Guiding type non-retention melt three-way valve

Abstract

The utility model relates to the technical field of three-way valves, and discloses a guide type non-retention melt three-way valve which comprises a valve body, sealing valve rod assemblies used for opening or closing an internal channel of the valve body are arranged on the two sides of the valve body, and a driving assembly used for driving the sealing valve rod assembly to move is arranged on one side of each sealing valve rod assembly. A melt inlet is formed in the top of the valve body, melt outlets are formed in the two sides of the bottom of the valve body, and moving openings communicated with the adjacent melt outlets are formed in the two sides of the valve body. According to the three-way valve, by arranging the sealing valve rod assembly and the driving assembly, when the melt outlet needs to be closed, the driving assembly can drive the sealing valve rod assembly to move by rotating a valve rotating disc of the driving assembly, so that the melt outlet is blocked and closed, and guiding parts of the three-way valve are reduced; therefore, the possibility of loosening parts caused by vibration is reduced, and the service life of the three-way valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of three-way valves, in particular to a guided three-way valve without retention of melt. Background Art

[0002] At present, melt three-way valves are used in the high-viscosity molten plastic spinning production process to distribute flow. Melt valves are used to directly extract and cut off high-temperature melt flows or polymers from pipelines. Melt valves mainly solve the problems of large dead angles and large operating torques of existing melt three-way valves.

[0003] A Chinese utility model patent with announcement number CN213017891 U discloses a melt three-way valve without a stagnation zone. Although the above-mentioned prior art can effectively avoid the advantage of the stagnation zone, the three-way guide valve has a long switch stroke and many auxiliary guide parts. The impact force of each melt passing through the three-way valve will cause the three-way valve to vibrate. Repeated vibrations will loosen the auxiliary guide parts. The loose parts will reduce the performance and service life of the three-way valve, resulting in high cost of use. Therefore, it is necessary to design a guide-type melt three-way valve without stagnation with simple guidance and fewer internal parts. Utility Model Content

[0004] In order to solve the technical problem that the internal guide parts of the existing non-retention melt three-way valve are prone to loosening, the utility model provides a guide type non-retention melt three-way valve.

[0005] The utility model is implemented by the following technical scheme: a guided three-way valve without melt retention, including a valve body, both sides of the valve body are provided with sealing valve stem assemblies for opening or closing the internal channel of the valve body, one side of each of the sealing valve stem assemblies is provided with a driving assembly for driving the sealing valve stem assembly to move, the top of the valve body is provided with a melt inlet, the bottom of the valve body is provided with melt outlets on both sides, both sides of the valve body are provided with moving ports connected to adjacent melt outlets, the sealing valve stem assembly includes a sealing rod slidably arranged inside the moving port, a connecting block fixedly installed at one end of the sealing rod, and a sealing block fixedly installed on one side of the connecting block.

[0006] Through the above technical solution, the driving assembly can drive the sealing valve stem assembly to block the melt outlet of the valve body.

[0007] As a further improvement of the above solution, one side of the sealing block is arranged in an inclined shape.

[0008] Through the above technical solution, the obliquely arranged sealing block can assist in guiding the melt when the melt flows.

[0009] As a further improvement of the above solution, the connecting block is configured in a trumpet shape with one side narrowed.

[0010] Through the above technical solution, the connecting block will not occupy too much space for the melt to flow when the melt flows.

[0011] As a further improvement of the above solution, a limit plate is fixedly installed on one end of the two sealing rods, a push rod is fixedly installed on one side of the two limit plates, and a rack is fixedly installed on one side of the two push rods.

[0012] Through the above technical solution, when the push rod moves, the sealing rod will move with the sealing block, thereby closing and blocking the melt outlet.

[0013] As a further improvement of the above solution, the driving assembly includes a valve turntable arranged on one side of the push rod, a driving rod fixedly installed on one side of the valve turntable and a driving gear fixedly sleeved on the driving rod, and the driving gear is meshed and connected with an adjacent rack.

[0014] Through the above technical solution, the valve turntable rotates, which causes the driving gear to drive the rack to move.

[0015] As a further improvement of the above solution, both sides of the valve body are provided with a protective shell for protecting the internal sealing valve stem assembly and the drive assembly.

[0016] Through the above technical solution, the protective shell facilitates the installation of the three-way valve.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model provides a sealing valve stem assembly and a driving assembly. When the melt outlet needs to be closed, the valve turntable of the driving assembly is rotated, so that the driving assembly can move with the sealing valve stem assembly, thereby blocking and closing the melt outlet. This arrangement reduces the number of guiding parts of the three-way valve, thereby reducing the possibility of loosening of parts due to vibration and extending the service life of the three-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model having a sealing valve stem assembly and a driving assembly;

[0021] Figure 3 For this utility model Figure 1 A-section structure enlarged view.

