water outlet (101) is connected to the third cavity (104) through the second connecting port (116), and is connected to the bottom of the first cavity (102) through the third flow channel (117).

7. The pressure-reducing pipeline circulation valve according to claim 6, characterized in that, A second sealing ring (118) is provided on the side where the piston body (202) is slidably connected to the first cavity (102), and a third sealing ring (119) is provided on the side where the piston body (202) is slidably connected to the first flow channel (105).

8. The pressure-reducing pipeline circulation valve according to claim 7, characterized in that, The valve core body (204) includes a plugging part (207) and a sealing part (208). The sealing part (208) is sleeved on the outside of the plugging part (207) and is fixedly connected to the plugging part (207). The plugging part (207) is sleeved on the connecting rod (203) and is threadedly connected to the connecting rod (203). One end of the plugging part (207) is located inside the second flow channel (107) and is slidably connected to the second flow channel (107). A sealing gasket (209) is provided on the sealing part (208). The sealing gasket (209) is detachably connected to the sealing part (208). The sealing part (208) and the sealing gasket (209) can contact the bottom of the isolation ring (106).

9. The pressure-reducing pipeline circulation valve according to claim 8, characterized in that, The valve body (10) has a pressure gauge interface (120) on one side that is connected to the water outlet interface (101). A sealing cap (121) is provided at the pressure gauge interface (120), and the sealing cap (121) is threadedly connected to the pressure gauge interface (120).

10. The pressure-reducing pipeline circulation valve according to claim 9, characterized in that, A filter element (30) is provided on one side of the valve body (10) to cooperate with the water inlet (100). The filter element (30) includes a fixed sleeve (300) and a filter membrane (301). One end of the fixed sleeve (300) can be inserted into the water inlet (100) and is detachably connected to the water inlet (100) by a thread. The filter membrane (301) is detachably provided at the end of the fixed sleeve (300) inserted into the water inlet (100). The water inlet (100) is provided with a limiting step (122). When the fixed sleeve is connected to the water inlet (100), one end of the filter membrane (301) contacts the fixed sleeve (300) and the other end contacts the limiting step (122). The other end of the fixed sleeve (300) can be connected to an external water inlet pipe.

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