Water valve

Abstract

The present invention relates to a water valve, which comprises a valve seat and a backwash filter, a pressure reducing valve, a safety valve, a first throttle valve, a second throttle valve, a first pressure gauge and a second pressure gauge mounted on the valve seat. A first main water channel and a second main water channel are provided inside the valve seat. The water outlet of the backwash filter is connected to the inlet of the pressure reducing valve and the inlet of the first throttle valve through the first main water channel. The outlet of the pressure reducing valve is connected to the inlet of the second throttle valve and the inlet of the safety valve through the second main water channel. The pressure interface of the first pressure gauge communicates with the outlet of the pressure reducing valve through the internal passage of the valve seat. The pressure interface of the second pressure gauge communicates with the water outlet of the backwash filter through the internal passage of the valve seat. The present invention has a self-backwashing function, which can effectively reduce the situation of filter blockage and improve the dust reduction effect and cooling effect of the shearer.

Description

Technical Field

[0001] The present invention relates to a water valve, especially a water valve for the spray cooling system of a coal shearer, belonging to the technical field of coal mining equipment. Background Art

[0002] In the existing water valve for the spray cooling system of a coal shearer, during the use process, dirt in its waterway system accumulates more and more, often clogging the filter. First, it causes the spray dust reduction effect to become worse, affecting the operation of the coal shearer driver and increasing the amount of dust inhaled by workers. Second, the clogging of the filter will also cause the cooling water volume to become smaller and the cooling effect to become worse, which is not conducive to the cooling of the motor, rocker arm housing, and electric control system, and is extremely likely to cause damage to components, suspension of production systems, reduction of production efficiency, and cause greater economic losses to the mine side. Summary of the Invention

[0003] The purpose of the present invention is to provide a water valve with a self-backwashing function, which can effectively reduce the situation of filter clogging and improve the dust reduction effect and cooling effect of the coal shearer.

[0004] The main technical solutions of the present invention are as follows:

[0005] A water valve includes a valve seat and a backflush filter, a pressure reducing valve, a safety valve, a first throttle valve, a second throttle valve, a first pressure gauge, and a second pressure gauge installed on the valve seat. A first main waterway and a second main waterway are provided inside the valve seat. The water outlet of the backflush filter is connected to the inlet of the pressure reducing valve and the inlet of the first throttle valve through the first main waterway. The outlet of the pressure reducing valve is connected to the inlet of the second throttle valve and the inlet of the safety valve through the second main waterway. The pressure interface of the first pressure gauge communicates with the outlet of the pressure reducing valve through the internal passage of the valve seat, and the pressure interface of the second pressure gauge communicates with the water outlet of the backflush filter through the internal passage of the valve seat.

[0006] Preferably, the valve seat is in an L shape, divided into a vertical plate and a horizontal plate. The horizontal plate extends horizontally forward from the front of the vertical plate. The water outlet of the backflush filter is installed downward on the horizontal plate. The second throttle valve is installed on the upper part of the front of the vertical plate. The safety valve is installed on the front of the vertical plate, below the second throttle valve. The first pressure gauge and the second pressure gauge are installed at the front end of the horizontal plate. The pressure reducing valve and the first throttle valve are respectively installed on the upper and lower parts of the back of the vertical plate.

[0007] The pressure reducing valve can be fastened to the valve seat through the first set of fixing bolts. The water outlet of the first main water channel and the water inlet of the second main water channel provided on the back surface of the vertical plate are respectively butted and communicated with the water inlet and the water outlet of the pressure reducing valve, and the joint is sealed with an O-ring. The safety valve, the first throttle valve, the second throttle valve, the first pressure gauge and the second pressure gauge are all preferably installed on the valve seat by means of threaded connection.

[0008] A guard plate is fixedly installed at the front end of the horizontal plate. The first pressure gauge and the second pressure gauge are respectively embedded in an arc-shaped groove on the guard plate.

[0009] The beneficial effects of the present invention are as follows:

[0010] Due to the ingenious design of the valve seat of the water valve, the backflush filter, the pressure reducing valve, the safety valve, the throttle valve and the pressure gauge can be integrated together while the external dimensions of the water valve remain basically unchanged, and the backwashing function is added on the basis of the original function of the water valve.

[0011] It can effectively reduce the occurrence of component damage accidents caused by the blockage of the water valve filter, the deterioration of the dust removal and cooling effects of the spray cooling system, and improve the production efficiency and economic benefits.