[0022] Description of main symbols:

[0023] 1. Valve body; 201. Sealing rod; 202. Connecting block; 203. Sealing block; 301. Valve turntable; 302. Driving rod; 303. Driving gear; 4. Limiting plate; 5. Push rod; 6. Rack; 7. Protective shell. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0025] Please combine Figure 1-Figure 3 , a guided non-retention melt three-way valve of the present embodiment comprises a valve body 1, both sides of the valve body 1 are provided with a sealing valve stem assembly for opening or closing the internal channel of the valve body 1, one side of each sealing valve stem assembly is provided with a driving assembly for driving the sealing valve stem assembly to move, a melt inlet is provided at the top of the valve body 1, melt outlets are provided at both sides of the bottom of the valve body 1, and moving ports connected to adjacent melt outlets are opened on both sides of the valve body 1, the sealing valve stem assembly comprises a sealing rod 201 slidably arranged inside the moving port, a connecting block 202 fixedly mounted at one end of the sealing rod 201, and a sealing block 203 fixedly mounted on one side of the connecting block 202, one side of the sealing block 203 is arranged in an inclined shape, and the connecting block 202 is arranged in a trumpet shape with one side reduced, the driving assembly can drive the sealing valve stem assembly to block the melt outlet of the valve body 1, the inclined sealing block 203 can assist in guiding the melt when the melt flows, and the connecting block 202 will not occupy too much space for the melt to flow when the melt flows.

[0026] Combination Figure 1 and Figure 2 One end of the two sealing rods 201 is fixedly installed with a limit plate 4, one side of the two limit plates 4 is fixedly installed with a push rod 5, one side of the two push rods 5 is fixedly installed with a rack 6, the driving assembly includes a valve turntable 301 arranged on one side of the push rod 5, a driving rod 302 fixedly installed on one side of the valve turntable 301 and a driving gear 303 fixedly sleeved on the driving rod 302, the driving gear 303 is meshed and connected with the adjacent rack 6, when the valve turntable 301 rotates, the driving gear 303 will drive the rack 6 to move, and when the push rod 5 moves, the sealing rod 201 will move with the sealing block 203, thereby closing and blocking the melt outlet.

[0027] Combination Figure 1 Both sides of the valve body 1 are provided with a protective shell 7 for protecting the internal sealing valve stem assembly and the drive assembly, and the protective shell 7 is convenient for installing the three-way valve.

[0028] The implementation principle of a guided three-way valve with no melt retention in the embodiment of the present application is as follows: when the melt outlet of the three-way valve needs to be closed, the valve turntable 301 is rotated, and the driving rod 302 will rotate with the driving gear 303, so that the rack 6 can move, and the movement of the rack 6 will move the push rod 5, and the movement of the push rod 5 will push the limit plate 4 and the sealing rod 201 to move, so that the sealing block 203 moves to block the melt outlet. The turning points of the melt outlet inside the valve body 1 are smooth, and with the inclination of the sealing block 203 and the trumpet shape of the connecting block 202, the melt can flow without melt retention. This arrangement can reduce the number of auxiliary guiding components inside the three-way valve with no melt retention, reduce the possibility of components loosening due to vibration, and extend the service life of the three-way valve.

[0029] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A guided type three-way valve without melt retention, comprising a valve body (1), characterized in that: Both sides of the valve body (1) are provided with sealing valve stem assemblies for opening or closing the internal channel of the valve body (1); one side of each sealing valve stem assembly is provided with a driving assembly for driving the sealing valve stem assembly to move; a melt inlet is provided at the top of the valve body (1); melt outlets are provided at both sides of the bottom of the valve body (1); both sides of the valve body (1) are provided with moving ports connected to adjacent melt outlets; the sealing valve stem assembly comprises a sealing rod (201) slidably arranged inside the moving port, a connecting block (202) fixedly mounted at one end of the sealing rod (201), and a sealing block (203) fixedly mounted on one side of the connecting block (202).

2. A guided type non-retention melt three-way valve as claimed in claim 1, characterized in that: One side of the sealing block (203) is arranged in an inclined shape.

3. A guided type non-retention melt three-way valve as claimed in claim 1, characterized in that: The connection block (202) is arranged in a trumpet shape with one side narrowed.

4. A guided type non-retention melt three-way valve as claimed in claim 1, characterized in that: A limit plate (4) is fixedly mounted on one end of the two sealing rods (201), a push rod (5) is fixedly mounted on one side of the two limit plates (4), and a rack (6) is fixedly mounted on one side of the two push rods (5).

5. A guided type non-retention melt three-way valve as claimed in claim 4, characterized in that: The driving assembly comprises a valve turntable (301) arranged on one side of the push rod (5), a driving rod (302) fixedly mounted on one side of the valve turntable (301), and a driving gear (303) fixedly sleeved on the driving rod (302), wherein the driving gear (303) is meshedly connected with an adjacent rack (6).

6. A guided type non-retention melt three-way valve according to claim 1, characterized in that: Both sides of the valve body (1) are provided with a protective shell (7) for protecting the internal sealing valve stem assembly and the drive assembly.

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