[0012] The present invention has high reliability, simple structure, ingenious design, saves space and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1-1 is the front view of an embodiment of the present invention;

[0014] Figure 1-2 is Figure 1-1 the longitudinal sectional view of

[0015] Figure 1-3 is Figure 1-1 the top view of

[0016] Figure 2-1 is the front view of the valve seat;

[0017] Figure 2-2 is Figure 2-1 the A-A stepped sectional view of

[0018] Figure 2-3 is the left view of the valve seat;

[0019] Figure 2-4 is the rear view of the valve seat;

[0020] Figure 2-5 is the top view of the valve seat;

[0021] Figure 2-6 is Figure 2-5 the D-D sectional view of

[0022] Figure 3 Schematic structural diagram of an embodiment of the second throttle valve in the installed state.

[0023] Reference numerals:

[0024] 1. Water inlet joint seat; 2. Handle; 3. Backwash filter; 4. Guard plate; 5. Threaded hole; 6. Sewage outlet joint seat; 7. Valve seat; 7-1. First main water channel; 7-2. Second main water channel; 7-3. Water inlet groove; 7-4. Outlet of the first main water channel; 7-5. Inlet of the second main water channel; 7-6. Threaded hole for installing the second throttle valve; 7-7. Threaded hole for installing the safety valve; 7-8. Threaded hole for installing the pressure reducing valve; 7-9. Threaded hole for installing the first throttle valve; 7-10. Threaded hole for installing the pressure gauge; 8. First joint seat; 9. Pressure reducing valve; 10. First set of fixing bolts; 11. First throttle valve; 12. Second joint seat; 13. Second set of fixing bolts; 14. Second throttle valve; 14-1. Valve body; 14-2. Valve core; 14-3. Locking nut; 15. Safety valve; 16. Third set of fixing bolts; 17. First pressure gauge; 18. Second pressure gauge. Detailed implementation manners

[0025] The present invention discloses a water valve. As shown in FIGS. 1 to 3, it includes a valve seat 7 and a backwash filter 3, a pressure reducing valve 9, a safety valve 15, a first throttle valve 11, a second throttle valve 14, a first pressure gauge 17 and a second pressure gauge 18 installed on the valve seat. The valve seat internally is provided with a first main water channel 7-1 and a second main water channel 7-2. The outlet of the backwash filter is connected to the inlet of the pressure reducing valve and the inlet of the first throttle valve through the first main water channel. The outlet of the pressure reducing valve is connected to the inlet of the second throttle valve and the inlet of the safety valve through the second main water channel. After high-pressure water enters the valve seat through the backwash filter, it is divided into two paths. The first path directly enters the first throttle valve through the first main water channel, and then sequentially leads to the high-pressure rubber hoses for internal spraying of the left and right rocker arms of the shearer, the water channels in the rocker arm housing, the internal spraying water supply device of the rocker arm and enters the drum, and finally is sprayed out by the nozzles of the drum for dust reduction. By adjusting the first throttle valve, the water volume leading to the rocker arm can be adjusted. The second path enters the pressure reducing valve through the first main water channel for pressure reduction, and then enters the second throttle valve through the second main water channel. Subsequently, it first leads to the water channels of the motor and the electric control box to cool the motor and the electric control box, then leads to the water jacket of the rocker arm to cool the rocker arm, and finally is sprayed out by the nozzles on the rocker arm housing for dust reduction.

[0026] The pressure interface of the first pressure gauge communicates with the outlet of the pressure reducing valve through the internal passage of the valve seat, and the pressure interface of the second pressure gauge communicates with the water outlet of the backflush filter through the internal passage of the valve seat. When the water valve is working properly, the first pressure gauge 17 communicates with the water after pressure reduction, and is used to display the pressure of the water after pressure reduction in real time; the second pressure gauge 18 communicates with the high-pressure water that has been filtered but not pressure-reduced, and is used to display the inlet pressure of the high-pressure water in real time.

[0027] The valve seat is L-shaped and is divided into two parts: a vertical plate and a horizontal plate. The horizontal plate extends horizontally forward from the front of the vertical plate. The water outlet of the backflush filter is installed downward on the horizontal plate. In this embodiment, the backflush filter is fastened to the horizontal plate by the second fixing bolt group 13. The second throttle valve is installed on the upper part of the front of the vertical plate and is offset to the left or right side of the backflush filter. The safety valve is installed on the front of the vertical plate, below the second throttle valve. The first pressure gauge and the second pressure gauge are installed at the front end of the horizontal plate. The pressure reducing valve and the first throttle valve are respectively installed at the upper and lower parts of the back of the vertical plate. By adopting an L-shaped valve seat and installing the above-mentioned components at specific positions on the valve seat, the space is fully utilized. Without changing the basic external dimensions of the water valve, the backwashing function is added, and the integration of components such as the backflush filter, pressure reducing valve, safety valve, throttle valve, and pressure gauge is achieved.

[0028] An inlet water groove 7-3 is provided on the horizontal plate. The water outlet of the backflush filter is correspondingly connected to the inlet water groove. The inlet water groove is the water inlet of the first main water channel and provides positioning during the installation of the backflush filter at the same time.

[0029] The pressure reducing valve is fastened to the valve seat by the first fixing bolt group 10. The water outlet 7-4 of the first main water channel and the water inlet 7-5 of the second main water channel provided on the back of the vertical plate are respectively butted and communicated with the water inlet and water outlet of the pressure reducing valve, and the joint is sealed with an O-ring. The safety valve, the first throttle valve, the second throttle valve, the first pressure gauge, and the second pressure gauge are all installed on the valve seat by means of threaded connection. For this purpose, threaded holes 7-6 and 7-7 for installing the second throttle valve and the safety valve are machined on the front of the vertical plate of the valve seat, threaded holes 7-8 for installing the pressure reducing valve and 7-9 for installing the first throttle valve are machined on the back of the vertical plate, and threaded holes 7-10 for installing the pressure gauge are machined on the front end face of the horizontal plate.

[0030] There are two first throttle valves, which are installed horizontally side by side and respectively correspond to the inner spray systems of the left swing arm and the right swing arm. By adjusting the two first throttle valves, the water flow to the left and right swing arms can be made equal. The outlet of each first throttle valve is connected with a second joint seat 12 for connecting with a high-pressure rubber hose. There are four second throttle valves, which respectively lead to different cooling water channels and are installed vertically at intervals.

[0031] A plurality of threaded holes 5 are provided at the top of the backflush filter. In this embodiment, there are 5 M12 threaded holes, and the backflush filter can be firmly connected to the electric control box housing of the shearer by screwing in screws, thus realizing the firm connection between the water valve and the electric control box housing.

[0032] An inlet joint seat 1, a sewage outlet joint seat 6 and a handle 2 are installed on the backflush filter. The inlet joint seat and the handle are located on the front side of the cylinder body of the backflush filter, and the sewage outlet joint seat is located on the rear side of the cylinder body of the backflush filter.

[0033] A first joint seat 8 is further installed on the upper part of the back surface of the vertical plate. The first joint seat corresponds to the second throttle valve one by one. Among the corresponding first joint seat and the second throttle valve, the threaded hole for installing the first joint seat and the threaded hole for installing the second throttle valve are respectively communicated with each other through a section of optical hole located in the valve seat, and each section of optical hole is communicated with the second main water channel. As Figure 3 shown, the second throttle valve includes a valve body 14-1, a valve core 14-2 and a lock nut 14-3. The tail of the valve core is provided with an external thread, and the tail of the valve body is provided with an internal thread. The valve core passes through the valve body and is connected in the valve body through the external thread at its tail. By rotating the valve core, the axial position of the valve core relative to the valve body can be adjusted. After adjustment, the position of the valve core is locked by rotating the lock nut. Before the valve core needs to be adjusted again, first rotate the lock nut to make it leave the valve body. In the installed state, the valve body is connected to the valve seat through the external thread at its head, and the head of the valve core extends into the optical hole. By adjusting the head of the valve core to make it extend outwards, the water inlet channel of the first joint seat can be closed down, thereby reducing the flow rate. On the contrary, the flow rate increases. By adjusting the four second throttle valves, the water volumes flowing to the four first joint seats can be made equivalent. In an extreme case, the head of the valve core can extend outwards to be inserted into the seat hole at the inlet of the first joint seat, and a seal is formed between the valve core and the seat hole through the sealing ring sleeved on the valve core, so that the flow rate drops to zero, that is, it is equivalent to closing the inlet of the first joint seat. With the second throttle valve having such a structure cooperating with the first joint seat, and the second throttle valve being installed on the front surface of the vertical plate, not only the space occupied by the entire water valve is saved, but also the operation of flow rate adjustment is extremely convenient.

[0034] A guard plate 4 is fixedly installed at the front end of the transverse plate through a third fixing bolt group 16. The first pressure gauge and the second pressure gauge are respectively embedded in an arc-shaped groove on the guard plate. The front end faces of the first pressure gauge and the second pressure gauge do not protrude beyond the guard plate, and the guard plate can effectively protect the first pressure gauge and the second pressure gauge.

[0035] When the coal shearer cuts coal, turn the handle 2 to the water inlet position, and high-pressure water enters the water valve and is divided into two paths. One path is used for the internal spray system of the left and right rocker arms to realize spray dust reduction at the nozzles on the drum, and the other path realizes the cooling of the motor, the electric control box, and the rocker arm, as well as dust reduction at the nozzles on the rocker arm. When backwashing is required, turn the handle 2 to the backwashing position, and the high-pressure water flushes out the dirt outside the filter screen of the backflush filter, and the dirt is discharged from the sewage outlet joint seat 6. When the coal shearer needs to be shut down for maintenance, turn the handle 2 to the closed position to stop the high-pressure water from entering, and normal maintenance can be carried out.

[0036] The water valve of the present invention can effectively reduce or avoid the blockage of the water valve filter, so it can reduce the occurrence of the situation where the dust removal and cooling effects of the spray cooling system become poor, and can also avoid the occurrence of component damage accidents caused by filter blockage, thus improving production efficiency and economic benefits.

Claims

1. A water valve, characterized in that: It includes a valve seat, and a backwash filter, a pressure reducing valve, a safety valve, a first throttle valve, a second throttle valve, a first pressure gauge and a second pressure gauge installed on the valve seat. Inside the valve seat, there are a first main water channel and a second main water channel. The water outlet of the backwash filter is connected to the inlet of the pressure reducing valve and the inlet of the first throttle valve through the first main water channel. The outlet of the pressure reducing valve is connected to the inlet of the second throttle valve and the inlet of the safety valve through the second main water channel. The pressure interface of the first pressure gauge communicates with the outlet of the pressure reducing valve through the internal passage of the valve seat. The pressure interface of the second pressure gauge communicates with the water outlet of the backwash filter through the internal passage of the valve seat. The valve seat is L-shaped, divided into a vertical plate and a horizontal plate. The horizontal plate extends horizontally forward from the front of the vertical plate. The water outlet of the backwash filter is installed downward on the horizontal plate. The second throttle valve is installed on the upper part of the front of the vertical plate. The safety valve is installed on the front of the vertical plate, below the second throttle valve. The first pressure gauge and the second pressure gauge are installed at the front end of the horizontal plate. The pressure reducing valve and the first throttle valve are respectively installed on the upper and lower parts of the back of the vertical plate. On the upper part of the back of the vertical plate, there is also a first joint seat. The first joint seat corresponds to the second throttle valve one by one. In the corresponding first joint seat and the second throttle valve, the threaded hole for installing the first joint seat and the threaded hole for installing the second throttle valve are connected to each other through a section of smooth hole located inside the valve seat. The smooth hole is connected to the second main water channel. The second throttle valve includes a valve body, a valve core and a locking nut. The tail of the valve core is provided with an external thread, and the tail of the valve body is provided with an internal thread. The valve core passes through the valve body and is connected to the inside of the valve body through the external thread at its tail, and is fixed by the locking nut. In the installed state, the valve body is connected to the valve seat through the external thread at its head. The head of the valve core extends into the smooth hole. By adjusting the head of the valve core of the second throttle valve to make it extend outwards, the water inlet channel of the first joint seat is closed, thereby reducing the flow rate. Conversely, the flow rate is increased. By adjusting each second throttle valve, the amount of water flowing to the corresponding first joint seat is made equal. In extreme cases, the head of the valve core of the second throttle valve extends out to insert into the seat hole at the inlet of the first joint seat, and a seal is formed between the valve core and the seat hole through the sealing ring sleeved on the valve core, so that the flow rate drops to zero.

2. The water valve according to claim 1, characterized in that: The pressure reducing valve is fastened to the valve seat by a first set of fixing bolts. The water outlet of the first main water channel and the water inlet of the second main water channel provided on the back of the vertical plate are respectively butted and communicated with the water inlet and the water outlet of the pressure reducing valve, and the joint is sealed with an O-ring. The safety valve, the first throttle valve, the second throttle valve, the first pressure gauge and the second pressure gauge are all installed on the valve seat by means of threaded connection.

3. The water valve according to claim 1, characterized in that: There are two first throttle valves and four second throttle valves.

4. The water valve according to claim 1, characterized in that: The top of the backwash filter is provided with a number of threaded holes.

5. The water valve according to claim 1, wherein: An inlet joint seat, a sewage outlet joint seat and a handle are installed on the backwash filter.

6. The water valve according to claim 1, 2, 3, 4 or 5, characterized in that: A guard plate is fixedly installed at the front end of the cross plate, and the first pressure gauge and the second pressure gauge are respectively embedded in an arc-shaped groove on the guard plate.

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